Noise reduction device and noise reduction method

    公开(公告)号:US10255899B2

    公开(公告)日:2019-04-09

    申请号:US15506858

    申请日:2015-09-04

    Abstract: The present disclosure relates to a noise reduction device and a noise reduction method capable of reducing noise in a more stable and effective manner. Signal processing is performed to generate a reference signal representing a waveform of noise. Moreover, signal processing is performed for an error signal representing a waveform of an error measured by a microphone in accordance with an amplitude-frequency characteristic. Then, a filter coefficient with which the error signal becomes zero is calculated under adaptive algorithm with reference to the reference signal. The reference signal is filtered by using the filter coefficient to obtain a control signal. The control signal is supplied to the corresponding one of the predetermined number of output units. The present technology is applicable to a noise cancelling system equipped in a closed space such as an interior of a vehicle, for example.

    Peripheral device, host device, and processing method

    公开(公告)号:US10198392B2

    公开(公告)日:2019-02-05

    申请号:US15301735

    申请日:2015-04-02

    Abstract: There is provided a peripheral device including a multi-pole plug inserted into a jack of a jack device, the jack device including the jack, a conversion unit that converts a physical amount into an electrical signal or converts an electrical signal into a physical amount, a detection unit that detects whether the jack device is a corresponding device capable of handling multiplexed data obtained by multiplexing the electrical signal input and output to and from the conversion unit, a transmission and reception processing unit that transmits or receives the multiplexed data via a predetermined terminal of the multi-pole plug when the jack device is a corresponding device, and a function switching unit that performs assignment of an electrical function of a terminal other than the predetermined terminal of the multi-pole plug.

    SOUND OUTPUT DEVICE, SOUND GENERATION METHOD, AND PROGRAM

    公开(公告)号:US20180367937A1

    公开(公告)日:2018-12-20

    申请号:US15765365

    申请日:2016-09-06

    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.

    Sound processing device and sound processing method

    公开(公告)号:US10034088B2

    公开(公告)日:2018-07-24

    申请号:US15522628

    申请日:2015-10-29

    Abstract: The present technology relates to a sound processing device, a sound processing method, and a program, which can collect a desired sound. A sound processing device includes: a sound collection unit configured to collect a sound; an application unit configured to apply a predetermined filter to a signal of the sound collected by the sound collection unit; a selection unit configured to select a filter coefficient of the filter applied by the application unit; and a correction unit configured to correct the signal from the application unit. The selection unit selects the filter coefficient on the basis of the signal of the sound collected by the sound collection unit. The selection unit creates, on the basis of the signal of the sound collected by the sound collection unit, a histogram which associates a direction where the sound occurs and a strength of the sound and selects the filter coefficient on the basis of the histogram. The present technology can be applied to a sound processing device.

    SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD

    公开(公告)号:US20180159489A1

    公开(公告)日:2018-06-07

    申请号:US15888495

    申请日:2018-02-05

    CPC classification number: H03G3/00 G10H2250/035 H03G5/005 H03G5/165

    Abstract: A signal processing apparatus includes: a control section; a signal processing section connected with a plurality of signal processing elements and configured to perform signal processing for enhancing or attenuating an input signal in a specific frequency band; and a crossfade signal section including a crossfade signal processing element capable of replacing at least one of the signal processing elements, wherein the control section is configured to control any one of the signal processing elements among the plurality of signal processing elements, and the crossfade signal processing element, to crossfade to the crossfade signal processing element having the signal processing element as a new characteristic, to perform processing for replacing any one of the signal processing elements by the crossfade signal processing element, and to perform the processing on remaining signal processing elements of the plurality of signal processing elements in the signal processing section.

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