Patents by Inventor Junsuke Tokumitsu

Junsuke Tokumitsu 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: 4635134
    Abstract: A video signal processing apparatus for processing a video signal at the time of a special reproduction mode comprises an A/D converter for converting a reproduced video signal obtained by demodulating a frequency modulated signal reproduced from a recording medium during the special reproduction mode into a first digital video signal, a memory having a memory capacity for at least storing the first digital video signal corresponding to one field, a switching circuit for selectively producing the first digital video signal or a second digital video signal read out from the memory, a first circuit for at least generating a first pulse signal having a pulse width corresponding to a predetermined time period and a second pulse signal which determines the read-out timing of the memory, a second circuit for generating a control signal based on the first and second pulse signals for controlling read-out from the memory and causing the switching circuit to selectively produce the second digital video signal during a
    Type: Grant
    Filed: January 17, 1985
    Date of Patent: January 6, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Kohei Sasamura, Junsuke Tokumitsu
  • Patent number: 4531162
    Abstract: A video signal slow-motion or still picture reproduction system comprises at least one rotary video head for scanning a tape recorded with an FM video signal on tracks formed obliquely with respect to the longitudinal direction of the tape, a drum pulse obtaining circuit for obtaining a drum pulse in phase synchronism with the rotation of the rotary video head, a counting pulse generation circuit for generating a counting pulse in phase synchronism with the rotation of said rotary video head and having a repetition frequency sufficiently high with respect to the drum pulse, a noise detection pulse generation circuit for generating a noise detection pulse having a pulse width equal to a period in which an envelope of the FM video signal reproduced by the reproducing circuit is lower than a predetermined level, when the envelope of the FM video signal reproduced by the reproducing circuit is lower than the predetermined level, a calculation circuit supplied with the drum pulse, the counting pulse, and the noise
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: July 23, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Junsuke Tokumitsu
  • Patent number: 4510535
    Abstract: A magnetic recording and reproducing apparatus comprises first through fourth circuits. The first circuit edits and records a new video signal within a predetermined section of a magnetic tape which is pre-recorded with a video signal and a control signal on respective video and control tracks. The second circuit produces a new control signal having a frequency identical to that of the pre-recorded control signal. The third circuit reproduces the pre-recorded control signal from the tape while the first circuit is operating. The fourth circuit detects the existence of a control signal reproduced by the third circuit, and supplies the new control signal which is produced by the second circuit to the third circuit when the non-existence of the reproduced control signal is detected, so as to record the new control signal on the control track of the tape.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: April 9, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Junsuke Tokumitsu
  • Patent number: 3990789
    Abstract: A series of film-containing cassettes are placed in projecting positions and thereafter in rewinding positions. First and second take-up reels are arranged to be axially movable between first and second positions. An elongate film guide member is movable between an active position in which the guide defines a straight threading path between the cassette occupying the projecting position and the take-up reel occupying the first position and a normally inactive position in which the guide is clear of the threading path. In the film threading mode, the leading end of film is driven through the straight threading path and taken up by the take-up reel. A film handling mechanism is provided between the opposite ends of the threading path. Upon completion of film threading, the movable elongate guide is restored to the inactive position and the film handling mechanism is brought into operation to engage the film with an aperture plate.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: November 9, 1976
    Assignee: Victor Company of Japan, Limited
    Inventors: Takaharu Nishino, Junsuke Tokumitsu, Masao Nozaki, Norimasa Arai, Yoichi Kashida