Daala: Building A Next-Generation Video Codec From Unconventional   Technology
  Daala is a new royalty-free video codec that attempts to compete with state-of-the-art royalty-bearing codecs. To do so, it must achieve good compression while avoiding all of their patented techniques. We use technology that is as different as possible from traditional approaches to achieve this. This paper describes the technology behind Daala and discusses where it fits in the newly created AV1 codec from the Alliance for Open Media. We show that Daala is approaching the performance level of more mature, state-of-the art video codecs and can contribute to improving AV1. 
Jean-Marc Valin, Timothy B. Terriberry, Nathan E. Egge, Thomas Daede,   Yushin Cho, Christopher Montgomery, Michael Bebenita
cs.MM