Talk:Optical storage media writing and reading speed

Exponential...

" In order to represent this exponential growth in drive speeds, manufacturers used the symbol nX, whereby n is the multiple of the original speed. "

Whoever wrote this didn't know what "exponential" means. Using a constant multiplicative factor (x*n) does not make a substantial difference when representing a quantity that grows exponentially (x^n).

130.225.247.82 (talk) 03:10, 23 December 2016 (UTC) Jacobo.

Better name?

The title seems a little, er, lame. It is a bit like v (version) because some programs prefix "v" to a program to indicate version (i.e. Program v0.99b). I think it should really be located at data writing speed and generalised across multiple media such as hard drives, or something. x42bn6 Talk Mess 16:04, 8 September 2007 (UTC)

Well, I agree that the content is directly related to data writing speed. However, it is the "X" that I wanted an article about. I wrote the article in the first step, to address that, then added some parts like that about choosing the best writing speed, etc. huji—TALK 21:04, 8 September 2007 (UTC)

I agree with x42bn6 that a different article title would be better. If you move the article to the new title, any link to the old title will still work as a redirect. This is probably a good thing to have, so you can still make links like "56[[X (writing speed)|]]" (see Help:Pipe trick) — but as a stand-alone title, it doesn't make a lot of sense, unless you already know what the article is about. - dcljr (talk) 02:36, 11 September 2007 (UTC)

It's not the letter X, but rather the multiplication sign ×. It is used to denote multiples of the standard speed of a CD/DVD/what-have-you — it is not some mysterious unit. Using lowercase or uppercase X is widespread, even amongst the highly literate. Similar to i.e. "(C)" and "--" in stead of "©" and "—". rdancer (talk) 16:11, 7 April 2009 (UTC)

speed

Hi there. If anyone know please add the folloswing data to the main article. The 1x CD speed refers to data-speed that is transffered of the CD when playing audio content (in CDA format). The audio tracks on the CD-Audio are played back using 176kbps stream. By doing the maths for a 80min-CD, the burning done at 1x speed it takes 80mins, and if burnt at 2x speed it takes 40mins. 80mins x 44.100 kHz x 2channels x 16bitsample = 80 x 60 x 44.1 x 2 x 16 = 6773760 kb x 1000 = 807.4951 MB total size of a disc, which 700MB have to be writable. + :Please tell me this: how did they choose the 1x speed on DVDs? Is it another speed not 1x the reference speed? 188.25.28.125 (talk) 19:30, 18 May 2010 (UTC) Also would be great to answer following: how was it the 1x speed for DVDs settled? Is it another speed not 1x the reference speed? What was it to be read at 35 mbps, and how does it fit 120min and not 180min as the old VHS-tapes Paul188.25.52.126 (talk) 22:51, 30 July 2010 (UTC)

Calculations

In summary 1xBlue-ray is about 20xDVD (4500/1380) and about 30xCD (4500/150) speed. 1xDVD equals 9.2xCD (1380/150).--92.227.38.223 (talk) 17:20, 20 March 2009 (UTC)

Hi there. If anyone know please add the following data to the main article. The 1x CD speed refers to data-speed that is transfered off the CD when playing audio content (in CDA format). The audio tracks on the CD-Audio are played back using 176kbps stream. By doing the maths for a 80min-CD, the burning done at 1x speed it takes 80mins, and if burnt at 2x speed it takes 40mins.

80mins x 44.100 kHz x 2channels x 16bitsample = 80 x 60 x 44.1 x 2 x 16 = 6773760 kb x 1000 = 807.4951 MB total size of a disc, which 700MB have to be writable.

Please tell me this: how did they choose the 1x speed on DVDs? Is it another speed not 1x the reference speed? 188.25.28.125 (talk) 19:30, 18 May 2010 (UTC)

Data

I was hoping this page would discuss data location on the disc. I have always wondered if write speed affected where data was placed on a disc. Or if is was always placed sequentially like the groove in a records no matter the write speed. Bluesubaru (talk) 16:02, 9 May 2010 (UTC)

Audio CDs use CLV - constant linear velocity, this means the disc slows down on the inside and speeds up when the outside tracks is being read, to maintain the same 'length' of data per angle.... See these articles http://en.wikipedia.org/wiki/Constant_linear_velocity http://en.wikipedia.org/wiki/Constant_angular_velocity 82.19.214.90 (talk) 17:26, 2 May 2013 (UTC)

Move to something like "Optical Disc writing speed"

yeah? Impasse 23:10, 18 October 2017 (UTC) — Preceding unsigned comment added by Impasse (talk • contribs)

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