Patents by Inventor Reishi Kondo

Reishi Kondo 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).

  • Publication number: 20240032885
    Abstract: A lung sound analysis system includes an acquisition means for acquiring time-series acoustic signals including lung sounds of a heart failure patient, a detection means for detecting abnormal lung sounds from the acquired time-series acoustic signals, an observation acquisition means for transmitting, to a terminal device of a medical specialist, analysis object lung sound information in which the acquired time-series acoustic signals and a result of the detection are associated with each other, and receiving, from the terminal device, analysis object lung sound information to which an observation by the medial specialist on the time-series acoustic signals is added, and a generation means for generating learning data for detecting abnormal lung sounds on the basis of the analysis object lung sound information to which the observation by the medial specialist is added.
    Type: Application
    Filed: August 25, 2020
    Publication date: February 1, 2024
    Applicant: NEC Corporation
    Inventors: Masao HIGUCHI, Mitsuru Noma, Reishi Kondo, Yumi Arai
  • Publication number: 20230320690
    Abstract: An analysis device includes a detection unit that detects abnormality in lung sounds for each of auscultation positions on the basis of time-series acoustic signals including lung sounds of each of the auscultation positions; a determination unit that determines severity of heart failure of a patient on the basis of a detection result of abnormality in the lung sounds of each of the auscultation positions detected by the detection unit and condition information representing a condition of the patient; and an output unit that decides whether or not to output predetermined information to an external device on the basis of a result of determination by the determination unit, and performs output corresponding to a result of decision.
    Type: Application
    Filed: August 25, 2020
    Publication date: October 12, 2023
    Applicant: NEC Corporation
    Inventors: Masao Higuchi, Mitsuru Noma, Reishi Kondo, Yumi Arai
  • Publication number: 20230316720
    Abstract: An anomaly detection apparatus extracts a circumstantial feature value for anomaly detection corresponding to a circumstantial feature value for learning from other modal signal for anomaly detection different in modal from acoustic, calculates a signal pattern feature related to an acoustic signal of anomaly detection target based on the acoustic signal of anomaly detection target, the circumstantial feature value for anomaly detection and a signal pattern model learned based on an acoustic signal for learning and the circumstantial feature value for learning calculated from other modal signal for learning, and calculates an anomaly score for performing an anomaly detection of the acoustic signal of anomaly detection target based on the signal pattern feature.
    Type: Application
    Filed: June 5, 2023
    Publication date: October 5, 2023
    Applicant: NEC Corporation
    Inventors: Tatsuya KOMATSU, Reishi KONDO
  • Publication number: 20230301616
    Abstract: A lung sound analysis system includes a storage means for storing therein the history of auscultation observations on lung sound data of each of auscultation positions of a subject who is a heart failure patient, a calculation means for calculating appearance frequency of abnormal sounds for each of the auscultation positions on the basis of the history, a determination means for determining the sequence of the auscultation positions at which lung sounds are to be auscultated from the subject, on the basis of the calculated appearance frequency, and an acquisition means for giving guidance on the auscultation positions of the subject to an operator according to the determined sequence, and acquiring time-series acoustic signals including lung sounds from a guided auscultation position.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 28, 2023
    Applicant: NEC Corporation
    Inventors: Masao Higuchi, Mitsuru Noma, Reishi Kondo, Yumi Arai
  • Publication number: 20230293103
    Abstract: An analysis device includes a detection unit that detects abnormality in lung sounds for each of auscultation positions on the basis of time-series acoustic signals including lung sounds of each of the auscultation positions; a determination unit that determines severity of heart failure of a patient on the basis of a detection result of abnormality in the lung sounds of each of the auscultation positions detected by the detection unit and condition information representing the condition of the patient; and a decision unit that decides an instruction to be output to the patient on the basis of a result of the determination by the determination unit.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 21, 2023
    Applicant: NEC Corporation
    Inventors: Masao Higuchi, Mitsuru Noma, Reishi Kondo, Yumi Arai
  • Publication number: 20230296409
    Abstract: A signal processing device according to an aspect of the present disclosure comprises: cutout means that cuts out a target signal in a predetermined section, and an overlap signal in a section not matching the predetermined section but overlapping with at least part of the predetermined section from an input signal; conversion means that converts the target signal and the overlap signal into a phase component signal in a frequency domain with respect to each frequency; gradient calculation means that, based on the phase component signal, calculates, at each frequency, a phase gradient that is the gradient of the phase component at the frequency; score calculation means that calculates a score relating to the sudden change characteristic of the input signal according to the phase gradients; and determination means that, based on the score, determines the presence or absence of a sudden change in the target signal.
