JPS5784627A - Inpulse noise eliminating device - Google Patents

Inpulse noise eliminating device

Info

Publication number
JPS5784627A
JPS5784627A JP16031680A JP16031680A JPS5784627A JP S5784627 A JPS5784627 A JP S5784627A JP 16031680 A JP16031680 A JP 16031680A JP 16031680 A JP16031680 A JP 16031680A JP S5784627 A JPS5784627 A JP S5784627A
Authority
JP
Japan
Prior art keywords
noise
signal
width
time
output
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
JP16031680A
Other languages
Japanese (ja)
Inventor
Toshihiko Kono
Juro Hoshi
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 JP16031680A priority Critical patent/JPS5784627A/en
Publication of JPS5784627A publication Critical patent/JPS5784627A/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

  • Noise Elimination (AREA)

Abstract

PURPOSE:To perform interpolation only for noise section, by changing the integration time constant according to the time width of noise, in eliminating pulsive noise included in reproduced sound by means of a ramp wave interpolation system using integration. CONSTITUTION:When a signal S(t) with noise N is inputted to an input terminal 4, an output (b) delayed by time TD is obtained at an analog delay circuit 7, the noise N is detected at a detection control circuit 3 and a signal (c) corresponding to noise width TN is obtained from a comparator 19. The signal level immediately before and after the noise is held in sample holding circuits 12-1,2 in the timing of rise and fall of the pulse signal to obtain outputs (e), (f), and the level difference of the signals (e), (f) is taken in the timing of a signal (d) delayed by a time TD for the signal (c) and integrated at an integrator 14. For the time constant of the integrator, a resistor VR is controlled with the output of a pulse width-voltage conversion circuit, a ramp wave (h) proportional to noise width is generated, and it is added with the output (i) of a sample holding circuit 15 at a summing amplifier 16 to obtain an interpolation signal (j).
JP16031680A 1980-11-14 1980-11-14 Inpulse noise eliminating device Pending JPS5784627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16031680A JPS5784627A (en) 1980-11-14 1980-11-14 Inpulse noise eliminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16031680A JPS5784627A (en) 1980-11-14 1980-11-14 Inpulse noise eliminating device

Publications (1)

Publication Number Publication Date
JPS5784627A true JPS5784627A (en) 1982-05-27

Family

ID=15712312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16031680A Pending JPS5784627A (en) 1980-11-14 1980-11-14 Inpulse noise eliminating device

Country Status (1)

Country Link
JP (1) JPS5784627A (en)

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