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Chapter 16. Audio Testing for Validation > Version 2 Coding Efficiency Test

16.6. Version 2 Coding Efficiency Test

MPEG-4 Audio Version 1 includes a considerable number of tools for representing audiovisual information, either in natural or in synthetic form, supporting most of the functionalities described in the initial MPEG-4 Proposal Package Description [N998] and in the MPEG-4 Requirements document [N4319] (see Chapter 1). Nevertheless, MPEG experts felt that MPEG-4 could be further improved by including new technologies and additional functionalities. This fact motivated the decision to work for MPEG-4 Audio Version 2, developing new tools with the constraint that they would be complementary and not a substitution for the tools already included in the MPEG-4 Audio Version 1. The set of new tools was nicknamed within MPEG as MPEG-4 Audio Version 2 and it was included in the MPEG-4 Audio standard as an amendment [MP4V2-3].

The set of new tools included in MPEG-4 Audio Version 2 includes the following (see Chapters 10 and 11):


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