JP2848752B2 - Video surveillance system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video surveillance system for transmitting video, audio, monitoring and other signals using a plurality of frequency-multiplexed multi-channel transmission lines.

[0002]

2. Description of the Related Art Conventionally, there has been a monitoring and security system in which a large number of television cameras are installed in a large number of places in a high-rise building or the like, and collectively monitored by a management center. In this system, the video signal imaged by each TV camera is transmitted to each television receiver at the center via each signal line,
Further, a control signal for controlling the angle and the like of each television camera is transmitted to each terminal device in which the television camera is installed through each control signal line.

[0003]

For this reason, the number of signal lines between the terminal and the center and the number of television cameras have been increased, which has caused problems in equipment utilization and mounting. There is no way to display related monitoring points at once,
There is a problem that the efficiency of centralized monitoring is poor. Also, in a monitoring system in the event of an emergency condition such as a fire or gas leak, each ignition sensor is installed at each monitoring location, and the ignition sensor and the center are connected by signal lines, and the center is connected to the center. Only the firing position is determined by using the system, and a system that organically combines firing detection and video monitoring so that the firing location is monitored with video in conjunction with the signal output from the firing sensor is known. Not been.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a video surveillance system which has a high mounting and facility utilization efficiency and a high efficiency of centralized surveillance, and a surveillance state such as firing. It is an object of the present invention to realize a video surveillance system in which the detection of an image and the video surveillance are organically combined.

[0005]

According to a first aspect of the present invention, in a video surveillance system using a frequency multiplexing broadband transmission line, a plurality of broadband transmission lines and a plurality of
Provided broadband transmission path each receives the signals of the respective broadband transmission path, a demodulator for demodulating a video signal of the specified channel, the plurality of channels Broadband transmission
Provided for each road, the image display means and each image display for displaying in each section interface divided signals based, multiple channels into a video signal of a plurality of channels which are demodulated by a demodulator
Means for sequentially displaying demodulated carrier waves for displaying an image.
Frequency data is displayed simultaneously by the image display means
A data group column grouped into channel groups for each screen
Data storage means for classifying and storing for each system,
In frequency data stored in data storage means
For each corresponding system, each channel group in the data group
Are sequentially read out, and the channel
A center apparatus and a constant section, in each terminal of each broadband transmission path, and a transmitting terminal apparatus transmitting a video signal picked up by the imaging device to specify the channel
The image of one channel group is displayed simultaneously on the image display means
And, in time, the channel group row is scanned to
The image for the channel group is displayed repeatedly
It is characterized by .

Further, the second invention is provided in the above-mentioned system in a place where each transmitting terminal device is installed, and when urgent monitoring such as ignition, gas leak, alarm, emergency contact, etc. is required, emergency monitoring is required. An emergency signal transmission device that outputs a signal, a signal line that transmits the emergency monitoring signal output from the emergency signal transmission device to the center, and if an emergency monitoring signal is input from the signal line, specify the monitoring position. Monitoring required position specifying means,
When the emergency monitoring signal is input from the signal line, the display by the display means is sequentially stopped, and only the video signal transmitted from the terminal installed at the monitoring required position specified by the monitoring required position specifying means is stopped. And an emergency display control means for displaying on the display device.

[0007]

In this system, a plurality of frequency multiplexed broadband transmission lines are provided. A plurality of transmission terminal devices are connected to each of the broadband transmission lines. Each transmitting terminal device transmits a video signal captured at the installation location to each predetermined channel. In the center, a demodulator for extracting a video signal of an arbitrary channel of a plurality of broadband transmission lines is provided. In the demodulator, based on the frequency data of the channel group stored in the data storage unit by the channel designation unit,
Frequency data of the carrier of the demodulation channel is set. Then, the demodulator generates a carrier wave according to the set frequency data, demodulates the video signal of the channel, and displays the video signal of one group of channels on each divided screen of the display means. indicate. A group of images to be monitored are simultaneously displayed on the division screen of the display means, and the images are sequentially switched for each group and displayed on the display means. Therefore, images in many places can be monitored simultaneously for each group, which is convenient in use.

