KR101681844B1 - Method for conversion to high definition cctv system for metropolitan railway - Google Patents

Method for conversion to high definition cctv system for metropolitan railway Download PDF

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Publication number
KR101681844B1
KR101681844B1 KR1020150133979A KR20150133979A KR101681844B1 KR 101681844 B1 KR101681844 B1 KR 101681844B1 KR 1020150133979 A KR1020150133979 A KR 1020150133979A KR 20150133979 A KR20150133979 A KR 20150133979A KR 101681844 B1 KR101681844 B1 KR 101681844B1
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KR
South Korea
Prior art keywords
image
coaxial coaxial
video
cctv
operating system
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KR1020150133979A
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Korean (ko)
Inventor
김상석
변철구
김영민
Original Assignee
대구도시철도공사
주식회사 대명코퍼레이션
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Priority to KR1020150133979A priority Critical patent/KR101681844B1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/30—Transportation; Communications
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level

Abstract

The present invention relates to a method for converting a high-definition CCTV operation system for an urban railway. The high-definition CCTV system includes: a central control device (110) installed in a station office (101) of a station or a driving controller (102) to control entire CCTV operation system; an HD camera (120) installed in a plurality of locations inside the station to take an HD image; an HD image storage device (130, 130) installed in the station office (101) of the station or the driving controller (102) to store the taken HD image; an optical transmitter (140) for transmitting the HD image taken by the HD camera (120) to the driving controller (102); an optical receiver (150) for receiving the transmitted HD image by the driving controller (102); an HD image distribution device (170) connected to the HD camera (120), the central control device (110), the HD image storage device (130), an HD monitor (160) installed at a platform, and the optical transmitter (140), for distributing the HD image taken by the HD camera (120); and a central monitoring device (180) installed at the driving controller (102) to output the HD image received through the optical receiver (150). A coaxial cable or an optical cable (210) connects the devices, so that an existing low-definition CCTV operation system is converted into the high-definition CCTV operation system (100) based on equipment of the coaxial cable or the optical cable (210) used in the existing low-definition CCTV operation system without additional piping and wiring, and without replacement and additional installation of control software.

Description

{METHOD FOR CONVERSION TO HIGH DEFINITION CCTV SYSTEM FOR METROPOLITAN RAILWAY}

The present invention relates to a high-definition CCTV operating system conversion method for an urban railway, and more particularly, to a high-definition CCTV operating system without additional expansion of piping, wiring, and control software used in a conventional low- The present invention relates to a method of switching a high-definition CCTV operating system for an urban railway, which is capable of capturing, transmitting, monitoring, and storing a high-definition HD video in real time.

Generally, in each station of the city railway, a large number of image capture cameras are installed to secure the safety of users and to operate an efficient urban railway, and they are monitored through a CCTV operating system.

Closed circuit television (CCTV) is a system that transmits video data taken by a specific facility to a specific manager and is called a closed circuit system. It is mainly used for surveillance and security purpose but it is used for various purposes such as education, industry, medical care, traffic control, disaster prevention, and crime prevention.

The CCTV operating system can be classified into three types according to the technical characteristics including the image quality of the image, and the description will be made with reference to the description outlined in Table 1 below.

division SD-CCTV IP-CCTV HD-CCTV Signal type analog digital digital Transmission medium Coaxial cable UTP Coaxial cable Maximum Resolution 41 million pixels 2.1 million pixels 2.1 million pixels Video delay none has exist none Whether the image is compressed Uncompressed compression Uncompressed Video storage device DVR NVR HD-SDI DVR

SD (standard definition) -CCTV is a CCTV operating system that captures, transmits, and stores video at a standard quality of 1/3 of HD quality. It has improved image quality compared to the conventional analog system used in the past, but has a resolution of about 640x480 Therefore, the quality of the image is not clear to the naked eye. Recently, it is recommended to use it only for simple recording.

