Patents by Inventor Lifeng Zhao

Lifeng Zhao 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).

  • Publication number: 20030067981
    Abstract: The present invention is related to video encoding. In an embodiment, a bit budget is calculated for a first scene. In addition, bit budgets for corresponding frames, including at least a first frame, within the first scene are determined. Optionally, bit budgets corresponding to macroblocks within the first frame are also determined.
    Type: Application
    Filed: March 5, 2002
    Publication date: April 10, 2003
    Inventors: Lifeng Zhao, Ioannis Katsavounidis
  • Publication number: 20030053537
    Abstract: The present invention is related to video encoding. In an embodiment, a sequence of frames is received. For each frame in at least a portion of the sequence of frames, a corresponding mean of absolute differences value weighted by a temporal parameter between frames bracketing said each frame is calculated. At least partly based on the corresponding mean of absolute differences value weighted by a temporal parameter, a first frame in the sequence of frames is skipped.
    Type: Application
    Filed: March 5, 2002
    Publication date: March 20, 2003
    Inventors: Chang-Su Kim, Ioannis Katsavounidis, Lifeng Zhao
  • Publication number: 20030053538
    Abstract: The present invention is related to video encoding. In an embodiment, a first root mean squared (RMS) value is calculated for a first frame relative to a second frame, and a second frame relative to a third frame. A second temporal derivative RMS value is calculated. Based at least in part on the second derivative value, the second frame is designated as a scene change frame.
    Type: Application
    Filed: March 5, 2002
    Publication date: March 20, 2003
    Inventors: Ioannis Katsavounidis, Chang-Su Kim, Lifeng Zhao