Patents by Inventor Takafumi Koshinaka

Takafumi Koshinaka 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).

  • Patent number: 11074329
    Abstract: An authentication device is provided with: a plurality of attribute-dependent score calculation units each calculating an attribute-dependent score dependent on a prescribed attribute for input data; an attribute-independent score calculation unit for calculating an attribute-independent score independent of the attribute for the input data; an attribute estimation unit for performing attribute estimation for the input data; and a score integration unit for determining a score weight of each of a plurality of attribute-dependent scores and of the attribute-independent score using the result of the attribute estimation and calculating an output score using the attribute-dependent scores, the attribute-independent score, and the determined score weights.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: July 27, 2021
    Assignee: NEC CORPORATION
    Inventors: Koji Okabe, Hitoshi Yamamoto, Takafumi Koshinaka
  • Publication number: 20210201918
    Abstract: A biometric authentication device is provided with: a replay unit for reproducing a sound; an ear authentication unit for acquiring a reverberation sound of the sound in an ear of a user to be authenticated, extracting an ear acoustic feature from the reverberation sound, and calculating an ear authentication score by comparing the extracted ear acoustic feature with an ear acoustic feature stored in advance; a voice authentication unit for extracting a talker feature from a voice of the user that has been input, and calculating a voice authentication score by comparing the extracted talker feature with a talker feature stored in advance; and an authentication integration unit for outputting an authentication integration result calculated based on the ear authentication score and the voice authentication score. After the sound is output into the ear, a recording unit inputs the voice of the user.
    Type: Application
    Filed: August 22, 2019
    Publication date: July 1, 2021
    Applicant: NEC Corporation
    Inventors: Koji OKABE, Takayuki ARAKAWA, Takafumi KOSHINAKA
  • Patent number: 11039236
    Abstract: The accuracy of ear authentication is ensured over a range from an audible range to a non-audible range. An earphone includes a sound emitting unit, a sound collecting unit, a housing containing the sound emitting unit and the sound collecting unit, a sound hole formed inside the housing, the sound hole being configured to propagate an emitted sound to a predetermined direction and propagate a sound coming from the predetermined direction to the sound collecting unit, and an ear pad covering at least a part of the sound hole, in which an ear-pad side end face is configured so as not to project beyond a sound-hole side end face at least in the predetermined direction, the ear-pad side end face being an end face of the ear pad, the sound-hole side end face being an end face of the sound hole in the predetermined direction.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: June 15, 2021
    Assignee: NEC Platforms, Ltd.
    Inventors: Kohei Osugi, Kouji Oosugi, Takafumi Koshinaka
  • Publication number: 20210134300
    Abstract: This speech processing device is provided with: a contribution degree estimation means which calculates a contribution degree representing a quality of a segment of the speech signal; and a speaker feature calculation means which calculates a feature from the speech signal, for recognizing attribute information of the speech signal, using the contribution degree as a weight of the segment of the speech signal.
    Type: Application
    Filed: March 7, 2017
    Publication date: May 6, 2021
    Applicant: NEC Corporation
    Inventors: Hitoshi YAMAMOTO, Takafumi KOSHINAKA
  • Publication number: 20210133302
    Abstract: An authentication device is provided with: a plurality of attribute-dependent score calculation units each calculating an attribute-dependent score dependent on a prescribed attribute for input data; an attribute-independent score calculation unit for calculating an attribute-independent score independent of the attribute for the input data; an attribute estimation unit for performing attribute estimation for the input data; and a score integration unit for determining a score weight of each of a plurality of attribute-dependent scores and of the attribute-independent score using the result of the attribute estimation and calculating an output score using the attribute-dependent scores, the attribute-independent score, and the determined score weights.
    Type: Application
    Filed: March 23, 2017
    Publication date: May 6, 2021
    Applicant: NEC Corporation
    Inventors: Koji OKABE, Hitoshi YAMAMOTO, Takafumi KOSHINAKA
  • Publication number: 20210103646
    Abstract: Provided are a personal authentication device performing accurate authentication immediately follow insertion an earphone/microphone device to wear, and preventing spoofing after authentication.
    Type: Application
    Filed: April 28, 2017
    Publication date: April 8, 2021
    Applicants: NEC Corporation, NEC Platforms Ltd.
    Inventors: Takafumi KOSHINAKA, Kouji OOSUGI, Kohei OSUGI
  • Publication number: 20210050021
    Abstract: A feature vector having high class identification capability is generated. A signal processing system provided with: a first generation unit for generating a first feature vector on the basis of one of time-series voice data, meteorological data, sensor data, and text data, or on the basis of a feature quantity of one of these; a weight calculation unit for calculating a weight for the first feature vector; a statistical amount calculation unit for calculating a weighted average vector and a weighted high-order statistical vector of second or higher order using the first feature vector and the weight; and a second generation unit for generating a second feature vector using the weighted high-order statistical vector.
