Patents by Inventor Thomas A. Grancey

Thomas A. Grancey 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).

  • Patent number: 4885792
    Abstract: An audio mixer architecture using virtual gain and switching has a single gain stag in each audio input signal path. A plurality of audio input signals are input to respective audio input channels having two or more active gain elements at the output to provide parallel signal paths for each audio input signal. The audio signals from the active gain elements are combined to form up to four audio output channels in any desired combination of audio input signals. The individual audio input signal gains and the master audio output signal gains are synthesized together as a single gain control signal for each active gain element to simulate successive gain stages for each audio input signal path within a single gain stage for that path.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: December 5, 1989
    Assignee: The Grass Valley Group, Inc.
    Inventors: Donald R. Christensen, Robert Bateman, Thomas A. Grancey
  • Patent number: 4858011
    Abstract: Video signal processing apparatus comprises at least first and second source selectors each having a plurality of input terminals, for receiving a plurality of video signals respectively, and at least two output terminals. A set of video processors each have an input terminal and an output terminal. A processor selector is provided for connecting each source selector output terminal selectively to each video processor input terminal. First and second output devices each have a plurality of input terminals connected to the output terminals of the video processors respectively and also have an output terminal. Operator interfaces are connected to the processor selector for defining a first subset of video processors having their input terminals connected to the output terminals of the first source selector and a second subset of video processors having their input terminals connected to the output terminals of the second source selector.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: August 15, 1989
    Inventors: Richard A. Jackson, Peter D. Symes, Richard S. Bannister, Thomas A. Grancey, Richard A. Frasier, John Abt, Ronnie D. Barnett, James E. Blecksmith, Kevin D. Windrem, Neil R. Olmstead
  • Patent number: 4853784
    Abstract: A video switcher comprises a source selector having a plurality of input terminals for connection to a plurality of video sources respectively, and at least two output terminals. At least two processing channels each have an input terminal connected to an output terminal of the source selector and also have an output terminal. A video combiner has video input terminals connected to the output terminals of the processing channels and is operative to combine the output signals provided by the processing channels in dependence upon priority signals.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: August 1, 1989
    Assignee: The Grass Valley Group, Inc.
    Inventors: John Abt, Ronnie D. Barnett, James E. Blecksmith, Kevin D. Windrem, Neil R. Olmstead, Richard A. Jackson, Peter D. Symes, Richard S. Bannister, Thomas A. Grancey, Richard A. Frasier