HDMI (High-Definition Multimedia Interface) is a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for analog video standards.
|Type||Digital audio/video/data connector|
|Manufacturer||HDMI Adopters (over 1,700 companies)|
|Superseded||DVI, VGA, SCART, RGB Component|
|Width||13.9 mm (type A), 10.42 mm (type C), 6.4 mm (type D)|
|Height||4.45 mm (type A), 2.42 mm (type C), 2.8 mm (type D)|
|Audio signal||LPCM, Dolby Digital, DTS, DVD-Audio, Dolby Digital Plus, Dolby TrueHD, DTS-HD High Resolution Audio, DTS-HD Master Audio, MPCM, DSD, DST, Dolby Atmos, DTS:X|
|Video signal||Maximum resolution limited by available bandwidth|
|Pins||Types A, C, & D (19), Type B (29)|
|Bitrate||Up to 48 Gbit/s, as of HDMI 2.1|
|HDMI type A receptacle|
|Pin 1||TMDS Data2+|
|Pin 2||TMDS Data2 Shield|
|Pin 3||TMDS Data2−|
|Pin 4||TMDS Data1+|
|Pin 5||TMDS Data1 Shield|
|Pin 6||TMDS Data1−|
|Pin 7||TMDS Data0+|
|Pin 8||TMDS Data0 Shield|
|Pin 9||TMDS Data0−|
|Pin 10||TMDS Clock+|
|Pin 11||TMDS Clock Shield|
|Pin 12||TMDS Clock−|
|Pin 15||SCL (I²C serial clock for DDC)|
|Pin 16||SDA (I²C serial data for DDC)|
|Pin 17||Ground (for DDC, CEC, ARC, and HEC)|
|Pin 18||+5 V (min. 0.055 A)|
HDMI implements the EIA/CEA-861 standards, which define video formats and waveforms, transport of compressed and uncompressed LPCM audio, auxiliary data, and implementations of the VESA EDID.(p. III) CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the Digital Visual Interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used.(§C) The CEC (Consumer Electronics Control) capability allows HDMI devices to control each other when necessary and allows the user to operate multiple devices with one handheld remote control device.(§6.3)
Several versions of HDMI have been developed and deployed since the initial release of the technology, but all use the same cable and connector. Other than improved audio and video capacity, performance, resolution and color spaces, newer versions have optional advanced features such as 3D, Ethernet data connection, and CEC (Consumer Electronics Control) extensions.
Production of consumer HDMI products started in late 2003. In Europe, either DVI-HDCP or HDMI is included in the HD ready in-store labeling specification for TV sets for HDTV, formulated by EICTA with SES Astra in 2005. HDMI began to appear on consumer HDTVs in 2004 and camcorders and digital still cameras in 2006. As of January 6, 2015[update] (twelve years after the release of the first HDMI specification), over 4 billion HDMI devices have been sold.
The HDMI founders were Hitachi, Panasonic, Philips, Silicon Image, Sony, Thomson, RCA, and Toshiba. Digital Content Protection, LLC provides HDCP (which was developed by Intel) for HDMI. HDMI has the support of motion picture producers Fox, Universal, Warner Bros. and Disney, along with system operators DirecTV, EchoStar (Dish Network) and CableLabs.
The HDMI founders began development on HDMI 1.0 on April 16, 2002, with the goal of creating an AV connector that was backward-compatible with DVI. At the time, DVI-HDCP (DVI with HDCP) and DVI-HDTV (DVI-HDCP using the CEA-861-B video standard) were being used on HDTVs. HDMI 1.0 was designed to improve on DVI-HDTV by using a smaller connector and adding audio capability and enhanced Y′CBCR capability and consumer electronics control functions.
The first Authorized Testing Center (ATC), which tests HDMI products, was opened by Silicon Image on June 23, 2003, in California, United States. The first ATC in Japan was opened by Panasonic on May 1, 2004, in Osaka. The first ATC in Europe was opened by Philips on May 25, 2005, in Caen, France. The first ATC in China was opened by Silicon Image on November 21, 2005, in Shenzhen. The first ATC in India was opened by Philips on June 12, 2008, in Bangalore. The HDMI website contains a list of all the ATCs.
According to In-Stat, the number of HDMI devices sold was 5 million in 2004, 17.4 million in 2005, 63 million in 2006, and 143 million in 2007. HDMI has become the de facto standard for HDTVs, and according to In-Stat, around 90% of digital televisions in 2007 included HDMI. In-Stat has estimated that 229 million HDMI devices were sold in 2008. On April 8, 2008 there were over 850 consumer electronics and PC companies that had adopted the HDMI specification (HDMI adopters). On January 7, 2009, HDMI Licensing, LLC announced that HDMI had reached an installed base of over 600 million HDMI devices. In-Stat has estimated that 394 million HDMI devices would sell in 2009 and that all digital televisions by the end of 2009 would have at least one HDMI input.
In 2008, PC Magazine awarded a Technical Excellence Award in the Home Theater category for an "innovation that has changed the world" to the CEC portion of the HDMI specification. Ten companies were given a Technology and Engineering Emmy Award for their development of HDMI by the National Academy of Television Arts and Sciences on January 7, 2009.
On October 25, 2011, the HDMI Forum was established by the HDMI founders to create an open organization so that interested companies can participate in the development of the HDMI specification. All members of the HDMI Forum have equal voting rights, may participate in the Technical Working Group, and if elected can be on the Board of Directors. There is no limit to the number of companies allowed in the HDMI Forum though companies must pay an annual fee of US$15,000 with an additional annual fee of $5,000 for those companies who serve on the Board of Directors. The Board of Directors is made up of 11 companies who are elected every 2 years by a general vote of HDMI Forum members. All future development of the HDMI specification take place in the HDMI Forum and are built upon the HDMI 1.4b specification. Also on the same day HDMI Licensing, LLC announced that there were over 1,100 HDMI adopters and that over 2 billion HDMI-enabled products had shipped since the launch of the HDMI standard. From October 25, 2011, all development of the HDMI specification became the responsibility of the newly created HDMI Forum.
On January 8, 2013, HDMI Licensing, LLC announced that there were over 1,300 HDMI adopters and that over 3 billion HDMI devices had shipped since the launch of the HDMI standard. The day also marked the 10th anniversary of the release of the first HDMI specification.
The HDMI specification defines the protocols, signals, electrical interfaces and mechanical requirements of the standard.(p. V) The maximum pixel clock rate for HDMI 1.0 is 165 MHz, which is sufficient to allow 1080p and WUXGA (1920×1200) at 60 Hz. HDMI 1.3 increases that to 340 MHz, which allows for higher resolution (such as WQXGA, 2560×1600) across a single digital link. An HDMI connection can either be single-link (type A/C/D) or dual-link (type B) and can have a video pixel rate of 25 MHz to 340 MHz (for a single-link connection) or 25 MHz to 680 MHz (for a dual-link connection). Video formats with rates below 25 MHz (e.g., 13.5 MHz for 480i/NTSC) are transmitted using a pixel-repetition scheme.
HDMI uses the Consumer Electronics Association/Electronic Industries Alliance 861 standards. HDMI 1.0 to HDMI 1.2a uses the EIA/CEA-861-B video standard, HDMI 1.3 uses the CEA-861-D video standard, and HDMI 1.4 uses the CEA-861-E video standard.(p. III) The CEA-861-E document defines "video formats and waveforms; colorimetry and quantization; transport of compressed and uncompressed LPCM audio; carriage of auxiliary data; and implementations of the Video Electronics Standards Association (VESA) Enhanced Extended Display Identification Data Standard (E-EDID)". On July 15, 2013, the CEA announced the publication of CEA-861-F, a standard that can be used by interfaces such as DVI, HDMI, and LVDS. CEA-861-F adds the ability to transmit several Ultra HD video formats and additional color spaces.
To ensure baseline compatibility between different HDMI sources and displays (as well as backward compatibility with the electrically compatible DVI standard) all HDMI devices must implement the sRGB color space at 8 bits per component.(§6.2.3) Ability to use the Y′CBCR color space and higher color depths ("deep color") is optional. HDMI permits sRGB 4:4:4 chroma subsampling (8–16 bits per component), xvYCC 4:4:4 chroma subsampling (8–16 bits per component), Y′CBCR 4:4:4 chroma subsampling (8–16 bits per component), or Y′CBCR 4:2:2 chroma subsampling (8–12 bits per component). The color spaces that can be used by HDMI are ITU-R BT.601, ITU-R BT.709-5 and IEC 61966-2-4.(§§6.5,6.7.2)
For digital audio, if an HDMI device has audio, it is required to implement the baseline format: stereo (uncompressed) PCM. Other formats are optional, with HDMI allowing up to 8 channels of uncompressed audio at sample sizes of 16-bit, 20-bit and 24-bit, with sample rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz and 192 kHz.(§7) HDMI also carries any IEC 61937-compliant compressed audio stream, such as Dolby Digital and DTS, and up to 8 channels of one-bit DSD audio (used on Super Audio CDs) at rates up to four times that of Super Audio CD.(§7) With version 1.3, HDMI allows lossless compressed audio streams Dolby TrueHD and DTS-HD Master Audio.(§7) As with the Y′CBCR video, audio capability is optional. Audio return channel (ARC) is a feature introduced in the HDMI 1.4 standard. "Return" refers to the case where the audio comes from the TV and can be sent "upstream" to the AV receiver using the HDMI cable connected to the AV receiver. An example given on the HDMI website is that a TV that directly receives a terrestrial/satellite broadcast, or has a video source built in, sends the audio "upstream" to the AV receiver.
The HDMI standard was not designed to pass closed caption data (for example, subtitles) to the television for decoding. As such, any closed caption stream must be decoded and included as an image in the video stream(s) prior to transmission over an HDMI cable to appear on the DTV. This limits the caption style (even for digital captions) to only that decoded at the source prior to HDMI transmission. This also prevents closed captions when transmission over HDMI is required for upconversion. For example, a DVD player that sends an upscaled 720p/1080i format via HDMI to an HDTV has no way to pass Closed Captioning data so that the HDTV can decode it, as there is no line 21 VBI in that format.
Display Data Channel (DDC)Edit
The Display Data Channel (DDC) is a communication channel based on the I²C bus specification. HDMI specifically requires the device implement the Enhanced Display Data Channel (E-DDC), which is used by the HDMI source device to read the E-EDID data from the HDMI sink device to learn what audio/video formats it can take.(§§8.1,CEC-1.2–CEC-1.3) HDMI requires that the E-DDC implement I²C standard mode speed (100 kbit/s) and allows it to optionally implement fast mode speed (400 kbit/s).(§4.2.8)
The DDC channel is actively used for High-bandwidth Digital Content Protection (HDCP).
