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    Adaptive beamforming to create reference channels
    31.
    发明授权
    Adaptive beamforming to create reference channels 有权

    公开(公告)号：US09747920B2

    公开(公告)日：2017-08-29

    申请号：US14973274

    申请日：2015-12-17

    Applicant: Amazon Technologies, Inc.

    Inventor： Robert Ayrapetian ,  Philip Ryan Hilmes

    IPC: G10L21/0216 ,  H04R5/04 ,  G10L21/0208

    CPC classification number: G10L21/0216 ,  G10L21/0208 ,  G10L2021/02082 ,  G10L2021/02166 ,  H04R3/005 ,  H04R5/04 ,  H04R2201/40 ,  H04R2203/12 ,  H04R2420/07

    Abstract: An echo cancellation system that performs audio beamforming to separate audio input into multiple directions and determines a target signal and a reference signal from the multiple directions. For example, the system may detect a strong signal associated with a speaker and select the strong signal as a reference signal, selecting another direction as a target signal. The system may determine a speech position and may select the speech position as a target signal and an opposite direction as a reference signal. The system may create pairwise combinations of opposite directions, with an individual direction being selected as a target signal and a reference signal. The system may select a fixed beamformer output for the target signal and an adaptive beamformer output for the reference signal, or vice versa. The system may remove the reference signal (e.g., audio output by the loudspeaker) to isolate speech included in the target signal.

    Steering vector estimation for minimum variance distortionless response (MVDR) beamforming circuits, systems, and methods
    34.
    发明授权
    Steering vector estimation for minimum variance distortionless response (MVDR) beamforming circuits, systems, and methods 有权
    最小方差失真响应（MVDR）波束成形电路，系统和方法的转向矢量估计

    公开(公告)号：US09525934B2

    公开(公告)日：2016-12-20

    申请号：US14588288

    申请日：2014-12-31

    Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

    Inventor： Samuel Samsudin Ng ,  Sapna George ,  Karthik Muralidhar

    IPC: H04R1/40

    CPC classification number: H04R1/406 ,  H04R3/005 ,  H04R2201/40 ,  H04R2201/401 ,  H04R2201/403 ,  H04R2430/23 ,  H04R2430/25 ,  H04R2499/11 ,  H04R2499/13

    Abstract: A method of estimating a steering vector of a sensor array of M sensors according to one embodiment of the present disclosure includes estimating a steering vector of a noise source located at an angle θ degrees from a look direction of the array using a least squares estimate of the gains of the sensors in the array, defining a steering vector of a desired sound source in the look direction of the array, and estimating the steering vector by performing element-by-element multiplication of the estimated noise vector and the complex conjugate of steering vector of the desired sound source. The sensors may be microphones.

    Abstract translation: 根据本公开的一个实施例，估计M个传感器的传感器阵列的导向矢量的方法包括使用最小二乘估计估计与阵列的外观方向成角度θ度的噪声源的导向矢量， 阵列中的传感器的增益，在阵列的外观方向上定义所需声源的导向矢量，以及通过执行所估计的噪声向量和转向的复共轭的逐个元素相乘来估计导向矢量 所需声源的矢量。 传感器可以是麦克风。

    MULTISTAGE MINIMUM VARIANCE DISTORTIONLESS RESPONSE BEAMFORMER
    36.
    发明申请
    MULTISTAGE MINIMUM VARIANCE DISTORTIONLESS RESPONSE BEAMFORMER 有权
    多级最小变量失真反应波束形成器

    公开(公告)号：US20160277862A1

    公开(公告)日：2016-09-22

    申请号：US14792783

    申请日：2015-07-07

    Applicant: Northwestern Polytechnical University

    Inventor： Jingdong Chen ,  Chao Pan ,  Jacob Benesty

    IPC: H04R29/00 ,  H04R3/00

    CPC classification number: H04R29/005 ,  G10L21/0216 ,  G10L2021/02166 ,  H04R1/40 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/40 ,  H04R2201/403 ,  H04R2410/01 ,  H04R2430/20 ,  H04R2430/23

    Abstract: A system and method relate to receiving, by a processing device, a plurality of sound signals captured at a plurality of microphone sensors, wherein the plurality of sound signals are from a sound source, and wherein a number (M) of the plurality of microphone sensors is greater than three, determining a number (K) of layers for a multistage minimum variance distortionless response (MVDR) beamformer based on the number (M) of the plurality of microphone sensors, wherein the number (K) of layers is greater than one, and wherein each layer of the multistage MVDR beamformer comprises one or more mini-length MVDR beamformers, and executing the multistage MVDR beamformer to the plurality of sound signals to calculate an estimate of the sound source.

