ISO/IEC 14496-3:2009/Amd 1:2009
(Amendment)Information technology — Coding of audio-visual objects — Part 3: Audio — Amendment 1: HD-AAC profile and MPEG Surround signaling
Information technology — Coding of audio-visual objects — Part 3: Audio — Amendment 1: HD-AAC profile and MPEG Surround signaling
Technologies de l'information — Codage des objets audiovisuels — Partie 3: Codage audio — Amendement 1: Profil HD-AAC et signalisation périphérique MPEG
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 14496-3
Fourth edition
2009-09-01
AMENDMENT 1
2009-12-01
Information technology — Coding of
audio-visual objects —
Part 3:
Audio
AMENDMENT 1: HD-AAC profile and MPEG
Surround signaling
Technologies de l'information — Codage des objets audiovisuels —
Partie 3: Codage audio
AMENDEMENT 1: Profil HD-AAC et signalisation périphérique MPEG
Reference number
ISO/IEC 14496-3:2009/Amd.1:2009(E)
©
ISO/IEC 2009
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ISO/IEC 14496-3:2009/Amd.1:2009(E)
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ii © ISO/IEC 2009 – All rights reserved
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ISO/IEC 14496-3:2009/Amd.1:2009(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 1 to ISO/IEC 14496-3:2009 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.
© ISO/IEC 2009 – All rights reserved iii
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ISO/IEC 14496-3:2009/Amd.1:2009(E)
Information technology — Coding of audio-visual objects —
Part 3:
Audio
AMENDMENT 1: HD-AAC profile and MPEG Surround signaling
In 1.5.2.1 (Profiles), add:
13. The High Definition AAC (HD-AAC) Profile contains the audio object types 2 (AAC LC) and 37 (SLS).
In 1.5.2.1 (Profiles), Table 1.3 (Audio Profiles definition), add (changes are highlighted in grey):
Object Type ID Audio Object Type … High Definition AAC Profile
...
2 AAC LC X
…
37 SLS X
…
In 1.5.2.3 (Levels within the profiles), immediately before 1.5.2.4 add:
• Levels for the High Definition AAC Profile
Table AMD1-1 — Level for the High Definition AAC Profile
Level Max. channels/object Max. sampling rate [kHz] Max. word length [bit]
1 2 96 24
CBAC is not permitted.
In 1.5.2.4 (audioProfileLevelIndication), insert the following new entries into Table 1.14
(audioProfileLevelIndication values) and adapt the “reserved for ISO use” range accordingly (changes are
highlighted in grey):
Value Profile Level
…
0x3B High Definition AAC Profile L1
0x3C - 0x7F reserved for ISO use -
…
© ISO/IEC 2009 – All rights reserved 1
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ISO/IEC 14496-3:2009/Amd.1:2009(E)
In 1.6.2.1, replace Table 1.15 with the following table (where changes are highlighted in grey):
Table 1.15 — Syntax of AudioSpecificConfig()
Syntax No. of bits Mnemonic
AudioSpecificConfig ()
{
audioObjectType = GetAudioObjectType();
samplingFrequencyIndex; 4 bslbf
if ( samplingFrequencyIndex == 0xf ) {
samplingFrequency; 24 uimsbf
}
channelConfiguration; 4
...
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