M60 广播、电视网综合 标准查询与下载

ITU-R SM.1140-1995 87-108MHz频段的声音广播业务和108-118MHz频段的航空业务之间的兼容性确定使用的测量航

that, in order to ensure the efficiency of spectrum utilization, there is a need to assess the compatibility between the sound-broadcasting service in the band of about 87-108 MHz and the aeronautical radionavigation services in the band 108-118 MHz

TEST PROCEDURES FOR MEASURING AERONAUTICAL RECEIVER CHARACTERISTICS USED FOR DETERMINING COMPATIBILITY BETWEEN THE SOUND-BROADCASTING SERVICE IN THE BAND OF ABOUT 87-108 MHz AND THE AERONAUTICAL SERVICES IN THE BAND 108-118 MHz

ITU-R BO.789-2-1995 1400-2700M频段内广播卫星业务(声音)针对车载台、便携和固定接收机的数字声音广播业务

that there is an increasing requirement worldwide for suitable means of broadcasting a range of sound qualities up to high-quality stereophonic two-channel/multi-channel sound with subjective quality indistinguishable from high-quality consumer digital r

Service for Digital Sound Broadcasting to Vehicular Portable and Fixed Receivers for Broadcasting-Satellite Service (Sound) in the Frequency Range 1 400- 2 700 MHz

ARINC 752-1 ITEM 6.0-1995 天线设计

Antenna Design

Antenna Design

ITU-R BT.815-1 FRENCH-1994 显示对比度的测量值信号规格

The ITU Radiocommunication Assembly considering that a reliable method to measure the contrast ratio of various displays is required; that the use of different signals can lead to different results; that the measurement of the contrast ratio should be carried out using a signal with an average picture level (APL) as close as possible to normal programme pictures.

Specification of a signal for measurement of the contrast ratio of displays

ITU-R RAPPORT BS.2002 FRENCH-1994 在WARC-92标准频率分配和互补地面数字声广播的介绍

Introduction of Satellite and Complementary Terrestrial Digital Sound Broadcasting in the WARC-92 Frequency Allocations

ITU-R BT.802-1 SPANISH-1994 根据推荐性规范ITU-R BT.601产生的数字编解码器传送信号主观评定的测试图象和顺序

The ITU Radiocommunication Assembly considering a) that digital signals defined according to Recommendation ITU-R BT.601 are required to be transmitted through point-to-point transmission links; b) that coding algorithms have been devised and standards established or proposed to enable such transmission to be effected using bit rate reduction techniques; c) that prototype codec equipment using these algorithms is being developed and needs to be assessed; d) that Recommendation ITU-R BT.800 defines the relevant user requirements; e) that bit rate reduction techniques are also being considered for other applications, e.g. recording; f) that the evaluation of such codecs can best be performed on a subjective basis, due to the complex and adaptive natures of the multi-dimensioned impairments introduced by bit rate reduction; g) that subjective testing methods are defined in Recommendations ITU-R BT.500 and ITU-R BT.800; h) that the selection of appropriate test material is a key step in the planning of subjective assessment and that when results are to be correlated between a number of testing sites or groups the same pictures should be used and should be available at the highest level of quality; j) that the availability of digital recording according to Recommendation ITU-R BT.657 enables a consistent level of high quality to be achieved in the compilation of subjective test sequences.

Test Pictures and Sequences for Subjective Assessments of Digital Codecs Conveying Signals Produced According to Recommendation ITU-R BT.601

ITU-R BT.1123 SPANISH-1994 在甚高频(VHF)/特高频(UHF)波段的625线地面电视的规划方法

The ITU Radiocommunication Assembly considering is provided using the minimum number of frequencies; that broadcasting transmitter networks should be planned in such a way that the required coverage of the area remodelling existing ones; line systems, that the theory of uniform transmitter networks is useful for designing new transmitter networks or that while well-established networks exist, there is still a need for guidance on planning methods for new 625.

PLANNING METHODS FOR 625-LZNE TERRESTRIAL TELEVISION IN VHF/UHF BANDS

ITU-R BT.1123 FRENCH-1994 在甚高频(VHF)/特高频(UHF)波段的625线地面电视的规划方法

The ITU Radiocommunication Assembly considering is provided using the minimum number of frequencies; that broadcasting transmitter networks should be planned in such a way that the required coverage of the area remodelling existing ones; line systems, that the theory of uniform transmitter networks is useful for designing new transmitter networks or that while well-established networks exist, there is still a need for guidance on planning methods for new 625.

