Patents by Inventor Yasuo Morooka
Yasuo Morooka 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: 8666733Abstract: When encoding an audio signal, it is possible to efficiently encode the audio signal while maintaining high register signal components, and prevent deterioration of sound quality of decoded signal. A digital audio signal is divided into a plurality of frequency bands. The digital audio signal having been divided into each band is function-approximated for each divided band. Further, parameters of function having been function-approximated are encoded. When performing decoding process, parameters of the function of each band are used to perform function interpolation, synthesize the function-interpolated signal of each band interpolated, and decode the signal. Thus, when function-approximating each band, by suitably setting the function equation, it is possible to perform an encoding process while maintaining the high register components and perform a compression-coding process which enables reproduction with very good sound quality.Type: GrantFiled: June 3, 2009Date of Patent: March 4, 2014Assignee: Japan Science and Technology AgencyInventors: Kazuo Toraichi, Mitsuteru Nakamura, Yasuo Morooka
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Patent number: 8594343Abstract: There is provided a sound processing apparatus and a sound processing method which are capable of reproducing discrete data with a high-quality sound matching users' preferences. In a sound processing means 2, since an interpolation value reflecting a value of a variable parameter ? by which the value of a control sampling function c0(t) is multiplied can be calculated, an analog signal obtained through the interpolation performed in a sampling function sN(t) can be regulated in accordance with the variable parameter ? by changing the value of the variable parameter ?. In this way, by allowing the user to appropriately change the variable parameter ? in accordance with various conditions including music reproduction environments, sound sources, musical tones and so on, it becomes possible to reproduce high-quality-sound music in which its frequency characteristics of the analog signal have changed and a high quality desired by the user is obtained.Type: GrantFiled: May 1, 2009Date of Patent: November 26, 2013Assignee: Japan Science and Technology AgencyInventors: Kazuo Toraichi, Masakazu Higuchi, Yasuo Morooka, Mitsuaki Nakamura
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Publication number: 20120033830Abstract: There is provided a sound processing apparatus and a sound processing method which are capable of reproducing discrete data with a high-quality sound matching users' preferences. In a sound processing means 2, since an interpolation value reflecting a value of a variable parameter ? by which the value of a control sampling function c0(t) is multiplied can be calculated, an analog signal obtained through the interpolation performed in a sampling function sN(t) can be regulated in accordance with the variable parameter ? by changing the value of the variable parameter ?. In this way, by allowing the user to appropriately change the variable parameter ? in accordance with various conditions including music reproduction environments, sound sources, musical tones and so on, it becomes possible to reproduce high-quality-sound music in which its frequency characteristics of the analog signal have changed and a high quality desired by the user is obtained.Type: ApplicationFiled: May 1, 2009Publication date: February 9, 2012Inventors: Kazuo Toraichi, Masakazu Higuchi, Yasuo Morooka, Mitsuaki Nakamura
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Publication number: 20110106547Abstract: When encoding an audio signal, it is possible to efficiently encode the audio signal while maintaining high register signal components, and prevent deterioration of sound quality of decoded signal. A digital audio signal is divided into a plurality of frequency bands. The digital audio signal having been divided into each band is function-approximated for each divided band. Further, parameters of function having been function-approximated are encoded. When performing decoding process, parameters of the function of each band are used to perform function interpolation, synthesize the function-interpolated signal of each band interpolated, and decode the signal. Thus, when function-approximating each band, by suitably setting the function equation, it is possible to perform an encoding process while maintaining the high register components and perform a compression-coding process which enables reproduction with very good sound quality.Type: ApplicationFiled: June 3, 2009Publication date: May 5, 2011Applicant: Japan Science and Technology AgencyInventors: Kazuo Toraichi, Mitsuteru Nakamura, Yasuo Morooka
