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JPS57193180A - Noise reducing device - Google Patents

Noise reducing device

Info

Publication number
JPS57193180A
JPS57193180A JP56077925A JP7792581A JPS57193180A JP S57193180 A JPS57193180 A JP S57193180A JP 56077925 A JP56077925 A JP 56077925A JP 7792581 A JP7792581 A JP 7792581A JP S57193180 A JPS57193180 A JP S57193180A
Authority
JP
Japan
Prior art keywords
noise
signal
edge
component
picture 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
JP56077925A
Other languages
Japanese (ja)
Other versions
JPH0337351B2 (en
Inventor
Yuichi Ninomiya
Yoshimichi Otsuka
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.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting 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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP56077925A priority Critical patent/JPS57193180A/en
Priority to US06/373,268 priority patent/US4500911A/en
Publication of JPS57193180A publication Critical patent/JPS57193180A/en
Publication of JPH0337351B2 publication Critical patent/JPH0337351B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

PURPOSE:To realize the satisfactory reduction of noise even to a moving picture, by adding the component eliminated through an LPF to the filter output picture signal of the LPF in accordance with the result of detection given to the edge signal component of the input picture signal. CONSTITUTION:A picture signals supplied through an input terminal are supplied in parallel to an LPF1, a horizontal edge detector 2 and a vertical edge detector 3, respectively. The filter output picture signal of the LPF1 and the input picture signal are fed to a subtractor 5. Then the noise component of a flat part and the edge signal component containing the noise are extracted and supplied to a multiplier 6 to be multiplied by the edge component signal given from the adder 4. Thus only the edge component containing the noise is emphasized. As a result, the edge signal component containing the noise is gated and extracted to be added 7 with the filter output picture signal of the LPF1. Thus a picture signal from which the noise of a least the flat part is satisfactorily eliminated can be extracted.
JP56077925A 1981-05-25 1981-05-25 Noise reducing device Granted JPS57193180A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56077925A JPS57193180A (en) 1981-05-25 1981-05-25 Noise reducing device
US06/373,268 US4500911A (en) 1981-05-25 1982-04-29 Noise reduction apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56077925A JPS57193180A (en) 1981-05-25 1981-05-25 Noise reducing device

Publications (2)

Publication Number Publication Date
JPS57193180A true JPS57193180A (en) 1982-11-27
JPH0337351B2 JPH0337351B2 (en) 1991-06-05

Family

ID=13647661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56077925A Granted JPS57193180A (en) 1981-05-25 1981-05-25 Noise reducing device

Country Status (1)

Country Link
JP (1) JPS57193180A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60216674A (en) * 1983-06-24 1985-10-30 アールシーエー　トムソン　ライセンシング　コーポレイシヨン Digital signal processor
JPS62272672A (en) * 1986-05-20 1987-11-26 Sanyo Electric Co Ltd Noise reducer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883726A (en) * 1972-02-09 1973-11-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883726A (en) * 1972-02-09 1973-11-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60216674A (en) * 1983-06-24 1985-10-30 アールシーエー　トムソン　ライセンシング　コーポレイシヨン Digital signal processor
JPS62272672A (en) * 1986-05-20 1987-11-26 Sanyo Electric Co Ltd Noise reducer

Also Published As

Publication number Publication date
JPH0337351B2 (en) 1991-06-05

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