JPS57127375A - Vertical contour compensating circuit - Google Patents

Vertical contour compensating circuit

Info

Publication number
JPS57127375A
JPS57127375A JP56011637A JP1163781A JPS57127375A JP S57127375 A JPS57127375 A JP S57127375A JP 56011637 A JP56011637 A JP 56011637A JP 1163781 A JP1163781 A JP 1163781A JP S57127375 A JPS57127375 A JP S57127375A
Authority
JP
Japan
Prior art keywords
signal
signals
delaying
vertical
added
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
JP56011637A
Other languages
Japanese (ja)
Inventor
Ichiro Hori
Yukihiro Adachi
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.)
Ikegami Tsushinki Co Ltd
Original Assignee
Ikegami Tsushinki 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 Ikegami Tsushinki Co Ltd filed Critical Ikegami Tsushinki Co Ltd
Priority to JP56011637A priority Critical patent/JPS57127375A/en
Publication of JPS57127375A publication Critical patent/JPS57127375A/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
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction

Abstract

PURPOSE:To obtain a vertical contour compensation signal from a color signal given from a subject of any color component, by supplying a green signal delayed by a horizontal scan period plus red and blue signals and processing the signal having the prescribed relation of level through the selection and mixture. CONSTITUTION:A green signal G which is previously advanced more than red and blue signals R and B by a horizontal scan period (1H) plus a signal G' obtained by delaying 4 the signal G by 1H are led to a vertical front edge signal generating circuit 5. Then the signal G is subtracted from the signal G' to obtain a vertical front edge signal I. The signals R, G' and B of the same phase are applied to an amplitude selecting/mixing circuit 6 to extract a color signal H having the heighest amplitude level. This signal H and a signal J obtained by delaying 7 the signal H by 1H are applied to a verticle rear edge signal generating circuit 8. The circuit 8 produces a signal L having the timing of a vertical rear edge. Then the signal L is added 10 with a signal K obtained by delaying 9 the signal I with a coincidence of phase. An added output signal M receives the waveform shaping 11 to be added 11-14 with the signals obtained by delaying the signals R, G' and B each to deliver signals O, P and Q having the compensated vertical contours respectively.
JP56011637A 1981-01-30 1981-01-30 Vertical contour compensating circuit Pending JPS57127375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56011637A JPS57127375A (en) 1981-01-30 1981-01-30 Vertical contour compensating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56011637A JPS57127375A (en) 1981-01-30 1981-01-30 Vertical contour compensating circuit

Publications (1)

Publication Number Publication Date
JPS57127375A true JPS57127375A (en) 1982-08-07

Family

ID=11783452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56011637A Pending JPS57127375A (en) 1981-01-30 1981-01-30 Vertical contour compensating circuit

Country Status (1)

Country Link
JP (1) JPS57127375A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672430A (en) * 1985-02-08 1987-06-09 Sony Corporation Color television camera using the green signal for vertical enhancement and the green and another signal for horizontal enhancement
US5227869A (en) * 1990-08-20 1993-07-13 Ikegami Tsushinki Co., Ltd. Method for correcting contour of image
US6266088B1 (en) 1996-07-15 2001-07-24 Nec Corporation Method of edge crispening in color image sensor and circuit for carrying out the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324189U (en) * 1976-08-09 1978-03-01
JPS551756A (en) * 1978-06-19 1980-01-08 Nippon Telegr & Teleph Corp <Ntt> Drive circuit for field effect transistor
JPS5533333A (en) * 1978-08-30 1980-03-08 Hitachi Denshi Ltd Signal generator for 2-channel input contour correction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324189U (en) * 1976-08-09 1978-03-01
JPS551756A (en) * 1978-06-19 1980-01-08 Nippon Telegr & Teleph Corp <Ntt> Drive circuit for field effect transistor
JPS5533333A (en) * 1978-08-30 1980-03-08 Hitachi Denshi Ltd Signal generator for 2-channel input contour correction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672430A (en) * 1985-02-08 1987-06-09 Sony Corporation Color television camera using the green signal for vertical enhancement and the green and another signal for horizontal enhancement
US5227869A (en) * 1990-08-20 1993-07-13 Ikegami Tsushinki Co., Ltd. Method for correcting contour of image
US6266088B1 (en) 1996-07-15 2001-07-24 Nec Corporation Method of edge crispening in color image sensor and circuit for carrying out the same

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