Image coding
MPEG-4: basic coding
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Image coding
MPEG-4: basic coding

Authors : Jean-Noël GOUYET, Francis MAHIEU

Publication date: February 10, 2006 | Lire en français

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2. Image coding

This section successively presents the techniques for coding video images, still images and textures, as well as computer-generated visual objects.

2.1 MPEG video coding and MPEG-4 enhancements

In the content of a video sequence, there are several types of information: recurring, predictable and unpredictable. Information that recurs or can be predicted is redundant information. Video bitrate reduction, or video coding, takes advantage of various aspects of this information redundancy.

  • This redundancy is spatial in large areas of the image where pixels have approximately the same value (cf. example of a uniform area in figure

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