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any relevant patent rights of which they are aware and to provide supporting documentation. documentation. supporting provide to and aware are they which of rights patent relevant any
invited to submit, with their comments, notification of of notification comments, their with submit, to invited are document this of Recipients edition. latest the obtain
subject to periodic review and users are cautioned to to cautioned are users and review periodic to subject is document This document. standards the adopting parties www.aes.org/standards
Approval does not assume any liability to any patent owner, nor does it assume any obligation whatever to to whatever obligation any assume it does nor owner, patent any to liability any assume not does Approval
ld responsible for identifying any or all such patents. patents. such all or any identifying for responsible ld he be not shall AES rights. patent of subject the be may
Attention is drawn to the possibility that some of the elements of this AES standard or information document document information or standard AES this of elements the of some that possibility the to drawn is Attention
d opportunities to comment or object to any provision. provision. any to object or comment to opportunities d provide were parties all approval, to Prior standard.
manufacturing, marketing, purchasing, or using products, processes, or procedures not in agreement with the the with agreement in not procedures or processes, products, using or purchasing, marketing, manufacturing,
her or not he or she has approved the document, from from document, the approved has she or he not or her whet anyone, preclude respect any in not does standard
is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an AES AES an of existence The public. general the and consumer, the manufacturer, the aid to guide a as intended is
and materially affected by its scope and provisions and and provisions and scope its by affected materially and directly those of consensus a implies standard AES An
data. audio PCM the of bits least-significant the into embedded is
where the downmix channels remain in the linear PCM domain and the MPEG Surround or MPEG SAOC data data SAOC MPEG or Surround MPEG the and domain PCM linear the in remain channels downmix the where
This standard specifies how MPEG Surround or MPEG MPEG or Surround MPEG how specifies standard This SAOC shall be carried within an AES3 bitstream bitstream AES3 an within carried be shall SAOC
same method to convey the related side information over PCM. PCM. over information side related the convey to method same
udio Object Coding) that uses the the uses that Coding) Object udio A (Spatial SAOC MPEG include to d revise been has MPEG-D recently, More rve only Preview
systems is achieved. achieved. is systems
the downmix to result in a multi-channel audio signal. In signal. audio multi-channel a in result to downmix the tibility to mono and stereo stereo and mono to tibility compa backward way this
side information (MPEG Surround data). An MPEG Surround decoder is able to combine this information with with information this combine to able is decoder Surround MPEG An data). Surround (MPEG information side
addition the MPEG Surround encoder generates spatial spatial generates encoder Surround MPEG the addition In encoder. Surround MPEG the by generated is that
iginal multi-channel audio audio multi-channel iginal or the of downmix a present re channels audio stereo or mono The channels. multiple
MPEG-D is an ISO/IEC standard describing MPEG Surround that extends mono or stereo audio towards towards audio stereo or mono extends that Surround MPEG describing standard ISO/IEC an is MPEG-D
Abstract Abstract
he Audio Engineering Society Engineering Audio he t by 2017 2012, 2007, © Copyright
Audio Engineering Society, Inc. Inc. Society, Engineering Audio
Published by by Published
in an AES3 bitstream bitstream AES3 an in
Carriage of MPEG Surround Surround MPEG of Carriage
digital audio engineering - - engineering audio digital
AES standard for for standard AES
(reaffirmed 2017) 2017) (reaffirmed
Revision of AES55-2007 AES55-2007 of Revision AES55-2012 AES55-2012
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igah ...... liography Bib B Annex ...... 9
dndt ...... data dden hi of on indicati No A.2.4 .....8
A.2.3 Positive indication of hidden data, default audio audio default data, hidden of indication Positive A.2.3 ength...... 8 l word
rd length...... 7 rd wo audio and data hidden of indication Positive A.2.2
...... 7 eneral G A.2.1
ection...... 7 det SAOC PEG M and Surround MPEG A.2
s...... 7 es fram data buried- SAOC MPEG and Surround MPEG of Format A.1
PCM...... 7 over Surround MPEG (normative) A Annex
ation...... inform dden hi Indicating 4.3 ...... 6
nt ...... ength l word audio Defining 4.2 ...... 6
a...... 6 dat ied bur Embedding 4.1
tstream...... bi AES3 an in Surround MPEG 4 .6
iations...... Abbrev 3 ...... 5
nces...... refere Normative 2 ...... 4
cp ...... Scope 1 ...... 4
tion...... Introduc ...... 4
Contents Contents
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permission use the verb “may”. Sentences expressing a possibility use the verb “can”. “can”. verb the use possibility a expressing Sentences “may”. verb the use permission
strong suggestions (recommendations). Sentences giving giving Sentences (recommendations). suggestions strong are “should” verb the containing Sentences document.