IP (internet protocol) -CCTV is a technology using Internet protocol. It is a CCTV operating system developed to transmit captured images through internet and store them in NVR (network video recorder). However, there is a disadvantage that it is not suitable for real - time monitoring due to the occurrence of image delay due to excessive traffic when transmitting high - quality video.

HD (high definition) -CCTV is a CCTV operating system that captures images with high definition HD image quality. It can capture 1920x1080 resolution images with 2 million pixels in case of full-HD quality images. It is transmitted through coaxial cable or optical cable, It is suitable for real-time surveillance purposes.

As described above, SD-CCTV is provided with low-quality images, which makes it difficult to accurately identify the objects to be shot. IP-CCTV has improved image quality compared to SD-CCTV, but real- And it is not suitable for practical use. Thus, there is a limitation in the use range.

However, since most of the CCTV operating systems applied to the current railroad history are mainly composed of the above-mentioned SD-CCTV, it is urgent to switch to the HD-CCTV operating system most suitable for the current technology level.

Korean Patent No. 10 - 1195721 - 0000

Since the CCTV operating system for the current urban railway, to which the SD-CCTV operating system is applied, has difficulty in identifying the object to be photographed on the screen because the image quality of the photographed image is low, There is a serious problem such as not being useless because it can not exert its function when it occurs.

In addition, some of the devices that constitute the existing SD-CCTV operating system depend on overseas imports, and even in the crisis of discontinuance due to discontinuation of development, various troubles and problems are more likely to occur in terms of maintenance of the apparatus .

Therefore, it is indispensable to switch to high-definition, high-speed HD-CCTV operating system in urban railway according to the recent advanced technology level.

However, as can be seen from Table 1, SD-CCTV and HD-CCTV have different technical features and can not be solely solved by simply improving the image quality of a camera for photographing. As a result, expansion or replacement of piping, wiring and control software Changes are required throughout the operating system, and long-term conversion and large-scale cost are expected.

Accordingly, the present invention has been made to solve the above-mentioned problems,

A central control unit 110 installed in the station room 101 or the driving control unit 102 to control the entire CCTV operating system,

An HD camera 120 installed at a plurality of locations in history to capture an HD image,

An HD video storage device 130 or 130 'installed in the station room 101 or the driving controller 102 of the history to store the photographed HD video,

An optical transmitter 140 for transmitting the HD image taken by the HD camera 120 to the driving controller 102 and an optical receiver 150 for receiving the transmitted HD image in the driving controller 102,

The HD camera 120 is connected to the HD camera 120, the central control unit 110, the HD video storage unit 130, the HD monitor 160 installed in the platform, and the optical transmitter 140, An HD image distribution apparatus 170 for distributing the HD image,

And a central monitoring unit (180) installed in the driving control unit (102) and outputting the HD image transmitted through the optical receiver (150)

The devices are connected to each other by a coaxial cable or an optical cable 210,

(CCTV) system 100 based on the coaxial cable or optical cable 210 used in the existing low-quality CCTV operating system, while minimizing the replacement and extension of additional piping, wiring and control software. It is possible.

The present invention improves the limitations of the low-quality CCTV operating system that has been applied to the conventional urban railway, such as the low image quality of the photographed image and the low functionality of the photographed object due to the low resolution, Storage, and monitoring.

Especially, by utilizing piping, wiring and control software used in existing low-quality CCTV operating system, it is possible to switch to high-definition CCTV operating system while minimizing additional replacement and expansion, It can be expected to bring about economic benefits such as cost reduction.

