1、INTERNATIONAL STANDARD IEC 62122 First edition 2002-03 Methods of measurement for consumer-use digital VTRs Electronic and mechanical performances Mthodes de mesure pour les magntoscopes numriques destins au grand public Performances lectroniques et mcaniques Reference number IEC 62122:2002(E)Public
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8、9 02 11 Fax: +41 22 919 03 00INTERNATIONAL STANDARD IEC 62122 First edition 2002-03 Methods of measurement for consumer-use digital VTRs Electronic and mechanical performances Mthodes de mesure pour les magntoscopes numriques destins au grand public Performances lectroniques et mcaniques IEC 2002 Co
9、pyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 1
10、31, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch T For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 62122 IEC:2002(E) CONTENTS FOREWORD.7 1 S
11、cope and object8 2 Normative references8 3 Terms and definitions .9 4 Measuring conditions 10 4.1 General .10 4.2 Environmental conditions.10 4.3 Power supply.10 4.4 Test signal.10 4.4.1 Video test signal 10 4.4.2 Colour bar signal .11 4.4.3 Video input signal for measuring audio characteristics11 4
12、.5 Measuring instruments.11 4.5.1 Noise meter.11 4.5.2 Audio signal generator .11 4.5.3 Audio level meter.11 4.5.4 Audio mixed frequency oscillator12 4.5.5 Audio harmonic distortion meter.12 4.6 Video test tape 12 5 Methods of measurement for mechanical characteristics.12 5.1 General .12 5.2 Tape sp
13、eed .12 5.2.1 Test signal.12 5.2.2 Measurement.12 5.2.3 Presentation of the results .13 5.3 Flatness of the RF envelope 13 5.3.1 Test signal.13 5.3.2 Block diagram13 5.3.3 Measurement.13 5.3.4 Presentation of the result .14 5.4 Linearity 14 5.4.1 Test signal.14 5.4.2 Measurement.14 5.4.3 Presentatio
14、n of the results .15 5.5 Effective area starting position.15 5.5.1 Test signal.15 5.5.2 Measurement.15 5.5.3 Presentation of the results .15 5.6 Track displacement measurement by image processing .15 5.6.1 Measurement system.15 5.6.2 Image processing technique.15 5.6.3 Measuring results 1662122 IEC:
15、2002(E) 3 6 Video characteristics (analogue input/output) 17 6.1 General .17 6.2 Luminance amplitude frequency response17 6.2.1 Test signal.17 6.2.2 Block diagram17 6.2.3 Measurement.17 6.2.4 Presentation of results .18 6.3 Chrominance amplitude frequency response 18 6.3.1 Test signal.18 6.3.2 Block
16、 diagram18 6.3.3 Measurement.18 6.3.4 Presentation of results .18 6.4 Luminance diagonal resolution.19 6.5 Luminance frequency characteristics of diagonal resolution (i) .19 6.6 Luminance frequency characteristics of diagonal resolution (ii).19 6.7 Luminance non-linear distortion .19 6.8 Luminance w
17、aveform distortion (linear distortion).19 6.9 Chrominance waveform distortion 19 6.9.1 Test signal.19 6.9.2 Block diagram19 6.9.3 Measurement.19 6.9.4 Presentation of results .20 6.10 Luminance vertical waveform distortion20 6.11 Chrominance vertical waveform distortion 20 6.12 Automatic Gain Contro
18、l (AGC) operation20 6.13 Chrominance to luminance horizontal displacement .20 6.14 Chrominance to luminance vertical displacement .20 6.15 Luminance signal-to-noise ratio .20 6.15.1 General .20 6.15.2 Test signal.21 6.15.3 Block diagram21 6.15.4 Measurement.21 6.15.5 Presentation of the results .22
19、6.16 Chrominance signal-to-noise ratio22 6.16.1 General .22 6.16.2 Test signal.22 6.16.3 Block diagram22 6.16.4 Measurement.23 6.16.5 Presentation of the results .23 7 Composite signal decoding characteristics (luminance and chrominance separation).24 7.1 Luminance signal separation (general).24 7.2
20、 Luminance signal separation at colour change points.24 7.3 Chrominance signal separation24 7.4 Chrominance signal separation with three dimensional processing .24 7.4.1 Test signal.24 7.4.2 Block diagram24 7.4.3 Measurement.24 7.4.4 Presentation of results .25 4 62122 IEC:2002(E) 7.5 Luminance sign
21、al separation with three dimensional signal processing.25 7.5.1 Test signal.25 7.5.2 Block diagram25 7.5.3 Measurement.25 7.5.4 Presentation of results .25 8 Audio characteristics (analogue input/output) 25 8.1 General .25 8.2 Audio operational output voltage (with AGC) 26 8.2.1 Test signal.26 8.2.2
22、 Block diagram26 8.2.3 Measurement.26 8.2.4 Presentation of results .26 8.3 Audio operational input voltage (without AGC)26 8.3.1 Test signal.26 8.3.2 Block diagram26 8.3.3 Measurement.26 8.3.4 Presentation of results .26 8.4 Audio maximum output voltage 26 8.4.1 Test signal.26 8.4.2 Block diagram27
23、 8.4.3 Measurement.27 8.4.4 Presentation of results .27 8.5 Amplitude frequency response.27 8.5.1 Test signal.27 8.5.2 Measurement.27 8.6 Phase difference between channels.27 8.6.1 Test signal.27 8.6.2 Measurement.27 8.6.3 Presentation of results .27 8.7 Signal-to-noise ratio.27 8.8 Dynamic range 27
24、 8.8.1 Test signal.27 8.8.2 Measurement.28 8.8.3 Presentation of results .28 8.9 Harmonic distortion28 8.10 Inter-modulation distortion .28 8.10.1 Test signal.28 8.10.2 Measurement.28 8.10.3 Presentation of result.28 8.11 Channel separation28 8.11.1 Test signals .28 8.11.2 Measurement.28 8.11.3 Pres
25、entation of results .28 8.12 Wow-flutter29 8.13 Pitch difference between record and playback29 8.13.1 Test signal.29 8.13.2 Measurement.29 8.13.3 Presentation of results .29 9 Classification of the characteristics to be specified2962122 IEC:2002(E) 5 Annex A (informative) Error rate.44 A.1 Definitio
