Method for reducing the scan line visibility for projection tele

Details Method for reducing the scan line visibility for projection tele Method for reducing the scan line visibility for projection tele

1984-12-07

1986-12-30

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 60, H04N 931

Patent

active

046332944

ABSTRACT:
A method for reducing the scanning line visiblity in the display of a color projection television receiver in which the rasters of scanning lines for the separate color signals are deconverged by vertically shifting the scanning line raster of each color signal with respect to the other color signal. Each projected line of the respective color signals is then derived by a weighted interpolation between two succeeding lines in the incoming television signal, in which the contribution of a first incoming line with respect to a second incoming line is dependent on the amount by which the respective line in the raster of the relevant color signal is vertically shifted. The amounts of vertical shifting of the respective rasters is cyclically rotated between the respective rasters once every picture frame.

REFERENCES:
patent: 4400719 (1983-08-01), Powers
patent: 4456923 (1984-06-01), Annegarn et al.
patent: 4482919 (1984-11-01), Alston et al.
patent: 4524379 (1985-06-01), Okada et al.

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