In addition, another advantage of the present invention can be expected that it relieves the problem that it has been difficult to depend on the import of some devices and maintenance due to discontinuation of development of the old model.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a method for switching a high-definition CCTV operating system for an urban railway according to an embodiment of the present invention.
FIG. 2 to FIG. 3 are diagrams illustrating application examples of an embodiment of a method for switching a high-definition CCTV operating system for an urban railway according to the present invention.
FIGS. 4 to 5 are views illustrating a comparison of HD image quality according to an exemplary embodiment of a conventional CCTV operating system and a method of switching a high-definition CCTV operating system for an urban railway according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure and operation of a method for switching a high-definition CCTV operating system for an urban railway according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an embodiment of a method for switching a high-definition CCTV operating system for an urban railway according to the present invention. FIGS. 2 to 3 are examples of application examples of a method for switching a high- And FIGS. 4 to 5 illustrate comparative examples of an HD image quality according to an embodiment of a conventional CCTV operating system SD image quality and a method of switching a high-definition CCTV operating system for an urban railway according to the present invention.

The CCTV operating system switching method for an urban railway to which the technology of the present invention is applied can efficiently utilize the facilities used in the existing low quality CCTV operating system to efficiently convert the CCTV operating system 100 into a high quality CCTV operating system 100, , Transmission, monitoring, and storage can be performed in real time, and it is a technology related to shortening the conversion period and reducing the cost, thereby achieving economic gain.

To this end, a method for switching a high-definition CCTV operating system for an urban railway of the present invention includes a central control unit 110 installed in a stationhouse 101 or a driving control unit 102 of a history 101 to control the entire CCTV operating system, An HD camera 120 installed in a plurality of locations and capturing an HD image, an HD image storage device 130 or 130 'installed in a stationhouse 101 or a driving controller 102 of the history 101 to store an HD image photographed, An optical transmitter 140 for transmitting the HD image taken by the camera 120 to the driving controller 102 and an optical receiver 150 for receiving the transmitted HD image at the driving controller 102, The central control unit 110, the HD video storage unit 130, the HD monitor 160 installed on the platform, and the optical transmitter 140, so that the HD video distribution unit distributes the HD video shot by the HD camera 120 An apparatus 170, a central monitoring apparatus installed in the driving controller 102 and outputting the HD image transmitted through the optical receiver 150 180)

The coaxial cable or the optical cable 210 is connected between the devices to minimize the replacement and extension of additional piping, wiring and control software based on the coaxial cable or optical cable 210 used in the existing low-definition CCTV operating system To the high-definition CCTV operating system (100).

The central control unit 110 is equipped with control software for the control system (VTS), and controls the overall operation of the metro train. Generally, it is installed in the office room or the driving control unit (102) in each history (101) to integrally manage the operation status of the city railroad. In the present invention, the same model as that used in the existing low-quality CCTV operating system can be used for the control software, so that no replacement and data type conversion are required.

The HD camera 120 is installed in a plurality of places such as a landing platform and a waiting room in the history 101, and photographs a scene. The HD camera 120 uses a fixed type, a dome type, a speed dome type, and the like in a proper place according to the operation mode.

It is preferable that the HD camera 120 selects a specification supporting 1080p30, which is retrospective with a maximum resolution of 210 m, so that super-high-quality images can be captured. The 1080p30 is capable of shooting Full HD video at 1080p at 30 frames per second.

The HD video storage devices 130 and 130 'installed in the station room 101 or the driving controller 102 of the history 101 are digital HD video storage devices (HD-SDI DVRs) It has advanced in the technology of storing images.

The HD video storage devices 130 and 130 'are preferably selected to support specifications of 1080p240 and 8ch as HD-SDI (HD-Serial digital interface, technology for digitally transmitting HD video through a coaxial cable in a non-compression manner) Do. Therefore, the problems such as deterioration of the image quality of the stored HD image after the shooting are excluded.

In addition, the HD video storage device 130 supplies power to the HD camera 120, the optical transmitter 140, and the optical receiver 150 through the coaxial cable 210 used in the existing low-definition CCTV operating system, The PoC / CoC function that enables data transmission is built-in, and the HD video is received and stored.

The PoC (power over coax) / CoC (control over coax) is a technology enabling a single cable solution. The HD video storage devices 130 and 130 'are connected to the HD camera 120 through the coaxial cable 210, The optical transmitter 140, and the optical receiver 150, or may transmit a camera control signal, thereby eliminating a separate additional line extinguishing operation.

