M62 广播、电视网结构 标准查询与下载

ITU-T Y.1221 APPENDIX III-2004 预发行在区分的业务环境中使用IP转换能力的业务的支持指南 附录3 Y系列 全球信息基础设施和网络协议

The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications.

(Pre-Published) Guidelines for support of services using IP transfer capabilities in differentiated services environment Appendix III: SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT GENERATION NETWORKS Internet protocol a

ITU-R QUESTION 93/6-2004 电子新闻采集的频率要求

The ITU Radiocommunication Assembly considering a) that electronic news gathering (ENG) using portable or transportable equipment is used to support broadcast operations and provides a valuable method of transmission for the rapid acquisition of news for broadcasting; b) that different frequency bands are currently used in different countries for ENG in the terrestrial, fixed and mobile service allocations; c) that the harmonization of the spectrum requirements for ENG would provide greater efficiencies in spectrum usage and equipment interoperability; d) that such harmonization can only be achieved when the technical and operational characteristics of ENG links are investigated further; e) that the use of such links may give rise to sharing difficulties within these bands with existing services which must be protected.

Frequency requirements for electronic news gathering

ITU-R BT.1675-2004 最小化广播系统回路延迟干扰的系统设计和操作实践

This Annex outlines a model for calculating signal delay in programme contribution loops and outlines system design guidelines and operational practices which can be used to minimize the loop delay, minimize the programme degradation arising from loop del

System design and operational practices for minimizing disturbance from loop delay in broadcast systems

ITU-R BT.1674-2004 广播制作和后期制作的元数据要求

that digital broadcasting is bringing fundamental changes to the infrastructure and methods of production and post-production of audio, video and other electronic media

Metadata requirements for production and post-production in broadcasting

ITU-R REPORT BS.2037-2004 评估暴露于非电离辐射的任意频段地面广播传输系统的评估领域

This Report is intended to provide a single basis for the derivation and estimation of the values of electromagnetic radiation from a broadcast station that occur at particular distances from the transmitter site. Using such information, responsible agencies can then develop appropriate standards that may be used to protect humans from undesirable exposure to harmful radiation.

Evaluating fields from terrestrial broadcasting transmitting systems operating in any frequency band for assessing exposure to non-ionizing radiation

ITU-T Y.1271-2004 演进中电路及分组交换网络支持应急通信的网络要求与能力 Y系列 全球信息基础设施和网络协议方面和下一代

Framework(s) on network requirements and capabilities to support emergency telecommunications over evolving circuit-switched and packet-switched networks SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS

Framework(s) on network requirements and capabilities to support emergency telecommunications over evolving circuit-switched and packet-switched networks SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS In

GY/T 196-2003 调频广播覆盖网技术规定

Technical specifications for coverage networks of FM sound broadcasting

ITU-T Y.1281-2003 MPLS的移动IP服务 Y系列 全球信息基础设施和网络协议方面-结构,接入,网络能力和资源管理 研究

In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency.

Mobile IP services over MPLS SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE INTERNET PROTOCOL ASPECTS AND NEXT GENERATION NETWORKS Internet protocol aspects architecture access network capabilities and resource management Study Group 13

ITU-T H.350-2003 多媒体电视目录服务体系结构-H系列:多媒体基础设施和视听服务系统和终端设备 研究组16

This Recommendation describes a directory services architecture for multimedia conferencing using LDAP. Standardized directory services can support association of persons with endpoints, searchable white pages, and clickable dialling. Directory services

Directory services architecture for multimedia conferencing SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services ?Systems and terminal equipment for audiovisual services Study Group 16

ITU-T H.350.5-2003 非标准协议目录服务体系结构-H系列:多媒体基础设施和视听服务系统和终端设备 研究组16

This Recommendation describes an LDAP schema to represent non-standard multimedia communications endpoints, and is meant to provide a very basic framework for representing these elements in a directory.

Directory services architecture for non-standard protocols Study Group 16

ITU-T H.350.3-2003 H.320目录服务体系结构-H系列:多媒体基础设施和视听服务系统和终端设备 研究组16

This Recommendation describes an LDAP schema to represent H.320 endpoints.

Directory services architecture for H.320 Study Group 16

ITU-T H.350.4-2003 SIP目录服务体系结构-H系列:多媒体基础设施和视听服务系统和终端设备 研究组16

This Recommendation describes an LDAP directory services architecture for multimedia conferencing using SIP. In particular, it defines an LDAP schema to represent SIP User Agents (Uas) on the network and associate those endpoints with users.

