1、Methods of measurement for consumer-use digital VTFb Electronic and mechanical per for mances The European Standard EN 62122:2002 has the status of a British Standard ICs 33.160.40 BS EN 62122: 2002 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 62122:2002 Amd. No. Nati
2、onal foreword Date Comments 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 July2002 This British Standard is the official English lang
3、uage version of EN 62122:2002. It is identical with IEC 62122:2002. The UKparticipation 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: - - aid enquirers to understand the tex
4、t; 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 them in the UK. - A list of organizations represented on this subcommittee can be
5、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 fi-om one numbering system to the other, publications may contain iden
6、tifiers from both systems. Cros s-r e fer en ces 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 Correspondence Index”, or by using the “Search”faci1ity of
7、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 itself confer immunity from legal obligations. Summa
8、ry 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. OBSI 11 July 2002 ISBN O 580 39986 9 EUROPEAN STANDARD EN 62122 NORME EUROPENNE
9、 EUROPISCHE NORM June 2002 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 magntoscopes numriques destins au grand public - Performances lectroniques Leistungsfhigkeit et mcaniques
10、 (IEC 62122:2002) (CE1 62122:2002) Messvetfahren fr digitale Videobandgerte fr den Heimgebrauch - Elektrische und mechanische This European Standard was approved by CENELEC on 2002-05-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for
11、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 Secretariat or to any CENELEC member. This European Standard exists in three offici
12、al 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 the oficial versions. CENELEC members are the national electrotechnical committ
13、ees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation
14、 Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62122:2002 E Page 2 EN 62122:2002 Foreword The te
15、xt 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 fixed: - latest date by which the EN h
16、as to be implemented at national level by publication of an identical national standard or by endorsement (dOP) - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are part of the body of the standard. Annexes designated “informat
17、ive“ are given for information only. In this standard, annex ZA is normative and annex A is informative. Annex ZA has been added by CENELEC. 2003-02-01 2005-05-01 Endorsement notice The text of the International Standard IEC 62122:2002 was approved by CENELEC as a European Standard without any modif
18、ication. O 11 July 2002 Page 3 EN 62122:2002 CONTENTS 1 Scope and object 2 Normative references . 8 3 Terms and definitions 4 Measuring conditions 4.1 General . 10 . IO 4.3Power supply . IO 4.4Test signal . II . II . II measuring audio characteristics 11 4.5Measuring instruments . II 4.5.1 Noise met
19、er . II r . II 4.5.3 Audio level meter . 12 4.5.4 Audio mixed frequency oscillator 12 4.5.5 Audio harmonic distortion meter . 12 4.6Video test tape . 12 5 Methods of meas hanical characteristics . .I2 5.1 General . 12 5.2Tape speed . 12 5.2.1 Test signa . 12 5.2.2 Measurem . 13 5.2.3 Presentation of
20、 the results . 13 . 13 5.3Flatness of the RF en 5.3.1 Test signal . 13 5.3.2 Block diagra . 13 5.3.3 Measurement . 14 5.3.4 Presentation of the result . 14 5.4Linearity . . 14 5.4.1 Test signal . 14 5.4.2 Measurement . 14 sults . 15 5.5 Effective area starting position . 15 5.5.1 Test signal . 15 5.
