JPS55154891A - Automatic hue correcting circuit - Google Patents

Automatic hue correcting circuit

Info

Publication number
JPS55154891A
JPS55154891A JP6223679A JP6223679A JPS55154891A JP S55154891 A JPS55154891 A JP S55154891A JP 6223679 A JP6223679 A JP 6223679A JP 6223679 A JP6223679 A JP 6223679A JP S55154891 A JPS55154891 A JP S55154891A
Authority
JP
Japan
Prior art keywords
axial
phase
circuit
demodulator
demodulation
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
JP6223679A
Other languages
Japanese (ja)
Inventor
Yukio Okabe
Yasuaki Watabe
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP6223679A priority Critical patent/JPS55154891A/en
Publication of JPS55154891A publication Critical patent/JPS55154891A/en
Pending 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 make it possible to reproduce visually-natural color reproduced pictures by correcting hues continuous to a hue high in visual sensitivity into those drawn toward the hue high in visual sensitivity. CONSTITUTION:In hue corresponding circuit block 2, chrominance carriers in phase needed for I-axial and Q-axial color demodulation are supplied from phase shifters 17 and 18 to I-axial demodulator 19 and Q-axial demodulator 20, which provide I-axial demodulation and Q-axial demodulation to extract them. The output of demodulator 19 is supplied to clipping circuit 21, which extracts only a signal of positive polarity. The output of circuit 21 is supplied to multiplier 22 and then multiplied there by the demodulation output of demodulator 20 and the output of multiplication is supplied via terminal 16 to DC taint circuit 5 to vary the phase of the chrominance subcarrier of circuit 5 according to the phase of an input chrominance signal. As a result, a phase correction is made to obtain a phase closer to the I axis besides a chrominance signal at a position near the I axia with the highest visual sensitivity.
JP6223679A 1979-05-22 1979-05-22 Automatic hue correcting circuit Pending JPS55154891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6223679A JPS55154891A (en) 1979-05-22 1979-05-22 Automatic hue correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6223679A JPS55154891A (en) 1979-05-22 1979-05-22 Automatic hue correcting circuit

Publications (1)

Publication Number Publication Date
JPS55154891A true JPS55154891A (en) 1980-12-02

Family

ID=13194312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6223679A Pending JPS55154891A (en) 1979-05-22 1979-05-22 Automatic hue correcting circuit

Country Status (1)

Country Link
JP (1) JPS55154891A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051387A (en) * 1983-08-31 1985-03-22 Sony Corp Digital color decoder
JPS60132490A (en) * 1983-11-21 1985-07-15 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for correcting hue
JPS61210784A (en) * 1985-03-14 1986-09-18 Sanyo Electric Co Ltd Automatic hue correcting device
JPS61210782A (en) * 1985-03-14 1986-09-18 Sanyo Electric Co Ltd Automatic hue correcting device
JPS6236994A (en) * 1985-08-10 1987-02-17 Sanyo Electric Co Ltd Device for automatically correcting hue
JPS6242691A (en) * 1985-08-20 1987-02-24 Sanyo Electric Co Ltd Automatic hue correcting device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051387A (en) * 1983-08-31 1985-03-22 Sony Corp Digital color decoder
JPH0542200B2 (en) * 1983-08-31 1993-06-25 Sony Corp
JPS60132490A (en) * 1983-11-21 1985-07-15 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for correcting hue
JPS61210784A (en) * 1985-03-14 1986-09-18 Sanyo Electric Co Ltd Automatic hue correcting device
JPS61210782A (en) * 1985-03-14 1986-09-18 Sanyo Electric Co Ltd Automatic hue correcting device
JPS6236994A (en) * 1985-08-10 1987-02-17 Sanyo Electric Co Ltd Device for automatically correcting hue
JPH0435109B2 (en) * 1985-08-10 1992-06-10 Sanyo Electric Co
JPS6242691A (en) * 1985-08-20 1987-02-24 Sanyo Electric Co Ltd Automatic hue correcting device
JPH0435110B2 (en) * 1985-08-20 1992-06-10 Sanyo Electric Co

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