ISO IEC TS 20071-25-2017

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1、TECHNICALISO/IECTSSPECIFICATION20071-25Firstedition2017-02Informationtechnology—Userinterfacecomponentaccessibility—Part25:Guidanceontheaudiopresentationoftextinvideos,includingcaptions,subtitlesandotheron-screentextTechnologiesdel’information—Accessibilitéducomposantinterfaceutilisateu

2、r—Partie25:Lignesdirectricessurlaprésentationaudiodetextedansdesvidéos,ycomprisleslégendes,sous-titresetautrestextesàl’écranReferencenumberISO/IECTS20071-25:2017(E)©ISO/IEC2017ISO/IECTS20071-25:2017(E)COPYRIGHTPROTECTEDDOCUMENT©ISO/IEC2017,PublishedinSwitzerlandAllrightsreserved.Unlesso

3、therwisespecified,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO’smemberbodyinthecoun

4、tryoftherequester.ISOcopyrightofficeCh.deBlandonnet8•CP401CH-1214Vernier,Geneva,SwitzerlandTel.+41227490111Fax+41227490947copyright@iso.orgwww.iso.orgii©ISO/IEC2017–AllrightsreservedISO/IECTS20071-25:2017(E)ContentsPageForeword............................................................

5、............................................................................................................................................................................ivIntroduction.....................................................................................................

6、.............................................................................................................................v1Scope...........................................................................................................................................................

7、......................................................................12Normativereferences......................................................................................................................................................................................13Ter