KR101609876B1 - CCTV CCTV CCTV An Unit A Managing Device And A Method Of Transmitting Receiving Vedio Control Signal For CCTV - Google Patents

Abstract

The present invention relates to a CCTV video and control signal transmitting and receiving method. The CCTV video and control signal transmitting and receiving method according to the present invention includes a CCTV camera relay unit in which K video image and control signal transmitting and receiving units are sequentially connected to a sequential video cable and a control cable, And CCTV video and control signal transmission / reception management apparatus for performing control management of the CCTV camera relay unit by being connected to each other by a cable and a control cable, and a CCTV video and control signal transmission / reception method performed in the CCTV video and control signal transmission / A forwarding step in which the video signals and the system status information of each CCTV camera are sequentially multiplexed and relayed in the first direction and the control signals of the respective CCTV cameras are sequentially relay transmitted in a second direction opposite to the CCTV camera; If the N-th CCTV video and control signal transmission / reception unit receives the reverse mode switching signal from the device immediately after the N-th CCTV video and control signal transmission / reception unit is in progress, or if the CCTV video and control signal transmission / And the transmission / reception direction of the video signal or the control signal of the video signal is reversed.

Description

[0001] The present invention relates to a CCTV video and control signal transmission / reception unit, a CCTV video and control signal transmission / reception management apparatus, and a CCTV video and control signal transmission /

The present invention relates to transmission and reception of CCTV video and control signals, and more particularly, to a system and method for transmitting and receiving video and control signals for a plurality of CCTV cameras as a TS signal through a single video cable using digital broadcast data transmission / reception technology, CCTV video and control that provides a monitoring technique to quickly and accurately identify abnormalities of the CCTV video signal transmission / reception system by relaying video and control signals to and from each other in opposite directions by connecting cables and control cables in a double ring structure Signal transmitting / receiving unit, a CCTV video and control signal transmission / reception management apparatus, and a CCTV video and control signal transmission / reception method.

As shown in FIG. 1, since the conventional analog CCTV is connected in a 1: 1 ratio between the camera 10 and the central control center server 20 DVR, the number of cameras 10 is the same as that of the coaxial Cable 11 is present. This increases the cost of maintenance as well as construction.

Meanwhile, digitalization and upgrading of CCTV using HD-SDI in accordance with the UHDTV era is progressing. However, as with the conventional analog CCTV, a coaxial cable 11 is provided between the central control center server 20 and the DVR, The same problem as the conventional analog method occurs.

In the case of HD-SDI, uncompressed data of up to 1.5Gbps is transmitted only up to 150m due to the characteristics of the signal. Therefore, when the distance between the camera and the DVR of the central control center is long, it is necessary to use a repeater. do.

In recent years, CCTV systems using high-quality IP cameras have attracted attention due to improvements in performance and prices of IP cameras. However, due to the characteristics of IP signals, the signal transmission distance is only 100 m, This also increases construction and maintenance costs because there are restrictions on the number of switch hubs that must be installed.

In all three cases, if there is a problem in the system, it is difficult to know whether it is a camera problem, a switch hub problem or a cable problem.

An object of the present invention is to provide a digital video transmission and reception system capable of transmitting and receiving video and control signals for a plurality of CCTV cameras through a single video cable in the form of a TS signal and connecting a video cable and a control cable in a double ring structure CCTV video and control signal transmission / reception unit that provides a monitoring technique for quickly and accurately grasping the abnormality of the CCTV video signal transmission / reception system by relaying video signals and control signals to / from each other in opposite directions, CCTV video and control signal transmission / reception management And a method of transmitting and receiving CCTV video and control signals.

According to an aspect of the present invention, there is provided a CCTV video and control signal transmitting and receiving unit, wherein a plurality of CCTV video and control signal transmitting and receiving units are relay-connected by a video cable and a control cable to transmit and receive video and control signals, And a control signal transmitting and receiving unit, which is connected to a CCTV camera and transmits and receives video and control signals; A TS switching module for converting a signal including the CCTV camera video signal input from the camera connection section into a TS compressed video signal; And a second video switch for automatically switching the TS compressed video signal to a video transmission unit for transmitting the TS compressed video signal through the one video cable when the specific signal is detected while operating as a video receiving unit for receiving the TS compressed video signal through the one video cable, A video signal transmitting / receiving unit; When a specific signal is detected, the operation as the image transmission unit is stopped and the image is automatically switched to the image receiving unit which receives the TS compressed image signal through the other image cable A second video signal transmitting / receiving unit; The TS compressing video signal received by the first video signal transmitting and receiving unit, the output signal of the TS converting module, and the system status information are multiplexed to form a single TS into the second video signal transmitting and receiving unit, A TS mux that multiplexes the received TS compressed video signal of the second video signal transmitting / receiving unit, the output signal of the TS switching module, and the system status information and inputs the multiplexed signal to the first video signal transmitting / receiving unit; And a control signal transmitting unit for transmitting a control signal including a signal for controlling another CCTV camera through the one control cable. When the specific signal is detected, the operation as the control signal transmitting unit is stopped and the control signal is automatically transmitted through the one control cable A first control signal transmitting / receiving unit for switching to a control signal receiving unit for receiving a control signal including a control signal for controlling a CCTV camera; The CCTV camera is operated as a control signal receiving unit for receiving a signal including a control signal for controlling the CCTV camera through the other control cable. When the specific signal is detected, the operation as the control signal receiving unit is stopped, A second control signal transmission / reception unit for switching to a control signal transmission unit for transmitting a signal including a control signal for controlling the camera; Receiving a control signal for the CCTV camera through the first control signal transmitting / receiving unit or the second control signal transmitting / receiving unit to perform the CCTV camera control, and controlling the CCTV camera according to whether the specific signal is detected, And a control signal processing unit for selectively inputting a signal including the control signal to the first control signal transmission / reception unit or the second control signal transmission / reception unit.

