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:
Jul. 20, 2004
Filed:
Jun. 08, 2001
Applicant:
Inventor:
Masao Okada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/455 ; H04N 5/46 ; H04N 9/66 ;
U.S. Cl.
CPC ...
H04N 5/455 ; H04N 5/46 ; H04N 9/66 ;
Abstract
A color system discriminator is provided with a frequency detector, a vertical-synchronizing frequency detector, a plurality of color demodulators, a demodulating switch, and a controller. The type of the color system of a received signal is determined with reference not only to the burst lock frequency indicated in the tuner detection signal and the phase of the R-Y color difference signal of the image signal, but also to the frequency of the sound carrier signal and the vertical synchronizing frequency.