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MPEG-4 Book, The by Touradj Ebrahimi, Fernando Pereira

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A.4. Definition of Levels for Synthetic and Natural Hybrid Profiles

The levels for the profiles supporting both video object types and synthetic visual object types are specified by giving bounds for the natural objects and for the synthetic objects. Parameters such as bit rate can be combined across natural and synthetic objects.

A.4.1. Basic Animated Texture Profile

The Basic Animated Texture profile has two levels.

Level 1

Equivalent to Simple Facial Animation@L1 + Scalable Texture@L1 + the following restrictions on Basic Animated Texture objects

  1. Maximum number of mesh objects (with uniform topology): 4

  2. Maximum total number of nodes (vertices) in mesh objects: 480 (equivalent to 4 times the number of nodes of a uniform mesh covering a QCIF ...

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