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Documents of the CCIR (Oslo, 1966): Volume V

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Documents of the CCIR (Oslo, 1966): Volume V This electronic version (PDF) was scanned by the International Telecommunication Union (ITU) Library & Archives Service from an original paper document in the ITU Library & Archives collections. La présente version électronique (PDF) a été numérisée par le Service de la bibliothèque et des archives de l'Union internationale des télécommunications (UIT) à partir d'un document papier original des collections de ce service. Esta versión electrónica (PDF) ha sido escaneada por el Servicio de Biblioteca y Archivos de la Unión Internacional de Telecomunicaciones (UIT) a partir de un documento impreso original de las colecciones del Servicio de Biblioteca y Archivos de la UIT. (ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版（PDF版本）由国际电信联盟（ITU）图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union INTERNATIONAL RADIO CONSULTATIVE COMMITTEE C.C.I.R. DOCUMENTS OF THE Xlth PLENARY ASSEMBLY OSLO, 1966 VOLUME V SOUND BROADCASTING TELEVISION Published by the INTERNATIONAL TELECOMMUNICATION UNION GENEVA, 1967 March, 1969 ADDENDUM No. 3 ) to VOLUME V OF THE DOCUMENTS OF THE Xlth PLENARY ASSEMBLY OF THE C.C.I.R. Oslo, 1966 Note by the Director, C.C.I.R. During the Interim Meeting of the CMTT (Joint Study Group for television transmissions), Geneva, 1968, it was decided that, in view of the urgency of starting work on the problems con­ tained therein, the texts of a new Question and a new Study Programme should be submitted for ' adoption by correspondence, in accordance with Article 14, § 2(1) of the International Telecom­ munication Convention, Montreux, 1965. These texts have each received more than the twenty approvals necessary for their adoption from the Members and Associate Members of the I.T.U. and have, in consequence, become an official Question and Study Programme of the C.C.I.R. (see Administrative Circular A.C./130 of 6 February, 1969). These texts are: — Question 4-11 CM TT and — Study Programme 4-1A/CMTT, which are reproduced separately on sheets numbered 382p and 382*7. — 382 p — QUESTION 4-1/CMTT DIFFERENCES IN TRANSMISSION TIME BETWEEN THE SOUND AND VISION COMPONENTS OF A TELEVISION SIGNAL (1963, 1966, 1968) The C.C.I.R., CONSIDERING (a) that the time of transmission of television signals over a terrestrial or a communication- satellite system is not generally negligible; (b) that, if the sound and vision signals are transmitted by different methods or routes, there may be an error of timing between the sound and vision signals at the receiving end; d e c id e s that the following question should be studied: 1. what differences in transmission time can be accepted between the sound and vision com­ ponents of a television signal (see Note); 2. what methods may be used to ensure that the acceptable differences in transmission time are not exceeded ? Note. — A similar problem exists in connection with sound and picture recording on the same base (see Draft Recommendation E.l.a(X)*, § 3.2.2). STUDY PROGRAMME 4-1A/CMTT TRANSMISSION OF SOUND AND VISION SIGNALS BY TIME-DIVISION MULTIPLEX (1968) The C.C.I.R., CONSIDERING. (a) that if the sound and vision components of a television signal are transmitted over different routes or by different methods there may be an error of timing between the signals at the receiving end; (b) that one method of minimizing this problem would be to transmit both signals over the same circuit by multiplexing; * Intended to replace Recommendation 265-1. — 382 q — (c) that the study of systems of frequency multiplexing is associated with Draft Question F.5.h(IX)* and Question 18/X and certain information related to these systems is contained in Recom­ mendation 402 and Draft Reports F.5.d(IX)** and E.2.g(X)***; d e c id e s that the following studies should be carried out: 1. techniques which can be used to enable a sound signal to be transmitted in time-division multi­ plex with the vision signal; 2. standards of performance that can be obtained by the use of these techniques; 3. special problems or requirements that might be introduced if these techniques were to be adopted for the international transmission of sound and vision signals. * Intended to replace Question 3/IX. ** Intended to replace Report 289. *** Intended to replace Report 403. August 1968 ADDENDUM No. 2 to VOLUME V OF THE DOCUMENTS OF THE Xlth PLENARY ASSEMBLY OF THE C.C.I.R. Oslo, 1966 Note by the Director, C.C.I.R. During the Interim Meeting of Study Group X (Sound broadcasting), Palma de Mallorca, 1968, it was decided that the texts of five new Questions and six