Title:
SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD, AND SIGNAL PROCESSING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/092798
Kind Code:
A1
Abstract:
In order to achieve high-speed convergence and low-distortion output signals without manually controlling a step size, a signal processing apparatus is provided with: a first input means that receives a first intermingled signal in which a first signal and a second signal are intermingled; a second input means that receives a second intermingled signal in which a third signal correlated with the first signal and a fourth signal correlated with the second signal are intermingled; a first adaptive filter that filters the second intermingled signal, thereby generating a first estimated value of the second signal; a first subtraction unit that generates, from the first intermingled signal and the first estimated value of the second signal, a first estimated value of the first signal and a second estimated value of the first signal; and an estimation unit that uses the second estimated value of the first signal, the first estimated value of the second signal and the second intermingled signal to estimate, as a first interminglement ratio, a ratio in amplitude or power between the first signal and the second signal, wherein the first interminglement ratio is used to control the first adaptive filter.
Inventors:
SUGIYAMA AKIHIKO (JP)
Application Number:
PCT/JP2017/040166
Publication Date:
May 16, 2019
Filing Date:
November 07, 2017
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H03H21/00; H04R3/02
Domestic Patent References:
| WO2005024787A1 | 2005-03-17 | |||
| WO2012046582A1 | 2012-04-12 |
Foreign References:
| JP2010152021A | 2010-07-08 |
Attorney, Agent or Firm:
KATO Takashi (JP)
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