This standard specifies function and performance requirements, measuring methods, inspection rules, marking, packaging, transportation and storage for the digital terrestrial set-top boxes (hereinafter referred to as "set-top boxes") supporting the digital terrestrial television receiving function as specified in GB 20600-2006.
This standard is applicable to digital terrestrial set-top boxes and is the main basis for product design, production type approval and inspections.
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 2312-1980 Code of Chinese Graphic Character Set for Information Interchange—Primary Set
GB/T 2828.1-2012 Sampling Procedures for Inspection by Attribute—Part1: 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 14960-1994 Technical Requirements and Methods of Measurement 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: System
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 (DTMB)
GB/T 22122-2008 Methods of Measurement of Surround Audio for Digital TV
GB/T 22726 Specification for Multichannel Digital Audio Coding Technology
GB 25957 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Digital Television Adapters (Set-Top Boxes)
GB/T 26684-2017 Methods of Measurement for Digital Terrestrial Set-top Box
GB/T 26685-2017 Methods of Measurement for Digital Terrestrial Set-top Box
GB/T 26686-2017 General Specification for Digital Terrestrial Set-top Box
GB/T 28160-2011 Specification of Electronic Programme Guide 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 Color Broadcasting TV Receivers
SJ/T 11324-2006 Terminology of Digital Television Receiving Equipment
SJ/T 11325-2006 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 of 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 Requirements and Measuring Methods for Audio and Video Decoding of Digital TV Receiving Terminal—Part 1: Video (AVS+)
SJ/T 11594.2-2016 Technical Requirements and Measuring Methods for Audio and Video Decoding of Digital TV Receiving Terminal—Part 2: Audio (DRA)
3 Terms, Definitions, Symbols and Abbreviations
3.1 Terms and Definitions
For the purpose of this standard, the terms and definitions established in SJ/T 11324-2006 and the following ones apply.
3.1.1
acceptable error free
a threshold of maximum uncorrected error events within the specified time while receiving signals
3.2 Symbols
tD,MAX: the maximum delay of 0dB echo withstandable to set-top box as specified hereby
3.3 Abbreviations
For the purposes of this standard, the following abbreviations apply.
AEF: Acceptable Error Free
C/N: Carrier-Noise ratio
ECM: Entitlement Control Message
EIT: Event Information Table
EIT p/f: EIT present/following
EMM: Entitlement Management Message
EPG: Electronic Program Guide
FS: Full Scale
HDTV: High Definition Television
LFE: Low Frequency Enhancement
GB/T 26683-2017 The following standards are cited：
