公开(公告)号：US20220301569A1

公开(公告)日：2022-09-22

申请号：US17746832

申请日：2022-05-17

申请人： Pindrop Security, Inc.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/26 ,  H04L9/40 ,  G06F21/32 ,  G06K9/62 ,  G10L25/30 ,  G10L17/18 ,  G10L17/04 ,  G10L15/26 ,  G06V40/10 ,  G06V40/16

摘要： A score indicating a likelihood that a first subject is the same as a second subject may be calibrated to compensate for aging of the first subject between samples of age-sensitive biometric characteristics. Age of the first subject obtained at a first sample time and age of the second subject obtained at a second sample time may be averaged, and an age approximation may be generated based on at least the age average and an interval between the first and second samples. The age approximation, the interval between the first and second sample times, and an obtained gender of the subject are used to calibrate the likelihood score.

公开(公告)号：US20200294510A1

公开(公告)日：2020-09-17

申请号：US16889337

申请日：2020-06-01

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/26 ,  G10L15/26 ,  H04L29/06 ,  G06K9/00 ,  G06F21/32 ,  G06K9/62 ,  G10L25/30 ,  G10L17/18 ,  G10L17/04

摘要： A score indicating a likelihood that a first subject is the same as a second subject may be calibrated to compensate for aging of the first subject between samples of age-sensitive biometric characteristics. Age of the first subject obtained at a first sample time and age of the second subject obtained at a second sample time may be averaged, and an age approximation may be generated based on at least the age average and an interval between the first and second samples. The age approximation, the interval between the first and second sample times, and an obtained gender of the subject are used to calibrate the likelihood score.

公开(公告)号：US20190392842A1

公开(公告)日：2019-12-26

申请号：US16536293

申请日：2019-08-08

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/08 ,  G06N3/08 ,  G06N3/04 ,  G10L17/22 ,  G10L17/18 ,  G10L15/16 ,  G10L17/04 ,  G10L17/02

摘要： The present invention is directed to a deep neural network (DNN) having a triplet network architecture, which is suitable to perform speaker recognition. In particular, the DNN includes three feed-forward neural networks, which are trained according to a batch process utilizing a cohort set of negative training samples. After each batch of training samples is processed, the DNN may be trained according to a loss function, e.g., utilizing a cosine measure of similarity between respective samples, along with positive and negative margins, to provide a robust representation of voiceprints.

公开(公告)号：US20200321009A1

公开(公告)日：2020-10-08

申请号：US16907951

申请日：2020-06-22

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Parav NAGARSHETH ,  Kailash PATIL ,  Matthew GARLAND

IPC分类号： G10L17/02 ,  G10L17/04 ,  G10L25/24 ,  G10L17/18 ,  G10L19/02 ,  G10L17/06 ,  G10L17/00

摘要： An automated speaker verification (ASV) system incorporates a first deep neural network to extract deep acoustic features, such as deep CQCC features, from a received voice sample. The deep acoustic features are processed by a second deep neural network that classifies the deep acoustic features according to a determined likelihood of including a spoofing condition. A binary classifier then classifies the voice sample as being genuine or spoofed.

公开(公告)号：US20190096424A1

公开(公告)日：2019-03-28

申请号：US16200283

申请日：2018-11-26

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L25/45 ,  G10L25/51 ,  G10L25/27 ,  G10L25/78

摘要： Methods, systems, and apparatuses for audio event detection, where the determination of a type of sound data is made at the cluster level rather than at the frame level. The techniques provided are thus more robust to the local behavior of features of an audio signal or audio recording. The audio event detection is performed by using Gaussian mixture models (GMMs) to classify each cluster or by extracting an i-vector from each cluster. Each cluster may be classified based on an i-vector classification using a support vector machine or probabilistic linear discriminant analysis. The audio event detection significantly reduces potential smoothing error and avoids any dependency on accurate window-size tuning. Segmentation may be performed using a generalized likelihood ratio and a Bayesian information criterion, and the segments may be clustered using hierarchical agglomerative clustering. Audio frames may be clustered using K-means and GMMs.

