1、 INTERNATIONAL STANDARD IEC62071-1 First edition2005-10 Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-7 Part 1:VTR specifications Reference number IEC 62071-1:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIE
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8、19 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONAL STANDARD IEC62071-1 First edition2005-10 Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-7 Part 1:VT
9、R specifications IEC 2005 Copyright-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
10、 de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch XD For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI
11、/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62071-1 IEC:2005(E)CONTENTS FOREWORD.6 1 Scope.8 2 Normative references.8 3 Abbreviations and acronyms.8 4 Environment and test conditions.9 4.1 Environment.9 4.2 Reference tape.10 4.3 Calibration tapes.10 5 Tape.10 5.
12、1 Base.10 5.2 Width.10 5.3 Width fluctuation.10 5.4 Reference edge straightness.10 5.5 Tape thickness.11 5.6 Transmissivity.11 5.7 Offset yield strength.11 5.8 Magnetic coating.11 5.9 Coating coercivity.11 6 Helical recordings.11 6.1 Tape speed.11 6.2 Sectors.11 6.3 Record locations and dimensions.1
13、1 6.4 Helical track record tolerance zones.12 6.5 Relative positions of recorded information.12 6.6 Gap azimuth.22 7 Programme track data.26 7.1 General.26 7.2 Insert and track information(ITI)sector.41 7.3 Audio sector.51 7.4 Video sector.56 7.5 Subcode sector.60 7.6 Edit gap.63 8 Audio processing.
14、64 8.1 General.64 8.2 Encoding mode.64 8.3 Audio shuffling.65 8.4 Audio auxiliary data(AAUX).66 8.5 Error correction code addition.69 9 Video processing.71 9.1 General.71 9.2 Compressed macro block and data-sync block.71 9.3 Video auxiliary data(VAUX).72 9.4 Error correction code addition.76 LICENSE
15、D TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62071-1 IEC:2005(E)3 10 Subcode processing.77 10.1 General.77 10.2 Subcode data.77 10.3 Error correction code addition.80 11 Longitudinal tracks.81 11.1 Control track.81 11.2 Cue track.82 Annex
16、A(normative)Tape tension.83 Annex B(normative)Track pattern during insert editing.84 Annex C(normative)Cross-tape track measurement technique.86 Annex D(normative)Frequency characteristics of F0 track.89 Annex E(informative)Relationship between tape length and recording time.90 Annex F(informative)Block diagram of D-7 recorder.91 Bibliography.92 Figure 1 Locations and dimensions of recorded tracks of 25 Mb/s format.13 Figure 2 Locations and dimensions of recorded tracks of 50 Mb/s format.14 Figu