12
The MPEG-4 Part 2 Codec
12.1 MPEG-4
The evolution of the video-compression systems designed by MPEG continues with MPEG-4. Some people assume that MPEG-4 is just another video codec, but it is much more than that. It includes a lot of multimedia capabilities for delivering a variety of audio–visual experiences as well as interactive support.
There are two video-coding standards included in MPEG-4 (part 2 and part 10). Up to the end of 2003, when people referred to MPEG-4 video, they were generally talking about MPEG-4 part 2, which describes the visual content.
Today it is too ambiguous just to say, “I am coding my video in MPEG-4.” You must qualify that by specifying the following:
• Which version (1, 2, 3, 4, or another version)
• Which ...
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