公开(公告)号：US20180233124A1

公开(公告)日：2018-08-16

申请号：US15506858

申请日：2015-09-04

Applicant: SONY CORPORATION

Inventor： TETSUNORI ITABASHI ,  KOHEI ASADA ,  KEIICHI OSAKO ,  SHIGETOSHI HAYASHI

IPC: G10K11/178 ,  H04R5/02

CPC classification number: G10K11/17823 ,  B60R11/02 ,  G10K11/178 ,  G10K11/17853 ,  H04M9/08 ,  H04R5/02 ,  H04R2499/13

Abstract: The present disclosure relates to a noise reduction device, a noise reduction method, and a program 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 on the basis of an estimation value indicating estimation of an acoustic characteristic in a route from each of a predetermined number of speakers to a microphone. Moreover, signal processing is performed for an error signal representing a waveform of an error measured by the microphone in accordance with an amplitude-frequency characteristic obtained from the corresponding one of the acoustic characteristics. 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.

公开(公告)号：US20170229137A1

公开(公告)日：2017-08-10

申请号：US15501124

申请日：2015-08-06

Applicant: SONY CORPORATION

Inventor： KEIICHI OSAKO ,  TAKASHI SHIBUYA ,  TOSHIYUKI SEKIYA ,  MOTOTSUGU ABE

IPC: G10L21/0232 ,  G10L21/0264 ,  G10L25/84

Abstract: The present technology relates to an audio processing apparatus, an audio processing method, and a program which enable to appropriately eliminate a noise. An audio processing apparatus includes a sound collector which collects audio, an audio enhancer which enhances audio to be extracted using an audio signal collected by the sound collector, an audio attenuator which attenuates the audio to be extracted using the audio signal collected by the sound collector, a noise environment estimator which estimates a surrounding noise environment, and a post-filtering unit which performs post-filtering processing using an audio-enhanced signal from the audio enhancer and an audio-attenuated signal from the audio attenuator, in which the post-filtering unit sets strength of processing for noise elimination according to the noise environment by the noise environment estimator. The present technology can be applied to an apparatus which performs audio recognition processing, such as a mobile phone.

公开(公告)号：US20210286073A1

公开(公告)日：2021-09-16

申请号：US16482626

申请日：2017-12-07

Applicant: SONY CORPORATION

Inventor： KEIICHI OSAKO ,  KOHEI ASADA ,  TETSUNORI ITABASHI ,  KAZUMA YOSHII ,  KENICHI MAKINO ,  YASUNOBU MURATA ,  SHIGETOSHI HAYASHI

IPC: G01S15/52 ,  G01S15/58 ,  G01S7/52 ,  G01S7/539

Abstract: To provide a mechanism for selectively taking an external sound from an appropriate sound source into an internal space of a moving object. An information processing apparatus including an acquisition unit configured to acquire an audio signal from a sound source existing outside a moving object, a generation unit configured to generate an audio signal from a target sound source at a distance from the moving object, the distance being a distance according to a speed of the moving object, of the sound sources, on the basis of the audio signal acquired by the acquisition unit, and an output control unit configured to output the audio signal generated by the generation unit toward an internal space of the moving object.

公开(公告)号：US20170332172A1

公开(公告)日：2017-11-16

申请号：US15522628

申请日：2015-10-29

Applicant: SONY CORPORATION

Inventor： KEIICHI OSAKO ,  KENICHI MAKINO ,  KOHEI ASADA ,  TETSUNORI ITABASHI

IPC: H04R3/04 ,  G10L21/0232 ,  H04R29/00

CPC classification number: H04R3/04 ,  G10L21/0232 ,  G10L21/0264 ,  H04R1/406 ,  H04R3/005 ,  H04R29/00 ,  H04R2499/11

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.