1、Information technology MPEG audio technologies Part 2: Spatial Audio Object Coding (SAOC) AMENDMENT 3: Dialogue enhancement Technologies de linformation Technologies audio MPEG Partie 2: Codage dobjet audio spatial (SAOC) AMENDEMENT 3: Rehaussement des dialogues INTERNATIONAL STANDARD ISO/IEC 23003-
2、2 First edition 2010-10-01 Reference number ISO/IEC 23003-2:2010/Amd.3:2015(E) AMENDMENT 3 2015-03-15 ISO/IEC 2015 ii ISO/IEC 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized
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4、fice 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 Published in Switzerland ISO/IEC 23003-2:2010/Amd.3:2015(E) ISO/IEC 23003-2:2010/Amd.3:2015(E) Foreword ISO (the International Organization for Standardization) and IEC (the In
5、ternational 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
6、 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 establishe
7、d 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 do
8、cument 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 of patent rights. ISO and IEC shall not be held responsible for identifying an
9、y or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of u
10、sers and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplemen
11、tary information. The committee responsible for this document is ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. ISO/IEC 2015 All rights reserved iii Information technology MPEG audio technologies Part 2: Spatial Audio Objec
12、t Coding (SAOC) AMENDMENT 3: Dialogue enhancement Add Clause 12, Spatial Audio Object Coding Dialogue Enhancement (SAOC-DE): 12 Spatial Audio Object Coding Dialogue Enhancement 12.1 Introduction This Clause specifies the SAOC Dialogue Enhancement (SAOC-DE) profile. The SAOC-DE decoder processing and
13、 bitstream syntax are defined according Clauses 1 to 9 with the following modifications. Basic structure of the SAOC transcoder/decoder Add in “Table 2 Operation modes of the SAOC” the following text: Table 2 Operation modes of the SAOC Output signal configura- tion # of output channels # of input c
14、hannels SAOC module mode SAOC module output MPS decoder required mono/stereo/binaural/ 3-channel configuration 1, 2 or 3 1, 2 or 3 Decoder PCM output No multi-channel configura- tion 2 1 or 2 Transcoder MPS bitstream, downmix signal Yes SAOC Profiles and Levels Add in “Table 4 SAOC Profiles and Leve
15、ls” the following text: Table 4 SAOC Profiles and Levels Profiles Baseline profile DE profile LD profile Levels 1 2 3 4 1 2 1 2 3 Hybrid QMF bank X X X X X X - - - LD-QMF bank - - - - - - X X X Max number of residual channels 0 2 4 4 0 3 - - - Max sampling rate kHz 48 48 48 96 48 48 48 48 48 Max num
16、ber of objects 8 16 32 32 6 6 8 32 32 Max number of downmix channels 2 2 2 2 3 3 1 2 2 Min number of required output channels*) 2 2 2 2 1 1 2 2 5 Use of decorrelator yes yes yes yes no no yes yes yes PCU HQ decoder 12.2 20.4 33.9 67.8 12.4 22.1 8.4 20.7 39.3*) PCU LP decoder 6.6 12.2 23.0 46.0 11.4
17、21.0 N/A N/A N/A ISO/IEC 23003-2:2010/Amd.3:2015(E) ISO 2015 All rights reserved 1 ISO/IEC 23003-2:2010/Amd.3:2015(E) Profiles Baseline profile DE profile LD profile PCU addition for transcoding 1.1 1.1 1.1 2.3 N/A N/A 0.7 1.1 N/A PCU reduction for integrated transcoding -6.8 -6.8 -6.8 -6.8 N/A N/A