    Type: Application
    Filed: September 29, 2020
    Publication date: September 21, 2023
    Applicant: NEC Corporation
    Inventors: Sakiko MISHIMA, Reishi KONDO
  • Publication number: 20230293136
    Abstract: A lung sound analysis system includes an acquisition means for acquiring time-series acoustic signals including lung sounds of a subject who is a heart failure patient, a determination means for determining a pause phase of breathing of the subject, a dividing means for dividing the time-series acoustic signals into those in a period of the pause phase of breathing of the subject and those in a period other than the pause phase, according to a result of the determination, and a detection means for detecting abnormality in the lung sounds from the time-series acoustic signals in the period other than the pause phase after the division.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 21, 2023
    Applicant: NEC Corporation
    Inventors: Masao Higuchi, Mitsuru Noma, Reishi Kondo, Yumi Arai
  • Publication number: 20230284998
    Abstract: A lung sound analysis system includes an acquisition means for acquiring time-series acoustic signals including lung sounds of a subject who is a heart failure patient, a determination means for determining a pause phase of breathing of the subject, a dividing means for dividing the time-series acoustic signals into those in a period of the pause phase of the subject and those in a period other than the pause phase, according to a result of the determination, a calculation means for calculating an index value representing the quality of the time-series acoustic signals in the period other than the pause phase, from the intensity of the time-series acoustic signals in the period of the pause phase and the intensity of the time-series acoustic signals in the period other than the pause phase after the division, and a warning means for giving warning based on the calculated index value.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 14, 2023
    Applicant: NEC Corporation
    Inventors: Masao Higuchi, Mitsuru Noma, Reishi Kondo, Yumi Arai
  • Patent number: 11715284
    Abstract: An anomaly detection apparatus extracts a circumstantial feature value for anomaly detection corresponding to a circumstantial feature value for learning from other modal signal for anomaly detection different in modal from acoustic, calculates a signal pattern feature related to an acoustic signal of anomaly detection target based on the acoustic signal of anomaly detection target, the circumstantial feature value for anomaly detection and a signal pattern model learned based on an acoustic signal for learning and the circumstantial feature value for learning calculated from other modal signal for learning, and calculates an anomaly score for performing an anomaly detection of the acoustic signal of anomaly detection target based on the signal pattern feature.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: August 1, 2023
    Assignee: NEC CORPORATION
    Inventors: Tatsuya Komatsu, Reishi Kondo
  • Publication number: 20230231595
    Abstract: An information processing device is configured to receive a test signal related to a content. Accordingly, the information processing device can discriminate the status of a transmission path based on the state of the received test signal.
    Type: Application
    Filed: June 29, 2020
    Publication date: July 20, 2023
    Applicant: NEC Corporation
    Inventors: Eisuke SANEYOSHI, Reishi KONDO
  • Publication number: 20230184621
    Abstract: Provided an apparatus including: a signal acquisition part that acquires an oscillation signal from a sensor that detects an oscillation induced in a target object; and an estimation part that obtains a feature value for each frame of the oscillation signal by applying Fourier transform to each frame extracted by a window of a predetermined length to calculate the feature value for the each frame in a frequency domain, and performs Gaussian mixture model-clustering on a time series of the feature values for respective frames to estimate one or more clusters, each of which is modeled with a Gaussian probability distribution best fit to the time series, and detect one or more events by detecting one or more corresponding clusters, a probability density value thereof greater than a predetermined threshold value.
    Type: Application
    Filed: March 12, 2020
    Publication date: June 15, 2023
    Applicant: NEC Corporation
    Inventors: Murtuza PETLADWALA, Shohei KINOSHITA, Shigeru KASAI, Reishi KONDO
  • Patent number: 11626102
    Abstract: A signal source identification device includes: a feature value calculation unit configured to calculate feature values corresponding to paths where signals from generation sources of the signals transmit, based on signals received by a plurality of sensors; and an identification unit configured to identify whether or not a feature value calculated by the feature value calculation unit is a signal from a predetermined signal source by using an identification range that is a range within which feature values based on signals from the predetermined signal source fall and that is previously determined based on the feature values calculated by the feature value calculation unit.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: April 11, 2023
    Assignee: NEC CORPORATION
    Inventors: Reishi Kondo, Yuzo Senda
  • Patent number: 11620985
    Abstract: A pattern recognition apparatus includes: a model storage part that stores a model(s) generated by using transfer path information indicating a difference of transfer paths of a signal(s) for training, additional to the signal(s) for training, and a pattern recognition part that inputs an input signal and transfer path information indicating a difference of transfer paths of the input signal, and performs pattern recognition of the input signal by using the model(s).
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 4, 2023
    Assignee: NEC CORPORATION
    Inventors: Tatsuya Komatsu, Reishi Kondo
  • Publication number: 20230085975
    Abstract: This signal analysis device provides information to assist determining the state of a time series signal. An identification unit (120) identifies events included in the time series signal, and a ranking generation unit (140) generates a ranking among multiple event types.
