H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/89
H04N 3/36 (2006.01) H04N 5/14 (2006.01) H04N 9/11 (2006.01) H04N 5/00 (2006.01)
Patent
CA 1220852
PHN. 10.596 10 ABSTRACT: A television circuit arrangement for determining in a video signal (VS) frame periods comprising two field periods when a picture signal repeated in cycles of two successive field periods and with a possible change of picture content therebetween is present. Signal sources, such as, for example, cine-film television converters and "field skip" signal storage- and display devices, supply such a signal. It may be required for signal processing operations improving the picture quality during display to use the cycles as frame periods. For this purpose, the circuit arrangement is provided with a switching circuit (S1-S6), a first (C1, S1, S4) and a second signal integra- tion circuit (C2, S2, S5) which can be reset and are alter- nately operative every other field period and a succeeding signal comparison circuit (AMP,S6) for supplying a voltage (VF) determining the frame period.
447567
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
LandOfFree
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