JPS57184335A - Noise eliminating device - Google Patents

Noise eliminating device

Info

Publication number
JPS57184335A
JPS57184335A JP56069819A JP6981981A JPS57184335A JP S57184335 A JPS57184335 A JP S57184335A JP 56069819 A JP56069819 A JP 56069819A JP 6981981 A JP6981981 A JP 6981981A JP S57184335 A JPS57184335 A JP S57184335A
Authority
JP
Japan
Prior art keywords
circuit
noise
input
signal
terminal
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.)
Granted
Application number
JP56069819A
Other languages
Japanese (ja)
Other versions
JPS627742B2 (en
Inventor
Koji Niimi
Takayasu Kondo
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP56069819A priority Critical patent/JPS57184335A/en
Priority to US06/373,437 priority patent/US4587620A/en
Publication of JPS57184335A publication Critical patent/JPS57184335A/en
Publication of JPS627742B2 publication Critical patent/JPS627742B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth

Abstract

PURPOSE:To ensure the sufficient noise suppressing effect even to the noise of a long period of time, by reading successively waveform parameters which are previously stored and producing a signal based on the readout parameter in the form of a substitute signal. CONSTITUTION:A input signal Xj is delayed by a delaying circuit 74 and then a delaying circuit 124 to be fed to the X1 input of a signal switching circuit 3. A substitute signal generating circuit 4 incorporates a circuit that storing previously waveform parameters, and these parameters are successively read by a noise detection trigger to be applied to an X2 terminal of the circuit 3 in the form of the substitute signal. The circuit 3 leads the input of an X1 terminal to an output terminal Yn when no noise is detected, and leads the input of an X2 terminal to an output terminal Ym when the noise trigger is applied to eliminate the noise.
JP56069819A 1981-05-09 1981-05-09 Noise eliminating device Granted JPS57184335A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56069819A JPS57184335A (en) 1981-05-09 1981-05-09 Noise eliminating device
US06/373,437 US4587620A (en) 1981-05-09 1982-04-30 Noise elimination device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56069819A JPS57184335A (en) 1981-05-09 1981-05-09 Noise eliminating device

Publications (2)

Publication Number Publication Date
JPS57184335A true JPS57184335A (en) 1982-11-13
JPS627742B2 JPS627742B2 (en) 1987-02-19

Family

ID=13413741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56069819A Granted JPS57184335A (en) 1981-05-09 1981-05-09 Noise eliminating device

Country Status (1)

Country Link
JP (1) JPS57184335A (en)

Also Published As

Publication number Publication date
JPS627742B2 (en) 1987-02-19

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