    Type: Application
    Filed: March 13, 2019
    Publication date: February 18, 2021
    Applicant: NEC Corporation
    Inventors: Koji OKABE, Takafumi KOSHINAKA
  • Publication number: 20210027778
    Abstract: The speech processing apparatus 100 includes an air microphone speech recognition unit 101 which recognizes speech from an air microphone 200 acquiring speech through air, a wearable microphone speech recognition unit 102 which recognizes speech from a wearable microphone 300, a sensing unit 103 which measures environmental conditions, a weight decision unit 104 which calculates the weights for recognition results of the air microphone speech recognition unit 101 and the wearable microphone speech recognition unit 102 on the basis of the environmental conditions, and a combination unit 105 which combines the recognition results outputted from the air microphone speech recognition unit 101 and the wearable microphone speech recognition unit 102, using the weights.
    Type: Application
    Filed: February 14, 2018
    Publication date: January 28, 2021
    Applicant: NEC Corporation
    Inventors: Qiongqiong WANG, Takafumi KOSHINAKA
  • Patent number: 10867019
    Abstract: A personal authentication device includes: acoustic signal transmission means 701 for transmitting a first acoustic signal to a part of a head of a user; acoustic signal observation means 702 for observing a second acoustic signal which is an acoustic signal after the first acoustic signal propagates through the part of the head; acoustic property calculation means 703 for calculating an acoustic property from the first acoustic signal and the second acoustic signal; and user identification means 704 for identifying the user, based on the acoustic property or a feature value extracted from the acoustic property and relating to the user.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: December 15, 2020
    Assignees: NEC CORPORATION
    Inventors: Shouhei Yano, Takayuki Arakawa, Takafumi Koshinaka, Hitoshi Imaoka, Hideki Irisawa
  • Patent number: 10803875
    Abstract: A speaker recognition system includes a non-transitory computer readable medium configured to store instructions. The speaker recognition system further includes a processor connected to the non-transitory computer readable medium. The processor is configured to execute the instructions for extracting acoustic features from each frame of a plurality of frames in input speech data. The processor is configured to execute the instructions for calculating a saliency value for each frame of the plurality of frames using a first neural network (NN) based on the extracted acoustic features, wherein the first NN is a trained NN using speaker posteriors. The processor is configured to execute the instructions for extracting a speaker feature using the saliency value for each frame of the plurality of frames.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: October 13, 2020
    Assignee: NEC CORPORATION
    Inventors: Qiongqiong Wang, Koji Okabe, Takafumi Koshinaka
  • Publication number: 20200258527
    Abstract: A speaker recognition system includes a non-transitory computer readable medium configured to store instructions. The speaker recognition system further includes a processor connected to the non-transitory computer readable medium. The processor is configured to execute the instructions for extracting acoustic features from each frame of a plurality of frames in input speech data. The processor is configured to execute the instructions for calculating a saliency value for each frame of the plurality of frames using a first neural network (NN) based on the extracted acoustic features, wherein the first NN is a trained NN using speaker posteriors. The processor is configured to execute the instructions for extracting a speaker feature using the saliency value for each frame of the plurality of frames.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 13, 2020
    Inventors: Qiongqiong WANG, Koji OKABE, Takafumi KOSHINAKA
  • Publication number: 20200211567
    Abstract: Provided is a pattern recognition apparatus to provide classification robustness to any kind of domain variability. The pattern recognition apparatus 500 based on Neural Network (NN) includes: NN training unit 501 that trains an NN model to generate NN parameters, based on at least one first feature vector and at least one domain vector indicating one of subsets in a specific domain, wherein, the first feature vector is extracted from each of the subsets, the domain vector indicates an identifier corresponding to the each of the subsets; and NN verification unit 502 that verifies a pair of second feature vectors in the specific domain to output whether the pair indicates same individual or not, based on a target domain vector and the NN parameters.
    Type: Application
    Filed: September 15, 2017
    Publication date: July 2, 2020
    Applicant: NEC Corporation
    Inventors: Qiongqiong WANG, Takafumi KOSHINAKA
  • Patent number: 10614343
    Abstract: The A pattern recognition apparatus using domain adaptation 10 comprises an estimation unit 11. The estimation unit 11 estimates PLDA (Probabilistic Linear Discriminant Analysis) parameters and transformation parameters from features of a first domain data and a second domain data so as to maximize/minimize an objective function with respect to the features.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: April 7, 2020
    Assignee: NEC CORPORATION
    Inventors: Qiongqiong Wang, Takafumi Koshinaka
  • Publication number: 20200092628
    Abstract: The accuracy of ear authentication is ensured over a range from an audible range to a non-audible range. An earphone includes a sound emitting unit, a sound collecting unit, a housing containing the sound emitting unit and the sound collecting unit, a sound hole formed inside the housing, the sound hole being configured to propagate an emitted sound to a predetermined direction and propagate a sound coming from the predetermined direction to the sound collecting unit, and an ear pad covering at least a part of the sound hole, in which an ear-pad side end face is configured so as not to project beyond a sound-hole side end face at least in the predetermined direction, the ear-pad side end face being an end face of the ear pad, the sound-hole side end face being an end face of the sound hole in the predetermined direction.
