[linux-audio-dev] Re: Looking for fast integer resampling code

Alfons Adriaensen fons.adriaensen at alcatel.be
Mon Jun 13 09:09:02 UTC 2005


On Mon, Jun 13, 2005 at 04:59:57PM +1000, Erik de Castro Lopo wrote:

> With libsamplerate, I can state that the three sinc based converters
> have the following characteristics:
> 
>                                 SNR        Bandwidth
>     SRC_SINC_FASTEST         102.42 dB      80.23 %
>     SRC_SINC_MEDIUM_QUALITY   98.99 dB      90.68 %
>     SRC_SINC_BEST_QUALITY     97.43 dB      96.96%
> 
> where SNR is signal to noise ratio and Bandwidth its a percentage of
> the theoretical best bandwidth (ie half of the minimum of the source
> and desination sample rate).

What do you mean by 'signal to noise ratio' of a resample algo ? 
I see no reason why it should produce noise, so it's probably not
what the words suggest.

-- 
FA



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