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Talk:Arithmetic coding/As a generalized change of radix: Difference between revisions
Talk:Arithmetic coding/As a generalized change of radix (view source)
Revision as of 01:20, 29 January 2016
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:::::::: After all, the Wikipedia page seems to be contradictory, as it mentions both mapping the string to digits (not saying which digits), and bellow referring to <math>\scriptstyle C_i</math> as the cumulative frequency of the current symbol. I agree, it's a mess...
:::::::: (Off-topic: to enable math markup, go to [[Special:Preferences#mw-prefsection-rendering]] and select ''MathML with SVG or PNG fallback'' at the bottom of the page) --[[User:Trizen|Trizen]] ([[User talk:Trizen|talk]]) 21:04, 28 January 2016 (UTC)
:::::::: I don't understand what your confusion is. 0, 1, and 3 are the cumulative frequencies for A, B, and D respectively. The cumulative frequency = the sum of the frequencies of the letters accumulated before it. So if we choose to accumulate in the order A -> B -> D (in order of increasing character code), then for A, the cumulative frequency is 0 (since there's nothing before it); for B, it's the sum of the frequencies for A = 1; for D, it's the sum of the frequencies for A and B = 1 + 2 = 3. If there were another one after that, say Q, its cumulative frequency would be the sum of the frequencies for A, B, and
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