Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 26686-2011 General specification for digital terrestrial television receiver. In addition to editorial changes, the following main technical changes have been made with respect to GB/T 26686-2011:
——In relation to terms and definitions, symbols and abbreviations, “symbol” (see 3.2) is added;
——In relation to RF demodulation and channel decoding requirements, “working mode 8”, “working mode 9” and “working mode 10” (see 5.2.3) are added;
——In relation to RF demodulation and channel decoding requirements, "suppression of two-path echo" (see 5.2.16), "suppression of three-path echo" (see 5.2.17), "suppression 1 of channel disturbance under fixed receiving conditions" (see 5.2.18), "suppression 2 of channel disturbance under fixed receiving conditions" (see 5.2.19), "suppression of single frequency interference" (see 5.2.20) and "other multi-path model" (see 5.2.21) are added;
——In relation to basic requirements for video decoding, the requirement (see Edition 2011, 5.5.1.1.1) "the receiver shall decode the code streams with the frame frequency of 25Hz and the aspect ratio of 4:3 and 16:9 as specified in GB/T 17975.2-2000 or GB/T 20090.2-2006” is deleted; "the receiver shall decode code streams with frame frequency of 25Hz and the aspect ratio of 4:3 and 16:9 as specified in GB/T 20090.16 and shall comply with SJ/T 11594.1-2016" and "the receiver may normally decode the video code streams specified in other mainstream video coding standards” are added (see 5.5.1.1.1);
——In relation to The basic requirements for audio decoding, the requirement (see Edition 2011, 5.5.2.1) "the receiver shall have the function of decoding digital audio streams complying with MPEG-1 Layer II of GB/T 17975.3-2002 or GB/T 22726-2008, and may have the function of decoding digital audio streams complying with ETSI TS 102 366 or other digital audio streams” is deleted; "the receiver shall decode digital audio streams complying with GB/T 22726 and shall comply with the requirements of SJ/T 11594.2-2016” and "the receiver may normally decode the audio streams as specified in other mainstream audio encoding standards.” are added (see 5.5.2.1);
——"Conditional access and digital content protection” (see Edition 2011, 5.4.4) is deleted;
——Tables 20, 21 and 22 (see Edition 2011, 5.5.1.2.2) in the requirements for video display characteristics are deleted;
——Annex C (informative) Conditional access interface (see Edition 2011, Annex C) is deleted;
——Annex B (informative) Frequency division of VHF and UHF bands of radio & television (see Annex B), Annex C (normative) Multi-path channel model (see Annex C), Annex D (informative) Other multi-path channel model (see Annex D) are added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee on Audio, Video and Multimedia Systems and Equipment of Standardization Administration of China (SAC/TC 242).
The previous editions of the standard replaced by this standard are as follows:
——GB/T 26686-2011.
General specification for digital terrestrial television receiver
1 Scope
This standard specifies the functional and performance requirements, measurement methods, inspection rules, marking, packaging, transportation, storage, etc. of digital terrestrial television receiver (hereinafter referred to as receiver) supporting terrestrial digital television reception as specified in GB 20600-2006.
This standard is applicable to digital terrestrial television receivers with the size greater than 66cm (26in), and may be used as reference for receivers with the size equal to and less than 66cm (26in); it is also the main basis for product design, production finalization and inspection.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 5465.2 Graphical symbols for use on electrical equipment - Part 2: Graphical symbols
GB 8898 Audio, video and similar electronic apparatus - Safety requirements
GB/T 9383 Sound and television broadcast receivers and associated equipment-immunity characteristics - Limits and methods of measurement
GB/T 13000-2010 Information technology - Universal multiple-octet coded character set (UCS)
GB/T 13837 Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement
GB/T 14960 Technical requirements and measurement methods of infrared remote control radiation unit for television broadcast receivers
GB 17625.1 Electromagnetic compatibility - Limits - Limits for harmonic current emissions(equipment input current ≤16A per phase)
GB/T 17975.1 Information technology - Generic coding of moving pictures and associated audio information - Part 1: Systems
GB/T 20090.16 Information technology - Advanced coding of audio and video - Part 16: Broadcasting video
GB 20600-2006 Framing structure, channel coding and modulation for digital television terrestrial broadcasting system
