Patents by Inventor Yasuhiro Terada
Yasuhiro Terada 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).
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Patent number: 9264797Abstract: A directional microphone includes: a microphone which generates a first acoustic signal that has sensitivity in a target direction; a microphone which generates a second acoustic signal that has a blind spot in sensitivity in the target direction; a correction unit which multiplies, in a frequency domain, the second acoustic signal by the first acoustic signal N times, where N is greater than zero, to generate a third acoustic signal which includes the second acoustic signal that has a narrowed angular range of the blind spot in sensitivity in the target direction; and a suppression unit which performs noise suppression using the first acoustic signal as a main signal and the third acoustic signal generated as a reference signal, to generate an output acoustic signal which is the first acoustic signal that has narrowed directivity in the target direction.Type: GrantFiled: December 19, 2013Date of Patent: February 16, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takeo Kanamori, Yasuhiro Terada
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Publication number: 20150016629Abstract: A directional microphone includes: a microphone which generates a first acoustic signal that has sensitivity in a target direction; a microphone which generates a second acoustic signal that has a blind spot in sensitivity in the target direction; a correction unit which multiplies, in a frequency domain, the second acoustic signal by the first acoustic signal N times, where N is greater than zero, to generate a third acoustic signal which includes the second acoustic signal that has a narrowed angular range of the blind spot in sensitivity in the target direction; and a suppression unit which performs noise suppression using the first acoustic signal as a main signal and the third acoustic signal generated as a reference signal, to generate an output acoustic signal which is the first acoustic signal that has narrowed directivity in the target direction.Type: ApplicationFiled: December 19, 2013Publication date: January 15, 2015Inventors: Takeo Kanamori, Yasuhiro Terada
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Patent number: 8879749Abstract: A directional microphone apparatus and directivity control method that corrects a level difference and a phase difference generated in a low band in a plurality of non-directional microphone units, improve the directivity, and reduce the size are provided. Level difference calculation section (105) calculates the level difference between first signal x1(t) obtained by first non-directional microphone unit (101) and second signal x2(t) obtained by second non-directional microphone unit (102), and correction parameter calculation section (106) calculates coefficients of a linear IIR filter configuring correction process section (103) based on the level difference. Correction process section (103) simultaneously corrects the level difference and a phase difference in the low band between two non-directional microphone units by using the calculated coefficients.Type: GrantFiled: June 16, 2011Date of Patent: November 4, 2014Assignee: Panasonic CorporationInventors: Yasuhiro Terada, Takeo Kanamori
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Patent number: 8824700Abstract: A power spectrum estimation unit (200) obtains an estimated sound power spectrum Ps(?), based on a power spectrum P1(?) and on a first calculated value obtained by at least multiplying a power spectrum P2(?) by a weight coefficient A2(?). A coefficient update unit (300) updates the weight coefficient A2(?) and a weight coefficient A1(?) so that a second calculated value approximates to the power spectrum P1(?). The second calculated value is obtained by adding at least two values obtained by multiplying the power spectrum P2(?) and the estimated target sound power spectrum Ps(?) by the weight coefficient A2(?) and the weight coefficient A1(?), respectively.Type: GrantFiled: July 26, 2011Date of Patent: September 2, 2014Assignee: Panasonic CorporationInventors: Takeo Kanamori, Shinichi Yuzuriha, Yutaka Banba, Yasuhiro Terada
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Patent number: 8755546Abstract: A sound processing apparatus, a sound processing method and a hearing aid efficiently emphasize the sound of an utterer regardless of the distance between microphones. The sound processing apparatus outputs a first directivity signal in which the main axis of directivity is formed in the direction of the utterer and outputs a second directivity signal in which the dead zone of directivity is formed in the direction of the utterer. The sound processing apparatus calculates the level of the first directivity signal and the level of the second directivity signal, and determines the distance to the utterer based on the level of the first directivity signal and the level of the second directivity signal. The sound processing apparatus derives a gain to be given to the first directivity signal according to the result of the determination and controls the level of the first directivity signal by using the gain.Type: GrantFiled: October 20, 2010Date of Patent: June 17, 2014Assignee: Pansonic CorporationInventors: Yasuhiro Terada, Maki Yamada
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Patent number: 8340867Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.Type: GrantFiled: April 28, 2011Date of Patent: December 25, 2012Assignee: Honda Motor Co., Ltd.Inventors: Kouhei Maruyama, Yasuhiro Terada, Yutaka Horiuchi, Nobuo Sugitani, Takashi Yanagi