公开(公告)号：US20180075849A1

公开(公告)日：2018-03-15

申请号：US15818231

申请日：2017-11-20

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/08 ,  G06N3/08 ,  G06N3/04 ,  G10L17/22 ,  G10L17/18 ,  G10L15/16 ,  G10L17/04 ,  G10L17/02

CPC分类号： G10L17/08 ,  G06N3/04 ,  G06N3/08 ,  G10L15/16 ,  G10L17/02 ,  G10L17/04 ,  G10L17/18 ,  G10L17/22

摘要： The present invention is directed to a deep neural network (DNN) having a triplet network architecture, which is suitable to perform speaker recognition. In particular, the DNN includes three feed-forward neural networks, which are trained according to a batch process utilizing a cohort set of negative training samples. After each batch of training samples is processed, the DNN may be trained according to a loss function, e.g., utilizing a cosine measure of similarity between respective samples, along with positive and negative margins, to provide a robust representation of voiceprints.

公开(公告)号：US20210134316A1

公开(公告)日：2021-05-06

申请号：US17121291

申请日：2020-12-14

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L25/45 ,  G10L25/51 ,  G10L25/27 ,  G10L25/78

摘要： Methods, systems, and apparatuses for audio event detection, where the determination of a type of sound data is made at the cluster level rather than at the frame level. The techniques provided are thus more robust to the local behavior of features of an audio signal or audio recording. The audio event detection is performed by using Gaussian mixture models (GMMs) to classify each cluster or by extracting an i-vector from each cluster. Each cluster may be classified based on an i-vector classification using a support vector machine or probabilistic linear discriminant analysis. The audio event detection significantly reduces potential smoothing error and avoids any dependency on accurate window-size tuning. Segmentation may be performed using a generalized likelihood ratio and a Bayesian information criterion, and the segments may be clustered using hierarchical agglomerative clustering. Audio frames may be clustered using K-means and GMMs.

公开(公告)号：US20190333521A1

公开(公告)日：2019-10-31

申请号：US16505452

申请日：2019-07-08

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/20 ,  G10L17/18 ,  G10L19/028 ,  G10L17/02 ,  G10L17/04

摘要： A system for generating channel-compensated features of a speech signal includes a channel noise simulator that degrades the speech signal, a feed forward convolutional neural network (CNN) that generates channel-compensated features of the degraded speech signal, and a loss function that computes a difference between the channel-compensated features and handcrafted features for the same raw speech signal. Each loss result may be used to update connection weights of the CNN until a predetermined threshold loss is satisfied, and the CNN may be used as a front-end for a deep neural network (DNN) for speaker recognition/verification. The DNN may include convolutional layers, a bottleneck features layer, multiple fully-connected layers and an output layer. The bottleneck features may be used to update connection weights of the convolutional layers, and dropout may be applied to the convolutional layers.

公开(公告)号：US20180082692A1

公开(公告)日：2018-03-22

申请号：US15709024

申请日：2017-09-19

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/20 ,  G10L17/18 ,  G10L17/04 ,  G10L17/02 ,  G10L19/028

CPC分类号： G10L17/20 ,  G10L17/02 ,  G10L17/04 ,  G10L17/18 ,  G10L19/028

摘要： A system for generating channel-compensated features of a speech signal includes a channel noise simulator that degrades the speech signal, a feed forward convolutional neural network (CNN) that generates channel-compensated features of the degraded speech signal, and a loss function that computes a difference between the channel-compensated features and handcrafted features for the same raw speech signal. Each loss result may be used to update connection weights of the CNN until a predetermined threshold loss is satisfied, and the CNN may be used as a front-end for a deep neural network (DNN) for speaker recognition/verification. The DNN may include convolutional layers, a bottleneck features layer, multiple fully-connected layers and an output layer. The bottleneck features may be used to update connection weights of the convolutional layers, and dropout may be applied to the convolutional layers.

公开(公告)号：US20180082691A1

公开(公告)日：2018-03-22

申请号：US15709232

申请日：2017-09-19

申请人： PINDROP SECURITY, INC.

发明人： Elie KHOURY ,  Matthew GARLAND

IPC分类号： G10L17/18 ,  G10L17/02 ,  G10L17/06

CPC分类号： G10L17/18 ,  G10L17/02 ,  G10L17/04 ,  G10L17/06

摘要： In a speaker recognition apparatus, audio features are extracted from a received recognition speech signal, and first order Gaussian mixture model (GMM) statistics are generated therefrom based on a universal background model that includes a plurality of speaker models. The first order GMM statistics are normalized with regard to a duration of the received speech signal. The deep neural network reduces a dimensionality of the normalized first order GMM statistics, and outputs a voiceprint corresponding to the recognition speech signal.