镇海区有线数字电视基本型机顶盒技术规范书Technicalspecification for basic set top box of cable digital TV setin Zhenhai District
Technical specification forbasic set top box of cable digitalTV set in Zhenhai District
1, the standards to be followed
1. 1 set-top boxes should meet the standards
The set-top box should meet the MPEG-2 standard, DVB standardand Chinese broadcasting standards, should comply with theissued by relevant international organizations or China' s homeappliance products for testing and certification standards,and meet the following standards and specifications:
* ISO/IEC, IS 13818-1, motion pictures and decoding of theirassociated sounds - systems"
* ISO/IEC, IS 13818-2, motion pictures and decoding of theirassociated sounds - images"
* ISO/IEC, IS 13818-3, motion pictures and decoding of theirassociated sounds - sounds"
* GY/T 170-2001 code for modulation and modulation of wireddigital television broadcasting channels"
*EST 300429, digital broadcasting system for television, soundand data services; frame structure, channel decoding and
demodulation of wired systems"
* GB 3659-1983 "television video channel test method"
* GB 7401-1987 "subjective evaluation method for colortelevision image quality"
* GB 3174-1995 "PAL-D technical specification for televisionbroadcasting"
* GY/Z 174-2001, digital television broadcasting serviceinformation specification"
* GY/Z 175-2001 specification for conditional access systemsfor digital television broadcasting"
* GY/T 201-2004, data broadcasting specification in digitaltelevision systems"
*GY/T 203-2004 specification for digital televisionbroadcastelectronic programme guide"
* GY/T106-99 technical requirements and measurement methodsfor subscriber terminal receivers for cable digital televisionsystems (Provisional)
* GB/T 16649-1996 smart card interface specification"
* ISO7816 smart card (Smart Card) specification
*EN 300428, the service information (SI) specification (DVB-SI)
in the DVB system"
* ETR 211, DVB service information (SI) guide for use andI mp l eme ntat i on (DVB-S I)"
*transmit text information and specif ications (DVB-TXT) in thebitstream of EN 300472 "DVB""
* EN 301192 "DVB specification for data broadcasting
(DVB-DA TA)"
* interface specification specification for TS102201 DVB IRD(DVB-I RD)
* EN50221 general interface for conditional access and otherDVB decoder applications
Specification (DVB-CI)
* simultaneous encryption (SimulCrypt) technology in
TS101197-1DVB systems
Specification (DVB-SIM)
* ETR289 general scrambling system description (DVB-CSA)
* ETR154MPEG-2 systems, video and audio applications insatellite, cable and terrestrial broadcasting
Impl ementation Guide (DVB-MPEG)
* ITU-TJ. 112 recommends an interactive cable TV servicetransmission system
* GB 2312-1980, the basic set of Chinese coded character setsfor information interchange
* GB/T 14960-94 "infrared remote control transmitters fortelevision broadcast receivers - technical requirements andmeasurements
Quantity method"
* SJ/T 10514-94: technical requirements and measurements ofinfrared remote control for television broadcast receiversMethod"
* GB 8898-2001 "safety requirements for audio, video andsimilar electronic equipment"
* GB/T 9383-1999 "immunity limits for sound and televisionbroadcast receivers and related equipment, and
Measuring method"
* GB 13837-1997 "interference characteristic of sound andtelevision broadcast receivers and related equipment. "Values and methods of measurement"
* general specification for digital TV set top box (Dan Xiang)
* security for GB4943 information technology set-top boxes(including electrical transaction set-top boxes)
* radio interference limit values and measurement methods forGB9254 information technology set top boxes
*GB/T 2421 basic environmental test procedures for electricaland electronic products -- General rules
* ISO/IEC13838 information technology - General encoding ofmoving pictures and their accompanying signals
* IETF RFC 768 - UDP: User Datagram Protocol user datagramprotocol
* IETP RFC 793 - TCP: Transmission Control Protocol transportcontrol protocol
* in line with the provisional technology of digital cabletelevision issued by the science and Technology Department ofthe State Administration of radio, film and television in April1, 2003
* support digital video compression standards (ISO/IEC13838information technology - General encoding of motion picturesand their accompanying sound signals) ;
* support transmission standards (GYT/T170-2001 cable digitaltelevision broadcast channel coding and modulationspecification) ;
* guidelines for the application of conditional access systemsfor cable digital television (Provisional)
* technical requirements and measurement methods forsubscriber terminal receivers for cable digital televisionsystems Part 1: transparent transmission electricalperformance parameters (Provisional)
* guidelines for the application of the cable digitaltelevision broadcasting service (Provisional)
*Guiding Opinions on the electronic digital TV programme guide(Provisional)
* Guiding Opinions on the middleware for cable digitaltelevision (Provisional)
* guidelines for the implementation of the functions of cabledigital TV set top boxes and remote control (Provisional)For there is no reference to the standard product, the suppliershould be specified, and give a written guarantee in the futurefree upgrade to the national standard.
