M60 广播、电视网综合 标准查询与下载

ITU-T J.149 SPANISH-2004 视频质量度量(VQM)的准确度及交叉校正的说明方法.9号研究组

Video quality metrics are intended to provide calculated values that are strongly correlated with viewer subjective assessments. This Recommendation provides: a) methods for curve fitting VQM objective values to subjective data in order to facilitate the accuracy calculation and to produce a normalized objective value scale that can be used for cross-correlation between different VQMs; b) an algorithm (based on statistical analysis relative to subjective data) to quantify the accuracy of a given VQM; c) a simplified root mean square error calculation to quantify the accuracy of a VQM when the subjective data has roughly equal variance across the VQM scale; d) a method to plot classification errors to determine the relative frequencies of "false tie", "false differentiation", "false ranking", and "correct decision" for a given VQM.

Method for specifying accuracy and cross-calibration of Video Quality Metrics (VQM)

ITU-T H.242-2004 使用2Mbit/s以内的数字信道在视听终端间建立通信的系统-H系列:视听服务系统基础设施-通信程序

Videophone, videoconferencing and other conversational multimedia services on fixed bit-rate networks (such as ISDN) depend on the multiplex structure described in ITU-T Rec. H.221. The control channel within this multiplex is the so-called BAS position i

System for establishing communication between audiovisual terminals using digital channels up to 2 Mbit/s SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services ?Communication procedures Study Group 16

ITU-T H.460.9 AMD 1-2004 H.323系统在线服务质量的监测报告工作支持 修正1:新附件B:扩展性能度量-H系列:多媒体基础设施

This annex contains an improved set of Voice over IP call performance metrics that are consistent with those defined in the RTP Control Protocol Extended Reports (RTCP XR) [RFC 3611]. The use of a common set of metrics for QoS reporting via call control

Support for online QoS-monitoring reporting within H.323 systems Amendment 1: New Annex B: Extended performance metrics SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Supplementary services for multimedia Study Group 1

ITU-T H.230-2004 音视系统中帧同步控制信号和指示信号-H系列系统:视听服务系统的视听和多媒体系统基础设施-系统方面

Digital audiovisual services are provided by a transmission system in which the relevant signals are multiplexed onto a digital path using the frame structure defined in ITU-T Rec. H.221. In addition to the audio, video, user data and telematic informat

Frame-synchronous control and indication signals for audiovisual systems SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services ?Systems aspects Study Group 16

ITU-T H.460.11-2004 H.323呼叫延迟建立-H系列:多媒体基础设施和视听服务系统-多媒体补充服务 研究组16

This Recommendation defines procedures to provide for delayed call establishment (delayed ringing) functionality within the context of ITU-T Rec. H.323. Delayed call establishment may be used to place a call, query capabilities, perform testing, or perf

Delayed Call Establishment within H.323 Systems SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Supplementary services for multimedia Study Group 16

ITU-T H.460.12-2004 H.323系统中闪烁控制指示器-H系列:多媒体基础设施和视听服务系统-多媒体补充服务 研究组16

Glare, also known as dual seizure, is a condition in which two entities attempt to select the same circuit within the trunk group; in the context of this Recommendation, the two entities are a H.323 Gatekeeper and a PSTN switch. This Recommendation spec

Glare control indicator within H.323 systems SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Supplementary services for multimedia Study Group 16

ITU-T H.460.13-2004 被呼叫用户释放控制-H系列:多媒体基础设施和视听服务系统-多媒体补充服务 研究组16

This Recommendation specifies a mechanism that allows called H.323 Endpoints to signal that only the called user may release the call and that the release of the call by the calling user must be blocked. This is used for emergency call services where th

Called user release control within H.323 systems SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Supplementary services for multimedia Study Group 16

ITU-T H.460.14-2004 H.323多级优先和MLPP支持-H系列:多媒体基础设施和视听服务系统-多媒体补充服务 研究组16

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

Support for multilevel precedence and preemption (MLPP) within H.323 systems SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Supplementary services for multimedia Study Group 16

ITU-T H.460.15-2004 呼叫信令运输信道的悬浮和改向-H系列:多媒体基础设施和视听服务系统-多媒体补充服务 研究组16

This Recommendation specifies a mechanism that allows H.323 entities participating in a stable call to temporarily suspend and later resume the call signalling channel.

Call signalling transport channel suspension& redirection within H.323 systems SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Supplementary services for multimedia Study Group 16

ITU-R BR.1695 FRENCH-2004 高清电视节目评估用国际交换的录制格式

The ITU Radiocommunication Assembly considering that a significant number of recordings are exchanged by broadcasting organizations for purposes of evaluation of high-definition television (HDTV) programmes; that HDTV programme evaluation may include audio signals which include surround sound; that there are cases when HDTV programme evaluation does not require a full appreciation of picture quality, while in other cases such an appreciation is required; that evaluation of analogue programmes employs comparatively inexpensive and robust formats which are also easily operated; that, in the absence of a firm purchase commitment on the part of the recording recipient, holders of intellectual property rights to such HDTV programmes may be reluctant to provide the recipient with a high-quality copy of their programmes; that the recording formats chosen for the purpose of programme evaluation should provide.

Recording formats for international exchange for the evaluation of high-definition television programmes

ITU-R BR.1355-2 SPANISH-2004 电视屏幕上胶片影像电视电影传输评估的观测条件

The ITU Radiocommunication Assembly considering: a) that the evaluation of images on film for their use in television involves a subjective assessment process where the assessor is affected by the viewing condition; b) that the conversion of images from film to television often needs extensive correction for system adaptation; c) that the viewing condition will affect the operator’s visual adaptation and thus influence the transfer of film images to video; d) that subjective assessment and image correction should be carried out on a properly aligned television monitor.

