Digital effects loop for video switchers

Details Digital effects loop for video switchers Digital effects loop for video switchers

1986-03-28

1987-09-15

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5265

Patent

active

046943447

ABSTRACT:
A digital effects loop is inserted in the video and key signal buses which extend to a mixer of a switcher apparatus, and a digital effects unit is coupled to the loop. Circuitry is included in the loop to interrupt the particular bus or buses and the signal or signals are re-routed to provide inputs to the digital effects unit. The latter supplies transformed video and/or key signals back to the continuation of the respective interrupted bus or buses, and then to the mixer to be used thereby in place of the original signals.

REFERENCES:
patent: 4392156 (1983-07-01), Duca
patent: 4463372 (1984-07-01), Bennett
patent: 4472732 (1984-09-01), Bennett
Theory and Operation, Ampex Corporation Service Manual No. 1809633, Sep. 1984, pp. 3.1-3.10, 3.25-3.40 and 3.47-3.50.

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