JPS5742283A - Chromachy signal generator - Google Patents

Chromachy signal generator

Info

Publication number
JPS5742283A
JPS5742283A JP11753580A JP11753580A JPS5742283A JP S5742283 A JPS5742283 A JP S5742283A JP 11753580 A JP11753580 A JP 11753580A JP 11753580 A JP11753580 A JP 11753580A JP S5742283 A JPS5742283 A JP S5742283A
Authority
JP
Japan
Prior art keywords
signal
component
color
subtractors
multipliers
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
JP11753580A
Other languages
Japanese (ja)
Other versions
JPS636199B2 (en
Inventor
Toshiro Watanabe
Akira Suzuki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11753580A priority Critical patent/JPS5742283A/en
Publication of JPS5742283A publication Critical patent/JPS5742283A/en
Publication of JPS636199B2 publication Critical patent/JPS636199B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To set the reference color for an arbitrary color with lower chroma, by acquiring a component difference signal between a given signal component in Y, I and Q components extracted with Y, I, Q separation means of a color video signal and a reference color and forming a keying signal from this component signal. CONSTITUTION:A color video signal from an input terminal 1 is separated into Y, I and Q component signals at a Y, I, Q separation comb filter 2. Each component signal thus separated is applied to subtractors (adders) 3, 4, 5 as minuends, and reference Y signal component Y0, reference I signal component I0,, and reference Q signal component Q0 are respectively added to the subtractors 3, 4, 5 and the difference between an input color picture and the reference color is obtained at the subtractors 3, 4, 5 respectively and they are inputted to multipliers 6, 7, 8. At the multipliers 6, 7, 8, multiplication by a Y sensing signal (l), I sensing signal (m), and Q sensing signal (n) is made, each output is added at an adder 9, and a keying signal is outputted through signal processing at a clip circuit 10.
JP11753580A 1980-08-26 1980-08-26 Chromachy signal generator Granted JPS5742283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11753580A JPS5742283A (en) 1980-08-26 1980-08-26 Chromachy signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11753580A JPS5742283A (en) 1980-08-26 1980-08-26 Chromachy signal generator

Publications (2)

Publication Number Publication Date
JPS5742283A true JPS5742283A (en) 1982-03-09
JPS636199B2 JPS636199B2 (en) 1988-02-08

Family

ID=14714192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11753580A Granted JPS5742283A (en) 1980-08-26 1980-08-26 Chromachy signal generator

Country Status (1)

Country Link
JP (1) JPS5742283A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972285A (en) * 1982-10-18 1984-04-24 Nec Corp Chromakey signal generator
JPS59140784A (en) * 1983-01-31 1984-08-13 Sony Corp Chroma-key device
JPS6297526U (en) * 1985-12-10 1987-06-22

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6226048B1 (en) * 1996-09-12 2001-05-01 Sony Corporation Image signal processing apparatus having a signal level corrector circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972285A (en) * 1982-10-18 1984-04-24 Nec Corp Chromakey signal generator
US4630101A (en) * 1982-10-18 1986-12-16 Nec Corporation Chromakey signal producing apparatus
JPH0212435B2 (en) * 1982-10-18 1990-03-20 Nippon Electric Co
JPS59140784A (en) * 1983-01-31 1984-08-13 Sony Corp Chroma-key device
JPH0527312B2 (en) * 1983-01-31 1993-04-20 Sony Corp
JPS6297526U (en) * 1985-12-10 1987-06-22
JPH0444022Y2 (en) * 1985-12-10 1992-10-16

Also Published As

Publication number Publication date
JPS636199B2 (en) 1988-02-08

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