Reference numbe
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ISO/IEC 13818-7:2004(E)
©
ISO/IEC 2004
INTERNATIONAL
STANDARD
ISO/IEC
13818-7
Third edition
2004-10-15
Information technology — Generic
coding of moving pictures and
associated audio information —
Part 7:
Advanced Audio Coding (AAC)
Technologies de l’information — Codage générique des images
animées et du son associé —
Partie 7: Codage du son avancé (AAC)
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ISO/IEC 13818-7:2004(E)
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© ISO/IEC 2004 – All rights reserved
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ISO/IEC 13818-7:2004(E)
© ISO/IEC 2004 – All rights reserved iii
Contents Page
1 Scope...................................................................................................................................................... 1
1.1 MPEG-2 AAC Tools Overview ................................................................................................................ 1
2 Normative References .......................................................................................................................... 8
3 Terms and Definitions .......................................................................................................................... 8
4 Symbols and Abbreviations............................................................................................................... 15
4.1 Arithmetic Operators ............................................................................................................................. 15
4.2 Logical Operators.................................................................................................................................. 16
4.3 Relational Operators ............................................................................................................................. 16
4.4 Bitwise Operators.................................................................................................................................. 17
4.5 Assignment ........................................................................................................................................... 17
4.6 Mnemonics............................................................................................................................................ 17
4.7 Constants .............................................................................................................................................. 17
5 Method of Describing Bitstream Syntax...........................................................................................17
6 Syntax................................................................................................................................................... 19
6.1 Audio Data Interchange Format, ADIF.................................................................................................. 19
6.2 Audio Data Transport Stream, ADTS.................................................................................................... 20
6.3 Raw Data .............................................................................................................................................. 22
7 Profiles and Profile Interoperability .................................................................................................. 34
7.1 Profiles .................................................................................................................................................. 34
7.2 Profile Interoperability ........................................................................................................................... 36
8 General Information ............................................................................................................................ 37
8.1 Audio Data Interchange Format (ADIF) and Audio Data Transport Stream (ADTS)............................ 37
8.2 Decoding of Raw Data .......................................................................................................................... 42
8.3 Decoding of a single_channel_element() (SCE), a channel_pair_element() (CPE) or an
individual_channel_stream() (ICS)........................................................................................................ 47
8.4 Low Frequency Enhancement Channel (LFE)...................................................................................... 54
8.5 program_config_element() (PCE) ......................................................................................................... 55
8.6 Data Stream Element (DSE) ................................................................................................................. 59
8.7 Fill Element (FIL)................................................................................................................................... 60
8.8 Dedoding of extension_payload() ......................................................................................................... 60
8.9 Tables.................................................................................................................................................... 66
8.10 Figures .................................................................................................................................................. 74
9 Noiseless Coding ................................................................................................................................ 74
9.1 Tool Description .................................................................................................................................... 74
9.2 Definitions ............................................................................................................................................. 75
9.3 Decoding Process ................................................................................................................................. 77
9.4 Tables.................................................................................................................................................... 80
10 Quantization ........................................................................................................................................ 81
10.1 Tool Description .................................................................................................................................... 81
10.2 Definitions ............................................................................................................................................. 81
10.3 Decoding Process ................................................................................................................................. 81
11 Scalefactors......................................................................................................................................... 82
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ISO/IEC 13818-7:2004(E)
iv
© ISO/IEC 2004 – All rights reserved
11.1
Tool Description ....................................................................................................................................82
11.2 Definitions..............................................................................................................................................82
11.3 Decoding Process .................................................................................................................................83
12 Joint Coding.........................................................................................................................................84
12.1 M/S Stereo.............................................................................................................................................84
12.2 Intensity Stereo .....................................................................................................................................86
12.3 Coupling Channel..................................................................................................................................88
13 Prediction .............................................................................................................................................92
13.1 Tool Description ....................................................................................................................................92
13.2 Definitions..............................................................................................................................................92
13.3 Decoding Process .................................................................................................................................93
13.4 Diagrams .............................................................................................................................................100
14 Temporal Noise Shaping (TNS)........................................................................................................100
14.1 Tool Description ..................................................................................................................................100
14.2 Definitions............................................................................................................................................101
14.3 Decoding Process ...............................................................................................................................101
15 Filterbank and Block Switching .......................................................................................................103
15.1 Tool Description ..................................................................................................................................103
15.2 Definitions............................................................................................................................................103
15.3 Decoding Process ...............................................................................................................................104
16 Gain Control.......................................................................................................................................108
16.1 Tool Description ..................................................................................................................................108
16.2 Definitions............................................................................................................................................109
16.3 Decoding Process ...............................................................................................................................109
16.4 Diagrams .............................................................................................................................................115
16.5 Tables..................................................................................................................................................115
Annex A (normative) Huffman Codebook Tables...................................................................................117
Annex B (informative) Information on Unused Codebooks ..................................................................138
Annex C (informative) Encoder ................................................................................................................139
C.1 Psychoacoustic Model.........................................................................................................................139
C.2 Gain Control ........................................................................................................................................171
C.3 Filterbank and Block Switching ...........................................................................................................172
C.4 Prediction.............................................................................................................................................175
C.5 Temporal Noise Shaping (TNS) ..........................................................................................................178
C.6 Joint Coding.........................................................................................................................................179
C.7 Quantization ........................................................................................................................................181
C.8 Noiseless Coding ................................................................................................................................188
C.9 Features of AAC dynamic range control .............................................................................................191
Annex D (informative) Patent Holders .....................................................................................................193
D.1 List of Patent Holders ..........................................................................................................................193
Annex E (informative) Registration Procedure.......................................................................................194
E.1 Procedure for the Request of a Registered Identifier (RID) ................................................................194
E.2 Responsibilities of the Registration Authority......................................................................................194
E.3 Contact Information of the Registration Authority ...............................................................................194
E.4 Responsibilities of Parties Requesting a RID......................................................................................195
E.5 Appeal procedure for Denied Applications..........................................................................................195
Annex F (informative) Registration Application Form ...........................................................................196
Annex G (informative) Registration Authority.........................................................................................197
Bibliography....................................................................................................................................................198
Copyright International Organization for Standardization
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ISO/IEC 13818-7:2004(E)
© ISO/IEC 2004 – All rights reserved v
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
ISO/IEC 13818-7 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
This third edition cancels and replaces the second edition (ISO/IEC 13818-7:2003), which has been
technically revised. It also incorporates the Amendment ISO/IEC 13818-7:2003/Amd.1:2004.
ISO/IEC 13818 consists of the following parts, under the general title Information technology — Generic
coding of moving pictures and associated audio information:
— Part 1: Systems
— Part 2: Video
— Part 3: Audio
— Part 4: Conformance testing
— Part 5: Software simulation
— Part 6: Extensions for DSM-CC
— Part 7: Advanced Audio Coding (AAC)
— Part 9: Extension for real time interface for systems decoders
— Part 10: Conformance extensions for Digital Storage Media Command and Control (DSM-CC)
— Part 11: IPMP on MPEG-2 systems
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