1、BRITISH STANDARD BS EN 61146-3:1997 IEC 61146-3: 1997 Video cameras (PAL/SECAM/NTSC) Methods of measurement Part 3: Non-broadcast camera-recorders The European Standard EN61146-3:1997 has the status of a British Standard ICS 33.160.40BSEN61146-3:1997 This British Standard, having been prepared under
2、 the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1997 BSI 04-1999 ISBN 0 580 28872 2 National foreword This British Standard is the English language version of EN61146-3:1997. It is identical with IEC61
3、146-3:1997. The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/2, Recording, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/E
4、uropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. IEC61146 consists of the following parts: Part 1: Non-broadcast single-sensor cameras; Part 2: Tw
5、o and three sensor professional cameras; Part 3: Non-broadcast camera-recorders; Part 4: Automatic functions of video cameras and camera recorders; A list of organizations represented on this subcommittee can be obtained on request to its secretary. From1 January1997, all IEC publications have the n
6、umber60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELE
7、C Standards normally include an annex which lists nonnative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitl
8、ed “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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. Complianc
9、e with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2to32, an inside back cover and a back cover. This standard has been updated (see copyright date)
10、 and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61146-3:1997 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61146-3 5ii blankEUROPE
11、AN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61146-3 October 1997 ICS 33.160.40 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-re
12、corders (IEC 61146-3:1997) Camras vido (PAL/SECAM/NTSC) Mthodes de mesure Partie 3: Camscopes hors de la radiodiffusion (CEI 61146-3:1997) Videokameras (PAL/SECAM/NTSC) Meverfahren Teil 3: Kamerarecorder fr den Gebrauch auerhalb des Rundfunks (IEC 61146-3:1997) This European Standard was approved by
13、 CENELEC on1997-10-01. CENELEC members are bound to comply 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 sta
14、ndards may be obtained 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 no
15、tified to the Central Secretariat has the same status as 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
16、and United Kingdom. CENELEC 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
17、 means reserved worldwide for CENELEC members. Ref. No. EN 61146-3:1997 EEN61146-3:1997 BSI 04-1999 2 Foreword The text of document100B/52/FDIS, future edition1 of IEC61146-3, prepared by SC100B, Recording, of IEC TC100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CEN
18、ELEC parallel vote and was approved by CENELEC as EN61146-3 on1997-10-01. The following dates were fixed: 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 infor
19、mative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC61146-3:1997 was approved by CENELEC as a European Standard without any modification. latest date by which the EN has to be implemented at national level by publication of an identical national s
20、tandard or by endorsement (dop) 1998-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-07-01EN61146-3:1997 BSI 04-1999 3 Contents Page Foreword 2 Introduction 1 General 1.1 Scope 5 1.2 Normative references 5 1.3 Conditions 6 2 Video characteris
21、tics of the complete unit 7 3 Video characteristics related to the camera part only 8 4 Other anomalies due to the recorder section 8 4.1 Chrominance to luminance intermodulation (PAL/NTSC) 8 4.2 Luminance to chrominance crosstalkand moirs 9 4.3 Luminance to chrominance displacement 9 4.4 Assembly e
22、dit system 10 4.5 Insert edit system 11 4.6 Tape damage in pause mode 11 5 Time base 11 6 Audio characteristics 12 6.1 Signal-to-noise ratio (automatic gain control (AGC) on) 12 6.2 Amplitude/frequency response 12 6.3 Harmonic distortion 13 6.4 Wow and flutter 13 6.5 AGC operation range and hold tim
23、e 13 6.6 Directional response of the microphone 13 6.7 Audio dub or insert quality (audio hole) 14 6.8 Hi-fi audio tracking accuracy 16 6.9 Audio FM recording 16 7 Viewfinder screen luminance 16 8 Automatic system and others 16 8.1 Automatic exposure 16 8.2 Automatic focusing 16 9 Classification 16
24、9.1 General 16 9.2 Classification of the characteristics to be specified 17 Annex ZA (normative) Normative references to international publications with their corresponding European publications Inside back cover Annex A (informative) Bibliography 32 Page Figure 1 Chrominance to luminance intermodul