    Type: Application
    Filed: March 18, 2020
    Publication date: March 23, 2023
    Applicant: NEC Corporation
    Inventors: Yuko OHTA, Reishi KONDO
  • Publication number: 20230071304
    Abstract: In order to estimate the trajectory of a moving wave source, this trajectory estimation device (10) comprises: an acquisition unit (11) that acquires wave motion data based on wave motion detected by a plurality of sensors (100); a generation unit (12) that generates a spectrogram using the wave motion data; an extraction unit (13) that extracts a Doppler shift from the spectrogram; a selection unit (14) that selects, as a sensor pair, two sensors that satisfy a preset selection condition pertaining to the Doppler shift; and an estimation unit (15) that estimates the trajectory of a wave source, which is the source generating the wave motion, on the basis of the positional relationship between the sensors constituting the sensor pair and the relationship of the Doppler shift between the two sensors constituting the sensor pair.
    Type: Application
    Filed: March 10, 2020
    Publication date: March 9, 2023
    Applicant: NEC Corporation
    Inventors: Yumi ARAI, Reishi KONDO
  • Publication number: 20220342026
    Abstract: A wave source direction estimation device includes a signal extraction unit that sequentially extracts, one at a time, signals of signal segments according to a set time length from at least two input signals based on a wave detected at different detection positions, a function generation unit that generates a function associating at least two signals extracted by the signal extraction unit, a sharpness calculation unit that calculates sharpness of a peak of the function generated by the function generation unit, and a time length calculation unit that calculates the time length based on the sharpness and set the calculated time length.
    Type: Application
    Filed: September 2, 2019
    Publication date: October 27, 2022
    Applicant: NEC Corporation
    Inventors: Yumi ARAI, Reishi KONDO
  • Publication number: 20220293081
    Abstract: Provided is a noise estimation device capable of appropriately estimating the amount of noise in an observation signal. The noise estimation device includes: frequency analysis processing means for receiving an input of an observation signal that includes a moving object sound output from an moving object and noise and transforming the observation signal into a feature in each of time-frequency domains; noise range estimation means for estimating a first feature in a first time-frequency domain to which only the noise belongs based on acoustic characteristic information of the moving object sound and the feature; and amount-of-noise estimation means for estimating an amount of noise in a second time-frequency domain to which the moving object sound belongs based on the first feature.
    Type: Application
    Filed: August 8, 2019
    Publication date: September 15, 2022
    Applicant: NEC Corporation
    Inventors: Sakiko MISHIMA, Reishi KONDO
  • Patent number: 11408963
    Abstract: A wave-source-direction estimation device includes: a plurality of input units that acquires, as input signals, electrical signals based on waves detected by a plurality of sensors; a signal selection unit that selects a plurality of pairs that are each a combination of two input signals from among a plurality of the input signals; a relative delay time calculation unit that calculates, as relative delay times, arrival time differences of the waves at the sensors that are supply sources of the two input signals composing each of the pairs, for each wave source direction; and an integrated-estimated-direction-information calculation unit that generates per-frequency estimated direction information for each of the pairs using the input signals composing each of the pairs and the relative delay times of each of the pairs and generates integrated estimated direction information by assigning a weight to and integrating the estimated direction information on all the pairs.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: August 9, 2022
    Assignee: NEC CORPORATION
    Inventors: Yumi Arai, Reishi Kondo, Yuzo Senda
  • Patent number: 11397792
    Abstract: An anomaly detecting device according to the present invention includes: a memory; and at least one processor coupled to the memory. The processor performs operations. The operations includes: when first series data are input, extracting a series feature amount being a feature amount of a signal included in the first series data; calculating a series probability distribution being a probability distribution which the series feature amount follows; storing a reference probability distribution being a probability distribution designated as a reference for the series feature amount in the first series data; calculating a state feature amount representing a fluctuation condition of the series probability distribution with respect to the reference probability distribution; and detecting an anomaly of the first series data, based on a plurality of the state feature amounts calculated from the first series data.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: July 26, 2022
    Assignee: NEC CORPORATION
    Inventors: Tatsuya Komatsu, Reishi Kondo
  • Publication number: 20220028372
    Abstract: The acoustic feature extraction means 82 extracts an acoustic feature, using predetermined parameters, from an acoustic pattern obtained as a result of processing on an acoustic signal. The language vector calculation means 83 calculates a language vector from a given label that represents an attribute of a source of the acoustic signal and that is associated with the acoustic pattern. The similarity calculation means 84 calculates a similarity between the acoustic feature and the language vector. The parameter update means 85 learns parameters so that the similarity becomes larger, and updates the predetermined parameters to the parameters obtained by learning.
    Type: Application
    Filed: September 20, 2018
    Publication date: January 27, 2022
    Applicant: NEC Corporation
    Inventors: Tatsuya KOMATSU, Reishi KONDO, Sakiko MISHIMA