Interlace to non-interlace scan converter for RGB format video i

Details Interlace to non-interlace scan converter for RGB format video i Interlace to non-interlace scan converter for RGB format video i

1985-04-30

1987-01-27

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, 358 37, H04N 977

Patent

active

046397639

ABSTRACT:
A speed-up memory converts interlaced RGB input signals to double line-rate (progressive scan) form. A vertical detail signal is derived from the RGB input signals before or after speed-up and a vertical peaking signal is derived from the detail signal. During the first read operation of the speed-up memory both signals are added to the speeded-up signals to effect a preshoot of the resultant signal and during the second speed-up memory read operation only the peaking signal added to affect an overshoot of the resultant signals whereby alternate lines of the converted RGB signals exhibit enhanced vertical detail.

REFERENCES:
patent: 3732360 (1973-05-01), Breimer et al.
patent: 4245237 (1981-01-01), Lagoni
patent: 4400719 (1983-08-01), Powers
patent: 4415931 (1983-11-01), Dischert
patent: 4422094 (1983-12-01), Lewis, Jr. et al.
patent: 4558347 (1985-12-01), Pritchard et al.
patent: 4573068 (1986-02-01), Dorsey et al.

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