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Simon G Best (talk | contribs) |
AC vs. RC |
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:::::On the matter of whether or not arithmetic coding is range encoding, it seems we're not (yet) in agreement. Perhaps I've misunderstood what arithmetic coding is, but if, as you say, range encoding is "more specific" than arithmetic coding, then there must be at least one example of arithmetic coding (even if it's just theoretical) that isn't also range encoding. Could you refer me to one? I would find it enlightening :-)
:::::--[[User:Simon G Best|Simon G Best]] 17:23, 22 July 2006 (UTC)
::::::I'm just saying that I've seen range coding used in specific contexts (a certain procedure) and arithmetic coding used in general contexts (many procedures and different associated methods, e.g., adaption, binary tree coding with contexts, m-ary coding via reduction to binary, etc.). This could be because I haven't seen range coding much at all, but I ''assumed'' it was because range coding was used in a much more limited sense. And if the term "range coding" is never used for processes currently under patent while arithmetic coding certainly is), this explains the "range coding is patent free" claim. If you can find someone who claims that range coding, as practiced by in large, violates a patent — contradicting [[User:Antaeus Feldspar|Antaeus Feldspar]]'s earlier comment — that would prove me wrong about this. It would also be useful to find someone who knows a bit about range coding itself, e.g., the author of the web sites you've pointed to and/or the author of the prior version of the web page. Because I'm not that someone.
::::::To go back to my original point: It isn't that range coding and arithmetic coding can't be considered alike. It's that saying they're the same and patent issues are confused pretty much says that range coding isn't notable, at least not more than any other method in a random paper on source coding. Or that it's notable because people think mistaken things about it. As is, the article itself is confusing because range coding is presented as a tutorial device, while I've never seen it used as such. I know you just wanted to eliminate confusion and misperception, but I think the revision causes confusion itself.
::::::Anyway, I think that's all I'll have to say about the matter. Hopefully someone who knows more about this can confirm or deny what you've said about the subject. [[User:Calbaer|Calbaer]] 06:02, 23 July 2006 (UTC)
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