CN103595970A - Video monitoring device and method for rapidly switching analog video and IP video - Google Patents
Video monitoring device and method for rapidly switching analog video and IP video Download PDFInfo
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Abstract
The invention discloses a video monitoring device and method for rapidly switching an analog video and an IP video. The video monitoring device comprises at least one connector, a video signal converter, an IP video storage module and a control module. A video signal conversion module converts a differential signal which is introduced by the connector and converted from an analog video image signal to the analog video image signal again. The IP video storage module stores an introduced IP video image signal. The control module selects the analog video image signal or the IP video image signal according to the service state and outputs the selected signal to a displayer. The invention further discloses the video monitoring method for rapidly switching the analog video and the IP video based on the video monitoring device. By the adoption of the video monitoring device and method for rapidly switching the analog video and the IP video, the analog video and the IP video can be rapidly switched and rapid snapshot and tracking can be conducted.
Description
Technical field
The invention belongs to technical field of video monitoring, relate in particular to and in video monitoring system, realize analog video and IP video transmits simultaneously, and video monitoring apparatus and the method that can switch fast.
Background technology
Video monitoring is the important component part of safety and protection system, video monitoring is directly perceived with it, accurately, in time and the information content abundant and be widely used in many occasions.In recent years, along with computer, network and image are processed, the develop rapidly of transmission technology, Video Supervision Technique has also had significant progress.Because the arrival of networking, the universalness trend of video monitoring is more and more obvious.
Video monitoring has obtained very many application in field of traffic control, and video camera has all been installed at each crossroad and other traffic block port places at present, in real time traffic is comprehensively controlled.Along with the development of technology, in traffic administration supervisory control system, not only there is analog video camera at present, also have IP video camera, or analog video camera transmits video signal digitization by encoder in IP network.Owing to having adopted video data digitlization and having transmitted by IP network, effectively solved the signal impairment that transmission range is brought, can transmit distance far away.But because video data need to pass through a series of processes such as coding, transmission and decoding, cause video monitoring system aspect image real-time, slower than simulated monitoring system.Sometimes be difficult to reach the requirement of figure line time delay under to the higher application scenarios of monitoring image requirement of real-time, especially when traffic block port is captured break in traffic rules and regulations, because the movement velocity of vehicle is fast, traffic police is when control The Cloud Terrace forwards tracking to, Image Coding time delay causes following the tracks of fast vehicle, is more difficult to reach the demand that traffic police captures fast.
In prior art, by simulation monitoring mode, can be captured fast and be followed the tracks of operation, but the decay of coaxial cable transmission of analogue signal is larger, cannot grow Distance Transmission, and adopt optical transmitter and receiver and optical fiber mode to transmit, cost is very large.These two kinds of modes all cannot well merge with IP monitor mode simultaneously.
Summary of the invention
The object of the invention is for the problems referred to above, a kind of analog video and IP video transmit simultaneously and switch fast supervising device and method are proposed, the fusion problem that solves analog video monitoring and IP video monitoring, can realize as required and switching fast, captures fast.
In order to realize foregoing invention object, technical solution of the present invention is as follows:
Analog video and IP video be a video monitoring apparatus for switching fast, is applied to comprise the video monitoring system of headend equipment and display, and described device comprises:
At least one connector, the IP video signal sending for while headend equipment and the differential signal converting to according to analog video image signals;
Video-frequency signal converter, for being again converted to analog video image signals by the differential signal of access;
IP video storage module, for storing the IP video signal of access;
Control module, for selecting analog video image signals or IP video signal to output to display according to service condition.
Further, described device also comprises difference forwarding module, for amplifying and forward the differential signal of access; Described control module is also for sending and have access to instruction to low-level device, or/and receive the instruction of having access to of upper stage arrangement, and according to the instruction of having access to receiving, control the differential signal that described difference forwarding module forwards access, or/and control the IP video signal of described IP video storage module forwards access.By difference forwarding module and control module, realized the cascade of apparatus of the present invention, expanded the scale of video monitoring system, higher level equipment can be had access to the vision signal of subordinate equipment.
