Thor (video codec)
| Developed by | Cisco Systems |
|---|---|
| Type of format | Video codec |
| Extended to | NETVC, AV1 |
| Open format? | Yes |
| Website | https://github.com/cisco/thor |
Thor is a royalty-free video codec under development by Cisco Systems. The specifications of Thor were available in various Internet Drafts.[1]
On July 22, 2015, Thor was presented to the IETF as a candidate for their NETVC video standard.[2] Thor uses some Cisco elements that are also used by HEVC.[3] As part of the NETVC work, the Constrained Low-Pass Filter (CLPF) and motion compensation techniques used in Thor were tested in conjunction with the lapped transform coding techniques from the Daala codec.[4]
On September 1, 2015, Cisco announced that the Alliance for Open Media would use elements of Thor to develop a royalty free video format, AOMedia Video 1.[5][6][7]
According to Steinar Midtskogen, a principal Thor developer and AV1 contributor, Thor is in good shape for real-time CPU encoding (as of NETVC meeting 101, March 19, 2018), in strong contrast to AV1 at the same time.[8] Thor development had stalled for the finalization of AV1, but Midtskogen envisaged further Thor development by merging the Daala entropy coder and adding more tools for screen content.[9]
References
- ↑ A. Fuldseth; G. Bjontegaard (2016-03-18). "Thor Video Codec". https://tools.ietf.org/html/draft-fuldseth-netvc-thor-02.
- ↑ "NETVC IETF 93". Internet Engineering Task Force. https://www.ietf.org/proceedings/93/minutes/minutes-93-netvc.
- ↑ "Thor: High Efficiency, Moderate Complexity Video Codec using only RF IPR". https://www.ietf.org/proceedings/93/slides/slides-93-netvc-4.pdf.
- ↑ NETVC Hackathon Results IETF 93 (Prague) (PDF)
- ↑ "New open standard for Ultra High Definition video will enable enhanced video playback". Alliance for Open Media. 2015-09-01. http://aomedia.org/press-release/alliance-to-deliver-next-generation-open-media-formats/.
- ↑ Stephen Shankland (2015-09-01). "Tech giants join forces to hasten high-quality online video". http://www.cnet.com/news/tech-giants-join-forces-to-hasten-high-quality-online-video/.
- ↑ Zimmerman, Steven (15 May 2017). "Google's Royalty-Free Answer to HEVC: A Look at AV1 and the Future of Video Codecs". https://www.xda-developers.com/av1-future-video-codecs-google-hevc/.
- ↑ IETF101-NETVC-20180319-1550. IETF - Internet Engineering Task Force. 19 March 2018. Retrieved 23 May 2018 – via YouTube.
It's certainly possible to get real-time encoding with Thor, that we know, but for AV1, it's not proven yet.
- ↑ "Thor update and AV1 comparisons". https://datatracker.ietf.org/meeting/101/materials/slides-101-netvc-thorav1-update-01.
External links
- Source code repository on GitHub
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