18、-3.6 -6.5 N/A RCU HQ decoder 5.7 9.8 13.5 17.5 6.3 12.3 3.6 4.2 17.9*) RCU LP decoder 4.8 5.4 5.7 10.3 7.3 7.9 N/A N/A N/A RCU reduction for integrated transcoding -1.3 -1.3 -1.3 -1.3 N/A N/A -0.6 -1.3 N/A Add below “Table 4 SAOC Profiles and Levels” the following text: MPS transcoding support for b
19、aseline and LD profile if the number of output channels 2 Replace below “Table 4 SAOC Profiles and Levels” the following text: The SAOC decoder type is defined by the four conditions: Profile: baseline profile or LD profile by The SAOC decoder type is defined by the four conditions: Profile: baselin
20、e, LD or DE profile Replace in “5.5 SAOC Profiles and Levels”: For all profiles and levels the following features are supported: Decoding to mono/stereo/binaural output by For baseline and low-delay profiles: Decoding to mono/stereo/binaural output. Transcoding to 5.1 is supported For Dialogue enhan
21、cement profile: Decoding to mono/stereo/3-channel output. No transcoding to 5.1 is supported Multi-channel background object (MBO) processing, DCU processing, MCU processing, separation metadata and send effects interface are not supported Post-downmix gain processing (PDG) is supported only in comb
22、ination with post(processing) re- application processing step Insert effects interface is supported only if no modification range control (MRC) settings are transported in the bitstream 12.2 Terms and definitions Add in “4.4 Variables”: N FGO is the number of FGOs. D FGO is the downmix sub-matrix fo
23、r FGOs.Table 4 (continued) 2 ISO 2015 All rights reserved ISO/IEC 23003-2:2010/Amd.3:2015(E) D BGO is the downmix sub-matrix for BGOs. m BGO is the modification gain for BGOs. m FGO is the modification gain for FGOs. m G is the decoder limited modification gain. is the input modification gain. Add i
24、n “4.5 Abbreviated terms”: BGO Background Object FGO Foreground Object DE Dialogue Enhancement 12.3 Payloads for SAOC-DE The bitstream syntax of the SAOC-DE is not compatible with the Baseline and Low Delay profiles of SAOC. The following changes are applied for SAOC-DE profile in “6.1 Payloads for
25、SAOC”: Introduction of DE bitstream elements Replace in “Table 5 Syntax of SAOCSpecificConfig()”: Table 5 Syntax of SAOCSpecificConfig() Syntax No. of bits Mnemonic SAOCSpecificConfig() by Table 5 Syntax of SAOCDESpecificConfig() Syntax No. of bits Mnemonic SAOCDESpecificConfig() Replace in “Table 2
26、0 Syntax of SAOCFrame()”: Table 20 Syntax of SAOCFrame() Syntax No. of bits Mnemonic SAOCFrame() by Table 20 Syntax of SAOCDEFrame() Syntax No. of bits Mnemonic SAOCDEFrame() Replace in “Table 21 SAOCFramingInfo()”: ISO 2015 All rights reserved 3 ISO/IEC 23003-2:2010/Amd.3:2015(E) Table 21 Syntax of
27、 SAOCFramingInfo() Syntax No. of bits Mnemonic SAOCFramingInfo() by Table 21 Syntax of SAOCDEFramingInfo() Syntax No. of bits Mnemonic SAOCDEFramingInfo() Replace in “Table 20 Syntax of SAOCFrame()”: Table 20 Syntax of SAOCFrame() Syntax No. of bits Mnemonic SAOCFrame() SAOCFramingInfo(); by Table 2
