IEC INTERNATIONAL STANDARD 61937-8 First edition 2006-10 Digital Audio- Interface for non-linear PcM encoded audio bitstreams applying IEc 60958 - Part 8: Non-linear PcM bitstreams according to the Windows Media Audio (WMA)Professionalformat IEC Referencenumber IEC 61937-8:2006(E) Publication numbering As from 1 January 1997 all IEc 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 base publication incorporating amendment1and the base publication incorporating 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 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 and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC JustPublished 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) for further information. CustomerServiceCentre If you have any questions regarding this publication or need further assistance, please contactthe Customer Service Centre: Email: [email protected] Tel: +4122 919 0211 +4122919 0300 Fax: IEC INTERNATIONAL STANDARD 61937-8 First edition 2006-10 Digital Audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 3- Part 8: Non-linear PcM bitstreams according to the WindowsMediaAudio(WMA)Professionalformat @IEC 2006 —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]: www.iec.ch M IEC PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission MexayHapoAHag3nekTpoTexHuyeckagKomucCg For price, see current cafalogue 61937-8@IEC:2006(E) 2 CONTENTS FOREWORD. Scope Normative references 2 3 Terms, definitions and abbreviations. 3.1 Terms and definitions 3.2 Abbreviations. 3.3Presentation convention.. MappingoftheaudiobitstreamontoIEC61937 4.1 General... 4.2 Windows Media Audio Professionalburst-info 6 5 Format of WMA Professional data-burst 6 5.1 General. 5.2 Pause data-burst 5.3 Audio data-bursts Bibliography. 13 Figure 1-Windows Media Audio Professionaltype I data-burst Figure 2-Latency of WMA Professional typeI decoding . .8 Figure 3-Windows Media Audio Professional type Il data-burst ... Figure4-Latency of WMAProfessionaltype Il decoding. Figure 5-Windows Media Audio Professional type Ill data-burst .. Figure 6 - Latency of WMA Professional type IlI decoding ... Figure 7 -Windows Media Audio Professional type IV data-burst ... .11 Figure 8 - Latency of WMA Professional type IV decoding.. 11 Table 1 - Fields of burst-info. Table 2-Repetition period of Pause data-bursts.... Table 3-Data-type-dependent when data-type = 18 and sub-type = 0... Table 4-Data-type-dependent when data-type= 18 and sub-type = 1. Table 5-Data-type-dependent when data-type = 18 and sub-type = 2..... Table 6 - Data-type-dependent when data-type = 18 and sub-type = 3. 11 61937-8 @ IEC:2006(E) - 3 - INTERNATIONALELECTROTECHNICALCOMMISSION DIGITAL AUDIO INTERFACEFORNON-LINEARPCMENCODED AUDIOBITSTREAMSAPP