Patents by Inventor Mitsutaka Goto
Mitsutaka Goto 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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Publication number: 20230010955Abstract: In a sound processing method of operating audio equipment to perform sound processing relating to audio content in accordance with one embodiment, a distributor terminal communicates with the audio equipment and at least one listener terminal, the distributor terminal distributes the audio content from the distributor terminal to the at least one listener terminal, the distributor terminal specifies an operation listener terminal, from among the at least one listener terminal, that is permitted to change a sound processing parameter of the audio equipment, the operation listener terminal accepts the sound processing parameter changed by the operation listener terminal, the operation listener terminal transmits the sound processing parameter changed by the operation listener terminal to the distributor terminal, and the audio equipment performs the sound processing based on the changed sound processing parameter changed by the operation listener terminal.Type: ApplicationFiled: July 7, 2022Publication date: January 12, 2023Inventors: Hiroshi KOTAKI, Mitsutaka GOTO, Mizuyuki SHIRAI, Akihiro SONOGI, Takahiro SENDA, Hitomi SHIMIZU
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Patent number: 11516605Abstract: An audio device includes a network interface, an amplifier that amplifies an audio signal received through the network interface, and a processor configure to obtain an output value of a signal from the amplifier and sends the output value of the signal through the network interface.Type: GrantFiled: September 16, 2020Date of Patent: November 29, 2022Assignee: YAMAHA CORPORATIONInventor: Mitsutaka Goto
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Patent number: 10985716Abstract: An audio processing device includes: at least one processor configured to: generate a first signal by reducing components that fall below a first frequency in an audio signal; generate a second signal by reducing components that fall below a second frequency that is higher than the first frequency in the audio signal; select between a first state for outputting the first signal and a second state for outputting the second signal; and output one of the selected first or second signal as an output signal; and a class-D amplifier configured to amplify the output signal, in which, the at least one processor is further configured to: determine whether or not a power supply pumping phenomenon exists or a possibility of the power supply pumping phenomenon exists, in a power source that supplies a power supply voltage to the class-D amplifier; and in which, in the selecting between the first state and the second state, the at least one processor is configured to select: the first state in a case where a determinationType: GrantFiled: November 15, 2019Date of Patent: April 20, 2021Assignee: YAMAHA CORPORATIONInventors: Mitsutaka Goto, Kazuhiro Yanaike
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Patent number: 10979834Abstract: An audio signal control circuit includes an impedance calculator, a suppression value setter, a level detector, and a level controller. The impedance calculator is configured to calculate impedance of a speaker from voltage and current of an audio signal to be outputted to the speaker. The suppression value setter is configured to set a suppression value of the audio signal, using the impedance. The level detector is configured to perform level detection using: i) the voltage when the impedance is equal to or more than a switching threshold value, and ii) the current when the impedance is less than the switching threshold value. The level controller is configured to perform level control of the audio signal using: i) a level of a detection signal that has been detected by the level detector, and ii) the suppression value.Type: GrantFiled: December 26, 2019Date of Patent: April 13, 2021Assignee: Yamaha CorporationInventor: Mitsutaka Goto
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Patent number: 10959020Abstract: An audio signal control circuit includes an adjustment signal generator that extracts a frequency band, which includes a frequency at which a frequency band shared by a low-range speaker and a frequency band shared by a high-range speaker overlap each other, to generate an adjustment signal Sck; a high-range outputter that subtracts the adjustment signal Sck from an audio signal Sa to generate a high-range audio signal SaH and outputs it to a high-pass filter; and a low-range outputter that adds the adjustment signal Sck to the audio signal Sa to generate a low-range audio signal SaL and outputs it to a low-pass filter.Type: GrantFiled: December 26, 2019Date of Patent: March 23, 2021Assignee: Yamaha CorporationInventors: Mitsutaka Goto, Ken Iwayama, David Hatmaker
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Publication number: 20200413208Abstract: An audio device includes a network interface, an amplifier that amplifies an audio signal received through the network interface, and a processor configure to obtain an output value of a signal from the amplifier and sends the output value of the signal through the network interface.Type: ApplicationFiled: September 16, 2020Publication date: December 31, 2020Inventor: Mitsutaka GOTO
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Patent number: 10763804Abstract: An audio processing device includes: a signal processing circuit configured to select between a first state for outputting a first signal obtained by reducing components that fall below a first frequency in an audio signal and a second state for outputting a second signal obtained by reducing components that fall below a second frequency in the audio signal, and output one of the selected first or second signal as an output signal, where the second frequency is higher than the first frequency; a class-D amplifier that amplifies the output signal; a processor configured to: determine whether or not an intensity of a low-frequency component in the audio signal exceeds a threshold value; and control the signal processing circuit to select: the first state in a case where a determination result is negative, where the intensity of the low-frequency component in the audio signal is determined to not exceed the threshold value; and the second state in a case where the determination result is affirmative, where the iType: GrantFiled: November 18, 2019Date of Patent: September 1, 2020Assignee: YAMAHA CORPORATIONInventors: Mitsutaka Goto, Kazuhiro Yanaike
