Brief introduction of MPEG2/TS package structure

The TS package consists of the following 3 parts:

Baotou: 4 bytes, synchronization, identification, error detection and encryption

Self-adapting domain: Optional

Package data: Maximum 184 bytes (no adaptive domain exists)

4 bytes	184 bytes
Baotou	Self-adapting domain	Package data

4-byte Baotou structure:

1 bytes	1 bits	1 bits	1 bits	13 Bits	2 bits	2 bits	4 bits
Synchronization bytes	Transmission Error Descriptor	Load Start descriptor	Transfer priority	Packet recognition	Transmission scrambling control	Adaptive domain Control	Continuous counter

The self-adapting domain structure contains:

Domain Length: 1 bytes

Domain flag: 1 bytes, PCR flag is one of the important signs

Domain Information: specified by domain length

the types of package data are generally as follows:

PSI Information: Pat/pmt/cat/nit table

Video streaming

Audio streaming

Subtitle Stream

In addition to PSI information, video streaming, audio streaming, and subtitle streaming will do pes packaging.

PAT Table Structure

The Complete Pat table contains a header structure and several program structures,

Finally, a CRC check is added.

PAT Header structure (total 8 bytes)

1Byte	1bit	1bit	2bit	12bit	2Byte	2bit	5bit	1bit	1Byte	1Byte
Table identification	Segment Syntax identifiers	Fill 0	Keep	Segment length with CRC	Transport Stream Identity	Keep	Version number	Effective identification	Segment number	Last Paragraph number

Pat Table Program Structure

2Byte	3bit	13bit
Program number	Keep	Program Mapping Table PID

PMT Table Structure

A complete PMT table contains a table header and several flow structures,

Finally, a CRC check is added.

PMT Table Flow Structure

1Byte	3bit	13bit	4bit	12bit
Flow type	Keep	Basic Element PID	Keep	Program element length

PMT Header structure (total 12 bytes)

1Byte

1bit

1bit

2bit

12bit

2Byte

2bit

5bit

1bit

1Byte

1Byte

3bit

13bit

4bit

12bit

Table identification

Segment Syntax identifier

Fill 0

Reserved

Segment length incl. CRC

Number of programs

Reserved

Version

Valid identity

Segment number

Last paragraph number

Reserved

PCR PID

Keep

Program information length