Patents by Inventor Parijat Ashok Oak

Parijat Ashok Oak 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).

  • Microphone calibration with an RGSC beamformer
    Patent number: 8009840
    Abstract: It is intended to improve and automate the calculation of calibration filters connected downstream from the microphones of an RGSC beamformer. To this end it is proposed that an adaptive calibration filter calculation unit be used, by means of which calibration filters are calculated from the output signals of adaptive blocking filters such that the power of an output signal of a blocking filter subtracted from a reference signal and filtered by means of a calibration filter respectively is minimized. The calibration filters connected downstream from the microphones are then replaced by the calibration filters thus determined.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: August 30, 2011
    Assignee: Siemens Audiologische Technik GmbH
    Inventors: Walter Kellermann, Parijat Ashok Oak