The system status information includes status information of the CCTV camera, status information of the CCTV video and control signal transmitting / receiving unit, status information of both video cables, status information of both control cables, and video signal of a CCTV camera Or a CCTV camera control signal that is expected to be received via the control cable is not received.

The camera connection unit receives any one of the HD-SDI camera video signal, the HD camera video signal, the IP camera video signal, the HD-SDI camera video signal and the HD camera video signal, .

The first video signal transmitting and receiving unit and the second video signal transmitting and receiving unit can be connected to other CCTV video and control signal transmitting and receiving units according to the ASI or SMPTE 310 transmission protocol.

The specific signal includes a signal indicating that a control signal has not been received from the device immediately after the other control cable and a reverse mode switching signal included in the received control signal.

In order to achieve the above object, according to the present invention, there is provided an apparatus for managing CCTV video and control signal transmission and reception according to the present invention, wherein K pieces of CCTV video and control signal transmission and reception units are connected in series by video cables and control cables, And a control signal transmission / reception unit and a K-th CCTV video and control signal transmission and reception unit, which are connected to each other by a video cable and a control cable, respectively, to manage the video and control signal transmission and reception units A third video signal transmission / reception unit connected to a second video signal transmission / reception unit of the Kth CCTV video and control signal transmission / reception unit and operated as a video signal reception unit selectively by a video cable; A fourth video signal transmission / reception unit connected to a first video signal transmission / reception unit of the CCTV video and control signal transmission / reception unit and operated as a video signal reception unit selectively by a video cable; Receiving the multiplexed video signals of the respective CCTV cameras received by the third or fourth video signal transmitting and receiving unit and demultiplexing them by PID corresponding to each CCTV camera, TS demux to separate into information; A third control signal transmission / reception unit connected to the second control signal transmission / reception unit of the Kth CCTV video and control signal transmission / reception unit through a control cable and selectively acting as a control signal transmission unit; A fourth control signal transmission / reception unit connected to a second control signal transmission / reception unit of the CCTV video and control signal transmission / reception unit and operated by a control cable to selectively operate as a control signal transmission unit; Monitoring means for receiving system status information for each of the CCTV video and control signal transmitting and receiving units from the TS DEMUX and monitoring the system status information; An IP video and control data transmitting and receiving unit receiving video data of each of the CCTV cameras from the TS DEMUX and converting the IP video data into IP video data and transmitting IP data to an external device and receiving IP control data for each CCTV camera from an external device; The IP video and control data transmission / reception unit converts the control signals for the respective CCTV cameras received from the external device into TS signals and inputs them to at least one of the third and fourth control signal transmission / reception units, And a control signal management unit for relaying the control signal to the control signal transmission / reception unit.

According to another aspect of the present invention, there is provided a CCTV video and control signal transmission / reception management method comprising: a CCTV camera relay unit in which K video signal and control signal transmission / reception units are sequentially connected to a sequential video cable and a control cable; CCTV video and control signal transmission / reception management apparatus for performing control management on the CCTV camera relay unit by connecting the video cable and the control cable to each other at both ends of the CCTV video and control signal transmission / And a control signal transmitting / receiving method, wherein a video signal and system state information of each CCTV camera are sequentially multiplexed and relayed in a first direction, and a control signal of each CCTV camera is sequentially relayed in a second direction, Wow; If the N-th CCTV video and control signal transmission / reception unit receives the reverse mode switching signal from the device immediately after the N-th CCTV video and control signal transmission / reception unit is in progress, or if the CCTV video and control signal transmission / And the transmission / reception direction of the video signal or the control signal of the video signal is reversed.

When the device does not receive the video signal immediately after the switching, the backward switching signal receives the signal generated by the device immediately after the switching signal. If the device does not receive the CCTV camera control signal from the device immediately following the backward switching signal, To the relay station.

The reverse switching signal is generated when the CCTV video and control signal transmission / reception management apparatus detects the specific signal in the system status information through the video cable, generates the reverse switching signal, and outputs the reverse switching signal to the K- The CCTV image and the control signal transmission / reception unit are transmitted sequentially through the transmission / reception unit.

According to the present invention, it is possible to transmit and receive video and control signals for a plurality of CCTV cameras through a single video cable in the form of a TS signal using a digital broadcast data transmission / reception technique, And relaying video signals and control signals to and from each other in opposite directions, thereby providing a monitoring technique for quickly and accurately grasping the occurrence of abnormalities in the CCTV video signal transmitting / receiving system.

That is, each CCTV camera is connected to the CCTV video and control signal transmitting and receiving unit of the present invention, and when a plurality of CCTV video and control signal transmitting and receiving units are relay-connected to each other through a double ring structure and transmitted through each CCTV video and control signal transmitting and receiving unit, Since the TS compressed image of the CCTV camera is additionally multiplexed and transmitted as one TS, it is possible to transmit a plurality of CCTV video signals through one video cable. Finally, the CCTV video and control signal transmission / reception management apparatus includes two video cables and two control Cables can be connected and the use of repeaters or switch hubs can be minimized, saving construction and maintenance costs.

Since the CCTV camera control signal is transmitted in a direction opposite to the video signal through the double ring structure, the problem of each CCTV camera and each CCTV video and control signal transmitting / receiving unit is caused by the surrounding CCTV video and control signal transmitting / receiving unit or CCTV video and control The signal can be transmitted to the signal management apparatus, so that it is possible to accurately detect the device or the cable in which the abnormality occurs.

