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:
Nov. 12, 1991
Filed:
Oct. 22, 1990
Alan Koebel, Kitchener, CA;
Electrohome Limited, Ontario, CA;
Abstract
In a digital convergence circuit within a video display system, an interpolation circuit for multiplying first and second predetermined correction values corresponding to a pair of sample points by a plurality of respective first and second weighting coefficient values corresponding to successive additional sample points (i) intermediate the first and second sample points. Circuitry is provided for detecting the number (N) of successive additional sample points (i) and in response generating a first address signal representative thereof. Further circuitry is provided for generating successive count address signals corresponding to the successive additional sample points (i). A memory is included for receiving the first and successive count address signals and in response generating respective ones of the first weighting coefficient values .alpha. in accordance with the relation .alpha.=i/N. Additional circuitry is provided for receiving and inverting the respective ones of the first weighting coefficient values .alpha. and in response generating respective ones of the second weighting coefficient values in accordance with the relation 1-.alpha.=1-i/N.