KR200238157Y1 - Event Recorder of Closed Circuit Television System - Google Patents

Abstract

Event occurrence history recording apparatus of the CCTV system of the present invention is an input control unit for sequentially converting the video signal input from a plurality of video cameras in field or frame units; A decoder for separating the synchronization signal from the analog image signal sequentially converted from the input controller, separating the synchronization signal into a luminance and a chrominance signal, and then digitally converting the signal; A memory unit to temporarily store the signal digitally converted by the decoder; A memory control unit controlling timing of writing and reading of the memory unit; And an encoder for converting the digital signal read out from the memory unit into an analog signal and converting the converted signal into a composite video signal by putting a synchronization signal received through the memory controller into the converted signal. An image loss detection unit detecting whether there is an image loss in the input image signal; An alarm detection unit for detecting an alarm by a sensor provided at an appropriate position of the monitoring area; And when the video loss or alarm occurs from the video loss detection unit or the alarm detection unit, record time and generation channel information when the video loss or alarm occurred, and record an image of the moment when the video loss or alarm is detected. And a control unit for controlling to store the data.

Description

Event Recorder of Closed Circuit Television System

The present invention relates to an event history recording device of a CCTV system. More specifically, when an alarm or a video loss occurs in a CCTV system, the event record is recorded in a memory along with the event occurrence history along with the event occurrence history. The present invention relates to an incident recording device of a CCTV system, which allows a user to search an image of the moment when an incident occurs.

In general, CCTV (Close Circuit Tele-Vision) system is installed in general houses, department stores, bank factories, and exhibition halls, and is widely used for surveillance to prevent theft and to easily check the operation status and process flow of machines. It refers to a device installed in an intersection, etc., which is also used to identify traffic conditions. As described above, the conventional CCTV system sequentially records one or more video cameras and video cameras that capture a surveillance target one frame at a time. A switcher for switching and outputting, a monitor for outputting the image taken from the video camera, and a VCR for recording the image output from the switcher so that the image taken by the video camera can be reproduced later.

In the conventional CCTV system, when an alarm or video loss occurs, the occurrence history (occurrence time and occurrence channel) is recorded in a memory so that the user can inquire the details if necessary.

However, in the conventional CCTV system, since only the occurrence list is recorded as described above, if you want to search the screen at the time of occurrence, it is difficult to search the screen corresponding to the occurrence time and the occurrence channel every time using the tape recorded on the VCR. If the VCR is not recorded, a problem arises in that the video cannot be searched at the time of occurrence.

The present invention was devised to solve the above-mentioned problems, and when an alarm or video loss occurs in a CCTV system, the event occurrence moment when the event occurrence inquiry is recorded by recording an image of the event occurrence moment along with the event occurrence history in memory. Its purpose is to provide a device for recording incident occurrence history of a CCTV system that can be searched together with video.

Event occurrence history recording apparatus of the CCTV system of the present invention for achieving the above object is an input control unit for sequentially converting the video signal input from a plurality of video cameras in units of fields or frames; A decoder for separating the synchronization signal from the analog image signal sequentially converted from the input controller, separating the synchronization signal into a luminance and a chrominance signal, and then digitally converting the signal; A memory unit to temporarily store the signal digitally converted by the decoder; A memory control unit controlling timing of writing and reading of the memory unit; And an encoder for converting the digital signal read out from the memory unit into an analog signal and converting the converted signal into a composite video signal by putting a synchronization signal received through the memory controller into the converted signal. An image loss detection unit detecting whether there is an image loss in the input image signal; An alarm detection unit for detecting an alarm by a sensor provided at an appropriate position of the monitoring area; And when the video loss or alarm occurs from the video loss detection unit or the alarm detection unit, record time and generation channel information when the video loss or alarm occurred, and record an image of the moment when the video loss or alarm is detected. And a control unit for controlling to store the data.

1 is a system block diagram electrically showing the configuration of the event occurrence history recording apparatus of the CCTV system of the present invention,

2 is a flowchart illustrating a recording method in the event history recording apparatus of the CCTV system of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

110. input control unit, 120. decoder,

130. Memory unit, 140. Memory control unit,

150. encoder, 160. motion and video loss detector,

170. Alarm detection unit, 180. Control unit

Hereinafter, with reference to the accompanying drawings will be described in detail the event occurrence history recording apparatus of the CCTV system according to a preferred embodiment of the present invention.