For example, if there is a problem with the image of the N-th CCTV camera in the conventional central control system, the N-th CCTV camera in question, the entire video cable from the camera to the central control system, However, the present invention is not limited to the case where an error occurs in each CCTV video and control signal transmission / reception device in the vicinity, And transmits it to the video and control signal transmission / reception unit or the CCTV video and control signal transmission / reception management device, and thus it can automatically detect the device and the point where the abnormality occurs, and minimizes the time and cost required for system recovery

1 is a schematic diagram illustrating a conventional CCTV system;
2 is a schematic diagram illustrating a CCTV video and control signal transmission / reception management system according to an embodiment of the present invention.
3 is a schematic diagram illustrating a CCTV video and control signal transmission / reception unit according to an embodiment of the present invention;
4 is a schematic diagram illustrating a CCTV video and control signal transmission / reception management apparatus according to an embodiment of the present invention.
5 is a schematic diagram illustrating a state in which the CCTV video and control signal transmission / reception management system of the embodiment of the present invention operates in a forward mode.
6 is a schematic diagram illustrating a state in which a CCTV video and control signal transmitting and receiving unit of the embodiment of the present invention operates in a forward mode;
FIG. 7 is a schematic diagram illustrating a state in which a CCTV video and control signal transmission / reception management apparatus in an embodiment of the present invention operates in a forward mode; FIG.
8 is a schematic diagram illustrating a state in which the CCTV video and control signal transmission / reception management system of the first embodiment of the present invention operates when a CCTV camera is abnormal.
9 is a schematic diagram illustrating a state in which the CCTV video and control signal transmission / reception management system of the second embodiment of the present invention operates in the reverse mode.
10 is a schematic diagram illustrating a state in which the CCTV video and control signal transmission / reception management system operates in a reverse mode according to the third embodiment of the present invention.
FIG. 11 is a schematic diagram illustrating a state in which the CCTV video and control signal transmission / reception management system of the fourth embodiment of the present invention operates in a reverse mode; FIG.
12 is a schematic diagram illustrating a state in which the CCTV video and control signal transmission / reception management system of the fifth embodiment of the present invention operates in a reverse mode;
13 is a schematic diagram illustrating a state in which a CCTV video and control signal transmitting and receiving unit of the embodiment of the present invention operates in a reverse mode;
FIG. 14 is a schematic diagram illustrating a state in which a CCTV video and control signal transmission / reception management apparatus operates in a reverse mode according to an embodiment of the present invention; FIG.

Hereinafter, a CCTV video and control signal transmission / reception unit, a CCTV video and control signal transmission and reception management apparatus, and a CCTV video and control signal transmission and reception method according to the present invention will be described in detail with reference to the accompanying drawings. do.

The CCTV video and control signal transmission and reception system of the present embodiment shown in FIG. 2 includes K video signal control and control signal transmission and reception units 200 to which at least one CCTV camera 100 is connected, 202 and the CCTV camera relay unit 300 are connected to the CCTV camera relay unit 300 via the video cable 201 and the control cable 202, And a CCTV video and control signal transmission / reception management unit 500 for performing control management of the CCTV unit 300.

The CCTV image and control signal transmission and reception unit 200 of this embodiment shown in FIG. 3 includes a camera connection unit 210 connected to the CCTV camera 100 to receive a video signal, A TS switching module 220 for switching to a TS compressed video signal, first and second video signal transmitting and receiving units 231 and 232 for externally transmitting and receiving a signal including a TS compressed video signal corresponding to the CCTV camera output, A TS mux 230 for multiplexing the received TS compressed video signal, the output signal of the TS switching module 220 and the system status information into a single TS, and a transmitting / receiving unit 220 for transmitting / receiving a control signal for controlling each CCTV camera 100 A control signal processing unit 250 for receiving control signals from the first or second control signal transmitting and receiving units 251 and 252 and controlling the CCTV camera 100 according to the first and second control signal transmitting and receiving units 251 and 252, ).

At least one CCTV camera 100 or a photographing module of a CCTV camera is connected to the camera connection unit 210 of the present embodiment to input image data of the CCTV camera 100. An input signal of the camera connection unit 210 is input to a general CCTV Camera digital data, HD-SDI camera output data, HD-SDI camera signal compressed data output, HD camera output digital image compressed data, IP data, and the like. Can be input.

For example, the CCTV image and control signal transmission / reception unit 200 of the present embodiment is formed as an integral device including the CCTV camera 100, and can directly receive the digital signal of the photographing module, It is also possible to receive a video signal of the video signal processing unit 100 through a cable as transmission data such as HD-SDI, SMPTE 310, DVB-ASI, or IP.

The TS switching module 220 of the embodiment of the present invention converts the H.264 (MPEG 4) compressed video signal of the CCTV camera input through the camera connection unit 210 into the MPEG 2 TS transmission format and inputs the signal to the TS mux 230 can do. On the other hand, the TS conversion module 230 may include the compression means of the image data. For example, when the input data is uncompressed data input in the HD-SDI format, the compression means compresses H.264 (MPEG 4) It is also possible to form a video signal and to form an MPEG 2 TS video signal, which is a transmission format, and another algorithm can be applied according to the embodiment.

The MPEG 2 TS of the present embodiment is formed of a packet unit having a fixed size of 188 bytes. Since a header is assigned to each packet, a separate PID is assigned to each camera, so that signals can be distinguished for each camera. Of MPEG 2 TS into one MPEG 2 TS.

The first video signal transceiving unit 231 of the embodiment of the present invention operates as an image receiving unit for receiving the TS compressed video signal through the one video cable and outputs a specific signal (for example, a reverse mode switching signal or a control signal A reception failure signal, etc., hereinafter the same), it operates as a video transmission unit for transmitting the TS compressed video signal to the one side video cable 201 in the reverse mode.