    Abstract translation: 一种系统和方法涉及通过处理装置接收在多个麦克风传感器处捕获的多个声音信号，其中所述多个声音信号来自声源，并且其中所述多个麦克风的数量（M） 传感器大于3，基于多个麦克风传感器的数量（M）确定用于多级最小方差失真响应（MVDR）波束形成器的层数（K），其中层数（K）大于 一个，并且其中多级MVDR波束形成器的每层包括一个或多个微型长度MVDR波束形成器，并且对多个声音信号执行多级MVDR波束形成器以计算声源的估计。

    Device for estimating placement of physical objects
    37.
    发明授权
    Device for estimating placement of physical objects 有权
    用于估计物体物体放置的装置

    公开(公告)号：US09307335B2

    公开(公告)日：2016-04-05

    申请号：US14370859

    申请日：2013-01-30

    Applicant: Japan Science and Technology Agency

    Inventor： Shiro Ise ,  Kayo Matsuoka

    IPC: H04R3/00 ,  H04R29/00 ,  G01S5/18 ,  H04R3/12 ,  H04R1/40 ,  H04S7/00 ,  G01S5/30

    CPC classification number: H04R29/00 ,  G01S5/18 ,  G01S5/30 ,  H04R1/403 ,  H04R1/406 ,  H04R3/12 ,  H04R2201/40 ,  H04S7/301 ,  H04S2400/11

    Abstract: An object position estimating apparatus which estimates positions of M objects in real space (M being an integer not less than 2), including: a characteristic vector generating unit operable to generate, for each of M objects, a characteristic vector, the characteristic vector including as its components measurements of the object measured on N scales (N being an integer not less than 3), each of N scales measuring closeness to each of N reference points in the real space; a dissimilarity matrix deriving unit operable to calculate a norm between the characteristic vectors of two objects for every pair from among M objects and to derive a dissimilarity matrix with M rows and M columns, the dissimilarity matrix including as its elements the calculated norms; and an estimation unit operable to estimate positions of M objects in the real space based on the dissimilarity matrix and to output an estimation result.

    Abstract translation: 一种物体位置估计装置，其估计实际空间中的M个物体的位置（M是不小于2的整数），包括：特征矢量生成单元，用于为M个物体中的每一个生成特征矢量，所述特征矢量包括 作为在N个尺度（N是不小于3的整数）上测量的对象的组件测量，N个尺度中的每一个测量与实际空间中的每个N个参考点的接近度; 一个不相似矩阵导出单元，用于计算M个对象中每对的两个对象的特征向量之间的范数，并导出具有M行和M列的不相似矩阵，该不相似矩阵包括作为其计算出的范数的元素; 以及估计单元，其可操作以基于所述不相似矩阵来估计所述实际空间中的M个对象的位置并输出估计结果。

    SOUND PROCESSING DEVICE, AND SOUND PROCESSING METHOD
    38.
    发明申请
    SOUND PROCESSING DEVICE, AND SOUND PROCESSING METHOD 有权
    声音处理装置和声音处理方法

    公开(公告)号：US20150124997A1

    公开(公告)日：2015-05-07

    申请号：US14366702

    申请日：2012-10-24

    Applicant: Panasonic Corporation

    Inventor： Yutaka Banba ,  Takeo Kanamori

    IPC: H04R3/00

    CPC classification number: H04R3/005 ,  H04R1/326 ,  H04R1/406 ,  H04R2201/40

    Abstract: A sound processing apparatus (400) is provided with: a directivity synthesis processing unit (410) for generating a first directivity sound pick-up signal by synthesizing a first sound pick-up signal and a relatively delayed second sound pick-up signal and a second directivity sound pick-up signal by synthesizing a relatively delayed first sound pick-up signal and a second sound pick-up signal; a comparison signal calculation unit (440) for generating a non-directivity level signal indicating the level of a sum of the directivity sound pick-up signals and a directivity level signal by adding the levels of the directivity sound pick-up signals; a level comparison unit (451) for acquiring the difference between the levels of the non-directivity level signal and the directivity level signal; and a delay control unit (452) for adjusting the delay amount such that the difference between the levels becomes smaller.