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Publication number: 20200213734Abstract: An audio signal control circuit includes an adjustment signal generator that extracts a frequency band, which includes a frequency at which a frequency band shared by a low-range speaker and a frequency band shared by a high-range speaker overlap each other, to generate an adjustment signal Sck; a high-range outputter that subtracts the adjustment signal Sck from an audio signal Sa to generate a high-range audio signal SaH and outputs it to a high-pass filter; and a low-range outputter that adds the adjustment signal Sck to the audio signal Sa to generate a low-range audio signal SaL and outputs it to a low-pass filter.Type: ApplicationFiled: December 26, 2019Publication date: July 2, 2020Inventors: Mitsutaka GOTO, Ken IWAYAMA, David HATMAKER
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Publication number: 20200213793Abstract: An audio signal control circuit includes an impedance calculator, a suppression value setter, a level detector, and a level controller. The impedance calculator is configured to calculate impedance of a speaker from voltage and current of an audio signal to be outputted to the speaker. The suppression value setter is configured to set a suppression value of the audio signal, using the impedance. The level detector is configured to perform level detection using: i) the voltage when the impedance is equal to or more than a switching threshold value, and ii) the current when the impedance is less than the switching threshold value. The level controller is configured to perform level control of the audio signal using: i) a level of a detection signal that has been detected by the level detector, and ii) the suppression value.Type: ApplicationFiled: December 26, 2019Publication date: July 2, 2020Inventor: Mitsutaka GOTO
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Patent number: 10630240Abstract: An amplifier includes a power amplifier that amplifies an input signal, a VI detection circuit that is connected to a rear stage of the power amplifier to detect power of an output signal of the power amplifier, and a controller that turns on the power amplifier when the input signal is inputted to the power amplifier, turns off the power amplifier when the input signal is not inputted to the power amplifier, and turns on the power amplifier when the VI detection circuit detects a voltage that exceeds a predetermined value when the power amplifier is in off state.Type: GrantFiled: August 29, 2018Date of Patent: April 21, 2020Assignee: YAMAHA CORPORATIONInventor: Mitsutaka Goto
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Patent number: 10609482Abstract: A memory previously stores, as reference impedance characteristics, frequency characteristics of impedance of the speaker during a normal operating state of the speaker. During use of the speaker, a detection circuitry detects, as current impedance characteristics, frequency characteristics of impedance of the speaker on the basis of a real-time audio signal being supplied to the speaker. A determination circuitry determines presence/absence of an abnormality of the speaker on the basis of comparison between the detected current impedance characteristics and the stored reference impedance characteristics. Thus, it is possible to check the operation of the speaker based on of the real-time audio signal without using any dedicated test signal. In this way, it is possible to detect presence/absence of an abnormality of the speaker on the basis of a real-time audio signal being supplied to the speaker, for example, during an actual performance in a concert.Type: GrantFiled: September 24, 2018Date of Patent: March 31, 2020Assignee: Yamaha CorporationInventor: Mitsutaka Goto
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Publication number: 20200091877Abstract: An audio processing device includes: a signal processing circuit configured to select between a first state for outputting a first signal obtained by reducing components that fall below a first frequency in an audio signal and a second state for outputting a second signal obtained by reducing components that fall below a second frequency in the audio signal, and output one of the selected first or second signal as an output signal, where the second frequency is higher than the first frequency; a class-D amplifier that amplifies the output signal; a processor configured to: determine whether or not an intensity of a low-frequency component in the audio signal exceeds a threshold value; and control the signal processing circuit to select: the first state in a case where a determination result is negative, where the intensity of the low-frequency component in the audio signal is determined to not exceed the threshold value; and the second state in a case where the determination result is affirmative, where the iType: ApplicationFiled: November 18, 2019Publication date: March 19, 2020Inventors: Mitsutaka GOTO, Kazuhiro YANAIKE
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Publication number: 20200083851Abstract: An audio processing device includes: at least one processor configured to: generate a first signal by reducing components that fall below a first frequency in an audio signal; generate a second signal by reducing components that fall below a second frequency that is higher than the first frequency in the audio signal; select between a first state for outputting the first signal and a second state for outputting the second signal; and output one of the selected first or second signal as an output signal; and a class-D amplifier configured to amplify the output signal, in which, the at least one processor is further configured to: determine whether or not a power supply pumping phenomenon exists or a possibility of the power supply pumping phenomenon exists, in a power source that supplies a power supply voltage to the class-D amplifier; and in which, in the selecting between the first state and the second state, the at least one processor is configured to select: the first state in a case where a determinationType: ApplicationFiled: November 15, 2019Publication date: March 12, 2020Inventors: Mitsutaka GOTO, Kazuhiro YANAIKE