Transition-Minimized Differential Signaling (TMDS)Edit
Transition-minimized differential signaling (TMDS) on HDMI interleaves video, audio and auxiliary data using three different packet types, called the Video Data Period, the Data Island Period and the Control Period. During the Video Data Period, the pixels of an active video line are transmitted. During the Data Island period (which occurs during the horizontal and vertical blanking intervals), audio and auxiliary data are transmitted within a series of packets. The Control Period occurs between Video and Data Island periods.(§5.1.2)
Both HDMI and DVI use TMDS to send 10-bit characters that are encoded using 8b/10b encoding that differs from the original IBM form for the Video Data Period and 2b/10b encoding for the Control Period. HDMI adds the ability to send audio and auxiliary data using 4b/10b encoding for the Data Island Period. Each Data Island Period is 32 pixels in size and contains a 32-bit Packet Header, which includes 8 bits of BCH ECC parity data for error correction and describes the contents of the packet. Each packet contains four subpackets, and each subpacket is 64 bits in size, including 8 bits of BCH ECC parity data, allowing for each packet to carry up to 224 bits of audio data. Each Data Island Period can contain up to 18 packets. Seven of the 15 packet types described in the HDMI 1.3a specifications deal with audio data, while the other 8 types deal with auxiliary data. Among these are the General Control Packet and the Gamut Metadata Packet. The General Control Packet carries information on AVMUTE (which mutes the audio during changes that may cause audio noise) and Color Depth (which sends the bit depth of the current video stream and is required for deep color). The Gamut Metadata Packet carries information on the color space being used for the current video stream and is required for xvYCC.(§§5.2–5.3,6.5.3,6.7.2,6.7.3)
Consumer Electronics Control (CEC)Edit
Consumer Electronics Control (CEC) is an HDMI feature designed to allow the user to command and control up to 15 CEC-enabled devices, that are connected through HDMI, by using only one of their remote controls (for example by controlling a television set, set-top box, and DVD player using only the remote control of the TV). CEC also allows for individual CEC-enabled devices to command and control each other without user intervention.(§CEC-3.1)
It is a one-wire bidirectional serial bus that is based on the CENELEC standard AV.link protocol to perform remote control functions. CEC wiring is mandatory, although implementation of CEC in a product is optional.(§8.1) It was defined in HDMI Specification 1.0 and updated in HDMI 1.2, HDMI 1.2a and HDMI 1.3a (which added timer and audio commands to the bus).(§§CEC-1.2,CEC-1.3,CEC-3.1,CEC-5) USB to CEC adapters exist that allow a computer to control CEC-enabled devices.
HDMI Ethernet and Audio Return ChannelEdit
Introduced in HDMI 1.4, HDMI Ethernet and Audio Return Channel (HEAC) adds a high-speed bidirectional data communication link (HEC) and the ability to send audio data upstream to the source device (ARC). HEAC utilizes two lines from the connector: the previously unused Reserved pin (called HEAC+) and the Hot Plug Detect pin (called HEAC−).(§HEAC-2.1) If only ARC transmission is required, a single mode signal using the HEAC+ line can be used, otherwise, HEC is transmitted as a differential signal over the pair of lines, and ARC as a common mode component of the pair.(§HEAC-2.2)
Audio Return Channel (ARC)
ARC is an audio link meant to replace other cables between the TV and the A/V receiver or speaker system. This direction is used when the TV is the one that generates or receives the video stream instead of the other equipment. A typical case is the running of an app on a smart TV such as Netflix, but reproduction of audio is handled by the other equipment. Without ARC, the audio output from the TV must be routed by another cable, typically TOSLink or coax, into the speaker system.
HDMI Ethernet Channel (HEC)
HDMI Ethernet Channel technology consolidates video, audio, and data streams into a single HDMI cable, and the HEC feature enables IP-based applications over HDMI and provides a bidirectional Ethernet communication at 100 Mbit/s. The physical layer of the Ethernet implementation uses a hybrid to simultaneously send and receive attenuated 100BASE-TX-type signals through a single twisted pair.‹See TfM›[failed verification]‹See TfM›[failed verification]
Compatibility with DVIEdit
HDMI is backward compatible with single-link Digital Visual Interface digital video (DVI-D or DVI-I, but not DVI-A or dual-link DVI). No signal conversion is required when an adapter or asymmetric cable is used, so there is no loss of video quality.(appx. C)
From a user's perspective, an HDMI display can be driven by a single-link DVI-D source, since HDMI and DVI-D define an overlapping minimum set of allowed resolutions and frame-buffer formats to ensure a basic level of interoperability. In the reverse case, a DVI-D monitor has the same level of basic interoperability unless content protection with High-bandwidth Digital Content Protection (HDCP) interferes—or the HDMI color encoding is in component color space Y′CBCR instead of RGB, which is not possible in DVI. An HDMI source, such as a Blu-ray player, may require an HDCP-compliant display, and refuse to output HDCP-protected content to a non-compliant display. A further complication is that there is a small amount of display equipment, such as some high-end home theater projectors, designed with HDMI inputs but not HDCP-compliant.
Any DVI-to-HDMI adapter can function as an HDMI-to-DVI adapter (and vice versa). Typically, the only limitation is the gender of the adapter's connectors and the gender of the cables and sockets it is used with.
Features specific to HDMI, such as remote-control and audio transport, are not available in devices that use legacy DVI-D signalling. However, many devices output HDMI over a DVI connector (e.g., ATI 3000-series and NVIDIA GTX 200-series video cards),(appx. C) and some multimedia displays may accept HDMI (including audio) over a DVI input. Exact capabilities beyond basic compatibility vary. Adapters are generally bi-directional.
Content protection (HDCP)Edit
High-bandwidth Digital Content Protection (HDCP) is a newer form of digital rights management. Intel created the original technology to make sure that digital content followed the guidelines set by the Digital Content Protection group.
HDMI can use HDCP to encrypt the signal if required by the source device. CSS, CPRM and AACS require the use of HDCP on HDMI when playing back encrypted DVD Video, DVD Audio, HD DVD and Blu-ray Disc. The HDCP Repeater bit controls the authentication and switching/distribution of an HDMI signal. According to HDCP Specification 1.2 (beginning with HDMI CTS 1.3a), any system that implements HDCP must do so in a fully compliant manner. HDCP testing that was previously only a requirement for optional tests such as the "Simplay HD" testing program is now part of the requirements for HDMI compliance.(§9.2) HDCP accommodates up to 127 connected devices with up to 7 levels, using a combination of sources, sinks and repeaters. A simple example of this is several HDMI devices connected to an HDMI AV receiver that is connected to an HDMI display.
Devices called HDCP strippers can remove the HDCP information from the video signal so the video can play on non-HDCP-compliant displays, though a fair use and non-disclosure form must usually be signed with a registering agency before use.
There are five HDMI connector types. Type A/B are defined in the HDMI 1.0 specification, type C is defined in the HDMI 1.3 specification, and type D/E are defined in the HDMI 1.4 specification.
- Type A
- The plug (male) connector outside dimensions are 13.9 mm × 4.45 mm, and the receptacle (female) connector inside dimensions are 14 mm × 4.55 mm.(§22.214.171.124) There are 19 pins, with bandwidth to carry all SDTV, EDTV, HDTV, UHD, and 4K modes.(§6.3) It is electrically compatible with single-link DVI-D.(§4.1.3)
- Type B
- This connector is 21.2 mm × 4.45 mm and has 29 pins, carrying six differential pairs instead of three, for use with very high-resolution displays such as WQUXGA (3840×2400). It is electrically compatible with dual-link DVI-D, but has not yet been used in any products. With the introduction of HDMI 1.3, the maximum bandwidth of single-link HDMI exceeded that of dual-link DVI-D. As of HDMI 1.4, the pixel clock rate crossover frequency from single to dual-link has not been defined.(§§4.1.3,126.96.36.199)
- Type C
- This Mini connector is smaller than the type A plug, measuring 10.42 mm × 2.42 mm but has the same 19-pin configuration.(§§188.8.131.52,184.108.40.206) It is intended for portable devices.(§4.1.1) The differences are that all positive signals of the differential pairs are swapped with their corresponding shield, the DDC/CEC Ground is assigned to pin 13 instead of pin 17, the CEC is assigned to pin 14 instead of pin 13, and the reserved pin is 17 instead of pin 14.(§220.127.116.11) The type C Mini connector can be connected to a type A connector using a type A-to-type C cable.(§4.1.1)
- Type D
- This Micro connector shrinks the connector size to something resembling a micro-USB connector, measuring only 5.83 mm × 2.20 mm(fig. 18.104.22.168) For comparison, a micro-USB connector is 6.85 mm × 1.8 mm and a USB Type-A connector is 11.5 mm × 4.5 mm. It keeps the standard 19 pins of types A and C, but the pin assignment is different from both.
- Type E
- The Automotive Connection System has a locking tab to keep the cable from vibrating loose and a shell to help prevent moisture and dirt from interfering with the signals. A relay connector is available for connecting standard consumer cables to the automotive type.
The HDMI alternate mode lets a user connect the reversible USB-C connector with the HDMI source devices (mobile, tablet, laptop). This cable connects to video display/sink devices using any of the native HDMI connectors. This is an HDMI cable, in this case a USB-C to HDMI cable.
An HDMI cable is composed of four shielded twisted pairs, with impedance of the order of 100 Ω (±15%), plus seven separate conductors. HDMI cables with Ethernet differ in that three of the separate conductors instead form an additional shielded twisted pair (with the CEC/DDC ground as a shield).(§HEAC-2.9)
Although no maximum length for an HDMI cable is specified, signal attenuation (dependent on the cable's construction quality and conducting materials) limits usable lengths in practice and certification is difficult to achieve for lengths beyond 13 m. HDMI 1.3 defines two cable categories: Category 1-certified cables, which have been tested at 74.25 MHz (which would include resolutions such as 720p60 and 1080i60), and Category 2-certified cables, which have been tested at 340 MHz (which would include resolutions such as 1080p60 and 4K30).(§4.2.6) Category 1 HDMI cables are marketed as "Standard" and Category 2 HDMI cables as "High Speed". This labeling guideline for HDMI cables went into effect on October 17, 2008. Category 1 and 2 cables can either meet the required parameter specifications for inter-pair skew, far-end crosstalk, attenuation and differential impedance, or they can meet the required non equalized/equalized eye diagram requirements.(§4.2.6) A cable of about 5 meters (16 feet) can be manufactured to Category 1 specifications easily and inexpensively by using 28 AWG (0.081 mm²) conductors. With better quality construction and materials, including 24 AWG (0.205 mm²) conductors, an HDMI cable can reach lengths of up to 15 meters (49 feet). Many HDMI cables under 5 meters of length that were made before the HDMI 1.3 specification can work as Category 2 cables, but only Category 2-tested cables are guaranteed to work for Category 2 purposes.
- Standard HDMI Cable – up to 1080i and 720p
- Standard HDMI Cable with Ethernet
- Standard Automotive HDMI Cable
- High Speed HDMI Cable – 1080p, 4K 30 Hz, 3D and deep color
- High Speed HDMI Cable with Ethernet
A new certification program was introduced in October 2015 to certify that cables work at the 18 Gbit/s maximum bandwidth of the HDMI 2.0 specification. In addition to expanding the set of cable testing requirements, the certification program introduces an EMI test to ensure cables minimize interference with wireless signals. These cables are marked with an anti-counterfeiting authentication label and are defined as:
- Premium High Speed HDMI Cable
- Premium High Speed HDMI Cable with Ethernet
In conjunction with the HDMI 2.1 specification, a third category of cable was announced on January 4, 2017, called "48G". Also known as Category 3 HDMI or "Ultra High Speed" HDMI, the cable is designed to support the 48 Gbit/s bandwidth of HDMI 2.1, supporting 4K, 5K, 8K and 10K at 120 Hz. The cable is backwards compatible with the earlier HDMI devices, using existing HDMI type A, C and D connectors, and includes HDMI Ethernet.
- Ultra High Speed HDMI Cable (48G Cable) – 4K, 5K, 8K and 10K at 120 Hz
An HDMI extender is a single device (or pair of devices) powered with an external power source or with the 5V DC from the HDMI source. Long cables can cause instability of HDCP and blinking on the screen, due to the weakened DDC signal that HDCP requires. HDCP DDC signals must be multiplexed with TMDS video signals to comply with HDCP requirements for HDMI extenders based on a single Category 5/Category 6 cable. Several companies offer amplifiers, equalizers and repeaters that can string several standard HDMI cables together. Active HDMI cables use electronics within the cable to boost the signal and allow for HDMI cables of up to 30 meters (98 feet); those based on HDBaseT can extend to 100 meters; HDMI extenders that are based on dual Category 5/Category 6 cable can extend HDMI to 250 meters (820 feet); while HDMI extenders based on optical fiber can extend HDMI to 300 meters (980 feet).
