🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.dsp
Article #34

Re: GSM 06.10 13 kbit/s RPE/LTP speech compression available

#34
From: 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
Technical Details
Message-ID: <BwwwJH.37E.1@cs.cmu.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!kithrup!hoptoad!pacbell.com!att-out!rutgers!usc!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!news.sei.cmu.edu!fs7.ece.cmu.edu!crabapple.srv.cs.cmu.edu!vac

Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!sparky!uunet!kithrup!hoptoad!pacbell.com!att-out!rutgers!usc!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!news.sei.cmu.edu!fs7.ece.cmu.edu!crabapple.srv.cs.cmu.edu!vac
From: vac+@cs.cmu.edu (Vincent Cate)
Newsgroups: comp.dsp
Subject: Re: GSM 06.10 13 kbit/s RPE/LTP speech compression available
Message-ID: <BwwwJH.37E.1@cs.cmu.edu>
Date: 30 Oct 92 02:06:51 GMT
Sender: news@cs.cmu.edu (Usenet News System)
Organization: School of Computer Science, Carnegie Mellon
Lines: 35
Nntp-Posting-Host: furmint.nectar.cs.cmu.edu