Superseded

GB/T 26685-2011Methods of measurement for digital terrestrial television receiver (English PDF)

Preview PDF

This is a limited preview

Buy now to download the full PDF (48 pages)

Need quotation for your management?

Get a formal quotation for GB/T 26685-2011 in 30 minutes.

Issued by

General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ)

Level / Type

National · Recommended

Issue date

June 16, 2011

Implementation date

November 1, 2011

Scope

GB/T 26685-2011 (Methods of measurement for digital terrestrial television receiver) is available as an English-translated PDF.

GB/T 26685-2011 — This Standard specifies the performance measurement items, measurement conditions and measurement method of digital terrestrial television receiver (hereinafter referred to as receiver) that supports digital terrestrial television reception function specified in GB 20600-2006.

This Standard is applicable to standard definition (SD) and high definition (HD) digital terrestrial television receivers that support digital terrestrial television reception function specified in GB 20600-2006.

Found what you need?

Document preview — GB/T 26685-2011

National Standard of the People's Republic of China

ICS: 33.160.25
Classification: M 74

Issued by: General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ)

1 Scope...4
2 Normative References...4
3 Terms, Definitions and Acronyms...5
3.1 Term and Definition...5
3.2 Abbreviation...5
4 Basic Requirements on Measurement...6
4.1 General Description...6
4.2 Test Signal...7
4.4 Standard Measuring Conditions...8
5 Measurement Items and Method...9
5.1 System Chart...9
5.2 Requirements on RF Demodulation and Channel Decoding...10
5.3 Requirements on Demultiplexing...20
5.4 Requirements on Transport Stream Decoding...24
5.5 Requirements on Video Characteristics...25
5.6 Requirements on Audio Characteristic...27
5.7 Requirements on Power Adaptability...30
5.8 Whole-set Power Consumption...31
5.9 Standby power consumption...31
5.10 Requirements on Functions...32
Appendix A...46
Appendix B...48

Foreword

This Standard is drafted in accordance with the rules specified in GB/T 1.1-2009.

This Standard was proposed by the Ministry of Industry and Information Technology of

the People's Republic of China.

This Standard shall be under the jurisdiction of the National Technical Committee 242

on Audio, Video, Multimedia System and Equipment of Standardization Administration

of China (SAC/TC 242).

Chief drafting organizations of this Standard. China Electronics Standardization

Institute, Shenzheng Saixi Information Technology Co., Ltd. (national engineering lab

for electronic information products standardization), Shanghai Jiaotong University,

Qinghua University, Sichuan Changhong Electric Co., Ltd., TCL Corporation, Nanjing

Panda Electronics Company Limited, National Digital Audio, Video and Multimedia

Product Quality Supervision and Inspection Center, Shanghai High Definition Digital

Technology Industrial Corporation, Qingdao Hisense Electric Co., Ltd., Xiamen Prima

Electric Co., Ltd., the Third Research Institute of China Electronics Technology Group

Corporation, Tianjin University, Beijing Mudan Shiyuan Electronics Technology Co.,

Ltd., Skyworth Group Co., Ltd., Shanghai Guangdian Electric (Group) Co., Ltd.,

Konka Group, Qingdao Haier Group, Shenzhen SMIT Co., Ltd., Hangzhou National

Chip Science & Technology Co. Ltd., and SOYEA Technology Co., Ltd.

Chief drafting staffs of this Standard. Zhang Subing, Hu Peng, Chen Renwei, Sun Jun,

Pan Changyong, Zhang Xia, Sun Qifeng, Yang Xia, Wang Xuehong, Xu Yan, Sun

Yuemin, Wang Li, Cheng Xi, Wu Minghua, Lu Tiemin, Yu Zhiyong, Zhai Yili, Wang

Minghua, Guan Jun, Fu Liang, and Gao Ge.

Methods of Measurement for Digital Terrestrial

Television Receiver

1 Scope

This Standard specifies the performance measurement items, measurement

conditions and measurement method of digital terrestrial television receiver

(hereinafter referred to as receiver) that supports digital terrestrial television reception

function specified in GB 20600-2006.

This Standard is applicable to standard definition (SD) and high definition (HD) digital

terrestrial television receivers that support digital terrestrial television reception

function specified in GB 20600-2006.

2 Normative References

The following documents are essential for the application of this Standard. For the

dated normative references, only the dated editions are applicable to this document.

For the undated references, the latest editions of the normative documents (including

all the amendments) are applicable to this document.