Meanwhile, the second video signal transmitting and receiving unit 232 of the present embodiment operates as a video transmitting unit that transmits the TS compressed video signal to the other video cable 201, and when it detects a specific signal, the second video signal transmitting and receiving unit 232 becomes a reverse mode, And operates as an image receiving unit for receiving the TS compressed video signal through the channel selection unit 201.

The first and second video signal transmitting and receiving units 231 and 232 of the present embodiment transmit and receive the TS compressed video signal through the coaxial cable in the SMPTE 310 or DVB-ASI format, but the present invention is not limited thereto.

Here, DVB-ASI is a transmission format used in digital broadcasting, and is the most universal digital broadcasting signal transmission system having a data rate of up to 214Mbps and a signal arrival distance of up to 400m.

Meanwhile, SMPTE 310 is a broadcasting signal transmission format that is mainly used in the United States, and has a data transmission rate of up to 19.3 Mbps and a signal transmission distance of up to 560 m.

In addition, the two transmission methods are mainly used in a digital broadcasting environment, and the data used in the transmission method uses a digital signal packetized according to the MPEG 2 TS standard of the ISO 13818-1 standard, and each packet has a fixed size of 188 bytes .

2, the first video signal transmitting / receiving unit 231 of the N (1 <N <K) th CCTV video and control signal transmitting / receiving unit 200 of the CCTV camera relay unit 300 of the present embodiment receives the And a second video signal transmitting and receiving unit is connected to the (N + 1) th CCTV video and control signal transmitting and receiving unit to transmit and receive a TS compressed video signal.

The first video signal transmitting and receiving unit of the first CCTV video and control signal transmitting and receiving unit 200 and the second video signal transmitting and receiving unit of the Kth CCTV video and control signal transmitting and receiving unit are connected to the CCTV video and control signal transmitting and receiving management unit 500, Is connected by a cable (201).

The TS mux 230 of the present embodiment multiplexes the TS compressed video signal received by the first video signal transmitting / receiving unit 231, the output signal of the TS switching module 220, and the system status information in the forward mode, And may be input to the second video signal transmitting and receiving unit 232. The TS mux 230 multiplexes the TS compressed video signal received by the second video signal transmitting and receiving unit 232, the output signal of the TS switching module 220, and the system status information in the zero direction mode, 1 video signal transmission / reception unit 231 as shown in FIG.

For example, the TS mux 230 of the N-th CCTV image and control signal transmission and reception unit 200 of the present embodiment of FIG. 5 transmits the 1-th to (N-1) -th CCTV images and the control signal transmission and reception unit 200, (TS) compression video signal of the CCTV camera 100 is multiplexed with the output signal of the TS conversion module 220 and the system status information of the first video signal transmission / reception unit 231, 2 video signal transmitting / receiving unit 232. [

9 to 11, the first to (N-1) th CCTV video and control signal transmission and reception units 200 input the TS compressed video signal from the second video signal transmission and reception unit 232 The output signal of the TS conversion module 220 and the system status information of the received signal can be multiplexed together and input to the first video signal transmitting and receiving unit 231. [

In this embodiment, the TS mux 230 can multiplex the TS compressed video signal corresponding to each CCTV camera 100 and the system status information corresponding to the CCTV camera by assigning the same PID to each CCTV camera 100, And a plurality of CCTV cameras 100 connected to the control signal transmission / reception unit 200, it is possible to assign a separate PID to each CCTV camera.

The system status information of the present embodiment includes information on whether the CCTV camera is normally operated, whether the CCTV video and control signal transmitting / receiving unit is normally operated, the connection status of the video or control cable, and the CCTV video and control signal transmission / And information on the state of reception of the video signal or the control signal.

The first control signal transmission and reception unit 251 of the present embodiment operates as a control signal transmission unit that transmits a control signal including a signal for controlling another CCTV camera 100 through the one control cable 202, The CCTV camera 100 operates as a control signal receiving unit that receives a control signal including a control signal for controlling the CCTV camera 100 through the one side control cable 202

The second control signal transmitting and receiving unit 252 of the present embodiment operates as a control signal receiving unit that receives a signal including a control signal for controlling the CCTV camera 100 through the other control cable 202, The CCTV camera 100 operates as a control signal transmission unit that transmits a signal including a control signal for controlling another CCTV camera 100 through the other control cable 202.

Therefore, as shown in FIG. 5, when the CCTV video and control signal transmission / reception system of the present embodiment is in the forward mode, the video signals are sequentially transmitted in the clockwise direction and the control signals are sequentially relayed in the counterclockwise direction. Accordingly, the video signal and the control signal are transmitted in opposite directions to obtain the system status information for the CCTV video and control signal transmitting / receiving unit of the rearward of each direction.

The control signal processing unit 250 of the present embodiment controls the control signal received by the first control signal transmitting and receiving unit 251 in the reverse mode or the control signal received by the second control signal transmitting and receiving unit 252 in the forward mode Receives the input, extracts a control signal for the CCTV camera 100 to which the CCTV camera 100 is controlled, and controls the CCTV camera 100 to be controlled. In addition, the control signal for the other CCTV camera 100 and the system status information are received and converted into the TS signal. When the mode is the forward mode, the control signal is input to the first control signal transmission / reception unit 251, To the control signal transmission / reception unit 252.

In this embodiment, the system status information is generated by the TS mux 230 or the control signal processing means 250, and is multiplexed with the TS compressed image signal in the TS mux and transmitted to the external device. Meanwhile, according to the embodiment, the system status information may be multiplexed in the TS mux and additionally multiplexed as a TS control signal and transmitted to an external device. In addition, the system status information may be generated by the TS generation module 220 and may be different depending on the embodiment.

