ISO/IEC 14496-26:2010/Amd 4:2016

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
ISO/IEC 14496-26:2010/Amd.4:2016(E)

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ii © ISO/IEC 2016 – All rights reserved

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
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committees established by the respective organization to deal with particular fields of technical
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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).
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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

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/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,
...