Patents by Inventor Kensuke Hayashi

Kensuke Hayashi 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).

  • Publication number: 20080015409
    Abstract: This treatment device for endoscope is used for cutting body tissue while the treatment device is retractably projected from a catheter. The treatment device includes: a control wire inserted into the catheter; and a cutting electrode mounted at the distal end of the control wire with the cutting electrode being imparted a bent configuration in advance. The cutting electrode elastically deforms in a state where the cutting electrode is retracted into the catheter, thereby assuming such a shape as to resemble the configuration of the catheter.
    Type: Application
    Filed: March 7, 2007
    Publication date: January 17, 2008
    Inventors: David Barlow, Kunihide Kaji, Takayuki Suzuki, Masatoshi Sato, Kensuke Hayashi, Takayasu Mikkaichi, Junji Shiono
  • Patent number: 6516066
    Abstract: An object of the present invention is to turn microphones accurately and quickly toward a sound source. The first microphone pair is rotated by rotation means and driving means, so that the microphones are equidistant from a sound source. The sound picked up by the microphones is analyzed in a plurality of frequency ranges to obtain delay time components of the arrival of the sound wave. The delay time components are averaged with a prescribed coefficients so that the lower frequency components hardly affects the result of the direction detection. The averaged delay is converted into an angle of direction of the sound source. Thus, the microphones pair is directed in front of the sound source on the basis of the direction angle converted from the averaged delay time.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: February 4, 2003
    Assignee: NEC Corporation
    Inventor: Kensuke Hayashi
  • Publication number: 20010028719
    Abstract: An object of the present invention is to turn microphones accurately and quickly toward a sound source. The first microphone pair is rotated by rotation means and driving means, so that the microphones are equidistant from a sound source. The sound picked up by the microphones is analyzed in a plurality of frequency ranges to obtain delay time components of the arrival of the sound wave. The delay time components are averaged with a prescribed coefficients so that the lower frequency components hardly affects the result of the direction detection. the averaged delay is converted into an angle of direction of the sound source. Thus, the microphones pair is directed in front of the sound source on the basis of the direction angle converted from the averaged delay time.
    Type: Application
    Filed: March 29, 2001
    Publication date: October 11, 2001
    Inventor: Kensuke Hayashi
  • Patent number: 6064733
    Abstract: An echo canceller apparatus consists of a frame aligner circuit and an echo canceller. The frame aligner circuit forcibly generates a data slip of a receive input signal by a recursive buffer of a FIFO when a slip between timings of receive and transmit clocks is accumulated. A data slip detection circuit outputs its detection of the data slip to an adaptation correction section of the echo canceller. In the adaptation correction section, when the data slip of the receive input signal is detected depending on the output of the data slip detection circuit, a correction operation is performed so that a delay by N taps is increased in an impulse response of an H-register, thereby canceling an echo.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: May 16, 2000
    Assignee: NEC Corporation
    Inventor: Kensuke Hayashi
  • Patent number: 5740242
    Abstract: An echo canceler is disclosed having a voice detector. When the voice detector detects the absence of input signals, the echo canceler is trained. In the training mode, the echo canceler receives an impulse signal from an impulse generator, as input through a switching device. When the input of the echo canceler is the impulse signal, a switch is turned off, a signal on a receiving line is stored in a tap coefficient memory, and the impulse signal on a transmitting line is stored in a transmission signal memory. Using the signals stored in the two memories, a convolution operation is performed by a convolution arithmetic unit. The data of the tap coefficient memory directly before the end of training are used for the tap coefficients after the training period.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: April 14, 1998
    Assignee: NEC Corporation
    Inventor: Kensuke Hayashi