Apparatus for providing a video montage to a television picture

Details Apparatus for providing a video montage to a television picture Apparatus for providing a video montage to a television picture

1977-03-03

1978-09-26

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 522

Patent

active

041175123

ABSTRACT:
An apparatus for providing a video montage to a television picture image comprises first and second signal generators adapted to generate first and second signals in synchronism with the television horizontal and vertical scanning signals, respectively, first and second signal combining circuits adapted to set those portions of the first and second signals corresponding to a horizontal blanking period at a reference level, a mixer for mixing outputs of the first and second signal combining circuits, a clamping circuit for clamping the reference level portion of the output of the mixer at a predetermined clamp level, a slicer for slicing an output of the clamp circuit at a predetermined level width with the predetermined clamp level substantially at a midlevel to obtain a control signal so as to synthesize two channel video signals.

REFERENCES:
patent: 2784246 (1957-03-01), Hurford
patent: 3006993 (1961-10-01), Barndt

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