The CCTV image and control signal transmission and reception management apparatus 500 of this embodiment shown in FIG. 4 is connected to the K-th CCTV image and control signal transmission and reception unit 200 of the camera relay unit 300 through a video cable 201 A fourth video signal transmitting and receiving unit 504 connected to the first CCTV video and control signal transmitting and receiving unit 200 through a video cable 201 and a fourth video signal transmitting and receiving unit 504 connected to the CCTV camera relay unit 300, A TS demultiplexer 530 for demultiplexing the multiplexed TS compressed video signal received at the K th CCTV video and control signal transmitting and receiving unit 200 and a third control signal transmitting and receiving unit A fourth control signal transmitting and receiving unit 514 connected to the first CCTV video and control signal transmitting and receiving unit 200 through a control cable 202 and a CCTV camera relay unit 300 monitoring Monitoring means 550 and a CCTV camera 100 of the TS demux 530 output, An IP video and control data transmission / reception unit 540 for IP transmission of video data to an external device and IP reception of control data 202 for each CCTV camera 100 of the CCTV camera relay unit 300 from an external device, And a control signal management unit 560 for transmitting and receiving control signals to and from the camera relay unit 300.

5, the third video signal transmitting and receiving unit of the present embodiment operates as a video receiving unit for receiving a video signal from the K-th CCTV video and control signal transmitting and receiving unit, and receives the 1-Kth CCTV video and control signal The CCTV TS compressed video signal for the transmitting / receiving unit is multiplexed into a single TS from the K-th CCTV video and control signal transmitting / receiving unit.

5, in the forward mode, the fourth video signal transmitting / receiving unit 504 is connected to the first CCTV video and control signal transmitting / receiving unit 200 through a video cable 201, Do not contribute.

9 to 11, when there is a video / control signal transmission / reception problem between Nth and N + 1th, for example, when the first to Nth CCTV video and control signal transmission / reception units 200 are in the reverse direction Mode, the fourth video signal transmitting and receiving unit 504 of the present embodiment operates as a video signal receiving unit for receiving a video signal from the first video and control signal transmitting and receiving unit 200 and controls the first through N-th CCTV video and control From the first CCTV image and control signal transmission / reception unit 200, a CCTV camera compressed video signal for the signal transmission / reception unit 200 is multiplexed into a single TS.

In this case, the third video signal transmitting and receiving unit 503 receives the CCTV video and control signal transmission and reception unit 200 of the CCTV camera relay unit 300, The CCTV camera video signal for the signal transmitting and receiving unit 200 is multiplexed into a single TS from the second video signal transmitting and receiving unit 232 of the K-th CCTV video and control signal transmitting and receiving unit 200.

5, the third control signal transmitting / receiving unit 513 of the present embodiment transmits a control cable (not shown) to the second control signal transmitting / receiving unit 232 of the K-th CCTV video and control signal transmitting / And the fourth control signal transmission and reception unit 514 is connected to the first CCTV video and control signal transmission and reception unit 200 through a control cable 202. However, It does not contribute to signal transmission / reception.

9 to 11, the fourth control signal transmitting / receiving unit 514 transmits the first control signal to the first control signal transmitting / receiving unit 252 of the first CCTV video and control signal transmitting / receiving unit 200 through the control cable 202 And can operate as a control signal transmission unit for transmitting a CCTV camera control signal.

For example, as shown in FIGS. 9 to 11, there is a problem of transmission / reception of video / control signals between the Nth and (N + 1) th video signal transmitting / receiving units 200 and the first to Nth CCTV video and control signal transmitting / When operating in the reverse mode, the (N + 1) th to Kth video and control signal transmission / reception units 200 operate in the forward mode. In this case, the third control signal transmission / reception unit 513 operates as a control signal transmission unit for transmitting a CCTV camera control signal to the (N + 1) th to Kth video and control signal transmission / reception units 200, Unit 514 serves as a control signal transmission unit for transmitting a CCTV camera control signal to the 1 st through N th video and control signal transmission and reception unit 200.

The TS demultiplexer 530 of the embodiment of the present invention receives the compressed video signal for each CCTV camera 100 received by the third or fourth video signal transmitting and receiving unit as a single TS, And separates the packet data of each PID into video data and system state information for each CCTV camera 100. [

The TS demultiplexer 530 extracts only the payload from the separated video data packet, inputs the extracted payload to the IP video and control data transmission / reception unit 540, and inputs the system status information to the monitoring means 550.

The IP video and control data transmitting and receiving unit 540 of this embodiment receives the payload data of the video packets of the CCTV camera 100 input from the TS demultiplexer 530 and converts the payload data into IP data, VMS 820, CMS 810 and the like while transmitting to the storage device 800, the NVR 830, the VMS 820 and the CMS 810, And inputs the control data to the control signal management unit 560.

The monitoring means 550 of the present embodiment receives the system status information from the TS demultiplexer 530, for example, and monitors the CCTV camera relay unit 300. For example, monitoring is performed for the arbitrary CCTV camera 100, the arbitrary CCTV image and control signal transmission / reception unit 200 and the arbitrary image cable 201 and the control cable 202, If transmission or reception of video or control signals is not smooth, an error event corresponding thereto is generated and transmitted to the manager.

On the other hand, the monitoring unit 550 may not receive the TS compressed video signal of the N-th CCTV video and control signal transmission / reception unit 200 due to, for example, disconnection of the video cable 201 or the control cable 202, If there is an error in the received video signal or the like, the corresponding error event is generated. If the video can not be received, an event requesting the reverse mode switching may be generated and input to the control signal management unit 560.

In this case, the CCTV video and control signal transmission / reception management apparatus can be switched to the backward mode in response to an event requesting the backward mode switching. In this case, if the control cable is normal according to the embodiment, the control signal management unit 560 transmits a control signal for operating the first to N-th CCTV video and control signal transmission / reception units 200 in the reverse mode to the third control signal transmission / And the control signal is sequentially relayed to the (N + 1) -th CCTV video and control signal transmitting / receiving unit via the (K + 1) th CCTV video and control signal transmitting / receiving unit 200, The CCTV video and control signal transmitting / receiving unit can be operated in the reverse mode.

