search for: zpaq

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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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.tinc...
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...