ISO/IEC 14496-4:2004/Amd 20:2008

INTERNATIONAL ISO/IEC
STANDARD 14496-4
Second edition
2004-12-15
AMENDMENT 20
2008-08-15


Information technology — Coding of
audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 20: Scalable to lossless
coding (SLS) conformance
Technologies de l'information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
AMENDEMENT 20: Conformité de codage extensible à sans perte
(SLS)





Reference number
ISO/IEC 14496-4:2004/Amd.20:2008(E)
©
ISO/IEC 2008

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ISO/IEC 14496-4:2004/Amd.20:2008(E)
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ISO/IEC 14496-4:2004/Amd.20:2008(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 20 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.
This Amendment adds the conformance testing for the SLS audio object types defined in 14496-3.

© ISO/IEC 2008 – All rights reserved iii

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ISO/IEC 14496-4:2004/Amd.20:2008(E)

Information technology — Coding of audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 20: Scalable to lossless coding (SLS) conformance
In 6.5.1, File name conventions, add the following row at the end of Table 29:
Table 29 – File name conventions
SLS ___ ___

In 6.5.1, File name conventions, add the following text:
can be 16 or 24 and indicates the bit resolution of the coded wavefile

At the end of 6.6, Audio Object Types, add the following subclauses:
6.6.23 SLS (Scalable Lossless Coding)
6.6.23.1 Compressed data
6.6.23.1.1 Characteristics
Conformant SLS compressed MPEG-4 data shall have the SLS data stored as outlined in ISO/IEC 14496-3.
6.6.23.1.2 Test procedure
Each compressed data shall meet the syntactic and semantic requirements specified in ISO/IEC 14496-3. The
decoded data shall also meet the requirements defined in ISO/IEC 14496-3. If a syntactic element is not listed
below, no restrictions apply to that element. The reserved element shall be encoded with the value zero.
6.6.23.1.2.1 Compressed MPEG-4 data payload
6.6.23.1.2.1.1 AudioSpecificConfig
audioObjectType: Shall be encoded with the value 37 (core mode) or 38 (non-core mode).
6.6.23.1.2.1.2 SLSSpecificConfig
pcmWordLength: Shall be encoded with
...