------------------------ Yahoo! Groups Sponsor --------------------~-->
Make a clean sweep of pop-up ads. Yahoo! Companion Toolbar.
Now with Pop-Up Blocker. Get it for free!
http://us.click.yahoo.com/L5YrjA/eSIIAA/yQLSAA/GP4qlB/TM
--------------------------------------------------------------------~->

There are 2 messages in this issue.

Topics in this digest:

1. GSM algorithm
From: "ben_psxtreme"
2. Re: GSM algorithm
From: "Phil Frisbie, Jr." ________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Fri, 25 Jun 2004 08:14:02 -0000
From: "ben_psxtreme"
Subject: GSM algorithm

Hi everybody !

I am a student achieving an internship in a mobile network company.
They have asked me to realize a GSM compression software. The best
solution, looking at the hard piece of knowledge required to do
everything from scratch, was to find a free code source on the web.

I was then really happy to find Jutta DEgener's source code, on this
website.
http://kbs.cs.tu-berlin.de/~jutta/toast.html

However, I still have some difficulties to understand it quite well.
And I thus have some questions. (My, THAT is an introduction ;-)

To summarize my problems : it does not work. After having looked in
the code, I believe that the header is not taken in account. I have
not found a specific way to take care of it, only 160 samples being
processed again and again.
I have added my own code to add the header, but the sound is awful.
It is impossible to recognize the original file.

I have tested the exectuable found on the website, but I did not
manage to make one working, even with different files...

As you can see, I am pretty stuck, and probably not as skilled as I
would like to. If you have good suggestions to me, I would be really
pleased !

Thanks a lot

Ben

________________________________________________________________________
________________________________________________________________________

Message: 2
Date: Fri, 25 Jun 2004 11:19:11 -0700
From: "Phil Frisbie, Jr."
Subject: Re: GSM algorithm

ben_psxtreme wrote:

> Hi everybody !
>
> I am a student achieving an internship in a mobile network company.
> They have asked me to realize a GSM compression software. The best
> solution, looking at the hard piece of knowledge required to do
> everything from scratch, was to find a free code source on the web.
>
> I was then really happy to find Jutta DEgener's source code, on this
> website.
> http://kbs.cs.tu-berlin.de/~jutta/toast.html
>
> However, I still have some difficulties to understand it quite well.
> And I thus have some questions. (My, THAT is an introduction ;-)
>
> To summarize my problems : it does not work. After having looked in

Please explain "it does not work".

> the code, I believe that the header is not taken in account. I have
> not found a specific way to take care of it, only 160 samples being
> processed again and again.
> I have added my own code to add the header, but the sound is awful.
> It is impossible to recognize the original file.
>
> I have tested the exectuable found on the website, but I did not
> manage to make one working, even with different files...
>
> As you can see, I am pretty stuck, and probably not as skilled as I
> would like to. If you have good suggestions to me, I would be really
> pleased !

I have a cleaned up and easier to use version of GSM 6.10 included in my free
library HawkVoiceDI. You can download it from my site below.

> Thanks a lot
>
> Ben

--
Phil Frisbie, Jr.
Hawk Software
http://www.hawksoft.com

________________________________________________________________________
_____________________________________________________________________________________________ ________________------------------------------------------------------------------------------- -----------------------------------------------------------------