Video Overlay
Video card, Computer monitor, TV tuner card
978-620-0-52634-2
6200526346
72
2012-02-03
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Video overlay is any technique used to display a video window on a computer display while bypassing the chain of CPU -< graphics card -< computer monitor. This is done in order to speed up the video display, and it is commonly used, for example, by TV tuner cards and early 3D graphics accelerator cards. The term is also used to describe the annotation or inclusion of interactivity on online videos, such as overlay advertising. Various methods to achieve video overlay are in use: A video overlay device can be connected between the graphics card analog VGA output and the monitor's input forming a "VGA passthrough". The device modifies the VGA signal and inserts the analog video signal overlay into the picture; the rest of the screen is filled by the signal coming from the graphics card.
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Informatics, IT
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