The HDMI specification is not an open standard; manufacturers need to be licensed by HDMI LLC in order to implement HDMI in any product or component. Companies who are licensed by HDMI LLC are known as HDMI Adopters.
While earlier versions of HDMI specs are available to the public for download, only Adopters have access to the latest standards (HDMI 1.4/1.4a/2).
- Only Adopters have access to the Compliance Test Specification (CTS) that is used for compliance and certification
This is required before any HDMI product can be legally sold.
- Adopters have IP rights
- Adopters receive the right to use HDMI logos and TMs on their products and marketing materials
- Adopters are listed on the HDMI website
- Products from Adopters are listed and marketed in the official HDMI product finder database
- Adopters receive more exposure through combined marketing, such as the annual HDMI Developers Conference and technology seminars
HDMI Fee StructureEdit
There are 2 annual fee structures associated with being an HDMI Adopter:
- High-volume (more than 10,000 units) HDMI Adopter Agreement – US$10k/year
- Low-volume (10,000 units or fewer) HDMI Adopter Agreement – US$5k/year + flat US$1/unit administration fee
The annual fee is due upon the execution of the Adopter Agreement, and must be paid on the anniversary of this date each year thereafter.
The royalty fee structure is the same for all volumes. The following variable per-unit royalty is device-based and not dependent on number of ports, chips or connectors:
- US$0.15 – for each end-user licensed product
- US$0.05 – if the HDMI logo is used on the product and promotional material, the per-unit fee drops from US$0.15 to US$0.05.
- US$0.04 – if HDCP is implemented and HDMI logo is used, the per-unit fee drops from US$0.05 to US$0.04
Use of HDMI logo requires compliance testing. Adopters must license HDCP separately.
The HDMI royalty is only payable on Licensed Products that will be sold on a stand-alone basis (i.e. that are not incorporated into another Licensed Product that is subject to an HDMI royalty). For example, if a cable or IC is sold to an Adopter who then includes it in a television subject to a royalty, then the cable or IC maker would not pay a royalty, and the television manufacturer would pay the royalty on the final product. If the cable is sold directly to consumers, then the cable would be subject to a royalty.
HDMI devices are manufactured to adhere to various versions of the specification, in which each version is given a number or letter, such as 1.0, 1.2, or 1.4b.(p. III) Each subsequent version of the specification uses the same kind of cable but increases the bandwidth or capabilities of what can be transmitted over the cable.(p. III) A product listed as having an HDMI version does not necessarily mean that it has all features in that version, since some HDMI features are optional, such as deep color and xvYCC (which is branded by Sony as "x.v.Color"). Since the release of HDMI 1.4, the HDMI Licensing LLC group (which oversees the HDMI standard) has banned the use of version numbers to identify cables. Non-cable HDMI products, starting on January 1, 2012, may no longer reference the HDMI number, and must state which features of the HDMI specification the product implements.
HDMI 1.0 was released on December 9, 2002 and is a single-cable digital audio/video connector interface. The link architecture is based on DVI, using exactly the same video transmission format but sending audio and other auxiliary data during the blanking intervals of the video stream. HDMI 1.0 allows a maximum TMDS clock of 165 MHz (4.95 Gbit/s bandwidth per link), the same as DVI. It defines two connectors called Type A and Type B, with pinouts based on the Single-Link DVI-D and Dual-Link DVI-D connectors respectively, though the Type B connector was never used in any commercial products. HDMI 1.0 uses TMDS encoding for video transmission, giving it 3.96 Gbit/s of video bandwidth (1920 × 1080 or 1920 × 1200 at 60 Hz) and 8-channel LPCM/192 kHz/24-bit audio. HDMI 1.0 requires support for RGB video, with optional support for Y′CBCR 4:4:4 and 4:2:2 (mandatory if the device has support for Y′CBCR on other interfaces). Color depth of 10 bpc (30 bit/px) or 12 bpc (36 bit/px) is allowed when using 4:2:2 subsampling, but only 8 bpc (24 bit/px) color depth is permitted when using RGB or Y′CBCR 4:4:4. Only the Rec. 601 and Rec. 709 color spaces are supported. HDMI 1.0 allows only specific pre-defined video formats, including all the formats defined in EIA/CEA-861-B and some additional formats listed in the HDMI Specification itself. All HDMI sources/sinks must also be capable of sending/receiving native Single-Link DVI video and be fully compliant with the DVI Specification.
HDMI 1.1 was released on May 20, 2004 and added support for DVD-Audio.
HDMI 1.2 was released on August 8, 2005 and added the option of One Bit Audio, used on Super Audio CDs, at up to 8 channels. To make HDMI more suitable for use on PC devices, version 1.2 also removed the requirement that only explicitly supported formats be used. It added the ability for manufacturers to create vendor-specific formats, allowing any arbitrary resolution and refresh rate rather than being limited to a pre-defined list of supported formats. In addition, it added explicit support for several new formats including 720p at 100 and 120 Hz and relaxed the pixel format support requirements so that sources with only native RGB output (PC sources) would not be required to support Y′CBCR output.(§6.2.3)
HDMI 1.3 was released on June 22, 2006, and increased the maximum TMDS clock to 340 MHz (10.2 Gbit/s). Like previous versions, it uses TMDS encoding, giving it a maximum video bandwidth of 8.16 Gbit/s (1920 × 1080 at 120 Hz or 2560 × 1440 at 60 Hz). It added support for 10 bpc, 12 bpc, and 16 bpc color depth (30, 36, and 48 bit/px), called deep color. It also added support for the xvYCC color space, in addition to the Rec. 601 and Rec. 709 color spaces supported by previous versions, and added the ability to carry metadata defining color gamut boundaries. It also optionally allows output of Dolby TrueHD and DTS-HD Master Audio streams for external decoding by AV receivers. It incorporates automatic audio syncing (audio video sync) capability. It defined cable Categories 1 and 2, with Category 1 cable being tested up to 74.25 MHz and Category 2 being tested up to 340 MHz.(§4.2.6) It also added the new type C Mini connector for portable devices.(§4.1.1)
HDMI 1.3a was released on November 10, 2006, and had Cable and Sink modifications for type C, source termination recommendations, and removed undershoot and maximum rise/fall time limits. It also changed CEC capacitance limits, and CEC commands for timer control were brought back in an altered form, with audio control commands added. It also added the optional ability to stream SACD in its bitstream DST format rather than uncompressed raw DSD.
HDMI 1.4 was released on June 5, 2009, and first came to market after Q2 of 2009. Retaining the bandwidth of the previous version, HDMI 1.4 added support for 4096 × 2160 at 24 Hz, 3840 × 2160 at 24, 25, and 30 Hz, and 1920 × 1080 at 120 Hz.(§6.3.2) It also added an HDMI Ethernet Channel (HEC) that accommodates a 100 Mbit/s Ethernet connection between the two HDMI connected devices so they can share an Internet connection, introduced an audio return channel (ARC), 3D Over HDMI, a new Micro HDMI Connector, an expanded set of color spaces with the addition of sYCC601, Adobe RGB and Adobe YCC601, and an Automotive Connection System. HDMI 1.4 defined several stereoscopic 3D formats including field alternative (interlaced), frame packing (a full resolution top-bottom format), line alternative full, side-by-side half, side-by-side full, 2D + depth, and 2D + depth + graphics + graphics depth (WOWvx). HDMI 1.4 requires that 3D displays implement the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24. High Speed HDMI cables as defined in HDMI 1.3 work with all HDMI 1.4 features except for the HDMI Ethernet Channel, which requires the new High Speed HDMI Cable with Ethernet defined in HDMI 1.4.
HDMI 1.4a was released on March 4, 2010, and added two mandatory 3D formats for broadcast content, which was deferred with HDMI 1.4 pending the direction of the 3D broadcast market. HDMI 1.4a has defined mandatory 3D formats for broadcast, game, and movie content. HDMI 1.4a requires that 3D displays implement the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24, side-by-side horizontal at either 1080i50 or 1080i60, and top-and-bottom at either 720p50 and 1080p24 or 720p60 and 1080p24.
HDMI 1.4b was released on October 11, 2011, containing only minor clarifications to the 1.4a document. HDMI 1.4b is the last version of the standard that HDMI Licensing, LLC is responsible for. All future versions of the HDMI Specification were produced by the HDMI Forum, created on October 25, 2011.
HDMI 2.0 increases the maximum bandwidth to 18.0 Gbit/s. HDMI 2.0 uses TMDS encoding for video transmission like previous versions, giving it a maximum video bandwidth of 14.4 Gbit/s. This enables HDMI 2.0 to carry 4K video at 60 Hz with 24 bit/px color depth. Other features of HDMI 2.0 include support for the Rec. 2020 color space, up to 32 audio channels, up to 1536 kHz audio sample frequency, dual video streams to multiple users on the same screen, up to four audio streams, 4:2:0 chroma subsampling, 25 fps 3D formats, support for the 21:9 aspect ratio, dynamic synchronization of video and audio streams, the HE-AAC and DRA audio standards, improved 3D capability, and additional CEC functions.
HDMI 2.0b was released March, 2016. HDMI 2.0b initially supported the same HDR10 standard as HDMI 2.0a as specified in the CTA-861.3 specification. In December 2016 additional support for HDR Video transport was added to HDMI 2.0b in the recently released CTA-861-G specification, which extends the static metadata signaling to include Hybrid Log-Gamma (HLG).
HDMI 2.1 was officially announced by the HDMI Forum on January 4, 2017, and was released on November 28, 2017. It adds support for higher resolutions and higher refresh rates, including 4K 120 Hz and 8K 120 Hz. HDMI 2.1 also introduces a new HDMI cable category called Ultra High Speed (referred to as 48G during development), which certifies cables at the new higher speeds that these formats require. Ultra High Speed HDMI cables are backwards compatible with older HDMI devices, and older cables are compatible with new HDMI 2.1 devices, though the full 48 Gbit/s bandwidth is not possible without the new cables.
- Maximum supported format is 10K at 120 Hz
- Dynamic HDR for specifying HDR metadata on a scene-by-scene or even a frame-by-frame basis
- Display Stream Compression (DSC) 1.2 is used for video formats higher than 8K with 4:2:0 chroma subsampling
- High Frame Rate (HFR) for 4K, 8K, and 10K, which adds support for refresh rates up to 120 Hz
- Enhanced Audio Return Channel (eARC) for object-based audio formats such as Dolby Atmos and DTS:X
- Enhanced refresh rate features:
- Variable Refresh Rate (VRR) reduces or eliminates lag, stutter and frame tearing for more fluid motion in games
- Quick Media Switching (QMS) for movies and video eliminates the delay that can result in blank screens before content begins to be displayed
- Quick Frame Transport (QFT) reduces latency by bursting individual pictures across the HDMI link as fast as possible when the link's hardware supports more bandwidth than the minimum amount needed for the resolution and frame rate of the content. With QFT, individual pictures arrive earlier and some hardware blocks can be fully powered off for longer periods of time between pictures to reduce heat generation and extend battery life.
- Auto Low Latency Mode (ALLM) – When a display device supports the option to either optimize its pixel processing for best latency or best pixel processing, ALLM allows the current HDMI source device to automatically select, based on its better understanding of the nature of its own content, which mode the user would most likely prefer.
