[clug] Free Lossless Audio Codec
David Gibson
david at gibson.dropbear.id.au
Thu Jun 17 01:32:01 GMT 2004
On Thu, Jun 17, 2004 at 12:39:42AM +1000, David wrote:
> Hi all,
> I have been using flac for a few years now to backup my CD collection.
> To give you a real world example of the compression, I wrote a little
> program to calculate some statistics, the results are:
>
> albums: 334
> uncompressed bytes: 181292672736
> compressed bytes: 117164817673
> best: 0.439121(Kyuss - And the Circus Leaves Town.flac)
> worst: 0.768185(Green Day - Insomniac.flac)
> avg comp: 0.646274
>
> (The uncompressed size is an approximation based on no. of samples *
> bits per sample) actual uncompressed size may be a bit larger due to wav
> headers etc)
>
> Average compression ratio is around 0.65, not quite as good as 2:1, but
> still saves me >60GB as you can see.
Heh.. that's surprisingly poor. My intuition would have been that you
could do better with basic techniques on audio files. So much for
intuition.
--
David Gibson | For every complex problem there is a
david AT gibson.dropbear.id.au | solution which is simple, neat and
| wrong.
http://www.ozlabs.org/people/dgibson
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