Synchronization interface device for autonomus video equipment

Details Synchronization interface device for autonomus video equipment Synchronization interface device for autonomus video equipment

1982-04-05

1984-05-22

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 504

Patent

active

044504802

ABSTRACT:
A synchronization interface device to be used in conjunction with equipment with its own internally generated synchronization signal to allow harmonization with other external video signals from other devices to facilitate the manipulation of these signals, including means for separating the odd field from the internal and external signals and gate means producing a unique output state when both signals are in synchronization and a different output inhibiting the passage of the internally generated horizontal drive to means for comparing it against the external horizontal component so that the output from this comparison is fed to voltage oscillator means which produces an output in the 14 MHz range that is fed back to the slave equipment (AVE). If the gate means do not produce the unique output, the device experiences a drift until it locks in synchronization.

REFERENCES:
patent: 4306250 (1981-12-01), Summers et al.
patent: 4346407 (1982-08-01), Baer et al.

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