04941045 is referenced by 58 patents and cites 27 patents.

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.

Title
Method and apparatus for improving vertical definition of a television signal by scan conversion
Application Number
7/255328
Publication Number
4941045
Application Date
October 11, 1988
Publication Date
July 10, 1990
Inventor
Christopher H Birch
Toronto
CA
Agent
Banner Birch McKie & Beckett
Assignee
Scientific Atlanta
GA, US
IPC
H04N 7/18
H04N 7/12
H04N 7/01
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