1.2 set-top box access requirements
Set-top boxes must have a network permit from sarft;
Set top box must pass 3C authentication;
The set-top boxes must comply with the technical requirementsspecified in this document;
2 、 hardware configuration and interface requirements
2. 1 configuration requirementsprocessor
More than 100MIPS
Flash memory
More than 4MB
RAM
More than 16MB
EEPROM
More than 8KB
Note: video RAM and system RAM can be together or separate fromeach other.
2.2 interface requirements
2.2. 1 RF input interface
RF input frequency
47-862MHz
Input resistance
75 ohm
Input level
Minimum <40db Mu V, highest >70db Mu V (64QAM)Channel bandwidth
8MHz
C/N threshold (C/N, threshold)
= 28 (64QAM, 6.952Mbau d)
Frequency capture range
+ 150kHz
Input reflection loss
More than 8dB
Local oscillator leakage (Intrinsic, Loss)43db V
Demodulation system
16, 32, 64, 128, 256 QA M
Support symbol rate range
1-6.952 Mb a u d (64 QAM)
RF physical interface
British FFeMale
2.2.2 RF loop output interface
Loop frequency
47862MHZ
Output resistance
75 ohm
Physical interface
OUT-IEC 169-1FeMale
Note:when the set-top box is cut off the power supply, the levelloss requirement of the RF ring is less than 5dB Mu v.
2.2. 3 video output interface
RAKsmart 商家八月份的促销活动今天更新。基本上和上个月的产品套餐活动差不多的,不过也是有简单的微调。对于RAKsmart商家还是比较了解的,他们家产品虽然这两年增加多个机房,以及在VPS主机方案上有丰富的机房和调整到一些自营机房,他们家的策划能力还是有限,基本上每个月的套餐活动都差不多。RAKsmart 在八月份看到有新增香港高防服务器可选,最高100GB防御。同时原来上个月缺货的日本独立...
提速啦(www.tisula.com)是赣州王成璟网络科技有限公司旗下云服务器品牌,目前拥有在籍员工40人左右,社保在籍员工30人+,是正规的国内拥有IDC ICP ISP CDN 云牌照资质商家,2018-2021年连续4年获得CTG机房顶级金牌代理商荣誉 2021年赣州市于都县创业大赛三等奖,2020年于都电子商务示范企业,2021年于都县电子商务融合推广大使。资源优势介绍:Ceranetwo...
搬瓦工怎么样?2021年7月最新vps套餐推荐及搬瓦工优惠码整理,搬瓦工优惠码可以在购买的时候获取一些优惠,一般来说力度都在 6% 左右。本文整理一下 2021 年 7 月最新的搬瓦工优惠码,目前折扣力度最大是 6.58%,并且是循环折扣,续费有效,可以一直享受优惠价格续费的。搬瓦工优惠码基本上可能每年才会更新一次,大家可以收藏本文,会保持搬瓦工最新优惠码更新的。点击进入:搬瓦工最新官方网站搬瓦工...