Video camera apparatus having an optical zoom means and an elect

Details Video camera apparatus having an optical zoom means and an elect Video camera apparatus having an optical zoom means and an elect

1994-01-19

1995-05-30

Razavi, Michael T.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348358, H04N 5232

Patent

active

054206324

ABSTRACT:
A video camera apparatus has an optical zoom and an electronic zoom which are both smoothly operated in a ganged relation while a zoom speed is maintained. The optical zoom means and electronic zoom means are respectively controlled by microcomputers. In that case, zoom information, such as a zoom magnification, is supplied to the two microcomputers via a serial communication, or a zoom magnification of the optical zoom means is constantly supplied to the microcomputer. When the optical zoom means reaches a wide angle lens end or telephoto lens end, a zoom speed thereof is not stopped rapidly but the zoom speed thereof is progressively decreased just before the optical zoom means reaches the wide angle lens end or telephoto lens end under the control of the microcomputer. When a zooming operation is started, the electronic zoom means do not immediately reach target zoom speeds but progressively increase their zoom speeds to reach the target zoom speeds.

REFERENCES:
patent: 4843475 (1989-06-01), Imai

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