26、n .44 A.2 Block diagram44 A.3 Measurement.44 A.4 Presentation of the results45 A.5 Example 145 A.6 Example 245 Bibliography47 Figure 1 Basic block diagram of measurement system30 Figure 2 Measuring method for track interval 30 Figure 3 Measuring block diagram for RF envelope flatness31 Figure 4 Meas
27、uring method for RF envelope flatness31 Figure 5 Cross-tape track height for DV format.31 Figure 6 Cross-tape track height for D-VHS format .32 Figure 7 Measuring method for linearity32 Figure 8 Measuring method for the starting position32 Figure 9 Block diagram of the measurement system .33 Figure
28、10 Schematic diagram of the image processing technique34 Figure 11 Illustration of track displacement distribution (model) 35 Figure 12 Example of calculation results.35 Figure 13 Test signal for luminance amplitude frequency response.36 Figure 14 Measuring block diagram for composite video signal .
29、36 Figure 15 Measuring block diagram for S video signal.36 Figure 16 Test signal for chrominance amplitude frequency response.37 Figure 17 Test signal for luminance non-linear distortion.37 Figure 18 Test signal for luminance waveform distortion .37 Figure 19 Test signal for chrominance waveform dis
30、tortion .38 Figure 20 Measuring method for chrominance waveform distortion .38 Figure 21 Composite video test signal for luminance signal-to-noise ratio .39 Figure 22 S luminance test signal for luminance signal-to-noise ratio39 Figure 23 S chrominance test signal for luminance signal-to-noise ratio
31、39 Figure 24 Block diagram for composite video input .39 Figure 25 Block diagram for S video input.40 Figure 26 Composite video test signal for chrominance signal-to-noise ratio .40 Figure 27 S luminance test signal for chrominance signal-to-noise ratio40 Figure 28 S chrominance test signal for chro
32、minance signal-to-noise ratio41 Figure 29 Test signal for 3D chrominance signal separation41 Figure 30 Measuring block diagram for chrominance signal separation .41 Figure 31 Measuring method for 3D chrominance signal separation42 Figure 32 Test signal for 3D luminance signal separation42 Figure 33
33、Measuring block diagram for luminance signal separation .42 6 62122 IEC:2002(E) Figure 34 Measuring method for 3D luminance signal separation43 Figure 35 Block diagram for audio characteristics.43 Figure A 1 Structure of Data-synchronisation blocks .46 Figure A 2 Structure of DV format data-synchron
34、isation blocks .46 Figure A 3 Structure of D-VHS format data-synchronisation blocks .46 Table 1 Setting of the colour noise meter for luminance measurement .21 Table 2 Example: white level of test signal (8 bit system) .22 Table 3 Setting of the colour noise meter for chrominance measurement .23 Tab
35、le 4 Example: Chrominance level of test signal (8 bit system) .23 Table 5 Classification of the characteristics to be specified 2962122 IEC:2002(E) 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METHODS OF MEASUREMENT FOR CONSUMER-USE DIGITAL VTRs ELECTRONIC AND MECHANICAL PERFORMANCES FOREWORD 1) Th
36、e IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrica
37、l and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, govern
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40、ernational use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards tr
41、ansparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be r
42、endered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such p
43、atent rights. International Standard IEC 62122 has been prepared by TA 7: Moderate data rate storage media and equipment, of IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on the following documents: FDIS Report on voting 100/452/FD
44、IS 100/480/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Annex A is for information only. The committee has decided that the
45、contents of this publication will remain unchanged until 2007. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. 8 62122 IEC:2002(E) METHODS OF MEASUREMENT FOR CONSUMER-USE DIGITAL VTRs ELECTRONIC AND MECHANICAL PERFORMANCES 1 Scope and object T
46、his standard specifies the basic methods of measurement for evaluating the electronic and mechanical performances of consumer-use digital VTRs. The formats of open reel VTRs, Beta, VHS, and 8 mm VTRs have been standardized. Methods of measurement for these analogue VTRs have been standardized in IEC
47、 61041-1, IEC 61041-2, IEC 61041-3, IEC 61041-4, IEC 61041-5, and IEC 61146-3. Digital VTR 6,35 mm DV format and 12,65 mm D-VHS format have now been brought on the market. The methods of measurement for these consumer-use digital VTRs should be specified and standardized. With these measurement tech
48、niques, some items for the evaluation of performances specific to digital VTRs have also been included. There are two objectives for the proposed methods of measurement. One is to check the interchangeability and characteristics of the equipment under test which are indispensable to manufacturers, a
49、nd the other is to evaluate the quality of image and sound, which concerns the customer. The latter is a priority for consumer satisfaction. Since a consumer can use only general-purpose instruments, any test which needs dismantling of apparatus and requires special instruments is in principle not specified. As error rate is important for digital equipment, an example
