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- Newsgroups: comp.compression.research
- From: radford@cs.toronto.edu (Radford Neal)
- Subject: Re: C source for Fractal compression, huh !
- Message-ID: <92Nov21.142916edt.79@neuron.ai.toronto.edu>
- Organization: Department of Computer Science, University of Toronto
- References: <MICHAEL.92Nov13144140@pullet.lanl.gov> <1992Nov16.184754.3170@maths.tcd.ie> <Bxu712.LvA@metaflow.com> <1992Nov18.024912.24072@maths.tcd.ie> <92Nov20.145206edt.589@neuron.ai.toronto.edu> <1992Nov21.151212.20315@maths.tcd.ie>
- Date: 21 Nov 92 19:29:40 GMT
- Lines: 38
-
- In article <1992Nov21.151212.20315@maths.tcd.ie> tim@maths.tcd.ie (Timothy Murphy) writes:
-
- >>Chaitin/Kolmogorov Algorithmic Information Theory does not give such
- >>a limit, for the very reason you note - it depends on a particular
- >>choice of universal Turing machine.
-
- >This is a complete red herring.
- >All right, let us agree to take the universal machine
- >defined in
- >
- >@book{davis73
- >author = " Davis, M.",
- >title = "Computability and unsolvability",
- >publisher = "Dover",
- >year = 1973,
- >isbn = 0486614719
- >}
-
-
- Go right ahead and adopt this Turing machine for all your computing
- needs if it makes you happy, but I suspect you'll find it a bit slow
- and awkward, as well as difficult to get good repair service for.
-
- As for myself, I'm happy to use whatever machine seems convenient at
- the time. In particular, if I'm interested in storing images compactly
- for later display, I'm happy to use a "machine" that is carefully
- tailored so that there are short "programs" that produce images that
- crop up a lot, at the expense of long "programs" for images that don't
- occur very often.
-
- What is it about data compression that induces so much confusion in
- the layperson? Half of them seem to think it plausible that one
- could compress any data set into practically nothing without any
- knowledge of the source probabilities, while the other half think
- that knowledge of the source is irrelevant in light of mythical
- "theoretical limits" . . .
-
- Radford Neal
-