JPS5713884A - Hue control circuit - Google Patents

Hue control circuit

Info

Publication number
JPS5713884A
JPS5713884A JP8710180A JP8710180A JPS5713884A JP S5713884 A JPS5713884 A JP S5713884A JP 8710180 A JP8710180 A JP 8710180A JP 8710180 A JP8710180 A JP 8710180A JP S5713884 A JPS5713884 A JP S5713884A
Authority
JP
Japan
Prior art keywords
hue
phase
supplied
circuit
chrominance 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
JP8710180A
Other languages
Japanese (ja)
Other versions
JPS6361834B2 (en
Inventor
Sadaaki Tanaka
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP8710180A priority Critical patent/JPS5713884A/en
Publication of JPS5713884A publication Critical patent/JPS5713884A/en
Publication of JPS6361834B2 publication Critical patent/JPS6361834B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/643—Hue control means, e.g. flesh tone control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To control the hue of a chrominance signal on the carrier wave with simple constitution by supplying two 90 deg. out-of-phase input chrominance signals to two variable gain circuits and by adding the outputs of those variable gain circuits together. CONSTITUTION:An input chrominance signal is supplied to a balanced modulator 1, and another chrominance signal shifted in phase via a 90 deg. phase-shifting circuit 7 is supplied to a balanced modulator 2. Then, the outputs of the modulators 1 and 2 are supplied to and added together by an adding circuit 8, thereby obtaining a hue-controlled output carrier from an output terminal 9. To control phase shifts of the modulators 1 and 2 with this circuit constitution, a gain control signal generating circuit 5 generates a gain control signal (a) varying linearly and a gain control signal (b') varying in an arc shape under the control of a potentiometer 12 and then supplies them to the circuits 1 and 2 respectively. Thus, the hue of the chrominance signal on the carrier wave is controlled over a 0-180 deg. range.
JP8710180A 1980-06-26 1980-06-26 Hue control circuit Granted JPS5713884A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8710180A JPS5713884A (en) 1980-06-26 1980-06-26 Hue control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8710180A JPS5713884A (en) 1980-06-26 1980-06-26 Hue control circuit

Publications (2)

Publication Number Publication Date
JPS5713884A true JPS5713884A (en) 1982-01-23
JPS6361834B2 JPS6361834B2 (en) 1988-11-30

Family

ID=13905551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8710180A Granted JPS5713884A (en) 1980-06-26 1980-06-26 Hue control circuit

Country Status (1)

Country Link
JP (1) JPS5713884A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533939A (en) * 1983-03-22 1985-08-06 U.S. Philips Corporation Integrable hue control circuit having a d.c. setting element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0251440U (en) * 1988-10-04 1990-04-11
JPH0251432U (en) * 1988-10-05 1990-04-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533939A (en) * 1983-03-22 1985-08-06 U.S. Philips Corporation Integrable hue control circuit having a d.c. setting element

Also Published As

Publication number Publication date
JPS6361834B2 (en) 1988-11-30

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