1、BRITISH STANDARD BS EN 61146-1:1997 IEC 1146-1: 1994 Video cameras (PAL/SECAM/NTSC) Methods of measurement Part 1: Non-broadcast single-sensor cameras The European Standard EN 61146-1:1996 has the status of a British Standard ICS 33.160.40BSEN 61146-1:1997 This British Standard, having been prepared
2、 under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes intoeffect on 15 March 1997 BSI 01-1999 The following BSI references relate to the work on this standard: Committee reference EPL/100/3 Draft for comment 89/25912 DC ISBN 0 5
3、80 26931 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/3, Equipment and systems in the field of audio, video and audiovisual engineer
4、ing, upon which the following bodies were represented: Association of British Theatre Technicians Audio Engineering Society British Broadcasting Corporation British Educational Suppliers Association British Federation of Audio British Radio and Electronic Equipment Manufacturers Association British
5、Telecommunications plc Federation of the Electronics Industry Independent Television Association (ITVA) Institute of Sound and Communication Engineers Institution of Electrical Engineers International Association of Broadcasting Manufacturers Professional Lighting and Sound Association Royal Institu
6、te of British Architects Royal National Institute for Deaf People Society of Cable Television Engineers Amendments issued since publication Amd. No. Date CommentsBSEN 61146-1:1997 BSI 01-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 61146-1
7、 5 List of references Inside back coverBSEN 61146-1:1997 ii BSI 01-1999 National foreword This British Standard has been prepared by Subcommittee EPL/100/3, and is the English language version of EN61146-1:1996 Video cameras (PAL/SECAM/NTSC) Methods of measurement Part 1: Non-broadcast single-sensor
8、 cameras, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1146-1:1994, published by the International Electrotechnical Committee (IEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of Brit
9、ish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard HD 527S1:1989 (IEC 883:1987) BS 7595:1992 Measuring method for chrominanc
10、e signal-to-noise ratio for video tape recorders Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 88, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments inc
11、orporated. This will be indicated in the amendment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61146-1 September 1996 ICS 33.160.40 Descriptors: Video equipment, motion-picture cameras, measurements, performance evaluation, shot, luminance, test results, compa
12、rison, signal to noise ratio, chrominance, amplitude frequency characteristics, distortion, colour, test chart English version Video cameras (PAL/SECAM/NTSC) Methods of measurement Part 1: Non-broadcast single-sensor cameras (IEC 1146-1:1994) Camras vido (PAL/SECAM/NTSC) Mthodesde mesure Partie 1: C
13、amras monocapteurs hors delaradiodiffusion (CEI1146-1:1994) Meverfahren fr Videokameras (PAL/SECAM/NTSC) Teil 1: Kameras mit einem Aufnahmesensor fr den Gebrauch auerhalbdes Rundfunks (IEC 1146-1:1994) This European Standard was approved by CENELEC on 1996-07-02. CENELEC members are bound to comply
14、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 Secret
15、ariat 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 as th
16、e 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 and United Kingdom. CENELEC European Committee for Electrot
17、echnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 61146-1:1996 EEN61146-1:1996 BSI 01-1999 2 Foreword The text of th
