Displaying 2 results from an estimated 2 matches for "zpaq".
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ipaq
2011 Jul 18
1
Question on how to get involved in 1.1 development
A while back I expressed interest in trying to add additional
compression formats (XZ, ZPAQ-derived). What would be the best way for
me to try these with the 1.1 codebase? And can 1.1 be used with 1.0.x
nets out-of-box?
http://en.wikipedia.org/wiki/Xz
http://mattmahoney.net/dc/zpaq.html
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2016 Mar 16
0
NHW codec - progress
...of 8).For the
higher compression settings, I will need a good "psycho-visual"
quantization to know which wavelet coefficients remove/diminish.
I have also new ideas for the compression (entropy coding) scheme.Right
now, my compression scheme for the wavelet coefficients is equivalent to
ZPAQ -method 4 (but very faster).With my new ideas, I think I can improve
compression by 1-2%, which will put my scheme on the same level as ZPAQ
-method 5!
I haven't made much research, but I would also need better YUV420 2x2
up/down-sampling functions (mines are too basic and not really good).If...