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libgsm1

Shared libraries for GSM speech compressor.

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.

Homepage:-
Package version:1.0.10-10
Architecture:i386
Distribution:Other
Filename:libgsm1_1.0.10-10.deb

/usr/share/doc/libgsm1/README.gz

GSM 06.10 13 kbit/s RPE/LTP speech compression available
--------------------------------------------------------

The Communications and Operating Systems Research Group (KBS) at the
Technische Universitaet Berlin is currently working on a set of
UNIX-based tools for computer-mediated telecooperation that will be
made freely available.

As part of this effort we are publishing an implementation 
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/usr/share/doc/libgsm1/ChangeLog.gz

Fri Jul  5 19:26:37 1996 	Jutta Degener (jutta@cs.tu-berlin.de)

	* Release 1.0 Patchlevel 10
	src/toast_alaw.c: exchanged A-law tables for something
		slightly more A-law.

Tue Jul  2 12:18:20 1996  Jutta Degener (jutta@cs.tu-berlin.de)

	* Release 1.0 Patchlevel 9
	src/long_term.c: in FLOAT_MUL mode, an array was accessed past its end
	src/gsm_option.c: three options related to WAV #49 packing

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/usr/share/doc/libgsm1/ChangeLog.orig.gz

Tue Jul  2 12:18:20 1996  Jutta Degener (jutta@cs.tu-berlin.de)

	* Release 1.0 Patchlevel 9
	src/long_term.c: in FLOAT_MUL mode, an array was accessed past its end
	src/gsm_option.c: three options related to WAV #49 packing
	src/gsm_encode.c: support WAV #49-style encoding.
	src/gsm_decode.c: support WAV #49-style decoding.
	tls/sour.c: generate the WAV bit shifting code, encode
	tls/ginger.c: ge
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/usr/share/doc/libgsm1/changelog.Debian.gz

libgsm (1.0.10-10) unstable; urgency=low

  * Update copyright information.
  * Update to Standards 
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/usr/share/doc/libgsm1/COPYRIGHT.gz

Copyright 1992, 1993, 1994 by Jutta Degener and Carsten Bormann,
Technische Universitaet Berlin

Any
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/usr/share/doc/libgsm1/copyright

This is the Debian GNU/Linux prepackaged version of libgsm, an implementation of the
European GSM 06
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