Still/moving picture selection control circuit for video phone s

Details Still/moving picture selection control circuit for video phone s Still/moving picture selection control circuit for video phone s

1990-07-30

1991-11-05

Kostak, Victor R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

379 53, H04N 714

Patent

active

050634402

ABSTRACT:
A still/moving picture selection control circuit for selecting a still picture or a moving picture in a video phone system by the operation of a switch. The circuit including a still selection unit for outputting pulse signals, a single-frame signal generating unit for generating single-frame signal, a movie signal generating unit for generating or stopping movie control signals, a still/movie control unit for applying a subcarrier frequency signal to an A/D converter when single-frame signal is output from the single-frame signal generating unit or when movie control signal is output from the movie signal generating unit, a memory section for storing the output signals of the A/D converter to a RAM when the single-frame signal is output and for applying the signals stored in the RAM to a D/A converter when the single-frame signal is not output.

REFERENCES:
patent: 4009330 (1977-02-01), Cutler et al.
patent: 4888795 (1989-12-01), Ando et al.
patent: 4924311 (1990-05-01), Ohki et al.

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