Video formats that require more bandwidth than 18.0 Gbit/s (4K 60 Hz 8 bpc RGB), such as 4K 60 Hz 10 bpc (HDR), 4K 120 Hz, and 8K 60 Hz, may require the new "Ultra High Speed" or "Ultra High Speed with Ethernet" cables. HDMI 2.1's other new features are supported with existing HDMI cables.
The increase in maximum bandwidth is achieved by increasing both the bitrate of the data channels and the number of channels. Previous HDMI versions use three data channels (each operating at up to 6.0 GHz in HDMI 2.0, or up to 3.4 GHz in HDMI 1.4), with an additional channel for the TMDS clock signal, which runs at a fraction of the data channel speed (one tenth the speed, or up to 340 MHz, for signaling rates up to 3.4 GHz; one fortieth the speed, or up to 150 MHz, for signaling rates between 3.4 and 6.0 GHz). HDMI 2.1 doubles the signaling rate of the data channels to 12 GHz (12 Gbit/s). The structure of the data has been changed to use a new packet-based format with an embedded clock signal, which allows what was formerly the TMDS clock channel to be used as a fourth data channel instead, increasing the signaling rate across that channel to 12 GHz as well. These changes increase the aggregate bandwidth from 18.0 Gbit/s (3 × 6.0 Gbit/s) to 48.0 Gbit/s (4 × 12.0 Gbit/s), a 2.66x improvement in bandwidth. In addition, the data is transmitted more efficiently by using a 16b/18b encoding scheme, which uses a larger percentage of the bandwidth for data rather than DC balancing compared to the TMDS scheme used by previous versions (88.8% compared to 80%). This, in combination with the 2.66x bandwidth, raises the maximum data rate of HDMI 2.1 from 14.4 Gbit/s to 42.66 Gbit/s, approximately 2.96x the data rate of HDMI 2.0.
The 48 Gbit/s bandwidth provided by HDMI 2.1 is enough for 8K resolution at approximately 50 Hz, with 8 bpc RGB or Y′CBCR 4:4:4 color. To achieve even higher formats, HDMI 2.1 can use Display Stream Compression with a compression ratio of up to 3:1. Using DSC, formats up to 8K (7680 × 4320) 120 Hz or 10K (10240 × 4320) 100 Hz at 8 bpc RGB/4:4:4 are possible. Using Y′CBCR with 4:2:2 or 4:2:0 chroma subsampling in combination with DSC can allow for even higher formats.
The "version" of a connection depends on the versions of the HDMI ports on the source and sink devices, not on the HDMI cable. The different categories of HDMI cable only affect the bandwidth (maximum resolution / refresh rate) of the connection. Other features such as audio, 3D, chroma subsampling, or variable refresh rate depend only on the versions of the ports, and are not affected by what type of HDMI cable is used. The only exception to this is Ethernet-over-HDMI, which requires an "HDMI with Ethernet" cable.
Products are not required to implement all features of a version to be considered compliant with that version, as most features are optional. For example, displays with HDMI 1.4 ports do not necessarily support the full 340 MHz TMDS clock allowed by HDMI 1.4; they are commonly limited to lower speeds such as 300 MHz (1080p 120 Hz) or even as low as 165 MHz (1080p 60 Hz) at the manufacturer's discretion, but are still considered HDMI 1.4-compliant. Likewise, features like 10 bpc (30 bit/px) color depth may also not be supported, even if the HDMI version allows it and the display supports it over other interfaces such as DisplayPort.
Feature support will therefore vary from device to device, even within the same HDMI version.
|Release Date||Nov 2017|
|Max. Transmission Bit Rate (Gbit/s)[a]||4.95||10.2||10.2||18.0||48.0|
|Max. Data Rate (Gbit/s)[b]||3.96||8.16||8.16||14.4||42.6|
|Max. TMDS Character Rate (MHz)[c]||165(§3)||340||340||600(§6.1.1)||N/A|
|Color Format Support|
|Color Depth Support|
|bpc (24 bit/px)8||Yes(§3)||Yes||Yes||Yes||Yes|
|10 bpc (30 bit/px)||Yes[f]||Yes||Yes||Yes||Yes|
|12 bpc (36 bit/px)||Yes[f]||Yes||Yes||Yes||Yes|
|16 bpc (48 bit/px)||No||Yes(§6.5)||Yes||Yes||Yes|
|Color Space Support|
|Adobe RGB (1998)||No||No||Yes(§22.214.171.124)||Yes||Yes|
|Max. Sample Rate Per Channel (kHz)||192(§7.3)||192||192||192||192|
|Max. Aggregate Sample Rate (kHz)||?||?||768(§7.3)||1536(§9.2)||1536|
|Sample Size (bits)||16–24(§7.3)||16–24||16–24||16–24||16–24|
|Maximum Audio Channels||8(§7.3.1)||8||8||32(§8.3.1)||32|
- Total transmission bit rate is equal to the number of data channels multiplied by the bit rate per channel (binary digits transmitted per second). Each channel transmits one bit (binary digit) per signal, and signals at ten times the character rate. Therefore, the total transmission bit rate (in Mbit/s) = 10 × (character rate in MHz) × (# of data channels).
- Some of the transmitted bits are used for encoding purposes rather than representing data, so the rate at which video data can be transmitted across the HDMI interface is only a portion of the total bit rate.
- The TMDS character rate is the number of 10-bit TMDS characters per second transmitted across one HDMI data channel. This is sometimes informally referred to as the pixel clock or TMDS clock because these terms were once equivalent in past HDMI versions.(§4.2.2)
- TMDS encoding uses 10 bits of the transmission to send 8 bits of data, so only 80% of the transmission bit rate is available for data throughput. 16b/18b encoding uses 18 bits of bandwidth to send 16 bits of data, so 88.8% of the transmission bit rate is available for data throughput.
- Although HDMI 1.4 does not officially allow 4:2:0 chroma subsampling, NVIDIA and AMD have added 4:2:0 support to their HDMI 1.4 graphics cards via driver updates
- HDMI 1.0 and 1.1 permit 10 bpc and 12 bpc color depth only when Y′CBCR 4:2:2 color format is used. When using RGB or Y′CBCR 4:4:4, only 8 bpc color is permitted.(§6.5)
Refresh frequency limits for standard videoEdit
HDMI 1.0 and 1.1 are restricted to transmitting only certain video formats,(§6.1) defined in EIA/CEA-861-B and in the HDMI Specification itself.(§6.3) HDMI 1.2 and all later versions allow any arbitrary resolution and frame rate (within the bandwidth limit). Formats that are not supported by the HDMI Specification (i.e., no standardized timings defined) may be implemented as a vendor-specific format. Successive versions of the HDMI Specification continue to add support for additional formats (such as 4K resolutions), but the added support is to establish standardized timings to ensure interoperability between products, not to establish which formats are or aren't permitted. Video formats do not require explicit support from the HDMI Specification in order to be transmitted and displayed.(§6.1)
Individual products may have heavier limitations than those listed below, since HDMI devices are not required to support the maximum bandwidth of the HDMI version that they implement. Therefore, it is not guaranteed that a display will support the refresh rates listed in this table, even if the display has the required HDMI version.
Uncompressed 8 bpc (24 bit/px) color depth and RGB or Y′CBCR 4:4:4 color format are assumed on this table except where noted.
|Video Format||HDMI Version / Maximum Data Rate|
|3.96 Gbit/s||3.96 Gbit/s||8.16 Gbit/s||14.4 Gbit/s||42.6 Gbit/s|
|720p||1280 × 720||30||720 Mbit/s||Yes||Yes||Yes||Yes||Yes|
|1080p||1920 × 1080||30||1.58 Gbit/s||Yes||Yes||Yes||Yes||Yes|
|1440p||2560 × 1440||30||2.78 Gbit/s||No||Yes||Yes||Yes||Yes|
|4K||3840 × 2160||30||6.18 Gbit/s||No||No||Yes||Yes||Yes|
|5K||5120 × 2880||30||10.94 Gbit/s||No||No||4:2:2[b]||Yes||Yes|
|8K||7680 × 4320||30||24.48 Gbit/s||No||No||No||4:2:0[b]||Yes|
- Uncompressed 8 bpc (24 bit/px) color depth with RGB or Y′CBCR 4:4:4 color format and CVT-R2 timing are used to calculate these data rates. Uncompressed data rate for RGB images in bits per second is calculated as bits per pixel × pixels per frame × frames per second. Pixels per frame includes blanking intervals as defined by CVT-R2.
- Possible by using Y′CBCR with 4:2:2 or 4:2:0 subsampling (as noted)
- Possible by using Display Stream Compression (DSC)
Refresh frequency limits for HDR10 videoEdit
HDR10 requires 10 bpc (30 bit/px) color depth, which uses 25% more bandwidth than standard 8 bpc video.
Uncompressed 10 bpc color depth and RGB or Y′CBCR 4:4:4 color format are assumed on this table except where noted.
|Video Format||HDMI Version / Maximum Data Rate|
|14.4 Gbit/s||42.6 Gbit/s|
|1080p||1920 × 1080||60||4.00 Gbit/s||Yes||Yes|
|1440p||2560 × 1440||60||7.04 Gbit/s||Yes||Yes|
|4K||3840 × 2160||50||13.00 Gbit/s||Yes||Yes|
|5K||5120 × 2880||30||13.67 Gbit/s||Yes||Yes|
|8K||7680 × 4320||30||30.60 Gbit/s||No||Yes|
- Uncompressed 10 bpc (30 bit/px) color depth with RGB or Y′CBCR 4:4:4 color format and CVT-R2 timing are used to calculate these data rates. Uncompressed data rate for RGB images in bits per second is calculated as bits per pixel × pixels per frame × frames per second. Pixels per frame includes blanking intervals as defined by CVT-R2.
- Possible by using Y′CBCR with 4:2:2 or 4:2:0 subsampling (as noted)
- Possible by using Display Stream Compression (DSC)
|Full HD Blu-ray Disc and HD DVD video[a]||Yes||Yes||Yes||Yes||Yes||Yes||Yes|
|Consumer Electronic Control (CEC)[b]||Yes||Yes||Yes||Yes||Yes||Yes||Yes|
|Super Audio CD (DSD)[c]||No||No||Yes||Yes||Yes||Yes||Yes|
|Dolby TrueHD / DTS-HD Master Audio bitstream capable||No||No||No||Yes||Yes||Yes||Yes|
|Updated list of CEC commands[d]||No||No||No||Yes||Yes||Yes||Yes|
|Ethernet channel (100 Mbit/s)||No||No||No||No||Yes||Yes||Yes|
|Audio return channel (ARC)||No||No||No||No||Yes||Yes||Yes|
|4 audio streams||No||No||No||No||No||Yes||Yes|
|2 video streams (Dual View)||No||No||No||No||No||Yes||Yes|
|Perceptual Quantizer (PQ) HDR OETF (SMPTE ST 2084)||No||No||No||No||No||Yes||Yes|
|Hybrid Log-Gamma (HLG) HDR OETF||No||No||No||No||No||Yes||Yes|
|Static HDR metadata (SMPTE ST 2086)||No||No||No||No||No||Yes||Yes|
|Dynamic HDR metadata (SMPTE ST 2094)||No||No||No||No||No||No||Yes|
|Enhanced audio return channel (eARC)||No||No||No||No||No||No||Yes|
|Variable Refresh Rate (VRR)||No||No||No||No||No||No||Yes|
|Quick Media Switching (QMS)||No||No||No||No||No||No||Yes|
|Quick Frame Transport (QFT)||No||No||No||No||No||No||Yes|
|Auto Low Latency Mode (ALLM)||No||No||No||No||No||No||Yes|
|Display Stream Compression (DSC)||No||No||No||No||No||No||Yes|
- Even for a compressed audio codec that a given HDMI version cannot transport, the source device may be able to decode the audio codec and transmit the audio as uncompressed LPCM.