25、ation (PAL/NTSC) 18 Figure 2 Luminance to chrominance crosstalkand moirs 18 Figure 3 Subcarrier band-pass filter characteristics 19 Figure 4 Output signal of band-pass filter 19 Figure 5 Luminance to chrominance displacement 20 Figure 6 Block diagram of the circuit arrangement for video timing of th
26、e edit system 23 Figure 7 Frame timing of the start time 23 Figure 8 Frame timing of the overwrite frame number (1) 24 Figure 9 Frame timing of the overwrite frame number (2) 24 Figure 10 Circuit arrangement for measurement of audio characteristics 25 Figure 11 Amplitude/frequency response 25 Figure
27、 12 Circuit arrangement for measurement of signal-to-noise ratio (AGC on) 26 Figure 13 Circuit arrangement for measurement of AGC operation range and hold time 27 Figure 14 Curve showing output level as a function of input level 27 Figure 15 Hold time 28 Figure 16 Directional response of the microph
28、one 28 Figure 17 Polar diagram of microphone sensitivity 29 Figure 18 Block diagram of test system 29 Figure 19 Timing chart of the hole or the overlap at a record pause or insert point 30 Figure 20 Timing chart of the hole or the overlap at the insertion and the dubbed point 30 Figure 21 Circuit ar
29、rangement for measurement of hi-fi audio tracking accuracy 31 Figure 22 Time difference between the video and audio signals 314 blankEN61146-3:1997 BSI 04-1999 5 Introduction A camera-recorder is a combination of several devices, such as a video camera, video recorder, microphone and an electronic o
30、r 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 IEC61146-1. b) The camera-recorder has both a playback cap
31、ability and an audio-video microphone/camera 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 characteristics of the complete unit should be in
32、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. 1 General 1.1 Scope The measuring methods described
33、in this part of IEC61146 concern the assessment of the performance of non-broadcast camera-recorders (NTSC/PAL/SECAM). 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 capabi
34、lity, the details of the separate player used for the measurements shall be stated. 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. T
35、he standard does not specify limiting values for the various quantities for acceptable 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
36、 output from the device (e.g.separate luminance and chrominance signals or composite signal output). 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC61146. At the time of publication, the ed
37、itions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC61146 are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC and ISO maintain registe
38、rs of currently valid International Standards. IEC 60068-1:1988, Environmental testing Part 1: General and guidance. IEC 60107-1:1977, Recommended methods of measurement on receivers for television broadcast transmissions Part 1: General considerations Electrical measurements other than those at aud
39、io- frequencies. IEC 60268-1:1985, Sound system equipment Part 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
40、 reproducing equipment. IEC 60735:1991, Measuring methods for video tape properties. IEC 60756:1991, Non-broadcast video tape recorders Time base stability. IEC 61041-1:1990, Non-broadcast video tape recorders Methods of measurement Part1:General video (NTSC/PAL) and audio (longitudinal) characteris
41、tics. IEC 61041-2:1994, Non-broadcast video tape recorders Methods of measurement Part2:Video characteristics chrominance SECAM. IEC 61041-3:1993, Non-broadcast video tape recorders Methods of measurement Part3:Audio characteristics for FM recording. IEC 61146-1:1994, Video cameras (PAL/SECAM/NTSC)
42、Methods of measurement Part 1: Non-broadcast single-sensor cameras. EN61146-3:1997 6 BSI 04-1999 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
43、 testing shall be noted with the test results. Other details of the test environment may be included if relevant. The recommended ambient temperature is20C 2 C according to IEC60068-1. An adequate warm-up time shall be allowed. 1.3.2 Performance of measurement Unless otherwise stated, the measuremen
44、ts shall be carried out as 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 opt
45、imum conditions before making 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 as
46、sumed not to be affected 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-men
47、tioned measurements shall 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
48、 are under development and 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 be2000lx 5%. The luminance of a transparent test chart, at peak white, shall be636cd/m 25%. The non-uniformity
49、of the subject illumination shall be less than5%. The correlated colour temperature of the light source shall be3100K 100K. The white balance of the unit under test shall be set manually or automatically to3100K 100K. 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 optimu
