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Chapter 8. Natural Video Coding > Coding of Rectangular Video Objects

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 section describes the root coding algorithm only briefly, and concentrates on the new tools and algorithms introduced by MPEG-4 Visual [MPEG4-2].


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