JPS5691590A - Picture quality regulating circuit - Google Patents

Picture quality regulating circuit

Info

Publication number
JPS5691590A
JPS5691590A JP16977879A JP16977879A JPS5691590A JP S5691590 A JPS5691590 A JP S5691590A JP 16977879 A JP16977879 A JP 16977879A JP 16977879 A JP16977879 A JP 16977879A JP S5691590 A JPS5691590 A JP S5691590A
Authority
JP
Japan
Prior art keywords
signal
white
supplied
profile
circuit
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
JP16977879A
Other languages
Japanese (ja)
Other versions
JPS6248947B2 (en
Inventor
Kanji Oda
Tomoharu Genba
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16977879A priority Critical patent/JPS5691590A/en
Publication of JPS5691590A publication Critical patent/JPS5691590A/en
Publication of JPS6248947B2 publication Critical patent/JPS6248947B2/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
    • H04N5/20—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

Landscapes

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

Abstract

PURPOSE:To obtain an invariably picture of high quality by preventing a blooming state, by suppressing the white side compontents of a profile-corrected signal only when a transient signal in terms of the white side is supplied to CRT excessively. CONSTITUTION:A video signal applied to input terminal 21 is supplied to profile signal shaping circuit 22, which generates a profile-corrected signal. The profile- corrected signal is supplied to white peack signal suppressing circuit 24 suppresses white side high frequency components. The signal applied to input terminal 21, on the other hand, is further supplied to LPF25 to extract low frequency components and white-side high frequency components suppressed are mixed by synthesizing circuit 26. Circuit 24 utilizes the difference in impedance between points a7 and a8 due to the one-off operation of diode D21 to turn on-off according to the collector potential of transistor Q23. Its operation range is set when the signal level of input terminal 21 is high and the white-side transient signal is supplied to CRT excessively. This depends upon resistance values of resistances R33 and R34.
JP16977879A 1979-12-26 1979-12-26 Picture quality regulating circuit Granted JPS5691590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16977879A JPS5691590A (en) 1979-12-26 1979-12-26 Picture quality regulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16977879A JPS5691590A (en) 1979-12-26 1979-12-26 Picture quality regulating circuit

Publications (2)

Publication Number Publication Date
JPS5691590A true JPS5691590A (en) 1981-07-24
JPS6248947B2 JPS6248947B2 (en) 1987-10-16

Family

ID=15892680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16977879A Granted JPS5691590A (en) 1979-12-26 1979-12-26 Picture quality regulating circuit

Country Status (1)

Country Link
JP (1) JPS5691590A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109479A (en) * 1980-12-26 1982-07-07 Sony Corp Picture quality adjusting circuit
JPS5912678A (en) * 1982-07-12 1984-01-23 Sanyo Electric Co Ltd Picture quality adjusting circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046034A (en) * 1973-08-28 1975-04-24
JPS53102317U (en) * 1977-01-21 1978-08-18

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046034A (en) * 1973-08-28 1975-04-24
JPS53102317U (en) * 1977-01-21 1978-08-18

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109479A (en) * 1980-12-26 1982-07-07 Sony Corp Picture quality adjusting circuit
JPH021428B2 (en) * 1980-12-26 1990-01-11 Sony Corp
JPS5912678A (en) * 1982-07-12 1984-01-23 Sanyo Electric Co Ltd Picture quality adjusting circuit
JPH023588B2 (en) * 1982-07-12 1990-01-24 Sanyo Electric Co

Also Published As

Publication number Publication date
JPS6248947B2 (en) 1987-10-16

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