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Comment by derf_ | Hacker News Reader

There were something like 40 companies involved in AV1 standardization. Quite a few technical contributions did not come from Google, and quite a few of Google's proposals were substantially modified by feedback from others before they were included (and not all of them were eventually included).

Source: I lead Mozilla's technical contributions to AV1.

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It saddens me to see discourse on the internet about AV1's ancestry being focused on Google's VPx line of contributions, while diminishing those coming from Daala (entropy coder...) and Thor (QMs...), as well as inter-company collaborations (CDEF).

A redeeming outcome is that with AVIF's new image tuning modes (both in libaom and SVT-AV1), Gianni and I managed to utilize as many AV1 coding tools as possible, including QMs that sorely needed a well-deserved spotlight.

Also, thanks for paving the way to the current state of multimedia compression! I'm a longtime fan of Xiph(ophorus) since the 1.0 beta/RC Vorbis days. We used your image sets a lot during our testing.

You're welcome. That is what those image sets were for.

I was really happy Thomas Davies added quantization matrices to the spec, because if he hadn't, I would have had to. Fortunately, he did a good job. I am glad someone is finally using them. Don't sleep on per-segment quantizer deltas, either.

Hello derf.

I think you might like this: https://github.com/Uranite/svt-av1-tritium#from-svt-av1-hdr-...

Me and a bunch of friends (mainly Clybius and Yiss/Uranite), after I was constantly saying daala was a great low complexity visual metric that should be added back to AV1 encoders, we decided to implement it into yet another svt-av1 encoder fork: https://github.com/Uranite/svt-av1-tritium#from-svt-av1-hdr-...

It has been showing great performance overall and is quite nice. It can work on CDEF, like it did in aomenc-av1 back in 2018/early 2019. It does so very well.

We've also implemented deeper controls, but that is still experimental.

Thank you so much for your work on daala stuff, as it's been one of my many inspirations in the field.

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