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Over the last three years, we have published a number of Daala technology demos. With pieces of Daala being contributed to the Alliance for Open Media's AV1 video codec, now seems like a good time to go back over the demos and see what worked, what didn't, and what changed compared to the description we made in the demos.

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Deringing banner

Here's the latest addition to the Daala demo series. This demo describes the new Daala deringing filter that replaces a previous attempt with a less complex algorithm that performs much better. Those who like the know all the math details can also check out the full paper.

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Here's my new contribution to the Daala demo effort. Perceptual Vector Quantization has been one of the core ideas in Daala, so it was time for me to explain how it works. The details involve lots of maths, but hopefully this demo will make the general idea clear enough. I promise that the equations in the top banner are the only ones you will see!

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As a contribution to Monty's Daala demo effort, I decided to demonstrate a technique I've recently been developing for Daala: image painting. The idea is to represent images as directions and 1-D patterns.

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jmvalin

June 2017

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