Tektronix, Inc.

The Grass Valley Group, Inc.

R Barry Angell

Daniel J Chaplin

Christopher R Hansen

Paul M Trethewey

A wipe solid generator has a first memory with one memory location for each pixel during the active interval of a line of a video signal and a second memory with one memory location for each active line during a field of a video signal. A processor calculates numerical values, loads numerical values into the first and second memories, and reads numerical values from the first and second memories synchronously with a video signal. An arithmetic section carries out a combinational arithmetic operation on numerical values read from the memories and provides an output wipe solid signal dependent on the result of the operation.

Method and apparatus for generating a wipe solid

A method for accumulating component video signals non-additively adds the luminance components to produce an accumulated luminance component, and additively adds the chrominance components to produce an accumulated chrominance component. The accumulated chrominance component may be clipped to limit chrominance values in an overlap area to legal color values. The intentional overlap of the component video signals produces an accumulation special effect in the overlap area.

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Nevada City, CA, United States of America

R Barry Angell