flac dev - Sep 2004 - nice idea

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.

try it=)
and may be it will work=)

or maybe it will not =)

see you
good work
and sorry ofr my bad english

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@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'?
> 
> Josh
> 
> 
> 
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--- "Marco \"elcabesa\" Belli" <elcabesa@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'?

Josh



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