Further, described service condition comprises that fact watches business and capture tracking business, when service condition is that fact is while watching business, described control module selects IP video signal to output to display, when service condition is while capturing tracking business, described control module selects analog video image signals to output to display; Described control module is also for setting up associated by the candid photograph image of capturing the candid photograph of tracking business with the IP video image of described IP memory module storage.By by capture image and the IP video of storage carry out associated, while being convenient to capture image querying and preview, the IP video image of can auto-associating storing, for reference.
The invention allows for the video frequency monitoring method that a kind of analog video and IP video switch fast, be applied to comprise the video monitoring system of headend equipment and display, described method comprises step:
The IP video signal that receiving front-end equipment sends and the differential signal converting to according to analog video image signals;
The differential signal of access is converted to analog video image signals again;
The IP video signal of access is stored;
According to service condition, select analog video image signals or IP video signal to output to display.
Further, for multilevel mode, described method also comprises step: send or/and instruction is had access in reception, according to the differential signal that access is amplified and forwarded in instruction of having access to receiving, or/and forwarding IP video signal.
Further, described service condition comprises that fact watches business and capture tracking business, when service condition is that fact is while watching business, select IP video signal to output to display, when service condition is while capturing tracking business, select analog video image signals to output to display, and the IP video image foundation of the candid photograph image that candid photograph tracking business is captured and storage is associated.
Video monitoring apparatus and method that a kind of analog video that the present invention proposes and IP video switch fast, headend equipment is converted to differential signal by analog video image signals, together with IP video signal, on twisted-pair feeder, transmit, apparatus of the present invention receive differential signal and IP video signal, differential signal is converted to analog video image signals, by control module, according to service condition, select analog video image signals or IP video signal to export, can realize the quick switching of analog video and IP video, be applicable under IP world, carry out low delay business as captured and following the tracks of.
Accompanying drawing explanation
Fig. 1 is the networking structure schematic diagram of the embodiment of the present invention one;
Fig. 2 is the embodiment of the present invention two switching device shifter structural representations;
Fig. 3 is the networking structure schematic diagram of the embodiment of the present invention three multilevel modes;
Fig. 4 is the video frequency monitoring method flow chart that analog video of the present invention and IP video switch fast.
Embodiment
Below in conjunction with drawings and Examples, technical solution of the present invention is described in further details, following examples do not form limitation of the invention.
In whole security protection/video monitoring system, the transmission of video image is very important link.Being used for the medium of transmitting video image signal mainly contains coaxial cable, optical fiber and twisted-pair feeder.Due to the characteristic of coaxial cable self, when video signal transmits in coaxial cable, its decay being subject to is relevant with the frequency of transmission range and signal itself.When video signal transmits in coaxial cable, not only signal overall magnitude is decayed, and each frequency component attenuation differs greatly, the color maximum that partly decays particularly, so coaxial cable is only suitable in the video of 200 meters of left and right of transmission range.Optical fiber is used in order to solve remote video signal transmission, because optical fiber integrally transmission system price is too high, optical fiber is laid, connection needs Special Equipment, and Installation and Debugging difficulty, fault difficulty is looked for, damage not the defects such as easy-maintaining, for 2000 meters, with for interior closely transmission of video, optical fiber is not one and well selects.Twisted-pair feeder is the best-of-breed technology scheme that solves at present this application problem, has obtained a large amount of uses in present supervisory control system.Use at present five classes or without the above unshielded twisted pair of class line as transmission medium, the base band video picture signal of the standards such as real-time Transmission monochrome or colored PAL, NTSC, SECAM, superpower interference suppresses, ultralow electromagnetic radiation ability can make four pairs of lines in unshielded twisted pair appoint to get a pair of line just can transmission of one line video signal, the four pairs of lines can transmit four road videos, two twisted-pair feeders (totally eight pairs of twisted-pair feeders) transmit eight road videos and do not interfere with each other, and can transmission range be greater than 1500 meters.