PLANNING METHODS FOR 625-LINE TERRESTRIAL TELEVISION IN VHF/UHF BANDS

ITU-R QUESTION 55/6-1994 使用数字技术的广播中音质的主观评价

The ITU Radiocommunication Assembly considering: a) that the introduction of digital techniques in the studio, in transmission circuits and at the transmitter should allow an improvement in quality and more efficient operational use; b) that these techniques entail their own specific signal impairments; c) that it is desirable to ensure high quality performance throughout the broadcasting chain without unnecessary expense.

Subjective assessment of sound quality in broadcasting using digital techniques

ITU-R BT.815-1 SPANISH-1994 显示对比度的测量值信号规格

The ITU Radiocommunication Assembly considering that a reliable method to measure the contrast ratio of various displays is required; that the use of different signals can lead to different results; that the measurement of the contrast ratio should be carried out using a signal with an average picture level (APL) as close as possible to normal programme pictures.

Specification of a signal for measurement of the contrast ratio of displays

ETSI ETR 140-1994 电视系统.复用模拟分量(MAC)/分组业务的业务识别(SI)编码分配

Television Systems; Allocation of Service Identification (SI) Codes for Multiplexed Analogue Component (MAC)/Packet Services

GY 5005-1993 广播电影电视建设项目的设计文件编审办法

Method of reading and editing files on design for construction projects for broadcasting, film and television

ITU-T G.111 SPANISH-1993 国际连接的响度评定值(LRs)(12号研究组)21pp

Clauses 1 to 5 of this Recommendation apply in general to all-analogue, mixed analogueídigital and all-digital international telephone connections. However, where Recommendations are made on specific aspects in clause 6 for mixed analoguddigital or all-digital connections, clause 6 will govern.

Loudness Ratings (LRs) in an International Connection (Study Group XII) 21 pp

ITU-T N.62 FRENCH-1993 在电视传输前的调测周期内进行的测试.国际播音节目及电视传输电路的维护.4号研究组;9pp

This Recommendation provides test objectives for use by International Television Centres prior to a television transmission, for both circuit sections and links, using either satellite or terrestrial facilities or both.

Tests to Be Made During the Line-up Period That Precedes a Television Transmission

ITU-T G.121 FRENCH-1993 国内系统的响度评定值(LRs).12号研究组

Clauses 1 to 5 of this Recommendation apply in general to all analogue, mixed analogue/digital and all-digital international telephone connections. However, where recommendations are made on specific aspects in clause 6 for mixed analogue/digital or alldigital connections, clause 6 will govern.

Loudness Ratings (LRs) of National Systems Study Group 12

ITU-T G.121 SPANISH-1993 国内系统的响度评定值(LRs).12号研究组

Clauses 1 to 5 of this Recommendation apply in general to all analogue, mixed analogue/digital and all-digital international telephone connections. However, where recommendations are made on specific aspects in clause 6 for mixed analogue/digital or alldigital connections, clause 6 will govern.

Loudness Ratings (LRs) of National Systems Study Group 12

ITU-T G.122 FRENCH-1993 国内系统对国际连接的稳定度,发话回声的影响.12号研究组

The information provided in this Recommendation applies to all national systems.

Influence of National Systems on Stability and Talker Echo in International Connections Study Group 12

ITU-T G.122 SPANISH-1993 国内系统对国际连接的稳定度,发话回声的影响.12号研究组

The information provided in this Recommendation applies to all national systems.

Influence of National Systems on Stability and Talker Echo in International Connections Study Group 12

ITU-T N.60 FRENCH-1993 视频信号在视频互联点的名义振幅.国际播音节目及电视传输电路的维护(4号研究组)6pp

This Recommendation provides the guidance on the nominal amplitude of picture signals.

Nominal Amplitude of Video Signals at Video Interconnection Points

ITU-T N.60 SPANISH-1993 视频信号在视频互联点的名义振幅.国际播音节目及电视传输电路的维护(4号研究组)6pp

This Recommendation provides the guidance on the nominal amplitude of picture signals.

Nominal Amplitude of Video Signals at Video Interconnection Points