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Publication number: 20120189147Abstract: By using output signals from a plurality of omnidirectional microphones, respectively, the sound processing apparatus outputs a first directivity signal in which the main axis of directivity is formed in the direction of the utterer and outputs a second directivity signal in which the dead zone of directivity is formed in the direction of the utterer. The sound processing apparatus calculates the level of the first directivity signal and the level of the second directivity signal, and determines the distance to the utterer based on the level of the first directivity signal and the level of the second directivity signal. The sound processing apparatus derives a gain to be given to the first directivity signal according to the result of the determination and controls the level of the first directivity signal by using the gain.Type: ApplicationFiled: October 20, 2010Publication date: July 26, 2012Inventors: Yasuhiro Terada, Maki Yamada
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Publication number: 20120177223Abstract: A power spectrum estimation unit (200) obtains an estimated sound power spectrum Ps(?), based on a power spectrum P1(?) and on a first calculated value obtained by at least multiplying a power spectrum P2(?) by a weight coefficient A2(?). A coefficient update unit (300) updates the weight coefficient A2(?) and a weight coefficient A1(?) so that a second calculated value approximates to the power spectrum P1(?). The second calculated value is obtained by adding at least two values obtained by multiplying the power spectrum P2(?) and the estimated target sound power spectrum Ps(?) by the weight coefficient A2(?) and the weight coefficient A1(?), respectively.Type: ApplicationFiled: July 26, 2011Publication date: July 12, 2012Inventors: Takeo Kanamori, Shinichi Yuzuriha, Yutaka Banba, Yasuhiro Terada
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Publication number: 20120140948Abstract: A directional microphone apparatus and directivity control method that corrects a level difference and a phase difference generated in a low band in a plurality of non-directional microphone units, improve the directivity, and reduce the size are provided. Level difference calculation section (105) calculates the level difference between first signal x1(t) obtained by first non-directional microphone unit (101) and second signal x2(t) obtained by second non-directional microphone unit (102), and correction parameter calculation section (106) calculates coefficients of a linear IIR filter configuring correction process section (103) based on the level difference. Correction process section (103) simultaneously corrects the level difference and a phase difference in the low band between two non-directional microphone units by using the calculated coefficients.Type: ApplicationFiled: June 16, 2011Publication date: June 7, 2012Applicant: PANASONIC CORPORATIONInventors: Yasuhiro Terada, Takeo Kanamori
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Publication number: 20110202239Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.Type: ApplicationFiled: April 28, 2011Publication date: August 18, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Kouhei Maruyama, Yasuhiro Terada, Yutaka Horiuchi, Nobuo Sugitani, Takashi Yanagi
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Patent number: 7954827Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.Type: GrantFiled: February 8, 2008Date of Patent: June 7, 2011Assignee: Honda Motor Co., Ltd.Inventors: Kouhei Maruyama, Yasuhiro Terada, Yutaka Horiuchi, Nobuo Sugitani, Takashi Yanagi
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Patent number: 7814808Abstract: Worm gear mechanism includes a driving worm, a torque delivering worm wheel meshing with the worm, and an auxiliary worm wheel superimposed on the torque delivering worm wheel. The auxiliary worm wheel has a pitch diameter greater than that of the torque delivering worm wheel. The auxiliary worm wheel is biased against the driving worm wheel via a biasing member in the form of a leaf spring.Type: GrantFiled: April 26, 2005Date of Patent: October 19, 2010Assignee: Honda Motor Co., Ltd.Inventors: Yasuo Shimizu, Katsuji Watanabe, Takahiro Aoki, Yasuhiro Terada, Ryoji Toyofuku
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Patent number: 7766350Abstract: A telescopic actuator is adapted to be used on a right side or a left side of a body. The telescopic actuator includes a housing having a cylindrical shape and formed with an opening portion, an output rod supported inside the housing so as to be protrudable and retractable with respect to the housing, and a stroke sensor comprising a detectable portion provided on the output rod so as to be movable inside the opening portion of the housing and a detecting portion provided on the housing so as to face the detectable portion. A direction in which the detectable portion is eccentrically disposed with respect to a vertical plane including an axial line of the output rod is different depending on whether the telescopic actuator is used on the right side or on the left side of the body.Type: GrantFiled: December 26, 2007Date of Patent: August 3, 2010Assignee: Honda Motor Co., Ltd.Inventors: Yasuhiro Terada, Hajime Kajiwara, Takehiko Hakui, Kotaro Yamaguchi
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Publication number: 20090303350Abstract: It is an object of the present invention to provide a multi-channel sound collecting apparatus, a multi-channel sound reproducing apparatus, and a multi-channel sound collecting and reproducing apparatus for storing into a storage medium sound signals and a zoom control signal in synchronization with the time at which the imaging device is zoom-operated and the time at which the multi-channel sound collecting unit collects the sounds and capable of controlling the sound signals in accordance with the zoom control signal when the sounds are reproduced.Type: ApplicationFiled: May 30, 2006Publication date: December 10, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventor: Yasuhiro Terada
