BS EN 60933-3-1993 Audio video and audiovisual systems - Interconnections and matching values - Specification for interface for the interconnection of ENG cameras and portable VTRsl.pdf

1、BRITISH STANDARD BSEN 60933-3:1993 IEC933-3: 1992 Audio, video and audiovisual systems Interconnections and matching values Part3: Specification for interface for the interconnection of ENG cameras and portable VTRs using non-composite signals, for625 line/50 field systems The European Standard EN60

2、933-3:1992 has the status of a British Standard UDC621.397.6:621.317.42:681.327.8BSEN60933-3:1993 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comes intoeffect on 15

3、January1993 BSI11-1999 The following BSI references relate to the work on this standard: Committee referenceEEL/32 Draft for comment88/23485DC ISBN 0 580 21541 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Sta

4、ndard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN6

5、0933-3:1993 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Electrical characteristics of the interface 4 3.1 Programme signals 4 3.2 Power supply (VTR to camera) 6 3.3 VTR start/stop control 6 3.4 Indicati

6、on of recording/VTR fault (TALLY) 6 Annex A (informative) 26-contact connector recommended for new designsofequipment 7 National annex NA (informative) Committees responsible Inside back cover Figure 1 Waveform of video signals for100/0/100/0 colour bars 5 Figure 2 Indication of recording/VTR fault

7、6 Figure A.1 Contact designation 7BSEN60933-3:1993 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Electronic Equipment Standards Policy Committee and is the English language version of EN60933-3:1992 Audio, video and audiovisual systems Interconne

8、ctions and matching values Part3: Interface for the interconnection of ENG cameras and portable VTRs using non-composite signals, for625 line/50 field systems, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC933-3:1992 published by the Inte

9、rnational Electrotechnical Commission (IEC). This Part is based on EBU RecommendationR34. Copies of CCIR documents may be purchased from: BSI Standards, Linford Wood, Milton KeynesMK146LE. Copies of EBU documents may be purchased from: Technical Centre of the European Broadcasting Union, Cas Postale

10、67, CH-1218 Grand-Saconnex, Geneva A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Teleph

11、one:+41(22)7172111 Telefax:+41(22)7985897 Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. Th

12、is will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60933-3 October1992 UDC621.397.6:621.317.42:681.327.8 Descriptors: Video recording, radiocommunications, recording apparatus, motion-picture cameras, video recorders, appliance i

13、nterconnections, interfaces, connectors, characteristics English version Audio, video and audiovisual systems Interconnectionsandmatching values Part3:Interfaceforthe interconnection of ENG cameras and portable VTRs using non-composite signals, for 625line/50 field systems (IEC933-3:1992) Systmes au

14、dio, vido et audiovisuels Interconnexions et valeurs dadaptation Partie3: Interface pour linterconnexion de camras pour le reportage lectronique dactualit et des magntoscopes portatifs, utilisant des signaux non composites, pour les systmes625 lignes/50 trames (CEI933-3:1992) Audio-, Video- und audi

15、ovisuelle Anlagen Verbindung und Anpassungswerte Teil3: Schnittstelle fr die Verbindung von EB-Kameras und tragbaren Videobandgerten fr Komponenten-Signale fr625-Zeilen/50-Halbbilder-Systeme (IEC933-3:1992) This European Standard was approved by CENELEC on1992-06-16. CENELEC members are bound to com

16、ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Se

17、cretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status a

18、s the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland andUnited Kingdom. CENELEC European Committee for Elect

19、rotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1992 Copyright reserved to CENELEC members Ref.No.EN60933-3:1992EEN60933-3:1992 BSI 11-1999 2 Foreword The text of doc

20、ument84(CO)134, as prepared by IEC Technical Committee No.84: Equipment and systems in the field of audio, video and audiovisual engineering, was submitted to the IEC-CENELEC parallel vote in September1991. The reference document was approved by CENELEC as EN60933-3 on16 June1992. The following date

21、s were fixed: For products which have compiled with the relevant national standard before1993-08-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until1988-08-01. latest date of publication ofan identical national standard (dop)

22、1993-08-01 latest date of withdrawal ofconflicting national standards (dow)1993-08-01EN60933-3:1992 BSI 11-1999 3 1 Scope This part of IEC933 defines an interface which is designed to enable the Electronic News Gathering (ENG) signals produced in a non-composite form to be sent through a parallel li

23、nk between a camera and a portable Video Tape Recorder (VTR) which are separated by about5m to10m instead of being combined in a camera-recorder. This part of IEC933 includes the electrical characteristics that the interface will have to satisfy in order to transmit the programme signals produced by

24、 the camera (audio and video components) and those fed back to the viewfinder (video, playback), as well as the operational controls and the monitoring indications. This specification includes only those characteristics considered to be essential to facilitate the interconnection of equipment produc

25、ed by different manufacturers. In order to prevent damage due to incorrect connections, it is necessary to make sure that the equipment concerned complies with this specification, and, furthermore, that the additional connections provided by the manufacturers in the case of particular systems are no

26、t incompatible with this specification. One system has been recommended by the EBU for the recording of non-composite ENG signals (RecommendationR32). The detailed specification of the interface for this system is reproduced in Annex A and the correspondence between the contacts in that case and the

27、 signals taken into account by the EBU is indicated. Signals not specified in this standard (e.g.other audio inputs to the VTR or reference video signals for locking the sync. pulse generator of the camera) should be connected by means of special sockets on the camera or VTR. They are not covered by