In addition, emergency signal transmitting devices for outputting an emergency monitoring signal when emergency monitoring such as ignition, gas leak, alarm, emergency notification, etc. are required are installed at each location. The output emergency monitoring signal is collected at the center, and the monitoring position is specified. Then, the video signal transmitted from the transmitting terminal transmitting device installed at the specified monitoring required position is demodulated, and only the video is fixedly displayed on the image display device. Therefore, when the emergency monitoring state is detected, it is possible to promptly check the image of the place, and thereby it is possible to check the emergency state, for example, the state of fire occurrence.

[0009]

According to the present invention, in a terminal connected to a plurality of systems of frequency multiplexed broadband transmission lines, a transmission terminal device for transmitting a video signal to each channel and each demodulator are provided on the transmission line of each system. Frequency data of a carrier of a channel to be demodulated is sequentially set in the demodulator, and each demodulated video signal output from each demodulator is displayed on each divided screen on the image plane. Another aspect of the present invention is that, in the above-described normal video monitoring, when an emergency required monitoring state is detected, a required monitoring position is specified, and transmitted from a transmitting terminal device installed at the required monitoring position. This is a system in which only video signals are fixedly displayed on display means. Therefore, it is possible to sequentially monitor images at a large number of places on a small number of display screens, and the facility utilization rate is improved. In addition, there is an effect that the state of the monitoring required position where the emergency monitoring required state occurs can be quickly confirmed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to a specific embodiment. 1. Overall system configuration

FIG. 1 is a diagram showing the overall configuration of the present system. Each monitoring location is classified by system, and coaxial cables of q systems L1 to Lq are provided. Describing the system L1, the coaxial cable 1 is connected to n transmission terminal devices E1 _{1,1 to} E1 _{j, 4} via branching devices B1 to Bn. The transmitting terminal device has four related monitoring points of 1
They are divided into groups, and are divided into j groups as a whole. The general symbol Em _{k, i} attached to the transmitting terminal is
m is a system number, k is a group number, and i is an intragroup number. Therefore, n = 4 × j. Further, a center device 2 for centralized monitoring is connected to the coaxial cable 1 via a branching device B0.

The coaxial cable 1 has (n + 1) channel ch0 to
Can transmit chn frequency-multiplexed signals. Each channel is 6 MHz so that television video signals can be transmitted
It is composed of One of the (n + 1) channels, ch0, is a control channel for transmitting operation command data from the center device 2 to each transmitting terminal device.
The channel is a video channel for transmitting a video signal from the transmitting terminal device to the center device 2. One transmitting terminal device is allocated to each of the video channels. That is, the transmission terminal devices E1 _{1,1 to} E1 _{j, 4} are assigned channels ch1 to chn, respectively, in order.

A system having the above configuration is provided in q systems, and the center device 2 is connected to the q system coaxial cable. Also, in the area monitored by each transmitting terminal device, emergency signal transmitting devices A1 _{1,1,1 to} Aq _{j, 4, r} for transmitting emergency signals such as ignition, gas leak, alarm, emergency contact, etc. are arranged. Have been. General symbol Am for emergency signal transmitter
_{For k, i, s} , m is the strain number, k is the group number, i is the group number, s
Is the number of the emergency calling device belonging to one transmitting terminal device. Therefore, the transmitting terminal device is specified by (m, k, i), and the emergency signal transmitting device in the transmitting terminal device is specified by s.

2. Configuration of Center Device As shown in FIG. 2, the center device 2 outputs command data for controlling each transmission terminal device in accordance with the operation state of the control panel 26 by an operator's operation, or outputs each transmission terminal device. TV receivers TV1 to TV based on the video signal transmitted from the device
q has a CPU 20 for controlling image controllers IP1 to IPq for displaying images. The control panel 26 is operated by an operator to remotely control each of the transmission terminal devices. The control switch 26 designates a transmission terminal device that desires to receive a video signal, a power switch of a television camera of the transmission terminal device, and a television camera. , A vertical and horizontal angle adjustment stick, an illumination switch, a zoom switch, a focus adjustment switch, and the like. The operation state of the control panel 26 is read by the CPU 20 via the input / output interface 25.

