Patents by Inventor Sentaro Tsuji

Sentaro Tsuji 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: 4789906
    Abstract: An apparatus for processing a video signal to be recorded having a pre-emphasis circuit for pre-emphasizing a signal component with a first predetermined frequency band in the video signal to produce a pre-emphasized video signal, a modulating circuit for frequency modulating a carrier with the pre-emphasized video signal to be recorded, an extracting circuit for extracting a signal component with a second frequency band within the first predetermined frequency band and having a level higher than a threshold level from the video signal, a multiplier for multiplying the outputs of the modulating circuit and the extracting circuit, whereby the amplitude of the frequency modulated signal from the modulating circuit at the portion when the extracted signal is obtained is higher than at the rest of the portion, and a recording amplifier for amplifying the output of the multiplier.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: December 6, 1988
    Assignee: Sony Corporation
    Inventors: Kaoru Urata, Sentaro Tsuji