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Patent number: 7773007Abstract: A signal processing device which outputs a discrete signal composed of a string of the sampling values and parameters m signal. The signal processing device includes a sampling circuit which samples an input signal and outputs a discrete signal, multiple function generators which generate multiple sampling functions with parameters m different from each other, plural inner product operating units for each of parameters m that take an inner product between the input signal and each of plural sampling functions and output an inner product operating value, and a judging unit which determines parameter m providing a minimum error out of multiple errors composed of differences between the sampling value and inner product operating values output from the multiple inner product operating units and outputs the parameters m signal.Type: GrantFiled: June 17, 2008Date of Patent: August 10, 2010Assignee: Japan Science and Technolgoy AgencyInventors: Kazuo Toraichi, Kazuki Katagishi, Kouji Nakamura, Yasuo Morooka
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Patent number: 7652610Abstract: A signal processing device which outputs a discrete signal composed of a string of the sampling values and parameters m signal. The signal processing device includes a sampling circuit which samples an input signal and outputs a discrete signal, multiple function generators which generate multiple sampling functions with parameters m different from each other, plural inner product operating units for each of parameters m that take an inner product between the input signal and each of plural sampling functions and output an inner product operating value, and a judging unit which determines parameter m providing a minimum error out of multiple errors composed of differences between the sampling value and inner product operating values output from the multiple inner product operating units and outputs the parameters m signal.Type: GrantFiled: June 17, 2008Date of Patent: January 26, 2010Assignee: Japan Science and Technology AgencyInventors: Kazuo Toraichi, Kazuki Katagishi, Kouji Nakamura, Yasuo Morooka
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Patent number: 7463172Abstract: A signal processing device which outputs a discrete signal composed of a string of the sampling values and parameters m signal. The signal processing device includes a sampling circuit which samples an input signal and outputs a discrete signal, multiple function generators which generate multiple sampling functions with parameters m different from each other, plural inner product operating units for each of parameters m that take an inner product between the input signal and each of plural sampling functions and output an inner product operating value, and a judging unit which determines parameter m providing a minimum error out of multiple errors composed of differences between the sampling value and inner product operating values output from the multiple inner product operating units and outputs the parameters.Type: GrantFiled: March 3, 2005Date of Patent: December 9, 2008Assignee: Japan Science and Technology AgencyInventors: Kazuo Toraichi, Kazuki Katagishi, Kouji Nakamura, Yasuo Morooka
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Publication number: 20080258958Abstract: A signal processing device which outputs a discrete signal composed of a string of the sampling values and parameters m signal. The signal processing device includes a sampling circuit which samples an input signal and outputs a discrete signal, multiple function generators which generate multiple sampling functions with parameters m different from each other, plural inner product operating units for each of parameters m that take an inner product between the input signal and each of plural sampling functions and output an inner product operating value, and a judging unit which determines parameter m providing a minimum error out of multiple errors composed of differences between the sampling value and inner product operating values output from the multiple inner product operating units and outputs the parameters m signal.Type: ApplicationFiled: June 17, 2008Publication date: October 23, 2008Inventors: Kazuo Toraichi, Kazuki Katagishi, Kouji Nakamura, Yasuo Morooka
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Publication number: 20080258955Abstract: A signal processing device which outputs a discrete signal composed of a string of the sampling values and parameters m signal. The signal processing device includes a sampling circuit which samples an input signal and outputs a discrete signal, multiple function generators which generate multiple sampling functions with parameters m different from each other, plural inner product operating units for each of parameters m that take an inner product between the input signal and each of plural sampling functions and output an inner product operating value, and a judging unit which determines parameter m providing a minimum error out of multiple errors composed of differences between the sampling value and inner product operating values output from the multiple inner product operating units and outputs the parameters m signal.Type: ApplicationFiled: June 17, 2008Publication date: October 23, 2008Inventors: Kazuo Toraichi, Kazuki Katagishi, Kouji Nakamura, Yasuo Morooka
