Patents by Inventor Takaya Kakizaki

Takaya Kakizaki 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).

  • Loop gain estimating apparatus and howling preventing apparatus
    Patent number: 8917885
    Abstract: A pseudo noise superimposing unit superimposes a pseudo noise (M-sequence) to an audio signal picked up by a microphone and outputs the superimposed signal to an amplifying system. An calculating unit calculates a correlation value between the audio signal picked up by the microphone and the pseudo noise. The calculating unit estimates a gain of a closed loop based on the correlation value. A gain control unit suppresses a gain of the audio signal based on the estimated gain of the closed loop.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: December 23, 2014
    Assignee: Yamaha Corporation
    Inventors: Shinya Sakurada, Takuro Sone, Takaya Kakizaki, Sachiya Sasaki, Kosuke Saito
  • LOOP GAIN ESTIMATING APPARATUS AND HOWLING PREVENTING APPARATUS
    Publication number: 20110182439
    Abstract: A pseudo noise superimposing unit superimposes a pseudo noise (M-sequence) to an audio signal picked up by a microphone and outputs the superimposed signal to an amplifying system. An calculating unit calculates a correlation value between the audio signal picked up by the microphone and the pseudo noise. The calculating unit estimates a gain of a closed loop based on the correlation value. A gain control unit suppresses a gain of the audio signal based on the estimated gain of the closed loop.
    Type: Application
    Filed: September 24, 2009
    Publication date: July 28, 2011
    Applicant: YAMAHA CORPORATION
    Inventors: Shinya Sakurada, Takuro Sone, Takaya Kakizaki, Sachiya Sasaki, Kosuke Saito