1、STDXSI BS EN bLLqb-3-ENGL L7 II LbZLibbS Obb7837 bTq H BRITISH STANDARD Video cameras (PAL/SECAM/NT SC) - Methods of measurement Part 3. Non-broadcast camera-recorders The European Standard EN 6114fX : 1997 has the stus of a British Standard ICs 33.160.40 BS EN 61146-3 : 1997 IEC 61146-3 : 1997 - ST
2、D-BSI BS EN bLLqb-3-ENGL 1997 m Lb24bb9 Obb7838 530 Amd. No. BS EN 611463 : 1997 Date Text affected This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1997
3、 National foreword This British Standard is the English language version of EN 61146:3 : l997.1i is identical with IEC 61146-3 : 1997. The UK participation in its preparation was entrusted by Technical Conuiiiltt e EPIJ100, Audio, video and multimedia systems and equipment, to Subcoiwnittee EPIJ100/
4、2, Recording, which has the responsibility to: - aid enquirem to understand the text; - present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European developme
5、nts and pi-orrtr ilgate them in the UK IEC 61146 consists of the following pasts: Part 1: Non-broadcast singie-sensor meras Part 2: %o and three sensor professional cameras Part 3 Non-broadcast camera-recorders Part 4 Automatic functions of video cameras and camera recorders A iist of organizations
6、represented on this subcommittee can be obtained on request to its seere-. From 1 January 1997, ail IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the
7、othw, publications may contain identifiers from both systems. Cross-references Attention is rawn to the fact that CEN and CENELEC Standards noiItially include an annex which lists normative references to international publications with their corresponding European publications. The British Standards
8、 which implement tlicse international or European publications may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find faciliw of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of i
9、tself confer immiinity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title pig, pages 2 to 40, an inside back cover and a back cover. Amendments issued since publication O BSI 1997 ISBN O 680 28872 2 EN 61146-3 EUROPEAN STANDARD NORME E
10、UROPENNE EUROPISCHE NORM October 1997 ICs 33.1 60.40 Descriptors: Video recording, recording device, camera recorder, measurement method, characteristics, classification English version Video cameras (PAL/SECAM/NTSC) - Methods of measurement Part 3: Non-broadcast camera-recorders (IEC 6 1 1 46-3: 1
11、997) Camras vido (PAL/SECAM/NTSC) Mthodes de mesure Partie 3: Camscopes hors de la radiodiffusion (CE1 61 146-31997) Videokameras (PAL/SECAM/NTSC) Meverf ahren Teil 3: Kamerarecorder fr den Gebrauch auerhalb des Rundfunks (IEC 61 146-31997) This European Standard was approved by CENELEC on 1997-1 0-
12、01. CENELEC members are bound to comply with the CENCENELEC 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 obtain
13、ed on application to the Central Secretariat 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
14、 Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Gemany. Greece, Iceland, Ireland. Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CE
15、NELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 1997 CENELEC - All rights of exploitation in any form and by any means reserved wo
16、rldwide for CENELEC members. Ref. No. EN 61 146-3:1997 E Page 2 EN 61146-3 1997 Foreword The text of document 100B/52/FDISr future edition 1 of LEC 61 146-3, prepared by SC 1008, Recording, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vo
17、te and was approved by CENELEC as EN 61 146-3 on 1997-1 0-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-07-01 - latest date by which the national standards confli
18、cting with the EN have to be withdrawn (daw) 1998-07-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annex A is informative. Annex ZA has been added by CENELEC. Endors
19、ement notice The text of the International Standard IEC 61 146-3:1997 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN bLL4b-3-ENGL 1777 D lb24bb Ubb78qL 025 m II . * * ui Page 3 EN 61146-3 : 1997 CONTENTS Page INTRODUCTION . 5 Clause 1 General . 6 1.1 Scope 6 1
20、.2 Normative references . 6 1.3 Conditions . 7 2 Video characteristics of the complete unit 8 3 Video characteristics related to the camera part only 9 4 Other anomalies due to the recorder section . 9 4.1 Chrominance to luminance intennodulatbn (PAUNTSC) 9 4.2 Luminance to chrominance crosstalk and
