ISO/IEC 14496-26:2010/Amd 3:2014
(Amendment)Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 3: Conformance for Low Delay AAC v2 profile
Information technology — Coding of audio-visual objects — Part 26: Audio conformance — Amendment 3: Conformance for Low Delay AAC v2 profile
Technologies de l'information — Codage des objets audiovisuels — Partie 26: Conformité audio — Amendement 3: Conformité pour profil Low Delay AAC v2
General Information
Relations
Buy Standard
Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 14496-26
First edition
2010-05-01
AMENDMENT 3
2014-01-15
Information technology — Coding of
audio-visual objects —
Part 26:
Audio conformance
AMENDMENT 3: Conformance for Low
Delay AAC v2 profile
Technologies de l'information — Codage des objets audiovisuels —
Partie 26: Conformité audio
AMENDEMENT 3: Conformité pour profil Low Delay AAC v2
Reference number
ISO/IEC 14496-26:2010/Amd.3:2014(E)
©
ISO/IEC 2014
---------------------- Page: 1 ----------------------
ISO/IEC 14496-26:2010/Amd. 3:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.
Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2014 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(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 3 to ISO/IEC 14496-26:2010 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.
It adds the conformance testing for the Low Delay AAC v2 profile defined in ISO/IEC 14496-3.
© ISO/IEC 2014 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
Information technology — Coding of audio-visual objects —
Part 26:
Audio conformance
AMENDMENT 3: Conformance for Low Delay AAC v2 profile
In 2, Normative references, add:
ISO/IEC 23003-1, Information technology — MPEG audio technologies — Part 1: MPEG Surround
ISO/IEC 23003-2, Information technology — MPEG audio technologies — Part 2: Spatial Audio Object Coding
(SAOC)
In 6.1, File name conventions, insert the following rows at the end of Table 2:
"
LD MPEG Surround er_ad_ldmps_ er_ad_ldmps_
(+ER AAC LD)
LD MPEG Surround er_eld_ldmps_ er_eld_ldmps_
(+ER AAC ELD)
"
After 7.25, Low Delay SBR, add:
7.26 Low Delay MPEG Surround
7.26.1 Compressed data
7.26.1.1 Characteristics
The Low Delay MPEG Surround tool can be used in combination with the ER AAC LD AOT and the ER AAC
ELD AOT.
The compressed data shall be stored as outlined in ISO/IEC 14496-3:2009, 4.5.2.13. The extension_type for
Low Delay MPS is EXT_LDSAC_DATA. The transport and signalling of LD MPS in an MPEG-4
Audio/Systems Environment is done in the same way as for the SAOC object type, as described in 8.2.2 of
ISO/IEC 23003-2. LD MPS uses the AOT 44. The ldsac_extension_data() is used to carry a
LDSacDataFrame() as described in B.4 of ISO/IEC 23003-2.
7.26.1.2 Test procedure
Each compressed data shall meet the syntactic and semantic requirements specified in ISO/IEC 23003-
2:2010, Annex B. If a syntactic element is not listed below, no restrictions apply to that element.
