DennyL;261455 Wrote: 
> I assume that the people who designed FLAC or WAVE, or whichever
> lossless CODEC, were competent enough to ensure bits in = bits out.
> Surely this is the case?
In fact, normally when I run the FLAC encoder, I run it with the
"verify" option, which runs a decoder in parallel with the encoding
process to prove that, indeed, bits out = bits in.  The FLAC tester
proves (beyond reasonalbe doubt) that bits out at a later date still =
bits in when it was encoded by making an MD5 hash of the unencoded
audio as it is being encoded.  When FLAC test is run at a later date,
the audio is decoded, another MD5 hash is created and compared with the
hash generated when it was originally encoded.  This proves, among other
things, version compatibility if it was encoded with one version but
decoded with another.


-- 
Timothy Stockman
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