Re: [Audacity-devel] Possible improved click removal

[Steve t. F. <ste...@gm...>]

>From my own tests for removing clicks, the major problem for the Click
Removal effect is with click detection rather than the repair. For
short clicks, although linear interpolation is very simplistic, it is
quick and the result sounds virtually no different from much more
sophisticated methods.

For longer clicks, where linear interpolation does fall down, the
"Repair" tool works very well, though computation time increases
rapidly if the length of the correction is much over a couple of
hundred samples. If your algorithm works well with such long sections
without excessive processing time then I'd expect there to be a lot of
interest in that.

Steve

On 14 June 2014 03:59, John A deLaubenfels <ada...@co...> wrote:
>
> Hi,
>
> I'm a developer [1].  I recently acquired a copy of Audacity and wonder if its click removal could be improved.  It appears that most of the time the program draws a straight line across the lost region, which is waaaay better than the original click, but I think could be improved.  It happens that I've written a program in C++ that does phased extraction on the harmonic content of a signal, leaving inharmonic "mud".  That could be done on each side of a click and, I think, the results projected across the gap, preserving the phase of harmonic signals for a smooth connection at each end.  I believe this should be possible even for high frequency components, reconstructing many cycles within the lost region.  The remaining mud, or hiss, could be propagated across the gap by any of several techniques, and preservation of phase is not important with hiss, as long as care is taken at the connection points.
>
> Does this seem like an interesting enhancement?
>
> Thanks,
> JdL
>
>
> [1] One slice of my work is the back end of the image enhancement program http://www.photoproto.com/ .
>
>
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