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. 10, 1990
Filed:
Oct. 11, 1988
Christopher H Birch, Toronto, CA;
Scientific-Atlanta, Inc., Atlanta, GA (US);
Abstract
Scan conversion apparatus for improving the vertical resolution of a television image for display comprises a field store for storing the previously transmitted field and a line store for storing video data representative of the previous line including the most recent picture element. In an interlaced system, the two vertically adjacent picture elements and the intermediate picture element transmitted in the previous field are used to provide five selectable values. The video data is also tested in accordance with three tests comprising a rank ordering test, a vertically sharp transition test and a motion test. According to the results of these tests, one of the five alternative values is chosen as an interpolated value for display with the vertically adjacent values for the currently transmitted field. The selection process may be assisted by the provision of an auxiliary signal indicative of the probability of motion of a predetermined block of data.