ISO/IEC 14496-4:2004/Amd 14:2007
(Amendment)Information technology — Coding of audio-visual objects — Part 4: Conformance testing — Amendment 14: BSAC conformance
Information technology — Coding of audio-visual objects — Part 4: Conformance testing — Amendment 14: BSAC conformance
Technologies de l'information — Codage des objets audiovisuels — Partie 4: Essai de conformité — Amendement 14: Conformité BSAC
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INTERNATIONAL ISO/IEC
STANDARD 14496-4
Second edition
2004-12-15
AMENDMENT 14
2007-12-01
Information technology — Coding of
audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 14: BSAC conformance
Technologies de l'information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
AMENDEMENT 14: Conformité BSAC
Reference number
ISO/IEC 14496-4:2004/Amd.14:2007(E)
©
ISO/IEC 2007
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ISO/IEC 14496-4:2004/Amd.14:2007(E)
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ISO/IEC 14496-4:2004/Amd.14:2007(E)
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INTERNATIONAL ISO/IEC
STANDARD 14496-4
Second edition
2004-12-15
AMENDMENT 14
2007-12-01
Information technology — Coding of
audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 14: BSAC conformance
Technologies de l'information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
AMENDEMENT 14: Conformité BSAC
Reference number
ISO/IEC 14496-4:2004/Amd.14:2007(E)
©
ISO/IEC 2007
---------------------- Page: 1 ----------------------
ISO/IEC 14496-4:2004/Amd.14:2007(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2007
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
ISO's member body in the country 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
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Published in Switzerland
ii © ISO/IEC 2007 – All rights reserved
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ISO/IEC 14496-4:2004/Amd.14:2007(E)
Foreword
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 Standards 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 IEC, 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 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 possibility 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 14 to ISO/IEC 14496-4:2004 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.
It specifies the conformance testing of BSAC multichannel and BSAC extensions as specified in
ISO/IEC 14496-3:2005/Amd.2:2006 and ISO/IEC 14496-3:2005/Amd.5:2007.
© ISO/IEC 2007 – All rights reserved iii
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ISO/IEC 14496-4:2004/Amd.14:2007(E)
Information technology — Coding of audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 14: BSAC conformance
In subclause 6.6.6 ER BSAC, replace:
However, only mono or 2-channel stereo objects are supported.
with:
The multichannel ER BSAC object is supported with BSAC channel extension payload.
In subclause 6.6.6.2.2 Test procedure, replace “Table 52” with “Table 52.A” (three occurrences).
At the end of subclause 6.6.6.2.2 Test procedure, add the following paragraph.
The conformance bitstreams corresponding to BSAC Extensions for the multichannel extension are the
‘er_bs09’ ~ ‘er_bs11’ as listed in Table 52.A. The conformance testing criterion for the multichannel extension
is same as ER BSAC.
The conformance bitstreams corresponding to BSAC Extensions for the SBR extension are listed in Table
52.B. The conformance testing criterion for the SBR extension is specified in subclause 6.6.17. The SBR
conformance test method of BSAC Extensions is different from that of HE-AAC in terms of parsing the SBR
payload. In figure AMD8-2, the ‘Read store/input’ module is to parse the SBR payload from BSAC Extensions
payload which can be realized by either decoding the whole BSAC Extensions payload or seeking the
‘sync_word’ in the extensions payload.
The ‘coreSetup’ of naming convention for BSAC Extensions is the ‘xx_sbr__’ where the ‘nchan’
represents the number of channel and the ‘fs’ is the sampling rate of SBR tool. By comparing the decoded
wave with the reference wave for the different ‘highestLayer’, the ‘HF overlap’ decoding module specified in
14496-3:2005 subclause 4.5.2.11.4 can be checked if it’s implemented correctly. The testing criterion with
‘Diffmax’ and ‘RMS max’ shall be applied only when the bitstream is decoded up to top layer.
© ISO/IEC 2007 – All rights reserved 1
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ISO/IEC 14496-4:2004/Amd.14:2007(E)
In subclause 6.6.6.2.3 Test sequences, change the table index from Table 52 to Table 52.A and extend Table
52.A with:
Table 52.A — ER BSAC Object Type Test Compressed data for Mobile Audio Internetworking
...
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