Patents by Inventor Kent W. MacKay

Kent W. MacKay 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).

  • Digital speech signal processing for pitch change with jump control in accordance with pitch period
    Patent number: 4792975
    Abstract: Digital processing of speech signals for compression/expansion pitch change is provided by writing and reading a ROM at different rates and controlling the discard/repeat segments of memory to be approximately integral multiples of the pitch period with means to track the pitch period as it is changing and modify the discard/repeat segments accordingly.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: December 20, 1988
    Assignee: The Variable Speech Control ("VSC")
    Inventor: Kent W. MacKay
  • Method and apparatus for pitch controlled voice signal processing
    Patent number: 4700391
    Abstract: Digital processing of speech signals for compression/expansion pitch change is provided by writing and reading a ROM at different rates and controlling the discard/repeat segments of memory to be integral multiples of the pitch period. The rear pointer jumps a portion of the memory to either skip a portion (in compression) or retrace a portion (in expansion) of the recorded information. The read pointer jumps so as to avoid crossing the write pointer (thereby avoiding reading old recorded information). The jump occurs when a predetermined spacing or condition is reached between read and write pointers.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: October 13, 1987
    Assignee: The Variable Speech Control Company ("VSC")
    Inventors: George F. Leslie, Jr., Kent W. MacKay