CN103533310A - High-definition digital video monitoring system based on fiber-optic network and monitoring method - Google Patents
High-definition digital video monitoring system based on fiber-optic network and monitoring method Download PDFInfo
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Abstract
The invention discloses a high-definition digital video monitoring system based on a fiber-optic network and a monitoring method. The high-definition digital video monitoring system comprises an optical access subsystem, a decoding subsystem, a high-speed switching subsystem and output system, front-end cameras are connected with the optical access subsystem through an optical fibers, the input end of the decoding subsystem is connected with the first output end of the optical access subsystem, the output end of the decoding subsystem is connected with the first input end of the high-speed switching subsystem, the second output end of the optical access subsystem is connected with the second input end of the high-speed switching subsystem, the output end of the high-speed switching subsystem is connected with the output system, and EPON cameras, optical fiber self-healing ring network cameras or optical fiber HD-SDI (High Definition-Serial Digital Interface) cameras are adopted as the front-end cameras. The cameras are directly connected with a 'VAR3S digital video comprehensive management platform' (hereinafter referred to as VAR3S) through optical fibers, and the VAR3S carries out unified decoding, real-time display and network uploading.
Description
Technical field
The present invention relates to the optical fiber data transferring technology of data communication field and the camcorder technology of field of video monitoring, more particularly to high-definition digital video supervising device and monitoring method based on fiber optic network.
Background technology
With continuing to develop for broadband services, existing Metropolitan Area Network (MAN), the off-capacity of access network.For operator, most basic and actually active method is to Metropolitan Area Network (MAN) and access network dilatation.
Fiber optic network has obviously advantage in this respect：
(1) capacity is big：Fiber work frequency is higher by the 8--9 order of magnitude than the working frequency that current cable is used, therefore the capacity developed is big；
(2) decay small：The maximum every kilometer of decay of communication coaxial cable of the current capacity of every kilometer of attenuation ratio of optical fiber is wanted more than order of magnitude lower；
(3) body is light in a small amount：Be conducive to constructing and transport；
(4) anti-tampering performance is good：Optical fiber is not disturbed by forceful electric power, electric signal interference and thunder and lightning are disturbed, and electromagnetic pulse-resisting ability is also very strong, good confidentiality；
(5) non-ferrous metal is saved：General communication cable will consume the non-ferrous metals such as substantial amounts of copper, lead or aluminium.Optical fiber is nonmetallic in itself, and the development of fiber optic communication will save a large amount of non-ferrous metals for country.
(6) dilatation is convenient：The a width of 2Mbps of one band standard fiber special line is easy for that 4M, 10M, 20M, 100M even G bandwidth can be upgraded to.
(7) up-downgoing is symmetrical：Fiber medium be different from the Telephone Cable medium of traditional adsl it is descending big up small the drawbacks of, can realize that up-downgoing is symmetrical.
Therefore it is imperative thing to escalate into fiber optic network on a large scale to existing network.Video surveillance network will also certainly will change as a kind of application mode of network.If still using traditional interface, to be constantly increasing the interconnecting device of centre so that whole system increasingly bulky complex, be unfavorable for the transmission of image and final quality.Chinese patent ZL200720106007.7 discloses digital video integrated multi-service transmission switching platform, and it can not support high definition without compression, clog-free real-time Transmission；The clear Mixed design of absolute altitude can not be supported, does not support that IPC accesses and can not realized self topological networking of equipment.
The content of the invention
For solving drawbacks described above, the present invention proposes high-definition digital video supervising device and monitoring method based on fiber optic network, the system instead of numerous equipment such as traditional optical transmitter and receiver+video distributor+analog matrix+codec+video synthesis management software+optical transmitter and receiver webmastering software, system is simplified, the performance indications of system and the maintainability of system are enhanced.
In order to solve the above-mentioned technical problem, technical scheme is as follows：
High-definition digital video supervising device based on fiber optic network, including soft exchange subsystem, decoding sub-system, high speed switching subsystem and output system, front end video camera connects soft exchange subsystem by optical fiber, the input of the decoding sub-system connects the first output end of soft exchange subsystem, the output end of decoding sub-system connects the first input end of high speed switching subsystem, second output end of the soft exchange subsystem connects the second input of high speed switching subsystem, and the high speed switching subsystem output end connects output system.
Further, the output system includes large-size screen monitors control system and Networking subsystems, the large-size screen monitors control system is is directly displayed vision signal, and the Networking subsystems are used for the input for concatenating the soft exchange subsystem of another high-definition digital video supervising device based on fiber optic network.
