Patents by Inventor Brian J. Roden

Brian J. Roden 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 changing the timbre and/or pitch of audio signals
    Patent number: 5641926
    Abstract: A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: June 24, 1997
    Assignee: IVL Technologis Ltd.
    Inventors: Brian C. Gibson, Christopher M. Jubien, Brian J. Roden
  • Method and apparatus for changing the timbre and/or pitch of audio signals
    Patent number: 5567901
    Abstract: A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: October 22, 1996
    Assignee: IVL Technologies Ltd.
    Inventors: Brian C. Gibson, Christopher M. Jubien, Brian J. Roden