Video switch for analog and digital video signals
AssigneeAdder Technology Limited
InventorsNigel Anthony Dickens, Adrian Christopher Dickens, William Haylock
Life of this patent
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Abstract
There is provided video switching circuitry for use in a KVM switch and similar devices. Video signal switching circuitry can supply video signals from a one of a plurality of video sources connected to the circuit to a display device connected to the circuit. The high data signalling rate signals are converted into a greater number of lower data signalling rate signals for switching by a bus architecture. Also provided are video display systems in which analogue and digital video signals are switched synchronously to allow them to be displayed on common or separate display devices. Also described is a high-resolution monitor digital video data switching device.
Claims9
Video signal switching apparatus for supplying video signals from a one of a plurality of video sources to a display device, the apparatus including:
- a digital video signal switching circuit including a plurality of source digital video interface each connectable to a one of the plurality of video sources, a display digital video interface connectable to the display and a digital video data switch selectively providing a video signal path between the display interface and a one of the source interfaces;
- an analogue video switching circuit including a plurality of source analogue video interfaces each connectable to a one of the plurality of video sources, a monitor analogue video interface connectable to the display and an analogue video data switch selectively providing a video signal path between the monitor interface and a one of the source interfaces;
- wherein the analogue and digital video interfaces are associated in pairs;
- an analogue video source connected to a source analogue video interface of a first pair;
- a digital video source connected to a source digital video interface of a second pair not the same as the first pair;
- and
- a display connected to both the monitor analogue and digital interfaces such that the display will display an image for only a one of the video sources at a time;
- and
- control circuitry which provides a selection signal causing the analogue and digital video switching circuits to switch in synchrony.
Dependencies are inferred from the claim text.