GB/T 20090.1-2012
Information technology.Advanced coding of audio and video.Part 1:System (English Version)

Standard No.

GB/T 20090.1-2012

Language

Chinese, Available in English version

Release Date

2012

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 20090.1-2012

Scope

This part of GB/T 20090 specifies the coding system layer, which is mainly used to combine the video bit stream and audio bit stream defined in GB/T 20090. The system layer supports the following five basic functions: a) synchronization of multiple compressed bit streams during decoding; b) interleaving of multiple compressed bit streams into a single bit stream; c) initialization of buffers to start decoding; d) continuous buffer management; e) time stamping. This part applies to applications such as digital TV broadcasting, laser digital storage media, Internet broadband streaming media, and multimedia communications. A multiplexed bitstream can be a Transport Stream or a Program Stream. Both streams consist of PES packets or packets containing other necessary information. Both stream types support multiplexing of compressed video and audio bitstreams from programs with a common time reference. Transport Streams also support the multiplexing of video and audio compressed bitstreams from multiple programs with independent time bases. Program streams are generally more suitable for environments where few errors occur and support software processing of program information. Transport streams are better suited for environments where errors can occur. Regardless of whether it is a transport stream or a program stream, the structure of a multiplexed bit stream is divided into two layers: the outermost layer is the system layer, and the innermost layer is the compression layer. The system layer provides the functionality needed to use one or more streams of compressed data in the system. Parts 2 and 3 of GB/T20090 define the compression coding layers for audio and video data. The definition of other types of data encoding is not included in this section, but if they comply with the definition in Chapter 9 of this section, the system layer also supports such data encoding.

GB/T 20090.1-2012 Referenced Document

• GB/T 15273.1-1994 Information processing--8-bit single-byte coded graphic character sets--Part 1:Latin alphabet No.1
• GB/T 17191.1-1997 Information technology--Coding of moving pictures and associated audio for digital storage media at up to about 1.5Mbit/s--Part 1: Systems
• GB/T 17191.3-1997 Information technology--Coding of moving pictures and associated audio for digital storage media at up to about 1.5Mbit/s--Part 3: Audio
• GB/T 17975.1 Information technology.Generic coding of moving pictures and associated audio information.Part 1:Systems
• GB/T 17975.2-2000 Information technology-Generic coding of moving picture and associated audio information-Part 2:Video
• GB/T 17975.3-2002 Information technology--Generic coding of moving pictures and associated audio information Part 3:Audio
• GB/T 20090.2-2006 Information technology-Advanced coding of audio and video-Part 2:Video
• GB/T 20090.4 Information technology.Advanced coding of audio and video.Part 4:Conformance testing
• GB/T 4880.2-2000 Codes for the representation of names of languages--Part 2: Alpha-3 code
• ISO/IEC 13522-1:1997 Information technology - Coding of multimedia and hypermedia information - Part 1: MHEG object representation - Base notation (ASN.1)
• ISO/IEC 13818-6:1998 Information technology - Generic coding of moving pictures and associated audio information - Part 6: Extensions for DSM-CC

GB/T 20090.1-2012 history

• 2012 GB/T 20090.1-2012 Information technology.Advanced coding of audio and video.Part 1:System

GB/T 20090.1-2012 -All Parts