Re: [AVT] Requesting feedback on new CELT codec

["Christian Hoene" <hoene at uni-tuebingen.de>]

Hello Roni,

isn't the G.719 covered by patents? (Ericsson patents as far as I know.)
I believe that we need more open-source and free codecs. 

Nowadays, you can make telephone calls for free but must pay for the
telephone codec? Is this the right way to go?

With best regards,
 
Christian


> -----Original Message-----
> From: Even, Roni [mailto:roni.even at polycom.co.il]
> Sent: Saturday, July 26, 2008 8:08 PM
> To: Christian Hoene; Jean-Marc Valin
> Cc: avt at ietf.org
> Subject: RE: [AVT] Requesting feedback on new CELT codec
> 
> Jean-Marc,
> I looked at your web site. Note that the ITU-T approved G.719 which is
> a
> low complexity full band codec (40kHz) at rates from 32 - 128 kbit/s
> 
> Roni Even
> 
> > -----Original Message-----
> > From: avt-bounces at ietf.org [mailto:avt-bounces at ietf.org] On Behalf Of
> > Christian Hoene
> > Sent: Saturday, July 26, 2008 8:51 PM
> > To: 'Jean-Marc Valin'
> > Cc: avt at ietf.org
> > Subject: Re: [AVT] Requesting feedback on new CELT codec
> >
> > Hello Jean-Marc,
> >
> > Great work!
> >
> > I would suggest you to support multiple coding rates (from 16 to 200)
> > and
> > various coding delays ranging from 2ms (for interactive ensemble
> > performances) to higher delays (e.g., 40ms if the is beneficial for
> the
> > audio quality).
> >
> > Then, various application scenarios and the use of CELT over
> congestion
> > aware transport protocols like DCCP or TCP would make sense.
> >
> > With best regards,
> >
> >  Christian Hoene
> >
> >
> >
> >
> > > -----Original Message-----
> > > From: avt-bounces at ietf.org [mailto:avt-bounces at ietf.org] On Behalf
> Of
> > > Jean-Marc Valin
> > > Sent: Tuesday, July 22, 2008 5:55 AM
> > > To: IETF AVT WG
> > > Subject: [AVT] Requesting feedback on new CELT codec
> > >
> > > Hi everyone (bit of background, I'm the author of the Speex speech
> > > codec),
> > >
> > > I have been working on a new codec called CELT. It is not a
> successor
> > > to
> > > Speex, but a much higher quality codec (44.1/48 kHz) with very low
> > > delay
> > > (<10 ms) and rates in the 32-200 kbps range. The bit-stream isn't
> > > frozen
> > > yet and before I freeze it, I would be very interested in feedback.
> > Is
> > > there anything I could add (or remove) to make everyone's life
> > easier.
> > > Any application I'm not considering?
> > >
> > > The website is http://www.celt-codec.org/ and it includes some
> > > comparisons and audio samples. Like Speex, CELT is completely open.
> > >
> > > Cheers,
> > >
> > > 	Jean-Marc
> > > _______________________________________________
> > > Audio/Video Transport Working Group
> > > avt at ietf.org
> > > https://www.ietf.org/mailman/listinfo/avt
> >
> > _______________________________________________
> > Audio/Video Transport Working Group
> > avt at ietf.org
> > https://www.ietf.org/mailman/listinfo/avt

_______________________________________________
Audio/Video Transport Working Group
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