Further, the soft exchange subsystem includes IPC access cards, SFP light of the IPC access cards provided with 16 passages is inputted, the IPC access cards are provided with FPGA, the FPGA realizes the parsing of the SFP light input to 16 passages, sdi signal is transmitted to high speed switching subsystem if to be resolved to sdi signal, is such as IPC signals, then it is pooled into 1 road gigabit networking by RM II interface chips exports.
Further, the video monitoring apparatus is additionally provided with id information, and the id information includes the identification information of the video monitoring apparatus equipment, when the video monitoring apparatus, which is concatenated, networks, and using the id information build the equipment topology of video monitoring system.
High-definition digital video monitoring method based on fiber optic network, comprises the following steps：
When preposition video camera is IP+SDI video cameras, the sensor of video camera collects video data, image procossing is done to the video data by built-in FPGA, then IP coding modules are given by H.264 coding module, so as to export 100,000,000 network datas, the data return to FPGA, it is encoded together with sdi signal inside FPGA, video monitoring apparatus is received after data, data are parsed by FPGA, the SDI data parsed directly go high speed switching subsystem to exchange and the logical SDI outputs of ring, the H.264IP data parsed are then decoded using decoding sub-system, then enter the exchange of high speed switching subsystem and be output to a RJ45 gigabit mouthful.
High-definition digital video monitoring method based on fiber optic network, comprises the following steps：When preposition video camera is IP video cameras, the sensor of video camera is collected after video data, image procossing is done to data by FPGA, then IP coding modules are given by H.264 coding module, so as to export 100,000,000 network datas, video monitoring apparatus receive data post-reception to ip network number according to after, pass through decoding sub-system decoded ip, simultaneously can logical 100,000,000 output all the way of ring, then unpacked data is turned into by H.264 decoder module, makees to send after relevant treatment to high speed switching subsystem finally by FPGA and do exchange and the logical SDI outputs of ring.
High-definition digital video monitoring method based on fiber optic network, comprises the following steps：When preposition video camera is SDI video cameras, the sensor of video camera is collected after video data, image procossing is done to data by FPGA, then SDI coding modules directly are given by parallel data and produces SDI serial datas, after video monitoring apparatus receives SDI data, SDI decoder modules are given, then makees to send after relevant treatment to high speed switching subsystem by FPGA and does exchange and the logical SDI outputs of ring.
The beneficial effects of the present invention are：Front-end camera uses EPON video cameras, optical fiber self-healing looped network camera and optical fiber HD-SDI video cameras.Video camera is directly connected to " VAR3S digital videos comprehensive management platform " by optical fiber（Hereinafter referred to as VAR3S）, by VAR3S carry out it is unified decode, upper wall and networking in real time is uploaded.The access way of video camera is optional, can be point-to-point access, cascade access, looped network access, the access of arbitrary topological structure：Such as star topology.The device integrates high-definition digital video optical fiber transmission network and high-definition digital video matrix functions, integrates digital non-compression video and digital compressed video；Both high definition, the demand of high realtime graphic had been met, digitlization storage, IP network transmission requirement are met again；Meet the intelligent acess pattern of point-to-point/cascade/self-healing looped network；Both the access of SD video had been met, the access of 720P/1080I/1080P HD videos is met again；Both compressed encoding can be concentrated with branch center/center with front end compressed encoding again.
Modular Structure Design is used inside the device, is divided into（1）Soft exchange subsystem：Possess point-to-point access, cascade access, looped network access, the various optical access ports of arbitrary topology access；（2）Encoding and decoding subsystem：The signal for being compressed coding is decoded, switching subsystem is entered back into and exchanges upper wall；（3）Switching subsystem：Complete the real-time exchange of high-speed data；（4）System control cpu：All subsystems in control system；（5）Large-size screen monitors control subsystem：The switching of picture signal that controls to come out from switching subsystem, upper wall；（6）Networking subsystems：Networking uploading module of the branch center with upper level Surveillance center is monitored, picture signal is uploaded to Surveillance center.
Brief description of the drawings
Fig. 1 is the system structure diagram of the high-definition digital screen supervising device of the invention based on fiber optic network;
Fig. 2 is the practical application figure of the high-definition digital screen supervising device of the invention based on fiber optic network;
Fig. 3 concatenates connection figure for high-definition digital screen supervising device of the present invention based on fiber optic network;
Fig. 4 is front end when being IP signals, the internal process figure of the high-definition digital screen supervising device based on fiber optic network;
Fig. 5 is front end when being sdi signal, the internal process figure of the high-definition digital screen supervising device based on fiber optic network;
Fig. 6 is front end when being IP+SDI signals, the internal process figure of the high-definition digital screen supervising device based on fiber optic network.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
The high-definition digital video supervising device based on fiber optic network of the present invention is VAR3S system, as depicted in figs. 1 and 2, the system includes soft exchange subsystem, decoding sub-system, high speed switching subsystem and output system, front end video camera connects soft exchange subsystem by optical fiber, the input of the decoding sub-system connects the first output end of soft exchange subsystem, the output end of decoding sub-system connects the first input end of high speed switching subsystem, second output end of the soft exchange subsystem connects the second input of high speed switching subsystem, the high speed switching subsystem output end connects output system.
