Patents by Inventor Eizi Asano

Eizi Asano 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).

  • Noise reduction apparatus and audio output apparatus
    Patent number: 7551743
    Abstract: The FM broadcast is received and the FM demodulated FM composite signal is stereo demodulated, and when the high band components of the demodulated signal are few, the correction is conducted by using the signals just before and just after the noise generation period, and when the high band components are large, the interpolation is conducted by using a central value calculated from the value of a predetermined period before the noise generation period, and a central value calculated from the value of a predetermined period after the noise generation period.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: June 23, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Tsujishita, Masayuki Tsuji, Kenichi Taura, Masayuki Ishida, Eizi Asano
  • Multipath noise reducer, audio output circuit, and FM receiver
    Patent number: 6665526
    Abstract: A multipath noise reducer detects and removes the individual noise spikes occurring in an interval of multipath noise, thereby reducing the multipath noise with relatively little distortion of the output signal. The threshold signal used to detect multipath noise is varied depending on reception conditions. The gate pulses indicating the presence of multipath noise spikes are preferably expanded by variable amounts, depending on both reception conditions and the signal level. Multipath noise spikes are preferably replaced by a smoothed signal. These provisions further reduce perceived distortion of the audio output signal.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: December 16, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masayuki Tsuji, Eizi Asano, Masahiro Tsujishita, Kenichi Taura, Masayuki Ishida
  • Multipath noise reducer, audio output circuit, and FM receiver
    Publication number: 20010044289
    Abstract: A multipath noise reducer detects and removes the individual noise spikes occurring in an interval of multipath noise, thereby reducing the multipath noise with relatively little distortion of the output signal. The threshold signal used to detect multipath noise is varied depending on reception conditions. The gate pulses indicating the presence of multipath noise spikes are preferably expanded by variable amounts, depending on both reception conditions and the signal level. Multipath noise spikes are preferably replaced by a smoothed signal. These provisions further reduce perceived distortion of the audio output signal.
    Type: Application
    Filed: December 14, 2000
    Publication date: November 22, 2001
    Inventors: Masayuki Tsuji, Eizi Asano, Masahiro Tsujishita, Kenichi Taura, Masayuki Ishida