ISO/IEC 23008-3:2019

Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio

This document specifies technology that supports the efficient transmission of immersive audio signals and flexible rendering for the playback of immersive audio in a wide variety of listening scenarios. These include home theatre setups with 3D loudspeaker configurations, 22.2 loudspeaker systems, automotive entertainment systems and playback over headphones connected to a tablet or smartphone.

Technologies de l'information — Codage à haute efficacité et livraison des medias dans des environnements hétérogènes — Partie 3: Audio 3D

General Information

• Status: Withdrawn
• Publication Date: 27-Feb-2019
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Current Stage: 9092 - International Standard to be revised
• Completion Date: 30-Jul-2021

Relations

• Amended By: ISO/IEC 23008-3:2019/Amd 1:2019 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 1: Audio metadata enhancements
• Effective Date: 25-Apr-2020
• Amended By: ISO/IEC 23008-3:2019/Amd 2:2020 - 3D Audio baseline profile, corrections and improvements
• Effective Date: 25-Dec-2021
• Revised: ISO/IEC 23008-3:2022 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio
• Effective Date: 28-Aug-2021
• Revises: ISO/IEC 23008-3:2015/Amd 1:2016 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 1: MPEG-H, 3D audio profile and levels
• Effective Date: 02-Sep-2017
• Revises: ISO/IEC 23008-3:2015/Amd 2:2016 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 2: MPEG-H 3D Audio File Format Support
• Effective Date: 02-Sep-2017
• Revises: ISO/IEC 23008-3:2015/Amd 4:2016 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 4: Carriage of system data
• Effective Date: 02-Sep-2017
• Revises: ISO/IEC 23008-3:2015 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio
• Effective Date: 02-Sep-2017
• Revises: ISO/IEC 23008-3:2015/Amd 3:2017 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 3: MPEG-H 3D Audio Phase 2
• Effective Date: 02-Sep-2017

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 23008-3
Second edition
2019-02
Information technology — High
efficiency coding and media delivery
in heterogeneous environments —
Part 3:
3D audio
Technologies de l'information — Codage à haute efficacité et livraison
des medias dans des environnements hétérogènes —
Partie 3: Audio 3D
Reference number
ISO/IEC 23008-3:2019(E)
©
ISO/IEC 2019

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ISO/IEC 23008-3:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2019
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Published in Switzerland
ii © ISO/IEC 2019 – All rights reserved

