ISO/IEC 14496-26:2010/Amd 4:2016
(Amendment)Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 4: AAC Additional Multichannel Conformance Data
Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 4: AAC Additional Multichannel Conformance Data
Technologies de l'information — Codage des objets audiovisuels — Partie 26: Conformité audio — Amendement 4: Données AAC de conformité multicanal supplémentaire
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 14496-26
First edition
2010-05-01
AMENDMENT 4
2016-11-15
Information technology — Coding of
audio-visual objects —
Part 26:
Audio conformance
AMENDMENT 4: AAC Additional
Multichannel Conformance Data
Technologies de l’information — Codage des objets audiovisuels —
Partie 26: Conformité audio
AMENDEMENT 4: Données AAC de conformité multicanal
supplémentaire
Reference number
ISO/IEC 14496-26:2010/Amd.4:2016(E)
©
ISO/IEC 2016
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ISO/IEC 14496-26:2010/Amd.4:2016(E)
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ii © ISO/IEC 2016 – All rights reserved
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ISO/IEC 14496-26:2010/Amd.4:2016(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
Amendment 4 to ISO/IEC 14496-26:2010 was prepared by ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
© ISO/IEC 2016 – All rights reserved iii
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ISO/IEC 14496-26:2010/Amd.4:2016(E)
Information technology — Coding of audio-visual
objects —
Part 26:
Audio conformance
AMENDMENT 4: AAC Additional Multichannel Conformance
Data
Page 6, 6.1
Replace
indicates the SBR module mainly targeted by the test sequence. Possible values are “e” for
testing the envelope adjuster “s” for testing sine addition, “gh” for testing time-grid transitions in
combination with changes of SBR header data, “i” for testing inverse filtering, “qmf” for testing the QMF
implementation, “cm” for testing various channel modes, “sig” for testing SBR signaling, “twi” for QMF
identification, and “sr” for testing various combinations of sampling rates.
with
indicates the SBR module mainly targeted by the test sequence. Possible values are “e” for
testing the envelope adjuster “s” for testing sine addition, “gh” for testing time-grid transitions in
combination with changes of SBR header data, “i” for testing inverse filtering, “qmf” for testing the QMF
implementation, “cm” and “gen” for testing various channel modes, “sig” for testing SBR signaling, “twi”
for QMF identification, and “sr” for testing various combinations of sampling rates.
Page 18, Table 7
Replace
samplingFrequencyIndex Level 1 Level 2 Level 3 Level 4 Level 5
/ samplingFrequency
High Efficiency AAC SBR pres- NA 0x6.0xc, 0x3.0xc, 0x3.0xc, 0x3.0xc,
Profile ent 0xf / 0xf / 0xf / 0xf /
<= 24000 <= 48000 <= 48000 <= 48000
(Note 1)
SBR not NA 0x3.0xc, 0x3.0xc, 0x3.0xc, 0x0.0xc,
present 0xf / 0xf / 0xf / 0xf /
<= 48000 <= 48000 <= 48000 <= 96000
Note 1: For Level 4, for one or two channels the maximum AAC sampling rate, with SBR present, is 48 kHz.
For more than two channels the maximum AAC sampling rate, with SBR present, is 24 kHz. (0x6.0xc, 0xf /
<= 24000)
extensionSamplingFrequencyIndex / Level 1 Level 2 Level 3,4 Level 5
extensionSamplingFrequency
High Efficiency AAC Profile NA 0x6.0xc, 0x3.0xc, 0x0.0xc,
0xf / 0xf / 0xf /
<= 24000 <= 48000 <= 96000
© ISO 2016 – All rights reserved 1
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ISO/IEC 14496-26:2010/Amd.4:2016(E)
with
samplingFrequencyIndex / Level 1 Level 2 Level 3 Level 4, Level 5,
samplingFrequency Level 6 Level 7
High Efficiency AAC SBR pres- NA 0x6.0xc, 0x3.0xc, 0x3.0xc, 0x3.0xc,
Profile ent 0xf / 0xf / 0xf / 0xf /
<= 24000 <= 48000 <= 48000 <= 48000
(Note)
SBR not NA 0x3.0xc, 0x3.0xc, 0x3.0xc, 0x0.0xc,
present 0xf / 0xf / 0xf / 0xf /
<= 48000 <= 48000 <= 48000 <= 96000
NOTE For Level 4, for one or two channels, the maximum AAC sampling rate, with SBR present, is 48 kHz.
For more than two channels, the maximum AAC sampling rate, with SBR present, is 24 kHz. (0x6.0xc, 0xf /
<= 24000)
extensionSamplingFrequencyIndex / Level 1 Level 2 Level 3,4,6 Level 5,7
extensionSamplingFrequency
High Efficiency AAC Profile NA 0x6.0xc, 0x3.0xc, 0x0.0xc,
...
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