The emergency signaling device in multiple locations to monitor the video A1 _1,1,1 ~Aq _{j, 4, r} is installed. For example, about 55 emergency signal transmission devices (fire sensors, emergency call buttons, etc.) are provided for each floor of each building. The signal lines of the many emergency signal transmitting devices A1 _{1,1,1 to} Aq _{j, 4, r} are collected in the alarm receiving panel 28. From the many emergency signal transmitting devices A1 _{1,1,1 to} Aq _{j, 4, r} ,
An emergency monitoring signal is output in the event of a gas leak, operation of the emergency notification button, or the like. The emergency monitoring signal is input to the interface 25 and is read by the CPU 20.

The ROM 21 includes an operation program of the CPU 20, a terminal correspondence table defining correspondences between numbers of transmission terminal devices, system numbers, group numbers, channel numbers, and frequency data of carrier waves of channels. A monitoring correspondence table that defines a relationship between the number of each emergency monitoring signal and the number of the transmitting terminal device that displays a monitoring video when the emergency monitoring signal is received is stored. The RAM 22 stores the operation state of the control panel 26 and other control states.

A data block having address data and command data for controlling each transmitting terminal device is a CP.
U 20 via the input / output interface 24
Output to the modems M1 to Mq. The RF modems M1 to Mq modulate the carrier of the control channel ch0 of each system L1 to Lq based on the data block. Then, the modulated signal is output to the control channel ch0 of each transmission path 1 via the couplers Bc1 to Bcq of each system.

The transmission path m
Are output to the video channels ch1 to chn. The video signal is received by the demodulator DMm of the center device 2 and demodulated for each of the channels ch1 to chn.
Output to the image controller IPm. Image controller
IPm controls the TV receiver TVm to divide one screen into four sections and display four images simultaneously. The four images displayed at the same time are images captured by four transmitting terminal devices belonging to each group. The CPU 20 sets a set of carrier frequency data of each group of channels simultaneously displayed on the m-th m-type TV receiver TVm to the demodulator DMm. Then, by setting the frequency data of the carrier waves of the four channels of each group at predetermined time intervals, the T-th channel of the m-th system is set.
On the V receiver TVm, four images for each group are simultaneously switched and displayed at predetermined time intervals.

3. Configuration of Transmission Terminal Device

One transmitting terminal device E1 _{j, i} is configured as shown in FIG. The signal of the control channel ch0 of the transmission line 1 is encoded by the RF modem 41 and read by the CPU 40 via the input / output interface 42. The CPU 40 has a ROM 43 storing an operation program, an RF
A data block input from the modem 41 is stored.
The RAM 44 is connected.

The CPU 40 has an input / output interface 45.
The control signal is output to the camera control device 46 and the analog switch 47 via. The camera controller 46 turns on / off the power switch of the television camera 48, turns on / off the lights, drives the motors for vertical and horizontal angle adjustment, drives the focus adjustment motor, and the zoom motor according to the received command data. I do.

The video signal output from the television camera 48 is input to a modulator 49. The modulator 49 modulates a carrier of a predetermined channel based on the video signal and outputs the result to the analog switch 47. The analog switch 49 is normally in a signal passage blocking state. When transmission of the video signal from the transmitting terminal device is requested from the center device 2, the CPU 40 that has decoded the command data output from the center device 2 enters a signal passing state. As a result, a video signal is output from the transmission terminal device E1 _{j, i} to the channel of the transmission path 1.

4. Operation of Center Device Next, a processing procedure of system initialization by the CPU 20 of the center device 2 will be described with reference to FIG. In step 100, the address data of the transmitting terminal devices is determined in order to sequentially turn on the power of all the transmitting terminal devices in accordance with the terminal correspondence table shown in FIG. Note that the address data is the transmission terminal device number Em _{k, i}
Created by (m, k, i). Next, command data for turning on the power is generated. Next, in step 102, when transmitting command data of the transmitting terminal device Em _{k, i} , it is determined whether a CD (carrier detection) signal is output from the RF modem Mm corresponding to the m-th system. Thus, it is determined whether or not the control channel ch0 of the m-th transmission line is empty. If empty, the process proceeds to step 106, where a data block including address data and power-on command data is output to the RF modem Mm. RF
After receiving the data block and modulating the data, the modem Mm sends the data block to the channel ch0 of the m-th transmission line.

