1、BRITISH STANDARD BS EN 62122: 2002 Methods of measurement for consumer-use digital VTRs Electronic and mechanical performances The European Standard EN 62122:2002 has the status of a British Standard ICS 33.160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 62122:2002
2、 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 11 July 2002 BSI 11 July 2002 ISBN 0 580 39986 9 National foreword This British Standard
3、is the official English language version of EN 62122:2002. It is identical with IEC 62122:2002. The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems, to Subcommittee EPL/100/2, Recording, which has the responsibility to: A list of
4、organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all 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 numberi
5、ng system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Corresponde
6、nce Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of its
7、elf confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate the
8、m in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 49, and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUR
9、OPEAN STANDARD EN 62122 NORME EUROPENNE EUROPISCHE NORM June 2002 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 2002 CENELEC -
10、 All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62122:2002 E ICS 33.160.40 English version Methods of measurement for consumer-use digital VTRs - Electronic and mechanical performances (IEC 62122:2002) Mthodes de mesure pour les magntoscop
11、es numriques destins au grand public - Performances lectroniques et mcaniques (CEI 62122:2002) Messverfahren fr digitale Videobandgerte fr den Heimgebrauch - Elektrische und mechanische Leistungsfhigkeit (IEC 62122:2002) This European Standard was approved by CENELEC on 2002-05-01. CENELEC members a
12、re 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 standards may be obtained on application to
13、 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 Secretariat has th
14、e same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdo
15、m.EN 62122:2200 - - 2 Foreword The text of document 100/452/FDIS, future edition 1 of IEC 62122, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62122 on 2002-05-01. The following dates were f
16、ixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-05-01 Annexes designated “normative“ are p
17、art 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. _ Endorsement notice The text of the International Standard IEC 62122:2002 was approved by CENELEC
18、 as a European Standard without any modification. _ Page2 EN62122:2002 11July200222126 (2002:CEI)E 3 CONTENTS 1 Scope and object .8 2 Normative references.8 3 Terms and definitions.9 4 Measuring conditions .10 4.1General .10 4.2Environmental conditions .10 4.3Power supply.10 4.4Test signal.11 4.4.1
19、Video test signal 11 4.4.2 Colour bar signal .11 4.4.3 Video input signal for measuring audio characteristics11 4.5Measuring instruments.11 4.5.1 Noise meter.11 4.5.2 Audio signal generator .11 4.5.3 Audio level meter.12 4.5.4 Audio mixed frequency oscillator12 4.5.5 Audio harmonic distortion meter.
20、12 4.6Video test tape 12 5 Methods of measurement for mechanical characteristics 12 5.1General .12 5.2Tape speed .12 5.2.1 Test signal.12 5.2.2 Measurement.13 5.2.3 Presentation of the results .13 5.3Flatness of the RF envelope 13 5.3.1 Test signal.13 5.3.2 Block diagram13 5.3.3 Measurement.14 5.3.4
21、 Presentation of the result .14 5.4Linearity 14 5.4.1 Test signal.14 5.4.2 Measurement.14 5.4.3 Presentation of the results .15 5.5Effective area starting position.15 5.5.1 Test signal.15 5.5.2 Measurement.15 5.5.3 Presentation of the results .15 5.6Track displacement measurement by image processing
22、 .15 5.6.1 Measurement system.15 5.6.2 Image processing technique.16 5.6.3 Measuring results 16 Page3 EN62122:2002 11July2002 4 22126 (2002:CEI)E 6 Video characteristics (analogue input/output) .17 6.1General .17 6.2Luminance amplitude frequency response17 6.2.1 Test signal.17 6.2.2 Block diagram17
23、6.2.3 Measurement.18 6.2.4 Presentation of results .18 6.3Chrominance amplitude frequency response 18 6.3.1 Test signal.18 6.3.2 Block diagram18 6.3.3 Measurement.18 6.3.4 Presentation of results .19 6.4Luminance diagonal resolution.19 6.5Luminance frequency characteristics of diagonal resolution (i
24、)19 6.6Luminance frequency characteristics of diagonal resolution (ii).19 6.7Luminance non-linear distortion .19 6.8Luminance waveform distortion (linear distortion).19 6.9Chrominance waveform distortion 19 6.9.1 Test signal.19 6.9.2 Block diagram20 6.9.3 Measurement.20 6.9.4 Presentation of results
25、 .20 6.10 Luminance vertical waveform distortion20 6.11 Chrominance vertical waveform distortion 20 6.12 Automatic Gain Control (AGC) operation20 6.13 Chrominance to luminance horizontal displacement .20 6.14 Chrominance to luminance vertical displacement .21 6.15 Luminance signal-to-noise ratio .21