The present embodiment utilizes the ability of Double-strand transmission video signal, adopts twisted-pair feeder transportation simulator video signal and IP video signal (digital video image data) simultaneously.Ethernet twisted pair is only used four couples of two couples in twisted-pair feeder at present, general only use a kind of in 1,2,3,6 line orders or two kinds of combinations of 4,5,7,8 line orders, the present embodiment carrys out transportation simulator video data with remaining two centerings a pair of, as 7,8 line orders or 1,2 line orders, reach the effect that analog video image signals and digital video image signal transmit simultaneously.
As shown in Figure 1, the networking structure schematic diagram of the embodiment of the present invention one, comprises video monitoring apparatus (hereinafter to be referred as switching device shifter), display that headend equipment, analog video and IP video switch fast.
Wherein, headend equipment comprises IP video camera, video-frequency signal converter and connector, in the present embodiment, connector adopts RJ45 interface, for example the IP video signal of IP video camera output adopts line order 1,2,3,6 to transmit, the analog video image signals of IP video camera output, after video-frequency signal converter is converted to differential signal, adopts 7,8 line orders of RJ45 interface to transmit.
The IP video signal of IP video camera with IP for mode ethernet line (category-5 cable) transmit, and the analog video image data of IP video camera, after twisted-pair cable video transmission technology is carried out signal conversion, by the differential signal after conversion, utilize idle a pair of twisted-pair feeder to transmit.IP video camera can be converted to the analog video image signals of shooting digital IP video signal, and analog video image signals and IP video signal are provided simultaneously, also can, according to user's needs, select a road signal to use.
Analog video image signals and the IP video signal of headend equipment output arrive the switching device shifter of far-end by Double-strand transmission, the switching device shifter of the present embodiment comprises connector, video-frequency signal converter, IP video storage module and control module, and wherein connector is RJ45 interface equally.The signal that connector RJ45 interface is come Double-strand transmission is divided into two-way output, respectively IP video signal and differential signal, wherein IP video signal accesses IP video storage module, and the differential signal incoming video signal transducer that analog video image signals converts to, video-frequency signal converter is converted to analog video image signals by differential signal.And one end of control module connects the display that video monitoring is used, the other end connects video-frequency signal converter and IP video storage module, according to the needs of business, selects analog video image signals or IP video signal to output to display.
The control module of the present embodiment can be carried out output switching according to service condition, under normal circumstances, service condition is that business is watched in fact, adopt IP video signal to watch in real time business, control module is set during system initialization and is placed in IP video signal output state, now on display, export the high definition decoded video based on IP video signal, IP video storage module is stored IP video signal according to IP mode simultaneously; When service condition is switched to candid photograph tracking business, control module is switched to analog video image signals output state, display output analog video image signals.
When analog video image signals is exported, carry out the tracking business of capturing, IP video storage module is stored IP video signal data according to IP mode simultaneously, guarantees not interrupting continuously of video record.The IP video image of the candid photograph image of taking while capturing and the storage of IP memory module is all kept in storage medium, and to there being memory location separately, control module is undertaken associated by capturing the memory location of image and the memory location of IP video image.The associated IP video image time period can arrange, and is defaulted as to capture to move first 3 seconds to capturing latter 5 seconds of action.
In database, by table 1, set up and capture the associated of image and IP video image:
Table 1
Database, only need to be by specifically capturing the memory location of image and the storage original position of IP video image, store end position and associate management when carrying out associate management.By the association of table 1, when capturing image querying and preview, select certain to capture image, can be according to incidence relation above, IP video image that can auto-associating storage, for reference.
