Recognizing transmission errors in video security system with real-time image transmission of security camera; changes video signal with AC frequency perceptible by human eye soft visually recognizable object changing on display

摘要

The invention relates to a method for identifying transmission errors in a video monitoring system with real-time image transmission. The method is particularly used in applications involving security technology. The video monitoring system consists of a camera unit, of a signal processing unit, of a display unit and of a transmission link, whereby the visual area monitored by the camera unit is reproduced on the display unit. In the camera unit, a varying visual signal with an alternating frequency that can be interpreted by the human eye is introduced into the video signal recorded by the camera unit. This signal is depicted on the display unit as a visually identifiable object that varies with the same alternating frequency. This enables a user to identify if the currently represented signal corresponds to the video signal recorded by the camera unit.