[vorbis-dev] cbr/vbr decoding - supported sample rates

[Michael Smith]

On Friday 07 March 2003 20:07, Mete BALCI wrote:
> Hi,
>
> Is there any difference between decoding of CBR or VBR streams in realtime
> in terms of CPU usage/cost?
>

No. Encoding CBR is much slower than encoding VBR, but decoding is the same 
(probably not quite identical, but close enough that you'd be very hard 
pressed to tell the difference...)

> Are sample rates other than 44100Hz supported by Vorbis officially ? If it
> is supported, is it efficient to use them or is Vorbis specifically (or at
> the moment) optimized for 44100Hz ?
>

Yes, other sample rates are officially supported. 44.1 kHz is the best tuned 
sample rate (this is not to say others are bad - but obviously 44.1 kHz gets 
a lot more use than others, so it will tend to be marginally better), but if 
you're trying for lower bitrates lower sample rate helps a fair bit. If you 
want to do 48 kHz instead, that's close enough to 44.1 kHz that it'll make 
little difference to the encoder. 

Mike

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