Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2024/038522
Kind Code:
A1
Abstract:
The present invention provides a signal processing device and the like in which entire spatial information relating to a target sound source can be used through introduction of a MaxSNR criterion. The signal processing device comprises: a second spatial covariance matrix estimation unit that uses an estimated value of a spatial/temporal covariance matrix of a non-target sound source to estimate a spatial covariance matrix of the non-target sound source; a reverberation removal filter estimation unit that uses the estimated value of the spatial/temporal covariance matrix of the non-target sound source to estimate a reverberation removal filter; a beam former estimation unit that uses an observed signal or an estimated value of a spatial covariance matrix of a target sound source, the estimated value of the spatial covariance matrix of the non-target sound source, and the estimated reverberation removal filter to estimate a convolutional beam former; and a sound source extraction unit that uses the observed signal and the estimated convolutional beam former to perform beam forming processing, thereby estimating a sound source signal.
Inventors:
IKESHITA RINTARO (JP)
NAKATANI TOMOHIRO (JP)
NAKATANI TOMOHIRO (JP)
Application Number:
PCT/JP2022/031099
Publication Date:
February 22, 2024
Filing Date:
August 17, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04R3/00; G10L21/028
Domestic Patent References:
| WO2020121545A1 | 2020-06-18 |
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
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