Re: [codec] Discussion around ITU LS
Jean-Marc Valin <jmvalin@mozilla.com> Thu, 08 September 2011 14:28 UTC
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Date: Thu, 08 Sep 2011 10:30:13 -0400
From: Jean-Marc Valin <jmvalin@mozilla.com>
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To: Anisse Taleb <Anisse.Taleb@huawei.com>
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Cc: Jonathan Rosenberg <jonathan.rosenberg@skype.net>, "codec@ietf.org" <codec@ietf.org>
Subject: Re: [codec] Discussion around ITU LS
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Hi Anisse, I agree that time stretching/shortening is a desirable feature. However, I think in the case of Opus it is best implemented outside the decoder using a good generic algorithm, rather than re-inventing the wheel. Of course, if you think an integrated implementation would be better, you are welcome submit a patch for it. Cheers, Jean-Marc On 08/09/11 06:38 AM, Anisse Taleb wrote: > Dear Jean Marc, > >>> Does the WG consider time shortening / stretching functionality they >>> would want to include in opus as a technique to use for PLC? >> While time stretching/shortening is something that can be useful, I >> don't think it's really necessary for a codec *specification*. In fact >> even the PLC is provided only as an example. > > Quoting the requirements document RFC 6366: > " It is desirable for the reference implementation to provide a time stretching/shortening > implementation, although it should not be normative." > > While I agree that this is something that should be non-normative, such an integrated implementation > would be an important feature for any codec deployed on the internet and really differentiate Opus wrt. "codecs" which are considered unsuitable for the internet. > > Kind regards, > /Anisse > >
- [codec] Discussion around ITU LS Cullen Jennings
- Re: [codec] Discussion around ITU LS Stephan Wenger
- Re: [codec] Discussion around ITU LS Monty Montgomery
- Re: [codec] Discussion around ITU LS Jean-Marc Valin
- Re: [codec] Discussion around ITU LS Gregory Maxwell
- Re: [codec] Discussion around ITU LS Anisse Taleb
- Re: [codec] Discussion around ITU LS Jean-Marc Valin
- Re: [codec] Discussion around ITU LS Anisse Taleb
- Re: [codec] Discussion around ITU LS Jean-Marc Valin
- Re: [codec] Discussion around ITU LS Christian Hoene
- Re: [codec] Discussion around ITU LS Anisse Taleb
- Re: [codec] Discussion around ITU LS Michael Ramalho (mramalho)
- Re: [codec] Discussion around ITU LS Benjamin M. Schwartz
- Re: [codec] Discussion around ITU LS Gregory Maxwell
- Re: [codec] Discussion around ITU LS Jean-Marc Valin
- Re: [codec] Discussion around ITU LS Jean-Marc Valin
- Re: [codec] Discussion around ITU LS Michael Ramalho (mramalho)
- Re: [codec] Discussion around ITU LS Benjamin M. Schwartz
- Re: [codec] Discussion around ITU LS Benjamin M. Schwartz
- Re: [codec] Discussion around ITU LS Anisse Taleb
- Re: [codec] Discussion around ITU LS Koen Vos