Patents by Inventor Ryu Takeda
Ryu Takeda 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: 11979059Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, each of the electrical steel sheets includes an annular core back part; a plurality of fastening parts are provided in the core back part at intervals in a circumferential direction; an adhesion region is formed on an outer circumferential side from the fastening parts in the core back part; and a non-adhesion region is formed on an inner circumferential side from the fastening parts in the core back part.Type: GrantFiled: December 17, 2019Date of Patent: May 7, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Yasuo Ohsugi, Ryu Hirayama, Kazutoshi Takeda
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Patent number: 11923130Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.Type: GrantFiled: December 17, 2019Date of Patent: March 5, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Masahito Kamikawabata, Ryu Hirayama, Kazutoshi Takeda
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Patent number: 11915860Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.Type: GrantFiled: December 17, 2019Date of Patent: February 27, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Ryu Hirayama, Kazutoshi Takeda
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Patent number: 11818557Abstract: A spatial normalization unit generates a normalized spectrum by normalizing an orientation component of a microphone array for a target direction included in a spectrum of an acoustic signal acquired from each of a plurality of microphones forming the microphone array into an orientation component for a predetermined standard direction. A mask function estimating unit determines a mask function used for extracting a component of a target sound source arriving in the target direction on the basis of the normalized spectrum using a machine learning model. A mask processing unit estimates the component of the target sound source installed in the target direction by applying the mask function to the acoustic signal.Type: GrantFiled: February 22, 2022Date of Patent: November 14, 2023Assignees: HONDA MOTOR CO., LTD., OSAKA UNIVERSITYInventors: Kazuhiro Nakadai, Ryu Takeda
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Publication number: 20220286775Abstract: A spatial normalization unit generates a normalized spectrum by normalizing an orientation component of a microphone array for a target direction included in a spectrum of an acoustic signal acquired from each of a plurality of microphones forming the microphone array into an orientation component for a predetermined standard direction. A mask function estimating unit determines a mask function used for extracting a component of a target sound source arriving in the target direction on the basis of the normalized spectrum using a machine learning model. A mask processing unit estimates the component of the target sound source installed in the target direction by applying the mask function to the acoustic signal.Type: ApplicationFiled: February 22, 2022Publication date: September 8, 2022Inventors: Kazuhiro Nakadai, Ryu Takeda
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Publication number: 20220138578Abstract: A node pruning device for a network model in which a plurality of layers are continuously connected includes: a node activation section configured to select a node to be pruned on the basis of a score function that represents importance of a node; an inter-layer pairing section configured to prune an input connected to a node pruned at an output of a previous layer; a bypass setting section configured to provide a bypass connection between an input and an output of a layer and not to prune the bypass connection; and a pruning execution section configured to prune the nodes with the same pruning rate for each layer.Type: ApplicationFiled: October 26, 2021Publication date: May 5, 2022Inventors: Kazuhiro Nakadai, Yosuke Fukumoto, Ryu Takeda
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Patent number: 10489451Abstract: Provided is a voice search technology that can efficiently find and check a problematic call. To this end, a voice search system of the present invention includes a call search database that stores, for each of a reception channel and a transmission channel of each of a plurality of pieces of recorded call voice data, voice section sequences in association with predetermined keywords and time information. The call search database is searched based on an input search keyword, so that a voice section sequence that contains the search keyword is obtained.Type: GrantFiled: September 11, 2013Date of Patent: November 26, 2019Assignee: Hitachi, Ltd.Inventors: Yusuke Fujita, Ryu Takeda, Naoyuki Kanda
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Patent number: 9989626Abstract: The present invention pertains to a method for estimating a sound source position in a space with high accuracy using a microphone installed on a robot moving in the space. A mobile robot includes a self-position estimation unit configure to estimate the self-position of the mobile robot, a sound source information obtaining unit configured to obtain direction information of an observed sound source, and a sound source position estimation unit configured to estimate the position of the sound source based on the estimated self-position and the direction information of the sound source.Type: GrantFiled: April 12, 2013Date of Patent: June 5, 2018Assignee: Hitachi, Ltd.Inventors: Takashi Sumiyoshi, Yasunari Obuchi, Naoyuki Kanda, Ryu Takeda
