1、Information technology Coding of audio-visual objects Part14:MP4 file format AMENDMENT1:HandlingofMPEG-4audioenhancementlayersAmendment 1:2012 (IDT) toNational Standard of CanadaCAN/CSA-ISO/IEC 14496-14-04(ISO/IEC 14496-14:2003, IDT)NOT FOR RESALE.PUBLICATION NON DESTINE LA REVENTE.CSA Standards Upd
2、ate ServiceAmendment 1:2012 toCAN/CSA-ISO/IEC 14496-14-04March 2012Title:Information technology Coding of audio-visual ob jects Part14:MP4 file format AMENDMENT1:Handlingo fMPEG-4audioenhancementlayersPagination:5 pages (iii preliminary and 2 text)To register for e-mail notification about any update
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4、s policy on privacy at csagroup.org/legal to find out how we protect your personal information.Reference numberISO/IEC 14496-14:2003/Amd.1:2010(E)ISO/IEC 2010INTERNATIONAL STANDARD ISO/IEC14496-14First edition2003-11-15AMENDMENT 12010-06-15Information technology Coding of audio-visual objects Part 1
5、4: MP4 file format AMENDMENT 1: Handling of MPEG-4 audio enhancement layers Technologies de linformation Codage des objets audiovisuels Partie 14: Format de fichier MP4 AMENDEMENT 1: Traitement des couches damlioration MPEG-4 audio ISO/IEC 14496-14:2003/Amd.1:2010(E) PDF disclaimer This PDF file may
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9、010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the co
10、untry of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO/IEC 2010 All rights reservedAmendment 1:2012 to CAN/CSA-ISO/IEC 14496-14-04ISO/IEC 14496-14:2003/Amd.1:2010(E) ISO/IEC 2010 All r
11、ights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standa
12、rds through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and I
13、EC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is
14、 to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possi
15、bility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Amendment 1 to ISO/IEC 14496-14:2003 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcom
16、mittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Amendment 1:2012 to CAN/CSA-ISO/IEC 14496-14-04ISO/IEC 14496-14:2003/Amd.1:2010(E) ISO/IEC 2010 All rights reserved 1Information technology Coding of audio-visual objects Part 14: MP4 file format AMENDMENT 1: Handling of
17、MPEG-4 audio enhancement layers In Clause 2, replace: ISO/IEC 14496-1:2001, Information technology Coding of audio-visual objects Part 1: Systems with: ISO/IEC 14496-1:2010, Information technology Coding of audio-visual objects Part 1: Systems In 5.1.1, replace: The syntax for ObjectDescriptor and I
18、nitialObjectDescriptor is described in 8.6.2 through 8.6.4. with: The syntax for ObjectDescriptor and InitialObjectDescriptor is described in 7.2.6 of ISO/IEC 14496-1:2004. In 5.1.2, replace: The semantics for ObjectDescriptor and InitialObjectDescriptor are described in 8.6.2 through 8.6.4. The con
19、tents of this box are formed by taking an object descriptor or initial object descriptor and: with: The semantics for ObjectDescriptor and InitialObjectDescriptor are described in 7.2.6 of ISO/IEC 14496-1:2004. The contents of this box are formed by taking an object descriptor or initial object desc
20、riptor and: In 5.2, replace: dpnd - this track has an MPEG-4 dependency on the referenced track with: dpnd - this track has an MPEG-4 dependency on the referenced track. If the track type is an MP4AudioEnhancementSampleEntry as defined in clause 5.6 then this track-reference is mandatory and indicat
21、es a strong dependency, i.e. the track containing the reference cannot be decoded without the referenced track. Amendment 1:2012 to CAN/CSA-ISO/IEC 14496-14-04ISO/IEC 14496-14:2003/Amd.1:2010(E) 2 ISO/IEC 2010 All rights reservedIn 5.6, replace: For visual streams, a VisualSampleEntry is used; for a
22、udio streams, an AudioSampleEntry. For all other MPEG-4 streams, a MpegSampleEntry is used. Hint tracks use an entry format specific to their protocol, with an appropriate name. with: For visual streams, an MP4VisualSampleEntry is used; for audio streams which are not enhancement layers, i.e. not a
23、scalable extension, an MP4AudioSampleEntry is used. For audio streams which are enhancement layers, an MP4AudioEnhancementSampleEntry is used. For all other MPEG-4 streams, an MpegSampleEntry is used. Hint tracks use an entry format specific to their protocol, with an appropriate name. In 5.6, add t
24、he following paragraph: An MP4AudioEnhancementSampleEntry indicates that this track contains MPEG audio data that is enhancement audio data only (e.g. a spatial or quality enhancement) and the track cannot be decoded without the referenced audio track, as indicated by a mandatory track-reference of
25、type dpnd. In 5.6.1, add the following text to the fixed-size text: class MP4AudioEnhancementSampleEntry() extends AudioSampleEntry (m4ae) ESDBox ES; Amendment 1:2012 to CAN/CSA-ISO/IEC 14496-14-04ISO/IEC 14496-14:2003/Amd.1:2010(E) ICS 35.040 ISO/IEC 2010 All rights reserved Copyright NoticeThis Am
26、endment to the International Standard contains information copyright protected by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). Except as permitted under the laws of Canada, no extract of this Amendment to the International Standard
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