The term intra-frame coding refers to the fact that the various lossless and lossy compression techniques are performed relative to information that is contained only within the current frame, and not relative to any other frame in the video sequence. In other words, no temporal processing is performed outside of the current picture or frame. Non-intra coding techniques are extensions to these basics. It turns out that this block diagram is very similar to that of a JPEG still image video encoder, with only slight implementation detail differences.
Data is usually read from a video camera or a video card in the YCbCr data format (often wrongly marked as YUV, which should be used for analog data only). The coding process varies greatly depending on which encoder is used (e.g.: JPEG, H.264), but the most common steps usually include: partitioning into macroblocks, transform (e.g.: DCT, or wavelet), quantization and entropy encoding.
Intra-frame coding is applied to the partitioning into macroblocks step.
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