28、 this specification, and neither is the composite video interface that may be found on equipment of this type. The merit of this interface does not depend on the use of one particular type of connector. It is sufficient for compatibility that the electrical matching values given in clause3 are obser

29、ved. Manufacturers should provide full details of the connectors used on their equipment and the contact assignments. Attention is drawn to EBU Technical StandardN10 which specifies an interface of four BNC connectors, with the female part mounted on VTRs and other equipment. Nevertheless, it is rec

30、ommended that in new designs, the26-contact connector and contact assignments described in Annex A be used. Each connector on equipment should be fitted only with the contacts which are actually used so that inadvertent connection of signals not provided for in the equipment is prevented. Cord sets

31、should connect all contacts. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of International Standard IEC933. At the time of publication, the editions indicated were valid. All normative documents

32、are subject to revision, and parties to agreements based on this part of International Standard IEC933 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid Internati

33、onal Standards. CCIR Report624-4:1990, Characteristics of television systems. CCIR Report629-4:1990, Digital coding of colour television signals. EBU Technical Standard N10:1989, Parallel interface for analogue component video signals. EBU Recommendation R32:1984, Analogue component recording equipm

34、ent for ENG applications. EN60933-3:1992 4 BSI 11-1999 3 Electrical characteristics of the interface 3.1 Programme signals In practice, component video signals are generally designated by the lettersY,R-Y andB-Y, but in the following, the notation adopted by the CCIR has been used: E y , E CRand E C

35、B . Luminance signal (camera to VTR) The luminance signal is the same as that defined in CCIR Report624-4. In accordance with TableII of that report, it is obtained from the primary signals by means of the equation: E y=0,299E R +0,587E G +0,114E B where E R , E Gand E Bare the primary signals after

36、 gamma precorrection. In the present application, the amplitude range of the primary signals is0,700V. The luminance signal should include synchronizing pulses and line and field blanking in accordance with CCIR Report624-4 (TableI, TableI.1 and TableI.2). The amplitude of this signal should comply

37、with the following specifications: peak-to-peak amplitude (including sync.):1V; nominal value of the d.c. component:0V at blanking level, or a.c. coupled output; input and output impedance: Z o=Z i=757. Colour difference signals (camera to VTR) The colour-difference signals are obtained from the E y

38、signal and the primary signals specified above. When the amplitude range of the primary signals is0,7V, the colour-difference signals comply with the following equations, which are the same as those given in the CCIR Report629-4: E CR=0,713(E R E y ); E CB=0,564(E B E y ). Both of these signals shou

39、ld include line and field blanking in accordance with CCIR Report624-4 (TableI,TableI.1 and TableI.2). Neither signal should include synchronizing pulses. The amplitude of the E CRand E CBsignals should comply with the following specifications: peak-to-peak amplitude:0,700V for100/0/100/0 colour bar

40、s; 0,525V for100/0/75/0 colour bars; nominal value of the d.c. component:0V at blanking level, or a.c. coupled output; input and output impedance of the interface: Z o=Z i=757. All three signals E y , E CRand E CBshould be simultaneous in real-time and convey time-coincident information. Their chara

41、cteristics are illustrated in Figure 1, page5. The specification does not include any band-limitation for the luminance or colour-difference signals. If necessary, in order to ensure that the equipment operates correctly, such limitation should be applied at the input stages of the equipment. The in

42、sertion of signals during the field blanking period is reserved. The use of lines12/325 in the E CRandE CBsignals to identify the colour fields in the case of preliminary composite processing is, however, under study. The use of other lines in all three signals to carry an amplitude and phase refere

43、nce is also under study. Playback video signal (VTR to camera) The specifications applicable to this signal are as follows: peak-to-peak amplitude (including sync.): 1 V; nominal value of the d.c. component: 0V at blanking level, or a.c. coupled output; input and output impedance: Z o=Z i=757.EN6093

44、3-3:1992 BSI 11-1999 5 A manual switch may be provided on the camera to route this signal to the viewfinder, but it is also possible to provide an automatic switch, the control of which is transmitted through the interface from the VTR. Such a system does not form part of this specification. However

45、, if both automatic and manual switches are provided, the latter should be able to force the viewfinder to show the camera picture, whatever control signal is received from the VTR. Audio signal (camera to VTR) The signal produced by the microphone should comply with the following specification: lev

46、elU60dBu, balanced; Z o=2007, Z i=3k7 to10k7. Figure 1 Waveform of video signals for100/0/100/0 colour barsEN60933-3:1992 6 BSI 11-1999 3.2 Power supply (VTR to camera) Voltage (at the output of the VTR):12V nominal (minimum:10,6V, maximum:17V). The camera should be able to operate with the power su

47、pply provided by the VTR, taking account of the voltage reduction due to the supply cable. However, in order to make allowance for the case of cameras having their own battery, arrangements should be made in the camera to automatically prevent the interconnection of the battery in it with that in th

48、e VTR. 3.3 VTR start/stop control The start/stop control for the VTR should comply with the following specifications: start:5V nominal(4V to8V, CMOS); stop:0V nominal(0 to0,5V, CMOS). 3.4 Indication of recording/VTR fault (TALLY) The appearance of this signal is shown in Figure 2, page6. The specifi

49、cations of this signal are as follows, with an input impedance of Z i=20k7: The signal indicates at the camera whether the VTR is recording or not and also provides information on its operating state. The interface does not make provisions for particular warnings (e.g.battery discharged). All the warnings generated by the system concerned are transmitted by the same signal. Various individual alarms can also be provided at the camera, but they are not covered by this specification.