Re: [Discuss-gnuradio] Proposal Draft: Next Generation Digital Voice Codecs and Vocoders for Amateur Radio

[Bruce Perens]

Gregory Maxwell wrote:
> We've been working on a new lowlatency codec for speech and music,
> CELT, and are about to public a paper on it.  (celt-codec.org).
> While CELT wouldn't be useful for narrowbanded voice some of the
> components of CELT would be very useful in an AMBE killer.
> (Particularly CWRS, the algebraic vector quantizer).  CELT itself
> could be used for a 10-20khz wide mode (40-60kbit/sec with decent SNR)
> to replace FM with something with much greater quality if there was
> interest...   But a lower bandwidth mode will be far more interesting.
>   
Would this be useful to solve the garble problem when there's a 
firefighter with a loud chainsaw in the background? That just kills the 
codecs they use on APCO 25 right now.

   Thanks

   Bruce