CAN CSA-ISO IEC 14496-3D-2015 Information technology - Coding of audio-visual objects - Part 3 Audio AMENDMENT 4 New levels for AAC profiles.pdf

1、 ISO/IEC 2013. CSA Group 2015. All rights reserved. Unauthorized reproduction is strictly prohibited.Amendment 4:2015 (IDT) toCAN/CSA-ISO/IEC 14496-3:10(ISO/IEC 14496-3:2009, IDT)National Standard of CanadaAmendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10Information technology Coding of audio-vis

2、ual objects Part 3: AudioAMENDMENT 4: New levels for AAC profiles(ISO/IEC 14496-3:2009, IDT)Standards Update ServiceAmendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10December 2015Title: Information technology Coding of audio-visual objects Part 3: AudioAMENDMENT 4: New levels for AAC profilesTo re

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4、ps policy on privacy at www.csagroup.org/legal to find out how we protect yourpersonal information.Reference numberISO/IEC 14496-3:2009/Amd.4:2013(E)ISO/IEC 2013INTERNATIONAL STANDARD ISO/IEC14496-3Fourth edition2009-09-01AMENDMENT 42013-12-15Information technology Coding of audio-visual objects Par

5、t 3: Audio AMENDMENT 4: New levels for AAC profilesTechnologies de linformation Codage des objets audiovisuels Partie 3: Codage audio AMENDEMENT 4: Nouveaux niveaux pour profils AAC ISO/IEC 14496-3:2009/Amd.4:2013(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2013 All rights reserved. Unless otherwise spe

6、cified, 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

7、ISOs 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 copyrightiso.org Web www.iso.org ii ISO/IEC 2013 All rights reservedAmendment 4:2015 (IDT) toCAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd

8、.4:2013(E) ISO/IEC 2013 All rights reserved iiiForeword 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 develo

9、pment 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-government

10、al, 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

11、 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. At

12、tention 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 4 to ISO/IEC 14496-3:2009 was prepared by Joint Technical Committee ISO/IEC JTC 1, In

13、formation technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) ISO/IEC 2013 All rights reserved 1Information technology Coding of audio-visual objects Part 3: Audio AMEN

14、DMENT 4: New levels for AAC profiles 1 Notes from the editor Some modifications with respect to ISO/IEC 14496-3:2009 are highlighted by colored background as follows. These highlights shall be removed upon integration of the amendment into a future edition of ISO/IEC 14496-3. YELLOW Cross-references

15、 and subclause numbers that need to be checked and aligned with ISO/IEC 14496-3:2009. GRAY Changes relative to ISO/IEC 14496-3:2009 that are highlighted for better visibility. 2 Changes to the text of ISO/IEC 14496-3:2009 In 1.2 Normative references, add: ISO/IEC 23001-8, Information technology MPEG

16、 systems technologies Part 8: Coding-independent code points In 1.3 Terms and Definitions, add: 1.3.z SAOC-DE: Spatial Audio Object Coding Dialogue Enhancement and increase the index-number of subsequent entries. Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E)

17、2 ISO/IEC 2013 All rights reservedIn 1.5.1.1 Audio object type definition, amend Table 1.1 with the updates in the table below: Object TypeID Audio ObjectType gain control Remark 0 Null 43 SAOC 44 LD MPEG Surround 45 SAOC-DE 46 - 95 (reserved) After 1.5.1.2.39 add the following new subclauses: 1.5.1

18、.2.40 SAOC-DE object type The SAOC-DE object type conveys Spatial Audio Object Coding Dialogue Enhancement side information (see ISO/IEC 23003-2:2010/Amd.3) in the MPEG-4 Audio framework. In 1.5.2.1 (Profiles), Table 1.3 (Audio Profiles definition), add: Object Type ID Audio Object Type 43 SAOC 44 L

19、D MPEG Surround 45 SAOC-DE Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) ISO/IEC 2013 All rights reserved 3In 1.5.2.3 Levels within the profiles replace: Table 1.10 Levels for the AAC Profile Level Max. channels/object Max. sampling rate kHz Max. PCU Max. RCU

20、 1 2 24 3 5 2 2 48 6 5 3 NA NA NA NA 4 5 48 19 15 5 5 96 38 15 With: Table 1.10 Levels for the AAC Profile Level Max. channels/object Max. sampling rate kHz Max. PCU Max. RCU 1 2 24 3 5 2 2 48 6 5 3 NA NA NA NA 4 5 48 19 15 5 5 96 38 15 6 7 48 25 19 7 7 96 50 19 Replace: Table 1.11 Levels for the Hi

21、gh Efficiency AAC Profile Level Max. channels/object Max. AAC sampling rate, SBR not present kHz Max. AAC sampling rate, SBR present kHzMax. SBR sampling rate kHz (in/out) Max. PCU Max. RCU Max. PCU Low power SBR Max. RCU Low power SBR 1 NA NA NA NA NA NA NA NA 2 2 48 24 24/48 9 10 7 8 Amendment 4:2

