ISO/IEC 13818-1 : 2000 (E)
ITU-T Rec. H.222.0 (2000 E) 1
INTERNATIONAL STANDARD
ISO/IEC 13818-1 : 2000 (E)
ITU-T Rec. H.222.0 (2000 E)
ITU-T RECOMMENDATION
INFORMATION TECHNOLOGY – GENERIC CODING OF MOVING
PICTURES AND ASSOCIATED AUDIO INFORMATION: SYSTEMS
SECTION 1 – GENERAL
1.1 Scope
This Recommendation | International Standard specifies the system layer of the coding. It was developed principally to
support the combination of the video and audio coding methods defined in Parts 2 and 3 of ISO/IEC 13818. The system
layer supports five 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; and
5) time identification.
An ITU-T Rec. H.222.0 | ISO/IEC 13818-1 multiplexed bit stream is either a Transport Stream or a Program Stream.
Both streams are constructed from PES packets and packets containing other necessary information. Both stream 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 multiple
programs with independent time bases. For almost error-free environments the Program Stream is generally more
appropriate, supporting software processing of program information. The Transport Stream is more suitable for use in
environments 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, is
constructed in two layers: the outermost layer is the system layer, and the innermost is the compression layer. The system
layer provides the functions necessary for using one or more compressed data streams in a system. The video and audio
parts of this Specification define the compression coding layer for audio and video data. Coding of other types of data is
not defined by this Specification, but is supported by the system layer provided that the other types of data adhere to the
constraints defined in 2.7.
1.2 Normative references
The following Recommendations and International Standards contain provisions which, through reference in this text,
constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated
were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this
Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent
edition of the Recommendations and Standards indicated below. Members of IEC and ISO maintain registers of currently
valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently
valid ITU-T Recommendations.
1.2.1 Identical Recommendations | International Standards
– ITU-T Recommendation H.262 (2000) | ISO/IEC 13818-2:2000, Information technology – Generic
coding of moving pictures and associated audio information: Video.
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