ISO/IEC 14496-26:2010/Amd 5:2018
(Amendment)Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 5: Conformance for new levels of ALS simple profile, SBR enhancements
Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 5: Conformance for new levels of ALS simple profile, SBR enhancements
Technologies de l'information — Codage des objets audiovisuels — Partie 26: Conformité audio — Amendment 5: Titre manque
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INTERNATIONAL ISO/IEC
STANDARD 14496-26
First edition
2010-05-01
AMENDMENT 5
2018-09
Information technology — Coding of
audio-visual objects —
Part 26:
Audio conformance
AMENDMENT 5: Conformance for
new levels of ALS simple profile, SBR
enhancements
Technologies de l'information — Codage des objets audiovisuels —
Partie 26: Conformité audio
AMENDEMENT 5
Reference number
ISO/IEC 14496-26:2010/Amd.5:2018(E)
©
ISO/IEC 2018
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ISO/IEC 14496-26:2010/Amd.5:2018(E)
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ISO/IEC 14496-26:2010/Amd.5:2018(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 document 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
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World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
A list of all parts in the ISO/IEC 14496 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
© ISO/IEC 2018 – All rights reserved iii
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ISO/IEC 14496-26:2010/Amd.5:2018(E)
Information technology — Coding of audio-visual
objects —
Part 26:
Audio conformance
AMENDMENT 5: Conformance for new levels of ALS simple
profile, SBR enhancements
3
Add a new paragraph as third paragraph of this subclause:
The conformance bitstreams and decoded wav-files package can be found at: http: //standards .iso
.org/iso -iec/14496/ -26/ed -1/en/amd/5
6.1
Replace the paragraph for 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
signalling, “twi” for QMF identification, “sr” for testing various combinations of sampling rates, and
"esbr" for testing SBR enhancements.
7.17.1.1
Add a new paragraph at the end of this subclause:
If SBR enhancements (eSBR) are used, eSBR data shall be stored as outlined in ISO/IEC 14496-3:2009,
Annex 8.A.
7.17.1.2.1.6
Add a new subclause at the end of this sublclause:
7.17.1.2.1.7 esbr_data()
The top level syntactic element for conveying SBR enhancement data to the decoder is defined in ISO/
IEC 14496-3:2009/Amd.7:2018. No restrictions apply to bitstream elements within esbr_data().
If SBR enhancements are used in combination with parametric stereo, ps_data() shall precede esbr_
data() in the compressed data.
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ISO/IEC 14496-26:2010/Amd.5:2018(E)
7.17.2.1
Add a new paragraph at the end of this subclause:
If no esbr_data() is present in the current frame the decoder shall resort to legacy SBR processing
(i.e. bs_sbr_preprocessing = 0; sbrPatchingMode = 1).
7.17.2.3
Update Table 69 with the grey-shaded columns/rows.
file base content bit QMF Iden- QMF enve- grid head- in- addi- SBR har- C Di RMS test proce-
name rate tification Accu- lope con- er verse tional pre-pro- monic R ff max dure
(kbit racy Ad- trol cha filter- sines cessing trans- C ma (lin
/s) juster tests nge ing tests tests poser x ear
Accu- tes tests tests val
racy ts ue)
al_sbr_twi none 24 y y — — — — y — — — — — —
al_sbr_qmf Sine 24 — y — — — — — — — — 5 1.4 maxDiff/
Sweep RMS
a
al_sbr_e rec- 24/ — — y — — — — — — y 90 2.0 maxDiff/
tangle 48 RMS
* 10Hz
sine
al_sbr_gh rec- 24/ — — — y y — — — — — 51 1.5 maxDiff/
tangle 48
...
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