13.2. Profiling Policy and Version Management
The policy in defining MPEG-4 profiles and levels is aimed at obtaining a minimum number of profile@level combinations that are as widely usable as possible [N2565]. This means both a low total number (giving a “global” optimum) and a low number of different conformance points that address roughly the same application type (giving a “local” optimum); for example, there are quite a few profiles that address slightly different guises of Web applications. The profiling policy should be understood together with the approach to version management. This chapter will first discuss version management before returning to the profiling policy.
The fact that the MPEG-4 standard is delivered in versions necessitates ...
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