Television – Format conversion – Line doublers type
Patent
1993-04-09
1994-07-12
Groody, James J.
Television
Format conversion
Line doublers type
348443, H04N 701
Patent
active
053293142
ABSTRACT:
A video input signal is vertically interpolated and applied along with a field delayed and a field advanced video signal to respective inputs of a first median filter the output of which is applied along with a line delayed and a line advanced signal to respective inputs of a second median filter to provide an interpolated video output signal. The resultant double median filtered signal and a field delayed signal are applied via respective time compressors to a multiplex switch to provide an output signal of progressive scan form and in which every other line thereof is interpolated by double median filtering.
REFERENCES:
patent: 4896212 (1990-01-01), Chantelou
patent: 4989090 (1991-01-01), Campbell et al.
patent: 5001563 (1991-03-01), Doyle et al.
patent: 5081532 (1992-01-01), Rabii
patent: 5168358 (1992-12-01), Ishizu et al.
Achiha, M: Bewegungsadaptiver Qualitatsdecoder und Up-Konverter fur PAL-Signale; pub. Fernseh- und Kino-Technik; 1992; pp. 98-104.
Hentschel: "Comparison Between Median Filtering and Vertical Edge Controlled Interpolation for Flicker Reduction"; IEEE Transactions on Consumer Electronics, vol. 35; Aug. 1989; pp. 279-289.
Also enclosed herewith, for the examiner's information, is a copy of a search report prepared by the German patent office.
Correa Carlos
Stolte John
Burgess Glenton B.
Coalter Richard G.
Deutsche Thomson-Brandt GmbH
Emanuel Peter M.
Groody James J.
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