The networking structure schematic diagram of the embodiment of the present invention two as shown in Figure 2, is the embodiment under multichannel headend equipment input condition.Switching device shifter comprises at least one connector, the video signal of multichannel headend equipment is linked into after the connector of switching device shifter, connector is linked into video-frequency signal converter by differential signal and is converted to analog video image signals, by IP video signal access IP video storage module.
In embodiment bis-, control module not only can be selected different output according to service condition, can also select the video signal of concrete which headend equipment, shows.
Easily understand, multichannel IP video signal can adopt hub or IP switch to be linked into IP video storage module, below repeats no more.
The networking structure schematic diagram of the embodiment of the present invention three as shown in Figure 3, by the cascade of switching device shifter, can expand the scale of video monitoring, switching device shifter 1, as subordinate's switching device shifter, is shared analog video image signals and IP video signal to the switching device shifter 2 as higher level's switching device shifter.
The switching device shifter of the present embodiment also comprises difference forwarding module, for amplifying and forward the differential signal of access, the control module of switching device shifter 2 is had access to instruction by transmission, the control module of switching device shifter 1 receives has access to instruction, control the differential signal that difference forwarding module forwards access, control the IP video signal of IP video storage module forwards access.
The control module of switching device shifter 2 is had access to instruction by transmission, can directly have access to the IP video signal of switching device shifter 1, also can have access to the analog video image signals of switching device shifter 1.When switching device shifter 2 need to be had access to the analog video image signals of switching device shifter 1, only need to send switching requirement to switching device shifter 1, the analog video image signals output of the IP video camera that the control module control difference forwarding module of switching device shifter 1 is had access to needs, is transferred to switching device shifter 2.When switching device shifter 2 need to be had access to the IP video signal of switching device shifter 1, only need to send switching requirement to switching device shifter 1, the control module of switching device shifter 1 is controlled IP video signal corresponding to IP video storage module forwards.
IP video signal outputs to before display, conventionally need to decode by decoder, decoder can be arranged between the switching device shifter and control module of the present embodiment, also can be arranged in display or between display and the present embodiment switching device shifter, the invention is not restricted to adopt which kind of mode.
The present embodiment can be realized cascade and the expansion of more switching device shifters, if a plurality of subordinates switching device shifter is to higher level's switching device shifter, or the connection of multistage switching device shifter, below repeat no more.
It should be noted that, the video monitoring apparatus that analog video of the present invention and IP video switch fast can be integrated on digital hard disc video recorder (DVR) or network hard disk video recorder (NVR).For the access of the headend equipment of multichannel, only need access and forward IP video signal by switch, the present embodiment repeats no more for the interconnected method of conventional IP.
The present invention is based on above-mentioned switching device shifter, realize the quick video frequency monitoring method flow chart switching of analog video and IP video as shown in Figure 4, comprise step:
The IP video signal that receiving front-end equipment sends and the differential signal converting to according to analog video image signals;
The differential signal of access is converted to analog video image signals again;
The IP video signal of access is stored;
According to service condition, select analog video image signals or IP video signal to output to display.
Single-stage application scenarios is as shown in Figure 1 applicable to the video monitoring situation of small-sized garden or small-sized Traffic Warden Subteam, for wider use scenes, conventionally need to adopt the pattern of multiple management, and multiple management as shown in Figure 3.For the pattern of multiple management, the method for the present embodiment also comprises step:
Send or/and instruction is had access in reception;
According to the differential signal that access is amplified and forwarded in instruction of having access to receiving, or/and forward IP video signal.
Further, when service condition is, while capturing tracking business, also to comprise step:
When capturing tracking business, the candid photograph image that candid photograph tracking business is captured and the IP video image of storage are set up associated.By by capture image and the IP video of storage carry out associated, while being convenient to capture image querying and preview, the IP video image of can auto-associating storing, for reference.
By multiple management pattern, expanded the scale of video monitoring, can large scale deployment in large-scale community or realize the video monitoring of city scope.
