JPS6430400A - Acoustic signal processing circuit - Google Patents

Acoustic signal processing circuit

Info

Publication number
JPS6430400A
JPS6430400A JP18728287A JP18728287A JPS6430400A JP S6430400 A JPS6430400 A JP S6430400A JP 18728287 A JP18728287 A JP 18728287A JP 18728287 A JP18728287 A JP 18728287A JP S6430400 A JPS6430400 A JP S6430400A
Authority
JP
Japan
Prior art keywords
acoustic signal
residual difference
input
signal
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18728287A
Other languages
Japanese (ja)
Inventor
Kenzo Akagiri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP18728287A priority Critical patent/JPS6430400A/en
Publication of JPS6430400A publication Critical patent/JPS6430400A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To well suppress an unnecessary signal with simple constitution by controlling an input signal based on the residual difference to a value predicted by using a predicting filter. CONSTITUTION:An input acoustic signal (input terminal 1) is supplied to the predicting filter 4, and a residual difference for the input acoustic signal to a value predicted by the filter is obtained, to control (variable gain control circuit 2) an input acoustic signal based on the said residual difference. As a result, a noise from the external can be extremely accurately discriminated. Since a normal acoustic signal such as daily conersation gives a small residual difference between a predicted signal and an input signal, the gain of the variable gain control circuit 2 is made larger and also because said residual difference come larger in case of an external noise, the external noise can be suppressed by lowering the gain of the circuit 2.
JP18728287A 1987-07-27 1987-07-27 Acoustic signal processing circuit Pending JPS6430400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18728287A JPS6430400A (en) 1987-07-27 1987-07-27 Acoustic signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18728287A JPS6430400A (en) 1987-07-27 1987-07-27 Acoustic signal processing circuit

Publications (1)

Publication Number Publication Date
JPS6430400A true JPS6430400A (en) 1989-02-01

Family

ID=16203269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18728287A Pending JPS6430400A (en) 1987-07-27 1987-07-27 Acoustic signal processing circuit

Country Status (1)

Country Link
JP (1) JPS6430400A (en)

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