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Publication number: 20070285295Abstract: There is provided a new signal processing device that uses functions appropriate to signal properties to acquire high-quality signals. The signal processing device includes a sampling circuit 2 that samples an input signal and outputs a discrete signal, multiple function generators 3 that generate multiple sampling functions with parameters m different from each other, plural inner product operating units 4 for each of the parameters m that take an inner product between the input signal and each of plural sampling functions and output an inner product operating value, and a judging unit 8 that determines parameter m providing a minimum error out of multiple errors composed of differences between the sampling value and inner product operating values output from the multiple inner product operating units and outputs the parameter m signal. The signal processing device outputs a discrete signal composed of a string of the sampling values and the parameter m signal.Type: ApplicationFiled: March 3, 2005Publication date: December 13, 2007Inventors: Kazuo Toraichi, Kazuki Katagishi, Kouji Nakamura, Yasuo Morooka
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Patent number: 7138734Abstract: In order to reduce load supported by a support mechanism for supporting a movable part so as to prevent the movable part from moving in a horizontal direction when stress is generated thereon in the horizontal direction, there is provided a drive unit including a primary side having a magnetic body around which a coil is wound, and a secondary side having a plurality of permanent magnets, the primary side including magnetic poles and step portions provided on the magnetic poles. The width of each step portion is smaller than the width of each permanent magnet.Type: GrantFiled: May 10, 2005Date of Patent: November 21, 2006Assignee: Hitachi, Ltd.Inventors: Houng Joong Kim, Kohji Maki, Yasuo Morooka, Isamu Numata, Hisao Tadokoro, Takeo Morimoto, Yasunori Sannohe, Hiroshi Ueno, Hideki Shimane
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Patent number: 7105964Abstract: An electric rotating machine has a rotor, a stator and a casing. A planetary roller mechanism constituted by a sun roller, a planet roller, a ring roller and a carrier is provided within the rotor so as to transmit the driving force of the rotor to the outside from a power shaft. Oil is sealed within the rotor or the casing. The planetary roller mechanism may be provided within the casing or at the outside of the rotor and, in this case, oil is sealed within the casing.Type: GrantFiled: August 28, 2002Date of Patent: September 12, 2006Assignees: Hitachi, Ltd., Sumitomo Heavy Industries, Ltd.Inventors: Taizo Miyazaki, Yasuo Morooka, Kiyoji Minegishi, Jun Tamenaga
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Patent number: 6995480Abstract: Power supply equipment for a motor vehicle, includes a motor generator, an inverter for driving the motor generator, a battery and a capacitor of an electrical double layer, wherein the capacitor is directly connected to a DC side of the inverter and the battery is connected in parallel with the capacitor via a first switching unit. When an engine is started up, the power stored in the capacitor is used, and the switching units are turned off to separate the battery from the start-up of the engine.Type: GrantFiled: December 9, 2004Date of Patent: February 7, 2006Assignee: Hitachi, Ltd.Inventors: Masahiko Amano, Yasuo Morooka, Taizo Miyazaki, Tomoyuki Hanyu
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Patent number: 6979977Abstract: A power controller for a vehicle controls the supply of power to an electrical load when the vehicle's engine is stopped or a key switch is turned off, so as to prevent lowering of the remaining capacity of a main battery. The control system has a control portion which controls operation of a power generator and an electrical load mounted on an automotive vehicle. The control system also includes remaining capacity measuring means for measuring the remaining capacity of a battery. The control portion drives a predetermined power load when the engine is stopped or when a key switch is held OFF, and operation of the power load is stopped when a remaining capacity of the battery measured by the remaining capacity measuring means becomes smaller than a predetermined value.Type: GrantFiled: June 15, 2004Date of Patent: December 27, 2005Assignee: Hitachi, Ltd.Inventors: Masahiko Amano, Ryoso Masaki, Yasuo Morooka
