ISO/IEC 14496-5-2001 信息技术.音视对象编码.第5部分:参考软件

标准号：ISO/IEC 14496-5-2001
中文标准名称：信息技术.音视对象编码.第5部分:参考软件
英文标准名称：Information technology - Coding of audio-visual objects - Part 5: Reference software
标准类型：L81
发布日期：2001/12/1 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：L81
国际标准分类号：33.160.01;35.040;35.080
适用范围：Reference software is normative in the sense that any conforming implementation of the software, taking the sameconformant bitstreams, using the same output file format, will output the same file. Complying ISO/IEC 14496implementations are not expected to follow the algorithms or the programming techniques used by the referencesoftware. Although the decoding software is considered normative, it cannot add anything to the textual technicaldescription included in parts 1, 2, 3 and 6 of ISO/IEC 14496.The software contained in this part of ISO/IEC 14496 is divided into three categories:a) Elementary stream decoding software is catalogued in clauses 3, 4 and 5. This software acceptselementary streams encoded according to the normative specification in parts 1, 2, 3 and 6 of ISO/IEC 14496and decodes the streams into the media types associated with each elementary stream. While this softwareappears in the normative part of this specification, attention is drawn to the fact that the implementationtechniques used in this software are not considered normative – several different implementations couldproduce the same result – but the software is considered normative in that it correctly implements the decodingprocesses described in parts 1, 2, 3 and 6 of ISO/IEC 14496.b) Elementary stream encoding software is catalogued in Annex A (informative). This software createselementary streams from associated media types. The encoders are provided as a means to obtainelementary streams with the normative syntax described in parts 1, 2 and 3 of ISO/IEC 14496. The techniquesused for encoding are not specified by this specification, and the quality and complexity of these encoders hasnot been optimized.c) Utility software is catalogued in Annex B (informative). This software was found useful by the developers ofthe standard, but may not conform to the normative specifications given in parts 1, 2, 3 and 6 ofISO/IEC 14496.File locations given in this part of ISO/IEC 14496 are expressed relative to its location in the source tree.