[Flac-dev] Blocking and compression.

Josh Coalson xflac at yahoo.com
Fri Jan 23 12:57:02 PST 2004

--- Wayde Milas <wmilas at rarcoa.com> wrote:
> The last one is truely frightening. AT&T hold the patent. The link
> for
> it is at:
> Trying to read and grok it is mind numbing. the synopsis mentions its
> for arithmitic encoding, but the best I can tell from trying to read
> it,
> its possible to apply it to ANY entropy system that has an estimator
> that is self adapting. 
> I also don't understand how AT&T can hold a patent on something that
> is
> inherent in the arithmetic patent which was awwared before the AT&T
> patnent.
> Unless I'm reading this wrong, which I may be, flac is in violation
> of
> this patent even though its not an arithmetic encoder. Read the
> patent
> and tell me what you think.

this patent does not cover the FLAC reference encoder.  the
entropy coder does not accumulate occurrences of individual
symbol values, as specified in claim 1; it uses a single
measure (mean or variance) of the overall residual distribution.


Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!

More information about the Flac-dev mailing list