Patents by Inventor Winston M. Johnston

Winston M. Johnston has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Local hash-based motion estimation for screen remoting scenarios
    Patent number: 11095877
    Abstract: Innovations in motion estimation adapted for screen remoting scenarios are described. For example, a video encoder calculates a hash value for a current block in a current picture. The video encoder searches, subject to a spatial constraint, for a matching block in a reference picture (e.g., the previous picture in display order) based at least in part on the hash value for the current block. The spatial constraint defines a search area in the reference picture within which hash values for candidate blocks in the reference picture may be compared to the hash value for the current block. By using a spatial constraint to limit the range of the local hash-based motion estimation, the video encoder can speed up the motion estimation process while still considering the candidate blocks in the reference picture that are most likely to match the current block.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: August 17, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: B. Anil Kumar, Winston M. Johnston, Olof L. E. Mases, Shir Aharon, Lihua Zhu
  • LOCAL HASH-BASED MOTION ESTIMATION FOR SCREEN REMOTING SCENARIOS
    Publication number: 20180152699
    Abstract: Innovations in motion estimation adapted for screen remoting scenarios are described. For example, a video encoder calculates a hash value for a current block in a current picture. The video encoder searches, subject to a spatial constraint, for a matching block in a reference picture (e.g., the previous picture in display order) based at least in part on the hash value for the current block. The spatial constraint defines a search area in the reference picture within which hash values for candidate blocks in the reference picture may be compared to the hash value for the current block. By using a spatial constraint to limit the range of the local hash-based motion estimation, the video encoder can speed up the motion estimation process while still considering the candidate blocks in the reference picture that are most likely to match the current block.
    Type: Application
    Filed: November 30, 2016
    Publication date: May 31, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: B. Anil Kumar, Winston M. Johnston, Olof L.E. Mases, Shir Aharon, Lihua Zhu