Title:
SIGNAL PROCESSING DEVICE, PROGRAM, AND RANGE HOOD DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/199341
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a signal processing device, a program, and a range hood device capable of sufficiently suppressing gain in a noise reduction filter in a low-frequency band. In the signal processing device, program, and range hood device pertaining to the present invention, a coefficient-updating unit (140) computes a filter coefficient on the basis of a first reference signal (r1(t)) in which frequency components less than a threshold frequency are blocked from the output of a reference microphone (111), a second reference signal (r2(t)) in which the power spectrum less than the threshold frequency is uniform, a first error signal (e1(t)) in which frequency components less than the threshold frequency are blocked from the output of an error microphone (112), and a second error signal (e2(t)), which is a signal that is less than the threshold frequency (f1) based on the filter coefficient and the second reference signal (r2(t)).
Inventors:
HANAZONO MASAYA
YAMADA WAKIO
YAMADA WAKIO
Application Number:
PCT/JP2016/002274
Publication Date:
December 15, 2016
Filing Date:
May 10, 2016
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G10K11/178; F24C15/20; F24F7/06; G10K11/16; H03H17/00; H03H17/06
Foreign References:
| JPH0830280A | 1996-02-02 | |||
| US20140270222A1 | 2014-09-18 | |||
| JPH06185778A | 1994-07-08 |
Attorney, Agent or Firm:
KAMATA, Kenji et al. (JP)
Kenji Kamata (JP)
Kenji Kamata (JP)
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