The transmitter 140 and the reciever 150 are connected to the optical signal distributing unit 170 and the driving controller 102 through an optical cable for connecting the optical communication network to an electric signal ↔ And is a device that is responsible for converting optical signals.

The optical cable is lighter and thinner than the coaxial cable, occupies a smaller space, and has a bandwidth wider. The transmission speed is theoretically made at the speed of light. Since the transmission error is very small, the HD video data between the optical transmitter 140 and the optical receiver 150 Thereby ensuring high reliability in the transmission operation and enabling transmission of a high-quality image.

In the present invention, in order to utilize the coaxial cable or the optical cable 210 used in the existing low quality CCTV operating system as much as possible, it is required to use the optical cable for transmitting the HD video data between the history 101 and the driving controller 102, So that an efficient high-quality CCTV operating system 100 can be constructed while preventing degradation.

The HD image distribution device (HD MATRIX) 170 is a distribution device that transfers images input from the HD camera 120 to respective devices. In the existing low quality CCTV operating system, the analog video distribution system was used, but in the case of the domestic system, the technical development was discontinued, and some devices are dependent on the import.

The HD image distributing apparatus 170 employed in the present invention has an advantage of maximizing the degree of technology independence by replacing a domestic apparatus having a specification for supporting up to 64 channels of input and output in the HD-SDI system.

Therefore, the HD camera 120 is connected to the HD control unit 110, the HD video storage unit 130, the HD monitor 160 installed in the platform, and the optical transmitter 140 using the HD image distribution apparatus 170 The HD video data is distributed and transmitted through the input / output.

The central monitoring apparatus 180 outputs an HD image and performs integrated monitoring in the operation control unit. It is preferable to use a Full HD monitor supporting 1080p so that HD images can be monitored with high image quality to precisely identify the subject to be photographed.

1, the present invention can be connected and set up using the coaxial cable or the optical cable 210 used in the existing low-quality CCTV operating system, as shown in FIG. 1, so that additional piping and wiring It is possible to switch to the high-definition CCTV operating system 100 more efficiently.

An operation process of the high-definition CCTV operating system 100 from shooting to transmission, monitoring, and storage of HD video according to the switching method of high-definition CCTV operating system for an urban railway of the present invention having the above-described configuration will be described below.

First, the HD camera 120 installed in a plurality of locations in the history 101 receives power from the HD image storage device 130, captures HD images in various places in the history 101, and transmits the HD images to the HD image distribution device 170 A transmitting step is performed.

Power supply from the HD video storage device 130 and transmission of HD video data are performed through a coaxial cable 210 that has been used in the past, and this can be performed by a PoC / CoC function built in the HD video storage device itself.

The HD image distribution apparatus 170 receives the HD image and distributes the HD image to the HD 110 and the HD monitor 160 and the optical transmitter 140 in real time .

Since the optical transmitter 140 receives power from the HD video storage device 130 through the coaxial cable 210, it is possible to completely eliminate additional power supply wiring and the like.

The central control unit 110 and the HD video storage unit 130 control and store the received HD video data and the HD monitor 160 installed on the platform outputs the HD video and the optical transmitter 140 transmits the HD video A step of transmitting data to the optical receiver 150 of the driving control 102 is performed.

The optical receiver 150 receives HD video data in real time and transmits the HD video data to the central monitoring device 180 and the HD video storage device 130 'to output and store the HD video.

The connection between the optical transmitter 140 and the optical receiver 150 is established by using an optical cable to minimize the loss of the HD video data and to achieve the high-speed transmission, thereby eliminating the problems of the existing low-quality CCTV operating system such as image quality degradation and image delay. do.

The high-quality CCTV operating system 100 can be implemented in which the shooting, transmission, monitoring, and storage of HD images can be performed in real time through the above-described process.

Ultimately, the method for switching the high-definition CCTV operating system for an urban railway according to the present invention as described above is to utilize the piping, wiring, and control software used in the existing low-quality CCTV operating system, 100), it is advantageous in terms of economical advantages such as cost reduction and shortening of air.