21、5.2 Measurement . 15 5.5.3 Presentation of the results . 15 5.6Track displacement measurement by image processing . 15 5.6.2 Image processing technique . 16 5.6.3 Measuring results . 16 5.6.1 Measurement system . 15 O 11 July 2002 Page 4 EN 62122:2002 6 Video characteristics (analogue inputloutput)
22、17 17 17 17 17 18 18 18 18 18 18 19 19 19 19 19 19 19 20 20 6.1 General . 6.2Luminance amplitude frequency response . 6.2.1 Test signal . 6.2.2 Block diagram 6.2.3 Measurement . 6.2.4 Presentation of resu 6.3Chrominance amplitude frequency response . 6.3.1 Test signal . 6.3.2 Block diagram 6.3.3 Mea
23、surement . 6.3.4 Presentation of 19 6.4Luminance diagonal resolution 6.5Luminance frequency characteristics of diagonal resolution (i) . 6.6Luminance frequency characteristics of diagonal resolution (i) 6.7 Luminance non-linear distortion 6.8Luminance waveform distortion (linear distortion) 6.9Chrom
24、inance waveform distortion . 6.9.1 Test signal . 6.9.2 Block diagram 6.9.3 Measurement . 6.9.4 Presentation of 20 6.10 Luminance vertical wav ortion . 20 6.1 1 Chrominance vertical waveform distortion . 6.12 Automatic Gain Control (AGC) operation . 6.1 3 Chrominance to luminance horizontal displacem
25、ent 6.14 Chrominance to luminance vertical displacement 6.15.1 General . 6.15.2 Test signal . 6.15.3 Block diagram 6.15.4 Measurement . 6.15.5 Presentation of the results 22 6.1 6 Chrominance signal-to-noise ratio . 23 6.16.1 General . 6.16.2 Test signal . 6.16.3 Block diagram 6.16.4 Measurement . 6
26、.16.5 Presentation of 24 Composite signal decoding characteristics (luminance and chrominance separation) 24 20 20 20 21 21 21 21 21 6.1 5 Luminance signal-to-noise ratio 21 23 23 23 23 7 7.1 Luminance signal separation (general) .24 7.2Luminance signal separation at colour points . .24 7.3Chrominan
27、ce signal separation . .25 7.4 Chrominance signal separation with three dimensional processing . .25 .25 .25 . .25 7.4.1 Test signal .25 . 7.4.2 Block diagram 7.4.3 Measurement . 7.4.4 Presentation of results . O 11 July 2002 Page 5 EN 62122:2002 7.5Luminance signal separation with three dimensional
28、 signal processing 7.5.1 Test signal . . 7.5.2 Block diagram . 7.5.3 Measurement . . 7.5.4 Presentation of results . . Audio characteristics (analogue inputloutput) 8.2Audio operational output voltage (with AGC) 8 . . 8.2.1 Test signal . 8.2.2 Block diagram 8.2.3 Measurement . . 8.2.4 Presentation o
29、f results . . 8.3Audio operational input voltage (without AGC) . 8.3.1 Test signal . . 8.3.2 Block diagram . 8.3.3 Measurement . . 8.3.4 Presentation of results . . 8.4.1 Test signal . . 8.4.2 Block diagram . 8.4.3 Measurement . . 8.4.4 Presentation of results . . 8.5Amplitude frequency response . .
30、 8.5.1 Test signal . . 8.5.2 Measurement . . 8.6.1 Test signal . 8.6.2 Measurement . . 8.6.3 Presentation of results . . 8.7Signal-to-noise ratio . . 8.8Dynamic range . . 8.8.1 Test signal . 8.8.2 Measurement . 8.8.3 Presentation of results . . 8.9Harmonic distortion . 8.1 O Inter-modulation distort
31、ion . . 8.1 0.1 Test signal . . 8.1 0.2 Measurement . . 8.1 0.3 Presentation of result . . 8.1 1 Channel separation . 8.1 1 .I Test signals . . 8.1 1.2 Measurement . . 8.1 1.3 Presentation of results . . 8.12 Wow-flutter . 8.1 3 Pitch difference between record and playback . 8.1 3.1 Test signal . .
