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From: rshapiro@arris.com (Richard Shapiro)
Newsgroups: rec.audio.high-end
Subject: Re: data compression
Message-ID: <12040@uwm.edu>
Date: 10 May 91 17:37:27 GMT
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Originator: tjk@csd4.csd.uwm.edu

In article <11954@uwm.edu> 09nilles%cuavax.dnet@netcon.cua.edu (Fiver Toadflax) writes:
>I haven't seen the details(algorithm) of the DCC compression scheme, but
>if it is any decient, nothing will be lost.  Afterall, look at programs
>such as PCZIP, UUencode, compress.


No, it isn't like these compression programs. The DCC system *does*
lose information, intentionally -- it throws away anything which is,
in theory, inaudible; and then dynamically reallocates bits across the
frequency spectrum, putting the most bits where the most audible
signal is. This encode/decode process is definitely not transparent.
The differences may or may not be relevant (audible) but there will be
differences.