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

1 Scope

This section GB/T 20090 specifies the coding system layer, mainly used in combination GB/T 20090 definition video bit stream and audio bit flow. System layer supports the following five basic functions.

a) a plurality of synchronous decoding the compressed bit stream;

b) a plurality of compressed bit stream interleaved into a single bit stream;

c) for the start of the decoding buffer is initialized;

d) continuous buffer management;

e) time stamp.

This section applies to digital television broadcasting, laser digital storage media, Internet broadband streaming media and multimedia communication applications.

A multiplexed bit stream may be a transport stream or program stream. Both streams are PES packet or packets containing other necessary information packet constitute. Both streams types support multiplexing from having a common time base program video and audio compression bit stream. Transport Stream also supports

Multiplexing from multiple programs with independent time base compressed video and audio bit stream. Program Stream is generally more suitable for almost error does not occur

Environment and support software program information processing. Transport Stream is more suitable for the environment can go wrong.

Whether it is a transport stream or program stream structure a multiplexed bit stream is divided into two layers. the outermost layer is the system layer, the innermost layer is compressed.

System layer provides the use of the system in one or more compressed data streams desired function. GB/T 20090 Part 2 and Part 3 set

Compression coding layer defines the audio and video data. Other types of data encoding definition not included in this section, but if they comply with this

The definitions section in Chapter 9, the system also supports layers such data encoding.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 4880.2-2000 Language Name Code Part 2. 3 letter code (eqv ISO 639-2.1998)

GB/T 15273.1-1994 Information processing bit single-byte coded graphic character sets - Part 1. Latin alphabet a (idt

ISO 8859-1. 1987)

Digital storage media moving image GB/T 17191.1-1997 Information technology 1.5Mbit/s data transfer rate and with

Coding of audio - Part 1. System (idt ISO /IEC 11172-1.1993)

Digital storage media moving image GB/T 17191.2-1997 Information technology 1.5Mbit/s data transfer rate and with

Coding of audio - Part 2. Video (idt ISO /IEC 11172-2.1993)

Digital storage media moving image GB/T 17191.3-1997 Information technology 1.5Mbit/s data transfer rate and with

Coding of audio - Part 3. Audio (idt ISO /IEC 11172-3.1993)

GB/T 17975.1 Information technology of moving pictures and associated audio information - Generic coding - Part 1. System (GB/T 17975.1-

2010, ISO /IEC 13818-1.2007, MOD)

GB/T 17975.2-2000 Information technology - Generic coding of moving pictures and associated audio information - Part 2. Video (idtITU-

TH.262.1995)

GB/T 17975.3-2002 Information technology - Generic coding of moving pictures and associated audio information - Part 3. Audio (idt ISO / […]