標準號：ISO/IEC 13818-4-2004
中文標準名稱：信息技術.運動圖像及其伴音信息的通用編碼.第4部分:一致性測試
英文標準名稱：Information technology - Generic coding of moving pictures and associated audio information - Part 4: Conformance testing
標準類型：L81
發布日期：2004/12/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：L81
適用范圍：This part of ISO/IEC 13818 specifies how tests can be designed to verify whether bitstreams and decodersmeet requirements specified in parts 1, 2, 3 and 7 of ISO/IEC 13818. In this part of ISO/IEC 13818, encodersare not addressed specifically. An encoder may be said to be an ISO/IEC 13818 encoder if it generatesbitstreams compliant with the syntactic and semantic bitstream requirements specified in parts 1, 2, 3 and 7 ofISO/IEC 13818.Characteristics of coded bitstreams and decoders are defined for parts 1, 2, 3 and 7 of ISO/IEC 13818. Thecharacteristics of a bitstream define the subset of the standard that is exploited in the bitstream. Examplesare the applied values or range of the picture size and bitrate parameters. Decoder characteristics define theproperties and capabilities of the applied decoding process. An example of a property is the appliedarithmetic accuracy. The capabilities of a decoder specify which coded bitstreams the decoder can decodeand reconstruct, by defining the subset of the standard that may be exploited in decodable bitstreams. Abitstream can be decoded by a decoder if the characteristics of the coded bitstream are within the subset ofthe standard specified by the decoder capabilities.Procedures are described for testing conformance of bitstreams and decoders to the requirements defined inparts 1, 2, 3 and 7 of ISO/IEC 13818. Given the set of characteristics claimed, the requirements that must bemet are fully determined by parts 1, 2, 3 and 7 of ISO/IEC 13818. This part of ISO/IEC 13818 summarises therequirements, cross references them to characteristics, and defines how conformance with them can betested. Guidelines are given on constructing tests to verify bitstream and decoder conformance. Thisdocument 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 electronicannex to this document.