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Chapter 9. Visual SNHC Tools > Profiles and Levels

9.6. Profiles and Levels

MPEG-4 is a toolbox standard, in which subsets of tools can be specified as object types and after profiles for different applications. Moreover, levels will define constraints associated to relevant parameters, building together the conformance points as profile@level combinations (see Chapter 13). There are four visual profiles defined including synthetic visual tools (i.e., object types defined using synthetic visual coding tools):

  • Simple face animation profile: Using the FAPs, it is designed to animate a face model suitable for applications such as audiovisual presentations with an animated face.

  • Simple FBA profile: This profile is an extension to the Simple face animation profile to include body animation capabilities and thus allow more complex applications including the animation of humanlike models.

  • Basic animated texture profile: This allows the combination of facial animation objects with scalable still textures using the visual texture coding (VTC) tool described in Chapter 8, 2D meshes with uniform triangulation, and arbitrarily shaped textures.

  • Hybrid profile: This supports both natural and synthetic visual object types targeting content-rich media applications including arbitrarily shaped video objects, scalable textures, 2D mesh objects, and face animation objects. This profile does not cover body animation or 3DMC, as the profile was designed with MPEG-4 Visual Version 1 tools (body animation and 3DMC were defined only in MPEG-4 Visual, Version 2).


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