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Groups > comp.compression > #2248
| From | Phil Carmody <thefatphil_demunged@yahoo.co.uk> |
|---|---|
| Newsgroups | comp.compression |
| Subject | Re: Truffman coding |
| Date | 2014-03-09 16:56 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <87iorne7yn.fsf@bazspaz.fatphil.org> (permalink) |
| References | <XnsA2E876D4DAC24jamesdowallen@178.63.61.175> |
James Dow Allen <gmail@jamesdowallen.nospam> writes: > Pursuing a recent discussion here, I developed a new static-probability > coding method I call "Truffman Coding." It may seem obvious and > uninteresting but AFAIK I've never seen such a variant published. (I think > 20th-century quasi-arithmetic codes mostly handle only binary decisions.) > > I've described the invention at > http://fabpedigree.com/james/truffman.htm#sect2 > (I've pointed this URL at section 2, which may be the only section of that > long-winded description worth reading.) > > This code is similar to Huffman coding except that trits are sometimes > developed and used for probabilities not well approximated by a power of > 1/2. Huffman codes have an inherent waste of, typically, almost 0.03 bits > per token compared with the Shannon limit. With Truffman coding the > inefficiency can be reduced to about 0.01 bits per token. > > For various reasons, this new code may have no real practical value > whatsoever. Nevertheless, it may be interesting enough for a conference > paper, or suggest a related method that would be useful. Any interest? Not read it closely, but it seems as if there are some ?Tunstall-related ideas in your Truffmann. Phil -- Religion is too important a matter to its devotees to be a subject of ridicule. If they indulge in absurdities, they are to be pitied rather than ridiculed. -- Immanuel Kant (1724-1804), lecture at Konigsberg, 1775
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Truffman coding James Dow Allen <gmail@jamesdowallen.nospam> - 2014-03-06 04:40 +0000 Re: Truffman coding BGB <cr88192@hotmail.com> - 2014-03-07 00:34 -0600 Re: Truffman coding Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2014-03-09 16:56 +0200
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