© ISO/IEC 2014 – All rights reserved 1
---------------------- Page: 4 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
7.26.1.2.1 Compressed MPEG-4 data payload
7.26.1.2.1.1 LDSpatialSpecificConfig()
bsSamplingFrequencyIndex
For further restrictions, see 7.26.1.2.2
bsSamplingFrequency For restrictions, see 7.26.1.2.2
bsFreqRes Shall not be encoded with a value of 0
bsFrameLength For restrictions, see 7.26.1.2.2
bsTreeConfig For restrictions, see 7.26.1.2.2
bsQuantMode Shall not be encoded with a value of 3
bsOneIcc Not present if bsTreeConfig = 7. No further restrictions apply
bsArbitraryDownmix No restrictions apply
bsFixedGainsSur Not present if bsTreeConfig = 7. Shall be in the range 0…4
bsFixedGainsLFE Not present if bsTreeConfig = 7. Shall be in the range 0…4
bsFixedGainsDMX No restrictions apply
bsMatrixMode Not present if bsTreeConfig = 7. No further restrictions apply
bsTempShapeConfig Shall not be encoded with a value of 3
bsDecorrConfig Shall not be encoded with a value of 3
bs3DaudioMode Not present if bsTreeConfig = 7. No further restrictions apply
bsEnvQuantMode Shall be 0
bs3DaudioHRTFset Shall be 0
7.26.1.2.1.2 OttConfig()
bsOttBands Shall not be encoded with a value larger than numBands given in table Table B.9 of
ISO/IEC 23003-2:2010
7.26.1.2.1.3 TttConfig()
bsTttDualMode No restrictions apply
bsTttModeLow Shall be in the range of 0.5
bsTttModeHigh Shall be in the range of 0.5
bsTttBandsLow Shall not be encoded with a value larger than numBands given in table Table B.9 of
ISO/IEC 23003-2:2010
7.26.1.2.1.4 ParamHRTFset()
bsHRTFfreqRes Shall not be encoded with a value of 0
bsHRTFasymmetric No restrictions apply
bsHRTFlevelLeft No restrictions apply
bsHRTFlevelRight No restrictions apply
bsHRTFphase No restrictions apply
bsHRTFphaseLR No restrictions apply
bsHRTFicc No restrictions apply
bsHRTFiccLR No restrictions apply
2 © ISO/IEC 2014 – All rights reserved
---------------------- Page: 5 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
7.26.1.2.1.5 SpatialExtensionConfig()
bsSacExtType Shall be in the range of 2.15. Note that in the case of values indicated as “reserved”
in Table 54 of ISO/IEC 23003-1:2007, the parsing function
SpatialExtensionConfigData(bsSacExtType) shall return the value 0, such that
possibly present data is read as bsFillBits (i.e., skipped) and correct parsing of the
bitstream can continue
bsSacExtLen No restrictions apply
bsSacExtLenAdd No restrictions apply
bsSacExtLenAddAdd No restrictions apply
bsFillBits No restrictions apply
7.26.1.2.1.6 SpatialExtensionConfigData(0)
None
7.26.1.2.1.7 SpatialExtensionConfigData(1)
None
7.26.1.2.1.8 TreeConfig()
bsOttBoxPresent No restrictions apply
bsOttDefaultCld No restrictions apply
bsOttModeLFE No restrictions apply
bsOttBands Shall not be encoded with a value larger than numBands given in Table B.9 of
ISO/IEC 23003-2:2010
bsOutputChannelPos Shall be in the range 0.26
For restrictions, see 7.26.1.2.2
7.26.1.2.1.9 LDSacDataFrame()
ldsacHeaderFlag No restrictions apply
ldsacHeaderLen No restrictions apply
ldsacHeaderLenAdd No restrictions apply
bsFillBits No restrictions apply
ldsacTimeAlignFlag No restrictions apply
ldsacTimeAlign Shall be 0
7.26.1.2.1.10 LDSpatialFrame()
bsIndependencyFlag No restrictions apply
7.26.1.2.1.11 FramingInfo()
bsFramingType No restrictions apply
bsNumParamSets For restrictions, see 7.26.1.2.2
bsParamSlot[ps] Shall be in the range 0.bsFrameLength
7.26.1.2.1.12 OttData()
No restrictions apply
© ISO/IEC 2014 – All rights reserved 3
---------------------- Page: 6 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
7.26.1.2.1.13 TttData()
ICC values of a certain TTT box shall not be encoded with a value of 0 if (bsTTTModeLow < 2 ||
(bsTTTDualMode==1&&bsTTTModeHigh<2))