18、e International Standard IEC 1146-1:1994, prepared by TC 84 (transformed into SC100C, Equipment and systems in the field of audio, video and audiovisual engineering, of IECTC100, Audio, video and multimedia systems and equipment), was submitted to the formal vote and was approved by CENELEC as EN611
19、46-1 on1996-07-02 without any modification. 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 A, Annex B, Annex C, Annex D andAnnex ZA are normative and Annex E
20、 is informative. Annex ZA has been added by CENELEC. Contents Page Section 1. General 1 Scope 5 2 Normative references 5 3 Conditions 5 Section 2. Luminance video characteristics 4 Luminance sensitivity 6 5 Luminance resolution 8 6 Luminance signal-to-noise ratio 10 7 Luminance amplitude/frequency r
21、esponse 11 8 Luminance waveform distortion and pulse response 14 9 Luminance gamma characteristics 18 10 Luminance white clipping and compression rate 21 11 Luminance dynamic range and contrast range 21 12 Luminance white non-uniformity 22 Section 3. Chrominance video characteristics 13 Chrominance
22、signal-to-noise ratio 25 14 Chrominance amplitude/frequency response 29 15 White and black balance 31 16 Colour and white reproduction non-uniformity 34 17 Grey-scale non-purity (white tracking error) 35 18 Colour reproduction 41 Section 4. Other characteristics 19 Luminance and chrominance moirs 48
23、 20 Lag 53 21 Sticking (image retention) 59 22 Blooming 59 23 Smearing 62 24 Geometric distortions 65 Annex A (normative) Reference list of test charts 69 Annex B (normative) Arrangement of the CIE colour chips of the colour reproduction test chart 80 Annex C (normative) Trap filter characteristics
24、for PAL, NTSC, and SECAM systems 83 Annex D (normative) Letter symbols 86 Annex E (informative) Bibliography 87 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-06-01 latest date by which the national st
25、andards conflicting with the EN have to be withdrawn (dow) 1997-06-01EN61146-1:1996 BSI 01-1999 3 Page Annex ZA (normative) Normative references to international publications with their corresponding European publications 88 Figure 1 Luminance sensitivity 7 Figure 2 Luminance resolution 9 Figure 3 L
26、uminance signal-to-noise ratio 12 Figure 4 Luminance amplitude/frequency response 13 Figure 5 Luminance waveform distortion and pulse response 15 Figure 6 Luminance gamma characteristics 19 Figure 7 Luminance white clipping and compression rate 23 Figure 8 Luminance white non-uniformity 24 Figure 9
27、Chrominance signal-to-noise ratio PAL/NTSC 27 Figure 10 Chrominance signal-to-noise ratio SECAM 28 Figure 11 Chrominance amplitude frequency response 30 Figure 12 White and black balance PAL/NTSC 32 Figure 13 White and black balance SECAM 37 Figure 14 Colour and white reproduction non-uniformity 38
28、Figure 15 Grey-scale non-purity (white tracking error) PAL/NTSC 39 Figure 16 Grey-scale non-purity (white tracking error) SECAM 40 Figure 17 Colour reproduction 47 Figure 18 Luminance and chrominance moirs PAL/NTSC 50 Figure 19 Luminance and chrominance moirs SECAM 51 Figure 20 Luminance moirs 52 Fi
29、gure 21 Chrominance moirs 53 Figure 22 Lag 55 Figure 23 Timing chart for measuring lags 57 Figure 24 Sticking 60 Figure 25 Blooming and smearing 61 Figure 26 Blooming 62 Figure 27 Horizontal smearing 64 Figure 28 Vertical smearing 65 Figure 29 Geometric distortions 67 Figure A.1 Test chart No. 1 70
30、Page Figure A.2 Test chart No. 3 Radial resolution 71 Figure A.3 Test chart No. 4 72 Figure A.4 Test chart No. 5 73 Figure A.5 Test chart No. 6 74 Figure A.6 Test chart No. 7 75 Figure A.7 Test chart No. 9 76 Figure A.8 Test chart No. 12 77 Figure A.9 Test chart No. 13 78 Figure A.10 Test chart No.