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ISO/IEC 23008-3:2019(E)
Contents Page
Foreword . x
Introduction . xii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols, abbreviations and mnemonics . 2
3.1 Terms, definitions, symbols and abbreviated terms . 2
3.2 Mnemonics . 2
4 Technical overview . 2
4.1 Decoder block diagram . 2
4.2 Overview over the codec building blocks . 3
4.3 Efficient combination of decoder processing blocks in the time domain and QMF domain . 6
4.4 Rule set for determining processing domains . 9
4.4.1 Audio core codec processing domain . 9
4.4.2 Mixing . 9
4.4.3 DRC-1 Operation domains (DRC in rendering context) . 10
4.4.4 Audio core codec interface domain to rendering . 10
4.4.5 Rendering context . 10
4.4.6 Post-processing context . 10
4.4.7 End-of-chain context . 11
4.5 Sample rate converter . 11
4.6 Decoder delay . 11
4.7 Contribution mode of MPEG-H 3D audio . 12
4.8 MPEG-H 3D audio profiles and levels . 12
4.8.1 General . 12
4.8.2 Profiles . 12
5 MPEG-H 3D audio core decoder . 22
5.1 Definitions . 22
5.1.1 Joint stereo . 22
5.1.2 MPEG surround based stereo (MPS 212) . 22
5.2 Syntax . 22
5.2.1 General . 22
5.2.2 Decoder configuration . 23
5.2.3 MPEG-H 3D audio core bitstream payloads . 41
5.3 Data structure . 60
5.3.1 General . 60
5.3.2 General configuration data elements . 61
5.3.3 Loudspeaker configuration data elements . 63
5.3.4 Core decoder configuration data elements . 65
5.3.5 Downmix matrix data elements . 69
5.3.6 HOA rendering matrix data elements . 72
5.3.7 Signal group information elements . 74
5.3.8 Low frequency enhancement (LFE) channel element, mpegh3daLfeElement() . 75
5.4 Configuration element descriptions . 75
5.4.1 General . 75
5.4.2 Downmix configuration . 76
5.4.3 HOA rendering matrix configuration . 81
5.5 Tool descriptions . 86
5.5.1 General . 86
5.5.2 Quad channel element . 86
5.5.3 Transform splitting . 88
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ISO/IEC 23008-3:2019(E)
5.5.4 MPEG surround for mono to stereo upmixing . 95
5.5.5 Enhanced noise filling . 97
5.5.6 Audio pre-roll . 121
5.5.7 Fullband LPD . 124
5.5.8 Time-domain bandwidth extension. 135
5.5.9 LPD stereo coding . 148
5.5.10 Multichannel coding tool . 155
5.5.11 Filterbank and block switching . 166
5.5.12 Frequency domain prediction . 166
5.5.13 Long-term postfilter . 169
5.5.14 Tonal component coding . 175
5.5.15 Internal channel on MPS212 for low complexity format conversion . 184
5.5.16 High resolution envelope processing (HREP) tool . 196
5.6 Buffer requirements . 202
5.6.1 Minimum decoder input buffer . 202
5.6.2 Bit reservoir . 203
5.6.3 Maximum bit rate . 203
5.7 Stream access point requirements and inter-frame dependency . 203
6 Dynamic range control and loudness processing . 205
6.1 General . 205
6.2 Description . 205
6.3 Syntax . 205
6.3.1 Loudness metadata . 205
6.3.2 Dynamic range control metadata. 205
6.3.3 Data elements . 206
6.4 Decoding process . 207
6.4.1 General . 207
6.4.2 Dynamic range control . 209
6.4.3 Usage of downmixId in MPEG-H . 209
6.4.4 DRC set selection process . 210
6.4.5 DRC-1 for SAOC 3D Content . 212
6.4.6 DRC-1 for HOA content . 212
6.4.7 Loudness normalization . 214
6.4.8 Peak limiter . 214
6.4.9 Time-synchronization of DRC gains . 214
6.4.10 Default parameters . 214
7 Object metadata decoding . 215
7.1 General . 215
7.2 Description . 215
7.3 Syntax . 216
7.3.1 Object metadata configuration . 216
7.3.2 Top level object metadata syntax . 217
7.3.3 Subsidiary payloads for efficient object metadata decoding . 218
7.3.4 Subsidiary payloads for object metadata decoding with low delay . 222
7.3.5 Enhanced object metadata configuration . 227
7.4 Data structure . 230
7.4.1 Definition of ObjectMetadataConfig() payloads . 230
7.4.2 Efficient object metadata decoding . 230
7.4.3 Object metadata decoding with low delay . 239
7.4.4 Enhanced object metadata . 244
8 Object rendering . 247
8.1 Description . 247
8.2 Terms and definitions . 247
8.3 Input data . 248
8.4 Processing . 249
8.4.1 General remark . 249
8.4.2 Imaginary loudspeakers . 249
8.4.3 Dividing the loudspeaker setup into a triangle mesh . 250
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ISO/IEC 23008-3:2019(E)
8.4.4 Rendering algorithm . 252
9 SAOC 3D . 256
9.1 Description . 256
9.2 Definitions . 256
9.3 Delay and synchronization . 258
9.4 Syntax . 258
9.4.1 Payloads for SAOC 3D . 258
9.4.2 Definition of SAOC 3D payloads . 262
9.5 SAOC 3D processing . 264
9.5.1 Compressed data stream decoding and dequantization of SAOC 3D data . 264
9.5.2 Time/frequency transforms . 264
9.5.3 Signals and parameters . 264
9.5.4 SAOC 3D decoding . 266
9.5.5 Dual mode . 271
10 Generic loudspeaker rendering/format conversion . 272
10.1 Description . 272
10.2 Definitions . 273
10.2.1 General remarks . 273
10.2.2 Variable definitions . 273
10.3 Processing . 274
10.3.1 Application of transmitted downmix matrices . 274
10.3.2 Application of transmitted equalizer settings . 278
10.3.3 Downmix processing involving multiple channel groups . 278
10.3.4 Initialization of the format converter. 279
10.3.5 Audio signal processing . 294
11 Immersive loudspeaker rendering/format conversion . 299
11.1 Description . 299
11.2 Syntax . 301
11.3 Definitions . 301
11.3.1 General remarks . 301
11.3.2 Variable definitions . 302
11.4 Processing . 303
11.4.1 Initialization of the format converter. 303
11.4.2 Audio signal processing . 343
12 Higher order ambisonics (HOA) . 350
12.1 Technical overview . 350
12.1.1 Block diagram . 350
12.1.2 Overview of the decoder tools . 351
12.2 Syntax . 353
12.2.1 Configuration of HOA elements . 353
12.2.2 Payloads of HOA elements . 356
12.3 Data structure . 368
12.3.1 Definitions of HOA Config . 368
12.3.2 Syntax of getSubbandBandwidths() . 373
12.3.3 Definitions of HOA payload . 373
12.4 HOA tool description . 381
12.4.1 HOA frame converter . 381
12.4.2 Spatial HOA decoding . 398
12.4.3 HOA renderer . 428
12.4.4 Layered coding for HOA . 436
13 Binaural renderer . 439
13.1 General . 439
13.2 Frequency-domain binaural renderer . 439
13.2.1 General . 439
13.2.2 Definitions . 441
13.2.3 Parameterization of binaural room impulse responses . 445
13.2.4 Frequency-domain binaural processing . 457
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ISO/IEC 23008-3:2019(E)
13.3 Time-domain binaural renderer . 464
13.3.1 General . 464
13.3.2 Definitions . 465
13.3.3 Parameterization of binaural room impulse responses . 467
13.3.4 Time-domain binaural processing . 471
14 MPEG-H 3D audio stream (MHAS) . 472
14.1 Overview . 472
14.2 Syntax . 472
14.2.1 Main MHAS syntax elements . 472
14.2.2 Subsidiary MHAS syntax elements . 474
14.3 Semantics . 475
14.3.1 mpeghAudioStreamPacket() . 475
14.3.2 MHASPacketPayload() . 475
14.3.3 Subsidiary MHAS packets . 477
14.4 Description of MHASPacketTypes . 477
14.4.1 PACTYP_FILLDATA . 477
14.4.2 PACTYP_MPEGH3DACFG. 477
14.4.3 PACTYP_MPEGH3DAFRAME . 477
14.4.4 PACTYP_SYNC . 478
14.4.5 PACTYP_SYNCGAP . 478
14.4.6 PACTYP_MARKER . 478
14.4.7 PACTYP_CRC16 and PACTYP_CRC32 . 479
14.4.8 PACTYP_DESCRIPTOR .
...