26、 6.15.1 General .21 6.15.2 Test signal.21 6.15.3 Block diagram21 6.15.4 Measurement.21 6.15.5 Presentation of the results .22 6.16 Chrominance signal-to-noise ratio23 6.16.1 General .23 6.16.2 Test signal.23 6.16.3 Block diagram23 6.16.4 Measurement.23 6.16.5 Presentation of the results .24 7 Compos
27、ite signal decoding characteristics (luminance and chrominance separation) 24 7.1Luminance signal separation (general).24 7.2Luminance signal separation at colour change points .24 7.3Chrominance signal separation 25 7.4Chrominance signal separation with three dimensional processing .25 7.4.1 Test s
28、ignal.25 7.4.2 Block diagram25 7.4.3 Measurement.25 7.4.4 Presentation of results .25 Page4 EN62122:2002 11July200222126 (2002:CEI)E 5 7.5Luminance signal separation with three dimensional signal processing.25 7.5.1 Test signal.25 7.5.2 Block diagram26 7.5.3 Measurement.26 7.5.4 Presentation of resu
29、lts .26 8 Audio characteristics (analogue input/output) .26 8.1General .26 8.2Audio operational output voltage (with AGC) 26 8.2.1 Test signal.26 8.2.2 Block diagram26 8.2.3 Measurement.26 8.2.4 Presentation of results .26 8.3Audio operational input voltage (without AGC)27 8.3.1 Test signal.27 8.3.2
30、 Block diagram27 8.3.3 Measurement.27 8.3.4 Presentation of results .27 8.4Audio maximum output voltage 27 8.4.1 Test signal.27 8.4.2 Block diagram27 8.4.3 Measurement.27 8.4.4 Presentation of results .27 8.5Amplitude frequency response .27 8.5.1 Test signal.27 8.5.2 Measurement.27 8.6Phase differen
31、ce between channels .28 8.6.1 Test signal.28 8.6.2 Measurement.28 8.6.3 Presentation of results .28 8.7Signal-to-noise ratio.28 8.8Dynamic range.28 8.8.1 Test signal.28 8.8.2 Measurement.28 8.8.3 Presentation of results .28 8.9Harmonic distortion28 8.10 Inter-modulation distortion .28 8.10.1 Test si
32、gnal.28 8.10.2 Measurement.29 8.10.3 Presentation of result.29 8.11 Channel separation29 8.11.1 Test signals .29 8.11.2 Measurement.29 8.11.3 Presentation of results .29 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 Presenta
33、tion of results .29 9 Classification of the characteristics to be specified .29 Page5 EN62122:2002 11July2002 6 22126 (2002:CEI)E Annex A (informative) Error rate.44 A.1 Definition .44 A.2 Block diagram44 A.3 Measurement.44 A.4 Presentation of the results45 A.5 Example 145 A.6 Example 245 Annex ZA (
34、normative) Normative reference to international publications with their corresponding European publications .48 Bibliography47 Figure 1 Basic block diagram of measurement system31 Figure 2 Measuring method for track interval 31 Figure 3 Measuring block diagram for RF envelope flatness31 Figure 4 Mea
35、suring method for RF envelope flatness32 Figure 5 Cross-tape track height for DV format.32 Figure 6 Cross-tape track height for D-VHS format .32 Figure 7 Measuring method for linearity32 Figure 8 Measuring method for the starting position33 Figure 9 Block diagram of the measurement system .33 Figure
36、 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
37、.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 di
38、stortion .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 rati
39、o39 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 chr
40、ominance 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 Page6 EN62122:2002 11July200222126 (2002:CEI)E 7 Figure 32 Test sign
41、al for 3D luminance signal separation42 Figure 33 Measuring block diagram for luminance signal separation .42 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 Struct
42、ure of DV format data-synchronisation 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 .22 Table 2 Example: white level of test signal (8 bit system) .22 Table 3 Setting of the colour noise meter for c
43、hrominance measurement .23 Table 4 Example: Chrominance level of test signal (8 bit system) .24 Table 5 Classification of the characteristics to be specified 30 Page7 EN62122:2002 11July2002 8 22126 (2002:CEI)E METHODS OF MEASUREMENT FOR CONSUMER-USE DIGITAL VTRs ELECTRONIC AND MECHANICAL PERFORMANC
44、ES 1 Scope and object This 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 b
45、een standardized in IEC 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
46、 these measurement techniques, 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 indispensa
47、ble to manufacturers, and 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 instrument
48、s is in principle not specified. As error rate is important for digital equipment, an example of a method for measuring error rate is given in annex A. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edi
49、tion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60094-3:1979, Magnetic tape sound recording and reproducing systems Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape IEC 60386:1972, Method of measurement of speed fluctuations in sound recording