    Type: Application
    Filed: May 23, 2017
    Publication date: March 19, 2020
    Applicants: NEC Platforms, Ltd., NEC CORPORATION
    Inventors: Kohei OSUGI, Kouji OOSUGI, Takafumi KOSHINAKA
  • Publication number: 20200019875
    Abstract: Please delete the Abstract of the Disclosure, and replace it with the following: Provided is a parameter calculation device or the like that calculates a parameter with which it is possible to produce a model that is a basis for correctly classifying data. A parameter calculation device calculates a value following a predetermined distribution for relevance information and generates a class vector including the calculated value. The relevance information represents a relevance among data, the value following the predetermined distribution, an between-class scatter degree of the data, and a within-class scatter degree of the data. The data is classified into the class.
    Type: Application
    Filed: February 14, 2018
    Publication date: January 16, 2020
    Applicant: NEC Corporation
    Inventors: Takafumi KOSHINAKA, Takayuki SUZUKI
  • Patent number: 10490194
    Abstract: A speech processing apparatus, method and non-transitory computer-readable storage medium are disclosed. A speech processing apparatus may include a memory storing instructions, and at least one processor configured to process the instructions to calculate an acoustic diversity degree value representing a degree of variation in types of sounds included in a speech signal representing a speech, on a basis of the speech signal, and compensate for a recognition feature value calculated to recognize specific attribute information from the speech signal, using the acoustic diversity degree value.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: November 26, 2019
    Assignee: NEC Corporation
    Inventors: Hitoshi Yamamoto, Takafumi Koshinaka
  • Publication number: 20190347565
    Abstract: A pattern recognition apparatus for discriminative training includes: a similarity calculator that calculates similarities among training data; a statistics calculator that calculates statistics from the similarities in accordance with current labels for the training data; and a discriminative probabilistic linear discriminant analysis (PLDA) trainer that receives the training data, the statistics of the training data, the current labels and PLDA parameters, and updates the PLDA parameters and the labels of the training data.
    Type: Application
    Filed: March 9, 2017
    Publication date: November 14, 2019
    Applicant: NEC Corporation
    Inventors: Qiongqiong WANG, Takafumi KOSHINAKA
  • Publication number: 20190279644
    Abstract: A speech processing device includes at least one memory configured to store instructions and at least one processor configured to execute the instructions to: store one or more acoustic models; calculate an acoustic feature from a received speech signal, and by using the acoustic feature calculated and the acoustic model stored, calculate an acoustic diversity that is a vector representing a degree of variations of types of sounds; by using the calculated acoustic diversity and a selection coefficient, calculate a weighted acoustic diversity, and by using the weighted acoustic diversity calculated and the acoustic feature, calculate a recognition feature for recognizing identity of a speaker that concerns the speech signal; and calculate a feature vector by using the recognition feature calculated.
    Type: Application
    Filed: September 11, 2017
    Publication date: September 12, 2019
    Applicant: NEC CORPORATION
    Inventors: Hitoshi YAMAMOTO, Takafumi KOSHINAKA, Takayuki SUZUKI
  • Publication number: 20190258789
    Abstract: Provided is a personal authentication device capable of simply securing security with little psychological and physical burden of a user to be authenticated.
    Type: Application
    Filed: September 11, 2017
    Publication date: August 22, 2019
    Applicant: NEC Corporation
    Inventors: Takafumi KOSHINAKA, Masahiro SAIKOU, Takayuki ARAKAWA
  • Publication number: 20190244064
    Abstract: A pattern recognition apparatus according to the present invention includes: a memory; and at least one processor coupled to the memory, the processor performing operations, the operations comprising: transforming noisy feature vectors into denoised feature vectors; classifying the denoised feature vectors into related classes and estimated classes; calculating a cost by using the denoised feature vectors, clean feature vectors, the estimated classes, and feature vector labels; and updating parameters for transforming the noisy feature vectors according to the cost.
    Type: Application
    Filed: October 25, 2016
    Publication date: August 8, 2019
    Applicant: NEC Corporation
    Inventors: Shivangi MAHTO, Hitoshi YAMAMOTO, Takafumi KOSHINAKA