1、BRITISH STANDARD BS EN 61041-5:1998 BS 7434-5: 1998 IEC 61041-5: 1997 Methods of measurement Non-broadcast video tape recorders Part 5: High-band video tape recorders, including those equipped with Y/C video connectors (NTSC/PAL) The European Standard EN 61041-5:1997 has the status of a British Stan
2、dard ICS 33.160.40BSEN 61041-5:1998 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15 April 1998 BSI 03-1999 ISBN 0 580 28436 0 Amendments issued since publication Am
3、d. No. Date CommentsBSEN61041-5:1998 BSI 03-1999 i Contents Page National foreword ii Foreword 2 Text of EN61041-5 5BSEN61041-5:1998 ii BSI 03-1999 National foreword This British Standard is the English language version of EN 61041-5:1997. It is identical with IEC61041-5:1997. The UK participation i
4、n 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/European committee any enquiries on
5、 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 committee can be obtained on request to its secretary. For ease of reference to other p
6、arts of BS7434, this standard has also been designated as BS7434-5. IEC61041 consists of the following parts: Part 1: General video (NTSC/PAL) and audio (longitudinal) characteristics; Part 2: Video characteristics chrominance SECAM; Part 3: Audio characteristics for FM recording; Part 4: Calibratio
7、n tape (NTSC/PAL/SECAM); Part 5: High-band video tape recorders, including those equipped with Y/C video connectors (NTSC/PAL). Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with
8、 their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility
9、 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. Compliance with a British Standard does not of itself confer immunity from legal obligation
10、s. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 30, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendm
11、ent table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61041-5 August 1997 ICS 33.160.40 Descriptors: Recording apparatus, video recording, sound recording, magnetoscopes, measurements, characteristics, chrominance, luminance, video signals English version Non-broad
12、cast video tape recorders Methods of measurement Part 5: High-band video tape recorders, including those equipped with Y/C video connectors (NTSC/PAL) (IEC 61041-5:1997) Magntoscopes hors radiodiffusion Mthodes de mesure Partie 5: Magntoscopes en bande largie, y compris ceux quips de connecteurs Y/C
13、 (NTSC/PAL) (CEI 61041-5:1997) Videobandgerte fr den Gebrauch auerhalb des Rundfunks Meverfahren Teil 5: Hi-Band-Videobandgerte, einschlielich solcher, die mit Y/C-Video-Steckverbindungen ausgerstet sind (NTSC/PAL) (IEC 61041-5:1997) This European Standard was approved by CENELEC on 1997-07-01. CENE
14、LEC 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 standards may be obtained on a
15、pplication to the Central Secretariat or to any CENLEC 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 Secret
16、ariat has the same status as the official versions. CENELEC members are the national electrotechincal committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC
17、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 means reserved worldwide fo
18、r CENELEC members. Ref. No. EN 61041-5:1997 EEN61041-5:1997 BSI 03-1999 2 Foreword The text of document 100B/45/FDIS, future edition1 of IEC 61041-5, prepared by SC60B (transformed into SC 100B, Recording, of IECTC100, Audio, video and multimedia systems and equipment), was submitted to the IEC- CEN
19、ELEC parallel vote and was approved by CENELEC as EN 61041-5 on 1997-07-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard,Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the Internationa
20、l Standard IEC61041-5:1997 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 Introduction 5 Section 1. General requirements 1.1 Scope and object 5 1.2 Normative references 5 1.3 Conditions of measurement 5 1.4 Definitions 7 Section 2. Video characteris
21、tics, luminance signal (NTSC/PAL) 2.1 Luminance signal-to-noise ratio 8 2.2 Horizontal resolution 8 2.3 Vertically correlated waveform distortion (waveform distortion of vertical luminance signal) 9 2.4 Diagonal resolution 10 2.5 Frequency characteristics of diagonal resolution (i) (frequency respon
22、se in two-dimensional frequency domain) 11 2.6 Frequency characteristics of diagonal resolution (ii) (frequency response in Y/C separation system) 11 Section 3. Video characteristics, chrominance signal (NTSC/PAL) 3.1 Signal-to-noise ratio 12 3.2 Vertical picture displacement 13 3.3 Vertical picture
23、 distortion (waveform correlation distortion of chrominance signal) 14 3.4 Flicker 14 Section 4. Mutual characteristics, chrominance/luminance signals (NTSC/PAL) 4.1 Luminance signal separation (general) 15 4.2 Luminance signal separation at colour change points 15 4.3 Chrominance signal separation
24、16 4.4 Crosstalk in electromagnetic conversion system 16 Annex ZA Normative references to international publications with their corresponding European publications Inside back cover Figure 1 Composite video test signal 17 Figure 2 S luminance test signal 17 Figure 3 S chrominance test signal 17 Figu
25、re 4 Block diagram for composite video input 18 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-
26、04-01EN61041-5:1997 BSI 03-1999 3 Page Figure 5 Block diagram for S video input 18 Figure 6 Composite video test signal 18 Figure 7 Block diagram for composite video signal 18 Figure 8 Block diagram for S video signal 19 Figure 9 Composite video test signal 19 Figure 10 Waveform of overshoot 19 Figu
27、re 11 Waveform of pre-shoot 20 Figure 12 Waveform of smear 20 Figure 13 Waveform of rise and fall times 20 Figure 14 Waveform associated with reproduction of 1H/2H/3H pulses 20 Figure 15 Test signal on a TV monitor 21 Figure 16 Waveform for composite video signal 21 Figure 17 Waveform for S video in
28、put 21 Figure 18 Test signal on a TV monitor 22 Figure 19 Waveform identifying measurement points 22 Figure 20 Multiburst test signal 22 Figure 21 Measurement of burst levels 23 Figure 22 Composite video test signal 23 Figure 23 S luminance test signal 23 Figure 24 S chrominance test signal 23 Figur
