标准号：ISO/IEC 14496-4-2004
实施状态：现行
中文名称：信息技术.音频-可视对象的编码.第4部分:一致性测试
英文名称：Information technology - Coding of audio-visual objects - Part 4: Conformance testing
发布日期：2004-12-01
代替标准：ISO/IEC 14496-4-2000;ISO/IEC 14496-4 Technical Corrigendum 1-2002;ISO/IEC 14496-4 FDAM 1-2003;ISO/IEC 14496-4 FDAM 2-2003;ISO/IEC 14496-4 FDAM 3-2003;ISO/IEC 14496-4 FDAM 4-2004;ISO/IEC 14496-4 FDAM 5-2004;ISO/IEC 14496-4 FDAM 7-2004
采用标准：ANSI/INCITS/ISO/IEC 14496-4-2004,IDT;CAN/CSA-ISO/IEC 14496-4-06-2006,IDT
起草单位：ISO/IEC JTC 1/SC 29
标准简介：This part of ISO/IEC 14496 specifies how tests can be designed to verify whether bitstreams and decoders
meet requirements specified in parts 1, 2 and 3 of ISO/IEC IEC 14496 and for part 6 of ISO/IEC 14496 it
specifies how tests can be designed for bitstream delivery over various delivery technologies in an
interoperable transparent manner to parts 1, 2 and 3. In this part of ISO/IEC 14496, encoders are not
addressed specifically. An encoder may be said to be an ISO/IEC 14496 encoder if it generates bitstreams
compliant with the syntactic and semantic bitstream requirements specified in parts 1, 2 and 3 of
ISO/IEC 14496.
Characteristics of coded bitstreams and decoders are defined for parts 1, 2 and 3 of ISO/IEC 14496. The
characteristics of a bitstream define the subset of the standard that is exploited in the bitstream. Examples are
the applied values or range of the picture size and bitrate parameters. Decoder characteristics define the
properties and capabilities of the applied decoding process. An example of a property is the applied arithmetic
accuracy. The capabilities of a decoder specify which coded bitstreams the decoder can decode and
reconstruct, by defining the subset of the standard that may be exploited in decodable bitstreams. A bitstream
can be decoded by a decoder if the characteristics of the coded bitstream are within the subset of the
standard specified by the decoder capabilities.
Procedures are described for testing conformance of bitstreams and decoders to the requirements defined in
parts 1, 2 and 3 of ISO/IEC 14496. Given the set of characteristics claimed, the requirements that must be
met are fully determined by parts 1, 2 and 3 of ISO/IEC 14496. This part of ISO/IEC 14496 summarises the
requirements, cross references them to characteristics, and defines how conformance with them can be
tested. Guidelines are given on constructing tests to verify bitstream and decoder conformance. This
document gives guidelines on how to construct bitstream test suites to check or verify decoder conformance.
In addition, some test bitstreams implemented according to those guidelines are provided as an electronic
annex to this document. The procedures and signaling messages for session and channel establishment are
defined in part 6 of ISO/IEC 14496.
Conformance with the signaling messages and procedures in this part of ISO/IEC 14496 are defined in
accordance to the specifications in part 6 of ISO/IEC 14496. This specification allows the manufacturer to
identify the conformance of the signaling message in a static review and provides abstract test cases to test
the conformance to the procedures in a dynamic review of an implementation as defined in ISO/IEC 9646
Conformance Testing standard.
文件格式：PDF
文件大小：123.75KB
文件页数：8
（以上信息更新时间为：2019-11-22）
ISO_IEC 14496-4-2004 信息技术.音频-可视对象的编码.第4部分_一致性测试.pdf
(123.75 KB)
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