Patents by Inventor Takahisa Hachuda

Takahisa Hachuda 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: 7386139
    Abstract: A sound image control system which is able to concurrently perform sound image localization control for two persons is provided. The sound image control system controls a sound image localization position by reproducing an audio signal from a plurality of loudspeakers. The sound image control system includes at least four loudspeakers for reproducing the audio signal and a signal processing section. The signal processing section sets four points corresponding to both ears of two listeners as control points, and performs signal processing for the audio signal input into the plurality of loudspeakers so that two target sound source positions indicating sound image localization positions of the respective two listeners are set in the same direction with respect to the two listeners. The two target sound source positions are set so as to satisfy the following condition, T1=T2?T3<T4.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: June 10, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Hashimoto, Kenichi Terai, Isao Kakuhari, Takahisa Hachuda
  • Publication number: 20040032955
    Abstract: To provide a sound image control system able to concurrently perform sound image localization control for two persons. The present invention is directed to a sound image control system controlling a sound image localization position by reproducing an audio signal from a plurality of loudspeakers. The sound image control system includes at least four loudspeakers for reproducing the audio signal and a signal processing section. The signal processing section sets four points corresponding to both ears of two listeners as control points, and performs signal processing for the audio signal input into the plurality of loudspeakers so that two target sound source positions indicating sound image localization positions of the respective two listeners are set in the same direction with respect to the two listeners. Here, the two target sound source positions are set so as to satisfy a following condition, T1<T2≦T3<T4.
    Type: Application
    Filed: June 5, 2003
    Publication date: February 19, 2004
    Inventors: Hiroyuki Hashimoto, Kenichi Terai, Isao Kakuhari, Takahisa Hachuda