- CEC has been in the HDMI specification since version 1.0, but only began appear in consumer electronics products with HDMI version 1.3a.
- Playback of SACD may be possible for older HDMI versions if the source device (such as the Oppo 970) converts to LPCM.
- Large number of additions and clarifications for CEC commands. One addition is CEC command, allowing for volume control of an AV receiver.(§CEC-1.3)
Blu-ray Disc and HD DVD playersEdit
Blu-ray Disc and HD DVD, introduced in 2006, offer high-fidelity audio features that require HDMI for best results. HDMI 1.3 can transport Dolby Digital Plus, Dolby TrueHD, and DTS-HD Master Audio bitstreams in compressed form.(§7) This capability allows for an AV receiver with the necessary decoder to decode the compressed audio stream. The Blu-ray specification does not include video encoded with either deep color or xvYCC; thus, HDMI 1.0 can transfer Blu-ray discs at full video quality.
The HDMI 1.4 specification (released in 2009) added support for 3D video and is used by all Blu-ray 3D compatible players.
The Blu-ray Disc Association (BDA) spokespersons have stated (Sept. 2014 at IFA show in Berlin, Germany) that the Blu-ray, Ultra HD players, and 4K discs are expected to be available starting in the second half to 2015. It is anticipated that such Blu-ray UHD players will be required to include a HDMI 2.0 output that supports HDCP 2.2.
Blu-ray permits secondary audio decoding, whereby the disc content can tell the player to mix multiple audio sources together before final output. Some Blu-ray and HD DVD players can decode all of the audio codecs internally and can output LPCM audio over HDMI. Multichannel LPCM can be transported over an HDMI connection, and as long as the AV receiver implements multichannel LPCM audio over HDMI and implements HDCP, the audio reproduction is equal in resolution to HDMI 1.3 bitstream output. Some low-cost AV receivers, such as the Onkyo TX-SR506, do not allow audio processing over HDMI and are labelled as "HDMI pass through" devices. Virtually all modern AV Receivers now offer HDMI 1.4 inputs and outputs with processing for all of the audio formats offered by Blu-ray Discs and other HD video sources. During 2014 several manufacturers introduced premium AV Receivers that include one, or multiple, HDMI 2.0 inputs along with a HDMI 2.0 output(s). However, not until 2015 did most major manufacturers of AV receivers also support HDCP 2.2 as needed to support certain high quality UHD video sources, such as Blu-ray UHD players.
Digital cameras and camcordersEdit
As of 2012[update], most consumer camcorders, as well as many digital cameras, are equipped with a mini-HDMI connector (type C connector).
Although cameras capable of HD video often include an HDMI interface for playback or even live preview, the image processor and the video processor of cameras usable for uncompressed video must be able to deliver the full image resolution at the specified frame rate in real time without any missing frames causing jitter. Therefore, usable uncompressed video out of HDMI is often called "clean HDMI".
This section may require cleanup to meet Wikipedia's quality standards. The specific problem is: Lead is out-of-date, section reads likes a timeline (June 2019) (Learn how and when to remove this template message)
PCs with a DVI interface are capable of video output to an HDMI-enabled monitor.(appx. C) Some PCs include an HDMI interface and may also be capable of HDMI audio output, depending on specific hardware. For example, Intel's motherboard chipsets since the 945G and NVIDIA's GeForce 8200/8300 motherboard chipsets are capable of 8-channel LPCM output over HDMI. Eight-channel LPCM audio output over HDMI with a video card was first seen with the ATI Radeon HD 4850, which was released in June 2008 and is implemented by other video cards in the ATI Radeon HD 4000 series. Linux can drive 8-channel LPCM audio over HDMI if the video card has the necessary hardware and implements the Advanced Linux Sound Architecture (ALSA). The ATI Radeon HD 4000 series implements ALSA. Cyberlink announced in June 2008 that they would update their PowerDVD playback software to allow 192 kHz/24-bit Blu-ray Disc audio decoding in Q3-Q4 of 2008. Corel's WinDVD 9 Plus currently has 96 kHz/24-bit Blu-ray Disc audio decoding.
Even with an HDMI output, a computer may not be able to produce signals that implement HDCP, Microsoft's Protected Video Path, or Microsoft's Protected Audio Path. Several early graphic cards were labelled as "HDCP-enabled" but did not have the hardware needed for HDCP; this included some graphic cards based on the ATI X1600 chipset and certain models of the NVIDIA Geforce 7900 series. The first computer monitors that could process HDCP were released in 2005; by February 2006 a dozen different models had been released. The Protected Video Path was enabled in graphic cards that had HDCP capability, since it was required for output of Blu-ray Disc and HD DVD video. In comparison, the Protected Audio Path was required only if a lossless audio bitstream (such as Dolby TrueHD or DTS-HD MA) was output. Uncompressed LPCM audio, however, does not require a Protected Audio Path, and software programs such as PowerDVD and WinDVD can decode Dolby TrueHD and DTS-HD MA and output it as LPCM. A limitation is that if the computer does not implement a Protected Audio Path, the audio must be downsampled to 16-bit 48 kHz but can still output at up to 8 channels. No graphic cards were released in 2008 that implemented the Protected Audio Path.
The Asus Xonar HDAV1.3 became the first HDMI sound card that implemented the Protected Audio Path and could both bitstream and decode lossless audio (Dolby TrueHD and DTS-HD MA), although bitstreaming is only available if using the ArcSoft TotalMedia Theatre software. It has an HDMI 1.3 input/output, and Asus says that it can work with most video cards on the market.
"Leading PC Companies Move to All Digital Display Technology, Phasing out Analog". Intel. December 8, 2010. Retrieved September 14, 2012.
In September 2009, AMD announced the ATI Radeon HD 5000 series video cards, which have HDMI 1.3 output (deep color, xvYCC wide gamut capability and high bit rate audio), 8-channel LPCM over HDMI, and an integrated HD audio controller with a Protected Audio Path that allows bitstream output over HDMI for AAC, Dolby AC-3, Dolby TrueHD and DTS-HD Master Audio formats. The ATI Radeon HD 5870 released in September 2009 is the first video card that allows bitstream output over HDMI for Dolby TrueHD and DTS-HD Master Audio. The AMD Radeon HD 6000 Series implements HDMI 1.4a. The AMD Radeon HD 7000 Series implements HDMI 1.4b.
In December 2010, it was announced that several computer vendors and display makers including Intel, AMD, Dell, Lenovo, Samsung, and LG would stop using LVDS (actually, FPD-Link) from 2013 and legacy DVI and VGA connectors from 2015, replacing them with DisplayPort and HDMI.
On September 18, 2014, Nvidia launched GeForce GTX 980 and GTX 970 (with GM204 chip) with HDMI 2.0 support. On January 22, 2015, GeForce GTX 960 (with GM206 chip) launched with HDMI 2.0 support. On March 17, 2015, GeForce GTX TITAN X (GM200) launched with HDMI 2.0 support. On June 1, 2015, GeForce GTX 980 Ti (with GM200 chip) launched with HDMI 2.0 support. On August 20, 2015, GeForce GTX 950 (with GM206 chip) launched with HDMI 2.0 support.
On May 6, 2016, Nvidia launched the GeForce GTX 1080 (GP104 GPU) with HDMI 2.0b support.
Beginning with the seventh generation of video game consoles, most consoles support HDMI. Video game consoles that support HDMI include the Xbox 360 (1.2a), Xbox One (1.4b), Xbox One S (2.0a), Xbox One X (2.0b), PlayStation 3 (1.3a), PlayStation 4 (1.4b), PlayStation 4 Pro (2.0a), Wii U (1.4a), and Nintendo Switch (1.4b).
Some tablet computers, such as the Microsoft Surface, Motorola Xoom, BlackBerry PlayBook, Vizio Vtab1008 and Acer Iconia Tab A500, implement HDMI using Micro-HDMI (Type D) ports. Others, such as the ASUS Eee Pad Transformer implement the standard using mini-HDMI (type C) ports. All iPad models have a special A/V adapter that converts Apple's data line to a standard HDMI (Type A) port. Samsung has a similar proprietary thirty-pin port for their Galaxy Tab 10.1 that can adapt to HDMI as well as USB drives. The Dell Streak 5 smartphone/tablet hybrid is capable of outputting over HDMI. While the Streak uses a PDMI port, a separate cradle adds HDMI compatibility. Most Chinese-made tablets running Android OS provide HDMI output using a mini-HDMI (type C) port. Most new laptops and desktops now have built in HDMI as well.
Many recent mobile phones can produce an output of HDMI video via either a micro-HDMI connector or MHL output. Some older phones may use SlimPort to achieve a similar result.
HDMI can only be used with older analog-only devices (using connections such as SCART, VGA, RCA, etc.) by means of a digital-to-analog converter or AV receiver, as the interface does not carry any analog signals (unlike DVI, where devices with DVI-I ports accept or provide either digital or analog signals). Cables are available that contain the necessary electronics, but it is important to distinguish these active converter cables from passive HDMI to VGA cables (which are typically cheaper as they don't include any electronics). The passive cables are only useful if you have a device that is generating or expecting HDMI signals on a VGA connector, or VGA signals on an HDMI connector; this is a non-standard feature, not implemented by most devices.
HDMI Alternate Mode for USB Type-CEdit
The HDMI Alternate Mode for USB-C allows HDMI-enabled sources with a USB-C connector to directly connect to standard HDMI display devices, without requiring an adapter. The standard was released in September 2016, and supports all HDMI 1.4b features such as video resolutions up to Ultra HD 30 Hz, and Consumer Electronic Control (CEC). Previously, the similar DisplayPort Alternate Mode could be used to connect to HDMI displays from USB Type-C sources, but where in that case, active adapters were required to convert from DisplayPort to HDMI, HDMI Alternate Mode connects to the display natively.
The Alternate Mode reconfigures the four SuperSpeed differential pairs present in USB-C to carry the three HDMI TMDS channels and the clock signal. The two Sideband Use pins (SBU1 and SBU2) are used to carry the HDMI Ethernet and Audio Return Channel and the Hot Plug Detect functionality (HEAC+/Utility pin and HEAC−/HPD pin). As there are not enough reconfigurable pins remaining in USB-C to accommodate the DDC clock (SCL), DDC data (SDA), and CEC – these three signals are bridged between the HDMI source and sink via the USB Power Delivery 2.0 (USB-PD) protocol, and are carried over the USB-C Configuration Channel (CC) wire. This is possible because the cable is electronically marked (i.e., it contains a USB-PD node) that serves to tunnel the DDC and CEC from the source over the Configuration Channel to the node in the cable, these USB-PD messages are received and relayed to the HDMI sink as regenerated DDC (SCL and SDA signals), or CEC signals.
Relationship with DisplayPortEdit
The DisplayPort audio/video interface was introduced in May 2006. In recent years, DisplayPort connectors have become a common feature of premium products—displays, desktop computers, and video cards; most of the companies producing DisplayPort equipment are in the computer sector. The DisplayPort website states that DisplayPort is expected to complement HDMI, but as of 2016[update] 100% of HD and UHD TVs had HDMI connectivity. DisplayPort supported some advanced features which are useful for multimedia content creators and gamers (e.g. 5K, Adaptive-Sync), which was the reason most GPUs had DisplayPort. These features were added to the official HDMI specification slightly later, but with the introduction of HDMI 2.1, these gaps are already leveled off (with e.g. VRR / Variable Refresh Rate).
