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JPS5542472A - Noise elimination circuit - Google Patents

Noise elimination circuit

Info

Publication number
JPS5542472A
JPS5542472A JP11634978A JP11634978A JPS5542472A JP S5542472 A JPS5542472 A JP S5542472A JP 11634978 A JP11634978 A JP 11634978A JP 11634978 A JP11634978 A JP 11634978A JP S5542472 A JPS5542472 A JP S5542472A
Authority
JP
Japan
Prior art keywords
signal
synthesizer
input
output
video signal
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
JP11634978A
Other languages
Japanese (ja)
Other versions
JPS6142910B2 (en
Inventor
Norio Ebihara
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP11634978A priority Critical patent/JPS5542472A/en
Priority to GB7932462A priority patent/GB2033190B/en
Priority to CA336,033A priority patent/CA1126860A/en
Priority to AU51031/79A priority patent/AU526709B2/en
Priority to NL7907012A priority patent/NL192017C/en
Priority to US06/077,174 priority patent/US4242705A/en
Priority to DE2938130A priority patent/DE2938130C3/en
Priority to FR7923612A priority patent/FR2437130A1/en
Priority to AT0621579A priority patent/AT381817B/en
Publication of JPS5542472A publication Critical patent/JPS5542472A/en
Publication of JPS6142910B2 publication Critical patent/JPS6142910B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To prevent reduction in fidelity to an input signal by a difference signal of an input video signal and its delay signal into several difference signals before supplying them to a non-linear circuit, and then by mixing its output and the input signal together.
CONSTITUTION: An input video signal inputted to terminal 31 is delayed by delay method 32 by N frames and also supplied to synthesizer 33, where the output of delay method 32 is subtracted from the video signal. In accordance with the characteristics of the input signal, signal dividing method 71 divides the output of this synthesizer 33 into several difference signals, which are separately supplied to non- linear circuits (72-1)∼(72-n) for the control of threshold levels, and then synthesized by synthesizer 73. In this way, a noise in accordance with the video pattern of the input signal can be obtained by synthesizer 73 and supplied to synthesizer 35, where it is subtracted from the input signal from terminal 31, so that an output video signal which is high in fidelity to an input video signal and whose noise has well been removed will appear at terminal 36.
COPYRIGHT: (C)1980,JPO&Japio
JP11634978A 1978-09-21 1978-09-21 Noise elimination circuit Granted JPS5542472A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP11634978A JPS5542472A (en) 1978-09-21 1978-09-21 Noise elimination circuit
GB7932462A GB2033190B (en) 1978-09-21 1979-09-19 Video noise reduction system
CA336,033A CA1126860A (en) 1978-09-21 1979-09-20 Noise reduction system for video signals
AU51031/79A AU526709B2 (en) 1978-09-21 1979-09-20 Video noise reduction system
NL7907012A NL192017C (en) 1978-09-21 1979-09-20 Video noise reduction system.
US06/077,174 US4242705A (en) 1978-09-21 1979-09-20 Noise reduction system for video signals
DE2938130A DE2938130C3 (en) 1978-09-21 1979-09-20 System for reducing interference or noise in an image signal
FR7923612A FR2437130A1 (en) 1978-09-21 1979-09-21 PEST REDUCTION DEVICE
AT0621579A AT381817B (en) 1978-09-21 1979-09-21 FAULT SYSTEM NOISE REDUCTION IN AN IMAGE SIGNAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11634978A JPS5542472A (en) 1978-09-21 1978-09-21 Noise elimination circuit

Publications (2)

Publication Number Publication Date
JPS5542472A true JPS5542472A (en) 1980-03-25
JPS6142910B2 JPS6142910B2 (en) 1986-09-24

Family

ID=14684746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11634978A Granted JPS5542472A (en) 1978-09-21 1978-09-21 Noise elimination circuit

Country Status (1)

Country Link
JP (1) JPS5542472A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567276A (en) * 1978-11-15 1980-05-21 Sony Corp Noise removing circuit
JPS60502023A (en) * 1983-08-11 1985-11-21 イ−ストマン　コダック　カンパニ− Transformation processing method to reduce noise in images
JPS6163169A (en) * 1984-09-05 1986-04-01 Matsushita Electric Ind Co Ltd Video signal processor
JPS6170865A (en) * 1984-09-14 1986-04-11 Matsushita Electric Ind Co Ltd Image pickup device
JPH044677A (en) * 1990-04-23 1992-01-09 Matsushita Electric Ind Co Ltd Noise reduction device
JPH07177393A (en) * 1993-12-21 1995-07-14 Matsushita Electric Ind Co Ltd Noise removing device
JPH07177391A (en) * 1993-12-20 1995-07-14 Matsushita Electric Ind Co Ltd Noise removing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992006559A1 (en) * 1990-10-05 1992-04-16 Matsushita Electric Industrial Co., Ltd. Noise reducing apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567276A (en) * 1978-11-15 1980-05-21 Sony Corp Noise removing circuit
JPS625388B2 (en) * 1978-11-15 1987-02-04 Sony Corp
JPS60502023A (en) * 1983-08-11 1985-11-21 イ−ストマン　コダック　カンパニ− Transformation processing method to reduce noise in images
JPS6163169A (en) * 1984-09-05 1986-04-01 Matsushita Electric Ind Co Ltd Video signal processor
JPH0339433B2 (en) * 1984-09-05 1991-06-13 Matsushita Electric Ind Co Ltd
JPS6170865A (en) * 1984-09-14 1986-04-11 Matsushita Electric Ind Co Ltd Image pickup device
JPH044677A (en) * 1990-04-23 1992-01-09 Matsushita Electric Ind Co Ltd Noise reduction device
JPH07177391A (en) * 1993-12-20 1995-07-14 Matsushita Electric Ind Co Ltd Noise removing device
JPH07177393A (en) * 1993-12-21 1995-07-14 Matsushita Electric Ind Co Ltd Noise removing device

Also Published As

Publication number Publication date
JPS6142910B2 (en) 1986-09-24

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