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GSM 06.10 Lossy Speech Compressor Library and Utilities

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.

Source Files (show merged sources derived from linked package)

Filename Size Changed Actions
baselibs.conf 97 Bytes almost 7 years ago Download File
gsm-1.0.13.tar.bz2 56.2 KB almost 9 years ago Download File
libgsm-1.0.13.patch 5.87 KB almost 9 years ago Download File
libgsm-include.patch 207 Bytes over 11 years ago Download File
libgsm-paths.patch 632 Bytes over 11 years ago Download File
libgsm-strict-aliasing.patch 216 Bytes over 11 years ago Download File
libgsm.changes 2.3 KB almost 5 years ago Download File
libgsm.spec 7.45 KB almost 5 years ago Download File

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