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Equipment for the systems of video surveillance in Kiev
> ⇒Multiplexers

Мультиплексоры

Multiplexing is the most effective way of capturing images from multiple sources into one medium.
Multiplex recording is a recording full frames sequentially (frame by frame) from each of the connected cameras.
Multiplex recording areapplication of digital processorimage processing with buffer memory into which personnel records the image from video cameras. Processor with memory serves this case corrector time basis (i.e. proofreader desynchronizations cameras).

Generally speaking, before the advent of thethe multiplexers have servedfrejmsvitčery – switches the video signal in which the switch is done in the time frame sync pulse. While true requires that all video cameras were in sync and sinfazny each other.

The formation of the outputsignal for recording calledencoding. The invisiblestring Blanca is written on staffservice information (ID cameradate, time, alarm and labelsetc.). Reverse the process when you playis called decoding.The main disadvantage of serialMultiplex recording isincrease refresh periodimages from each of the recordableChambers (multiplier effect).When installing a tape recorder in theThis long-time recording modethe effect can result in loss ofvaluable information. For partialfill this gap,virtually all modelsmultiplexers usedmethod for dynamic allocationrecording time basedis the analysis of changes in the image.Change detection algorithmsvary from the simplestLuma to complex, with analysisimage in phase space.When changes are detected inimage from the camera,recording an image from this cameraincreases, which reduceslikely to miss important events. In the latest models of the multiplexer output activity detectors in each channel processing are displayed on the external connector and can be used for other applications.




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