Progressive scan television system

Details Progressive scan television system Progressive scan television system

H - Electricity

04

N

350/36

H04N 11/20 (2006.01) H04N 5/44 (2006.01) H04N 7/01 (2006.01)

Patent

CA 1245341

ABSTRACT PROGRESSIVE SCAN TELEVISION SYSTEM A color television signal representing an image scanned in interlaced format is displayed by a display means (51) in progressive scan format. The progressively scanned image comprises "real" lines and further lines preferably interpolated by an interpolator (5,7,9) from the real lines. Vertical detail luminance information is derived from the television signal and combined (27,39) with the lines of luminance information. In one embodiment, the vertical detail information is combined (27) with a first gain and one polarity (35) with the real lines, and combined (39) with a second gain and opposite polarity (41) with the interpolated lines. A time compressor (23) then time compresses the lines for progressive scanning. (Fig. 1). In another embodiment, the real and interpolated lines are time compressed in one compressor (23), the vertical detail is time compressed in another (303) and then combined (307) with the compressed lines. (Fig. 3).

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