GB/T 3174 Characteristics of PAL-D Television Broadcasting System

GB 3659 Methods of Measurement of Television Video Channel

GB/T 17975.1 Information Technology - Generic Coding of Moving Picture and

Associated Audio Information - 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 Picture

and Associated Audio Information - Part 2.Video (ITU-TH, 262.1995, IDT)

GB/T 17975.3-2002 Information Technology - Generic Coding of Moving Picture

and Associated Audio Information - Part 3.Audio (ISO/IEC 13818-3.1998, IDT)

GB/T 20090.2-2006 Information Technology - Advanced Coding of Audio and

Video - Part 2.Video

GB 20600-2006 Framing Structure, Channel Coding and Modulation for Digital

Television Terrestrial Broadcasting System

GB/T 22726-2008 Specification for Multichannel Digital Audio Coding Technology

GB/T 26270-2010 Standard Test Signals for Digital Television Receiving

Equipment

SJ/T 11157-1998 Methods of Measurement on Receivers for Television Broadcast

Transmissions - Part 2.Electrical Measurements on Audio Channels Methods in

General and Those for Monophonic Channels

SJ/T 11180-1998 Basic Methods of Measurement of Digital Audio Characteristics

of Audio and Audiovisual Equipment

SJ/T 11324-2006 Terminology of Digital Television Receiving Equipment

SJ/T 11345-2006 Methods of Measurement for Digital Television Cathode Ray

Tube Displays

SJ/T 11348-2006 Methods of Measurement for Digital Television Flat Panel

Displays

3 Terms, Definitions and Acronyms

3.1 Term and Definition

For the purpose of this Standard, the following terms and definitions AND the ones in

SJ/T 11324-2006 apply.

3.1.1

Acceptable error free [Translator. abbreviated as error-free]

Error code events that are not corrected within the specified time are less than a

certain threshold in the signal reception.

3.2 Abbreviation

AEF — Acceptable error-free;

EIT — Event information table;

EIT p/f — EIT present/following;

EPG — Electronic program guide;

MPEG — Moving Picture Experts Group;

NIT — Network information table;

PCR — Program clock reference;

PID — Packet identifier;

PMT — Program map table;

PSI — Program specific information;

SDT — Service description table;

SI — Service information;

TDT — Time and date table;

TOT — Time offset table;

UHF — Ultra high frequency;

UTC — Universal time co-ordinated;

VHF — Very high frequency.

4 Basic Requirements on Measurement

4.1 General Description

4.1.1 Operating conditions

Unless otherwise specified, the receivers shall be tested in the measuring conditions

specified in 4.4.

4.1.2 Measurement site

The measurement shall be carried out in indoor room where is not subject to ambient

radio frequency and low frequency electromagnet field interference; if ambient

electromagnet field interferes the measuring results, the measurement shall be done

in a shielded room.

The measurements on performance parameters of light and color shall be carried out

in a dark room where the stray light illumination shall be less than or equal to 1 lx.

The acoustical property measurement shall be carried out in an anechoic chamber;

and the anechoic chamber shall meet the relevant requirements of SJ/T 11157-1998.

4.1.3 Measurement environment conditions

4.1.3.1 Measurement conditions

Ambient temperature. 15°C~35°C;

Relative humidity. 25%~75%;

Atmosphere pressure. 86kPa~106kPa;

Power. 220×(1±5%)V, 50×(1±2%) Hz.

4.1.3.2 Arbitration conditions

Environment temperature.20°C±2°C;

Relative humidity. 60%~70%;

Atmosphere pressure. 86kPa~106kPa;

Power. 220×(1±2%) V, 50×(1±1%) Hz;

Power harmonic. (0~5)%.

4.1.4 Stability time

The receiver shall steadily work at least 15min under the standard measuring

conditions, in order to guarantee that the receiver performance does not obviously

change along the time after the measurement begins.

4.2 Test Signal

See GB/T 26270-2010.

4.3 Measurement System and Instrument

The specific requirements are shown in Table 1.

Table 1

No. Equipment name Requirement

1 Digital television measurement transmitter (DTMT) Support 330 operating modes specified in...

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 48 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 3174 · GB 3659 · GB/T 17975.1 · GB/T 17975.1-2010 · GB/T 17975.2-2000 · GB/T 17975.3-2002 · ISO/IEC 13818

Cited by

How to Download GB/T 26685-2011

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.