Television circuit for the reduction of flicker on a display

Details Television circuit for the reduction of flicker on a display Television circuit for the reduction of flicker on a display

1984-05-31

1986-08-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358214, H04N 701

Patent

active

046072829

ABSTRACT:
The television circuit is suitable for use with a television picture signal originating from a tele-cine converter (1) which operates at a cine film display rate of 24 frames per second and a 60 Hz field frequency. The picture signal has cycles of alternately two and three field periods with the same picture information which, on display, results in flicker phenomena. To reduce flicker on display of the picture signal on a display screen, the picture signal is applied directly and by a delay device (5) producing a time delay of at least two or more whole field periods to a signal combining circuit (6) which is in the form of a matrix circuit and is followed by a change-over circuit (7). The matrix circuit (6) produces signal combinations in the output picture signal which on display result in flicker reduction.

REFERENCES:
patent: 3882539 (1975-05-01), Faroudja
patent: 3886589 (1978-05-01), Nasu

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