Next, in step 108, it is determined whether or not transmission to all transmitting terminal devices has been completed. If the transmission of the data to all the transmitting terminals has not been completed, the process returns to step 100, and the data is transmitted to the next transmitting terminal according to the terminal correspondence table of FIG. If the transmission of the data block to all the terminal transmitters is completed, step 110
Is executed.

In step 110, the group number k is initialized to 1. Next, in step 112, each system L1 to Lq
The four frequency data belonging to the k-th group are set to the demodulators DM1 to DMq of each system. Each of the demodulators DM1 to DMq generates four carrier waves corresponding to the four frequency data, demodulates them, and outputs a video signal to each of the image controllers IP1 to IPq. Each of the image controllers IP1 to IPq receives four video signals and receives a respective one of the TV receivers TV1 to TVq.
Divide the screen of q into four and display the image in each section.

Next, at step 114, the process waits for a predetermined video display time. As a result, the images transmitted from the four transmitting terminal devices belonging to the k-th group of the first to m-th systems are continuously supplied to the TV receivers TV1 to TVq of the respective systems for a predetermined image display time. Is displayed. next,
In step 116, it is determined whether the group number k is equal to the final group number j.
In step 118, the group number is updated by 1, and the process returns to step 112 to execute the process of displaying the next group of images. If it is determined in step 116 that the group number K is equal to the final group number j, the process returns to step 110, where the group number K is set to the initial value 1, and the image display processing is repeatedly performed. Thereby, each TV receiver TV1 to TV of each system
As for q, four images are regarded as one group, and the images of the group are sequentially and repeatedly displayed at predetermined time intervals. The observer can monitor all the places where the terminal transmitting devices are installed by monitoring the images of the TV receivers TV1 to TVq.

On the other hand, when it is desired to specify a certain transmission terminal device and change the imaging angle, magnification, and the like of the television camera, the processing procedure of FIG. 5 is executed. The processing procedure of FIG.
When the adjustment switch of the control panel 26 is operated, the control panel 26 is activated by an interrupt to the program shown in FIG.
In step 200, the number of the transmitting terminal device to be remotely operated and the status of each switch for remote operation set in the control panel 26 are read. Next, step 202
In, the address data for specifying the transmitting terminal device is created from the designated transmitting terminal device number and the terminal correspondence table in FIG. In the control panel 26, the power switch of the TV camera 48 of the transmitting terminal device is turned on / off, the vertical and horizontal angle adjustment sticks of the TV camera are operated, the illumination switch is turned on / off, the zoom switch is turned on / off, and the focus adjustment switch is turned on. Command data whose corresponding bit is "1" or "0" is created corresponding to the on / off state.

Next, in step 204, it is determined whether or not a CD (carrier detection) signal is being output from the RF modem of the designated system to determine whether or not the control channel ch0 of that system is empty. Is determined. If it is empty, the process proceeds to step 206, where a data block composed of address data and command data is output to the RF modem corresponding to the system number to which the specified transmitting terminal device belongs.
The RF modem modulates upon input of the data block, and then transmits the data block to channel ch0 of the transmission line of the specified system.

Next, the process proceeds to step 208, where the frequency data of the channel to which the designated transmitting terminal device belongs is set in the demodulator DMm of the corresponding system, and the image controller IPm
Is set with control data for full-screen display. As a result, the image transmitted from the designated transmitting terminal device is displayed on the full screen on the TV receiver TVm of the corresponding system. The program in FIG. 5 is repeatedly executed while the adjustment switch of the control panel 26 is on. Therefore, while the adjustment switch of the control panel 26 is on, the user can remotely operate the television camera by operating various switches and operation sticks of the control panel 26 while checking the image transmitted from the television camera. The image transmitted by the TV camera can be adjusted.

