Patents by Inventor Thomas L. McMahon

Thomas L. McMahon 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).

  • Layered coding and decoding of image data
    Patent number: 7020195
    Abstract: An image processing system generates a base layer that represents a low-resolution portion of a source image. The image processing system also generates an enhancement layer that represents a high-resolution portion of the source image. The base layer has an associated aspect ratio and the enhancement layer has an associated aspect ratio that differs from the aspect ratio associated with the base layer. The aspect ratio associated with the base layer corresponds to an aspect ratio associated with low-resolution televisions. The aspect ratio associated with the enhancement layer corresponds to an aspect ratio associated with high-resolution televisions. The base layer can be generated by low-pass filtering the source image and the enhancement layer can be generated by high-pass filtering the source image. The base layer can also be generated by subtracting a portion of the base layer from a corresponding portion of the source image.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: March 28, 2006
    Assignee: Microsoft Corporation
    Inventor: Thomas L. McMahon