Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-07-18
1986-08-26
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 545
Patent
active
046086030
ABSTRACT:
Television camera apparatus for generating auxiliary signals such as a VITC signal, an alphanumeric character generating signal, and a window signal for use in gating video related signals to camera adjustment circuitry. The apparatus includes a memory for storing data words representative of auxiliary signals to be generated, a microprocessor for accessing the data words from the memory, and a parallel-in/serial-out (PISO) shift register for receiving the accessed data words in parallel and for shifting them out bit serial so as to thereby generate the auxiliary signal. A first-in/first-out (FIFO) register interfaces the PISO shift register to the microprocessor and memory. The microprocessor uses an internal "refresh" register, normally used to refresh dynamic memories, to access data words for loading into the FIFO. The same circuitry is used for generating plural auxiliary signals.
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R. V. Capozzi, Video Mixer-IBM Technical Disclosure Bulletin, Apr. 1973, vol. 15, No. 11, p. 3558.
National Semiconductor NSC 800, Microprocessor Data Sheet.
Chin Tommy P.
Harris Corporation
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