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Publication number: 20080196966Abstract: A steering controller for an electric power steering device 110 includes a base signal computing part 51 for computing a base signal DT in accordance with at least the steering torque; a damper compensation signal computing part 52 for computing a damper compensation signal in accordance with an angular velocity of an electric motor 4 or a speed of steering wheel turn; and an inertia compensation signal computing part 53 for compensating inertia and viscosity in the steering unit. The electric motor is driven by a target signal IM1 obtained by compensating the base signal with a damper compensation signal and an inertia compensation signal, to provide a steering auxiliary force. The target signal of the auxiliary torque is compensated so that a difference between a reference self-aligning torque of front wheel in a front wheel steering vehicle and a self-aligning torque of front wheel in an all-wheel steering vehicle is provided to a driver as a responsive feeling from the steering torque.Type: ApplicationFiled: February 8, 2008Publication date: August 21, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Kouhei Maruyama, Yasuhiro Terada, Yutaka Horiuchi, Nobuo Sugitani, Takashi Yanagi
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Publication number: 20080157497Abstract: A telescopic actuator is adapted to be used on a right side or a left side of a body. The telescopic actuator includes a housing having a cylindrical shape and formed with an opening portion, an output rod supported inside the housing so as to be protrudable and retractable with respect to the housing, and a stroke sensor comprising a detectable portion provided on the output rod so as to be movable inside the opening portion of the housing and a detecting portion provided on the housing so as to face the detectable portion. A direction in which the detectable portion is eccentrically disposed with respect to a vertical plane including an axial line of the output rod is different depending on whether the telescopic actuator is used on the right side or on the left side of the body.Type: ApplicationFiled: December 26, 2007Publication date: July 3, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Yasuhiro Terada, Hajime Kajiwara, Takehiko Hakui, Kotaro Yamaguchi
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Patent number: 7190800Abstract: A howling control apparatus and howling control method for controlling time up to the cancellation of howling suppression according to a howling occurrence situation, thereby eliminating the repetition of howling suppression and cancellation. A howling detecting section (104) detects howling based on the band level and the band level average value and measures time for which no howling occurs, a waiting time setting section (105) decides waiting time to be set this time from time for which no howling occurs and a previous waiting time, and a gain control section (106) causes a gain that is set to a howling suppressing section (107) to be retuned to a normal value during the waiting time.Type: GrantFiled: March 12, 2003Date of Patent: March 13, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiro Terada, Atsunobu Murase
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Patent number: 6976556Abstract: Electric power steering apparatus includes an electric motor for producing steering assist torque corresponding to steering torque applied to a steering system, and a worm gear mechanism for transmitting the steering assist torque to the steering system. The worm of the worm gear mechanism has a pressure angle greater than a pressure angle of the worm wheel, so as to reduce an actual meshing pitch circle diameter of the worm in the worm gear mechanism.Type: GrantFiled: July 11, 2003Date of Patent: December 20, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuo Shimizu, Katsuji Watanabe, Yasuhiro Terada
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Publication number: 20050235768Abstract: Worm gear mechanism includes a driving worm, a torque delivering worm wheel meshing with the worm, and an auxiliary worm wheel superimposed on the torque delivering worm wheel. The auxiliary worm wheel has a pitch diameter greater than that of the torque delivering worm wheel. The auxiliary worm wheel is biased against the driving worm wheel via a biasing member in the form of a leaf spring.Type: ApplicationFiled: April 26, 2005Publication date: October 27, 2005Applicant: HONDA MOTOR CO., LTD.Inventors: Yasuo Shimizu, Katsuji Watanabe, Takahiro Aoki, Yasuhiro Terada, Ryoji Toyofuku
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Patent number: 6832662Abstract: An electric power steering apparatus with an electric motor generating an assistant steering force for transmission to the steering system, a worm shaft rotated by the electric motor, a worm gear on the worm shaft that rotates therewith, a worm wheel rotated by the worm gear, a pinion shaft that rotates with the worm gear, supporting units that support both ends of the worm shaft so as to allow rotation thereof, and a distortion prevention unit that prevents distortion of the worm shaft. The supporting units may support the ends of the worm shaft without play.Type: GrantFiled: October 27, 2003Date of Patent: December 21, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuo Shimizu, Katsuji Watanabe, Yasuhiro Terada