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1 total messages Started by Vincent Cate Fri, 30 Oct 1992 02:06
Re: GSM 06.10 13 kbit/s RPE/LTP speech compression available
#34
Author: Vincent Cate
Date: Fri, 30 Oct 1992 02:06
35 lines
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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