Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1984-11-27
1986-11-25
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, H04N 701
Patent
active
046252398
ABSTRACT:
A picture flicker correction is desired with video disc players involving display of a stop-motion or still television picture and with television displays using field and line frequency doubling, in accordance with the so-called ABAB method. With a movement detector (51) movement or the absence of movement is detected. Two adding circuits (19, 22) are connected in parallel to delay devices (9, 9+12) having time delays substantially equal to a field period. By means of two switch-over devices (32, 37) switched by the movement detector (51), the delay devices (9, 9+12) or the adding circuits (19, 22) can be coupled with a switch-over device (45) which is switched once per field period. A further delay device (42) having a time delay substantially equal to a field period provides for information transfer during second field periods of frame periods comprising two field periods. In the absence of movement detection, the original information is transferred, and in the event of movement detection, the combined information is transferred.
REFERENCES:
patent: 4090218 (1978-05-01), Van Buul et al.
patent: 4296434 (1981-10-01), Drewery et al.
patent: 4485401 (1984-11-01), Tan et al.
Tan Sing L.
Van De Polder Leendert J.
Vreeswijk Franciscus W. P.
Briody Thomas A.
Britton Howard W.
Goodman Edward W.
Kostak Victor R.
Streeter William J.
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