Patents by Inventor Donald Fong Gee

Donald Fong Gee 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).

  • Multi-channel echo cancellation method and apparatus
    Patent number: 5856970
    Abstract: An echo canceller (500) utilizes a central control unit (502) (CCU) and at least one convolution processing unit (504) (CPU) to perform echo cancellation on one or more channels. A method for operating the echo canceller (500) controls reading (706) one or more reference signals (510) and reflected signals (512), convolution and adaptive processing (11, 21, 31, 41) using the CPUs (504), and post-processing (702) to produce one or more echo cancelled signals (514). Convolution and adaptive processing for multiple channels can be performed simultaneously (11, 31) by multiple CPUs (504), or in a time-multiplexed manner (11, 21) by a single CPU (504), or a combination (11, 21, 31, 41) of simultaneous and time-multiplexing by multiple CPUs (504). CCU (502) is able to perform processing functions (702-730) while CPUs (504) perform convolution and adaptive processing (11, 21, 31, 41).
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: January 5, 1999
    Assignee: Motorola, Inc.
    Inventors: Donald Fong Gee, Bruce Edward Geren, James Brian Piket, William Chunhung Yip