KR970060926A - Visitor monitoring system for absenteeism - Google Patents

Abstract

The present invention relates to a visitor surveillance system for absenteeism. The present invention provides a video camera for photographing a visitor, a switch unit for selectively outputting a camera video signal and a television video signal, and a controller for turning on the power in the visitor monitoring system when a visitor is detected through an external sensor A video RAM for storing a camera video signal when a resident is absent under the control of the control unit and for outputting a stored video signal when there is a visitor confirmation request from a resident after the absence of the resident, In a form that can be stored in a video RAM, and signal processing means for processing the video signal read out from the video RAM into a displayable form. Therefore, it is possible to confirm the next visitor even when the resident is absent, thereby providing an effect of increasing the efficiency of the visitor surveillance system.

Description

Visitor monitoring system for absenteeism

Since this is a trivial issue, I did not include the contents of the text.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a visitor surveillance system for absenteeism according to a preferred embodiment of the present invention; FIG.

Claims (6)

A surveillance system for monitoring and confirming a visitor when a resident is absent, the surveillance system comprising: a video camera for photographing a visitor; a sensor for detecting a visitor; A first signal processing means for receiving a visitor image signal photographed by the video camera and processing the received visitor image signal in a form that can be stored in the memory means; 1 memory means for storing the visitor image signal processed by the signal processing means and for reading the stored visitor image signal under the control of the control unit according to the visitor confirmation request and a display means for displaying the visitor image signal read out from the memory means in a form And a second signal processing means for processing the visitor information System. The visitor monitoring system according to claim 1, wherein the controller always checks the current time and also stores the current time when the visitor image signal is stored in the memory means. 3. The method according to claim 1 or 2, wherein the control unit determines that the visitor signal is not stored in the memory means when the visitor detection signal from the sensor is repeatedly applied within a predetermined time, Visitor monitoring system for absenteeism. The apparatus according to claim 1, wherein the first signal processing unit comprises: a switch unit for selectively outputting a video signal and a television video signal of the video camera under the control of the control unit; A color demodulator / demultiplexer for demultiplexing the separated luminance signal and color signal to output a luminance signal and a two-color signal, separating a horizontal synchronous signal and a vertical synchronous signal, and outputting the separated luminance signal and the vertical synchronous signal; An A / D converter for A / D converting the luminance signal and the two color signals, and a multiplexer for multiplexing the A / D-converted luminance signal and the two color signals and outputting the resultant to the memory. Visitor monitoring system for absenteeism. 5. The apparatus of claim 4, wherein the memory means comprises: a PLL unit for receiving the horizontal synchronizing signal and generating a system clock; a vertical synchronizing signal receiving unit for receiving the horizontal synchronizing signal and the vertical synchronizing signal, A video RAM for storing the multiplexed video signal under the control of the control unit at a position indicated by the write address and reading a video signal stored under the control of the controller at a position indicated by the read address; And a VRAM controller for setting an environment of the video RAM. 6. The apparatus as claimed in claim 5, wherein the second signal processing means comprises: a demultiplexer for demultiplexing the image signal read from the memory means and outputting the demultiplexed image signal as a luminance signal and a color signal; a D / And a matrix unit for converting the D / A-converted luminance signal and color signals into red, green, and blue color signals according to a predetermined matrix expression, and displaying the converted signals. ※ Note: It is disclosed by the contents of the first application.