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Thusnelda: Modernizing Theora

Time:14:30 - 15:15
Day:Friday 22 January 2010
Location:Renouf 1 (MFC)
Project: Ogg Theora

Ogg Theora, as the most mature of the open-source video codecs, is the patent-unencumbered candidate for a new web video standard. However, the encoder shipped with the 1.0 release in 2008 consisted mostly of unmodified code from the late 90's. The Thusnelda project was started to bring the encoder into the modern age, using all of the things we've learned about video coding in the intervening decade. This has brought substantial improvements in quality at a given bitrate, while retaining backwards compatibility in the decoder. The project also produced decoder speedups and additional encoder features.



This talk will cover some of these enhancements and demonstrate the improvements in quality, speed, and stability. It is intended for an audience with a technical background, but little signal processing experience is required.



Attendees may wish to view my LCA 2008 talk, "Anatomy of a Video Codec", which describes the Theora format in detail, though this is not essential.

Timothy Terriberry

Dr. Terriberry received dual B.S. and M.S. degrees in both Mathematics and Computer Science from Virginia Tech in 1999 and 2001, respectively, and a Ph.D. in Computer Science from the University of North Carolina at Chapel Hill in 2006. Since 2002 he has been a volunteer for the Xiph.org Foundation, a non-profit organization that develops free, open multimedia protocols and software. He is the primary author of the Theora specification and the primary developer of libtheora. His research interests include audio and video compression, motion tracking, target recognition, medical image analysis, computer vision, optical character recognition, hyperspectral imaging, general purpose computation on GPUs, and machine learning.