IEC IEC 62944 Edition 1.02016-12 NTERNATIONAL STANDARD Audio, video and multimedia systems and equipment - Digital television accessibility - Functional specifications IEC 62944:2016-12(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form either IEC or IEC's member National Committee in the country of the requester. if you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varembé Fax: +41 22 919 03 00 CH-1211 Geneva 20 [email protected] Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEc publications latest edition, a corrigenda or an amendment might have been published. Electropedia - www.electropedia.org IEC Catalogue - webstore.iec.ch/catalogue stand-alone application for consulting The the entire The world's leading online dictionary of electronic and bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical iPad. Vocabulary (IEV) online IEC publications search - www.iec.ch/searchpub IEc Glossary - std.iec.ch/glossary The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of iEC publications issued since 2002. Some entries have been committee,...). It also gives information on projects, replaced collected from earlier publications of IEC TC 37, 77, 86 and and withdrawn publications. CISPR. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published IEc Customer Service Centre - webstore.iec.ch/csc details all new publications released. Available online and If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service also once a month by email. Centre: [email protected]. IEC IEC 62944 Edition 1.02016-12 NTERNATIONAL STANDARD Audio, video and multimedia systems and equipment - Digital television accessibility - Functional specifications INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 11.180.99; 33.160.01; 35.240.95 ISBN 978-2-8322-3686-4 Warning! Make sure that you obtained this publication from an authorized distributor. Registered trademark of the International Electrotechnical Commission