Video system for combining multiple video signals on a single display
AssigneeHuaya Microelectronics, Ltd.
InventorsShing-Jong Shy, Biao Zhang
Life of this patent
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Abstract
A video system and method for combining multiple video signals on a single display is provided. The video system includes a video processor to process a second video signal and generate a processed video signal. The processed video signal has the same resolution and scan rates as a first video signal. A multiplexer is used to selectively display either the processed video signal or the first video signal on a display.
Claims26
A video system for combining a first analog video signal with a second analog video system to generate a combined analog video signal, the video system comprising:
- a multiplexer having a first input port, a second input port, a control port, and an output port, wherein the first input port is coupled to receive the first analog video signal and the output port is configured to provide the combined analog video signal;
- a video processor coupled to receive the second analog video signal and to generate a processed analog video signal and a switch signal,
- wherein the video processor is configured
- to change the resolution of a plurality of images from the second analog video signal to form a plurality of scaled images;
- to pad the plurality of scaled images with pad data to form a plurality of padded images having a resolution equal to a resolution of a plurality of images in the first analog video signal;
- and
- to form the processed analog video signal with the plurality of padded images;
- and
- wherein the switch signal is provided to the control port of the multiplexer and the processed analog video signal is provided to the second input port of the multiplexer.
A method of combining a first analog video signal and a second analog video signal to form a combined video signal, the method comprising:
- processing the second analog video signal to form a processed video signal by
- scaling a plurality of images in the second analog video signal to form a plurality of scaled images;
- padding the plurality of images with pad data to form a plurality of padded images, wherein the plurality of padded images have a same resolution as a plurality of images in the first analog video signal;
- and
- forming the processed video signal using the plurality of padded images;
- generating a switch signal;
- driving the processed video signal as the combined video signal when the switch signal is in a first state;
- and
- driving the first analog video signal as the combined video signal when the switch signal is in a second state.
Dependencies are inferred from the claim text.