| Name : gsm
| |
| Version : 1.0.10
| Vendor : Funktronics
|
| Release : 9
| Date : 2002-12-02 05:07:13
|
| Group : Development/Libraries/C
| Source RPM : gsm-1.0.10-9.src.rpm
|
| Size : 0.16 MB
| |
| Packager : Christian Schaller < Uraeus_linuxrising_org>
| |
| Summary : Shared libraries for GSM speech compressor.
|
Description :
Contains runtime shared libraries for libgsm, an implementation of
the European GSM 06.10 provisional standard for full-rate speech
transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse
excitation/long term prediction) coding at 13 kbit/s.
GSM 06.10 compresses frames of 160 13-bit samples (8 kHz sampling
rate, i.e. a frame rate of 50 Hz) into 260 bits; for compatibility
with typical UNIX applications, our implementation turns frames of 160
16-bit linear samples into 33-byte frames (1650 Bytes/s).
The quality of the algorithm is good enough for reliable speaker
recognition; even music often survives transcoding in recognizable
form (given the bandwidth limitations of 8 kHz sampling rate).
The interfaces offered are a front end modelled after compress(1), and
a library API. Compression and decompression run faster than realtime
on most SPARCstations. The implementation has been verified against the
ETSI standard test patterns.
|
