Title:
AUDIO DEVICE
Document Type and Number:
Japanese Patent JP3701441
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To detect abnormality of an audio device provided with an adaptive equalizer control function and to prevent the audio device from breaking.
SOLUTION: The abnormality of the audio device provided with a adaptive equalizer control function is detected by using an adaptive filter coefficient or an adaptive filter output or a microphone detection signal at the time of identifying the coefficient of the adaptive filter 56b or identifying a transmission characteristic from a control sound source 57 to a microphone 53. When abnormality occurs in the audio device at the time of identifying the coefficient of the adaptive filter 56b, the adaptive filter coefficient becomes large and the adaptive filter output also becomes large and the microphone detection signal becomes small. Thus, considering it, the abnormality of the audio device is detected.
Inventors:
Kiyoshi Nakamura
Tomohiko Ise
Nozomi Saito
Tomohiko Ise
Nozomi Saito
Application Number:
JP23681997A
Publication Date:
September 28, 2005
Filing Date:
September 02, 1997
Export Citation:
Assignee:
Alpine Electronics Co., Ltd.
International Classes:
G10K15/00; H03G3/32; H03G5/16; H03H17/02; H03H17/06; H03H21/00; H04B3/23; (IPC1-7): H03G5/16; G10K15/00; H03G3/32; H03H17/02; H03H17/06; H03H21/00; H04B3/23
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| JP3274818A | ||||
| JP7106919A | ||||
| JP7064573A | ||||
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Attorney, Agent or Firm:
Chimitsu Saito