Thor (video codec)

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Thor
Developed by Cisco Systems
Type of format Video codec
Extended to NETVC , AV1
Open format ? Yes
Free 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 [ edit ]

  1. ^ A. Fuldseth; G. Bjontegaard; S. Midtskogen; T. Davies; M. Zanaty (2016-03-18). "Thor Video Codec" . IETF . Retrieved 2016-06-14 .
  2. ^ "NETVC IETF 93" . Internet Engineering Task Force . Retrieved 2015-08-11 .
  3. ^ "Thor: High Efficiency, Moderate Complexity Video Codec using only RF IPR" (PDF) . Internet Engineering Task Force . Retrieved 2015-08-11 .
  4. ^ NETVC Hackathon Results IETF 93 (Prague) (PDF)
  5. ^ "New open standard for Ultra High Definition video will enable enhanced video playback" . Alliance for Open Media . 2015-09-01. Archived from the original on 2015-09-03 . Retrieved 2015-09-01 .
  6. ^ Stephen Shankland (2015-09-01). "Tech giants join forces to hasten high-quality online video" . CNET . Retrieved 2015-09-01 .
  7. ^ Zimmerman, Steven (15 May 2017). "Google's Royalty-Free Answer to HEVC: A Look at AV1 and the Future of Video Codecs" . XDA Developers . Archived from the original on 14 June 2017 . Retrieved 10 June 2017 .
  8. ^ 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.
  9. ^ "Thor update and AV1 comparisons" . IETF . Retrieved 23 May 2018 .

External links [ edit ]

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