ANSI ISO IEC-14496-5-2001 pdf download Information technology一Coding of audio-visual objects一 Part 5: Reference software AMENDMENT 2: MPEG 4 reference software extensions for XMT and media nodes
1 Scope Reference software is normative in the sense that any conforming implementation of the software, taking the same conformant bitstreams, using the same output file format, will output the same file. Complying ISO/IEC 14496 implementations are not expected to follow the algorithms or the programming techniques used by the reference software. Although the decoding software is considered normative, it cannot add anything to the textual technical description included in parts 1, 2, 3 and 6 of ISO/EC 14496. The software contained in this part of ISO/IEC 14496 is divided into three categories:
a) Elementary stream decoding software is catalogued in clauses3, 4 and 5. This sofware accepts elementary streams encoded according to the normative specification in parts 1, 2, 3 and 6 of ISO/EC 14496 and decodes the streams into the media types associated with each elementary stream. While this software appears in the normative part of this specification, attention is drawn to the fact that the implementation techniques used in this software are not considered normative – several different implementations could produce the same result – but the software is considered normative in that it correctly implements the decoding processes 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 creates elementary streams from associated media types. The encoders are provided as a means to obtain elementary streams with the normative syntax described in parts 1, 2 and 3 of ISO/IEC 14496. The techniques used for encoding are not specified by this specification, and the quality and complexity of these encoders has not been optimized.
c) Utility software is catalogued in Annex B (informative). This software was found useful by the developers of the standard, but may not conform to the normative specifications given in parts 1, 2, 3 and 6 of ISO/IEC 14496. File locations given in this part of ISO/IEC 14496 are expressed relative to its location in the source tree.
2 Copyright disclaimer for software modules Each source code module in this specification contains copyright disclaimer which shall not be removed from the source code module. In the text of each copyright disclaimer, is replaced with a reference to its associated specification, e.g. MPEG-2 AAC (ISO/IEC 13818-7), MPEG-4 System (ISO/IEC 14496-1), MPEG-4 Video (ISO/IEC 14496- 2), MPEG-4 Audio (ISO/IEC 14496-3). “This sofware module was originally developed by ()) and edited by (), (), … in the course of development of the . This software module is an implementation of a part of one or more tools as specifed by the . ISO/IEC gives users of the free license to this software module or modifications thereof for use in hardware or software products claiming conformance to the . Those intending to use this software module in hardware or software products are advised that its use may infringe existing patents. The