ISO/IEC 13818-1:2007 信息技术 运动图像及其伴音信息的通用编码 第1部分：系统

标准编号：ISO/IEC 13818-1:2007

中文名称：信息技术 运动图像及其伴音信息的通用编码 第1部分：系统

英文名称：Information technology — Generic coding of moving pictures and associated audio information: Systems — Part 1:

发布日期：2007-10

标准范围

This Recommendation | International Standard specifies the system layer of the coding. It was developed principally tosupport the combination of the video and audio coding methods defined in Parts 2 and 3 of ISO/IEC 13818. The systemlayer supports six basic functions:1) the synchronization of multiple compressed streams on decoding;2) the interleaving of multiple compressed streams into a single stream;3) the initialization of buffering for decoding start up;4) continuous buffer management;5) time identification;6) multiplexing and signalling of various components in a system stream.An ITU-T Rec. H.222.0 | ISO/IEC 13818-1 multiplexed bit stream is either a Transport Stream or a ProgramStream. Both streams are constructed from PES packets and packets containing other necessary information. Bothstream types support multiplexing of video and audio compressed streams from one program with a common time base.The Transport Stream additionally supports the multiplexing of video and audio compressed streams from multipleprograms with independent time bases. For almost error-free environments the Program Stream is generally moreappropriate, supporting software processing of program information. The Transport Stream is more suitable for use inenvironments where errors are likely.An ITU-T Rec. H.222.0 | ISO/IEC 13818-1 multiplexed bit stream, whether a Transport Stream or a Program Stream, isconstructed in two layers: the outermost layer is the system layer, and the innermost is the compression layer. Thesystem layer provides the functions necessary for using one or more compressed data streams in a system. The videoand audio parts of this Specification define the compression coding layer for audio and video data. Coding of othertypes of data is not defined by this Specification, but is supported by the system layer provided that the other types ofdata adhere to the constraints defined in 2.7.

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