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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.