    Abstract translation: 一种声音处理装置（400）具有：方向性合成处理单元（410），用于通过合成第一拾音信号和相对延迟的第二声音拾取信号来产生第一指向性声音拾取信号， 第二指向性声音拾取信号，通过合成相对延迟的第一拾音信号和第二拾音信号; 比较信号计算单元，用于通过相加方向性声音拾取信号的电平来产生指示方向性声音拾取信号和方向性电平信号的和的电平的非方向性电平信号; 电平比较单元（451），用于获取非方向性电平信号和方向性电平信号的电平之间的差; 以及延迟控制单元（452），用于调整所述延迟量，使得所述电平之间的差变小。

    PORTABLE EYE TRACKING DEVICE
    39.
    发明申请
    PORTABLE EYE TRACKING DEVICE 有权
    便携式眼睛跟踪装置

    公开(公告)号：US20150062322A1

    公开(公告)日：2015-03-05

    申请号：US14281587

    申请日：2014-05-19

    Applicant: TOBBI TECHNOLOGY AB

    Inventor： Simon Gustafsson ,  Jonas Andersson ,  Erik Engwall ,  Richard Hainzl ,  Lars-Ola Leksén ,  Markus Cederlund

    IPC: H04N5/225

    CPC classification number: H04N5/2254 ,  A61B3/113 ,  G02B27/017 ,  G02B2027/0138 ,  G02B2027/014 ,  G02B2027/0178 ,  G02B2027/0187 ,  G06F3/013 ,  G06T7/74 ,  G06T2207/10152 ,  G06T2207/30201 ,  H04N5/2256 ,  H04R1/32 ,  H04R2201/40

    Abstract: A portable eye tracker device is disclosed which includes a frame, at least one optics holding member, and a control unit. The frame may be adapted for wearing by a user. The at least one optics holding member may include at least one illuminator configured to selectively illuminate at least a portion of at least one eye of the user, and at least one image sensor configured to capture image data representing images of at least a portion of at least one eye of the user. The control unit may be configured to control the at least one illuminator for the selective illumination of at least a portion of at least one eye of the user, and receive the image data from the at least one image sensor.

    Abstract translation: 公开了一种便携式眼睛追踪装置，其包括框架，至少一个光学保持构件和控制单元。 框架可以适于用户佩戴。 所述至少一个光学保持构件可以包括被配置为选择性地照亮所述用户的至少一只眼睛的至少一部分的至少一个照明器，并且至少一个图像传感器被配置为捕获表示至少一部分at 用户的最少一只眼睛。 控制单元可以被配置为控制至少一个照明器用于选择性地照射用户的至少一只眼睛的至少一部分，并且从至少一个图像传感器接收图像数据。

    Method for encoding multiple microphone signals into a source-separable audio signal for network transmission and an apparatus for directed source separation
    40.
    发明授权
    Method for encoding multiple microphone signals into a source-separable audio signal for network transmission and an apparatus for directed source separation 有权
    用于将多个麦克风信号编码为用于网络传输的源可分离音频信号的方法和用于定向信号源分离的装置

    公开(公告)号：US08670554B2

    公开(公告)日：2014-03-11

    申请号：US13452550

    申请日：2012-04-20

    Applicant: Shridhar K. Mukund

    Inventor： Shridhar K. Mukund

    IPC: H04M9/08 ,  H04B15/00 ,  G06F15/00 ,  G10L21/00 ,  G10L15/00

    CPC classification number: H04S3/006 ,  G10L25/84 ,  G10L2021/02161 ,  H04R2201/40 ,  H04S2400/03

    Abstract: A method is provided for encoding multiple microphone signals into a composite source-separable audio (SSA) signal, conducive for transmission over a voice network. The embodiments enable the processing of source separation of the target voice signal from its ambient sound to be performed at any point in the voice communication network, including the internet cloud. A multiplicity of processing is possible over the SSA signal, based on the intended voice application. The level of processing is adapted with the availability of the processing power at the chosen processing node in the network in one embodiment. An apparatus for separating out the target source voice from its ambient sound is also provided. The apparatus includes a directed source separation (DSS) unit, which processes the two virtual microphone signals in the SSA representation, to generate a new SSA signal including the enhanced target voice and the enhanced ambient noise.

    Abstract translation: 提供了一种用于将多个麦克风信号编码为有助于通过语音网络传输的复合源可分离音频（SSA）信号的方法。 这些实施例使得能够在包括因特网云的语音通信网络中的任何点处处理目标语音信号与其环境声音的源分离。 基于预期的语音应用，可以通过SSA信号进行多种处理。 在一个实施例中，处理水平适应网络中所选择的处理节点处的处理能力的可用性。 还提供了用于将目标源语音与其环境声音分离的设备。 该装置包括处理SSA表示中的两个虚拟麦克风信号的定向源分离（DSS）单元，以产生包括增强的目标语音和增强的环境噪声的新的SSA信号。

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