Patents by Inventor Toan Q. Hoang

Toan Q. Hoang 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).

  • Method and apparatus for detecting scene changes in a digital video stream
    Patent number: 6014183
    Abstract: The present invention relates to a device which monitors a digitized video data stream and detects when scene changes occur in the video stream. The present invention detects scene changes by comparing from frame-to-frame each of the pixel colors within the frame. When a high degree of change in pixel color from one frame to the next is detected, this is identified as a scene change. The system of the present invention does not obtain the digitized video data stream by polling a hardware analog-to-digital converter. In order to ensure that the present invention is compatible with any input video source, the present invention does not request data directly from the hardware video digitizing card. Instead, the input video may be displayed upon a computer monitor in any manner, such as by the operating system of the computer.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: January 11, 2000
    Assignee: Imagine Products, Inc.
    Inventor: Toan Q. Hoang