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Publication number: 20160171100Abstract: Provided is a voice search technology that can efficiently find and check a problematic call. To this end, a voice search system of the present invention includes a call search database that stores, for each of a reception channel and a transmission channel of each of a plurality of pieces of recorded call voice data, voice section sequences in association with predetermined keywords and time information. The call search database is searched based on an input search keyword, so that a voice section sequence that contains the search keyword is obtained.Type: ApplicationFiled: September 11, 2013Publication date: June 16, 2016Applicant: Hitachi, Ltd.Inventors: Yusuke FUJITA, Ryu TAKEDA, Naoyuki KANDA
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Publication number: 20160103202Abstract: The present invention pertains to a method for estimating a sound source position in a space with high accuracy using a microphone installed on a robot moving in the space. A mobile robot includes a self-position estimation unit configure to estimate the self-position of the mobile robot, a sound source information obtaining unit configured to obtain direction information of an observed sound source, and a sound source position estimation unit configured to estimate the position of the sound source based on the estimated self-position and the direction information of the sound source.Type: ApplicationFiled: April 12, 2013Publication date: April 14, 2016Inventors: Takashi SUMIYOSHI, Yasunari OBUCHI, Naoyuki KANDA, Ryu TAKEDA
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Patent number: 9002024Abstract: A reverberation suppressing apparatus, includes: a sound acquiring unit which acquires a sound signal; a reverberation data computing unit which computes reverberation data from the acquired sound signal; a reverberation characteristics estimating unit which estimates reverberation characteristics based on the computed reverberation data; a filter length estimating unit which estimates a filter length of a filter which is used to suppress a reverberation based on the estimated reverberation characteristics; and a reverberation suppressing unit which suppresses the reverberation based on the estimated filter length.Type: GrantFiled: February 28, 2011Date of Patent: April 7, 2015Assignee: Honda Motor Co., Ltd.Inventors: Kazuhiro Nakadai, Ryu Takeda, Hiroshi Okuno
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Patent number: 8594846Abstract: A beat tracking apparatus includes: a filtering unit configured to perform a filtering process on an input acoustic signal and to accentuate an onset; a beat interval reliability calculating unit configured to perform a time-frequency pattern matching process employing a mutual correlation function on the acoustic signal of which the onset is accentuated and to calculate a beat interval reliability; and a beat interval estimating unit configured to estimate a beat interval on the basis of the calculated beat interval reliability.Type: GrantFiled: July 15, 2009Date of Patent: November 26, 2013Assignee: Honda Motor Co., Ltd.Inventors: Kazuhiro Nakadai, Yuji Hasegawa, Hiroshi Tsujino, Kazumasa Murata, Ryu Takeda, Hiroshi Okuno
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Patent number: 8391505Abstract: A reverberation suppressing apparatus separating sound source signals based on input signals output from microphones collecting the plurality of sound source signals, includes a sound signal output unit generating sound signals and outputting the generated sound signals, a sound acquiring unit acquiring the input signals from microphones, a first evaluation function calculation unit calculating a separation matrix, the input signals, and the sound source signals, and calculating a first evaluation function, a reverberation component suppressing unit calculating an optimal separation matrix, and suppressing a reverberation component by separating the sound source signals other than the generated sound signals, and a separation matrix updating unit dividing a step-size function, approximating each segment to a linear function, calculating step sizes based on the approximated linear functions, and repeatedly updating the separation matrix so that the degree of separation of the sound source signals exceeds the pType: GrantFiled: June 1, 2010Date of Patent: March 5, 2013Assignee: Honda Motor Co., Ltd.Inventors: Kazuhiro Nakadai, Hirofumi Nakajima, Hiroshi Okuno, Ryu Takeda
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Publication number: 20110268283Abstract: A reverberation suppressing apparatus, includes: a sound acquiring unit which acquires a sound signal; a reverberation data computing unit which computes reverberation data from the acquired sound signal; a reverberation characteristics estimating unit which estimates reverberation characteristics based on the computed reverberation data; a filter length estimating unit which estimates a filter length of a filter which is used to suppress a reverberation based on the estimated reverberation characteristics; and a reverberation suppressing unit which suppresses the reverberation based on the estimated filter length.Type: ApplicationFiled: February 28, 2011Publication date: November 3, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Kazuhiro NAKADAI, Ryu TAKEDA, Hiroshi OKUNO
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Patent number: 7999168Abstract: A robot includes: a sound collecting unit collecting and converting a musical sound into a musical acoustic signal; a voice signal generating unit generating a self-vocalized voice signal; a sound outputting unit converting the self-vocalized voice signal into a sound and outputting the sound; a self-vocalized voice regulating unit receiving the musical acoustic signal and the self-vocalized voice signal; a filtering unit performing a filtering process; a beat interval reliability calculating unit performing a time-frequency pattern matching process and calculating a beat interval reliability; a beat interval estimating unit estimating a beat interval; a beat time reliability calculating unit calculating a beat time reliability; a beat time estimating unit estimating a beat time on the basis of the calculated beat time reliability; a beat time predicting unit predicting a beat time before the current time; and a synchronization unit synchronizing the self-vocalized voice signal.Type: GrantFiled: July 15, 2009Date of Patent: August 16, 2011Assignee: Honda Motor Co., Ltd.Inventors: Kazuhiro Nakadai, Yuji Hasegawa, Hiroshi Tsujino, Kazumasa Murata, Ryu Takeda, Hiroshi Okuno