Above embodiment is only in order to technical scheme of the present invention to be described but not be limited; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. the video monitoring apparatus that analog video and IP video switch fast, is applied to comprise it is characterized in that the video monitoring system of headend equipment and display, and described device comprises:
At least one connector, for access the IP video signal of headend equipment transmission and the differential signal converting to according to analog video image signals simultaneously;
Video-frequency signal converter, for being again converted to analog video image signals by the differential signal of access;
IP video storage module, for storing the IP video signal of access;
Control module, for selecting analog video image signals or IP video signal to output to display according to service condition.
2. device according to claim 1, is characterized in that, described device also comprises difference forwarding module, for amplifying and forward the differential signal of access.
3. device according to claim 2, it is characterized in that, described control module is also for sending and have access to instruction to low-level device, or/and receive the instruction of having access to of upper stage arrangement, and according to the instruction of having access to receiving, control the differential signal that described difference forwarding module forwards access, or/and control the IP video signal of described IP video storage module forwards access.
4. device according to claim 1, it is characterized in that, described service condition comprises that fact watches business and capture tracking business, when service condition is that fact is while watching business, described control module selects IP video signal to output to display, when service condition is while capturing tracking business, described control module selects analog video image signals to output to display.
5. device according to claim 4, is characterized in that, described control module is also for setting up associated by the candid photograph image of capturing the candid photograph of tracking business with the IP video image of described IP memory module storage.
6. the video frequency monitoring method that analog video and IP video switch fast, is applied to comprise it is characterized in that the video monitoring system of headend equipment and display, and described method comprises step:
The IP video signal that receiving front-end equipment sends and the differential signal converting to according to analog video image signals;
The differential signal of access is converted to analog video image signals again;
The IP video signal of access is stored;
According to service condition, select analog video image signals or IP video signal to output to display.
7. method according to claim 6, is characterized in that, described method also comprises step:
Send or/and instruction is had access in reception;
According to the differential signal that access is amplified and forwarded in instruction of having access to receiving, or/and forward IP video signal.
8. method according to claim 6, it is characterized in that, described service condition comprises that fact watches business and capture tracking business, when service condition is that fact is while watching business, select IP video signal to output to display, when service condition is while capturing tracking business, select analog video image signals to output to display.
9. method according to claim 8, is characterized in that, described method also comprises step: the candid photograph image that candid photograph tracking business is captured and the IP video image of storage are set up associated.
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Citations (4)
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| CN1151656A (en) * | 1995-09-29 | 1997-06-11 | 三星电子株式会社 | Receiver having analog and digital video modes and receiving method thereof |
| CN1670676A (en) * | 2004-03-19 | 2005-09-21 | 联想(北京)有限公司 | Bus type keyboard, display and mouse switching control apparatus and method |
| CN103051885A (en) * | 2013-01-18 | 2013-04-17 | 深圳英飞拓科技股份有限公司 | Analog-to-digital hybrid video comprehensive monitoring system and method |
| CN203167132U (en) * | 2013-01-31 | 2013-08-28 | 深圳市泛海三江电子有限公司 | Video monitor system |
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- 2013-11-21 CN CN201310596563.7A patent/CN103595970B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151656A (en) * | 1995-09-29 | 1997-06-11 | 三星电子株式会社 | Receiver having analog and digital video modes and receiving method thereof |
| CN1670676A (en) * | 2004-03-19 | 2005-09-21 | 联想(北京)有限公司 | Bus type keyboard, display and mouse switching control apparatus and method |
| CN103051885A (en) * | 2013-01-18 | 2013-04-17 | 深圳英飞拓科技股份有限公司 | Analog-to-digital hybrid video comprehensive monitoring system and method |
| CN203167132U (en) * | 2013-01-31 | 2013-08-28 | 深圳市泛海三江电子有限公司 | Video monitor system |
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