Title:
SIGNAL PROCESSOR, SIGNAL PROCESSING METHOD, AND PROGRAM
Document Type and Number:
Japanese Patent JP2023089431
Kind Code:
A
Abstract:
To improve separation performance by properly approximating frequency covariance of a source signal.SOLUTION: A frequency covariance matrix approximating frequency correlation of a source signal is obtained and output by linear combination of a first matrix, which is a diagonal matrix representing an estimated power of the source signal in each frequency interval based on an observation signal based on a source signal emitted from one or more signal sources or a separation signal obtained by applying a separation filter to the observation signal, and a second matrix representing rank 1 frequency covariance corresponding to an estimated waveform of the source signal based on the observation signal or the separation signal.SELECTED DRAWING: Figure 1
Inventors:
IKESHITA RINTARO
NAKATANI TOMOHIRO
NARUSAWA NAOKI
TAKAMUNE NORIHARU
NAKAMURA TOMOHIKO
SARUWATARI HIROSHI
NAKATANI TOMOHIRO
NARUSAWA NAOKI
TAKAMUNE NORIHARU
NAKAMURA TOMOHIKO
SARUWATARI HIROSHI
Application Number:
JP2021203902A
Publication Date:
June 28, 2023
Filing Date:
December 16, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
UNIV TOKYO
UNIV TOKYO
International Classes:
G10L21/028; G10L21/0272; G10L25/30
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Munehiro Yoshimura
Yukio Nakamura
Munehiro Yoshimura