GB/T 22122-2008 Methods of measurement of surround audio for digital TV
GB/T 22726 Specification for multichannel digital audio coding technology
GB 24850 Minimum allowable values of energy efficiency and energy efficiency grades for flat panel televisions
GB/T 26685-2017 Methods of measurement for digital terrestrial television receiver
GB/T 28160-2011 Specification of electronic programme guide for digital television broadcasting
GB/T 28161-2011 Specification of service information for digital television broadcasting
SJ/T 10514-1994 Technical requirements and methods of measurement on infrared remote control unit for television broadcast receivers
SJ/T 10919-1996 Packaging of colour broadcasting TV receivers
SJ/T 11324-2006 Terminology of digital television receiving equipment
SJ/T 11325 Reliability test methods for digital television receiver and display equipment
SJ/T 11326 Environmental testing methods for digital television receiver and display equipment
SJ/T 11327-2006 Specification for interfaces for digital television receiving equipment - Part 1: Interface of radio frequency
SJ/T 11329-2006 Specification of interfaces for digital television receiving equipment - Part 3: Video interface of composite video blanking synchronization
SJ/T 11330-2006 Specification of interfaces for digital television receiving equipment - Part 4: Video interface of S-Video
SJ/T 11331-2006 Specification of interfaces for digital television receiving equipment - Part 5: Analog audio interface
SJ/T 11332-2006 Specification of interfaces for digital television receiving equipment - Part 6: Analog video interface of RGB
SJ/T 11333-2006 Specification of interfaces for digital television receiving equipment - Part 7: Interface of video component YPBPR
SJ/T 11594.1-2016 Technical requirement and method of measurement for audio and video decoding of digital television receiver terminal - Part 1: video (AVS+)
SJ/T 11594.2-2016 Technical requirement and method of measurement for audio and video decoding of digital television receiver terminal - Part 2: audio (DRA)
3 Terms and definitions, symbols and abbreviations
3.1 Terms and definitions
For the purpose of this standard, the terms and definitions given in SJ/T 11324-2006 as well as the following apply.
3.1.1
acceptable error free
a threshold of maximum uncorrected error events within the specified time while receiving signals
3.2 Symbol
For the purposes of this document, the following symbol applies.
tD, MAX: the 0dB maximum echo delay that the receiver shall be able to withstand as specified in this standard.
3.3 Abbreviations
For the purpose of this document, the following abbreviated terms apply.
AEF——Acceptable Error Free;
C/N——Carrier-Noise ratio;
EIT——Event Information Table;
EIT p/f——EIT present/following;
EPG——Electronic Program Guide;
ES——Elementary Stream;
FS——Full Scale;
HDTV——High Definition Television;
ID——Identification;
LFE——Low Frequency Enhancement;
NIT——Network Information Table;
PAT——Program Association Table;
PCM——Pulse Code Modulation;
PCR——Program Clock Reference;
PES——Packetized Elementary Stream;
PID——Packet Identifier;
PMT——Program Map Table;
PSI——Program Specific Information;
PTS——Presentation Time Stamp;
QAM——Quadrature Amplitude Modulation;
RF——Radio Frequency;
SDT——Service Description Table;
SDTV——Standard Definition Television;
SI——Service Information;
STC——System Time Clock;
TDT——Time and Date Table;
TOT——Time Offset Table;
UHF——Ultra High Frequency;
UTC——Universal Time Co-ordinated;
VHF——Very High Frequency;
Y/C——Luminance/Chrominance.
4 General requirements
4.1 Normal service conditions
Normal service conditions shall meet the following requirements:
Ambient temperature: 5~35℃;
Relative humidity: 25%~80%;
Atmospheric pressure: 86~106kPa;
Power supply: 220V , 50×(1±2%)Hz.
4.2 Graphical symbols for equipment
Graphic symbols shall comply with the relevant requirements of GB/T 5465.2.
Graphic symbols not defined in GB/T 5465.2 are specified in relevant product standard.
4.3 Appearance and structural requirements
Receivers shall have tidy appearance, and their surfaces shall be free from such defects as concave and convex marks, scratch, crack, burr and mould stain, and the surface coating or plating shall be free from blistering, cracking or shedding, etc.
Metal parts shall be free from corrosion and other mechanical damages, and the infilled stuff shall not overflow.
Operation of switches, keys and knobs shall be flexible and reliable, and the parts and components shall be fastened without looseness. The complete machine shall have sufficient mechanical stability.
The text stating the functions and the markings of graphical symbols shall be correct, legible, upright and firm, and the indication shall be correct.
