The Grass Valley Group, Inc.

Randy K Hall

Grant T McFetridge

A wipe-only effects apparatus has a video mixer with video input terminals for receiving respective input video signals. The mixer combines the input video signals in dependence upon a control signal received at a control input terminal of the mixer. A ramp generator a repetitive ramp signal and applies it to a control input terminal of the video mixer as the control signal. The repetitive ramp signals start at the beginning of the active picture interval of a video field and terminate at a position determined by an operator controlled knob. The transition from one video signal to the other is caused by decreasing the slope of the repetitive ramp signal to zero.

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Penn Valley, CA, United States of America

Randy K Hall