JPS5534553A - Pulsative noise reduction system - Google Patents

Pulsative noise reduction system

Info

Publication number
JPS5534553A
JPS5534553A JP10712478A JP10712478A JPS5534553A JP S5534553 A JPS5534553 A JP S5534553A JP 10712478 A JP10712478 A JP 10712478A JP 10712478 A JP10712478 A JP 10712478A JP S5534553 A JPS5534553 A JP S5534553A
Authority
JP
Japan
Prior art keywords
circuit
noise
signal
switch
period
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
JP10712478A
Other languages
Japanese (ja)
Other versions
JPS6258181B2 (en
Inventor
Masahiro Watanabe
Hiroshi Horikawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10712478A priority Critical patent/JPS5534553A/en
Priority to US06/056,002 priority patent/US4311963A/en
Priority to DE2929030A priority patent/DE2929030C2/en
Publication of JPS5534553A publication Critical patent/JPS5534553A/en
Publication of JPS6258181B2 publication Critical patent/JPS6258181B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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

Abstract

PURPOSE:To increase the noise reduction effect for the pulsative noise elimination circuit by giving the linear interpolation to the signals for the period when the noise exists. CONSTITUTION:Switch control signal generation circuit 7 generates control pulses SA, SB and SC via the output pulse equal to the noise pulse duration in the input signal S(t) generated from noise detection circuit 6. Input signal S(t-TD') passed through timing control delay circuit 8 is converted via switch 9 and holding circuit 10 into signal S'(t-TD') which holds the signal level immediately before the front edge of the noise during the noise period. At the same time, the level equal to the inclination of the staight line to give the interpolation to the noise period is held via switch 11, holding circuit 12, difference circuit 14, switch 15 and holding circuit 16 each. This level is then integrated at correction signal circuit 17 to be changed into correction signal h. Signal h is then compounded with signal S(t- TD'-TD) passed through delay circuit 13 at sum circuit 18 to obtain signal i the noise of which is reduced.
JP10712478A 1978-07-18 1978-08-31 Pulsative noise reduction system Granted JPS5534553A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10712478A JPS5534553A (en) 1978-08-31 1978-08-31 Pulsative noise reduction system
US06/056,002 US4311963A (en) 1978-07-18 1979-07-09 Noise pulse suppressing system
DE2929030A DE2929030C2 (en) 1978-07-18 1979-07-18 Glitch suppression system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10712478A JPS5534553A (en) 1978-08-31 1978-08-31 Pulsative noise reduction system

Publications (2)

Publication Number Publication Date
JPS5534553A true JPS5534553A (en) 1980-03-11
JPS6258181B2 JPS6258181B2 (en) 1987-12-04

Family

ID=14451095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10712478A Granted JPS5534553A (en) 1978-07-18 1978-08-31 Pulsative noise reduction system

Country Status (1)

Country Link
JP (1) JPS5534553A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862097A (en) * 1987-01-23 1989-08-29 Clarion, Co., Ltd. Pulsating noise removal device
EP1860781A1 (en) * 2005-03-17 2007-11-28 Pioneer Corporation Noise canceller
EP1860780A1 (en) * 2005-03-16 2007-11-28 Pioneer Corporation Noise canceller

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862097A (en) * 1987-01-23 1989-08-29 Clarion, Co., Ltd. Pulsating noise removal device
EP1860780A1 (en) * 2005-03-16 2007-11-28 Pioneer Corporation Noise canceller
EP1860780A4 (en) * 2005-03-16 2010-06-09 Pioneer Corp Noise canceller
EP1860781A1 (en) * 2005-03-17 2007-11-28 Pioneer Corporation Noise canceller
EP1860781A4 (en) * 2005-03-17 2010-06-09 Pioneer Corp Noise canceller

Also Published As

Publication number Publication date
JPS6258181B2 (en) 1987-12-04

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