DisplayPort uses a self-clocking, micro-packet-based protocol that allows for a variable number of differential LVDS lanes as well as flexible allocation of bandwidth between audio and video, and allows encapsulating multi-channel compressed audio formats in the audio stream. DisplayPort 1.2 supports multiple audio/video streams, variable refresh rate (FreeSync), Display Stream Compression (DSC), and Dual-mode LVDS/TMDS transmitters compatible with HDMI 1.2 or 1.4. Revision 1.3 increases overall transmission bandwidth to 32.4 Gbit/s with the new HBR3 mode featuring 8.1 Gbit/s per lane; it requires Dual-mode with mandatory HDMI 2.0 compatibility and HDCP 2.2. Revision 1.4 adds support BT.2020 color space and HDR10 extensions from CTA-861.3, including static and dynamic metadata.
The DisplayPort connector is compatible with HDMI and can transmit single-link DVI and HDMI 1.2/1.4/2.0 signals using attached passive adapters or adapter cables. The source device includes a dual-mode transmitter that supports both LVDS signals for DisplayPort and TMDS signals for DVI/HDMI. The same external connector is used for both protocols – when a DVI/HDMI passive adapter is attached, the transmitter circuit switches to TMDS mode. DisplayPort Dual-mode ports and cables/adapters are typically marked with the DisplayPort++ logo. Thunderbolt ports with mDP connector also supports Dual-mode passive HDMI adapters/cables. Conversion to dual-link DVI and component video (VGA/YPbPr) requires active powered adapters.
The USB 3.1 Type-C connector is an emerging standard that replaces legacy video connectors such as mDP, Thunderbolt, HDMI, and VGA in mobile devices. USB-C connectors can transmit DisplayPort video to docks and displays using standard USB Type-C cables or Type-C to DisplayPort cables and adapters; USB-C also supports HDMI adapters that actively convert from DisplayPort to HDMI 1.4 or 2.0. DisplayPort Alternate Mode for USB Type-C specification was published in 2015. USB Type-C chipsets are not required to include Dual-mode transmitters and only support DisplayPort LVDS protocol, so passive DP-HDMI adapters do not work with Type-C sources.
DisplayPort has a royalty rate of US$0.20 per unit (from patents licensed by MPEG LA), while HDMI has an annual fee of US$10,000 and a per unit royalty rate of between $0.04 and $0.15.
HDMI has a few advantages over DisplayPort, such as ability to carry Consumer Electronics Control (CEC) signals, and electrical compatibility with DVI (though practically limited to single-link DVI rates). Also, HDMI can sustain full bandwidth for up to 10 meters of cable length and there are certification programs to ensure this; DisplayPort cables, conversely, don't ensure full bandwidth beyond 3 meters, however some active cables extend the distance to 15 meters at certain resolutions, and specialist optical extender solutions exists to extend distances even further by sending the signal over fiber optic cable.
Relationship with MHLEdit
Mobile High-Definition Link (MHL) is an adaptation of HDMI intended to connect mobile devices such as smartphones and tablets to high-definition televisions (HDTVs) and displays. Unlike DVI, which is compatible with HDMI using only passive cables and adapters, MHL requires that the HDMI socket be MHL-enabled, otherwise an active adapter (or dongle) is required to convert the signal to HDMI. MHL is developed by a consortium of five consumer electronics manufacturers, several of which are also behind HDMI.
MHL pares down the three TMDS channels in a standard HDMI connection to a single one running over any connector that provides at least five pins. This lets existing connectors in mobile devices – such as micro-USB – be used, avoiding the need for additional dedicated video output sockets. The USB port switches to MHL mode when it detects a compatible device is connected.
In addition to the features in common with HDMI (such as HDCP encrypted uncompressed high-definition video and eight-channel surround sound), MHL also adds the provision of power charging for the mobile device while in use, and also enables the TV remote to control it. Although support for these additional features requires connection to an MHL-enabled HDMI port, power charging can also be provided when using active MHL to HDMI adapters (connected to standard HDMI ports), provided there is a separate power connection to the adapter.
Like HDMI, MHL defines a USB-C Alternate Mode to support the MHL standard over USB-C connections.
Version 1.0 supported 720p/1080i 60 Hz (RGB/4:4:4 pixel encoding) with a bandwidth of 2.25 Gbit/s. Versions 1.3 and 2.0 added support for 1080p 60 Hz (Y′CBCR 4:2:2) with a bandwidth of 3 Gbit/s in PackedPixel mode. Version 3.0 increased the bandwidth to 6 Gbit/s to support Ultra HD (3840 × 2160) 30 Hz video, and also changed from being frame-based, like HDMI, to packet-based.
The fourth version, superMHL, increased bandwidth by operating over multiple TMDS differential pairs (up to a total of six) allowing a maximum of 36 Gbit/s. The six lanes are supported over a reversible 32-pin superMHL connector, while four lanes are supported over USB-C Alternate Mode (only a single lane is supported over micro-USB/HDMI). Display Stream Compression (DSC) is used to allow up to 8K Ultra HD (7680 × 4320) 120 Hz HDR video, and to support Ultra HD 60 Hz video over a single lane.
- "HDMI Adopters and Founders". HDMI. Retrieved April 14, 2015.
- "Members". HDMI Forum. Retrieved March 16, 2017.
- "HDMI :: Resources :: Knowledge Base". hdmi.org.
- "HDMI FAQ". HDMI.org. Retrieved July 9, 2007.
- CEA-861-D, A DTV Profile for Uncompressed High Speed Digital Interfaces, §1 Scope
- "High-Definition Multimedia Interface Specification 1.3a" (PDF). HDMI Licensing, LLC. November 10, 2006. Archived from the original (PDF) on March 5, 2016. Retrieved April 1, 2016 – via Microprocessor.org.
- "The First HDMI Consumer Electronics Products Debut at Cedia 2003". HDMI.org. September 5, 2003. Retrieved May 1, 2008.
- Samsung (February 24, 2006). "Samsung Camera Releases New High-Performance Digimax L85 Featuring World's First High Definition Multimedia Interface". dpreview.com. Retrieved July 1, 2008.
- "Canon's new feature-packed HV20 HD camcorder expands high definition camcorder capabilities and choices for consumers". Canon. January 31, 2007. Retrieved July 1, 2008.
- "HDMI Interface Extends Exceptional Digital Quality with Single-Cable Simplicity to Over 4 Billion Consumer Devices". HDMI Licensing, LLC. January 6, 2015. Retrieved August 15, 2016.
- "About DCP". Digital Content Protection LLC. Retrieved December 28, 2008.
- Rodolfo La Maestra (June 25, 2006). "HDMI – A Digital Interface Solution". HDTV Magazine. Archived from the original on May 30, 2016. Retrieved June 23, 2008.
- Michael Stelts (April 17, 2002). "HDMI – Presentation for the HDMI Working Group" (PDF). Copy Protection Technical Working Group. Archived from the original (PDF) on January 6, 2016. Retrieved June 23, 2008.
- Bob O'Donnell (December 2006). "White Paper – HDMI: The Digital Display Link" (PDF). Silicon Image. Archived from the original (PDF) on January 6, 2016. Retrieved June 23, 2008.
- Alen Koebel (February 2003). "DVI and HDMI: Digital A/V Interfaces for A New Age". Widescreen Review (69): 64. Retrieved June 24, 2008.
When HDCP is added to DVI, the result is often called "DVI+HDCP." When this is used on an HDTV, HD monitor or set-top box, a further standard is usually applied: IEA/CEA-861 (currently 861-B)...the interface is commonly known as DVI-HDTV.
- "Silicon Image Opens HDMI Authorized Testing Center". HDMI.org. June 26, 2003. Retrieved November 18, 2009.
- "Panasonic Equips Japanese HDMI Authorized Testing Center". Entrepreneur.com. May 1, 2004. Retrieved January 5, 2009.
- "Philips opens first Authorized Test Center in Europe for HDMI compliance testing". HDMI.org. May 25, 2005. Retrieved November 18, 2009.
- "Silicon Image Expands HDMI and PanelLink Cinema Testing Operations to China". HDMI.org. November 21, 2005. Retrieved November 18, 2009.
- "Philips Sets Up India's First HDMI Authorized Testing Center". HDMI.org. June 12, 2008. Retrieved January 5, 2009.
- "Authorized Test Centers". HDMI.org. Retrieved November 18, 2009.
- Brian O'Rourke (January 28, 2008). "In-Stat Reports DVI on the Decline as HDMI and DisplayPort Grow". Business Wire, Inc. Retrieved July 2, 2008.
- "HDMI Gaining as DVI Heads for a Slide". instat.com. January 30, 2006. Archived from the original on August 8, 2007. Retrieved July 2, 2008.
- "Silicon Image Inc – SIMG Annual Report". Edgar Online. March 1, 2007. Retrieved November 18, 2009.
- Jean-Pierre Evain (October 2007). "HDCP – the FTA broadcasters' perspective" (PDF). EBU Technical Review. Archived from the original (PDF) on October 9, 2009. Retrieved July 1, 2008.
- Brian Weatherhead (November 2004). "DVI and HDMI Connections and HDCP Explained". Secrets of Home Theater and High Fidelity. Retrieved July 1, 2008.
- Paul Mcgoldgrick (August 1, 2006). "The HDMI future". Secrets of Home Theater and High Fidelity. Archived from the original on November 13, 2007. Retrieved July 1, 2008.
- Evan Sun (November 8, 2007). "Testing your High Definition embedded devices using the HDMI Version 1.3 specification". Audio Design Line. Retrieved July 1, 2008.
- "Adopted by 750+ manufacturers, HDMI is a must-have for consumer electronics". HDMI.org. January 5, 2008. Retrieved July 2, 2008.
- "HDMI Licensing appoints Steve Venuti as new LLC President; HDMI Adoption continues to grow" (Press release). HDMI.org. April 8, 2008. Retrieved April 30, 2008.
- "HDMI Founders Look Toward the Future as they Win Emmy for Standard". HDMI.org. January 7, 2009. Retrieved November 18, 2009.
- ExtremeTech Staff (January 29, 2008). "Analyst: The DVI Interface is Dying". ExtremeTech. Archived from the original on May 13, 2014. Retrieved January 30, 2008.
- Eric Griffith; Jeremy A. Kaplan (October 22, 2008). "25th Annual Technical Excellence Awards: Home Theater". PC Magazine. Retrieved January 4, 2009.
- "Honorees announced for the 60th annual Technology and Engineering Emmy Awards" (PDF). National Academy of Television Arts and Sciences. October 27, 2008. Archived from the original (PDF) on December 30, 2008. Retrieved January 4, 2009.
- "HDMI Founders announce initiative to broaden industry participation in HDMI specification development". HDMI.org. October 25, 2011. Retrieved October 29, 2011.
- "Questions about the HDMI Forum". HDMIForum.org. Archived from the original on October 29, 2011. Retrieved October 30, 2011.
- "HDMI Specification Marks 10-Year Milestone as De-Facto Standard for HD Connectivity". Business Wire. January 8, 2013. Retrieved January 10, 2013.
- "HDMI 1.3 doubles bandwidth, delivers billions of colors for HDTVs". hdmi.org. HDMI Licensing, LLC. June 22, 2006. Archived from the original on February 22, 2008. Retrieved June 19, 2008.
- "Standards Details – CEA-861-E". Consumer Electronics Association. March 1, 2008. Archived from the original on November 7, 2011. Retrieved November 20, 2011.
- "CEA Announces Publication of New DTV Interface Standard". Business Wire. July 15, 2013. Retrieved July 17, 2013.
- "Audio Return Channel". HDMI Licensing, LLC. Retrieved October 7, 2011.