In AES standards documents, sentences containing the word “shall” are requirements for compliance with the the with compliance for requirements are “shall” word the containing sentences documents, standards AES In www.aes.org/standards
Note on normative language language normative on Note
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Chair, working group SC-02-02 SC-02-02 group working Chair,
J. Grant Grant J.
principally contributed by A. Borsum. Borsum. A. by contributed principally
This revision extends the previous edition to include MPEG Spatial Audio Object Coding (SAOC), and was was and (SAOC), Coding Object Audio Spatial MPEG include to edition previous the extends revision This
Foreword to 2012 revision revision 2012 to Foreword
Chair, working group SC-02-02 SC-02-02 group working Chair,
J. Grant Grant J.
J. Woodgate, M. Yonge. Yonge. M. Woodgate, J.
document in draft are: R. Caine, C. Cellier, J. Grant, J. Herre, K. Kjörling, W. Oomen, E. Schuijers, Schuijers, E. Oomen, W. Kjörling, K. Herre, J. Grant, J. Cellier, C. Caine, R. are: draft in document
ect AES-X159. The members of th of members The AES-X159. ect proj under developed was document This e writing group that developed this this developed that group writing e
an AES3 bitstream AES3 an , AES55-2007. AES55-2007. ,
This foreword is not part of the the of part not is foreword This AES standard for digital audio engineering - Carriage of MPEG Surround in in Surround MPEG of Carriage - engineering audio digital for standard AES
Foreword Foreword
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New York, US. www.aes.org www.aes.org US. York, New Society, Engineering Audio , data audio digital represented linearly channel two
AES standard for digital audio – Digital input-output interfacing – Serial transmission format for for format transmission Serial – interfacing input-output Digital – audio digital for standard AES , AES3-2009
www.aes.org/standards
Commission, Geneva, Switzerland. www.iec.ch www.iec.ch Switzerland. Geneva, Commission,
, International Electrotechnical Electrotechnical International , General 1: Part – Interface audio Digital 2008 Ed.3.0: 60958-1 IEC
(including any amendments) applies. applies. amendments) any (including
rences, the latest edition of the referenced document document referenced the of edition latest the rences, refe undated For applies. cited edition the only references,
are indispensable for the application of this document. For dated dated For document. this of application the for indispensable are documents referenced following The
2 Normative references references Normative 2
Surround or MPEG SAOC. SAOC. MPEG or Surround
transport. The standard does not consider compression or processing algorithms associated with MPEG MPEG with associated algorithms processing or compression consider not does standard The transport.
AES3-compliant transport. The transport method is intended to be compatible with IEC 60958-compliant 60958-compliant IEC with compatible be to intended is method transport The transport. AES3-compliant
This standard specifies a means of transport of an MPEG Surround and MPEG SAOC bitstreams over an an over bitstreams SAOC MPEG and Surround MPEG an of transport of means a specifies standard This
1 Scope Scope 1
by employing subtractive dithered noise-shaping controlled by the masked threshold. threshold. masked the by controlled noise-shaping dithered subtractive employing by
rsion of the embedded data, can be rendered inaudible inaudible rendered be can data, embedded the of rsion ve randomized a is actually which signal, noise-like This
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esence of data hidden in the PCM samples using the channel status. status. channel the using samples PCM the in hidden data of esence pr the signal to mechanism a for except
bits of the PCM data. By embedding buried data into the PCM samples, the AES3 format itself is not affected, affected, not is itself format AES3 the samples, PCM the into data buried embedding By data. PCM the of bits
tics to the less-significant less-significant the to tics characteris specific with gnal si noise-like a adding by channels audio PCM traditional
used to carry one linear PCM sample. MPEG Surround or Surround MPEG sample. PCM linear one carry to used SAOC data can be conveyed as buried data over over data buried as conveyed be can data SAOC
of AES3 subframes. Each AES3 subframe is normally normally is subframe AES3 Each subframes. AES3 of sequence a of consists interface AES3 the of format The
mono or stereo systems. systems. stereo or mono to compatibility backward
ios. As for MPEG Surround, MPEG SAOC provides provides SAOC MPEG Surround, MPEG for As ios. scenar reproduction different for decoder SAOC MPEG
conveyed alongside a compatible mix-down of the incoming audio objects which can be rendered by an an by rendered be can which objects audio incoming the of mix-down compatible a alongside conveyed
render multiple audio objects for playback with various kinds of channel configurations. Side information is is information Side configurations. channel of kinds various with playback for objects audio multiple render
MPEG Spatial Audio Object Coding (SAOC) is an ISO/IEC standard to encode, transmit, and interactively interactively and transmit, encode, to standard ISO/IEC an is (SAOC) Coding Object Audio Spatial MPEG
achieved. achieved.
mpatibility to conventional mono and stereo systems is is systems stereo and mono conventional to mpatibility co backward way this In signal. audio multi-channel a
Surround data). An MPEG Surround decoder is able to combine this information with the downmix to result in in result to downmix the with information this combine to able is decoder Surround MPEG An data). Surround
MPEG Surround encoder. In addition the MPEG Surround Surround MPEG the addition In encoder. Surround MPEG side information (MPEG (MPEG information side spatial generates encoder
or stereo audio channels represent a downmix of the original multi-channel audio that is generated by the the by generated is that audio multi-channel original the of downmix a represent channels audio stereo or
MPEG Surround is an ISO/IEC standard to extend mono mono extend to standard ISO/IEC an is Surround MPEG or stereo audio towards multiple channels. The mono mono The channels. multiple towards audio stereo or
0 Introduction Introduction 0
in an AES3 bitstream AES3 an in
Carriage of MPEG Surround Surround MPEG of Carriage
digital audio engineering - - engineering audio digital
AES standard for for standard AES
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(r2017) (r2017) AES55-2012 AES55-2012