21、 moirs 10 4.3 Luminance to chrominance displacement . 11 4.4 Assembly edit system . 12 4.5 Insert edit system 15 4.6 Tape damage in pause mode . 15 5 Time base . 15 6 Audio characteristics 6.1 6.2 Ampiudelirequency response . 6.3 Harmonic distortion . 6.4 Wow and flutter . 6.5 6.6 6.8 6.9 Audio FM r
22、ecording Signal-to-noise ratio (automatic gain control (AGC) on) . AGC operation range and hold time . Directional response of the microphone . 6.7 Audio dub or insert quality (audio hole) Hi-fi audio tracking accuracy . 15 15 16 17 17 17 18 19 21 22 7 Viewfinder screen luminance 22 8 Automatic syst
23、em and others . . 22 8.2 Automatic focusing . 22 8.1 Automatic exposure 22 9 Classification 22 9.1 General . 22 9.2 Classification of the characteristics to be specified 23 Q BSI 1997 STD-BSI BS EN bLLqb-3-ENGL 1777 Lb24bb7 Obb7842 TbL Page 4 EN 61146-3 : 1997 Page Figures 1 2 3 4 5 6 7 8 9 Chromina
24、nce to luminance intermodulation (PAUNTSC) Luminance to chrominance crosstalk and moirs Subcarrier band-pass filter characteristics . Output signal of band-pass filter Luminance to chrominance displacement . Block diagram of the circuit arrangement for video timing of the edit system . frame timing
25、of the start time . Frame timing of the overwrite frame number (1) . Frame timing of the overwrite frame number (2) . 1 O Circuit arrangement for measurement of audio characteristics 1 1 Amplituddfrequency response 12 Circuit arrangement for measurement ofsignal-to-noise ratio (AGC on) 13 Circuit ar
26、rangement for measurement of AGC operation range and hold time . 14 Curve showing output level as a function of input level . 15 Hold time . 16 Directional response of the microphone 17 Polar diagram of microphone sensitiv ty 19 Timing chart of the hole or the overlap at a record pause or insert poi
27、nt 21 Circuit arrangement for measurement of hi-fi audio tracking accuracy . 22 Time difference between the video and audio signals 18 Block diagram of test system : . 20 Timing chart of the hole or the overlap at the insertion and the dubbed point 24 24 25 25 26 29 29 30 30 31 31 32 33 33 34 34 35
28、35 36 36 37 37 Annex A . Bibliography . with their corresponding European publications . 38 Annex ZA (normative) Normative references to intemational publications 39 Q BS1 1997 Page 5 EN 61146-3 : 1997 INTRODUCTION A camera-recorder is a combination of several devices, such as a video camera, video
29、recorder, microphone and an electronic or through-the-lens (TTL) viewfinder. The appropriate measurements should be adopted for the following cases: a) The camera section only is used as a video camera in the monitoring mode. The methods of measurement should be in accordance with IEC 61 146-1. b) T
30、he camera-recorder has both a playback capability and an audio-video micro- phonekamera output, which may be electronics-to-electronics (E to E), passing through the recorder, but not recorded on the tape. Audio and video inputs may, or may not, be provided. The methods of measurement of all charact
31、eristics of the complete unit should be in accordance with this standard. c) The camera-recorder has no playback facility. The tape containing the test signals is played back on a high quality calibrated player. Measurements are made on the playback signal in accordance with this standard. STD.BS1 B
32、S EN bLZqb-3-ENGL 1777 m Lb2qbb Obb7844 834 m Page 6 EN 61146-3 : 1997 VIDEO CAMERAS (PAUSECAM/NTSC) - METHODS OF MEASUREMENT - Part 3: Non-broadcast camera-recorders 1 General 1.1 Scope The measuring methods described in this part of IEC 61146 concern the assessment of the performance of non-broadc
33、ast camera-recorders (NTSC/PAUSECAM). The appropriate measurements are to be applied according to whether the camera-recorder has a tube or semi- conductor camera. In the case of a camera-recorder without playback capability, the details of the separate player used for the measurements shall be stat
34、ed. In this standard, the characteristics apply to the camera-recorder as a complete entity. This standard defines test patterns and measurement conditions so as to enable the comparison of the results of measurements. The standard does not specify limiting values for the various quantities for acce