22、015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) 4 ISO/IEC 2013 All rights reserved3 2 48 48 48/48 (Note 1) 15 10 12 8 4 5 48 24/48 (Note 2) 48/48 (Note 1) 25 28 20 23 5 5 96 48 48/96 49 28 39 23 Note 1: For level 3 and level 4 decoders, it is mandatory to operate the SBR to

23、ol in downsampled mode if the sampling rate of the AAC core is higher than 24kHz. Hence, if the SBR tool operates on a 48kHz AAC signal, the internal sampling rate of the SBR tool will be 96kHz, however, the output signal will be downsampled by the SBR tool to 48kHz. Note 2: For one or two channels

24、the maximum AAC sampling rate, with SBR present, is 48kHz. For more than two channels the maximum AAC sampling rate, with SBR present, is 24kHz. With: Table 1.11 Levels for the High Efficiency AAC Profile Level Max. channels/object Max. AAC sampling rate, SBR not present kHz Max. AAC sampling rate,

25、SBR present kHz Max. SBR sampling rate kHz (in/out) Max. PCU Max. RCU Max. PCU Low power SBR Max. RCU Low power SBR 1 NA NA NA NA NA NA NA NA 2 2 48 24 24/48 9 10 7 8 3 2 48 48 48/48 (Note 1) 15 10 12 8 4 5 48 24/48 (Note 2) 48/48 (Note 1) 25 28 20 23 5 5 96 48 48/96 49 28 39 23 6 7 48 24/48 (Note 2

26、) 48/48 (Note 1) 34 37 27 30 7 7 96 48 48/96 67 37 53 30 Note 1: For level 3, level 4 and level 6 decoders, it is mandatory to operate the SBR tool in downsampled mode if the sampling rate of the AAC core is higher than 24kHz. Hence, if the SBR tool operates on a 48kHz AAC signal, the internal sampl

27、ing rate of the SBR tool will be 96kHz, however, the output signal will be downsampled by the SBR tool to 48kHz. Note 2: For one or two channels the maximum AAC sampling rate, with SBR present, is 48kHz. For more than two channels the maximum AAC sampling rate, with SBR present, is 24kHz. Replace: T

28、able 1.12 Levels for the High Efficiency AAC v2 Profile Level (Note 1) Max. channels/object Max. AAC sampling rate, SBR not present kHz Max. AAC sampling rate, SBR present kHz Max. SBR sampling rate kHz (in/out) Max. PCU Max. RCU Max. PCU HQ / LP SBR (Note 5) Max. RCU HQ / LP SBR(Note 5) 1 NA NA NA

29、NA NA NA NA NA 2 2 48 24 24/48 9 10 9 10 3 2 48 24/48 (Note 3) 48/48 (Note 2) 15 10 15 10 4 5 48 24/48 (Note 4) 48/48 (Note 2) 25 28 20 23 5 5 96 48 48/96 49 28 39 23 Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) ISO/IEC 2013 All rights reserved 5Note 1: Leve

30、l 2,3, and 4 HE AAC v2 Profile decoders implements the baseline version of the parametric stereo tool. A level 5 decoder shall not be limited to the baseline version of the parametric stereo tool. Note 2: For level 3 and level 4 decoders, it is mandatory to operate the SBR tool in downsampled mode i

31、f the sampling rate of the AAC core is higher than 24kHz. Hence, if the SBR tool operates on a 48kHz AAC signal, the internal sampling rate of the SBR tool will be 96kHz, however, the output signal will be downsampled by the SBR tool to 48kHz. Note 3: If Parametric Stereo data is present the maximum

32、 AAC sampling rate is 24kHz, if Parametric Stereo data is not present the maximum AAC sampling rate is 48kHz. Note 4: For one or two channels the maximum AAC sampling rate, with SBR present, is 48kHz. For more than two channels the maximum AAC sampling rate, with SBR present, is 24kHz. Note 5: The P

33、CU/RCU number are given for a decoder operating the LP SBR tool whenever applicable. With: Table 1.12 Levels for the High Efficiency AAC v2 Profile Level (Note 1) Max. channels/object Max. AAC sampling rate, SBR not present kHz Max. AAC sampling rate, SBR present kHz Max. SBR sampling rate kHz (in/o

34、ut) Max. PCU Max. RCU Max. PCU HQ / LP SBR (Note 5) Max. RCU HQ / LP SBR(Note 5) 1 NA NA NA NA NA NA NA NA 2 2 48 24 24/48 9 10 9 10 3 2 48 24/48 (Note 3) 48/48 (Note 2) 15 10 15 10 4 5 48 24/48 (Note 4) 48/48 (Note 2) 25 28 20 23 5 5 96 48 48/96 49 28 39 23 6 7 48 24/48 (Note 4) 48/48 (Note 2) 34 3

35、7 27 30 7 7 96 48 48/96 67 37 53 30 Note 1: Level 2, 3, 4, 6 and 7 HE AAC v2 Profile decoders implement the baseline version of the parametric stereo tool. A level 5 decoder shall not be limited to the baseline version of the parametric stereo tool. Note 2: For level 3, level 4 and level 6 decoders,

