No, I don't think so. Was: [vorbis] Vorbis 1.0 binary - Beta4 still the best?

Steve Bergman steve at rueb.com
Sat Jul 13 07:58:19 PDT 2002



Steve Bergman wrote:

>
> Call me an audio compression newbie, but I have a question.  The 
> unflac'd versions of all three files are exactly the same size. 
> (md5sums differ, however.)  If information has been lost in two of the 
> files through vorbis encoding and flac is lossless, shouldn't they be 
> smaller than the original?
>
Oops.  I see my fallacy.  wav is constant bit rate and silence takes 
just as many bits as anything else.  However, let me try again.  The 
file sizes of the compressed flac's are also very similar.  Isn't the 
ratio of file sizes of the losslessly compressed data and indicator of 
the percentage of information lost?  I would have expected the 
losslessly compressed/decompressed ogg samples to be much smaller.  Does 
the ogg decoder try to fill in lost information through interpolation or 
something which then has to be losslessly encoded by flac, taking up 
about the same amount of space?

-Steve

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