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GB 20600-2006Framing structure, channel coding and modulation for digital television terrestrial broadcasting system (English PDF)

数字电视地面广播传输系统帧结构、信道编码和调制

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Issued by

AQSIQ; SAC

Level / Type

National · Mandatory

Issue date

August 18, 2006

Implementation date

August 1, 2007

Scope

GB 20600-2006 is the English-translated version of 数字电视地面广播传输系统帧结构、信道编码和调制.

The Chinese national digital terrestrial television broadcasting standard, known internationally as DTMB - the transmission system China adopted instead of the European DVB-T and the American ATSC, and which is also in service in Hong Kong, Macao and a number of other countries.

It specifies the framing structure, the channel coding and the modulation of the digital television terrestrial broadcasting transmission system, and it applies to the terrestrial broadcasting of digital television in the VHF and UHF bands.

The system is defined from the transport stream inwards: the frame structure with its signal frames, super frames and calendar day frames, and the PN sequence frame header that carries both the synchronisation and the channel estimation; the scrambling, the forward error correction built from an outer BCH code and an inner low density parity check code with the several code rates that trade robustness against payload, the interleaving in time that spreads a burst error across the codewords, and the mapping onto the constellations from 4QAM-NR through 4QAM and 16QAM to 32QAM and 64QAM; and then the choice of single carrier or multi carrier transmission, which is the distinctive feature of the system, since the same frame structure and coding serve both.

The document also fixes the system information carried in the frame header, the pilot arrangement and the spectrum shaping, and it is written to be implementable on both sides of the link, so it is as much a receiver specification as a transmitter one.

The parameter combinations it defines are what determine, for a given network, whether a broadcaster gets a high data rate in a small cell or a rugged low rate signal over a large one and into moving vehicles. Issued on 18 August 2006 and in force since 1 August 2007.

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Document preview — GB 20600-2006

National Standard of the People's Republic of China

ICS: 33.160
Classification: M 63

Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

1 Scope
2 Normative References
3 Terms, Definitions, Symbols, Conventions and Abbreviations
4 System Description

1 Scope

This standard specifies the framing structure, channel coding and modulation mode for the signals of digital television terrestrial broadcasting and transmitting system in every 8MHz frequency band of digital television among the UHF / VHF frequency band.

This standard is applicable to framing structure, channel coding and modulation system of the fixed and mobile terrestrial broadcasting services with digital multichannel television/high definition television.

2 Normative References

The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to research whether the latest editions of these labels are applied or not. For undated references, the latest edition of the normative document referred to applies.

Contents of GB 20600-2006 Contents Foreword III Introduction IV

3.1 Terms and Definitions

3.2 Symbols and Conventions

3.3 Abbreviations

4.1 Overview

4.2 System Block Diagram

4.3 Interfaces

4.4 Coding and Modulation

4.4.1 Scrambling

4.4.2 Forward Error Correction

4.4.3 Symbol Constellation Mapping

4.4.4 Symbol Interleaving

4.4.5 Frequency-domain Interleaving

4.5 Multiframe

4.5.1 Multiframe Structure

4.5.2 Signal Frame

4.5.3 Superframe

4.5.4 Sub-frame

4.5.5 Calendar Day Frame

4.6 Signal Frame

4.6.1 Signal Frame Structure

4.6.2 Frame Header

4.6.3 System Information

4.6.4 Data Symbols

4.7 Data Processing of Frame Body

4.8 Baseband Post-processing

4.9 RF Signal

4.10 Spectrum Characteristic and Spectrum Template of Baseband Signal

4.9 RF Signal

4.10 Spectrum Characteristic and Spectrum Template of Baseband Signal

4.10.1 Spectrum Characteristic

4.10.2 OOB (Out of Band) Spectrum Template

4.11 System Payload Data Rate

Appendix A (Normative) Definition of the Cyclic Matrix Gi,j of LDPC Code

Appendix B (Normative) Definition of the Check Matrix of LDPC Code

Appendix C (Normative) NR Mapping

Appendix D (Normative) Definition of PN

Appendix E (Normative) Definition of PN

Appendix F (Normative) Frequency-domain Interleaving Pattern

Appendix G (Normative) System Information Mapping Table Bibliography

Referred in GB 20600-2006:

GB/T 1583-1979 Standard of colour TV image transmission * GB/T 7400.2- *

GB/T 7400.11-1999 Digital television terminology *

GB/T 7402-1987 and frequency dissemination via television signals *

GB/T 7615-1987 CATV System; Antenna part * GB/14857- *

GB/T 17975.1-2010 Information technology—Generic coding of moving pictures and associated audio information—Part 1:Systems *

GB/T 17700-1999 Channel coding and modulation STANDARD for Digital Video Broadcasting-Satellite (DVB-S) *

SJ/T 10351-1993 Generic specification for television transmitters

GB 20600-2006 is referred in:

GB/T 26686-2011 General specification for digital terrestrial television receiver *

GB/T 26685-2011 Methods of measurement for digital terrestrial television receiver *

4.11 System Payload Data Rate

Appendix A (Normative) Definition of the Cyclic Matrix Gi,j of LDPC Code

Appendix B (Normative) Definition of the Check Matrix of LDPC Code

Appendix C (Normative) NR Mapping

Appendix D (Normative) Definition of PN

Appendix E (Normative) Definition of PN

Appendix F (Normative) Frequency-domain Interleaving Pattern

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 17975.1 · GB/T 14857 · GY/T 134

Cited by

Similar standards

GB/T 17975.1|GY/T 134|GB/T 26686|GB/T 28451|GY/T 220.1|GB/T 26270

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