JPS575439A - Impulse noise rejector - Google Patents

Impulse noise rejector

Info

Publication number
JPS575439A
JPS575439A JP7985980A JP7985980A JPS575439A JP S575439 A JPS575439 A JP S575439A JP 7985980 A JP7985980 A JP 7985980A JP 7985980 A JP7985980 A JP 7985980A JP S575439 A JPS575439 A JP S575439A
Authority
JP
Japan
Prior art keywords
impulse
impulse noise
signal
noise
circuit
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
JP7985980A
Other languages
Japanese (ja)
Inventor
Toshihiko Kono
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 JP7985980A priority Critical patent/JPS575439A/en
Publication of JPS575439A publication Critical patent/JPS575439A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking

Landscapes

  • Polyamides (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To reject impulse noise without giving much damage to an original signal, by outputting an input signal as it is when no impulse noise is superimposed and rejecting the high-frequency band component by noise period if any impulse noise is superimposed. CONSTITUTION:An input signal is respectively applied to low- and high-pass filters 11, 12 via a buffer 20 and a delay circuit 21. On the other hand, the impulse noise component included in a music signal in the buffer 20 is detected at an impulse detecting circuit 22 and applied to a switch circuit 14 as a control signal via a driving circuit 23. The low-pass filter 11 has a transfer function F(s) as shown in (a) which rejects impulse noises. Further, since the high-pass filter 12 has a complementary transfer function 1-F(s) as shown in (b), the contact of a switch 14 is closed if no impulse noise is included in the music signal, allowing to reject impulse noises effectively without giving damage to the music signal as shown in (c).
JP7985980A 1980-06-13 1980-06-13 Impulse noise rejector Pending JPS575439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7985980A JPS575439A (en) 1980-06-13 1980-06-13 Impulse noise rejector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7985980A JPS575439A (en) 1980-06-13 1980-06-13 Impulse noise rejector

Publications (1)

Publication Number Publication Date
JPS575439A true JPS575439A (en) 1982-01-12

Family

ID=13701917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7985980A Pending JPS575439A (en) 1980-06-13 1980-06-13 Impulse noise rejector

Country Status (1)

Country Link
JP (1) JPS575439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135081A2 (en) * 1983-07-30 1985-03-27 Victor Company Of Japan, Limited Noise reduction by linear interpolation using a dual function amplifier circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135081A2 (en) * 1983-07-30 1985-03-27 Victor Company Of Japan, Limited Noise reduction by linear interpolation using a dual function amplifier circuit

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