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Publication number: 20190074798Abstract: An amplifier includes a power amplifier that amplifies an input signal, a VI detection circuit that is connected to a rear stage of the power amplifier to detect power of an output signal of the power amplifier, and a controller that turns on the power amplifier when the input signal is inputted to the power amplifier, turns off the power amplifier when the input signal is not inputted to the power amplifier, and turns on the power amplifier when the VI detection circuit detects a voltage that exceeds a predetermined value when the power amplifier is in off state.Type: ApplicationFiled: August 29, 2018Publication date: March 7, 2019Inventor: Mitsutaka GOTO
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Publication number: 20190028805Abstract: A memory previously stores, as reference impedance characteristics, frequency characteristics of impedance of the speaker during a normal operating state of the speaker. During use of the speaker, a detection circuitry detects, as current impedance characteristics, frequency characteristics of impedance of the speaker on the basis of a real-time audio signal being supplied to the speaker. A determination circuitry determines presence/absence of an abnormality of the speaker on the basis of comparison between the detected current impedance characteristics and the stored reference impedance characteristics. Thus, it is possible to check the operation of the speaker based on of the real-time audio signal without using any dedicated test signal. In this way, it is possible to detect presence/absence of an abnormality of the speaker on the basis of a real-time audio signal being supplied to the speaker, for example, during an actual performance in a concert.Type: ApplicationFiled: September 24, 2018Publication date: January 24, 2019Inventor: Mitsutaka GOTO
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Patent number: 9571055Abstract: A level of an input signal is detected according to a first following rate, and a first level signal indicating the detected level is generated. A level of the input signal is detected according to a second following rate lower than the first following rate, and a second level signal indicating the detected level is generated. One of the first and second level signals is selected based on a relation (e.g., ratio) between the first and second level signals so that a gain is determined based on the selected one of the first and second level signals. The level of the first input signal is adjusted according to the determined gain. For example, if the level variation is dominant, the gain adjustment suitable for the level variation can be performed, whereas, if the stable level is dominant, the gain adjustment suitable for the stable level can be performed.Type: GrantFiled: March 13, 2015Date of Patent: February 14, 2017Assignee: YAMAHA CORPORATIONInventors: Mitsutaka Goto, Kenji Suzuki
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Publication number: 20150263690Abstract: A level of an input signal is detected according to a first following rate, and a first level signal indicating the detected level is generated. A level of the input signal is detected according to a second following rate lower than the first following rate, and a second level signal indicating the detected level is generated. One of the first and second level signals is selected based on a relation (e.g., ratio) between the first and second level signals so that a gain is determined based on the selected one of the first and second level signals. The level of the first input signal is adjusted according to the determined gain. For example, if the level variation is dominant, the gain adjustment suitable for the level variation can be performed, whereas, if the stable level is dominant, the gain adjustment suitable for the stable level can be performed.Type: ApplicationFiled: March 13, 2015Publication date: September 17, 2015Inventors: Mitsutaka GOTO, Kenji SUZUKI
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Patent number: 8981147Abstract: The present invention provides a novel ligand represented by the following formula and a novel transition metal complex having the ligand, which shows superior enantioselectivity and catalytic efficiency, particularly high catalyst activity, in various asymmetric synthesis reactions. A transition metal complex having, as a ligand, a compound represented by the formula wherein R4 is a hydrogen atom or a C1-6 alkyl group optionally having substituent(s), and R5 and R6 are each a C1-6 alkyl group optionally having substituent(s), or the formula is a group represented by the formula wherein ring B is a 3- to 8-membered ring optionally having substituent(s).Type: GrantFiled: February 19, 2014Date of Patent: March 17, 2015Assignee: Takeda Pharmaceutical Company LimitedInventors: Mitsuhisa Yamano, Mitsutaka Goto, Shinji Kawaguchi, Masatoshi Yamada, Jun-ichi Kawakami
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Patent number: 8976982Abstract: In a mixer system including an editing device that edits a configuration of signal processing by designating a combination of a plurality of components and a DSP that processes audio signals in accordance with the signal processing configuration edited by the editing device, when the mixer engine does not store a predetermined enabling key, audio signal processing including a protected component in the mixer engine is disabled, and when the mixer engine stores the predetermined enabling key, the audio signal processing is enabled. Further, the editing device is permitted to edit a signal processing configuration including the protected component irrespective of storage of the enabling key in the mixer engine.Type: GrantFiled: February 24, 2005Date of Patent: March 10, 2015Assignee: Yamaha CorporationInventors: Mitsutaka Goto, Satoshi Takemura, Makoto Hiroi, Masatoshi Hanashiro
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Patent number: 8952185Abstract: Provided is a production method of an optically active dihydrobenzofuran derivative. A production method of an optically active form of a compound represented by the formula: wherein each symbol is as defined in the specification, or a salt thereof and the like.Type: GrantFiled: February 16, 2012Date of Patent: February 10, 2015Assignee: Takeda Pharmaceutical Company LimitedInventors: Mitsuhisa Yamano, Mitsutaka Goto, Takahiro Konishi