（1）Soft exchange subsystem：The system is provided with point-to-point access, cascade access, looped network access, the various optical access ports of arbitrary topology access.If front-end camera optical fiber HD-SDI video cameras, then using point-to-point access；If front-end camera is optical fiber self-healing looped network camera, accessed using looped network mode；If front-end camera EPON video cameras, accessed using arbitrary topology form, centre plus optical splitter.
（2）Encoding and decoding subsystem：The signal for being compressed coding is decoded, high speed switching subsystem is entered back into and exchanges upper wall.No matter which kind of access way, the signal transmitted can be divided into compressed signal with uncompressed signal, it is different according to the interface of access soft exchange subsystem, compressed signal is decoded by soft exchange subsystem into encoding and decoding subsystem, entering high speed switching subsystem after decoding, uncompressed signal is then directly entered high speed switching subsystem.
（3）High speed switching subsystem：The real-time exchange of high-capacity and high-speed data is completed, in the control work of system control cpu, other subsystems are all attached thereto.If what front end delivery came is non-compressed signal, then the high speed switching subsystem is directly entered by soft exchange subsystem；If what front end delivery came is compressed signal, it is introduced into encoding and decoding subsystem and is decoded, entering switching subsystem.
（4）System control cpu：All subsystems in control system.System control cpu major control switching subsystem carries out high speed switching signal.
（5）Output system includes large-size screen monitors control system and Networking subsystems, large-size screen monitors control system：The switching of picture signal that controls to come out from switching subsystem, upper wall.The signal come out from switching subsystem, either decoded compressed signal or uncompressed signal enter large-size screen monitors control system, wall is shown in unification, specifically include and devise a DVI output card, this card has 4 DVI delivery outlets, and each mouth can at most correspond to 4 tunnel vision signals, and the Cali is zoomed in and out with fpga chip to this 4 road video,, can picture be exported to DVI mouthfuls and upper wall and shown all the way by result synthesis after splicing.
（6）Networking subsystems：It is mainly used for concatenating each video monitoring apparatus, independent id information is provided with wherein each equipment, the id information includes the identification information of the video monitoring apparatus equipment including the id information, when the video monitoring apparatus, which is concatenated, networks, using the id information build the equipment topology of video monitoring system, so as to realize the function that the networking of monitoring branch center and upper level Surveillance center is uploaded.
The equipment of monitoring branch center is mainly connected with each road video camera of front end, and needs to transfer the image of the key monitoring of all monitoring branch centers under it in upper level Surveillance center.This function is realized that the Networking subsystems of monitoring branch center are connected with the Networking subsystems of Surveillance center by Networking subsystems, and in the case where Surveillance center can realize it, the high-definition image of all monitoring branch centers transfers access in real time.If Fig. 2 is the practical application figure of the high-definition digital screen monitoring system of the invention based on fiber optic network.Include the networking mode of whole system in figure, it is constituted and function declaration is as follows：The mode that front-end camera selection is suitably accessed accesses the video monitoring apparatus of monitoring branch center, and video monitoring apparatus carries out classification processing to signal, and wall is shown on monitoring branch center.Key monitoring image is uploaded into upper level Surveillance center by Networking subsystems simultaneously, wall is shown in Surveillance center.
The video monitoring apparatus of the present invention, in front end, video camera is decoded using asic chip to sdi signal, then parallel data serialization is converted to by CML level by FPGA, the video monitoring apparatus of the present invention is sent to finally by electrooptic conversion module, front end whole process is not compressed processing to data, so optical fiber forward direction speed has reached 1.485Gbps（For HD-SDI）.Reach after video monitoring apparatus, the HD-SDI vision signal signals of the real-time input of Large Copacity are swapped using FPGA, export to output card, so having ensured video information primitiveness, authenticity well.This mode exchanged without compression transmission, and FPGA powerful processing speed cause transmission almost without any delay, therefore support high definition without compression, clog-free real-time Transmission.In addition, for optical sender, the sdi signal of numeral can be accessed, optical transport is converted to video monitoring apparatus, the analog signals such as PAL can also be accessed, be converted to optical transport to video monitoring apparatus, and it is also such for the local access card on matrix.It is critical that the host-host protocol in light path is SDI agreements, the settling mode of Mixed design can be supported by the way that PAL is converted to SD-SDI.