28、0 Syntax of SAOCDEFrame() Syntax No. of bits Mnemonic SAOCDEFrame() SAOCDEFramingInfo(); Introduction of SAOC version bitstream element Add in “Table 5 Syntax of SAOCSpecificConfig()”: SAOCDESpecificConfig() bsVersion; 4 uimsbfif ( bsVersion = 0 ) bsSamplingFrequencyIndex; 4 uimsbf Add in “Table 5 S
29、yntax of SAOCSpecificConfig()”:SAOCExtensionConfig(); Add in “Table 20 Syntax of SAOCFrame()”: SAOCDEFrame() if ( bsVersion = 0 ) SAOCDEFramingInfo();4 ISO 2015 All rights reserved ISO/IEC 23003-2:2010/Amd.3:2015(E) Add in “Table 20 Syntax of SAOCFrame()”:SAOCExtensionFrame(); Disabling SAOC Low Del
30、ay mode signalization Remove from “Table 5 Syntax of SAOCSpecificConfig()”: bsLowDelayMode; 1 uimsbf Replace in “Table 5 Syntax of SAOCSpecificConfig()”:if ( bsLowDelayMode = 0 ) bsFrameLength; 7 uimsbf else bsFrameLength; 5 uimsbf by bsFrameLength; 7 uimsbf Replace in “Table 21 SAOCFramingInfo()”:I
31、f ( bsLowDelayMode = 0 ) bsNumParamSets; 3 uimsbf else bsNumParamSets; 1 uimsbf by bsNumParamSets; 3 uimsbf Disabling absolute energy information transport Remove from “Table 5 Syntax of SAOCSpecificConfig()”: bsTransmitAbsNrg; 1 uimsbf ISO 2015 All rights reserved 5 ISO/IEC 23003-2:2010/Amd.3:2015(
32、E) Remove from “Table 20 Syntax of SAOCFrame()”:if ( bsTransmitAbsNrg ) idxNRG = EcDataSaoc(NRG, 0, numBands); Modification on object information transport Replace in “Table 5 Syntax of SAOCSpecificConfig()”: bsNumObjects; 5 uimsbf by bsNumObjects; 3 uimsbf bsNumFGOs; 3 uimsbf Modification on downmi
33、x channel number signalization Replace in “Table 5 Syntax of SAOCSpecificConfig()”: bsNumDmxChannels; 1 uimsbf by bsNumDmxChannels; 3 uimsbf Dual mode configuration information transport Remove from “Table 5 Syntax of SAOCSpecificConfig()”:if ( bsNumDmxChannels = 1 ) bsTttDualMode; 1 uimsbfif (bsTtt
34、DualMode) bsTttBandsLow; 5 uimsbfbsTttBandsHigh = numBands; Note 1 else bsTttBandsLow = numBands;6 ISO 2015 All rights reserved ISO/IEC 23003-2:2010/Amd.3:2015(E) Disabling post downmix gain information transport Remove from “Table 5 Syntax of SAOCSpecificConfig()”: bsPdgFlag; 1 uimsbf Remove from “
35、Table 20 Syntax of SAOCFrame()”:if ( bsPdgFlag = 1 ) for (i=0; ibsNumDmxChannels + 1; i+) idxPDGi = EcDataSaoc(PDG, i, numBands); Note 1 Modification on downmix information transport Replace in “Table 20 Syntax of SAOCFrame()”:idxDMG = EcDataSaoc(DMG, 0, bsNumObjects+1);if ( bsNumDmxChannels = 1 ) i
36、dxDCLD = EcDataSaoc(DCLD, 0, bsNumObjects+1); byfor (i=0; ibsNumDmxChannels + 1; i+) idxDMGi = EcDataSaoc(DMG, 0, bsNumObjects+1); Modification range control setting transport Add in “Table 5 Syntax of SAOCSpecificConfig()” the following text: bsOneIOC; 1 uimsbf bsDeLimitFlag; 1 uimsbfif ( bsDeLimit
37、Flag = 1 ) bsDeLimitFgo; 4 uimsbf bsDeLimitBgo; 4 uimsbf else bsDeLimitFgo = 0;bsDeLimitBgo = 0; ISO 2015 All rights reserved 7 ISO/IEC 23003-2:2010/Amd.3:2015(E) Add in “Table 20 Syntax of SAOCFrame()” the following text:idxDMGi = EcDataSaoc(DMG, 0, bsNumObjects+1);if ( bsDeLimitFlag = 1 ) if ( bsI
38、ndependencyFlag = 1 ) bsDeLimitUpdate = 1; else sDeLimitUpdate; 1 uimsbfif ( bsDeLimitUpdate = 1 ) bsDeLimitFgo; 4 uimsbf bsDeLimitBgo; 4 uimsbf Add in “Table 7 Syntax of SAOCExtensionConfigData(0)”: SAOCExtensionConfigData(0) if ( bsDeLimitFlag = 1 ) bsDeLimitFgoEAO; 4 uimsbf bsDeLimitBgoEAO; 4 uim
