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. 19, 1991
Filed:
Feb. 15, 1989
Yasutoshi Matsuo, Kawasaki, JP;
Hiroshi Yamada, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A luminance signal/color signal separation circuit includes a band-pass filter for picking up a color signal from a composite image signal; a delay circuit for sequentially delaying by one line the color signal picked up by the band-pass filter and obtaining three past, present and future line information; a first operation circuit for outputting a signal which takes a value having a larger absolute value when the past and future line information have the same sign, and takes an algebraic sum of the past and future line information when the past and future line information have different signs; a second operation circuit for outputting a signal which takes a value having a smaller absolute value when the output from the first operation circuit and the present line information have the same sign, and takes a reference value when the output from the first operation circuit and the present line information have different signs; and a third operation circuit for obtaining a color signal by subtracting the output from the second operation circuit from the present line information.