Digital video effects apparatus

Details Digital video effects apparatus Digital video effects apparatus

1988-09-19

1989-10-10

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358183, H04N 5272, H04N 5275

Patent

active

048735680

ABSTRACT:
A digital video effects apparatus comprises an input for receiving a digital input video signal representing the distribution of optical information over a video field, and a key signal generator for providing a digital key signal that defines an area of the video field. A mask signal generator provides a digital mask signal that defines at least a portion of said area of the video field. The digital mask signal is combined with the digital key signal to provide a modified digital key signal, and the input video signal is acted on in accordance with the modified key signal to provide an output video signal.

REFERENCES:
patent: 4694343 (1987-09-01), Flora
patent: 4694344 (1987-09-01), Flora
patent: 4758892 (1988-07-01), Bloomfield
patent: 4805022 (1989-02-01), Abt
patent: 4823183 (1989-04-01), Jackson

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