Layer ii – Antex Electronics SX-33e Digital Audio Adapter User Manual
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In the Antex driver the bitrate is specified on a per-channel basis.
Therefore, requesting 64 kbits/s and stereo will result in a 128
kbits/s compressed MPEG stream. Supported bitrates (per chan-
nel) and compression ratios are as follows:
Layer I
32 Khz
44.1 Khz
48 Khz
Bitrate
(kbits/s)
Compression
ratio
Bitrate
(kbits/s)
Compression
ratio
Bitrate
(kbits/s)
Compression
ratio
32
16
32
22.1
32
24.0
64
8.0
64
11.0
64
12.0
96
5.3
96
7.4
96
8.0
128
5.5
128
6.0
160
4.8
Layer II
32 Khz
44.1 Khz
48 Khz
Bitrate
(kbits/s)
Compression
ratio
Bitrate
(kbits/s)
Compression
ratio
Bitrate
(kbits/s)
Compression
ratio
32
16
32
22.1
32
24
48
10.7
48
14.7
48
16
56
9.1
56
12.6
56
13.7
64
8.0
64
11.0
64
12.0
80
6.4
80
8.8
80
9.6
96
5.3
96
7.4
96
8.0
112
4.6
112
6.3
112
6.9
128
4.0
128
5.5
128
6.0
160
3.2
160
4.4
160
4.8
192
2.7
192
3.7
192
4.0
224*
2.3
224*
3.2
224*
3.4
256*
2
256*
2.8
256*
3.0
320*
1.6
320*
2.2
320*
2.4
384*
1.3
384*
1.8
384*
2.0
* These bitrates are available for mono files only.
Layer II uses a more sophisticated compression algorithm than
Layer I, so it is recommended that Layer II be used wherever pos-
sible.