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BS IEC 61937-14:2017

BS IEC 61937-14:2017

$142.49

Digital audio. Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 – Non-linear PCM bitstreams according to the AC-4 format

Published By Publication Date Number of Pages
BSI 2017 30
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This part of IEC 61937 describes the method to convey non-linear PCM bit streams encoded according to the AC-4 format.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
9 3.6 Abbreviated terms
4 Mapping of the audio bit stream on to IEC 61937-1
4.1 General
4.2 AC-4 burst-info
Tables
Table 1 – Shorthand notation for fractional frame rates
10 5 Format of AC-4 data-bursts
5.1 General
5.2 Pause data-burst
5.3 Audio data-burst
5.3.1 The AC-4 data
Table 2 – Fields of burst-info
Table 3 – Repetition period of the Pause data-bursts
11 Figures
Figure 1 – AC-4 data-burst
Table 4 – Data-type-dependent information for AC-4
12 Table 5 – AC-4 base sampling frequency, AC-4 audio framerate and corresponding AC-4 data-burst repetition period
Table 6 – AC-4 data-burst sequence and repetition period variance at 29,97, 59,94 and 119,88 fps
13 Table 7 – AC-4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 48 kHz
Table 8 – AC-4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 44,1 kHz
14 5.3.2 Latency of the AC-4 decoder
Figure 2 – Latency of AC-4 decoding
Table 9 – Maximum burst-length values per AC-4 data-burst repetition period
15 5.3.3 The AC-4 HBR4 data
Figure 3 – AC-4 HBR4 data-burst
Table 10 – Data-type-dependent information for AC-4 HBR4
16 Table 11 – AC-4 base sampling frequency, AC-4 audio frame rate and corresponding AC-4 HBR4 data-burst repetition period
Table 12 – AC-4 HBR4 data-burst sequence and repetition period variance at 29,97, 59,94 and 119,88 fps
17 Table 13 – AC-4 HBR4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 192 kHz
Table 14 – AC-4 HBR4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 176,4 kHz
18 5.3.4 Latency of the AC-4 HBR4 decoder
Figure 4 – Latency of AC-4 HBR4 decoding
Table 15 – Maximum burst-length values per AC-4 HBR4 data-burst repetition period
19 5.3.5 The AC-4 HBR16 data
Figure 5 – AC-4 HBR16 data-burst
20 Table 16 – Data-type-dependent information for AC-4 HBR16
Table 17 – AC-4 base sampling frequency, AC-4 audio frame rate and corresponding AC-4 HBR16 data-burst repetition period
21 Table 18 – AC-4 HBR16 data-burst sequence and repetition period variance at 29,97, 59,94 and 119,88 fps
Table 19 – AC-4 HBR16 data-burst: meaning of Pc bits 8 – 11 at an IEC 60958 frame rate of 768 kHz
Table 20 – AC-4 HBR16 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 705,6 kHz
22 5.3.6 Latency of the AC-4 HBR16 decoder
Table 21 – Maximum burst-length values per AC-4 HBR16 data-burst repetition period
23 5.3.7 The AC-4 LD data
Figure 6 – Latency of AC-4 HBR16 decoding
24 Figure 7 – AC-4 LD data-burst
Table 22 – Data-type-dependent information for AC-4 LD
Table 23 – AC-4 base sampling frequency, AC-4 audio frame rate and corresponding AC-4 LD data-burst repetition period
25 5.3.8 Latency of the AC-4 LD decoder
Table 24 – AC-4 LD data-burst sequence and repetition period variance at 119,88 fps
Table 25 – AC-4 LD data-burst: meaning of Pc bits 8 to 11
Table 26 – Maximum burst-length values per AC-4 data-burst repetition period
26 Figure 8 – Latency of AC-4 LD decoding
27 Figure A.1 – An AC-4 sync frame
Annex A (normative) AC-4 sync frame
Table A.1 – AC-4 sync frame syntax
Table A.2 – framesize()
28 Table A.3 – AC-4 syncword values

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BS IEC 61937-14:2017
$142.49