31、16 79 Figure B.1 Arrangement of the CIE colour chips to be used for the measurement of colour reproduction on test chart No. 8 The background is black with reflectance less than 2 % 80 Figure C.1 Trap filter characteristics for PAL 83 Figure C.2 Trap filter characteristics for NTSC 84 Figure C.3 Tra
32、p filter characteristics for SECAM 85 Table B.1 Colorimetric parameters of typical colour chips (NTSC system) 81 Table B.2 Colorimetric parameters of typical colour chips (PAL SECAM systems) 82blankEN61146-1:1996 BSI 01-1999 5 Section 1. General 1 Scope This part of IEC1146 is applicable to the asse
33、ssment of performance of non-broadcast colour video cameras equipped with a single-tube or solid-state imager. This part of IEC1146 defines test patterns and measurement conditions, so as to make possible the comparison of the results of measurements. The methods of measurement are designed to make
34、possible the assessment of the performance of the camera by using the lens input and any electrical output terminals of the device (e.g. Y/C and composite). This part of IEC1146 does not specify limiting values for various characteristics. 2 Normative references The following normative documents con
35、tain provisions which, through reference in this text, constitute provisions of this part of IEC1146. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC1146 are encouraged to investigate
36、the possibility of applying the most recent editions of the normative documents listed below. Members ofIEC andISO maintain registers of currently valid International Standards. IEC883:1987, Measuring method for chrominance signal-to-random noise ratio for video tape recorders. CCIR Recommendation 5
37、67-3, Transmission performance of television circuits designed for use in international connections (1978-1982-1986-1990). CCIR Report 624-4:1974-1978-1982-1986-1990, Characteristics of television systems. CIE 15:1971, Colorimetry: Official Recommendation of the International Commission on Illuminan
38、ts. Supplement 2:1987, Recommendation on uniform colour space. Colour difference equation psychometric colour terms. CIE 13-2:1988, Method of measuring and specifying colour rendering of light sources. CIE 01:1986, Colorimetric illuminants. CIE 02:1986, Colorimetric observers. IEC 27, Letter symbols
39、 to be used in electrical technology. IEC 50(845):1987, International Electrotechnical Vocabulary (IEV) Chapter 845: Lighting. 3 Conditions 3.1 Environmental conditions All measurements shall be carried out within the environmental conditions as specified by the manufacturer. The environmental condi
40、tions during measurement, at least the temperature and the relative humidity, shall be reported together with the presentation of the results of measurements. An adequate warm-up time shall be allowed. 3.2 Conditions of measurements Except when otherwise indicated, the measurements shall be carried
41、out by measuring the output signal of the camera when it is shooting different test charts, depending on the characteristic to be measured. Each test pattern shall be specified, together with the lighting conditions (illumination intensity, correlated colour temperature of the light source, etc.). T
42、he use of transparent test charts instead of the reflection types may be allowed; however, the reflection types should be used in questionable cases. Unless otherwise stated, all measurements shall be made in automatic mode.EN61146-1:1996 6 BSI 01-1999 3.3 Conditions of shooting Unless otherwise sta
43、ted, the conditions of shooting shall be as follows. The subject illumination of a reflective test chart shall be 2000 lx 5% (see note). The luminance of a transparent test chart, at peak white, shall be 636cd/m 2 5%. The non-uniformity of the subject illumination shall be less than 5%. The correlat
44、ed colour temperature of the light source shall be 3100K 100K. The white balance shall be set manually or automatically to 3100K 100K. The test chart shall be shot by the camera so that the frame limited by the arrows coincides exactly with the edges of the picture displayed on the video monitor in
45、underscan mode. The focus control shall be in auto or manual mode, and shall be in optimum focus. The iris control shall be in auto or manual mode. In order to obtain the desired exposure level, it may be advantageous to add an illuminated white card or a black area, and also to adjust the lens zoom
46、 so that the measurement does not depend on exactly filling the screen to the arrows of the test chart. The gain control, if any, shall be set to “0 dB” gain. The optical filter, if any, shall be set to “open position”. NOTEMeasured by a luxmeter at the centre of the test chart, the receptor pointin
47、g in the direction of the camera. 3.4 Reference conditions Unless otherwise specified, the reference luminance output signal level is assumed to be 700mV peak-to-peak (p.-p.) for PAL and SECAM systems and 714mV peak-to-peak for NTSC systems (from the blanking level to the peak white level). NOTEIn t
48、he following clauses, it is also assumed, for the purpose of giving examples of output voltage obtained undercertain conditions, that the rated output voltage is also700mV p.-p. or 714mV p.-p. Section 2. Luminance video characteristics 4 Luminance sensitivity 4.1 Characteristic to be specified The m
49、inimum subject illumination for which the video camera produces a luminance output level of one-half the rated level. 4.2 Method of measurement a) The equipment arrangement and the grey-scale test chart shall be as shown inFigure 1. b) The conditions of shooting shall be those mentioned in3.3. c) Either the screen size or the zoom condition may be changed, or a black or white subject may be added, to give the