Next, a system recovery process according to the CCTV video and control signal transmission / reception method performed in the CCTV video and control signal transmission / reception system having the above configuration will be described.

&Lt; Embodiment 1 >

8, when the CCTV video and control signal transmission / reception system of the present embodiment is operating in the forward mode and only the M CCTV camera 100 corresponding to the N-th CCTV video and control signal transmission / reception unit 100 is abnormal There is no abnormality in the transmission of the video signal or the control signal.

Therefore, the N-th CCTV video and control signal transmission / reception unit 100 includes a camera error information packet in the system status information, multiplexes the packet with the TS compressed video signal, and transmits the multiplexed signal to the N + 1th video and control signal transmission / reception unit. This information is sequentially relay-transmitted through the subordinate CCTV video and control signal transmission and reception units 200 and input to the CCTV video and control signal transmission and reception management apparatus 500 through the third video transmission and reception unit 503, Generates an error event for the M CCTV camera (100).

&Lt; Embodiment 2 >

9, when a problem occurs in the video cable 201 between the Nth and (N + 1) th CCTV video and control signal transmission / reception units 200 during the forward mode operation, the following process is performed.

The (N + 1) th CCTV video and control signal transmission and reception unit 200 detects that the video signal is not transmitted from the N-th CCTV video and control signal transmission and reception unit 200.

The (N + 1) -th CCTV video and control signal transmission / reception unit 200 includes system state information in which the N-th CCTV video and control signal transmission / reception impossible information from the transmission / reception unit 200 is included in the system state information, To the subordinate CCTV video and control signal transmission / reception unit 200, and finally inputted to the CCTV video and control signal management device 500.

The monitoring means 550 of the CCTV video and control signal management apparatus 500 detects a transmission error from the system status information of the output of the TS demultiplexer 530 and generates an event informing that the video cable 201 is abnormal.

On the other hand, when the (N + 1) -th CCTV video and control signal transmission / reception unit 200 detects that the video signal can not be received from the N-th CCTV video and control signal transmission / reception unit 200, the control signal processing unit 250 And transmit the reverse mode switching signal to the N-th CCTV video and control signal transmission / reception unit 200. [

The N-1th CCTV video and control signal transmission and reception unit 200 transmits the reverse mode switching signal to the N-1th CCTV video and control signal transmission and reception unit 200 in sequence, And switches its own system mode to the reverse mode when a certain period of time has elapsed.

Meanwhile, in another embodiment, the reverse mode switching signal is transmitted from the system state information of the output of the TS demux 530 to the CCTV image and control signal transmission / reception management unit 500, And generates a reverse mode switching signal to be transmitted to the CCTV camera relay unit 300. In this case, as described above, the (K + 1) -th CCTV video and control signal transmission / reception unit 200 bypasses this signal, and the (N + 1) -th CCTV video and control signal transmission / It is possible to configure the system mode to be switched to the reverse mode when a predetermined time has elapsed after transmission of the system mode.

When the first to N-th CCTV video and control signal transmission and reception units 200 of the present embodiment switch the system mode in the reverse mode, these CCTV video and control signal transmission and reception units transmit video signals in the counterclockwise direction, . Accordingly, the first video signal transmitting / receiving unit of each of the first through N-th CCTV video and control signal transmitting / receiving units 200 operates as an image transmitting unit, the second video signal transmitting / receiving unit operates as a video receiving unit, And the second control signal transmitting / receiving unit to the receiving unit operates as a control signal transmitting unit.

The CCTV video and control signal transmission and reception management apparatus 500 of the second embodiment transmits control signals for the CCTV cameras of the first to N-th CCTV video and control signal transmission and reception units 200 to the fourth control signal transmission and reception unit 514 and sequentially transmitted to the 1 st through N th CCTV video and control signal transmitting and receiving units.

The control signal management unit also receives control signals for the CCTV cameras of the (N + 1) th to K CCTV video and control signal transmission and reception units 200 to the third control signal transmission and reception unit 513, ) CCTV video and control signal transmission / reception unit 200

The N CCTV video and control signal transmission / reception unit 200 sequentially transmits the video signals in the reverse direction, that is, counterclockwise, and transmits the CCTV video and control signal through the fourth video signal transmission / (500).

The video signals of the CCTV cameras of the (N + 1) th to K CCTV video and control signal transmission and reception units 200 are sequentially relay transmitted in the forward direction (clockwise direction), and the video signals of (N + Unit is input to the CCTV video and control signal transmission and reception management apparatus 500 through the third video signal transmission and reception unit 503. [

 The TS compressed video signals of the 1 st to K th CCTV cameras transmitted by the CCTV video and control signal transmission and reception management apparatus 500 are separated by the PID corresponding to each CCTV camera in the TS demux 230, And inputs the extracted data to the IP video and control data transmitting / receiving unit 540. [

The IP video and control data transceiver 540 converts the video data into IP data and transmits the IP data to an external device such as an image storage device, NVR, VMS, or CMS.

&Lt; Example 3 >

10 illustrates a case where the control cable 202 between the Nth and (N + 1) th CCTV video and control signal transmission and reception units 200 is disconnected.

That is, the N-th CCTV video and control signal transmission and reception unit 200 detects that the CCTV camera control signal is not received from the (N + 1) -th CCTV video and control signal transmission and reception unit 200.

The control signal processing unit 250 generates a reverse mode switching signal and inputs the signal to the first control signal transmission / reception unit 251, and the TS mux 230 transmits the system status information including the control signal reception error information to the TS compressed video signal And transmits them to the second video signal transmitting and receiving unit 252 so that they can be sequentially relay transmitted to the CCTV video and control signal transmission and reception management apparatus 500.

