Patents by Inventor Koichi Ishizaki

Koichi Ishizaki 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: 10334365
    Abstract: An acoustic processing device includes: a plurality of loudspeaker units that output sound; and a mechanism that is configured to be capable of changing a distance between the loudspeaker units.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: June 25, 2019
    Assignee: YAMAHA CORPORATION
    Inventors: Kenji Iwamoto, Satsuki Kawahashi, Koichi Ishizaki, Ryuichiro Kuroki, Naoyuki Onozawa
  • Publication number: 20180279047
    Abstract: An acoustic processing device includes: a plurality of loudspeaker units that output sound; and a mechanism that is configured to be capable of changing a distance between the loudspeaker units.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 27, 2018
    Inventors: Kenji IWAMOTO, Satsuki KAWAHASHI, Koichi ISHIZAKI, Ryuichiro KUROKI, Naoyuki ONOZAWA
  • Publication number: 20180279045
    Abstract: A loudspeaker device includes: an output control unit that causes a sound to be output from a loudspeaker in a case where a headphone device and the loudspeaker device are connected to each other. The sound is generated based on sound data transmitted from the headphone device that has received the sound data through wireless communication from a sound output device. The headphone device is configured to output a sound from a headphone.
    Type: Application
    Filed: February 21, 2018
    Publication date: September 27, 2018
    Inventors: Satsuki KAWAHASHI, Kenji IWAMOTO, Koichi ISHIZAKI, Ryuichiro KUROKI, Naoyuki ONOZAWA
  • Publication number: 20160104469
    Abstract: A musical-performance analysis device includes: an acquisition section that acquires performance information of a player; a determination section that determines, by comparing the performance information acquired by the acquisition section with reference information indicating a reference of a performance, among performance segments different from one another, a performance segment in which a difference degree between the performance information acquired by the acquisition section and the reference information is large and a performance segment in which the difference degree between the performance information acquired by the acquisition section and the reference information is small; and the specification section that specifies a tendency of the performance on the basis of the difference degree of the performance segment in which the difference degree has been determined to be small by the determination section.
    Type: Application
    Filed: May 23, 2014
    Publication date: April 14, 2016
    Inventors: Yu TAKAHASHI, Yoshitaka URATANI, Fukutaro OKUYAMA, Taro KAWABATA, Koichi ISHIZAKI, Dan SASAI, Yoshinari NAKAMURA, Daichi WATANABE, Risa KOMURO
  • Publication number: 20110168154
    Abstract: Door packing (35) having a base (36), a first lip (37), and a second lip (38) is stretched around periphery of a back surface cover (31) of a door (30). When the door (30) is closed, the second lip (38) is inserted into a heating chamber (22), the first lip (37) pivots in directions of arrows (A) once an extremity of the first lip (37) comes into contact with a front face panel (40), and an extremity of the second lip (38) is then brought into close contact with inner wall surfaces of the heating chamber (22). Thus both the front face panel (40) and the inner wall surfaces of the heating chamber (22) are sealed, so that smoke, steam and the like produced by objects to be heated are reliably prevented from leaking out of the heating chamber (22).
    Type: Application
    Filed: September 10, 2009
    Publication date: July 14, 2011
    Inventor: Koichi Ishizaki
  • Patent number: 7332670
    Abstract: An automatic player reenacts a music passage on an acoustic piano without any fingering of a human player; solenoid-operated key actuators and a solenoid-operated pedal actuator is provided for the keys and damper pedal; the automatic player makes the damper pedal travel along a simulative pedal trajectory, and the central processing unit stores pieces of control data expressing the pedal stroke together with the amount of mean current supplied to the solenoid-operated pedal actuator; the central processing unit analyzes the pieces of control data so as to determine an entry point of half pedal section and an exit point of the half pedal section, and specifies a target half point in the half pedal section; while reenacting a music passage, the automatic player brings the damper pedal to the half point so as to reproduce the half pedal state, exactly.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: February 19, 2008
    Assignee: Yamaha Corporation
    Inventors: Yuji Fujiwara, Koichi Ishizaki
  • Patent number: 7238873
    Abstract: An automatic player piano is equipped with solenoid-operated pedal actuators for driving the pedals in a playback; since a large quantity of induction is coupled to the solenoid, the driving signal is delayed due to long time constant so that the pedals behave differently from those in the original performance; a controller, which is incorporated in the automatic player, firstly determines a target mean current of the driving signal to be theoretically required for the reproduction of the pedal motion, and a temporary means current twice as much as the target mean current at the maximum; the controller supplies the driving signal at the temporary mean current to the solenoid in an early stage of each cycle, and, thereafter, recovers the driving signal to the target mean current so that the pedal motion becomes close to that in the original performance.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: July 3, 2007
    Assignee: Yamaha Corporation
    Inventors: Yuji Fujiwara, Yasuhiko Ohba, Koichi Ishizaki
  • Publication number: 20060021488
    Abstract: An automatic player reenacts a music passage on an acoustic piano without any fingering of a human player; solenoid-operated key actuators and a solenoid-operated pedal actuator is provided for the keys and damper pedal; the automatic player makes the damper pedal travel along a simulative pedal trajectory, and the central processing unit stores pieces of control data expressing the pedal stroke together with the amount of mean current supplied to the solenoid-operated pedal actuator; the central processing unit analyzes the pieces of control data so as to determine an entry point of half pedal section and an exit point of the half pedal section, and specifies a target half point in the half pedal section; while reenacting a music passage, the automatic player brings the damper pedal to the half point so as to reproduce the half pedal state, exactly.
    Type: Application
    Filed: June 27, 2005
    Publication date: February 2, 2006
    Applicant: Yamaha Corporation
    Inventors: Yuji Fujiwara, Koichi Ishizaki
  • Publication number: 20050211049
    Abstract: An automatic player piano is equipped with solenoid-operated pedal actuators for driving the pedals in a playback; since a large quantity of induction is coupled to the solenoid, the driving signal is delayed due to long time constant so that the pedals behave differently from those in the original performance; a controller, which is incorporated in the automatic player, firstly determines a target mean current of the driving signal to be theoretically required for the reproduction of the pedal motion, and a temporary means current twice as much as the target mean current at the maximum; the controller supplies the driving signal at the temporary mean current to the solenoid in an early stage of each cycle, and, thereafter, recovers the driving signal to the target mean current so that the pedal motion becomes close to that in the original performance.
    Type: Application
    Filed: February 9, 2005
    Publication date: September 29, 2005
    Applicant: Yamaha Corporation
    Inventors: Yuji Fujiwara, Yasuhiko Ohba, Koichi Ishizaki