36、 it is mandatory to operate the SBR tool in downsampled mode if the sampling rate of the AAC core is higher than 24kHz. Hence, if the SBR tool operates on a 48kHz AAC signal, the internal sampling rate of the SBR tool will be 96kHz, however, the output signal will be downsampled by the SBR tool to 4

37、8kHz. Note 3: If Parametric Stereo data is present the maximum AAC sampling rate is 24kHz, if Parametric Stereo data is not present the maximum AAC sampling rate is 48kHz. Note 4: For one or two channels the maximum AAC sampling rate, with SBR present, is 48kHz. For more than two channels the maximu

38、m AAC sampling rate, with SBR present, is 24kHz. Note 5: The PCU/RCU number are given for a decoder operating the LP SBR tool whenever applicable. Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) 6 ISO/IEC 2013 All rights reservedIn 1.5.2.4 audioProfileLevelIndi

39、cation Insert the following new entries into Table 1.14 “audioProfileLevelIndication values” and adapt the “reserved for ISO use” range accordingly: 0x50 AAC Profile L6 0x51 AAC Profile L7 0x52 HE-AAC Profile L6 0x53 HE-AAC Profile L7 0x54 HE-AACv2 Profile L6 0x55 HE-AACv2 Profile L7 0x56 Extended H

40、E-AAC Profile L6 0x57 Extended HE-AAC Profile L7 0x58 - 0x7F reserved for ISO use - In 1.5.2.3 after: “The NA (Not Applicable) levels are introduced to emphasize the hierarchical structure of the AAC Profile and the High Efficiency AAC Profile. Hence, a decoder supporting the High Efficiency AAC Pro

41、file at a given level can decode an AAC Profile stream of the same or a lower level. The NA levels are not indicated in the audioProfileLevelIndication table (Table 1.14). Add: NOTE: A Level 6 or 7 decoder is not required to decode a Level 5 stream.“ In 1.5.2.3 “1.5.2.3 Levels within the profiles“,i

42、n the AAC, HE-AAC and HE-AACv2 Profile definition after each occurrence of the sentence: “For the audio object type 2 (AAC LC), mono or stereo mixdown elements are not permitted.“ Add: “For Levels 1 to 5 the height extension element is not permitted.“ Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-

43、3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) ISO/IEC 2013 All rights reserved 7In 1.6.2.1 extend Table 1.15 “AudioSpecificConfig()”as follows: Table 1.15 Syntax of AudioSpecificConfig() Syntax No. of bits Mnemonic AudioSpecificConfig () saocPresentFlag = -1; ldmpsPresentFlag = -1; saocDePresentFlag = -1;

44、if ( audioObjectType = 5 | audioObjectType = 29 ) case 43: saocPresentFlag = 1; saocPayloadEmbedding; 1 uimsbf SaocSpecificConfig(); break; case 44: ldmpsPresentFlag = 1; ldsacPayloadEmbedding; 1 uimsbf LDSpatialSpecificConfig(); break; case 45: saocDePresentFlag = 1; saocDePayloadEmbedding; 1 uimsb

45、f SaocDeSpecificConfig(); break; default: /* reserved */ if (extensionIdentifier = -1 11 bslbf if ( extensionIdentifier = 0x7cb ) extensionIdentifier = -1; if ( audioObjectType != 43 1 uimsbf if ( saocPresentFlag = 1 ) saocPayloadEmbedding = 1; saocscLen; 8 uimsbf if ( saocscLen = 0xff ) saocscLenEx

46、t; 16 uimsbf saocscLen += saocscLenExt; SaocSpecificConfig(); Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) 8 ISO/IEC 2013 All rights reserved if (extensionIdentifier = -1 11 bslbf if ( extensionIdentifier = 0x7cc ) extensionIdentifier = -1; if ( audioObjectT

47、ype != 44 1 uimsbf if ( ldmpsPresentFlag = 1 ) ldsacPayloadEmbedding = 1; ldsscLen; 8 uimsbf if ( ldsscLen = 0xff ) ldsscLenExt; 16 uimsbf ldsscLen += ldsscLenExt; LDSpatialSpecificConfig(); if (extensionIdentifier = -1 11 bslbf if ( extensionIdentifier = 0x7cd ) extensionIdentifier = -1; if ( audio

48、ObjectType != 45 1 uimsbf if ( saocDePresentFlag = 1 ) saocDePayloadEmbedding = 1; saocDescLen; 8 uimsbf if ( saocDescLen = 0xff ) saocDescLenExt; 16 uimsbf saocDescLen += saocDescLenExt; SaocDeSpecificConfig(); After 1.6.2.1.19 add the new subclause as follows: 1.6.2.1.20 SaocDeSpecificConfig Defin

49、ed in ISO/IEC 23003-2:2010/Amd.3. In 1.6.2.2.1 extend Table 1.17 “Audio Object Types” as follows: Amendment 4:2015 (IDT) to CAN/CSA-ISO/IEC 14496-3:10ISO/IEC 14496-3:2009/Amd.4:2013(E) ISO/IEC 2013 All rights reserved 9Table 1.17 Audio Object Types Object Type ID Audio Object Type definition of elementary stream payloads and d