35、ptable performances, since that is not the object of this standard. The methods of measurement are designed to enable the assessment of the performance of the camera-recorder by using the lens for input and any available output from the device (e.g. separate luminance and chrominance signals or comp
36、osite signal output). 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61 146. At the time of publication, the editions indicated were valid. All normative documents are subject to revision,
37、 and parties to agreements based on this part of IEC 61146 are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60068-1 : 1988, Environme
38、ntal testing - Part 1: General and guidance IEC 601 07-1 : 1977, Recommended methods of measurement on receivers for television broad- cast transmissions - Part 1: General considerations - Electrical measurements other than those at audio-frequencies IEC 60268-1 : 1985, Sound system equipment - Part
39、 1: General IEC 60268-4: 1972, Sound system equipment - Part 4: Microphones IEC 60268-8: 1973, Sound system equipment - Part 8: Automatic gain control devices IEC 60386: 1972, Method of measurement of speed fluctuations in sound recording and reproducing equipment IEC 60735: 1991, Measuring methods
40、for video tape properties IEC 60756: 1991, Non-broadcast video tape recorders - Time base stability IEC 61 041 -1 : 1990, Non-broadcast video tape recorders - Methods of measurement - Part 1: General video (NTSC/PAL) and audio (longitudinal) characteristics IEC 61 041 -2: 1994, Non-broadcast video t
41、ape recorders - Methods of measurement - Part 2: Video characteristics chrominance SECAM IEC 61 041 -3: 1993, Non-broadcast video tape recorders - Methods of measurement - Part 3: Audio characteristics for FM recording IEC 61 146-1 :1994, Video cameras (PAUSECAM/NTSC) - Methods of measurement - Part
42、 1: Non-broadcast single-sensor cameras Page 7 EN 61146-3 : 1997 1.3 Conditions 1.3.1 Environmental conditions All measurements shall be carried out within the environmental conditions specified by the manufacturer. The ambient temperature and relative humidity during testing shall be noted with the
43、 test results. Other details of the test environment may be included if relevant. The recommended ambient temperature is 20 OC * 2 “C according to IEC 60068-1. An adequate warm-up time shall be allowed. 1 3.2 Performance of measurement Unless otherwise stated, the measurements shall be carried out a
44、s follows. Measurements of the performance of the complete unit shall be made on the playback signal from the recorder section immediately after recording, on the same unit if it has playback capability. Where a camera output is available, the camera should be set to the optimum conditions before ma
45、king the test recording. Where no camera output is available, it may be necessary to make a series of recordings at different camera settings to establish optimum settings for the camera before making the test recording. Measurements related to camera performance only are assumed not to be affected
46、by the recorder section. These measurements shall be made on the camera output signal only. Where no camera output is available, the measurements shall be made by recording the camera signals on the video tape and making the measurements on the playback signal. The above-mentioned measurements shall
47、 be made when the camera is shooting the test chart appropriate to the characteristic to be measured. Each test pattern used shall be specified, together with the lighting conditions (illumination intensity, correlated colour temperature, etc.). Automatic measurement methods are under development an
48、d consideration. 1.3.3 Conditions of shooting Unless otherwise stated the conditions shall be as follows. The subject illumination of a reflective test chart shall be 2 O00 Ix * 5 %. The luminance of a transparent test chart, at peak white, shall be 636 cdlm2 f 5 %. The non-uniformity of the subject
49、 illumination shall be less than 5 %. The correlated colour temperature of the light source shall be 3 100 K * 100 K. The white balance of the unit under test shall be set manually or automatically to 3 100 K i 100 K. The test chart shall be shot by the camera so that the frame delineated by the arrows exactly coincides with the edges of the picture displayed on the video monitor in underscan mode. The focus control shall be in auto or manual mode with optimum focus setting. The iris control shall be in auto or manual mode. In order to obtain the d