new Study Programmes should be submitted for adoption by correspondence, in accordance with Article 14, §2 (1) of the Inter­ national Telecommunication Convention, Montreux, 1965. Each of these texts has received more than the twenty approvals, necessary for their adop­ tion from the Members and Associate Members of the I.T.U. and they have, in consequence, now become official Questions and Study Programmes of the C.C.I.R. (see Administrative Circular AC/112 of 10 January 1968). These texts are: — Questions 21IX, 22/X, 23IX, 24fX and 251X, which are reproduced on separate sheets num­ bered 318a to 318c — Study Programmes 25A/X, 25B/X, 25C/X, 25D/X, 25E/X and 25F/X, which are reproduced on separate sheets numbered 318d to 318g The texts of Question 25/X and its associated Study Programmes 25A/X-25F/X are intended to replace the existing texts of Questions 8/X, 9/X, 10/X and 12/X together with Study Pro­ grammes 8A/X and 12A/X. The Xllth Plenary Assembly of the C.C.I.R. will therefore be requested to consider the deletion of these texts. — 318 a — QUESTION 21/X MAGNETIC SOUND RECORDING AND REPRODUCING STANDARDS FOR THE INTERNATIONAL EXCHANGE OF TELEVISION PROGRAMMES ON FILM Recording and reproducing characteristics for 16 SEPMAG and 16 COMMAG The C.C.I.R., (1968) \ CONSIDERING (a) that Recommendation 265-1 specifies that for 16 COMMAG the recording and reproducing characteristics should be that standardized by the C.C.I.R. for magnetic tape for a speed of 19.05 cm/s except for the time constant which is 100 /xs (see Recommendation 261-1); (b) that this recommended standard has not been universally adopted; (c) that the present multiplicity of standards for magnetic sound on 16 mm film recording and reproduction creates difficulties within broadcasting organizations; d e c id e s that the following question should be studied: should a compromise between the I.S.O. and S.M.P.T.E. recording and reproducing charac­ teristics, such as the 70 /xs time constant specified in Recommendation 261-1, be adopted for both 16 COMMAG and 16 SEPMAG film? QUESTION 22/X RECORDING OF COLOUR TELEVISION SIGNALS ON FILM The C.C.I.R., (1968) CONSIDERING (a) that colour films are a medium for the international exchange of colour television programmes, as stated in Report 406, § 6.8; (b) that direct filming of programmes is not always possible for technical and economic reasons; (c) that no simple, satisfactory system seems to be available in practice for recording colour television programmes on colour film; d e c id e s that the following question should bfe studied: 1. what system or systems are most satisfactory for producing colour films from a live colour television programme or from one recorded on magnetic tape; 2. what are the optimum recording characteristics which would meet the standards that may be adopted for films intended for the international exchange of colour programmes ? — 318 b — QUESTION 23/X STANDARDS FOR THE INTERNATIONAL EXCHANGE OF COLOUR TELEVISION PROGRAMMES Film recording and reproducing The C.C.I.R., (1968) CONSIDERING that it is desirable to define: (a) the colour balance for both 16-mm and 35-mm films; (b) the conditions of projection for the assessment of both 16-mm and 35-mm colour films; (c) the density range of the film and the telecine characteristics for optimum reproduction of colour films; d e c id e s that the following question should be studied : 1. at which colour temperature should films intended for television and used fordnternational programme exchanges be balanced; 2. what are the optimum conditions of projection for assessment of colour films intended for tele­ vision; 3. what are the suitable maximum and minimum densities of colour films intended for television; 4. what are the optimum telecine reproducing characteristics for use with colour television films; 5. to what extent can the various telecine reproducing characteristics be modified, to meet the optimum standard referred to in § 4? QUESTION 24/X METHODS OF SYNCHRONIZING VARIOUS RECORDING AND REPRODUCING SYSTEMS The C.C.I.R., „ (1968) CONSIDERING (a) that Question 18/X concerns the simultaneous transmission of two sound channels in television; (b) that present television tape recorders provide for only one sound channel of broadcast quality; (c) that in other cases, also, it may be necessary to synchronize a number of audio and/or video signals with each other; (d) that no single method or system is in general use which will meet all the different possible requirements for synchronization; — 318 c — decides that the following question should be studied: 1. what are the required capabilities of such methods of synchronizing; 2.
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