Patents by Inventor Albert A-Chuan Hsueh

Albert A-Chuan Hsueh 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 motion compensated video coding
    Patent number: 6721359
    Abstract: Apparatus and methods are provided for encoding video data in a manner which significantly reduces the computation performed by the video encoder and the video decoder without suffering any degradation in the perceived quality of the compressed video data. In particular, apparatus and methods are provided for determining which blocks might be zeroed out after quantization. This determination is performed after motion estimation, the classification of the frame as either an I frame, P frame, or a B frame, and the determination of a quantization step size (QP) for the block, but before DCT. If a given block is determined to be a “zero” quantized block, then the DCT, quantization, zig-zag scan and variable length coding steps are omitted, and a variable length code output is provided indicating that the block B is a “zero” quantized block.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: April 13, 2004
    Assignee: Skyworks Solutions, Inc.
    Inventors: Anurag Bist, Wei Wu, Albert A-Chuan Hsueh
  • Pre-quantization in motion compensated video coding
    Patent number: 6275527
    Abstract: Apparatus and methods are provided for encoding video data in a manner which significantly reduces the computation performed by the video encoder and the video decoder without suffering any degradation in the perceived quality of the compressed video data. In particular, apparatus and methods are provided for determining which blocks might be zeroed out after quantization. This determination is performed after motion estimation, the classification of the frame as either an I frame, P frame, or a B frame, and the determination of a quantization step size (QP) for the block, but before DCT. If a given block is determined to be a “zero” quantized block, then the DCT, quantization, zig-zag scan and variable length coding steps are omitted, and a variable length code output is provided indicating that the block B is a “zero” quantized block.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: August 14, 2001
    Assignee: Conexant Systems, Inc.
    Inventors: Anurag Bist, Wei Wu, Albert A-Chuan Hsueh