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. 18, 1989
Filed:
Apr. 20, 1988
John P Rossi, Stamford, CT (US);
Other;
Abstract
In the generation of NTSC color television signals, the luminance signal and the color difference signals are pre-filtered along the vertical picture axis. Full bandwidth luminance is pre-filtered by combining, with appropriate coefficients, signals from three adjacent television lines, and, additionally, a vertical detail signal is generated by combining the same three adjacent television lines, with difference coefficients, and low pass filtering the resultant signal. A desired adjustable level of the vertical detail signal is added back into the pre-filtered full bandwidth luminance signal to partially or fully cancel the effect at the lower frequencies of pre-filtering the luminance signal. Time multiplexed color difference signals at baseband are prefiltered by combining with appropriate coefficients, the signals from three adjacent television lines. The prefiltering operation is translated to the conventional NTSC chrominance band by the color modulation process. The processed chrominance signal is added to the processed luminance signal to obtain an NTSC color television signal.