FI990865A - Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal - Google Patents

Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal Download PDF

Info

Publication number
FI990865A
FI990865A FI990865A FI990865A FI990865A FI 990865 A FI990865 A FI 990865A FI 990865 A FI990865 A FI 990865A FI 990865 A FI990865 A FI 990865A FI 990865 A FI990865 A FI 990865A
Authority
FI
Finland
Prior art keywords
signal
noise
frequency
canceller
subtracting
Prior art date
Application number
FI990865A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI118022B (en
FI990865A0 (en
Inventor
Joji Kane
Akira Nohara
Original Assignee
Matsushita Electric Ind Co Ltd
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
Priority claimed from JP2008593A external-priority patent/JPH03212697A/en
Priority claimed from JP2008594A external-priority patent/JP2830276B2/en
Priority claimed from JP2033209A external-priority patent/JP2836889B2/en
Priority claimed from FI910292A external-priority patent/FI104663B/en
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to FI990865A priority Critical patent/FI118022B/en
Publication of FI990865A publication Critical patent/FI990865A/en
Publication of FI990865A0 publication Critical patent/FI990865A0/en
Application granted granted Critical
Publication of FI118022B publication Critical patent/FI118022B/en

Links

Abstract

The processor includes frequency analyser for inputting a signal containing a noise to perform frequency analysis, a signal detector and noise predictor for inputting the frequency-analysed signal to predict the noise of the signal portion on the basis of a past noise information. A canceller is provided for subtracting the predicted noise from the frequency-analysed signal, and signal compositor for performing signal composition on the noise-cancelled signal. The frequency-analysed output of the frequency analyser and a cancel coefficient signal are provided to cancel the noise component considering the cancel coefficient from the frequency-analysed output. The signal compositor composes the cancelled-output of the canceller.
FI990865A 1990-01-18 1999-04-16 Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal FI118022B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI990865A FI118022B (en) 1990-01-18 1999-04-16 Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP2008593A JPH03212697A (en) 1990-01-18 1990-01-18 Signal processor
JP859390 1990-01-18
JP859490 1990-01-18
JP2008594A JP2830276B2 (en) 1990-01-18 1990-01-18 Signal processing device
JP3320990 1990-02-13
JP3321290 1990-02-13
JP3321290 1990-02-13
JP2033209A JP2836889B2 (en) 1990-02-13 1990-02-13 Signal processing device
FI910292A FI104663B (en) 1990-01-18 1991-01-18 signal Processing device
FI910292 1991-01-18
FI990865A FI118022B (en) 1990-01-18 1999-04-16 Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal
FI990865 1999-04-16

Publications (3)

Publication Number Publication Date
FI990865A true FI990865A (en) 1999-04-16
FI990865A0 FI990865A0 (en) 1999-04-16
FI118022B FI118022B (en) 2007-05-31

Family

ID=27514634

Family Applications (1)

Application Number Title Priority Date Filing Date
FI990865A FI118022B (en) 1990-01-18 1999-04-16 Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal

Country Status (1)

Country Link
FI (1) FI118022B (en)

Also Published As

Publication number Publication date
FI118022B (en) 2007-05-31
FI990865A0 (en) 1999-04-16

Similar Documents

Publication Publication Date Title
CA2034354A1 (en) Signal processing device
EP0548054A3 (en)
MY124227A (en) Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting system
IT1250130B (en) RECEIVING APPARATUS.
NO953169L (en) Noise Reduction
MY111134A (en) Voice activity detector.
TW262620B (en) Decreasing noise method of speech signal and detecting method of noise segment
DE3167427D1 (en) Actuation device for an acoustic emission measuring system using the detection of the background noise
HK1097080A1 (en) Complex signal activity detection for improved speech/noise classification of an audio signal
DK243488A (en) LINEAR, PREVIEWING ECO BALANCING UNIT, INTEGRATED WITH A RELP VOTE CODE
SE8206641D0 (en) DIGITAL PROCESSOR
SE8201598L (en) DEVICE FOR REDUCING THE SOUND IN A SOUND SIGNAL
SE9803636D0 (en) Nonlinear processor for acoustic echo cancels
JP2000200099A5 (en)
DE50010504D1 (en) Exponential echo and noise reduction in speech pauses
DE69531214D1 (en) METHOD AND RECEIVER FOR INTERFERENCE SUPPRESSION
FI990865A (en) Signal processor for noise suppression system - has canceller for subtracting protected noise from frequency analyser signal
SG77611A1 (en) Acoustic echo cancellation equipped with howling suppressor and double-talk detector
SE8205840L (en) echo canceller
GB9122563D0 (en) Circuit for echo and noise suppression of acoustic signals transmitted through a drillstring
GB2007945A (en) Record noise suppression system
MX9706033A (en) Voice activity detection.
PL235470A2 (en) System for determination of coefficients of attenuation,absorption and reflection of acoustical signals from electric discharges
TW296528B (en) Method and apparatus for detecting a near-end speech signal

Legal Events

Date Code Title Description
FG Patent granted

Ref document number: 118022

Country of ref document: FI