Title:
不要音信号除去装置
Document Type and Number:
Japanese Patent JP4162860
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To immediately eliminate an audio sound signal and carry out speech recognition even when a state changes from a hands-free talking state into an audio state. SOLUTION: A microphone 71 detects sounds inside a vehicle outputted from a loudspeaker 52 and a human speaker. An unwanted sound signal eliminating section 73 generates a signal corresponding to an audio reproducing sound with an adaptive signal processing and eliminates the generated signal from the detected signal and then inputs the resultant signal into a speech recognizing device 74 in a first status (audio state), and generates a signal corresponding to the sound outputted from a loudspeaker for a receiver speech 52FR with the adaptive signal processing and eliminates the generated signal from the detected signal and inputs the resultant signal into a transmitter 75 in a second state (calling state). When the state changes from the first state into the second state, an adaptive filter parameter updated by the adaptive signal processing in the first state is stored in a parameter storage section 83, and when the state changes from the second state into the first state, the stored adaptive filter parameter is set on the adaptive filter and the adaptive signal processing is carried out.
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Inventors:
Koichi Nakata
Shingo Kiuchi
Toshiaki Asano
Toru Marumoto
Nozomi Saito
Shingo Kiuchi
Toshiaki Asano
Toru Marumoto
Nozomi Saito
Application Number:
JP2001004845A
Publication Date:
October 08, 2008
Filing Date:
January 12, 2001
Export Citation:
Assignee:
Alpine Electronics Co., Ltd.
International Classes:
G10L15/20; G10L15/00; G10L21/0208; H03H21/00; H04B3/23; H04M1/60; H04M1/62; H04R3/00
Domestic Patent References:
| JP200089799A | ||||
| JP695694A | ||||
| JP10160501A |
Attorney, Agent or Firm:
Chimitsu Saito