Surveillance ? Multiplexers
Multiplexing - the most effective way to continuously record images from multiple sources in one media.
Multiplex record - a record full-frame sequence (frame by frame) from each of the connected cameras.
Multiplex recording provided using a digital processor image processing with frame memory buffer, which records images from cameras. Processor memory serves in this case the time base corrector (ie, proofreader asynchronous cells).
Generally speaking, before the multiplexers that purpose served freymsvitchery - switches the video signal, in which switching is carried out at the time of the Personnel sync. This is true, requires that all cameras were synchronous and in phase with each other.
The process of forming the output signal for recording is called coding. At the same time in the invisible line staff written form service information (ID camera date, time, alarm and tags etc.). Reverse the process when you play called decoding. The main disadvantage of sequential multiplex recording is increase in the period of renovation images from each of the recordable Chambers (multiplier effect). When installing the recorder in mode of long-term recording this effect can lead to loss valuable information. For partial this shortcoming almost all models multiplexers used method of dynamic allocation recording time, based on is the analysis of changes in the image. Algorithms for change detection may be different from the simplest brightness to the complex, with an analysis image in the phase space. If you notice changes in image from the camera, the frequency recording images from this camera increases, which reduces likelihood of missing important events. The latest models of multiplexers detector output activity in the processing of each channel are displayed on the external connector and can be used for other applications.
1. 
MV 96E - China Color multiplexer ROBOT, 16 channels, transit outputs, digital motion detector, Zoom, Alarm, PIP, RS232 (PSU included)
Price:
$ 300.00 
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