29、e 25 Block diagram for composite video input 24 Figure 26 Block diagram for S video input 24 Figure 27 Composite colour window test signal 24 Figure 28 S luminance window test signal 24 Figure 29 S chrominance window test signal 25 Figure 30 Block diagram for composite video input 25 Figure 31 Block
30、 diagram for S video input 25 Figure 32 Waveform of S luminance signal 25 Figure 33 Waveform of S chrominance signal at line 0 (example measurement 1) 26 Figure 34 Waveform of S chrominance signal at line +1/2 (example measurement 2) 26 Figure 35 Waveform of S chrominance signal at line +1 (example
31、measurement 3) 26 Figure 36 Measurement of chrominance signal level 27 Figure 37 Block diagram for measurement 27 Figure 38 Example of colour vector measurement 27 Page Figure 39 Block diagram for measurement 27 Figure 40 Measurement of signal levels 28 Figure 41 Test signal 28 Figure 42 Measurement
32、 of signal levels 28 Figure 43 Multiburst test signal 28 Figure 44 Measurement of signal levels 29 Figure 45 Video frequency sweep test signal 29 Figure 46 Block diagram for measurement 29 Figure 47 Measurement of signal levels 30 Table 1 Setting of colour noise meter 84 blankEN61041-5:1997 BSI 03-1
33、999 5 Introduction This part of IEC61041 has been prepared for the reasons given below. Part 1 of IEC61041 applies to non-broadcast video tape recorders which record the video signal within the video bandpass frequencies of home-use TV receivers. This part of IEC61041, however, applies to other type
34、s of non-broadcast video tape recorders (hereinafter referred to as high-band video tape recorders) which record the video signal with greater than the normal video bandpass frequencies, for high resolution video recording. This part of IEC61041 is to be referred to particularly when characteristics
35、 of the video and audio signals recorded and reproduced using high-band video tape recorders are to be checked and measured. Section 1. General requirements 1.1 Scope and object This part of IEC61041 specifies the general requirements for methods of measurement for high-band video tape recorders, in
36、cluding those equipped with Y/C video connector(s) (NTSC/PAL). This part of IEC61041 is applicable both to machines using normal input/output connectors for the measurement of the composite video signal, and to machines using the Y/C video connector(s) (herein after referred to as S video connectors
37、) for the measurement of the Y/C separated video signal. This part of IEC61041 is applicable when characteristics of the video and audio signals recorded and reproduced using high-band video tape recorders are to be checked and measured. The object of this part is to describe the methods of measurem
38、ent for non-broadcast video tape recorders. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC61041. At the time of publication, the editions indicated were valid. All normative documents are
39、subject to revision, and parties to agreements based on this part of IEC61041 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60094
40、-2:1994, Magnetic tape sound recording and reproducing systems Part 2: Calibration tapes. 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 60735:1991, Measur
41、ing methods for video tape properties. IEC 61105:1991, Reference tapes for video tape recorder systems. ITU-R Recommendation 471-1:1990, Nomenclature and description of colour bar signals (Vol. X1-1). EIA RS-189A:1976, Encoded colour bar signal. 1.3 Conditions of measurement 1.3.1 Environmental cond
42、itions and preparation of the tape For the environmental conditions for measurement and also for the preparation required for the video test tape, see the following subclauses. 1.3.1.1 Ambient temperature and relative humidity Carry out measurement under ambient temperature within a range of20C 2C a
43、nd relative humidity within a range of (50 2)%. Ambient temperature may be within a range5C and35C, and relative humidity may be within a range45% and75% if these tolerances do not affect the results of measurement. Record the temperature and the humidity at the time of measurement with the results
44、of measurement. 1.3.1.2 Preparation for the video test tape Leave the video test tape for24h or more in the same conditions as the environmental conditions of measurement so that the measurement can be carried out accurately under steady conditions.EN61041-5:1997 6 BSI 03-1999 1.3.2 Power supply Reg
45、arding the specifications of the power supply and warm-up time for the video tape recorder to be measured, see the following subclauses. 1.3.2.1 For a video tape recorder which is operated from an a.c.power supply only Use the a.c.power supply which conforms to the power requirements for the video t
46、ape recorder under test. Voltage regulation shall be 2,5% or less. Frequency deviation shall be 0,5% or less. 1.3.2.2 For a video tape recorder which is operated from a d.c.power supply only (including battery-operated video tape recorders) Use the d.c.power supply which conforms to the voltage requ
47、irements for the video tape recorder under test. Voltage regulation shall be 2,5% or less. 1.3.2.3 For a video tape recorder which can be operated from either an a.c.or d.c. power supply Use the a.c.power supply. However, if there is doubt about the results of any measurement obtained using only the
48、 a.c.power supply, repeat using the d.c.power supply. 1.3.2.4 Warm-up time The video tape recorder to be tested should be switched to the standby mode for3h before starting measurements. This time is required for video tape recorders equipped with a heater on the cylinder of the head drum assembly.
49、1.3.3 Video test tape Use the video test tape which conforms to the video tape specifications of the video tape recorder under test. Record the type of the tape and the name of the manufacturer of the tape with the results of measurement. 1.3.4 Test signals Use the test signals specified below for measurement. 1.3.4.1 The video signal Use a video signal which has a100% amplitude level white signal of44s inserted in every ho