32、8.1 3.2 Measurement . . 8.1 3.3 Presentation of results . . Classification of the characteristics to be specified 8.4Audio maximum output voltage . 8.6Phase difference between channels . . 9 O 11 July 2002 Page 6 EN 62122:2002 Annex A (informative) Error rate . . .44 A.l Definition . . .44 A.2 Block
33、 diagram . .44 A.3 Measurement 44 A.4 Presentation of the results 45 A.5 Example 1 45 A.6 Example 2 45 Annex ZA (normative) Normative reference to international publications with their corresponding European publications 48 Bibliography . .47 Figure 1 - Basic block diagram of measurement system Figu
34、re 2 - Measuring method for track interval Figure 3 - Measuring block diagram for RF envelope flatness 31 31 31 Figure 4 - Measuring method for RF envelope flatness 32 Figure 5 - Cross-tape track height for DV format . 32 Figure 6 - Cross-tape track height for D-VHS format . 32 32 33 33 34 35 35 Fig
35、ure 13 - Test signal for luminance amplitude frequency response . 36 Figure 14 - Measuring block diagram for composite video signal . 36 Figure 15 - Measuring block diagram for S video signal . 36 Figure 16 - Test signal for chrominance amplitude frequency response . 37 37 37 38 Figure 20 - Measurin
36、g method for chrominance waveform distortion . 38 39 Figure 22 - S luminance test signal for luminance signal-to-noise ratio 39 Figure 7 - Measuring method for linearity Figure 8 - Measuring method for the starting position Figure 9 - Block diagram of the measurement system Figure 10 - Schematic dia
37、gram of the image processing techniqu Figure 11 - Illustration of track displacement distribution (model) Figure 12 - Example of calculation results . Figure 17 - Test signal for luminance non-linear distortion Figure 18 -Test signal for luminance waveform distortion . Figure 19 -Test signal for chr
38、ominance waveform distortion . Figure 21 - Composite video test signal for luminance signal-to-noise ratio . Figure 23 - S chrominance test signal for luminance signal-to-noise ratio 39 Figure 24 - Block diagram for composite video input Figure 25 - Block diagram for S video input . Figure 26 - Comp
39、osite video test signal for chrominance signal-to-noise ratio . 40 Figure 27 - S luminance test signal for chrominance signal-to-noise ratio 39 40 40 41 41 Figure 28 - S chrominance test signal for chrominance signal-to-noise ratio Figure 29 - Test signal for 3D chrominance signal separation Figure
40、30 - Measuring block diagram for chrominance signal separation .41 Figure 31 - Measuring method for 3D chrominance signal separation 42 O 11 July 2002 Page 7 EN 62122:2002 Figure 32 . Test signal for 3D luminance signal separation 42 Figure 33 . Measuring block diagram for luminance signal separatio
41、n . 42 Figure 34 . Measuring method for 3D luminance signal separation 43 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-synchronisation blocks . 46 Figure A 3 . Structure of D-VHS format da
42、ta-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 chrominance measurement . 23 Table 4- Example: Chrominance level of test signal (8
43、 bit system) . 24 Table 5 . Classification of the characteristics to be specified 30 O 11 July 2002 Page 8 EN 62122:2002 METHODS OF MEASUREMENT FOR CONSUMER-USE DIGITAL VTRS - ELECTRONIC AND MECHANICAL PERFORMANCES 1 Scope and object This standard specifies the basic methods of measurement for evalu
44、ating 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 61041-1, IEC 61041-2, IEC 61041-3, IEC 61041-4, IEC 61041-5, and
45、 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 techniques, some items for the evaluation of performances specific to
46、 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, and the other is to evaluate the quality of image and sound, which
47、 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 ex
48、ample 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 edition cited applies. For undated references, the latest edition of the referenced documen
49、t (including any amendments) applies. IEC 60094-3:1979, Magnefic fape sound recording and reproducing sysfems - Parf 3: Mefhods of measuring fhe characferisfics of recording and reproducing equipmenf for sound on magnefic fape IEC 60386:1972, Mefhod of measuremenf of speed flucfuafions in sound recording and reproducing equipmenf IEC 60883: 1987, Measuring mefhod for chrominance signal-fo-random noise rafio for video fape recorders IEC 61041-1:1990, Non-broadcasf video fape recorders - Mefhods of measuremenf - Parf 1: General, video (NTSCIPAL) and audio (longifudin