7.26.1.2.1.14 SmgData()
bsSmoothMode No restrictions apply
bsSmoothTime No restrictions apply
bsFreqResStrideSmg No restrictions apply
bsSmgData No restrictions apply
7.26.1.2.1.15 TempShapeData()
bsTempShapeEnable No restrictions apply
bsTempShapeEnableChannel[ch]
No restrictions apply
7.26.1.2.1.16 EnvelopeReshapeHuff()
Hcod2D_EnvRes bsCodeW shall have a value of a set of values as defined by column ‘codeword’ of
Table A.25 of ISO/IEC 23003-1:2007 and shall have a length as defined by the
corresponding entry in column ‘length’
7.26.1.2.1.17 ArbitraryDownmixData()
No restrictions apply
7.26.1.2.1.18 EcData()
bsXXXdataMode Shall fulfil the requirements outlined in ISO/IEC 23003-1:2007, 6.1.13
bsDataPair Shall have the value 0 if setIdx == datasets-1. No further restrictions apply
bsQuantCoarseXXX No restrictions apply
bsFreqResStrideXXX No restrictions apply
7.26.1.2.1.19 EcDataPair()
bsPcmCodingXXX No restrictions apply
7.26.1.2.1.20 GroupedPcmData()
bsPcmWord No restrictions apply
7.26.1.2.1.21 DiffHuffData()
bsDiffType No restrictions apply
bsCodingScheme No restrictions apply
7.26.1.2.1.22 HuffData1D()
hcodFirstBand_XXX bsCodeW shall have a value out of a set of values as defined by column ‘codeword’
of Tables A.2, A.3 or A.4 of ISO/IEC 23003-1:2007, respectively, and shall have a
length as defined by the corresponding entry in column ‘length’
hcod1D_XXX_YY bsCodeW shall have a value out of a set of values as defined by column ‘codeword’
of Tables A.5, A.6 or A.7 of ISO/IEC 23003-1:2007, respectively, and shall have a
length as defined by the corresponding entry in column ‘length’
bsSign No restrictions apply
4 © ISO/IEC 2014 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
7.26.1.2.1.23 HuffData2DFreqPair()
hcodLavIdx bsCodeW shall have a value out of a set of values as defined by column ‘codeword’
of Table A.24 of ISO/IEC 23003-1:2007, and shall have a length as defined by the
corresponding entry in column ‘length’
hcod2D_XXX_YY_FP_LL
bsCodeW shall have a value out of a set of values as defined by column ‘codeword’
of the applicable table out of Tables A.8, A.9 or A.10 of ISO/IEC 23003-1:2007, and
shall have a length as defined by the corresponding entry in column ‘length’
hcod1D_XXX_YY bsCodeW shall have a value out of a set of values as defined by column ‘codeword’
of Tables A.5, A.6 or A.7 of ISO/IEC 23003-1:2007, respectively, and shall have a
length as defined by the corresponding entry in column ‘length’
bsSign No restrictions apply
7.26.1.2.1.24 SymmetryData()
bsSymBit[i] No restrictions apply
7.26.1.2.1.25 LsbData()
bsLsb For restrictions
...
INTERNATIONAL ISO/IEC
STANDARD 14496-26
First edition
2010-05-01
AMENDMENT 3
2014-01-15
Information technology — Coding of
audio-visual objects —
Part 26:
Audio conformance
AMENDMENT 3: Conformance for Low
Delay AAC v2 profile
Technologies de l'information — Codage des objets audiovisuels —
Partie 26: Conformité audio
AMENDEMENT 3: Conformité pour profil Low Delay AAC v2
Reference number
ISO/IEC 14496-26:2010/Amd.3:2014(E)
©
ISO/IEC 2014
---------------------- Page: 1 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
This CD-ROM contains:
1) the publication ISO/IEC 14496-26:2010/Amd.3:2014 in portable document format (PDF), which can
be viewed using Adobe® Acrobat® Reader;
2) an electronic insert containing test sequences.
Adobe and Acrobat are trademarks of Adobe Systems Incorporated.
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.
Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2014 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC 14496-26:2010/Amd.3:2014(E)
Installation
If this publication has been packaged as a zipped file, do NOT open the fil
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.