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rANS with static probability distributions | The ryg blog
https://fgiesen.wordpress.com/2014/02/18/rans-with-static-probability-distributions
When I grow up I'll be an inventor. RANS with static probability distributions. February 18, 2014. In the previous post. Last time, we defined the rANS encoding and decoding functions, assuming a finite alphabet. Of n symbols numbered 0 to n-1. Is the frequency of symbol s,. Is the sum of the frequencies of all symbols before s, and. Is the sum of all symbol frequencies. Then a given symbol s has (assumed) probability. So I’m going to refer you there for details on how to do this optimally. Which are kno...
fgiesen.wordpress.com
rANS notes | The ryg blog
https://fgiesen.wordpress.com/2014/02/02/rans-notes
When I grow up I'll be an inventor. February 2, 2014. We’ve been spending some time at RAD looking at Jarek Duda’s ANS/ABS coders ( paper. This is essentially a new way of doing arithmetic coding with some different trade-offs from the standard methods. In particular, they have a few sweet spots for situations that were (previously) hard to handle efficiently with regular arithmetic coding. Charles has already posted a good introduction. Okay If you're working with infinite-precision integers, that&...