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Package: libgsm-tools (1.0.13-4)

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User binaries for a GSM speech compressor

This package contains user binaries 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: Accessibility Support: Speech Synthesis, Implemented in: C, User Interface: interface::commandline, protocol::voip, Role: Program, Scope: Utility, Sound and Music: sound::compression, sound::player, Speech Synthesis, Purpose: Playing Media, Supports Format: works-with-format::TODO, works-with::audio

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amd64 42.7 kB163.0 kB [list of files]
armel 20.4 kB147.0 kB [list of files]
armhf 19.8 kB138.0 kB [list of files]
i386 20.6 kB149.0 kB [list of files]
ia64 48.1 kB192.0 kB [list of files]
kfreebsd-amd64 42.7 kB121.0 kB [list of files]
kfreebsd-i386 20.6 kB107.0 kB [list of files]
mips 38.9 kB152.0 kB [list of files]
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s390x 44.1 kB169.0 kB [list of files]
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