1 is a system block diagram electrically showing the configuration of the event occurrence history recording apparatus of the CCTV system of the present invention. As shown in this figure, the event occurrence history recording apparatus of the CCTV system of the present invention includes an input control unit 110 for sequentially converting video signals input from a plurality of video cameras (not shown) in field or frame units, and input. Decoder for separating the horizontal and vertical synchronizing signals (H-SYNC, V-SYNC) from the analog image signal sequentially converted from the control unit 110 into luminance (Y) and chrominance signals (BY, RY) and digital conversion A memory unit 130 for temporarily storing a signal digitally converted by the decoder 120, a memory control unit 140 for controlling timing of writing and reading of the memory unit 130, and a memory unit The encoder 150 converts the digital signal read out from the digital signal into an analog signal and loads the sync signal received through the memory controller 140 into a composite video signal, and selects the input signal from the input controller 110. Motion and video loss detection unit 160 for detecting whether there is motion and video loss in the input video signal, an alarm detection unit 170 for detecting an alarm (invader, etc.) by an alarm sensor, and video loss or alarm generation. In this case, the controller 180 is configured to record the time when the video loss or the alarm occurred and the occurrence channel, and to store the image of the moment when the video loss or the alarm is detected in the memory.

In the above-described configuration, the motion and image loss detection unit 160 compares the image selected and input by the input control unit 110 and detects when a motion occurs in the existing image, and detects the motion and image loss detection unit 160. Separates a synchronous signal from an image signal input by the synchronous separation IC. Therefore, the controller 180 which receives the synchronization signal separated by the motion and image loss detection unit 160 determines that there is an image loss when the synchronization signal is not input for a predetermined time.

On the other hand, the alarm detection unit 170 detects an alarm channel by an alarm sensor, the alarm sensor is installed in the periphery where each camera is installed to detect an alarm (invaders, etc.), and the alarm is detected to detect the detection value (the alarm detection unit ( 170, the channel data of the camera linked with the alarm sensor that detected the alarm is also transmitted.

2 is a flowchart illustrating a recording method in the event history recording apparatus of the CCTV system of the present invention.

First, in step S10, the system is initialized, and the process proceeds to step S12 to perform an operation corresponding to a key input through a key input unit (not shown) for inputting various functions. Thereafter, in step S14, it is determined whether an alarm has occurred while performing an operation corresponding to the key input in step S12. If an alarm occurs as a result of the determination in step S14, the process proceeds to step S16 to record the event occurrence details such as the time at which the alarm occurred and the channel on which the alarm occurred, and the process proceeds to step S18. The image of the generated moment is stored in the memory.

On the other hand, if the alarm is not generated as a result of the determination in step S14, the process proceeds to step S20 to determine whether an image loss occurs. If the image loss occurs as a result of the determination in step S20, the process proceeds to step S22 to record the event occurrence details such as the time when the image loss occurred and the channel where the image loss occurred, and to the step S24. Proceed to store the image of the moment the image loss occurs in the memory. If the image loss does not occur as a result of the determination in step S20, the process proceeds to step S26 to perform the corresponding function.

Event occurrence history recording apparatus of the CCTV system of the present invention is not limited to the above-described embodiment can be carried out variously modified within the range allowed by the technical idea of the present invention.

According to the event occurrence history recording apparatus of the CCTV system of the present invention as described above, when the alarm or video loss occurs in the CCTV system, the event occurrence history by recording the image of the moment of occurrence together with the event occurrence history in the memory When searching, the video can be searched at the moment of occurrence, and if necessary, regardless of whether the VCR is recorded, the video can be searched at the moment of video loss and alarm occurrence.

Claims (1)

An input control unit for sequentially converting image signals input from a plurality of video cameras in field or frame units; A decoder for separating the synchronization signal from the analog image signal sequentially converted from the input controller, separating the synchronization signal into a luminance and a chrominance signal, and then digitally converting the signal; A memory unit to temporarily store the signal digitally converted by the decoder; A memory control unit controlling timing of writing and reading of the memory unit; And an encoder converting the digital signal read out from the memory unit into an analog signal and converting the converted signal into a composite video signal by loading a synchronization signal received through the memory controller into the converted signal. An image loss detection unit detecting whether there is an image loss in the image signal selected by the input control unit; An alarm detection unit for detecting an alarm by a sensor provided at an appropriate position of the monitoring area; And When a video loss or alarm occurs from the video loss detection unit or an alarm detection unit, the time and occurrence channel information of the video loss or alarm occurrence are recorded in the list, and the image at the moment when the video loss or alarm is detected is stored in the memory unit. Event occurrence history recording apparatus of the CCTV system comprising a control unit for controlling to store.