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IEC 62574
Edition 2.0 2020-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Audio, video and multimedia systems – General channel assignment
of multichannel audio
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IEC 62574
Edition 2.0 2020-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Audio, video and multimedia systems – General channel assignment
of multichannel audio
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.30 ISBN 978-2-8322-7839-0
– 2 – IEC 62574:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 2
1 Scope . 7
2 Normative reference . 7
3 Terms and definitions . 7
4 General channel assignment . 16
4.1 General . 16
4.2 Model . 16
4.3 Channel maps and labels . 19
5 Metadata . 21
5.1 General . 21
5.2 Metadata list . 22
5.3 Definition of loudspeaker position . 23
Annex A (normative) Channel maps and labels in edition 1 . 25
A.1 General . 25
A.2 Terms and definitions. 25
A.3 General channel assignment . 29
A.3.1 General . 29
A.3.2 The model . 29
A.4 Channel maps and labels . 30
Annex B (informative) Comparison table . 32
B.1 General . 32
B.2 Comparison table for each edition of IEC 62574 . 32
B.3 Comparison table for numbering of the channel . 33
B.4 Comparison table for surround sound amplifier in consumer market . 34
B.5 Comparison table between this document and ITU-R BS2051-1 . 38
B.6 Comparison table between this document and ITU-R BS2094-1 . 40
B.7 Comparison table between this document and ISO/IEC 23001-8 . 46
Bibliography . 49
Figure 1 – Model of channel spaces . 17
Figure 2 – Overhead layer . 17
Figure 3 – High layer . 18
Figure 4 – Middle layer . 18
Figure 5 – Bottom layer. 19
Figure 6 – Channel assignment on the display . 19
Figure 7 – Scope of metadata . 22
Figure 8 – Loudspeaker location . 23
Figure A.1 – Model of channel spaces . 29
Figure A.2 – Top layer . 29
Figure A.3 – Middle layer . 30
Figure A.4 – Bottom layer . 30
Table 1 – General channel assignment . 20
Table 2 – Metadata . 23
Table 3 – Definition of loudspeaker angle . 24
Table A.1 – General channel assignment table in IEC 62574:2011 . 31
Table B.1 – Comparison table for each edition of IEC 62574 . 32
Table B.2 – Comparison table for numbering of the channel . 33
Table B.3 – Comparison table for surround sound amplifier in consumer market (1 of 3) . 34
Table B.4 – Comparison table between this document and ITU-R BS2051-1 (1 of 2) . 38
Table B.5 – Comparison table between this document and ITU-R BS2094-1 (1 of 6) . 40
Table B.6 – Comparison table between this document and ISO/IEC 23001-8 (1 of 3) . 46
– 4 – IEC 62574:2020 RLV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUDIO, VIDEO AND MULTIMEDIA SYSTEMS –
GENERAL CHANNEL ASSIGNMENT OF MULTICHANNEL AUDIO
FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change has
been made. Additions are in green text, deletions are in strikethrough red text.
International Standard IEC 62574 has been prepared by technical area 20 of IEC technical
committee 100: Audio, video and multimedia systems and equipment.
This second edition cancels and replaces the first edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) model of channel assignment spaces is changed;
b) definition of channel maps and labels is changed;
c) metadata is newly specified;
d) channel maps and labels from the first edition are included in Annex A.
The text of this International Standard is based on the following documents:
CDV Report on voting
100/3198/CDV 100/3246/RVC
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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