24 May
2005
24 May
'05
6:30 p.m.
On Tue, May 24, 2005 at 08:58:33PM +0100, anahata wrote:
On Tue, May 24, 2005 at 02:44:04PM -0400, M P Smoak
wrote:
There is also the speex codec, also from xiph.org and wrappable in an
ogg container. It's optimized for speech.
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In my work I use telephone in similar ways. In
both cases, phone calls
are data.
[snip]
But it's too big. Saving it as a .ogg file
with quality = 4 gets it down
to about 5 meg, I think. So the question is what's a good way to shrink
it down?
For voice you could get away with a lower quality ogg and/or resampling
to a lower sample rate (digital telephony itself uses 8kHz)
For the ultimate in voce compression however, there are free GSM
compression/decompresison tools. In debian the gsm-utils pachage seems
to the the thing you need, no doubt will pull in all the various libgsm*
packages too. I haven't used it, but if you can get it to do what you
want you waon't get better voce compression.
what type file will it be that is easily platform
independent
Ogg vorbis is quite portable. Don't know about the GSM tools.