8.2. Coding of Rectangular Video Objects
In MPEG-4 video coding, two main coding modes are distinguished: the coding of rectangular video objects and the coding of arbitrarily shaped video objects. In this section, the coding of rectangular video objects is described.
In principle, a rectangular video object is identical to a frame that is used in well-known video coding standards such as MPEG-1 and MPEG-2 [MPEG1-2, MPEG2-2, HaPN96], H.261 and H.263 [H261, H263, Rijk96]. Also, the coding principle of rectangular MPEG-4 video coding is the same as in these standards—namely, motion-compensated block-based hybrid coding. However, some significant improvements have been introduced by applying new tools or improving known algorithms. Therefore, this ...
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