Patents by Inventor Tadashi Takamiya

Tadashi Takamiya 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).

  • Audio signal storing apparatus having a function for converting speech speed
    Patent number: 5717818
    Abstract: The speed of an input speech is changed without any change of the pitch of the input speech. Raw data of a speech are stored so that the speed of the speech can be modulated continuously on the basis of the raw data of the speech. In the speech speed conversion method, a speech speed conversion process for the input speech is carried out in a period designated when speech speed conversion is needed, which the speech speed conversion is not carried out in the other period.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: February 10, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Yoshito Nejime, Yukio Kumagai, Tadashi Takamiya, Yasunori Kawauchi, Nobuo Hataoka, Juichi Morikawa
  • Video signal preamplifier circuit
    Patent number: 4956729
    Abstract: A preamplifier circuit for amplifying a video signal reproduced by a magnetic head includes a positive feedback circuit for reducing an input capacitance thereof. A negative feedback circuit may be added thereto for stabilizing an operation of the preamplifier.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: September 11, 1990
    Assignees: Hitachi, Ltd., Hitachi Video Engineering, Ltd.
    Inventors: Tomishige Yatsugi, Hiroshi Toeda, Tadashi Takamiya, Norio Minami, Isao Fukushima
  • Automatic cassette loading apparatus
    Patent number: 4918549
    Abstract: An automatic cassette loading apparatus in which a tape cassette containing a magnetic tape is held and transported forwardly and returned between a cassette insertion position and a cassette loaded position. The number of switches is reduced by use of a rotary cam and a drive arm, and a drive motor and the switches are combined on the same printed circuit board.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: April 17, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Noboru Katono, Yoshihiro Shibata, Tadashi Takamiya
  • System for compensating jitter of video signal
    Patent number: 4081834
    Abstract: A horizontal synchronizing signal contained in a composite video signal undergoing a phase fluctuation is phase modulated and substituted for the original horizontal synchronizing signal. The phase modulation of the horizontal synchronizing signal of the input signal is effected at a phase modulation circuit and then the phase modulated signal is applied to an AFC circuit unit which has the same transfer characteristic as that of a horizontal AFC circuit of an ordinary television receiver set. The phase modulation circuit is controlled by a signal in response to a phase difference between the output of the AFC circuit unit and the original horizontal synchronizing signal. A composite video signal containing the horizontal synchronizing signal subjected to the phase modulation in this manner is applied to the television receiver set, thereby displaying a picture image free from the fluctuation.
    Type: Grant
    Filed: June 22, 1976
    Date of Patent: March 28, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Takamiya, Yasufumi Yumde