JPS6449482A - Luminance signal processing circuit - Google Patents

Luminance signal processing circuit

Info

Publication number
JPS6449482A
JPS6449482A JP62206785A JP20678587A JPS6449482A JP S6449482 A JPS6449482 A JP S6449482A JP 62206785 A JP62206785 A JP 62206785A JP 20678587 A JP20678587 A JP 20678587A JP S6449482 A JPS6449482 A JP S6449482A
Authority
JP
Japan
Prior art keywords
circuit
signal processing
clamping
level
clipping
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
JP62206785A
Other languages
Japanese (ja)
Inventor
Yuichi Ichikawa
Yoshiaki Kubo
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP62206785A priority Critical patent/JPS6449482A/en
Priority to KR1019880010556A priority patent/KR890004562A/en
Publication of JPS6449482A publication Critical patent/JPS6449482A/en
Pending 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
    • H04N5/213—Circuitry for suppressing or minimising impulsive noise

Landscapes

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

Abstract

PURPOSE:To prevent the fluctuation of the direct current level of a video signal by providing a clipping circuit to remove a noise due to a picture quality correcting circuit to the output terminal of a luminance signal processing circuit. CONSTITUTION:The clipping circuit having a clipping level equal to the clamping voltage of a circuit 9 is inserted between the luminance signal processing circuit composed of a clamping circuit 9 and a picture quality correcting circuit 3 and a mixing circuit 5. When a dummy circuit 15 and a transistor 16 are connected, the clipping level completely equal to the point voltage of a clamped horizontal synchronizing signal can be obtained, and the noise can be surely removed. Consequently, the noise below a clamping level does not exist at the input terminal of the circuit 5, a clamping is executed at a prescribed level, simultaneously, a luminance signal, in which a picture quality correction is executed, can be obtained, the signal is mixed with a chroma signal from a color signal processing circuit 4, and the satisfactory video signal can be obtained at an output terminal 8.
JP62206785A 1987-08-20 1987-08-20 Luminance signal processing circuit Pending JPS6449482A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62206785A JPS6449482A (en) 1987-08-20 1987-08-20 Luminance signal processing circuit
KR1019880010556A KR890004562A (en) 1987-08-20 1988-08-19 Luminance signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62206785A JPS6449482A (en) 1987-08-20 1987-08-20 Luminance signal processing circuit

Publications (1)

Publication Number Publication Date
JPS6449482A true JPS6449482A (en) 1989-02-23

Family

ID=16529055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62206785A Pending JPS6449482A (en) 1987-08-20 1987-08-20 Luminance signal processing circuit

Country Status (2)

Country Link
JP (1) JPS6449482A (en)
KR (1) KR890004562A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221078A (en) * 1983-05-28 1984-12-12 Nippon Hoso Kyokai <Nhk> Contour correcting system of picture signal
JPS60134566A (en) * 1983-12-21 1985-07-17 Mitsubishi Electric Corp Picture quality adjusting circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221078A (en) * 1983-05-28 1984-12-12 Nippon Hoso Kyokai <Nhk> Contour correcting system of picture signal
JPS60134566A (en) * 1983-12-21 1985-07-17 Mitsubishi Electric Corp Picture quality adjusting circuit

Also Published As

Publication number Publication date
KR890004562A (en) 1989-04-22

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