The reverse mode switching signal may be sequentially relayed to the Nth through the 1 st CCTV video and control signal transmission and reception unit 200 and the CCTV video and control signal transmission and reception management apparatus in the counterclockwise direction and each CCTV video and control signal transmission and reception unit 200 Switches its own mode to the reverse mode after a predetermined time elapses after transmission of the reverse mode switching signal, respectively.

Meanwhile, the CCTV video and control signal transmission / reception management apparatus 500 which finally receives the system state information informing the backward mode switching signal or the control signal transmission error also switches the system mode to the backward mode, Ali generates an event.

The operations of the CCTV camera relay unit 300 and the CCTV video and control signal transmission and reception management apparatus 500 after the modes are switched to the reverse mode are the same as those of the second embodiment.

<Example 4>

The video cable 201 and the control cable 202 between the Nth and N + 1th CCTV video and control signal transmission and reception units 200 are disconnected and the CCTV video and control signal transmission and reception unit 200 ), If both the video and control signals can not be transmitted or received, the restoration procedure is performed by the following procedure.

When the N-th CCTV video and control signal transmission and reception unit 200 does not receive the control signal from the (N + 1) -th CCTV video and control signal transmission and reception unit, the N-th CCTV video and control signal transmission and reception unit 200 generates a reverse mode switching signal, Unit 200 and the CCTV video and control signal transmission / reception management apparatus.

As in the case of the second and third embodiments, the Nth through the first CCTV video and control signal transmission and reception unit 200 are sequentially switched to the reverse mode when a predetermined time elapses after the backward switching signal is transmitted. The CCTV video and control signal transmission / reception management apparatus 500 which has finally received the reverse mode switching signal or the system status information also switches the mode to the reverse mode.

Meanwhile, the N + 1 CCTV video and control signal transmission / reception unit 200 includes (N + 1) th video signal and the TS signal together with the other video signal including the video signal incapability information in the system status information as in the second embodiment, The monitoring unit 550 transmits a transmission error signal from the output of the TS demultiplexer 530 to the CCTV video and control signal transmission and reception management apparatus 500 through the K CCTV video and control signal transmission and reception unit 200 in sequence And generates an event informing that there is a problem in the corresponding video cable 201 and the control cable 202.

The operations of the CCTV camera relay unit 300 and the CCTV video and control signal transmission and reception management apparatus 500 after the modes are switched to the reverse mode are the same as those of the second embodiment.

&Lt; Example 5 >

As shown in FIG. 12, when the N-th CCTV video and control signal transmission / reception unit 200 fails to transmit and receive an image and a control signal due to a failure, the recovery operation is performed as when both the cables are disconnected.

When the (N-1) th CCTV video and control signal transmission and reception unit 200 does not receive the control signal from the N-th CCTV video and control signal transmission and reception unit, the reverse mode switching signal is generated and the (N-1) And the control signal transmission / reception unit 200 and the CCTV video and control signal transmission and reception management apparatus 500. [

As in the case of the second and third embodiments, the (N-1) th to the first CCTV video and control signal transmitting and receiving units are sequentially switched to the reverse mode when a predetermined time elapses after the reverse switching signal is transmitted. The CCTV video and control signal transmission / reception management apparatus finally receiving the reverse mode switching signal or the system status information also switches the mode to the reverse mode.

Meanwhile, the N + 1 CCTV video and control signal transmission / reception unit 200 includes (N + 1) th video signal and the TS signal together with the other video signal including the video signal incapability information in the system status information as in the second embodiment, The monitoring unit 550 transmits a transmission error signal from the output of the TS demultiplexer 530 to the CCTV video and control signal transmission and reception management apparatus 500 through the K CCTV video and control signal transmission and reception unit 200 in sequence And generates an event informing that there is a problem in transmission and reception of the N-th CCTV video and control signal.

It is obvious that the scope of the present invention is not limited to the above embodiments but is defined by the matters defined in the claims of the present invention and includes various modifications and alterations made by those skilled in the art within the scope of the claims.

100 .... CCTV camera
200 .... CCTV video and control signal transmitting and receiving unit
201 .... video cable 202 .... control cable
210 .... Camera connection part 220 .... TS conversion module
230 .... TS MUX 231 .... first video signal transmitting /
232 .... second video signal transceiver 250 .... control signal processor
251 .... First control signal transmitting / receiving unit 252 .... Second control signal transmitting /
300 .... CCTV camera relay part
500 .... CCTV video and control signal transmission and reception management device
503 .... a third video signal transmitting / receiving unit 504 .... a fourth video signal transmitting /
513 .... Third control signal transmission / reception section 514 .... The fourth control signal transmission /
530 .... TS DEMUX
540 .... IP video and control signal transmitting /
550 .... monitoring means 560 .... control signal management unit
800 .... Video storage device 810 .... CMS
820 .... VMS 830 .... NVR

Claims (9)

