International Organization for Standardization

Information technology - Generic coding of moving pictures and associated audio information: Systems AMENDMENT 4: ISAN and V-ISAN use in the content labelling descriptor - Second Edition; Technical Corrigendum 1: 03/01/2002; Technical Corrigendum 2: 12/01/2002; Amendment 1: 08/01/2003; Amendment 2: 02/15/2004; Amendment 3: 11/01/2004; Technical Corrigendum 3: 06/15/2005; Amendment 4: 07/01/2005
 N ISO/IEC 13818-1 AMD 4

Annotation

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.