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IEC 61937-5
Edition 2.0 2019-01
INTERNATIONAL
STANDARD
AMENDMENT 1
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater
Systems) format(s)
IEC 61937-5:2006-01/AMD1:2019-01(en)
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IEC 61937-5
Edition 2.0 2019-01
INTERNATIONAL
STANDARD
AMENDMENT 1
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater
Systems) format(s)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.60 ISBN 978-2-8322-6377-8
– 2 – IEC 61937-5:2006/AMD1:2019
© IEC 2019
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
100/3101/CDV 100/3163/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 website 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• withdrawn,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.
_____________
Table 1 – Fields of burst-info
Replace Table 1 with the following new table:
Table 1 – Fields of burst-info
Bits of Reference Repetition period of data-burst
Value Contents
Pc point R in IEC 60958 frames
0 – 4 Data-type
0 – 10 According to IEC 61937
11 DTS type I bit 0 of Pa 512
12 DTS type II bit 0 of Pa 1 024
13 DTS type III bit 0 of Pa 2 048
14 – 16 According to IEC 61937
17 DTS type IV Dependent on bits 8 – 10
14 – 31 According to IEC 61937 bit 0 of Pa
5,6 Reserved
7 According to IEC 61937
Reserved for DTS Types I, II and III,
8 – 10 Repetition period for DTS Type IV, see
Table 6
11 – 12 0 – 3 Profile
13 – 15 According to IEC 61937
© IEC 2019
5.3.4 DTS type IV
Replace 5.3.4 with the following new subclause:
5.3.4 DTS type IV
The DTS bitstream consists of sequences of DTS frames. The data-type of a DTS data-burst
type IV is 11h. The data-burst is headed with a burst-preamble, followed by the burst-payload,
and stuffed with stuffing bits. The data-type-dependent information for DTS type IV is given in
Table 6.
The burst repetition period is set in bits 8 – 10 of Pc (see Table 6). The IEC 60958 frame rate
has an integer relationship to the base sample rate of the compressed audio being delivered.
Any supported base sample rate may be applied. The nominal base sample rate for DTS
type IV is 48 kHz.
Bits 11 and 12 are used to indicate a profile of DTS type IV.
The units of burst_length shall be in bytes. This means the maximum size of a burst is
65 535 bytes.
The reference point of a DTS type IV data-burst is bit 0 of Pa. The data-burst containing DTS
type IV frames shall occur at a regular rate, with the reference point of each DTS type IV
data-burst beginning one audio frame period after the reference point of the preceding DTS
type IV data-burst.
It is recommended that pause data-bursts be used to
...