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. 18, 2000
Filed:
Feb. 28, 1997
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A digital color encoder capable of reducing the aperture distortion of D/A conversion and the waveform distortion of the video signal without resulting in the increase of the consumed electric current. At first, digital signals sampled with a sampling frequency are inputted as original color signals. The digital composite color video signals of the sampling frequency fl are created from those signals by digital signal processing with the combination of matrix circuit, color burst controlling circuit, modulation circuit, addition circuit, and synchronization signal adding circuit, etc. Next, the sampling frequency of the composite color video signal is converted by a sampling frequency converting circuit inserted immediately before the D/A converter. The converted signal is further converted to an analog signal capable of being inputted into the TV set by a D/A converter, and the signal is outputted as a video signal.