Viewing conditions for the assessment of telecine transfers of film images on a television display

ITU-R REPORT M.2038-2004 技术趋势

This Report provides information on many of the technology trends concerning radio access networks foreseen at the time of preparation of Recommendation ITU-R M.1645.

Technology trends

ITU-R QUESTION 111-1/6-2004 交互式广播系统(电视,声音和数据)中终端用户隐私保护的技术方法

The ITU Radiocommunication Assembly considering a) that the determination of what is private information varies by administration, and therefore the technical means to protect such information may vary as well; b) the progress in information processing, storage and transmission technology; c) the development of digital broadcasting transmission channels (e.g. satellite master antenna, terrestrial relay or direct satellite and terrestrial reception) in combination with interaction/return channel techniques (e.g. return channel satellite (RCS), return channel terrestrial (RCT), wireless communication networks); d) that interactivity could effectively extend the capability of broadcast receivers to provide bi-directional services such as Internet access, e-mailing, e-commerce, etc.; e) the development of return channel techniques for receiving vision, sound and data from the user (programme-related and non-programme-related); f) that interactive broadcasting services are expected to be broadly deployed; g) that broadcasting signals are generally not targeted to specific individuals or specific groups but are for reception by everybody (sometimes subject to special payments); h) that use of the return channel can result in users’ information, some of which may be considered private, being transmitted to those involved in the provision of the service.

Technical methods for the protection of the privacy of end-users in interactive broadcasting systems (television sound and data)

ITU-R BR.1695 SPANISH-2004 高清电视节目评估用国际交换的录制格式

The ITU Radiocommunication Assembly considering: a) that Recommendation ITU-R BR.602 specifies provisions for the international exchange of recordings for evaluation of programmes in the 625-lines and 525-lines systems; b) that a significant number of recordings are exchanged by broadcasting organizations for purposes of evaluation of high-definition television (HDTV) programmes; c) that HDTV programme evaluation may include audio signals which include surround sound; d) that there are cases when HDTV programme evaluation does not require a full appreciation of picture quality, while in other cases such an appreciation is required; e) that evaluation of analogue programmes employs comparatively inexpensive and robust formats which are also easily operated; f) that, in the absence of a firm purchase commitment on the part of the recording recipient, holders of intellectual property rights to such HDTV programmes may be reluctant to provide the recipient with a high-quality copy of their programmes; g) that the recording formats chosen for the purpose of programme evaluation should provide a reliable and consistent performance, adequate for such purpose.

Recording formats for international exchange for the evaluation of high-definition television programmes

ITU-R QUESTION 89-1/6-2004 电子新闻收集的用户需求

The ITU Radiocommunication Assembly considering a) that electronic news gathering (ENG) crews must be able to operate in all parts of the world, and in all venues where a news event breaks; b) that news coverage produced by ENG crews must be delivered to the appropriate television facility, which is often remote from the area where the crews operate; c) that delivery of news coverage may be effected, depending on circumstances: by physical delivery of recorded ENG videocassettes; by transmission of the signal over portable microwave links; by injection of the signal in a switched telecommunication network; by satellite transmission; d) that the user requirements specific to ENG operation in terms of: received picture quality; received sound quality; number of sound channels; transmission channel bandwidth and reliability; equipment size and weight; talkback facilities, etc.; are often different from those that apply to normal television contribution transmission, and they are peculiar to the operating environment of ENG; e) that such user requirements are generally independent from the delivery method used.

User requirements for electronic news gathering

ITU-R BS.1679 SPANISH-2004 对应用于剧院环境的大屏幕数字成像系统的音频质量的主观评价

This Annex provides a summary of the provisions that should be implemented when performing subjective assessment tests of audio quality or audio impairment for LSDI applications designed for program presentation in a theatrical environment

Subjective assessment of the quality of audio in large screen digital imagery applications intended for presentation in a theatrical environment

ITU-R BS.1693 FRENCH-2004 自动哼唱检索系统性能测试的过程

The Recommendation considering that that metadata will be accompanying most audio broadcast transmissions in the future; that the automatic generation of metadata will be necessary to offer a complete, cost-efficient service in future; that query-by-humming systems enable a natural way to query audio databases.

Procedure for the performance test of automated query-by-humming systems

ITU-R QUESTION 69-1/6-2004 存在反射信号的情况下提供令人满意的电视业务所需的条件

The ITU Radiocommunication Assembly considering a) that reflected signals can be generated by re-radiating structures such as tall buildings or tall antenna structures; b) that receiving antenna directivity is sometimes ineffective in eliminating reflected signals; c) that reflected signals can be also generated on cable distribution systems and collective antenna systems; d) that reflected signals can impair the received television picture and can also adversely affect reception of additional broadcasting services; e) that it is possible to cancel reflected signals by means of automatic circuits in the receiver; f) that reflected signals may have a different effect on analogue and digital television signals, g) that reflected signals may have different effects depending on different digital modulation systems.

Conditions for a satisfactory television service in the presence of reflected signals

ITU-R BS.1693 SPANISH-2004 自动哼唱检索系统性能测试的过程

The Recommendation considering that that metadata will be accompanying most audio broadcast transmissions in the future; that the automatic generation of metadata will be necessary to offer a complete, cost-efficient service in future; that query-by-humming systems enable a natural way to query audio databases.

Procedure for the performance test of automated query-by-humming systems

ITU-R BS.1679 FRENCH-2004 对应用于剧院环境的大屏幕数字成像系统的音频质量的主观评价

This Annex provides a summary of the provisions that should be implemented when performing subjective assessment tests of audio quality or audio impairment for LSDI applications designed for program presentation in a theatrical environment

Subjective assessment of the quality of audio in large screen digital imagery applications intended for presentation in a theatrical environment