Signal processing device, signal processing method, and program

    公开(公告)号:US11030988B2

    公开(公告)日:2021-06-08

    申请号:US16335712

    申请日:2017-06-30

    Abstract: [Object] To shorten a time until an effect is obtained after start of an adaptive process mode on an ambient sound.
    [Solution] Provided is a signal processing device including: a noise cancellation processing unit configured to generate a noise cancellation signal on the basis of a collected ambient sound; a signal processing unit configured to generate an ambient sound adapted signal by performing dynamic analysis related to a feature of the ambient sound and filtering the ambient sound; and a control unit configured to control a plurality of modes related to signal processing. The plurality of modes includes a first mode in which acoustic reproduction based on the noise cancellation signal is performed and a second mode in which acoustic reproduction based on the noise cancellation signal and the ambient sound adapted signal is performed, and the signal processing unit continues the dynamic analysis even in the first mode.

    Signal processing apparatus, signal processing method, and computer program

    公开(公告)号:US10896668B2

    公开(公告)日:2021-01-19

    申请号:US16480381

    申请日:2017-12-11

    Abstract: A signal processing apparatus is provided which can suppress external noise without degrading an audio characteristic.
    Provided is a signal processing apparatus including: an A/D converter configured to output a digital signal having a predetermined sampling frequency and quantization bit number a, the A/D converter including a first delta sigma modulator that performs a first delta sigma modulation process on an input analog signal; a filter unit configured to pass an output of the A/D converter through a digital filter provided with a predetermined filter characteristic and output a digital signal having the sampling frequency and a quantization bit number b; a second delta sigma modulator configured to perform a second delta sigma modulation process on an output of the filter unit and output a digital signal having the sampling frequency and the quantization bit number a; and an addition unit configured to add an output of the second delta sigma modulator and an input digital signal having the sampling frequency and the quantization bit number.

    SOUND OUTPUT DEVICE, SOUND GENERATION METHOD, AND PROGRAM

    公开(公告)号:US20210006927A1

    公开(公告)日:2021-01-07

    申请号:US17028752

    申请日:2020-09-22

    Abstract: According to the present disclosure, a sound output device includes: a sound acquisition part configured to acquire sound to be output to the other end of a sound guide part, one end of which is arranged near an entrance of an ear canal of a listener, the sound guide part having a hollow structure; and a head-related transfer function adjustment part configured to adjust a head-related transfer function of sound captured by the sound guide part. Since the head-related transfer function adjustment part adjusts the head-related transfer function of sound captured by the sound guide part, it is possible to listen to both ambient sound and sound provided from a sound output device such that the listener does not feel strangeness even in the state in which the listener is wearing the sound output device.

    SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

    公开(公告)号:US20200301656A1

    公开(公告)日:2020-09-24

    申请号:US16896177

    申请日:2020-06-08

    Abstract: Provided is a signal processing device including a display control unit for causing a display to display an image corresponding to a specified place, a sound-collection-signal input unit for inputting a sound collection signal of a sound collection unit that collects a user sound produced with microphones surrounding the user, an acoustic-signal processing unit for performing a first acoustic-signal process for reproducing a sound field where the user sound is sensed as if the sound were echoing in the place on the signal input by the sound-collection-signal input unit, based on a first transfer function measured in the place to indicate how a sound emitted on a closed surface inside the place echoes in the place and then is transferred to the closed-surface side, and a sound-emission control unit for causing a sound based on the processed signal to be emitted from speakers surrounding the user.

    Headphone device, terminal device, information transmitting method, and headphone system

    公开(公告)号:US10667047B2

    公开(公告)日:2020-05-26

    申请号:US14354988

    申请日:2012-11-02

    Abstract: This disclosure relates to a headphone device, a terminal device, an information transmitting method, a program, and a headphone system capable of reducing a process burden of parameter control in a noise canceling process of the headphone device.In the terminal device capable of communicating with the headphone device, a parameter appropriate for the noise canceling process is determined based on analysis of noise from outside and position information and indication information to indicate a processing parameter related to the noise canceling process in the headphone device is generated. This is transmitted to the headphone device side. In the headphone device, a processing parameter of the noise canceling process is set according to the indication information. According to this, a process to determine an optimal parameter of the noise canceling process on the headphone device side is not required.

    SIGNAL PROCESSING APPARATUS, METHOD, AND PROGRAM

    公开(公告)号:US20200043459A1

    公开(公告)日:2020-02-06

    申请号:US16340764

    申请日:2017-07-26

    Abstract: [Object] To provide a structure that can effectively reduce a noise containing a component varying in characteristic.[Solution] A signal processing apparatus including: a signal processing section configured to generate a first noise reduction signal using an adaptive filter on the basis of a signal output from a first input apparatus, and cause the generated first noise reduction signal to be output by a first output apparatus, and generate a second noise reduction signal using a fixed filter on the basis of a signal output from a second input apparatus, and cause the generated second noise reduction signal to be output by a second output apparatus.

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