IEC 61937-2:2007/AMD2:2018

IEC 61937-2 ®
Edition 2.0 2018-03
INTERNATIONAL
STANDARD
AMENDMENT 2
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
IEC 61937-2:2007-05/AMD2:2018-03(en)

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IEC 61937-2 ®
Edition 2.0 2018-03
INTERNATIONAL
STANDARD
AMENDMENT 2
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying

IEC 60958 –
Part 2: Burst-info
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.30 ISBN 978-2-8322-5460-8

– 2 – IEC 61937-2:2007/AMD2:2018
 IEC 2018
FOREWORD
This amendment has been prepared by technical area 4: Digital system interfaces and
protocols of IEC technical committee 100: Audio, video and multimedia systems and
equipment.
The text of this amendment is based on the following documents:
CDV Report on voting
100/2944/CDV 100/3032/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

_____________
INTRODUCTION to Amendment 2
The revision of IEC 61937-2:2007 has become necessary to define additional data types.
Amendment 2 contains the following significant technical changes with respect to the base
publication (IEC 61937-2:2007 and IEC 61937-2:2007/AMD1:2011):
a) new audio data-types of ATRAC-X low latency, MPEG-H 3D Audio, MPEG-H 3D Audio
HBR, AC-4, AC-4 HBR4, AC-4 HBR16, AC-4 LD and MPEG-4 ALS in LATM/LOAS are
added;
b) units of Pd column is added to Table 2;
c) update SMPTE reference.
In the next full revision of IEC 61937-2, it is planned to relinquish the use of "Conventional
data-type" and "Subdata-type", replacing them with "data-type bits 0 to 4" and "data-type bits
5 to 6", respectively.
2 Normative references
Insert, in the list of normative references, the following new publications:
IEC 61937-13, Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 – Part 13: MPEG-H 3D Audio

 IEC 2018
IEC 61937-14, Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 – Part 14: Non-linear PCM bitstreams according to the AC-4 format
In the entry for IEC 61937-1, replace "IEC 61937-1" with "IEC 61937-1:2007".
In the entry for IEC 61937-8, replace "IEC 61937-8" with "IEC 61937-8:2006".
3.1 Terms and definitions
Replace the entire existing entry for length-code by the following new entry:
length-code length of the data-burst-payload in bits, bytes or 8-bytes

Table 2 – Data-types
Replace Table 2 and the amendments brought to it in Amendment 1 by the following new
table:
Table 2 – Data-types
Data-type Contents Reference Repetition Units of Pd
value of Pc bit 0 to 6 point R period of
data-burst
Con
...