4.4 Interface requirements
The interface requirements are shown in Table 1.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions, symbols and abbreviations
3.1 Terms and definitions
3.2 Symbol
3.3 Abbreviations
4 General requirements
4.1 Normal service conditions
4.2 Graphical symbols for equipment
4.3 Appearance and structural requirements
4.4 Interface requirements
5 Technical requirements
5.1 General
5.2 Requirements for RF demodulation and channel decoding
5.3 Demultiplexing requirements
5.4 Requirements for transport stream decoding
5.5 Audio and video characteristic requirements
5.6 Power supply adaptability requirements
5.7 Functional requirements
5.8 Requirements of remote control performance and remote control transmitter
5.9 Limit of electromagnetic compatibility
5.10 Safety requirements
5.11 Reliability requirements
5.12 Environmental test requirements
5.13 Unpacking inspection requirements
5.14 Process assembly inspection requirements
6 Measurement methods
6.1 Inspection methods for graphic symbols, appearance, structure and interface for equipment
6.2 Measurement method for RF demodulation and channel decoding
6.3 Measurement method for demultiplexing
6.4 Measurement method for transport stream decoding
6.5 Measurement method for audio and video characteristics
6.6 Measurement method for power supply adaptability
6.7 Function measurement method
6.8 Measurement methods for remote control performance and remote control transmitter
6.9 Measurement method for electromagnetic compatibility characteristic limit
6.10 Safety inspection method
6.11 Reliability test method
6.12 Environmental test method
6.13 Unpacking inspection method
6.14 Process assembly inspection method
7 Inspection rules
7.1 Type inspection
7.2 Delivery for acceptance inspection
7.3 Routine inspection
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (Normative) Acceptable error free
Annex B (Informative) Frequency division of VHF and UHF bands of radio & television
Annex C (Normative) Multi-path channel model
Annex D (Informative) Other multi-path channel models
Annex E (Normative) Functions of remote control transmitter
Annex F (Normative) Inspection items and rejection criteria
Annex G (Normative) Process assembly inspection items and rejection criterion
Annex H (Normative) Normal temperature inspection items and rejection criteria
Annex I (Normative) Environmental test items and rejection criterion
Bibliography
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 26686-2011 General specification for digital terrestrial television receiver. In addition to editorial changes, the following main technical changes have been made with respect to GB/T 26686-2011:
——In relation to terms and definitions, symbols and abbreviations, “symbol” (see 3.2) is added;
——In relation to RF demodulation and channel decoding requirements, “working mode 8”, “working mode 9” and “working mode 10” (see 5.2.3) are added;
——In relation to RF demodulation and channel decoding requirements, "suppression of two-path echo" (see 5.2.16), "suppression of three-path echo" (see 5.2.17), "suppression 1 of channel disturbance under fixed receiving conditions" (see 5.2.18), "suppression 2 of channel disturbance under fixed receiving conditions" (see 5.2.19), "suppression of single frequency interference" (see 5.2.20) and "other multi-path model" (see 5.2.21) are added;
——In relation to basic requirements for video decoding, the requirement (see Edition 2011, 5.5.1.1.1) "the receiver shall decode the code streams with the frame frequency of 25Hz and the aspect ratio of 4:3 and 16:9 as specified in GB/T 17975.2-2000 or GB/T 20090.2-2006” is deleted; "the receiver shall decode code streams with frame frequency of 25Hz and the aspect ratio of 4:3 and 16:9 as specified in GB/T 20090.16 and shall comply with SJ/T 11594.1-2016" and "the receiver may normally decode the video code streams specified in other mainstream video coding standards” are added (see 5.5.1.1.1);
——In relation to The basic requirements for audio decoding, the requirement (see Edition 2011, 5.5.2.1) "the receiver shall have the function of decoding digital audio streams complying with MPEG-1 Layer II of GB/T 17975.3-2002 or GB/T 22726-2008, and may have the function of decoding digital audio streams complying with ETSI TS 102 366 or other digital audio streams” is deleted; "the receiver shall decode digital audio streams complying with GB/T 22726 and shall comply with the requirements of SJ/T 11594.2-2016” and "the receiver may normally decode the audio streams as specified in other mainstream audio encoding standards.” are added (see 5.5.2.1);
——"Conditional access and digital content protection” (see Edition 2011, 5.4.4) is deleted;
——Tables 20, 21 and 22 (see Edition 2011, 5.5.1.2.2) in the requirements for video display characteristics are deleted;
——Annex C (informative) Conditional access interface (see Edition 2011, Annex C) is deleted;
——Annex B (informative) Frequency division of VHF and UHF bands of radio & television (see Annex B), Annex C (normative) Multi-path channel model (see Annex C), Annex D (informative) Other multi-path channel model (see Annex D) are added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee on Audio, Video and Multimedia Systems and Equipment of Standardization Administration of China (SAC/TC 242).
