1、 CSA Standards Update ServiceAmendment 1:2010 toCAN/CSA-ISO/IEC 14496-3-10December 2010Title: Information technology Coding of audio-visual objects Part 3: Audio AMENDMENT 1: HD-AAC profile and MPEG Surround signalingPagination:8 pages (iii preliminary and 5 text)To register for e-mail notification
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3、Visit CSAs policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.Reference numberISO/IEC 14496-3:2009/Amd.1:2009(E)ISO/IEC 2009INTERNATIONAL STANDARD ISO/IEC14496-3Fourth edition2009-09-01AMENDMENT 12009-12-01Information technology Coding of audio-visual o
4、bjects Part 3: Audio AMENDMENT 1: HD-AAC profile and MPEG Surround signaling Technologies de linformation Codage des objets audiovisuels Partie 3: Codage audio AMENDEMENT 1: Profil HD-AAC et signalisation priphrique MPEG International Electrotechnical Commission (IEC), 2007. All rights reserved. NOT
5、 FOR RESALE. Commission lectrotechnique Internationale (CEI), 2007. Tous droits rservs. PUBLICATION NON DESTINE LA REVENTE.ISO/IEC 14496-3:2009/Amd.1:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed bu
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10、 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO/IEC 2009 All rights reservedAmendment 1:2010 to CAN/CSA-ISO/IEC 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) ISO/IEC 2009 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International E
11、lectrotechnical 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 te
12、chnical 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 tec
13、hnical 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
14、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
15、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. Amendment 1:2010 to CAN/CSA-ISO/IE
16、C 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) ISO/IEC 2009 All rights reserved 1Information 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 obj
17、ect 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 f
18、or 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 (audioProfileLe
19、velIndication 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 - Amendment 1:2010 to CAN/CSA-ISO/IEC 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) 2 ISO/IEC 2009 A
20、ll rights reservedIn 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 ( samplingFreque
21、ncyIndex = 0xf ) samplingFrequency; 24 uimsbf channelConfiguration; 4 bslbf sbrPresentFlag = -1; psPresentFlag = -1; mpsPresentFlag = -1; if ( audioObjectType = 5 | audioObjectType = 29 ) extensionAudioObjectType = 5; sbrPresentFlag = 1; if ( audioObjectType = 29 ) psPresentFlag = 1; extensionSampli
22、ngFrequencyIndex; 4 uimsbf if ( extensionSamplingFrequencyIndex = 0xf ) extensionSamplingFrequency; 24 uimsbf audioObjectType = GetAudioObjectType(); if ( audioObjectType = 22 ) extensionChannelConfiguration; 4 uimsbf else extensionAudioObjectType = 0; switch (audioObjectType) case 1: case 2: case 3
23、 case 4: case 6: case 7: case 17: case 19: case 20: case 21: case 22: case 23: GASpecificConfig(); break: case 8: CelpSpecificConfig(); break; case 9: HvxcSpecificConfig(); break: case 12: TTSSpecificConfig(); break; Amendment 1:2010 to CAN/CSA-ISO/IEC 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) I
24、SO/IEC 2009 All rights reserved 3Table 1.15 (continued) Syntax No. of bits Mnemonic case 13: case 14: case 15: case 16: StructuredAudioSpecificConfig(); break; case 24: ErrorResilientCelpSpecificConfig(); break; case 25: ErrorResilientHvxcSpecificConfig(); break; case 26: case 27: ParametricSpecific
25、Config(); break; case 28: SSCSpecificConfig(); break; case 30: mpsPresentFlag = 1; sacPayloadEmbedding; 1 uimsbf SpatialSpecificConfig(); break; case 32: case 33: case 34: MPEG_1_2_SpecificConfig(); break; case 35: DSTSpecificConfig(); break; case 36: fillBits; 5 bslbf ALSSpecificConfig(); break; ca
26、se 37: case 38: SLSSpecificConfig(); break; case 39: ELDSpecificConfig(channelConfiguration); break: case 40: case 41: SymbolicMusicSpecificConfig(); break; default: /* reserved */ switch (audioObjectType) Amendment 1:2010 to CAN/CSA-ISO/IEC 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) 4 ISO/IEC 200
27、9 All rights reservedTable 1.15 (continued) Syntax No. of bits Mnemonic case 17: case 19: case 20: case 21: case 22: case 23: case 24: case 25: case 26: case 27: case 39: epConfig; 2 bslbf if ( epConfig = 2 | epConfig = 3 ) ErrorProtectionSpecificConfig(); if ( epConfig = 3 ) directMapping; 1 bslbf
28、if ( ! directMapping ) /* tbd */ extensionIdentifier = -1; if ( bits_to_decode() = 11 ) extensionIdentifier; 11 bslbf if ( extensionIdentifier = 0x2b7 ) extensionIdentifier = -1; if ( extensionAudioObjectType != 5 if ( extensionAudioObjectType = 5 ) sbrPresentFlag; 1 uimsbf if (sbrPresentFlag = 1) e
29、xtensionSamplingFrequencyIndex; 4 uimsbf if ( extensionSamplingFrequencyIndex = 0xf ) extensionSamplingFrequency; 24 uimsbf if ( bits_to_decode() = 12 ) extensionIdentifier; 11 bslbf if (extensionIdentifier = 0x548) extensionIdentifier = -1; psPresentFlag; 1 uimsbf if ( extensionAudioObjectType = 22
30、 ) sbrPresentFlag; 1 uimsbf if (sbrPresentFlag = 1) extensionSamplingFrequencyIndex; 4 uimsbf if ( extensionSamplingFrequencyIndex = 0xf ) extensionSamplingFrequency; 24 uimsbf extensionChannelConfiguration; 4 uimsbf Amendment 1:2010 to CAN/CSA-ISO/IEC 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) IS
31、O/IEC 2009 All rights reserved 5Table 1.15 (continued) Syntax No. of bits Mnemonic if (extensionIdentifier = -1 11 bslbf if ( extensionIdentifier = 0x76a ) if ( audioObjectType != 30 1 uimsbf if ( mpsPresentFlag = 1 ) sacPayloadEmbedding = 1; sscLen; 8 uimsbf if ( sscLen = 0xff ) sscLenExt; 16 uimsb
32、f sscLen += sscLenExt; SpatialSpecificConfig(); In 1.6.3.11, replace syncExtensionType by extensionIdentifier. After 1.6.3.17, add the following three new subclauses: 1.6.3.18 mpsPresentFlag A one bit field indicating the presence or absence of MPEG Surround data. The value 1 indicates that the mpsP
33、resentFlag was not conveyed in the AudioSpecificConfig(). In this case, a decoder supporting the Baseline MPEG Surround Profile shall support implicit signaling as defined in 7.2.3 and 7.2.4 of ISO/IEC 23003-1:2007. 1.6.3.19 sscLen A helper variable indicating the number of bytes of the subsequent S
34、patialSpecificConfig() data function including possible fill bits. 1.6.3.20 sscLenExt A helper variable indicating the additional number of bytes of the subsequent SpatialSpecificConfig() data function including possible fill bits. Amendment 1:2010 to CAN/CSA-ISO/IEC 14496-3-10ISO/IEC 14496-3:2009/Amd.1:2009(E) ICS 35.040 ISO/IEC 2009 All rights reserved
