Title:
SOUND PICK-UP DEVICE, SOUND PICK-UP METHOD AND SOUND PICK-UP PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/131346
Kind Code:
A1
Abstract:
A sound pick-up device (1) comprises: an adaptive filter (141) that generates, from a reference signal, an estimated noise signal indicating the component of a noise signal included in an input signal acquired by a microphone (11); a noise-removed signal generating unit (15) that generates a noise-removed signal obtained by subtracting the estimated noise signal from the input signal; a filter factor updating unit (142) that updates the filter factor of the adaptive filter (141) by use of the noise-removed signal; and a sample position determining unit (162) that determines at least one of multiple signal sample positions from a signal sample position at which the absolute value of the noise-removed signal is the maximum to a signal sample position at which the absolute value of the noise-removed signal is the predetermined number-th largest, wherein the filter factor updating unit (142) updates the filter factor at the at least one signal sample position determined by the a sample position determining unit (162).
Inventors:
YUZURIHA SHINICHI (JP)
Application Number:
PCT/JP2020/041412
Publication Date:
July 01, 2021
Filing Date:
November 05, 2020
Export Citation:
Assignee:
PANASONIC IP CORP AMERICA (US)
International Classes:
H04R3/02; G10L21/0208; G10L21/0224
Domestic Patent References:
| WO2017132958A1 | 2017-08-10 |
Foreign References:
| JP2008042816A | 2008-02-21 | |||
| JP2009094802A | 2009-04-30 | |||
| JP5205935B2 | 2013-06-05 |
Other References:
See also references of EP 4064726A4
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
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