Video signal selection means for transmitting signal and key inf

Details Video signal selection means for transmitting signal and key inf Video signal selection means for transmitting signal and key inf

1990-03-05

1991-07-09

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, 358183, H04N 5262, H04N 5265, H04N 5272

Patent

active

050310437

ABSTRACT:
A video signal is processed in response to a key signal by selecting the video signal when the value of the key signal is within a first range and selecting a second signal when the value of the key signal is within a second range that excludes the first range. The amplitude of the second signal is outside the range of a video signal throughout the active picture interval.

REFERENCES:
patent: 4392156 (1983-07-01), Duca
patent: 4689681 (1987-08-01), Jackson
patent: 4827251 (1989-05-01), Aoki
patent: 4887159 (1989-12-01), Chaplin
patent: 4963977 (1990-10-01), Jackson et al.

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