Patents by Inventor Masami Itoga

Masami Itoga 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).

  • Video image reproducing apparatus which eliminates a noise bar in the image by using a field memory
    Patent number: 5003406
    Abstract: This invention relates to a video image reproducing apparatus operable to reproduce a video image signal recorded on a magnetic tape through a field memory at a different speed from a recording speed. An envelope detecting signal of a reproducing signal from a magnetic head is compared with a reference potential by a comparator in order to automatically control the write timing to the field memory. The reference potential is adjusted based on an output signal of the comparator. The write timing to the field memory is controlled in accordance with an output signal of the comparator which compares the envelope detecting signal with the adjusted reference voltage. The apparatus of the invention is to be used in a video tape recorder.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: March 26, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keiji Hatanaka, Yoshimitsu Nakajima, Masami Itoga