Read this reaction from xiphmont: https://xiphmont.dreamwidth.org/84214.html

It paints a quite different picture.

This comes off as rather dismissive. Xiphmont simultaneously claims that Jarek's work is useless ("the performance claims just don't hold up") and that Google needs a defensive patent on it.

As someone on encode.ru pointed out, "if Google genuinely wanted this as a defensive patent, then the right approach is to work with Jarek and pay for him to file a patent on ANS itself blocking as many of the spin-off patents as possible." They didn't even talk to him before patenting his work.

> "the performance claims just don't hold up"

see now the fatcs in https://sites.google.com/site/powturbo/entropy-coder and how rANS based entropy coder outperforms the current AOMedia AV1 entropy coder by 7 times.

Put it in AV1 and it doesn't.

The entropy coder in AV1 right now is Daala_EC. It's the entropy coder because we measured it directly against rANS and the other candidate encoders and it performed the best.

Hell, you can check out the code, build with the different entropy coders, and test it yourself.