JPS6471287A - Noise reducer - Google Patents

Noise reducer

Info

Publication number
JPS6471287A
JPS6471287A JP62226350A JP22635087A JPS6471287A JP S6471287 A JPS6471287 A JP S6471287A JP 62226350 A JP62226350 A JP 62226350A JP 22635087 A JP22635087 A JP 22635087A JP S6471287 A JPS6471287 A JP S6471287A
Authority
JP
Japan
Prior art keywords
signal
attenuators
noise
field
luminance 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.)
Pending
Application number
JP62226350A
Other languages
Japanese (ja)
Inventor
Akishi Mitsube
Makoto Shiomi
Hiroyasu Otsubo
Hideo Nishijima
Michio Masuda
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62226350A priority Critical patent/JPS6471287A/en
Publication of JPS6471287A publication Critical patent/JPS6471287A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To improve picture quality with small sized and inexpensive constitution by controlling a feedback quantity at a noise reduced part of a luminance signal and a chrominance signal in response to field correlation quantity. CONSTITUTION:A digitized luminance signal is averaged by attenuators 21, 24, an adder 22 and a field memory 23 and the noise is suppressed. The chrominance signal is averaged by attenuators 34, 35, 40, 41, adders 36, 37 and field memories 38, 39 and noise is suppressed. The field correlation quantity of the luminance signal is detected by a correlation detecting circuit 25. The detection signal is given to the attenuators 21, 24, 34, 40 35, 41 as a control signal.
JP62226350A 1987-09-11 1987-09-11 Noise reducer Pending JPS6471287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62226350A JPS6471287A (en) 1987-09-11 1987-09-11 Noise reducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62226350A JPS6471287A (en) 1987-09-11 1987-09-11 Noise reducer

Publications (1)

Publication Number Publication Date
JPS6471287A true JPS6471287A (en) 1989-03-16

Family

ID=16843784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62226350A Pending JPS6471287A (en) 1987-09-11 1987-09-11 Noise reducer

Country Status (1)

Country Link
JP (1) JPS6471287A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02272891A (en) * 1989-04-14 1990-11-07 Hitachi Ltd Chroma noise reducer
JPH043666A (en) * 1990-04-20 1992-01-08 Matsushita Electric Ind Co Ltd Noise eliminating circuit
JPH0576025A (en) * 1991-09-13 1993-03-26 Matsushita Electric Ind Co Ltd Noise reducing device
US5333054A (en) * 1991-12-10 1994-07-26 Kabushiki Kaisha Toshiba Apparatus for reducing noise in a video signal by processing a luminance and chrominance component
WO2010150681A1 (en) * 2009-06-25 2010-12-29 コニカミノルタオプト株式会社 Image input device
JP2016219977A (en) * 2015-05-19 2016-12-22 キヤノン株式会社 Imaging device, imaging system and image processing system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02272891A (en) * 1989-04-14 1990-11-07 Hitachi Ltd Chroma noise reducer
JPH043666A (en) * 1990-04-20 1992-01-08 Matsushita Electric Ind Co Ltd Noise eliminating circuit
JPH0576025A (en) * 1991-09-13 1993-03-26 Matsushita Electric Ind Co Ltd Noise reducing device
US5333054A (en) * 1991-12-10 1994-07-26 Kabushiki Kaisha Toshiba Apparatus for reducing noise in a video signal by processing a luminance and chrominance component
WO2010150681A1 (en) * 2009-06-25 2010-12-29 コニカミノルタオプト株式会社 Image input device
JP5704069B2 (en) * 2009-06-25 2015-04-22 コニカミノルタ株式会社 Image input device
JP2016219977A (en) * 2015-05-19 2016-12-22 キヤノン株式会社 Imaging device, imaging system and image processing system

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