Title:
適応ノッチフィルタを利用したハウリング抑制装置
Document Type and Number:
Japanese Patent JP3558954
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a howling suppression device capable of reducing an operation scale and shortening operation time. SOLUTION: In this howling suppression device provided with a digital filter 4 for turning a howling frequency included in digital input signals to a removal frequency and a control part DSP for detecting the howling frequency and setting the center frequency of the digital filter 4 to the howling frequency, the control part DSP is provided with an adaptive notch filter 12 for detecting the howling frequency.
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Inventors:
Daisuke Higashihara
Application Number:
JP2000093052A
Publication Date:
August 25, 2004
Filing Date:
March 30, 2000
Export Citation:
Assignee:
TOA Co., Ltd.
International Classes:
H04R3/02; G10L21/0208; G10L21/0224; G10L25/00; H03H21/00; (IPC1-7): H04R3/02; G10L11/00; G10L21/02; H03H21/00
Domestic Patent References:
| JP10173491A | ||||
| JP11325168A | ||||
| JP11212597A |
Attorney, Agent or Firm:
Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka
Shosuke Imai
Tadashi Masui
Tadahiko Kurita
Yasushi Kobayashi
Hideo Tanaka