Appendix B Audio Specifications
MPEG-1 Layer II Audio
© 2015 Harmonic Inc. All rights reserved.
80
Electra 9200, Rev O
Appendix B
Audio Specifications
This appendix lists the audio specifications for the encoder.
MPEG-1 Layer II Audio
The following table lists the bit rates in Kbps for the sample frequencies of 48 kHz, 44.1 kHz,
and 32 kHz. This table is for MPEG-1 Layer II audio.
Dolby Digital (AC-3) Audio
The Electra™ 9200 supports the AC-3 5.1 format and two-channel in pass-through mode.
NOTE:
Harmonic supports AC-3 pass-through rates of 96 to 640 Kbps, and native AC-3 rates of 56 to
640 Kbps.
Table B–1: MPEG-1 Layer II Audio Bit Rates
Audio Bit
Rate
(Kbps)
Audio without PCR
Audio with PCR
48 kHz
44.1 kHz
(analog
only)
32 kHz
(analog
only)
48 kHz
44.1 kHz
(analog
only)
32 kHz
(analog
only)
32
41.8
38.4
34.8
41.8
38.4
34.8
48
52.2
57.6
55.7
52.2
57.6
55.7
56
62.7
67.2
62.7
62.7
67.2
62.7
64
73.1
67.2
69.6
73.1
76.8
69.6
80
83.6
86.4
83.6
94.0
86.4
90.5
96
104.4
105.6
104.4
104.4
105.6
104.4
112
125.3
115.1
118.4
125.3
124.7
118.4
128
135.8
134.3
132.3
135.8
134.3
139.3
160
167.1
172.7
167.1
167.1
172.7
167.1
192
198.4
201.5
201.9
208.9
201.5
201.9
224
229.8
230.3
229.8
240.2
239.9
236.7
256
271.6
268.7
264.6
271.6
268.7
264.6
320
334.2
335.9
334.2
334.2
335.9
334.2
384
396.9
393.4
396.9
396.9
403.0
396.9