The previous editions of the standard replaced by this standard are as follows:
——GB/T 26686-2011.
General specification for digital terrestrial television receiver
1 Scope
This standard specifies the functional and performance requirements, measurement methods, inspection rules, marking, packaging, transportation, storage, etc. of digital terrestrial television receiver (hereinafter referred to as receiver) supporting terrestrial digital television reception as specified in GB 20600-2006.
This standard is applicable to digital terrestrial television receivers with the size greater than 66cm (26in), and may be used as reference for receivers with the size equal to and less than 66cm (26in); it is also the main basis for product design, production finalization and inspection.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 5465.2 Graphical symbols for use on electrical equipment - Part 2: Graphical symbols
GB 8898 Audio, video and similar electronic apparatus - Safety requirements
GB/T 9383 Sound and television broadcast receivers and associated equipment-immunity characteristics - Limits and methods of measurement
GB/T 13000-2010 Information technology - Universal multiple-octet coded character set (UCS)
GB/T 13837 Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement
GB/T 14960 Technical requirements and measurement methods of infrared remote control radiation unit for television broadcast receivers
GB 17625.1 Electromagnetic compatibility - Limits - Limits for harmonic current emissions(equipment input current ≤16A per phase)
GB/T 17975.1 Information technology - Generic coding of moving pictures and associated audio information - Part 1: Systems
GB/T 20090.16 Information technology - Advanced coding of audio and video - Part 16: Broadcasting video
GB 20600-2006 Framing structure, channel coding and modulation for digital television terrestrial broadcasting system
GB/T 22122-2008 Methods of measurement of surround audio for digital TV
GB/T 22726 Specification for multichannel digital audio coding technology
GB 24850 Minimum allowable values of energy efficiency and energy efficiency grades for flat panel televisions
GB/T 26685-2017 Methods of measurement for digital terrestrial television receiver
GB/T 28160-2011 Specification of electronic programme guide for digital television broadcasting
GB/T 28161-2011 Specification of service information for digital television broadcasting
SJ/T 10514-1994 Technical requirements and methods of measurement on infrared remote control unit for television broadcast receivers
SJ/T 10919-1996 Packaging of colour broadcasting TV receivers
SJ/T 11324-2006 Terminology of digital television receiving equipment
SJ/T 11325 Reliability test methods for digital television receiver and display equipment
SJ/T 11326 Environmental testing methods for digital television receiver and display equipment
SJ/T 11327-2006 Specification for interfaces for digital television receiving equipment - Part 1: Interface of radio frequency
SJ/T 11329-2006 Specification of interfaces for digital television receiving equipment - Part 3: Video interface of composite video blanking synchronization
SJ/T 11330-2006 Specification of interfaces for digital television receiving equipment - Part 4: Video interface of S-Video
SJ/T 11331-2006 Specification of interfaces for digital television receiving equipment - Part 5: Analog audio interface
SJ/T 11332-2006 Specification of interfaces for digital television receiving equipment - Part 6: Analog video interface of RGB
SJ/T 11333-2006 Specification of interfaces for digital television receiving equipment - Part 7: Interface of video component YPBPR
SJ/T 11594.1-2016 Technical requirement and method of measurement for audio and video decoding of digital television receiver terminal - Part 1: video (AVS+)
SJ/T 11594.2-2016 Technical requirement and method of measurement for audio and video decoding of digital television receiver terminal - Part 2: audio (DRA)
3 Terms and definitions, symbols and abbreviations
3.1 Terms and definitions
For the purpose of this standard, the terms and definitions given in SJ/T 11324-2006 as well as the following apply.
3.1.1
acceptable error free
a threshold of maximum uncorrected error events within the specified time while receiving signals
3.2 Symbol
For the purposes of this document, the following symbol applies.
tD, MAX: the 0dB maximum echo delay that the receiver shall be able to withstand as specified in this standard.
3.3 Abbreviations
For the purpose of this document, the following abbreviated terms apply.