For traditional video monitoring apparatus, prevailing transmission is analog video, there was only PAL this kind of video format, i.e. 625i for the country, so the problem of uniform format is not present.And for the present invention, transmission is sdi signal, and SDI points are SD-SDI, HD-SDI, 3G-SDI, and specific form is as follows：
SD-SDI：576i50Hz,480i60Hz,
HD-SDI：720p50Hz,720p60Hz,
1080p24Hz, 1080p25Hz, 1080p30Hz, 1080i50Hz, 1080i60Hz,
3G-SDI：1080p50Hz,1080p60Hz
For so many video formats, it can be uniformly converted into wherein a certain form by internal video format modular converter, can for example be unified into 1080p60Hz.The modular converter is completed by asic chip, as long as carrying out easy configuration realization to the chip.The form conversion of the video of distinct interface can certainly be supported as needed, and interface is unified into SDI a certain form including VGA, DVI, HDMI, YPbPr etc..
The video monitoring apparatus that the present invention is designed can also support IPC access cards, the IPC access cards are arranged at soft exchange subsystem, devise an IPC access card, it possesses the SFP light input of 16 passages, the agreement of input signal is to utilize conventional agreement according to needs, can also voluntarily it be defined as needed, H.264 network data time slot including SDI videos time slot and IPC etc., the FPGA of the card parses the data of this 16 passage, switching subsystem is entered by backboard for sdi signal and carries out real-time exchange, 16 passages then are pooled into 1 road gigabit networking by RMII interface chips for IPC to export, for reverse, then by the data transfer from gigabit networking mouthful to 16 passage reverse transfers to front end.
As shown in figure 3, the one embodiment concatenated for the present invention, local cabinet interconnection card, the 16 tunnels output of each cabinet, cable is connected to the input card of the 5th cabinet, 16 tunnels of a certain cabinet of switching output.
The flow of the present invention includes：When single business is transmitted, sdi signal can be realized that single fiber is transmitted to the passage soft exchange card of video monitoring apparatus matrix 16 of the present invention by coding, by high speed switching subsystem to the passage SDI output cards of the back side 16, the sdi signal of output turns wall in HDMI converter by SDI and shown；
In multi-service transport, the supplementary service such as sdi signal and other Ethernets can be realized that single fiber is transmitted to the passage soft exchange card of video monitoring apparatus matrix 8 of the present invention by coding, the passage SDI output cards of the back side 8 are exchanged to by high speed switching subsystem, the sdi signal of output turns wall in HDMI converter by SDI and shown；And the lower half on 8 passages input light-card, other supplementary services parsed can be exported, or other business are inputted, it is sent to and transmits to front end.
Fiber optic camera machine is above all also innovatively proposed, as shown above, SDI optical senders are removed, optical signal is directly exported by camera to matrix light-receiving card, simplifies the design of system, also reduces cost.The mentality of designing of the program is, by SDI optical sender Miniaturization Designs, and to be integrated into SDI cameras.
As shown in figure 4, when front end is IP signals, whole processing procedure is as described below：The sensor of camera first（Sensor）Collect after video data, data are done with image procossing by FPGA, then give IP coding modules by H.264 coding module, become 100,000,000 network datas.Ip network number is received after in the soft exchange subsystem of the video monitoring apparatus of the present invention, decoding sub-system decoded ip first, simultaneously can logical 100,000,000 output all the way of ring, then unpacked data is turned into by H.264 decoder module, makees to send after relevant treatment to high speed switching subsystem finally by FPGA and do exchange and the logical SDI outputs of ring.
As shown in figure 5, when front end is sdi signal, whole processing procedure is as described below：The sensor of camera first is collected after video data, and data are done with image procossing by FPGA, and then directly giving SDI coding modules by parallel data produces SDI serial datas, and the data directly walk optical module.In video monitoring apparatus, optical module is received after SDI data, gives the SDI decoder modules of decoding sub-system, then is made to send after relevant treatment to backboard by FPGA and is done exchange and the logical SDI outputs of ring.
