Patents by Inventor Zhen-Yen Lai

Zhen-Yen Lai 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).

  • Hardware friendly constrained motion vector refinement
    Patent number: 11310526
    Abstract: A video codec that encodes or decodes video sequences using decoder-side motion vector refinement is provided. The video codec identifies a first motion vector and a second motion vector for coding a current block of pixels of a current video frame in the video sequence. The video codec determines whether to perform motion vector refinement for the current block of pixels based on a comparison between a linear dimension of the current block of pixels and a threshold. When motion vector refinement is performed, the video codec refines the first and second motion vectors to minimize a distortion cost and codes the current block of pixels by using the refined first and second motion vectors. When motion vector refinement is not performed, the video codec codes the current block of pixels by using the identified first and second motion vectors.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: April 19, 2022
    Assignee: MEDIATEK INC.
    Inventors: Chun-Chia Chen, Zhen-Yen Lai, Chih-Wei Hsu, Tzu-Der Chuang, Ching-Yeh Chen
  • Hardware Friendly Constrained Motion Vector Refinement
    Publication number: 20190238883
    Abstract: A video codec that encodes or decodes video sequences using decoder-side motion vector refinement is provided. The video codec identifies a first motion vector and a second motion vector for coding a current block of pixels of a current video frame in the video sequence. The video codec determines whether to perform motion vector refinement for the current block of pixels based on a comparison between a linear dimension of the current block of pixels and a threshold. When motion vector refinement is performed, the video codec refines the first and second motion vectors to minimize a distortion cost and codes the current block of pixels by using the refined first and second motion vectors. When motion vector refinement is not performed, the video codec codes the current block of pixels by using the identified first and second motion vectors.
    Type: Application
    Filed: January 15, 2019
    Publication date: August 1, 2019
    Inventors: Chun-Chia Chen, Zhen-Yen Lai, Chih-Wei Hsu, Tzu-Der Chuang, Ching-Yeh Chen