Visual presentation system providing for a wiping change from on

Details Visual presentation system providing for a wiping change from on Visual presentation system providing for a wiping change from on

1991-04-05

1992-08-18

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5262

Patent

active

051404257

ABSTRACT:
One or more, preferably three, cathode ray tube displays are juxtaposed for simultaneous reproduction of correlated picture signals from video disk players or the like. Each disk player is connected to one of the displays via a serial connection of two frame memories each capable of storing the successive frames of a picture signal one at a time. A wipe control circuit is connected to the latter stage frame memories for causing a wiping change from old to new scenes to take place on the displays in any selected one of several different wipe modes. Upon commencement of a wiping scene change, the wipe control circuit first freezes the latter stage frame memories, thereby retaining the last frames of the old scenes thereon, and gradually replaces the last frames of the old scenes on the latter stage frame memories with the first frames of new scenes from the preceding stage frame memories. A wiping change from the old to the new scenes takes place on the displays as the latter stage frame memories are repeatedly read during the gradual repalcement of the last frames of the old scenes with the first frames of the new scenes.

REFERENCES:
patent: 4199790 (1980-04-01), Greenfield
patent: 4751579 (1988-06-01), Okunishi
patent: 4833538 (1989-05-01), Hieda
patent: 4943856 (1990-07-01), Bakhmutshi
patent: 5023720 (1991-06-01), Jardins

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