AEF——Acceptable Error Free;
C/N——Carrier-Noise ratio;
EIT——Event Information Table;
EIT p/f——EIT present/following;
EPG——Electronic Program Guide;
ES——Elementary Stream;
FS——Full Scale;
HDTV——High Definition Television;
ID——Identification;
LFE——Low Frequency Enhancement;
NIT——Network Information Table;
PAT——Program Association Table;
PCM——Pulse Code Modulation;
PCR——Program Clock Reference;
PES——Packetized Elementary Stream;
PID——Packet Identifier;
PMT——Program Map Table;
PSI——Program Specific Information;
PTS——Presentation Time Stamp;
QAM——Quadrature Amplitude Modulation;
RF——Radio Frequency;
SDT——Service Description Table;
SDTV——Standard Definition Television;
SI——Service Information;
STC——System Time Clock;
TDT——Time and Date Table;
TOT——Time Offset Table;
UHF——Ultra High Frequency;
UTC——Universal Time Co-ordinated;
VHF——Very High Frequency;
Y/C——Luminance/Chrominance.
4 General requirements
4.1 Normal service conditions
Normal service conditions shall meet the following requirements:
Ambient temperature: 5~35℃;
Relative humidity: 25%~80%;
Atmospheric pressure: 86~106kPa;
Power supply: 220V , 50×(1±2%)Hz.
4.2 Graphical symbols for equipment
Graphic symbols shall comply with the relevant requirements of GB/T 5465.2.
Graphic symbols not defined in GB/T 5465.2 are specified in relevant product standard.
4.3 Appearance and structural requirements
Receivers shall have tidy appearance, and their surfaces shall be free from such defects as concave and convex marks, scratch, crack, burr and mould stain, and the surface coating or plating shall be free from blistering, cracking or shedding, etc.
Metal parts shall be free from corrosion and other mechanical damages, and the infilled stuff shall not overflow.
Operation of switches, keys and knobs shall be flexible and reliable, and the parts and components shall be fastened without looseness. The complete machine shall have sufficient mechanical stability.
The text stating the functions and the markings of graphical symbols shall be correct, legible, upright and firm, and the indication shall be correct.
4.4 Interface requirements
The interface requirements are shown in Table 1.
Contents of GB/T 26686-2017
Foreword i
1 Scope
2 Normative references
3 Terms and definitions, symbols and abbreviations
3.1 Terms and definitions
3.2 Symbol
3.3 Abbreviations
4 General requirements
4.1 Normal service conditions
4.2 Graphical symbols for equipment
4.3 Appearance and structural requirements
4.4 Interface requirements
5 Technical requirements
5.1 General
5.2 Requirements for RF demodulation and channel decoding
5.3 Demultiplexing requirements
5.4 Requirements for transport stream decoding
5.5 Audio and video characteristic requirements
5.6 Power supply adaptability requirements
5.7 Functional requirements
5.8 Requirements of remote control performance and remote control transmitter
5.9 Limit of electromagnetic compatibility
5.10 Safety requirements
5.11 Reliability requirements
5.12 Environmental test requirements
5.13 Unpacking inspection requirements
5.14 Process assembly inspection requirements
6 Measurement methods
6.1 Inspection methods for graphic symbols, appearance, structure and interface for equipment
6.2 Measurement method for RF demodulation and channel decoding
6.3 Measurement method for demultiplexing
6.4 Measurement method for transport stream decoding
6.5 Measurement method for audio and video characteristics
6.6 Measurement method for power supply adaptability
6.7 Function measurement method
6.8 Measurement methods for remote control performance and remote control transmitter
6.9 Measurement method for electromagnetic compatibility characteristic limit
6.10 Safety inspection method
6.11 Reliability test method
6.12 Environmental test method
6.13 Unpacking inspection method
6.14 Process assembly inspection method
7 Inspection rules
7.1 Type inspection
7.2 Delivery for acceptance inspection
7.3 Routine inspection
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (Normative) Acceptable error free
Annex B (Informative) Frequency division of VHF and UHF bands of radio & television
Annex C (Normative) Multi-path channel model
Annex D (Informative) Other multi-path channel models
Annex E (Normative) Functions of remote control transmitter
Annex F (Normative) Inspection items and rejection criteria
Annex G (Normative) Process assembly inspection items and rejection criterion
Annex H (Normative) Normal temperature inspection items and rejection criteria
Annex I (Normative) Environmental test items and rejection criterion
Bibliography