In addition, various effects such as reliance on the import of some devices or the problem of difficult maintenance due to discontinuation due to discontinuation of development of the old model can be expected.

100: High-definition CCTV operating system
101: Urban Railway Station
102: Driving control
110: Central control device
120: HD camera
130,130 ': HD video storage device
140: optical transmitter
150: Optical receiver
160: platform HD monitor
170: HD image distribution device
180: Central monitoring device
210: Coaxial cable

Claims (3)

The HD camera 120 installed in a plurality of places in the history 101 receives power from the HD video storage device 130 installed in the office room or the driving controller 102 and photographs all parts of the history as HD images;
Transmitting the HD image captured by the HD camera 120 to the HD image distribution apparatus 170;
The HD image distributing apparatus 170 includes a central control unit 110 installed in a stationhouse 101 or a driving control unit 102 of the history 101 for controlling the entire CCTV operating system and an HD image storage apparatus 130 installed in a stationhouse, An HD monitor 160 installed at the platform, and an optical transmitter 140 for real-time distribution and transmission of the HD image;
The central control unit 110 and the HD video storage unit 130 control and store the HD video data transmitted from the HD video distribution unit 170 and output the HD video to the platform through the HD monitor 160 ;
Transmitting the HD video data received from the HD video distribution apparatus 170 to the optical receiver 150 of the driving control unit 102 in real time by the optical transmitter 140;
The optical receiver 150 transmits the HD image data received from the optical transmitter 140 to the central monitoring device 180 and the HD image storage device 130 'installed in the operation controller to output and store the HD image ;
In the above steps, the connection between the devices is performed based on the coaxial cable or optical cable 210 used in the existing low-definition CCTV operating system, and the HD video storage devices 130 and 130 'are used in the existing low- (Power over coax) / control over coax (CoC) / CoC (coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial coaxial cable) ) Function is built in, so that the shooting, transmission, monitoring, and storage of the HD image can be performed in real time while minimizing the replacement and extension of additional piping, wiring, and control software. How to switch operating systems. delete delete
KR1020150133979A 2015-09-22 2015-09-22 Method for conversion to high definition cctv system for metropolitan railway KR101681844B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200085493A (en) * 2019-01-07 2020-07-15 주식회사 피에스아이노딕 System for compositely transmitting power and control signal using image signal line in CCTV(Closed Circuit Television)
KR102637629B1 (en) 2023-06-22 2024-02-16 (주)고려티에스아이 Railway signal facility management system using closed CCTV

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050019279A (en) * 2003-08-18 2005-03-03 김종무 Method for automatically detecting and alarming unexpected accident while boarding or alighting from subway and train at platform
KR101195703B1 (en) * 2012-03-08 2012-10-29 (주)가디엘 Monitoring system using ip camera having a functiom of translation
KR101195721B1 (en) 2009-05-21 2012-10-29 (주)소명 CCTV system for railroad vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050019279A (en) * 2003-08-18 2005-03-03 김종무 Method for automatically detecting and alarming unexpected accident while boarding or alighting from subway and train at platform
KR101195721B1 (en) 2009-05-21 2012-10-29 (주)소명 CCTV system for railroad vehicle
KR101195703B1 (en) * 2012-03-08 2012-10-29 (주)가디엘 Monitoring system using ip camera having a functiom of translation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200085493A (en) * 2019-01-07 2020-07-15 주식회사 피에스아이노딕 System for compositely transmitting power and control signal using image signal line in CCTV(Closed Circuit Television)
KR102185201B1 (en) 2019-01-07 2020-12-01 주식회사 피에스아이노딕 System for compositely transmitting power and control signal using image signal line in CCTV(Closed Circuit Television)
KR102637629B1 (en) 2023-06-22 2024-02-16 (주)고려티에스아이 Railway signal facility management system using closed CCTV

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