Television scan line doubler including temporal median filter

Details Television scan line doubler including temporal median filter Television scan line doubler including temporal median filter

1990-02-05

1990-10-30

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358140, H04N 718

Patent

active

049672711

ABSTRACT:
A television line doubler having a video pixel interpolator and a multi-component motion detector including at least one frame-recursive component for detecting a motion value in the area of the pixel to be interpolated. A second switch switches its output to an interpolated pixel time compression circuit in accordance with the detected motion value. The second switch and the motion detector provide a proportional switch with an onset at approximately 2 to 5 IRE units of motion value and operating in accordance with the absolute amplitude of the motion value. Full switchover to the intra-field interpolator means occurring at approximately 5 to 15 IRE units of motion value amplitude. The motion detector stretches the detected motion to a predetermined number of adjacent pixel location in the line domain and a recirculation loop enables a component of motion to be recirculated.

REFERENCES:
patent: 4775888 (1988-10-01), Nakagawa et al.
patent: 4811092 (1989-03-01), Achiha et al.

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