Patents by Inventor David A. Rumball

David A. Rumball 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: 10714067
    Abstract: A controller, method, system, and computer-readable medium, for producing control signals. The controller comprises a pressure sensor, a hinged input mechanism configured to receive input forces and direct them towards the sensor, and a processor. The processor is configured to receive a signal from the pressure sensor indicating that the hinged input mechanism is being depressed or released and, based on the received signal, to determine, during a time interval, a rate of change of pressure detected at the sensor. The processor also generates a control signal associated with the hinged input mechanism, wherein the control signal comprises a velocity characteristic representing a speed at which the hinged input mechanism is depressed or released, and the velocity characteristic is based at least partly on the determined rate of change of pressure. In one example embodiment, the control signal is an audio control.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: July 14, 2020
    Assignee: ROLI Ltd.
    Inventors: Ning Xu, Hong Yeul Eom, Christopher Slater, David A Rumball, Thomas J Waldron
  • Patent number: 5124688
    Abstract: Method and apparatus process a composite video signal, converted it to component video signals which are processed digitally to produce reprogrammable digital RGB graphics signals. Specifically, a composite video signal is first digitized and then processed to convert digitized YUV component video signals into digitized RGB signals by means of a RAM-based table lookup technique optimized to the resolution of each of the component signals so as to minimize memory requirements and computation overhead. In a specific embodiment, a Y or luminance signal having a resolution of 6 bits is employed in connection with a V component signal having a resolution of 5 bits and a U component signal having a resolution of 3 bits without noticeable degradation of RGB color quality.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: June 23, 1992
    Assignee: MASS Microsystems
    Inventor: David A. Rumball