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:
Apr. 10, 1990
Filed:
Jun. 03, 1988
Yasutoshi Matsuo, Kawasaki, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A luminance signal/color signal separation circuit comprises a color signal separation circuit for obtaining a first color signal partially including luminance signal component from a composite image signal, a computation circuit for obtaining a second color signal including a color separation error signal by eliminating the luminance signal component from the first color signal to take out a signal of the second highest potential of the first and second color signals and a reference potential, thus to take out a third color signal excluding the color separation error signal, and a luminance signal separation circuit for obtaining a luminance signal from the composite signal and the third color signal. This circuit is constituted to first consider a signal which seems to be a C signal as a C signal once at least to effect computation between that signal and current line data, whereby when the result thereof indicates that considering that signal as C signal is correct, that signal is used as C signal, while when erroneous, that signal is not used as C signal. Thus, drawbacks, e.g., dot crawl of Y signal and/or half tone or color shift of C signal do not occur.