Patents by Inventor Ming-Chang Liu

Ming-Chang Liu 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).

  • 3:2 Pull-down detection
    Patent number: 7203238
    Abstract: In one embodiment, a 3:2 pull-down detection component of a video encoder uses motion vectors to determine whether a repeated field exists in a video sequence. The 3:2 pull-down detection component uses field motion vectors determined by a motion estimator and compares the field motion vectors to a threshold to determine whether a repeated field exists. If a repeated field exists, a video encoder can then eliminate the repeated field.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: April 10, 2007
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Ming-Chang Liu, Wei-Jen Li, Ikuo Tsukagoshi
  • Scene change detection
    Patent number: 7058130
    Abstract: In one embodiment, a scene change detection component of a video encoder uses motion vectors to determine whether a scene change occurs in a video sequence. The scene change detection component uses field motion vectors determined by a motion estimator and compares the field motion vectors to a threshold to determine whether a scene change occurs. In another embodiment, if a scene change occurs, the video encoder can begin a new Group of Pictures (GOP).
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: June 6, 2006
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Ming-Chang Liu, Ikuo Tsukagoshi
  • Video encoder with embedded scene change and 3:2 pull-down detections
    Patent number: 6934335
    Abstract: In one embodiment, a video encoder having a first and second phase of motion estimation, and scene change and 3:2 pull-down detection components is provided. In another embodiment, the first phase of motion estimation determines a set of field motion vectors to execute the scene change and 3:2 pull-down detection components. In another embodiment, the scene change and 3:2 pull-down detection component, and the second phase of the motion estimation occur after the first phase of motion estimation.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: August 23, 2005
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Ming-Chang Liu, Wei-Jen Li, Ikuo Tsukagoshi
  • 3:2 Pull-down detection
    Publication number: 20020150162
    Abstract: In one embodiment, a 3:2 pull-down detection component of a video encoder uses motion vectors to determine whether a repeated field exists in a video sequence. The 3:2 pull-down detection component uses field motion vectors determined by a motion estimator and compares the field motion vectors to a threshold to determine whether a repeated field exists. If a repeated field exists, a video encoder can then eliminate the repeated field.
    Type: Application
    Filed: December 11, 2001
    Publication date: October 17, 2002
    Inventors: Ming-Chang Liu, Wei-Jen Li, Ikuo Tsukagoshi
  • Video encoder with embedded scene change and 3:2 pull-down detections
    Publication number: 20020150160
    Abstract: In one embodiment, a video encoder having a first and second phase of motion estimation, and scene change and 3:2 pull-down detection components is provided. In another embodiment, the first phase of motion estimation determines a set of field motion vectors to execute the scene change and 3:2 pull-down detection components. In another embodiment, the scene change and 3:2 pull-down detection component, and the second phase of the motion estimation occur after the first phase of motion estimation.
    Type: Application
    Filed: December 11, 2001
    Publication date: October 17, 2002
    Inventors: Ming-Chang Liu, Wei-Jen Li, Ikuo Tsukagoshi
  • Scene change detection
    Publication number: 20020146071
    Abstract: In one embodiment, a scene change detection component of a video encoder uses motion vectors to determine whether a scene change occurs in a video sequence. The scene change detection component uses field motion vectors determined by a motion estimator and compares the field motion vectors to a threshold to determine whether a scene change occurs. In another embodiment, if a scene change occurs, the video encoder can begin a new Group of Pictures (GOP).
    Type: Application
    Filed: December 11, 2001
    Publication date: October 10, 2002
    Inventors: Ming-Chang Liu, Ikuo Tsukagoshi