[Flac-dev] nice idea
hod at wuff.dhs.org
Wed Oct 2 04:22:56 PDT 2002
I think he's trying to reversibly massage the data in order to exploit
strengths in those compression programs. I'm a bit fuzzy on the details
too, but it does seem to me that general purpose compression might
reduce the disk size of the residual. I'm not sure if the space gain
would justify the extra decompression effort, though.
On Tue, 2002-10-01 at 20:58, Josh Coalson wrote:
> --- "Marco \"elcabesa\" Belli" <elcabesa at inwind.it> wrote:
> > some times ago i was playing with coding, shannon theoremes and other
> > stuff,
> > i have tried without success to compress audio wave, and i have
> > notice that
> > simply oversampling audio material enacnhe a lot compression ratio
> > i only take awav file, oversampled it by 20 tiimes and then
> > compressi it
> > using pkzip or rar.
> > i don0't remember if i also do a CONSTANT PREDICTION,
> > iony know that pkzip and rar nicely work when they have to compress a
> > file
> > that has few symbols
> > pkzip fail compressing chinese, or wave file
> > but work with english text couse it has only 20 symbols=)
> > a wav file has 2^16 simbols.. but if you oversampled it and then make
> > a
> > CONSTANT PREDICTION you can reduce the nunber of truly used symbols
> > to a
> > lower number.
> I don't totally follow... what do you mean by 'oversample'
> and 'constant prediction'?
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