Patents by Inventor Takashi Yamao

Takashi Yamao 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).

  • Publication number: 20250193597
    Abstract: An audio signal processing device includes: an obtainer that obtains an audio signal; a first signal processor that generates, based on the audio signal, a first high-frequency signal including a high-frequency component in a frequency band higher than a first frequency higher than a human hearing range; and an adder that adds the first high-frequency signal to the audio signal to generate an expanded audio signal having an expanded high-frequency range. The first signal processor generates the first high-frequency signal by performing: (i) first signal processing including first clipping processing of clipping the audio signal at a first amplitude; and (ii) first high-pass filter processing of passing an audio signal obtained by the first clipping processing through the frequency band higher than the first frequency.
    Type: Application
    Filed: February 21, 2025
    Publication date: June 12, 2025
    Inventors: Takashi Yamao, Isao Kakuhari, Tadayoshi Okuda
  • Publication number: 20250192743
    Abstract: A reproduction system for content includes: an obtainer that obtains first content corresponding to a first emotion and second content corresponding to a second emotion; and a reproducer that, using a loudspeaker, reproduces the first content together with first inaudible sound that corresponds to the first content and is created by amplifying a basic signal of the first inaudible sound by a first amplification factor, and thereafter reproduces the second content together with second inaudible sound that corresponds to the second content and is created by amplifying a basic signal of the second inaudible sound by a second amplification factor, wherein the reproducer: gradually decreases the first amplification factor of the first inaudible sound being reproduced, during reproduction of the first content; and gradually increases the second amplification factor of the second inaudible sound being reproduced, during reproduction of the second content.
    Type: Application
    Filed: February 25, 2025
    Publication date: June 12, 2025
    Inventors: Takashi YAMAO, Isao Kakuhari, Tadayoshi Okuda
  • Publication number: 20250153570
    Abstract: A vehicle includes a transparent display having a variable transmittance disposed between a rear seat and a front seat. The transparent display plays predetermined video content. The predetermined video content has at least a first phase, a second phase that follows the first phase, a third phase that follows the second phase, and a fourth phase that follows the third phase. At a beginning of the first phase, the variable transmittance of the transparent display is a first transmittance, and at an end of the first phase, the variable transmittance of the transparent display is a second transmittance that is smaller than the first transmittance.
    Type: Application
    Filed: January 16, 2025
    Publication date: May 15, 2025
    Applicant: Panasonic Automotive Systems Co., Ltd.
    Inventors: Takashi YAMAO, Satoshi TSUCHIYA
  • Patent number: 10516374
    Abstract: A class-D amplifier that amplifies an input audio signal includes: a push-pull circuit that has at least two switching transistors; an electric current suppressor that is disposed between the push-pull circuit and a power source that supplies electric power to the push-pull circuit; a switch that is connected in parallel with the electric current suppressor; a determiner that determines whether or not the class-D amplifier is in a state where sound is not emitted; and a controller. When the determiner determines that the class-D amplifier is in a state where sound is not emitted, the controller turns off the switch such that a path for electric current flowing from the power source to the push-pull circuit runs through the electric current suppressor. When the determiner determines that the class-D amplifier is in a state where sound is emitted, the controller turns on the switch such that the path for electric current bypasses the electric current suppressor.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: December 24, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Takashi Yamao
  • Publication number: 20190044487
    Abstract: A class-D amplifier that amplifies an input audio signal includes: a push-pull circuit that has at least two switching transistors; an electric current suppressor that is disposed between the push-pull circuit and a power source that supplies electric power to the push-pull circuit; a switch that is connected in parallel with the electric current suppressor; a determiner that determines whether or not the class-D amplifier is in a state where sound is not emitted; and a controller. When the determiner determines that the class-D amplifier is in a state where sound is not emitted, the controller turns off the switch such that a path for electric current flowing from the power source to the push-pull circuit runs through the electric current suppressor. When the determiner determines that the class-D amplifier is in a state where sound is emitted, the controller turns on the switch such that the path for electric current bypasses the electric current suppressor.
    Type: Application
    Filed: September 26, 2016
    Publication date: February 7, 2019
    Inventor: TAKASHI YAMAO
  • Patent number: 4329440
    Abstract: A process for producing a highly crystalline .alpha.-olefinic polymer in a high yield, which comprises contacting propylene or a mixture of propylene and another .alpha.-olefin with a mixed catalyst system produced by adding a lactone as the third component to a catalyst system consisting essentially of titanium trichloride (1) and a dialkylaluminum halide (2), by which the by-production of the undesired atactic polymer can be decreased.
    Type: Grant
    Filed: August 21, 1979
    Date of Patent: May 11, 1982
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshiyuki Kokubo, Takashi Yamao