Intra-frame coding: Difference between revisions

Revision as of 02:43, 23 March 2009

Revision as of 10:11, 10 May 2009

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== Coding process ==

Data are usually read from videocamera or videocard as [[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|JPEG]], [[H.264/MPEG-4 AVC|H.264]]), but the most common steps usually include: partitioning into [[Macroblock|macroblocks]], transform (e.g.: [[Discrete cosine transform|DCT]], or [[Discrete wavelet transform|wavelet]]), [[Quantization_(image_processing)|quantization]] and [[Entropy encoding|entropy encoding]].

Intra-frame coding is applied to the partitioning into macroblocks step.