39、sbf else bsDeLimitFgoEAO = 0;bsDeLimitBgoEAO = 0; Add in “Table 28 Syntax of SAOCExtensionFrameData(0)”: SAOCExtensionFrameData(0) if ( bsDeLimitFlag = 1 ) if ( bsIndependencyFlag = 1 ) bsDeLimitEaoUpdate = 1; else bsDeLimitEaoUpdate; 1 uimsbfif ( bsDeLimitEaoUpdate = 1 ) bsDeLimitFgoEAO; 4 uimsbf b
40、sDeLimitBgoEAO; 4 uimsbf8 ISO 2015 All rights reserved ISO/IEC 23003-2:2010/Amd.3:2015(E) 12.4 Definition of bitstream variables Add in “6.2 Definition” the following text: bsVersion Defines the version of the bitstream according to Table AMD3.1. Table AMD3.1 bsVersion bsVersion Meaning 0 SAOC DE pr
41、ofile, levels 1 and 2 1 15 Reserved Add in “6.2 Definition” the following text: bsNumFGOs Defines the number of FGOs according to Table AMD3.2. Table AMD3.2 bsNumFGOs bsNumFGOs Meaning 0 = 1 1 = 2 2 = 3 3,7 N/A bsNumDmxChannels Defines the number of downmix channels. Table AMD3.3 bsNumDmxChannels bs
42、NumDmxChannels Meaning 0 mono downmix 1 stereo downmix 2 3-channel downmix 3,7 N/A bsDeLimitFlag Defines whether the values bsDeLimitFgo, bsDeLimitFgoEAO, bsDe- LimitBgo and bsDeLimitBgoEAO are transmitted in the bitstream. bsDeLimitUpdate Defines whether the values bsDeLimitFgo, bsDeLimitFgoEAO, bs
43、DeLimitBgo and bsDeLimitBgoEAO are updated. More precisely, bsDeLimitUpdate = 1 means that the values bsDeLimitFgo, bsDe- LimitFgoEAO, bsDeLimitBgo and bsDeLimitBgoEAO are updated in the current frame, whereas bsDeLimitUpdate = 0 means that the previously transmitted values are kept. bsDeLimitFgo De
44、fines the value representing the lowest acceptable modification boundary related to the FGO for the modification range control algo- rithm according to Table AMD3.4. ISO 2015 All rights reserved 9 ISO/IEC 23003-2:2010/Amd.3:2015(E) Table AMD3.4 bsDeLimitFgo, bsDeLimitFgoEAO, bsDeLimitBgo and bsDeLim
45、itBgoEAO parameters quantization table idx 0 1 2 3 4 5 6 7 DeLimitidx 10 -7.50 10 -2.25 10 -2.00 10 -1.75 10 -1.50 10 -1.25 10 -1.10 10 -0.95 idx 8 9 10 11 12 13 14 15 DeLimitidx 10 -0.80 10 -0.65 10 -0.50 10 -0.40 10 -0.30 10 -0.20 10 -0.10 1 bsDeLimitFgoEAO Same as bsDeLimitFgo but for application
46、 only in strict EAO mode. bsDeLimitBgo Defines the value representing the lowest acceptable modification boundary related to the BGO for the modification range control algo- rithm according to Table X. bsDeLimitBgoEAO Same as bsDeLimitBgo but for application only in strict EAO mode. bsDeLimitUpdate
47、Defines whether the values bsDeLimitFgo and bsDeLimitBgo are updated. More precisely, bsDeLimitUpdate = 1 means that the values bsDeLimitFgo and bsDeLimitBgo are updated in the current frame, whereas bsDeLimitUpdate = 0 means that the previously transmitted values are kept. bsDeLimitEaoUpdate Define
48、s whether the values bsDeLimitFgoEAO and bsDeLimitB- goEAO are updated. More precisely, bsDeLimitEaoUpdate = 1 means that the values bsDeLimitFgoEAO and bsDeLimitBgoEAO are updated in the current frame, whereas bsDeLimitEaoUpdate = 0 means that the previously transmitted values are kept. Add in “6.2 Definition” the following text: Table AMD3.5 bsPresetMatrixType bsPresetMatrixType Meaning 0 Mono playback system 1 Stereo playback system 2 5.0 playback system 3 3.0 playback system 12.5 Signals and parameters Input
