Thor is a royalty free video codec under development by Cisco Systems. The specifications of Thor were available in various Internet-Drafts.
On July 22, 2015, Thor was presented to the IETF as a candidate for their NETVC video standard. Thor uses some Cisco elements that are also used by HEVC. 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.
References
Thor (video codec) Wikipedia(Text) CC BY-SA