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Patent number: 7987090Abstract: A system capable of reducing the influence of sound reverberation or reflection to improve sound-source separation accuracy. An original signal X(?,f) is separated from an observed signal Y(?,f) according to a first model and a second model to extract an unknown signal E(?,f). According to the first model, the original signal X(?,f) of the current frame f is represented as a combined signal of known signals S(?,f?m+1) (m=1 to M) that span a certain number M of current and previous frames. This enables extraction of the unknown signal E(?,f) without changing the window length while reducing the influence of reverberation or reflection of the known signal S(?,f) on the observed signal Y(?,f).Type: GrantFiled: August 7, 2008Date of Patent: July 26, 2011Assignee: Honda Motor Co., Ltd.Inventors: Ryu Takeda, Kazuhiro Nakadai, Hiroshi Tsujino, Hiroshi Okuno
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Publication number: 20100329472Abstract: A reverberation suppressing apparatus separating sound source signals based on input signals output from microphones collecting the plurality of sound source signals, includes a sound signal output unit generating sound signals and outputting the generated sound signals, a sound acquiring unit acquiring the input signals from microphones, a first evaluation function calculation unit calculating a separation matrix, the input signals, and the sound source signals, and calculating a first evaluation function, a reverberation component suppressing unit calculating an optimal separation matrix, and suppressing a reverberation component by separating the sound source signals other than the generated sound signals, and a separation matrix updating unit dividing a step-size function, approximating each segment to a linear function, calculating step sizes based on the approximated linear functions, and repeatedly updating the separation matrix so that the degree of separation of the sound source signals exceeds the pType: ApplicationFiled: June 1, 2010Publication date: December 30, 2010Applicant: HONDA MOTOR CO., LTD.Inventors: Kazuhiro NAKADAI, Hirofumi NAKAJIMA, Hiroshi OKUNO, Ryu TAKEDA
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Publication number: 20100017034Abstract: A beat tracking apparatus includes: a filtering unit configured to perform a filtering process on an input acoustic signal and to accentuate an onset; a beat interval reliability calculating unit configured to perform a time-frequency pattern matching process employing a mutual correlation function on the acoustic signal of which the onset is accentuated and to calculate a beat interval reliability; and a beat interval estimating unit configured to estimate a beat interval on the basis of the calculated beat interval reliability.Type: ApplicationFiled: July 15, 2009Publication date: January 21, 2010Applicant: Honda Motor Co., Ltd.Inventors: Kazuhiro NAKADAI, Yuji HASEGAWA, Hiroshi TSUJINO, Kazumasa MURATA, Ryu TAKEDA, Hiroshi OKUNO
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Publication number: 20100011939Abstract: A robot includes: a sound collecting unit collecting and converting a musical sound into a musical acoustic signal; a voice signal generating unit generating a self-vocalized voice signal; a sound outputting unit converting the self-vocalized voice signal into a sound and outputting the sound; a self-vocalized voice regulating unit receiving the musical acoustic signal and the self-vocalized voice signal; a filtering unit performing a filtering process; a beat interval reliability calculating unit performing a time-frequency pattern matching process and calculating a beat interval reliability; a beat interval estimating unit estimating a beat interval; a beat time reliability calculating unit calculating a beat time reliability; a beat time estimating unit estimating a beat time on the basis of the calculated beat time reliability; a beat time predicting unit predicting a beat time before the current time; and a synchronization unit synchronizing the self-vocalized voice signal.Type: ApplicationFiled: July 15, 2009Publication date: January 21, 2010Applicant: Honda Motor Co., Ltd.Inventors: Kazuhiro NAKADAI, Yuji Hasegawa, Hiroshi Tsujino, Kazumasa Murata, Ryu Takeda, Hiroshi Okuno
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Publication number: 20090043588Abstract: A system capable of reducing the influence of sound reverberation or reflection to improve sound-source separation accuracy. An original signal X(?,f) is separated from an observed signal Y(?,f) according to a first model and a second model to extract an unknown signal E(?,f). According to the first model, the original signal X(?,f) of the current frame f is represented as a combined signal of known signals S(?,f?m+1) (m=1 to M) that span a certain number M of current and previous frames. This enables extraction of the unknown signal E(?,f) without changing the window length while reducing the influence of reverberation or reflection of the known signal S(?,f) on the observed signal Y(?,f).Type: ApplicationFiled: August 7, 2008Publication date: February 12, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Ryu Takeda, Kazuhiro Nakadai, Hiroshi Tsujino, Hiroshi Okuno