[daala] Why not upgrading Daala range coding with much faster rANS or tANS?

[Jarek Duda]

Hi,

You are probably aware of new large alphabet accurate entropy coders:
tANS: Huffman-like (tabled, one symbol/lookup: ~500MS/s/core decoding), 
but using nearly accurate probabilities (compression ratio like range 
coding), e.g. https://github.com/Cyan4973/FiniteStateEntropy
rANS: similar to range coding, but many times faster: using single 
multiplication/symbol, more convenient frequency handling, better for 
SIMD, e.g. https://github.com/rygorous/ryg_rans
They are used e.g. in Apple LZFSE (tANS), CRAM 3.0 of European 
Bioinformatics Institute (rANS), LZNA of RAD Game Tools (rANS) and many 
others: 
http://encode.ru/threads/2078-List-of-Asymmetric-Numeral-Systems-implementations 

Paper: 
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=7170048&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D7170048 


I wanted to ask why it is not considered for Daala?

Best,
Jarek

-- 
dr Jarosław Duda
Institute of Computer Science and Computer Mathematics,
Jagiellonian University, Cracow, Poland
http://th.if.uj.edu.pl/~dudaj/