- Closed captions#HDTV interoperability issues
- "HDMI Ethernet Channel". HDMI Licensing, LLC. Retrieved October 7, 2011.
- Pulse-Eight USB CEC Adapter Review
- "The Secret Feature on Your HDTV: HDMI CEC". TechHive. March 26, 2008.
- "CEC White Paper" (PDF). www.quantumdata.com.
- "The USB-CEC Adapter is a look into the Future". xbmc. November 1, 2011. Archived from the original on November 26, 2011. Retrieved November 20, 2011.
- "USB – CEC Adapter". Pulse-Eight. Retrieved November 20, 2011.
- "Take control of your TV with your HTPC via HDMI-CEC". Engadget. August 25, 2011. Retrieved November 20, 2011.
- "HDMI-CEC to USB and RS-232 bridge/converter". RainShadow Technology. Retrieved November 20, 2011.
- "High-Definition Multimedia Interface Specification 1.4" (PDF). HDMI Licensing, LLC. June 5, 2009. Archived from the original (PDF) on March 5, 2017. Retrieved March 7, 2017 – via Microprocessor.org.
- "Archived copy". Archived from the original on November 5, 2014. Retrieved November 3, 2014.CS1 maint: archived copy as title (link)
- U.S. Patent 8,472,351 from 2013
- "Digital Content Protection FAQs". Digital Content Protection, LLC. Retrieved June 21, 2008.
- "The Best HDMI Splitter". The Geek Street. Retrieved November 29, 2019.
- "If I am using a DVI-to-HDMI cable will audio be transmitted over this cable to the 3D TV? – NVIDIA". nvidia.custhelp.com.
- "Retailer Requires 'Simplay' HDMI Testing". TWICE. December 11, 2006. Archived from the original on September 19, 2009. Retrieved November 18, 2009.
- "HDMI Compliance Testing Policies and Procedures" (PDF). HDMI.org. Retrieved May 4, 2008.
- "HDCP deciphered White Paper" (PDF). Digital Content Protection. July 8, 2008. Archived from the original (PDF) on September 20, 2008. Retrieved October 23, 2008.
- Ryan Block (July 21, 2005). "The Clicker: HDCP's Shiny Red Button". Engadget. Retrieved December 20, 2008.
- Rodolfo La Maestra (August 22, 2006). "HDMI – A Digital Interface Solution" (PDF). HDTV Magazine. Archived from the original (PDF) on January 6, 2016. Retrieved June 23, 2008.
- "HDMI 1.4 FAQ". HDMI.org. Retrieved November 20, 2009.
- "HDMI Licensing, LLC Announces Features of the Upcoming HDMI Specification Version 1.4". HDMI Licensing, LLC. May 28, 2009. Retrieved May 28, 2009.
- "Ultra-Small HDMI Revealed: Same 19 Pins in Half the Size". Nikkei Electronics Asia. May 8, 2009. Archived from the original on September 11, 2011. Retrieved November 20, 2009.
- "HDMI Specification 1.4" (PDF). HDMI Licensing, LLC. June 5, 2009. Archived from the original (PDF) on August 11, 2017. Retrieved August 11, 2017.
- Micro-HDMI (type D) pinout
- "Automotive Connection System". HDMI Licensing, LLC. Retrieved August 6, 2012.
- "Automotive Use HDMI Type E Connector "MX50/53 Series" Has Been Developed". Japan Aviation Electronics Industry, Ltd. February 15, 2012. Archived from the original on February 8, 2013. Retrieved August 6, 2012.
- "HDMI :: Manufacturer :: HDMI Alt Mode for USB Type-C Connector". www.hdmi.org. Retrieved September 18, 2016.
- "Does length matter?". Sound & Vision. February 2007. Retrieved June 19, 2008.
5 meters (about 16 feet) can be manufactured easily... Higher-quality can reach 12 to 15 meters... fiber-optic or dual Cat-5 can extend to 100 meters or more
- "Bigfoot Cables FAQ". Bigfoot Cables. October 2012. Archived from the original on January 18, 2013. Retrieved October 25, 2012.
cables can be as long as 10–15 metres, but extra precautions and standards must be followed during the manufacturing process
- "How Long Can HDMI Cable Be Run?". Blue Jeans Cable. July 2016. Retrieved July 29, 2016.
The longest HDMI cable we have ever seen a compliance test certificate for is our own Series-1, which passed ATC testing at 45 feet under HDMI 1.3a (CTS 1.3b1).
- "4K × 2K Video Support". HDMI.org. Retrieved September 20, 2009.
- "Trademark and Logo Guidelines In Effect 10/17/2008". HDMI.org. October 1, 2008. Retrieved November 17, 2009.
- "Updated Trademark and Logo Usage Guidelines". HDMI.org. Retrieved November 18, 2009.
- "HDMI Knowledge Base". HDMI.org. Archived from the original on April 26, 2009. Retrieved June 19, 2008.
- "Manufacturer :: HDMI 1.4 :: Finding the Right Cable". HDMI. Retrieved January 12, 2011.
- "3D HDTV and HDMI Explained". Hdguru.Com. February 22, 2010. Retrieved January 12, 2011.
- "HDMI Licensing, LLC Launches Premium HDMI Cable Certification Program". hdmi.org. HDMI Licensing, LLC. October 5, 2015.
- "Premium HDMI Cable Certification Program". hdmi.org. HDMI Licensing, LLC. October 5, 2015. Retrieved December 10, 2016.
- "HDMI 2.1 Press Release". HDMI Forum, Inc (Press release). hdmi.org. January 4, 2017. Retrieved January 10, 2017.
- "HDMI 2.1 Overview". HDMI Forum, Inc. hdmi.org. January 4, 2017. Retrieved January 10, 2017.
- "Running Long Cable Lengths". HDMI. Retrieved June 19, 2008.
- "Model XCAT-250 Operation Manual" (PDF). Extenhd. August 20, 2007. Archived from the original (PDF) on September 30, 2009. Retrieved May 13, 2009.
- "F1 HDMI over Fiber Extender". Xreo. Archived from the original (PDF) on January 6, 2016. Retrieved May 13, 2009.
- "HDCP License Agreement" (PDF). Digital Content Protection, LLC. January 16, 2008. Archived from the original (PDF) on April 19, 2009. Retrieved November 18, 2009.
- "Digital Millennium Copyright Act". U.S. Copyright Office. October 28, 1998. Retrieved June 23, 2008.
- Jain, Kavitha. "What are the Licensing Costs Associated with HDMI?". semiconductorstore.com. Symmetry Electronics. Retrieved May 2, 2018.
- "HDMI Adopter Terms". HDMI. Archived from the original on December 18, 2008. Retrieved June 23, 2008.
- "HDMI cable version numbers". Selby Acoustics. Retrieved December 12, 2013.
- Steve Venuti (December 2007). "Home Toys Interview December 2007". hometoys. Retrieved June 21, 2008.
- "Transformation is Sony's CES theme". Sony. January 7, 2007. Retrieved June 19, 2008.
- "Version numbers to be banned on HDMI cables".
- "Adopted Trademark and Logo Usage Guidelines" (PDF). HDMI Licensing, LLC. November 18, 2009. p. 7. Retrieved May 31, 2010.
- "HDMI Specification Informational Version 1.0" (PDF). HDMI Licensing, LLC. Archived from the original (PDF) on August 26, 2017. Retrieved August 25, 2017.
- "HDMI Specification Version 1.2a" (PDF). HDMI Licensing, LLC. Archived from the original (PDF) on August 26, 2017. Retrieved August 25, 2017.
- Joseph Palenchar (June 19, 2006). "HDMI 1.3 Connections Due By Year End". TWICE. Archived from the original on November 10, 2009. Retrieved November 18, 2009.
- "HDMI Part 5 – Audio in HDMI Versions". HDTVMagazine.com. August 8, 2006. Archived from the original on May 12, 2008. Retrieved August 2, 2007.
- Matt Burns (June 28, 2006). "Pics of the HDMI-mini connector". engadgetHD. Retrieved November 18, 2009.
- "Silicon Image introduces First Products Incorporating HDMI 1.4 Features for DTV and Home Theatre Applications". Silicon Image. June 22, 2009. Retrieved November 17, 2009.
- ""Introducing HDMI Specification Version 1.4a"". Archived from the original on March 3, 2019.
- "Introducing HDMI 1.4". HDMI. Retrieved July 1, 2009.
- "3D". HDMI. Retrieved April 28, 2011.
- "4K Support". HDMI. Retrieved April 28, 2011.
- "Introducing HDMI 1.4 Specification Features" (PDF). HDMI. Retrieved April 28, 2011.
- "Launch of HDMI 1.4 Specification" (PDF). HDMI.org. October 6, 2009. Retrieved November 16, 2009.
- "An Update from HDMI Licensing, LLC" (PDF). DisplayBlog. September 18, 2009. Archived from the original (PDF) on May 12, 2011. Retrieved November 16, 2009.
- "HDMI Licensing, LLC Releases HDMI Specification Version 1.4a". HDMI.org. HDMI Licensing, LLC. March 4, 2010. Retrieved August 25, 2017.
- Arlen Schweiger (March 5, 2010). "HDMI 1.4a Spec Addresses Broadcast 3D". Electronic House. Retrieved March 8, 2010.
- "10/11/2011 – HDMI Specification 1.4b and CTS 1.4b Available via Adopter Extranet". HDMI.org. October 11, 2011. Retrieved October 30, 2011.
- "Questions about the current version and the next version of the HDMI Specification". HDMIForum.org. Archived from the original on October 29, 2011. Retrieved October 30, 2011.
- "HDMI Forum Releases Version 2.0 of the HDMI Specification". HDMI.org. HDMI Licensing, LLC. September 4, 2013. Retrieved August 25, 2017.
- "High-Definition Multimedia Interface Specification 2.0" (PDF). HDMI Forum. September 4, 2013. Archived from the original (PDF) on May 27, 2019. Retrieved December 9, 2017.
- "FAQ for HDMI 2.0". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- Ganesh T S (January 8, 2013). "Broadcom Unveils 4Kp60-capable BCM7445 SoC for Home Gateways (STBs)". Anandtech. Retrieved April 24, 2013.
- "CES: Consortiums address home streaming challenges". Variety. January 9, 2013. Retrieved April 24, 2013.
- "Introducing HDMI 2.0". HDMI.org. Retrieved September 4, 2013.[non-primary source needed]
- "HDMI 2.0a Spec Released, HDR Capability Added". Twice. April 8, 2015. Retrieved April 8, 2015.
- "Snapshot of HDMI.org 2.0 overview page immediately prior to being updated to 2.0b". The Wayback Machine. March 5, 2016. Archived from the original on March 5, 2016. Retrieved December 6, 2016.
- Ramus Larsen (December 12, 2016). "HDMI 2.0b standard gets support for HLG HDR". flatpanelshd. Retrieved January 7, 2017.
- Andrew Cotton (December 31, 2016). "2016 in Review - High Dynamic Range". BBC. Retrieved January 7, 2017.
- "HDMI :: Press Release". www.hdmi.org. November 28, 2017. Retrieved November 28, 2017.
- Anton Shilov (January 5, 2017). "HDMI 2.1 Announced". Anandtech. Retrieved January 10, 2017.
- "HDMI 2.1: The Need For Speed Continues". HDTV Magazine, Ltd. HDTV Expert. January 18, 2017. Archived from the original on August 26, 2017. Retrieved January 31, 2017.
- "HDMI 2.1 To Bring Robust Home Theater Experience". HD Guru. January 19, 2017. Retrieved January 31, 2017.
