IEC INTERNATIONAL STANDARD 62071-1 First edition 2005-10 Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape - Format D-7 - Part 1: VTR specifications IEC Referencenumber IEC 62071-1:2005(E) Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example, IEC 34-1is now referred to as IEC 60034-1. Consolidated editions The IEc is now publishing consolidated versions of its publications. For example. edition numbers 1.0, 1.1 and 1.2 refer, respectively,to the base publication, the amendments 1 and 2. FurtherinformationonIECpublications The technical content of IEC publications is kept under constant review by the IEC, this.publication, including itsvalidity, is available in the IEc Catalogue of publications (see below) in addition to new editions, amendments and corrigenda. information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: IEc Web Site (www.iec.ch) Catalogue of IEC publications The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summary of recently issued publications (www.iec.ch/online news/ justpub) is also available by email.Please contact the Customer Service Centre (see below) forfurther information. Customer Service Centre If you have any questions regarding this publication or need further assistance. please contact the Customer Service Centre: Email: [email protected] Tel: +41 22 919 02 11 +41229190300 Fax: IEC INTERNATIONAL STANDARD 62071-1 First edition 2005-10 Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape - Format D-7 - Part 1: VTR specifications @IEC 2005—Copyright-all rights reserved mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: [email protected] Web: www.iec.ch XD IEC PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission MekAyHapoAHag3nekTpoTexHuyeckag KomwcCWg For price, see current catalogue 62071-1 @ IEC:2005(E) 2 CONTENTS FOREWORD. .6 Scope. 8 Normative references 8 3 Abbreviationsandacronyms 4 Environmentandtestconditions 9 4.1 Environment 4.2 Reference tape. 10 4.3 Calibration tapes Tape 5 .10 5.1 Base. 10 5.2 Width 10 5.3 Width fluctuation.... 10 5.4 Reference edge straightness 5.5 Tape thickness 5.6 Transmissivity 5.7 Offset yield strength. 5.8 Magnetic coating 5.9 Coating coercivity . Helical recordings.. 6 6.1 Tape speed. 6.2 Sectors... 6.3 Recordlocationsanddimensions. 6.4 Helical track record tolerance zones 12 6.5 Relative positions of recorded information 12 6.6 Gapazimuth 22 Programme track data 7.1 General .26 7.2 Insert and track information (ITI)sector .41 7.3 Audio sector 7.4 Video sector 7.5 Subcode sector.. ...60 7.6 Edit gap.. ...63 8 Audio processing .64 8.1 General.. ..64 8.2 Encoding mode. .64 Audio shuffling.. ..65 8.3 8.4 Audio auxiliary data (AAUX). ..66 8.5 Error correction code addition. ..69 9 Video processing . .71 9.1 General... .71 .71 9.2 Compressed macro block and data-sync block 9.3 Video auxiliary data (VAUX). .72 9.4 Error correction code addition.. .76 62071-1 @ IEC:2005(E) -3 10 Subcodeprocessing .77 10.1 General... 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 .83 Annex A(normative)Tape tension.. Annex B (normative) Track pattern during insert edit