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:
May. 02, 1989
Filed:
Oct. 02, 1987
Saiprasad V Naimpally, Knoxville, TN (US);
North American Philips Consumer Elec. Corp., New York, NY (US);
Abstract
In the PIP circuit of a television receiver, the resolution of the analog-to-digital converter is improved by one bit. This is done by adding a dither signal, having an amplitude equal to one-half the least significant bit at the converter output to the analog input signal throughout specific lines of the input signal. If the converter output signal is filtered by a piecewise recursive filter, in which every third line is a valid line, the other two being discarded in the subsequent PIP processor, then the dither signal is applied during the valid line and the line two lines removed from the valid line, i.e. the line following the previous valid line. If the filter is a FIR filter then the dither signal is applied during alternate lines.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile