Patents by Inventor Iwao Obata

Iwao Obata 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).

  • Method of detecting motion vector, apparatus therefor, and picture signal processing system utilizing the apparatus
    Patent number: 5436674
    Abstract: An apparatus capable of detecting with improved accuracy a motion vector representing an object moved on a picture plane comprises a memory section for storing an input picture signal renewed for every predetermined time interval, a spatial filter section for applying a spatial band limitation to two signal portions of the renewed picture signal stored in the memory, which signal portions corresponding to the different time intervals, and a detecting section including at least one detecting stage for detecting the motion vector in accordance with the gradient method on the basis of the two picture signals and a minute value to be added to a gradient determined from one reference picture signal represented by one of the two picture signals.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: July 25, 1995
    Assignee: Nippon Hoso Kyokai
    Inventors: Hiroshi Hirabayashi, Yuji Nojiri, Yasuaki Kanatsugu, Shoichi Suzuki, Hajime Sonehara, Junji Kumada, Iwao Obata, Kenji Nakashima