The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1992
Filed:
Sep. 08, 1988
Yasutoshi Matsuo, Kawasaki, JP;
Hiroshi Yamada, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A luminance signal/color signal separation circuit comprises a bandpass filter which separates a first color signal partially including a luminance signal component from a composite image signal, a delay circuit which delays the first color signal to obtain a second color signal, a logic circuit which outputs a luminance component signal from the first color signal and the second color signal, a first adder/subtracter which extracts a third color signal free from the luminance signal component by combining the luminance component signal and the first color signal, and a second adder/subtracter which extracts luminance signal by combining the third color signal and the composite image signal. Another luminance signal/color signal separation circuit comprises a wide range bandpass filter which separates a first color signal from a composite image signal, a delay circuit which delays the first color signal to obtain a second color signal, a logic circuit which outputs color signal with a wide range or with a reduced level is response to the degree of vertical correlation of pictures, and an adder/subtracter which outputs a luminance signal. Color signal with a narrow range can be outputted in place of the signal with the reduced level.