A CCTV video and control signal transmission and reception unit constituting a CCTV video and control signal transmission and reception system in which a plurality of video and control signals are relayed by a video cable and a control cable,
A camera connection unit connected to the CCTV camera to transmit and receive video and control signals;
A TS switching module for converting a signal including the CCTV camera video signal input from the camera connection section into a TS compressed video signal;
And a second video switch for automatically switching the TS compressed video signal to a video transmission unit for transmitting the TS compressed video signal through the one video cable when the specific signal is detected while operating as a video receiving unit for receiving the TS compressed video signal through the one video cable, A video signal transmitting / receiving unit;
When a specific signal is detected, the operation as the image transmission unit is stopped and the image is automatically switched to the image receiving unit which receives the TS compressed image signal through the other image cable A second video signal transmitting / receiving unit;
The TS compressing video signal received by the first video signal transmitting and receiving unit, the output signal of the TS converting module, and the system status information are multiplexed to form a single TS into the second video signal transmitting and receiving unit, A TS mux that multiplexes the received TS compressed video signal of the second video signal transmitting / receiving unit, the output signal of the TS switching module, and the system status information and inputs the multiplexed signal to the first video signal transmitting / receiving unit;
And a control signal transmitting unit for transmitting a control signal including a signal for controlling another CCTV camera through the one control cable. When the specific signal is detected, the operation as the control signal transmitting unit is stopped and the control signal is automatically transmitted through the one control cable A first control signal transmitting / receiving unit for switching to a control signal receiving unit for receiving a control signal including a control signal for controlling a CCTV camera;
The CCTV camera is operated as a control signal receiving unit for receiving a signal including a control signal for controlling the CCTV camera through the other control cable. When the specific signal is detected, the operation as the control signal receiving unit is stopped, A second control signal transmission / reception unit for switching to a control signal transmission unit for transmitting a signal including a control signal for controlling the camera; And
Receiving a control signal for the CCTV camera through the first control signal transmitting / receiving unit or the second control signal transmitting / receiving unit, performing the CCTV camera control, and controlling the CCTV camera according to whether the specific signal is detected And a control signal processing unit for selectively inputting a signal to the first control signal transmission / reception unit or the second control signal transmission / reception unit.
The system according to claim 1,
The status information of the CCTV camera, the status information of the CCTV video and control signal transmitting / receiving unit, the status information of both video cables, the status information of both control cables, and the video signal of the CCTV camera, And the CCTV camera control signal to be received through the cable is not received.
The camera according to claim 1,
And receives an HD-SDI camera video signal, an HD camera video signal, an IP camera video signal, a video signal obtained by compressing the HD-SDI camera video signal or an HD camera video signal, and inputs the received video signal to the TS switching module CCTV video and control signal transmission and reception unit
The CCTV system according to claim 1, wherein the first video signal transmitting and receiving unit and the second video signal transmitting and receiving unit can be connected to other CCTV video and control signal transmitting and receiving units according to the ASI or SMPTE 310 transmission protocol. .
The method according to claim 1,
A signal indicating that a control signal has not been received from the device immediately after the other side control cable, and a reverse mode switching signal included in the received control signal.
The method as claimed in any one of claims 1 to 5, wherein the first CCTV video and control signal transmission / reception unit and the Kth CCTV video and control signal transmission / reception unit are connected in a state in which the K CCTV video and control signal transmission / A CCTV video and control signal transmission / reception management unit for performing management of each video and control signal transmission / reception unit by being connected to a CCTV video and control signal transmission / reception unit by a video cable and a control cable, respectively,
A third video signal transmitting / receiving unit connected to a second video signal transmitting / receiving unit of the Kth CCTV video and control signal transmitting / receiving unit and operated as a video signal receiving unit selectively by a video cable;
A fourth video signal transmission / reception unit connected to a first video signal transmission / reception unit of the CCTV video and control signal transmission / reception unit and operated as a video signal reception unit selectively by a video cable;
Receiving the multiplexed video signals of the respective CCTV cameras received by the third or fourth video signal transmitting and receiving unit and demultiplexing them by PID corresponding to each CCTV camera, TS demux to separate into information;
A third control signal transmission / reception unit connected to the second control signal transmission / reception unit of the Kth CCTV video and control signal transmission / reception unit through a control cable and selectively acting as a control signal transmission unit;
A fourth control signal transmission / reception unit connected to a second control signal transmission / reception unit of the CCTV video and control signal transmission / reception unit and operated by a control cable to selectively operate as a control signal transmission unit;
Monitoring means for receiving system status information for each of the CCTV video and control signal transmitting and receiving units from the TS DEMUX and monitoring the system status information;
An IP video and control data transmitting and receiving unit receiving video data of each of the CCTV cameras from the TS DEMUX and converting the IP video data into IP video data and transmitting IP data to an external device and receiving IP control data for each CCTV camera from an external device; And,
A control signal for each CCTV camera received from an external device through the IP video and control data transceiver is converted into a TS signal and input to at least one of the third and fourth control signal transceivers, And a control signal managing unit for relaying the CCTV video and control signal to the transmitting and receiving unit.
A CCTV camera relay unit in which K CCTV image and control signal transmission / reception units are connected to a sequential video cable and a control cable, and a CCTV camera relay unit in which both ends of the CCTV camera relay unit are connected to each other by a video cable and a control cable, A CCTV video and control signal transmission / reception management device that performs control management for the CCTV video and control signal transmission / reception system,
Wherein the video signals and the system status information of the respective CCTV cameras are sequentially multiplexed and relayed in the first direction and the control signals of the respective CCTV cameras are sequentially relayed in a second direction opposite to the first direction;
If the N-th CCTV video and control signal transmission / reception unit receives the reverse mode switching signal from the device immediately after the N-th CCTV video and control signal transmission / reception unit is in progress, or if the CCTV video and control signal transmission / And the transmission and reception directions of the video signal or the control signal of the CCTV video and control signal are reversed, respectively.
The method of claim 7,
If the device does not receive the video signal immediately afterwards,
And when the CCTV camera control signal is not received from the immediately following device, the CCTV camera control unit generates a self reverse mode switching signal and relays the CCTV camera control signal to the previous devices.
The method of claim 7,
When the CCTV video and control signal transmission / reception management apparatus detects a specific signal in the system status information through a video cable, the control unit generates the reverse mode switching signal and transmits the reverse mode switching signal through the K to N + 1th CCTV video and control signal transmission / To the N-th to the N-th CCTV video and control signal transmitting and receiving units.

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