Title:
SOUND FIELD CONTROLLER
Document Type and Number:
Japanese Patent JP3390654
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a control effect which natural in listening, when a target characteristic is changed when a sound transmission characteristic of a sound is controlled at a control point in a reproduction sound field to a target characteristic.
SOLUTION: A target characteristic update control means 114 divides a target characteristic from a current characteristic to a final characteristic into plural target characteristics, so as to reduce a revision amount upon the receipt of a control signal to revise the target characteristic and changes the target characteristic in a timing set by an output signal of a control error sum from an adder 115 and an output signal of a counter 118 counting number of times of coefficient update of adaptive finite impulse response FIR filters 102, 103. Thus, a sudden increase in control error due to the large change in the target characteristics is prevented, and sound field control which is natural in listening is realized.
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Inventors:
Kazuhiro Nakamura
Application Number:
JP6298698A
Publication Date:
March 24, 2003
Filing Date:
March 13, 1998
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04S1/00; G10K15/00; H03H17/02; H03H21/00; (IPC1-7): H04S1/00
Domestic Patent References:
| JP937398A | ||||
| JP6130973A |
Attorney, Agent or Firm:
Masahiro Kurai