Patents by Inventor Jack Ouyang

Jack Ouyang 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 performing MPEG II dequantization and IDCT
    Patent number: 6728313
    Abstract: A dequantization block is provided for performing dequantization calculations on a block of encoded video signal data using a modified standard quantization matrix. The modified standard quantization matrix is a product of a standard quantization matrix and a diagonal cosine matrix. The dequantization block receives a modified standard quantization matrix, the modified standard quantization matrix being a product of a standard quantization matrix corresponding to the encoded video data stream and a diagonal cosine matrix. In addition the dequantization block receives a scale representing a compression ratio of the encoded video data stream and non-zero IDCT coefficient matrix corresponding to a block of the encoded video data. The dequantization block then multiplies the scale, the non-zero IDCT coefficient matrix and the modified standard quantization matrix. An IDCT block is provided for performing IDCT calculations on each block processed by the dequantization block.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: April 27, 2004
    Assignee: Intel Corporation
    Inventors: Kuei-Chung Tu, Yan Liu, Jack Ouyang, Xiaoping Hu, Roger Hsu