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. 16, 1996
Filed:
Mar. 30, 1995
Takahisa Hatano, Sapporo, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A luminance and chrominance signal separating apparatus includes a first delay device for delaying an input chrominance color television signal by one horizontal period and a second delay device for delaying a reference signal one horizontal period. An output of the first delay device is regarded as a reference signal. Two correlation detectors detect correlations between the reference signal and the signals separated from the reference signal by one horizontal period. A black level detector detects a black level of the reference signal. Filters separate a chrominance signal from the reference signal. A selector selects one of the outputs of the filters based on the output of the correlation detectors and the output of the black level detector. A bandpass filter limits a bandwidth of the selector output and outputting a chrominance signal. A subtracter subtracts the chrominance signal obtained from the bandpass filter from the reference signal and outputs a luminance signal.