As shown in fig. 6, when front end is IP and sdi signal, whole processing procedure is as described below：The sensor of camera first is collected after video data, image procossing is done to data by FPGA, then IP coding modules are given by H.264 coding module, become 100,000,000 network datas, the data return to FPGA, it is encoded into certain agreement inside FPGA together with sdi signal, the agreement can also can as needed carry out self-defining using conventional agreement.In video monitoring apparatus, receive after data, protocol analysis data are pressed by FPGA, the SDI data parsed directly go high speed switching subsystem to exchange and this snap ring leads to, the H.264IP data parsed（Totally 8 tunnel）Enter the exchange of switch Switching Modules and be output to a RJ45 gigabit mouthful.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; some improvements and modifications can also be made, these improvements and modifications also should be regarded as in the scope of the present invention.
Claims (7)
1. the high-definition digital video supervising device based on fiber optic network, it is characterized in that, including soft exchange subsystem, decoding sub-system, high speed switching subsystem and output system, front end video camera connects soft exchange subsystem by optical fiber, the input of the decoding sub-system connects the first output end of soft exchange subsystem, the output end of decoding sub-system connects the first input end of high speed switching subsystem, second output end of the soft exchange subsystem connects the second input of high speed switching subsystem, and the high speed switching subsystem output end connects output system.
2. the high-definition digital video supervising device according to claim 1 based on fiber optic network, it is characterized in that, the output system includes large-size screen monitors control system and Networking subsystems, the large-size screen monitors control system is is directly displayed vision signal, and the Networking subsystems are used for the input for concatenating the soft exchange subsystem of another high-definition digital video supervising device based on fiber optic network.
3. the high-definition digital video supervising device according to claim 2 based on fiber optic network, it is characterized in that, the soft exchange subsystem includes IPC access cards, SFP light of the IPC access cards provided with 16 passages is inputted, the IPC access cards are provided with FPGA, and the FPGA realizes the parsing of the SFP light input to 16 passages, transmits sdi signal to high speed switching subsystem if to be resolved to sdi signal, such as it is IPC signals, then it is pooled into 1 road gigabit networking by RM II interface chips exports.
4. the high-definition digital video supervising device according to claim 2 based on fiber optic network, it is characterized in that, the video monitoring apparatus is additionally provided with id information, the id information includes the identification information of the video monitoring apparatus equipment, when the video monitoring apparatus, which is concatenated, networks, using the id information build the equipment topology of video monitoring system.
5. the high-definition digital video monitoring method based on fiber optic network, it is characterised in that comprise the following steps：
When preposition video camera is IP+SDI video cameras, the sensor of video camera collects video data, image procossing is done to the video data by built-in FPGA, then IP coding modules are given by H.264 coding module, so as to export 100,000,000 network datas, the data return to FPGA, it is encoded together with sdi signal inside FPGA, video monitoring apparatus is received after data, data are parsed by FPGA, the SDI data parsed directly go high speed switching subsystem to exchange and the logical SDI outputs of ring, the H.264IP data parsed are then decoded using decoding sub-system, then enter the exchange of high speed switching subsystem and be output to a RJ45 gigabit mouthful.
6. the high-definition digital video monitoring method based on fiber optic network, it is characterised in that comprise the following steps：When preposition video camera is IP video cameras, the sensor of video camera is collected after video data, image procossing is done to data by FPGA, then IP coding modules are given by H.264 coding module, so as to export 100,000,000 network datas, video monitoring apparatus receive data post-reception to ip network number according to after, pass through decoding sub-system decoded ip, simultaneously can logical 100,000,000 output all the way of ring, then unpacked data is turned into by H.264 decoder module, makees to send after relevant treatment to high speed switching subsystem finally by FPGA and do exchange and the logical SDI outputs of ring.
7. the high-definition digital video monitoring method based on fiber optic network, it is characterised in that comprise the following steps：When preposition video camera is SDI video cameras, the sensor of video camera is collected after video data, image procossing is done to data by FPGA, then SDI coding modules directly are given by parallel data and produces SDI serial datas, after video monitoring apparatus receives SDI data, SDI decoder modules are given, then makees to send after relevant treatment to high speed switching subsystem by FPGA and does exchange and the logical SDI outputs of ring.
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| CN105136275B (en) * | 2015-07-11 | 2018-07-10 | 苏州至禅光纤传感技术有限公司 | All -fiber distribution vibrating sensing and video monitoring system |
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| CN106791705A (en) * | 2017-01-24 | 2017-05-31 | 杭州中威电子股份有限公司 | A kind of simple and direct tunnel HD video of low cost changes system |
| CN109698936A (en) * | 2018-12-12 | 2019-04-30 | 武汉中科天宇科技有限公司 | A kind of video monitoring system and video monitoring method for wisdom traffic |
| CN110958405A (en) * | 2019-11-22 | 2020-04-03 | 中船重工（武汉）凌久电子有限责任公司 | Ultra-high-definition display control system and method based on optical fiber encoding and decoding 4Kx2K |
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