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Re: low bitrate speech codec enquiry

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Nimo <azeez541@gmail.com> wrote:

> I googled for low bitrate speech codecs for information on
> what is the minimum bitrate a speech codec offers and I found 
> www.speex.org which offers sound at a mimimum of 2500 bits per sec
 
> I wanna know, Are there any other codecs which offer speech 
> less than 2.5kbps? what is the minimum bitrate one can 
> expect for the speech?

Seems to me that the lower you go, the less the output will sound
like the input. The limit should be a speech to text on one end,
and text to speech on the other, where words are sent in between.
(Presumably appropriately coded to minimize the bits). Just before
that, decode and send the phonemes along with appropriate timing.

You might also factor out some of the spectral information, what some
might call voice-print, and only send that at the beginning. No need
to keep sending things that don't change.

> I heard that some vocoders can play sound at 600 bits per second

-- glen

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low bitrate speech codec enquiry Nimo <azeez541@gmail.com> - 2014-02-05 07:29 -0800
  Re: low bitrate speech codec enquiry glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-02-05 17:06 +0000
  Re: low bitrate speech codec enquiry BGB <cr88192@hotmail.com> - 2014-02-05 14:40 -0600

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