GSM 06.10 Lossy Speech Compressor Library and Utilities

Edit Package libgsm
http://www.dmn.tzi.org/software/gsm

Contains libraries and binaries for a GSM speech compressor. libgsm contains a standard 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, which is 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 modeled after compress(1) and a library API. Compression and decompression run faster than real-time on most SPARC stations. The implementation has been verified against the ETSI standard test patterns.

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Source Files (show unmerged sources)
Filename Size Changed
baselibs.conf 0000000097 97 Bytes
gsm-1.0.22.tar.gz 0000066583 65 KB
libgsm-1.0.20.patch 0000002155 2.1 KB
libgsm-include.patch 0000000299 299 Bytes
libgsm-paths.patch 0000000632 632 Bytes
libgsm.changes 0000005134 5.01 KB
libgsm.spec 0000004462 4.36 KB
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