[vorbis-dev] Vocoders

[Gregory Maxwell]

"   Texas Instruments has intellectual property rights on the MELP
   algorithm. The Texas Instruments contact for licensing issues for
   commercial and non-government use is William Gordon, Director,
   Government Contracts, Texas Instruments Incorporated, Semiconductor
   Group (phone 972 480 7442). "

<cough>It's nice to know that it's forbidden to use public funds to
further private intrests.</cough>

On Thu, 11 May 2000 seanl at literati.org wrote:

> The DoD has a 2400 bps vocoder with quality similar to 4kbps CELP.  It's
> called Mixed Excitation Linear Predictor.  I've played around with it and
> it has excellent quality (though nowhere near GSM; you can still tell
> you're using a vocoder) and handles background noise pretty well.  This is
> definitely more recent than LPC-10.  GSM is 13 kbps, so I suppose it
> depends on what sort of bitrate and quality you want.
> 
> http://www.plh.af.mil/ddvpc/index.html
> 
> This page has MELP, LPC, CELP, and CVSD.  I didn't see source code there,
> so if you want source code for MELP, email me and I'll track it down (I
> have it on a machine without Internet access right now).

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