Directory services architecture for SIP Study Group 16

ITU-T H.350.1-2003 H.323目录服务体系结构-H系列:多媒体基础设施和视听服务系统和终端设备 研究组16

This Recommendation describes an LDAP schema to represent H.323 endpoints. It is an auxiliary class related to ITU-T Rec. H.350 and derives much of its functionality from that architecture. Implementors should review ITU-T Rec. H.350 in detail before proc

Directory services architecture for H.323 Study Group 16

ITU-T H.350.2-2003 H.235目录服务体系结构-H系列:多媒体基础设施和视听服务系统和终端设备 研究组16

This Recommendation describes an LDAP schema to represent H.235 elements.

Directory services architecture for H.235 Study Group 16

ITU-R QUESTION 11/6-2003 地面广播业务中的发射偏振.文件6/1-E

The ITU Radiocommunication Assembly considering a) that emissions from terrestrial broadcasting stations are usually transmitted with either horizontal or vertical polarization; b) that multiple reflections within reception areas in rough terrain and/or in cities with high buildings can result in undesirable effects in the received signal; c) that orthogonal polarization for broadcasting stations operating in the same frequency channel has been used in some areas in discriminating against the reception of undesired signals.

Polarization of emissions in the terrestrial broadcasting service Document 6/1-E

ITU-R BT.1667-2003 基于建议ITU-R BT.1306运行在VHF/UHF广播波段的交互式广播业务的地面返回信道

that substantial progress in digital broadcasting technologies has resulted in the implementation of operating digital broadcasting services

Terrestrial return channel for interactive broadcasting services operating in the VHF/UHF broadcast band based on Recommendation ITU-R BT.1306

ITU-R BT.1614-2003 数字电视接口的视频有效载荷识别

This Standard defines a 4-byte payload identifier that may be added to digital television interfaces for the purpose of identifying the video payload.

Video payload identification for digital television interfaces Question ITU-R 20/6

ITU-R BT.1666-2003 应用于剧院环境的大屏幕数字成像的用户要求

that ITU, as well as other international standardising bodies, is studying a new application called large screen digital imagery (LSDI)

User requirements for large screen digital imagery applications intended for presentation in a theatrical environment

BS EN 60728-3:2006 电视信号、声音信号和交互式设备用电缆网络.第3部分:同轴电缆网的有源带宽设备

General Standards of EN 50083 series deal with cable networks for television signals, sound signals and interactive services including equipment, systems and installations for headend reception, processing and distribution of television and sound signals and their associated data signals and for processing, interfacing and transmitting all kinds of signals for interactive services using all applicable transmission media. All kinds of networks like CATV-networks, MATV-networks and SMATV-networks, Individual receiving networks and all kinds of equipment, systems and installations installed in such networks, are within this scope. The extent of this standardisation work is from the antennas, special signal source inputs to the headend or other interface points to the network up to the system outlet or the terminal input, where no system outlet exists. The standardisation of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals etc.) as well as of any coaxial and optical cables and accessories therefor is excluded. Specific scope of this part 3 This standard applies to all broadband amplifiers used in cable networks; covers the frequency range 5 MHz to 3000 MHz; applies to one-way and two-way equipment; lays down the basic methods of measurement of the operational characteristics of the active equipment in order to assess the performance of this equipment; identifies the performance specifications that shall be published by the manufacturers; states the minimum performance requirements of certain parameters. Amplifiers are divided into the following two quality levels: Grade 1: Amplifiers typically intended to be cascaded. Grade 2: Amplifiers for use typically within an apartment block, or within a single residence, to feed a few outlets. Practical experience has shown these types meet most of the technical requirements necessary for supplying a minimum signal quality to the subscribers. This classification shall not be considered as a requirement but as the information for users and manufacturers on the minimum quality criteria of the material required to install networks of different sizes. The system operator has to select appropriate material to meet the minimum signal quality at the subscriber?s outlet, and to optimise cost/performance, taking into account the size of the network and local circumstances. All requirements and published data are understood as guaranteed values within the specified frequency range and in well matched conditions.

Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for coaxial cable networks

NF C90-101-10:2002 电视信号、声音信号和交互作用服务用电缆网络.第10部分:返回路径的系统性能

Cable networks for television signals, sound signals and interactive services - Part 10 : system performance for return paths.