[FFmpeg-devel] [PATCH] swresample/resample: improve bessel function accuracy

Ganesh Ajjanagadde gajjanag at mit.edu
Tue Nov 3 00:49:19 CET 2015

On Mon, Nov 2, 2015 at 6:37 PM, wm4 <nfxjfg at googlemail.com> wrote:
> On Mon,  2 Nov 2015 14:49:54 -0500
> Ganesh Ajjanagadde <gajjanagadde at gmail.com> wrote:
>> This improves accuracy for the bessel function, and this in turn should
>> improve the quality of the Kaiser window.
> "Should"? Does it or does it not? If you don't know, why the patch?

It improves the window in the sense of mathematically matching the
Kaiser window expression due to the improved bessel function accuracy.
That claim I have verified and placed in the commit message with

What that translates into in terms of resampling accuracy, I don't
know. Normally, such things do help reduce the noise floor, but I
don't know an easy way to test via FATE or associated tools. I put
that caveat in the bottom lines of the patch.

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