Hello. I'm programing a tool for ip telephony in hifi quality (diploma) ... I want to know what coding delay ogg produces. Are there low delay variantes? Can anyone help me? Thanks
Would speex not be a more appropriate codec for this ? Thomas Bosch wrote:>Hello. > >I'm programing a tool for ip telephony in hifi quality (diploma) ... >I want to know what coding delay ogg produces. >Are there low delay variantes? >Can anyone help me? > >Thanks >_______________________________________________ >Vorbis mailing list >Vorbis@xiph.org >lists.xiph.org/mailman/listinfo/vorbis > > > > >
Speex is fine, but does not provide 'hifi quality'. this is a very important thing for me. So, does anyone know the coding delay of ogg-vorbis? thanks Am Donnerstag, 30. Juni 2005 23:44 schrieben Sie:> Hi, > there is another Xiph project which fits your needs better then Vorbis, > i think. > Have a look at speex.org > > greetz > > > > -----Original Message----- > Date: Thu, 30 Jun 2005 20:42:49 +0200 > Subject: [Vorbis] Delay > From: Thomas Bosch <moers@cs.tu-berlin.de> > To: Vorbis@xiph.org > > Hello. > > I'm programing a tool for ip telephony in hifi quality (diploma) ... > I want to know what coding delay ogg produces. > Are there low delay variantes? > Can anyone help me? > > Thanks > _______________________________________________ > Vorbis mailing list > Vorbis@xiph.org > lists.xiph.org/mailman/listinfo/vorbis
On 6/30/05, Thomas Bosch <moers@cs.tu-berlin.de> wrote:> Hello. > > I'm programing a tool for ip telephony in hifi quality (diploma) ... > I want to know what coding delay ogg produces. > Are there low delay variantes? > Can anyone help me?You're presumably actually asking what delay vorbis has, not what delay ogg has (though as a side note: for this sort of thing, using ogg to encapsulate your vorbis data is inappropriate, and will typically add substantially to the system latency). The latency of the reference vorbis encoder is reasonably high (but I don't think it has been accurately characterised; vorbis simply isn't designed for use in very low latency situations) in VBR mode (I'd expect a substantial fraction of a second), and very high (multiple seconds) in CBR/ABR modes. A much lower-latency encoder could be designed, but that would likely drastically reduce the quality produced. To my knowledge, there is no low delay variant in existence currently. Mike