Drop out compensation system

Details Drop out compensation system Drop out compensation system

1974-09-05

1976-04-06

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

360 38, 360 36, 178 66DC, H04N 576, G11B 509

Patent

active

039494160

ABSTRACT:
The drop out compensation system comprising input means for accepting a colour or monochrome picture information signal, output means, a drop out compensating signal generator, switch means for effecting connection of said input means to said compensating signal generator and for effecting connection between said compensating signal generator and said output means, and a drop out detector for effecting switching of said switch means, said compensating signal generator including delay means for providing a delayed output signal of the information signal entering the delay means, adder means for summing the information arriving simultaneously at the delay means and said delayed output, means for reducing the level of the signal from the compensating signal generator so that the low frequency luminance level of said resulting compensating signal at said output means has a value the same as that in the colour picture information signal at the input means, and storage means for effecting a delay within the compensating signal generator equal to at least one scanning line time. The resulting compensating signal at said output means has the correct luminance and hue values, but with a reduced saturation value. The compensating signal on the occurrence of a drop out is fed into the picture line being scanned at the correct time and in the correct phase relationship.

REFERENCES:
patent: 3586762 (1971-06-01), Hodge et al.
patent: 3699246 (1972-10-01), Hodge
patent: 3716663 (1973-02-01), Bolger
patent: 3755621 (1973-08-01), Krause et al.
patent: 3824620 (1974-07-01), Langer

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