On the other hand, the CPU 20 executes the program shown in FIG. 6 at a predetermined time interval at the highest priority level. In step 300, the input signal levels from all emergency signal transmitters are read. In the next step 302, it is determined whether or not there is a signal level of L level (urgent monitoring signal). The emergency signal transmitting device transmits an H-level signal, and outputs an L-level emergency monitoring signal when an emergency occurs. If no emergency monitoring signal is detected, the program is immediately terminated.

If the emergency monitoring signal is detected, the monitoring correspondence table shown in FIG. 6 stored in the ROM 21 is searched in step 304, and the emergency signal transmission transmitting the emergency monitoring signal is performed. The transmission terminal device number Em _{k, i} corresponding to the device number Am _{k, i, s} is specified. Next, step 306
In, the terminal correspondence table shown in FIG. 3 is searched from the specified transmission terminal device number Em _{k, i} to determine frequency data. The frequency data is obtained in step 308.
The frequency data is set in the demodulator of the corresponding system,
A full screen display command and a channel fixing command are set in the image controller. As a result, the T
An image of the place where the emergency signal transmitting device that is emitting the emergency monitoring signal is installed is displayed on the entire screen of the V receiver. In this case, even if the program of FIG.
The image receiver is configured so that the channel of the image to be displayed does not change. In this state, the control panel 26 is operated to
By starting the program, the angle, magnification, and the like of the television camera of the designated transmitting terminal device Em _{k, i} can be changed, and the observer can recognize more detailed video.

5. Operation of Transmission Terminal Device Next, a processing procedure of the CPU 40 of the terminal device Em _{k, i} will be described with reference to FIG. The RF modem 41 encodes a signal of the control channel ch0, and this program is started when a CD signal is output from the RF modem 41. In step 400, the data block encoded by the RF modem 41 is input. Next, in step 402, the address data of the data block is decoded. Next, at step 406, it is determined whether or not the address data matches the address assigned to the own terminal device. If it matches the self address, the command data following the address data is decoded in step 406.

In step 408, the command signal for turning on / off the power of the television camera 48, the vertical signal of the television camera 48, and the command signal according to the "1" or "0" state of each bit of the received command data. A command signal for rotating / stopping the horizontal angle adjustment motor, a command signal for turning on / off the illumination, a command signal for rotating / stopping the zoom motor, and a command signal for rotating / stopping the focus adjustment motor are output to the camera controller 46. . The camera controller 46 inputs the command signal, turns on and off the power of the television camera 48, rotates or stops the vertical and horizontal angle adjustment motors of the television camera 48, turns on and off the lights, and rotates or rotates the zoom motor. Then, the motor for focus adjustment is rotated or stopped.

Next, the routine proceeds to step 410, where the analog switch 47 is set to a signal passing state or a signal passing preventing state according to the command data. This transmitting terminal device Em _{k, i}
Is transmitted from the center device 2, the analog switch 47 enters a signal passing state, and the television camera 48 modulated by the modulation circuit 49
Is output to the transmission path 1 as a channel chp signal. Thus, the center apparatus 2, transmitting terminal device Em _{k specified,} it is possible to display the image captured by the _i, it is possible to monitor the surrounding environment by the transmission terminal apparatus Em _{k, i.}

If it is determined in step 404 that the address data of the received data block is not its own address, the program is terminated without performing the following processing.

Also, a video signal of four combined screens is transmitted from the center device 2 to a transmission line of each system using a predetermined channel, and a plurality of sub-centers capable of monitoring the video are connected to each system. Is also good. At this time, the sub-center may also be able to control the attitude, magnification, and the like of the television camera of each transmitting terminal device.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an overall configuration of a system according to a specific embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a center device in the embodiment.

FIG. 3 is a flowchart showing a main processing procedure of a CPU of the center device.

FIG. 4 is an explanatory diagram showing a terminal correspondence table stored in a ROM of the center device.

FIG. 5 is a flowchart showing a processing procedure of remote control of the television camera of the transmission terminal device by the CPU of the center device.