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Publication number: 20050200209Abstract: In order to reduce load supported by a support mechanism for supporting a movable part so as to prevent the movable part from moving in a horizontal direction when stress is generated thereon in the horizontal direction, there is provided a drive unit including a primary side having a magnetic body around which a coil is wound, and a secondary side having a plurality of permanent magnets, the primary side including magnetic poles and step portions provided on the magnetic poles. The width of each step portion is smaller than the width of each permanent magnet.Type: ApplicationFiled: May 10, 2005Publication date: September 15, 2005Inventors: Houng Kim, Kohji Maki, Yasuo Morooka, Isamu Numata, Hisao Tadokoro, Takeo Morimoto, Yasunori Sannohe, Hiroshi Ueno, Hideki Shimane
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Publication number: 20050093370Abstract: Power supply equipment for a motor vehicle, comprising a motor generator, an inverter for driving said motor generator, a battery and a capacitor of an electrical double layer, wherein the capacitor is directly connected to a DC side of the inverter and the battery is connected in parallel with the capacitor via a first switching unit. When an engine is started up, the power stored in the capacitor is used, and the switching units are turned off to separate the battery from the start-up of the engine.Type: ApplicationFiled: December 9, 2004Publication date: May 5, 2005Applicant: Hitachi, Ltd.Inventors: Masahiko Amano, Yasuo Morooka, Taizo Miyazaki, Tomoyuki Hanyu
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Patent number: 6876108Abstract: Disclosed herewith a compact linear motor provided with a plurality of magnetic pole teeth and used to increase the thrust force by canceling a magnetic attractive force working between the primary member and the secondary member. The linear motor comprises a primary member and a secondary member. The primary member includes cores formed with a magnetic material and an electromagnetic coil wound on the cores while the secondary member supported so as to be capable of moving relatively with respect to the primary member with a gap therebetween. In the linear motor, the coil that is wound commonly on the cores is also disposed between adjacent magnetic pole teeth.Type: GrantFiled: August 20, 2003Date of Patent: April 5, 2005Assignee: Hitachi, Ltd.Inventors: Kohji Maki, Houng Joong Kim, Yasuo Morooka, Keijirou Sakai, Hitoshi Shibata, Hideki Shimane, Hisao Tadokoro, Takashi Kobayashi
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Patent number: 6861767Abstract: Power supply equipment for a motor vehicle, includes a motor generator, an inverter for driving the motor generator, a battery and a capacitor of an electrical double layer. The capacitor is directly connected to a DC side of the inverter and the battery is connected in parallel with the capacitor via a first switching unit. When an engine is started up, the power stored in the capacitor is used, and the switching units are turned off to separate the battery from the start-up of the engine.Type: GrantFiled: August 30, 2001Date of Patent: March 1, 2005Assignee: Hitachi, Ltd.Inventors: Masahiko Amano, Yasuo Morooka, Taizo Miyazaki, Tomoyuki Hanyu
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Publication number: 20040232881Abstract: A power controller for a vehicle can operate electrical load upon stopping of engine or turning OFF of a key switch, and lowering of remaining capacity of a main battery can be prevented. The control system has a control portion controlling operation of a power generator and an electrical load mounted on an automotive vehicle. The control system also includes remaining capacity measuring means for measuring a remaining capacity of a battery. The control portion drives a predetermined power load when an engine is stopped or a key switch is held OFF, and operation of the power load is stopped when a remaining capacity of the battery measured by the remaining capacity measuring means becomes smaller than a predetermined value.Type: ApplicationFiled: June 15, 2004Publication date: November 25, 2004Applicant: Hitachi, Ltd.Inventors: Masahiko Amano, Ryoso Masaki, Yasuo Morooka
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Patent number: 6808468Abstract: A composite power transmission mechanism 10, comprising the combination of a planetary gear unit 15 and a differential planetary gear mechanism 16, wherein a planetary gear is connected with a drive shaft of a vehicle, while other three gears let the shafts of the motor 12, a motor 13 and an engine 11 rotate respectively. The drive shaft of the vehicle is made to rotate by means of the planetary gear of the composite power transmission mechanism; since the rotation of different sources of a driving force, i.e., those of the motor 12, the motor 13 and the engine 11, can be transmitted to one another by only one meshing of the gears, the mechanical loss that is dependent on the number of times of the meshing of the gears can be reduced to a minimum.Type: GrantFiled: September 26, 2002Date of Patent: October 26, 2004Assignee: Hitachi, Ltd.Inventors: Taizo Miyazaki, Tomoyuki Haniu, Ryoso Masaki, Masahiko Amano, Yasuo Morooka