Digital camera frame capture circuit

Details Digital camera frame capture circuit Digital camera frame capture circuit

1986-11-28

1988-04-05

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358244, 346110R, H04N 514

Patent

active

047362502

ABSTRACT:
A frame capture circuit for use with a video camera includes an analog-to-digital converter for converting composite video to digital form and a memory for storing sequential frames of digital video. The analog-to-digital converter is connected to the memory through a summer, and the memory has an output connected to a second summer input through a feedback loop. The feedback loop includes a switch controlled by a central processing unit such that when the switch is closed, the output of the memory is a composite video data frame comprising a current plus a previous frame of data. The central processing unit closes the switch whenever an event of interest displayed on an external device falls near the end of a frame of video generated by the camera so that the entire event is captured without regard to the scanning phase of the video camera.

REFERENCES:
patent: 4530011 (1985-07-01), Haddick
patent: 4593316 (1986-06-01), Kellar et al.
patent: 4639784 (1987-01-01), Fling
patent: 4647976 (1987-03-01), Nakagaki et al.

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