- "edid-decode.git - edid-decode main repository". git.linuxtv.org. Retrieved April 2, 2020.
- "HDMI 2.1 Explained | Everything You Need To Know". Digital Trends. March 7, 2020. Retrieved April 3, 2020.
- "High-Definition Multimedia Interface Provides Access to Higher-Quality Digital Content". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- "HDMI LICENSING, LLC ANNOUNCES AVAILABILITY OF HDMI 1.2 SPECIFICATION". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- "HDMI LICENSING, LLC ANNOUNCES AVAILABILITY OF HDMI 1.2a SPECIFICATION INCLUDING UPDATED COMPLIANCE TEST SPECIFICATION". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- "HDMI 1.3 DOUBLES BANDWIDTH, DELIVERS BILLIONS OF COLORS FOR HDTVs". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- "HDMI Licensing, LLC Releases HDMI Specification Version 1.4". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- "HDMI Forum, Inc. Releases 2.0a Specification". HDMI.org. HDMI Licensing, LLC. Retrieved August 25, 2017.
- "HDMI Forum Releases Version 2.1 of the HDMI Specification". HDMI.org. HDMI Licensing, LLC. Retrieved November 28, 2017.
- "HDMI 2.1 Announced: Supports 8Kp60, Dynamic HDR, New Color Spaces, New 48G Cable". Anandtech. Retrieved August 25, 2017.
- "NVIDIA Kepler Cards Get HDMI 4K@60Hz Support (Kind Of)". Anandtech. Retrieved January 30, 2018.
- Julie Jacobson (January 17, 2007). "Panasonic Demos Control over HDMI". CEPro. Retrieved December 7, 2008.
- Jeff Boccaccio (December 28, 2007). "Inside HDMI CEC: The Little-Known Control Feature". CEPro. Retrieved December 7, 2008.
- "DV-970HD". Oppo Digital. Archived from the original on July 2, 2008. Retrieved December 7, 2008.
- "HDMI 2.0" (PDF). www.hdmi.org.
- "HDMI 101". Home Theater Magazine. March 1, 2009. Archived from the original on March 26, 2009. Retrieved March 22, 2009.
- Zyber, Joshua (November 23, 2007). "High-Def FAQ: Blu-ray Profiles Explained". highdefdigest.com. Retrieved June 21, 2008.
- Don Lindich (December 23, 2006). "Sound Advice: Best receiver flying under his radar". post-gazette now. Retrieved June 30, 2008.
- "TX-SR506". Onkyo. Archived from the original on June 30, 2008. Retrieved June 21, 2008.
- Mike Tomkins and Dave Etchells. "Panasonic Lumix FZ1000 Review". Retrieved January 31, 2015.
- Northup, Tony (2013). Tony Northrup's Photography Buying Guide: How to Choose a Camera, Lens, Tripod, Flash, & More. Mason Press. ISBN 978-0988263420.
- Aaron Brezenski (April 28, 2008). "HDMI Audio: Intel's Biggest Little Secret In Home Theater PCs". Intel Software Blogs. Archived from the original on April 15, 2010. Retrieved November 18, 2009.
- Anand Lal Shimpi (September 17, 2008). "Understanding 8-channel LPCM over HDMI: Why it Matters and Who Supports it". www.anandtech.com. Retrieved October 17, 2008.
- "ATI Radeon HD 4550 and ATI Radeon HD 4350 Graphics Cards Load Up Compelling Gaming and Multimedia Features". BusinessWire. September 30, 2008. Retrieved November 18, 2009.
- "ATI Radeon HD 4800 Series – GPU Specifications". AMD. Archived from the original on December 1, 2008. Retrieved October 22, 2008.
- "ATI Radeon HD 4600 Series – GPU Specifications". AMD. Archived from the original on September 18, 2008. Retrieved October 22, 2008.
- "ATI Radeon HD 4350 Graphics – GPU Specifications". AMD. Archived from the original on October 3, 2008. Retrieved October 22, 2008.
- Michael Larabel (February 15, 2008). "ATI R700 Series Gain ALSA HDMI Audio". Phoronix. Retrieved October 22, 2008.
- Michael Larabel (August 7, 2008). "Sapphire Radeon HD 4850 Toxic 512MB". Phoronix. Retrieved October 22, 2008.
- "CyberLink Partners with Realtek to Showcase Lossless HD Audio Playback with Copy Protection Technology". Cyberlink. June 5, 2008. Retrieved January 11, 2009.
- "WinDVD 9 Plus". Corel. Retrieved January 20, 2009.
- Marsh, Dave (January 10, 2009). "How to Implement Windows Vista Content Output Protection" (PowerPoint). Retrieved November 20, 2009.
- Paul Monckton (September 20, 2006). "The HDCP chain". www.pcw.co.uk. Retrieved January 10, 2009.
- Peter Rojas (October 4, 2005). "Gateway's FPD2185W 21-inch (530 mm) widescreen LCD". engadget. Retrieved May 9, 2008.
- Alan Dang (February 19, 2006). "Windows Vista Ready LCD Monitor Round-Up – Part 1". FiringSquad. Retrieved May 9, 2008.
- "Revolutionary HDMI Soundcard Unlocks Premium High Definition Multimedia". Asus. June 4, 2008. Archived from the original on August 22, 2008. Retrieved January 10, 2009.
- "ASUS Reveals Xonar HDAV1.3 Series Sound Cards with World's First Dolby TrueHD Bit-Stream Feature for the New Blu-ray Era". Asus. December 31, 2008. Retrieved November 17, 2009.
- "Xonar HDAV1.3: Specifications". Asus. Retrieved November 18, 2009.
- "ATI Radeon HD 5870 GPU Feature Summary". AMD. Retrieved October 7, 2009.
- "ATI Radeon HD 5850 GPU Feature Summary". AMD. Retrieved October 7, 2009.
- "AMD's Radeon HD 5870: Bringing About the Next Generation Of GPUs: The Race is Over: 8-channel LPCM, TrueHD & DTS-HD MA Bitstreaming". Anandtech. September 23, 2009. Retrieved October 7, 2009.
- "Welcome to AMD – Processors – Graphics and Technology" (PDF). AMD. Archived from the original (PDF) on June 20, 2012.
- technewsworld.com – VGA Given 5 Years to Live (9. December 2010)
- Hachman, Mark (January 1, 1970). "Top PC, Chip, Display Makers to Ditch VGA, DVI | News & Opinion". PCMag.com. Retrieved January 12, 2011.
- "ASUS Launches the PB278Q WQHD Display". asus.com. August 27, 2012. Retrieved August 29, 2012.
- "Asus PB278Q". asus.com. August 28, 2012. Retrieved August 28, 2012.
- "GeForce GTX 1080 Graphics Cards from NVIDIA GeForce". NVIDIA.
- "Samsung Galaxy S II first with MHL port for dual-purpose USB or HDMI out (video)". Engadget. February 23, 2011. Retrieved October 30, 2011.
- "Battlemodo: HTC EVO 3D Vs LG Optimus 3D". Gizmodo. September 28, 2011. Retrieved October 30, 2011.
- "LG Thrill for AT&T: First Look". PCWorld. April 22, 2011. Retrieved October 30, 2011.
- "Silicon Image's Dual-Mode Port Processors Now Offer MHL Connectivity for Samsung Smart TVs". Silicon Image. October 25, 2011. Retrieved October 30, 2011.
- Brian Klug (July 1, 2011). "HTC Sensation 4G Review – A Sensational Smartphone". Anandtech. Retrieved October 30, 2011.
- Dilger, Daniel Eran (March 2, 2011). "Apple brings HDMI output to iPhone 4, iPad, iPad 2". AppleInsider. Retrieved January 4, 2012.
- "Apple Digital AV Adapter". Apple Store – United States. Apple Inc. Archived from the original on January 11, 2012. Retrieved January 4, 2012.
- "HDMI Over USB Type-C" (PDF). usb.org. HDMI LLC. October 20, 2016. Archived from the original (PDF) on February 18, 2017. Retrieved May 6, 2017.
- "HDMI Licensing, LLC Releases Alternate Mode for USB Type-C Connector". hdmi.org (Press release). September 1, 2016. Archived from the original on December 24, 2018. Retrieved September 11, 2016.
- "New USB Type-C to HDMI spec lets you ditch the dongle". Ars Technica. September 5, 2016. Retrieved May 5, 2017.
- "Is Displayport worth its price – Displays". Tom's Hardware. Retrieved October 30, 2017.
- "DisplayPort FAQ". DisplayPort website. Archived from the original on June 3, 2008. Retrieved June 19, 2008.
- "Page 5, HDMI Penetration and Market Position 2016" (PDF). HDMI Licensing, LLC.
- "DisplayPort Technical Overview, May 2010" (PDF). VESA. May 23, 2010. Archived from the original (PDF) on July 26, 2011.
- "DisplayPort Technical Overview". DisplayPort website. Archived from the original on June 3, 2008. Retrieved May 23, 2009.
- "DisplayPort Developer Conference Presentations Posted". vesa. December 2, 2010. Retrieved January 12, 2011.
- Tony Hoffman (January 7, 2010). "VESA Upgrades DisplayPort Interface". PCMag. Retrieved May 31, 2010.
- "VESA Releases DisplayPort 1.3 Standard: 50% More Bandwidth, New Features". September 16, 2014. Retrieved September 15, 2016.
- "VESA Releases DisplayPort 1.3 Standard". vesa.org. Retrieved January 27, 2016.
- "VESA Updates Display Stream Compression Standard to Support New Applications and Richer Display Content". PRNewswire. January 27, 2016. Retrieved January 29, 2016.
- "DisplayPort Interoperability Guideline Version 1.1a". VESA.org. February 5, 2009. Retrieved July 2, 2010.
- "MPEG LA Introduces License for DisplayPort". Business Wire. March 5, 2015. Retrieved March 5, 2015.
- "DisplayPort 1.1a Standard". VESA.org. January 11, 2008. Retrieved June 23, 2008.
- "How to Choose a DisplayPort Cable, and Not Get a Bad One!". displayport.org. VESA.
- "StarTech – 15m Active DisplayPort Cable – DP to DP M/M". StarTech.com. StarTech. Retrieved December 14, 2015.
- "Lindy – 200m Fibre Optic DisplayPort 1.2 Extender". Lindy.com. Lindy. Retrieved December 14, 2015.
- "HDMI plugs into cameras, cellphones". EE Times. January 8, 2008. Archived from the original on June 13, 2012. Retrieved January 2, 2013.
- Manmeet Walia. "MHL: The New Mobile-to-TV Protocol". Synopsys.com. Retrieved February 15, 2017.
- "Consortium backs mobile interface for high def video". EE Times. April 14, 2010. Archived from the original on March 21, 2011. Retrieved January 2, 2013.
- "Frequently Asked Questions About MHL". MHL, LLC. Archived from the original on April 16, 2012. Retrieved January 2, 2013.
- Manmeet Walia. "HDMI and MHL IP for Mobile and Digital Home Connectivity". Synopsys.com. Retrieved April 14, 2017.
- "superMHL Specification – White Paper" (PDF). MHL. September 2015. Archived from the original (PDF) on February 8, 2017. Retrieved February 7, 2017.
|Wikimedia Commons has media related to High-Definition Multimedia Interface.|
- HDMI Licensing, LLC.
- Dolby Podcast Episode 60 – March 26, 2009 – Part one of a two-part discussion with Steve Venuti, President, and Jeff Park, Technology Evangelist, of HDMI Licensing.
- Dolby Podcast Episode 62 – April 23, 2009 – Part two of a two-part discussion with Steve Venuti, President, and Jeff Park, Technology Evangelist, of HDMI Licensing.