Fundamentals of Multimedia by Ze-Nian Li Mark S. Drew & Jiangchuan Liu
Author:Ze-Nian Li, Mark S. Drew & Jiangchuan Liu
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham
11.4.4 MPEG-4 Parts, Profiles and Levels
So far, MPEG-4 has over 28 Parts [9], and more are still being developed. It not only specified Visual in Part 2 and Audio in Part 3, but also specialized subjects such as Graphics, Animation, Music, Scene description, Object descriptor, Delivery Multimedia Integration Framework (DMIF), Streaming, and Intellectual Property Management and Protection (IPMP) in various Parts. MPEG-4 Part 10 is about Advanced Video Coding (AVC) which is identical to ITU-T H.264 AVC.
MPEG-4 Part 2 defined more than 20 visual Profiles, e.g., Simple, Advanced Simple, Core, Main, Simple Studio, etc. The commonly used ones are: Simple Profile (SP) and Advanced Simple Profile (ASP). The latter is adopted by several popular video coding software such as DivX, Nero Digital, and Quicktime 6. The Open-source software Xvid supports both SP and ASP.
To target for various applications, MPEG-4 Part 2 also defined multiple Levels in each profile, e.g., L0 to L3 for SP, and L0 to L5 for ASP. In general, the lower Levels in these profiles support low-bitrate video formats (CIF, QCIF) and applications such as videoconferencing on the web; whereas the higher Levels support higher quality videos.
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