【国外标准】 Information technology - Multimedia content description interface - Part 4: Audio

Defines a Multimedia Content Description Interface, specifying a series of interfacesfrom system to application level to allow disparate systems to interchange information about multimedia content. Itdescribes the architecture for systems, a language for extensions and specific applications, description tools in theaudio and visual domains, as well as tools that are not specific to audio-visual domains. As a whole, thisInternational Standard encompassing all of the aforementioned components is known as 鬗PEG-7.?MPEG-7 isdivided into eight parts (as defined in the Foreword).This part of the MPEG-7 Standard (Part 4: Audio) specifies description tools that pertain to multimedia in the audiodomain. See below for further details of application.This part of the MPEG-7 Standard is intended to be implemented in conjunction with other parts of the standard. Inparticular, MPEG-7 Part 4: Audio assumes knowledge of Part 2: Description Definition Language (DDL) in itsnormative syntactic definitions of Descriptors and Description Schemes. This part of the standard also hasdependencies upon clauses in Part 5: Multimedia Description Schemes, namely many of the fundamentalDescription Schemes that extend the basic type capabilities of the DDL.MPEG-7 is an extensible standard. The method to extend the standard beyond the Description Schemes providedin the standard is to define new ones in the DDL, and to make those DSs available with the instantiateddescriptions. Further details are available in Part 2. To avoid duplicate functionality with other parts of the standard,the DDL is the only extension facility provided.