FIG. 6 is a flowchart showing an emergency display control procedure when an emergency monitoring signal is input by the CPU of the center device.

FIG. 7 is an explanatory diagram showing a monitoring correspondence table stored in a ROM of the center device.

FIG. 8 is a flowchart showing a processing procedure of a CPU of the transmitting terminal device.

[Explanation of symbols]

1: Transmission line 2: Center device E1 _1,1 -Em _{k, i} -Eq _{j, 4} ... Transmission terminal device A1 _1,1,1 -Amk _{, i, s} -Am _{j, 4, r} ... Emergency signal transmission Devices TV1 to TVm to TVq TV receiver (image display means) IP1 to IPm to IPq Image controller (image display means) 20 CPU (channel designation means) 21 ROM (data storage means) Steps 112 to 118 channels Designating means Steps 300 to 304 ... Monitoring required position specifying means Steps 306 and 308 ... Emergency display control means

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000004226 Nippon Telegraph and Telephone Corporation 3-19-2 Nishi Shinjuku, Shinjuku-ku, Tokyo (73) Patent holder 000143400 Takamisawa Electric Works, Ltd. Higashi-Gotanda, Shinagawa-ku, Tokyo 3-5-5 (72) Inventor Shinzo Mizuno 5-37-8 Shiba, Minato-ku, Tokyo Hibiya Sogo Equipment Co., Ltd. (72) Inventor Togoro Abe 2-24-18 Chiyoda, Naka-ku, Nagoya-shi, Aichi Prefecture No. Aichi Electronics Co., Ltd. (72) Inventor Yoshinori Kano 5--12, Yasujicho, Minami-ku, Nagoya-shi, Aichi 18-18 Inside Cast Co., Ltd. (72) Inventor Kunio Suzuki 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Japan Inside Telegraph and Telephone Corporation (72) Inventor Souichi Hashiba 3--18-7 Kamima, Setagaya-ku, Tokyo Inside Takamizawa Electric Works, Ltd. (56) References Open flat 2-108397 (JP, A) JP flat 4-61491 (JP, A) JP flat 3-284088 (JP, A) (58 ) investigated the field (Int.Cl. ^6, DB name) H04N 7 / 18

Claims (2)

(57) [Claims] 1. A video surveillance system using a frequency multiplex broadband transmission path, and broadband transmission path of a plurality of systems, provided broadband transmission path for each of said plurality of systems, receives signals of the respective broadband transmission path, A demodulator that demodulates a video signal of a designated channel, and a demodulator that is provided for each of the plurality of broadband transmission lines and that divides a signal of a plurality of channels based on a video signal of the plurality of channels demodulated by the demodulator. Image display means for displaying on the divided screen, and image display means for sequentially displaying images by the image display means.
The frequency data of the demodulated carrier is calculated by the image display means.
Grouped into channels for each of multiple screens displayed simultaneously
Data grouped into data groups and classified and stored for each system.
Data storage means and frequency data stored in the data storage means.
From each channel of the data group row to the corresponding system
The groups are sequentially read out and the channels to be set in each of the demodulators are read out.
And a transmission terminal device for transmitting a video signal imaged by an imaging device to a specified channel at each terminal of each of the broadband transmission lines, and the image display device has one channel. Group images are displayed simultaneously
And, in time, the channel group row is scanned to
The image for the channel group is displayed repeatedly
A video surveillance system characterized by the following . 2. The video surveillance system according to claim 1, wherein said video surveillance system is installed at a place where each of said transmission terminal devices is installed, and is urgently required when emergency monitoring such as ignition, gas leak, alarm, emergency communication, etc. is required. An emergency signal transmitting device that outputs a monitoring required signal, a signal line that transmits the emergency monitoring signal output from the emergency signal transmitting device to the center, and the emergency monitoring signal is input from the signal line. Is a monitoring required position specifying means for specifying a monitoring required position, and when the emergency required monitoring signal is input from the signal line, sequentially stops displaying by the display means, and the monitoring required position specifying means Emergency display control means for displaying only a video signal transmitted from a terminal installed at the specified monitoring required position on a display device, is further provided.