Thread View: comp.dsp
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Started by Vincent Cate
Fri, 30 Oct 1992 02:06
Re: GSM 06.10 13 kbit/s RPE/LTP speech compression available
Author: Vincent Cate
Date: Fri, 30 Oct 1992 02:06
Date: Fri, 30 Oct 1992 02:06
35 lines
1614 bytes
1614 bytes
>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.
And it compiles first try! Works just like Unix compress, uncompress, and
zcat (-c works!). They use the names toast, untoast, tcat. Seems to be
better than twice as fast as realtime on my machine.
I am getting a compression factor of about 5 off of stuff from /dev/audio on
my Sparc. I can not tell any difference in sound quality after compression,
(may be partly due to the speaker on my sparc being rather poor).
It is really easy to use:
cat /dev/audio > foo.au
toast foo.au
Because it is so fast you can do:
cat /dev/audio | toast -c > test.gsm
and:
untoast -c test.gsm > /dev/audio
>Jutta Degener (jutta@cs.tu-berlin.de)
>Carsten Bormann (cabo@cs.tu-berlin.de)
Thanks very much! Nice stuff!
-- Vince
PS So you don't have to go back to the other post, the FTP path was:
tub.cs.tu-berlin.de:pub/tubmik/gsm-1.0.tar.Z
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