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Package: libgsm1-dev (1.0.13-4)

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Development libraries for a GSM speech compressor

This package contains header files and development 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.

Tags: Software Development: C Development, Libraries, Implemented in: C, Network Protocol: protocol::voip, role::devel-lib, Sound and Music: Compression, Speech Synthesis, Works with: Audio

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Architecture Package Size Installed Size Files
amd64 34.4 kB142.0 kB [list of files]
armel 36.0 kB124.0 kB [list of files]
armhf 33.7 kB113.0 kB [list of files]
i386 34.9 kB145.0 kB [list of files]
ia64 54.4 kB184.0 kB [list of files]
kfreebsd-amd64 34.4 kB103.0 kB [list of files]
kfreebsd-i386 35.1 kB106.0 kB [list of files]
mips 41.2 kB142.0 kB [list of files]
mipsel 41.3 kB142.0 kB [list of files]
powerpc 36.6 kB122.0 kB [list of files]
s390 40.4 kB136.0 kB [list of files]
s390x 42.4 kB152.0 kB [list of files]
sparc 40.5 kB136.0 kB [list of files]