1、 INTERNATIONAL STANDARD IEC62345 First edition2005-03 ID format for 50 mm magneto-optical disc system Reference number IEC 62345:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numbering As from 1 January 1997 all IE
2、C publications are issued with a designation in the 60000 series.For example,IEC 34-1 is 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
3、 base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information rela
4、ting to this publication,including its validity,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 publica
5、tion,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 da
6、te of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also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 Serv
7、ice Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFO
8、R INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONAL STANDARD IEC62345 First edition2005-03 ID format for 50 mm magneto-optical disc system IEC 2005 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electr
9、onic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue 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 XA For pri
10、ce,see current catalogue PRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62345 IEC:2005(E)CONTENTS FOREWORD.7 1 Scope.9 2 Normative refere
11、nces.9 3 Terms and definitions.9 4 Conventions and notations.12 4.1 Representation of numbers.12 4.2 Names.12 5 List of acronyms.13 6 General description of the optical disc cartridge.13 7 General requirements.14 7.1 Environments.14 7.2 Temperature shock.14 7.3 Safety requirements.15 8 Reference dri
12、ve.15 8.1 Optical system.15 8.2 Optical beam.16 8.3 Read channels.16 8.4 Tracking.17 8.5 Rotation of the disc.17 9 Mechanical and physical characteristics.17 9.1 Dimensional and physical characteristics of the cartridge.17 9.2 Dimensional,mechanical and physical characteristics of the disc.27 9.3 In
13、terface between cartridge and drive.32 10 Format of information.33 10.1 Track geometry.33 10.2 Track format.34 10.3 Frame format.35 10.4 ECC Block format.42 10.5 Recording code.43 10.6 Format of the Information Zone.45 10.7 Format of the Data Zone.46 10.8 Defect Management.51 11 Characteristics of e
14、mbossed information.55 11.1 Method of testing.55 11.2 Signals from grooves(see Figure 26).56 11.3 Signals from wobble groove(see Figure 27).57 11.4 Signal from fine clock marks(see Figure 28).58 12 Characteristics of the recording layer.59 12.1 Method of testing.59 12.2 Magneto-optical characteristi
15、cs.60 13 File system.63 13.1 Volume.63 13.2 File.73 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62345 IEC:2005(E)3 14 File format of Sound and Images.78 14.1 General.78 14.2 Directory Structure.78 14.3 File Format.79 Annex A(normat
16、ive)Air cleanliness class 100000.82 Annex B(normative)Measurement method of reference plane flatness.83 Annex C(normative)Measurement method of cartridge flatness.84 Annex D(normative)Measurement method of cartridge curvature.85 Annex E(normative)Test method for measuring the friction force.86 Annex F(normative)Format of the Data Field.88 Annex G(normative)Contents of Control Tracks.95 Annex H(normative)Relaxation by zones of the requirement for signals.99 Annex I(informative)Transportation.100
