Video Surveillance In The Intelligent Building System Design And Applications

"the intelligent construction" is the structure, the system, the service, the operation and mutually relates the comprehensive synthesis, and achieved the best combination, obtains high efficiency, high function and high comfortable building . In Singapore, stipulated the intelligent building must meet 3 requirements: one is has the security, the fire prevention and the environment control and soon the advanced automation control system, as well as automatic control parameter and so on in building temperature, humidity, light each kind of facility, creates the comfortable safe and secure environment; Two, has the good correspondence network facility enables the data to carry on the circulation in the building; Three, can provide the enough foreign correspondence facility and the ability. In intelligent construction, television supervisory system function count for much. It may protect in the building the personal safety and the property security, guards against the region when the illegal molecular invasion, can cause the security personnel promptly to discover around understood its activity, simultaneously has the event to have the information record, in order to afterwards has the process to the event to carry on the analysis, protects each kind of property..At present in the intelligent construction and the intellectualized plot closed circuit television supervisory system, absorbs record from the picture signal, to the picture signal transmission, the memory, the transfer, returns puts mostly uses is the simulated signal; The signal transmission is use coaxial cable this kind of medium completes. Is constructing the large-scale television super visory system in particular time, picture signal gathering, the transmission, the memory, needs the massive transmissions medium to set up the network; Also needs the massive videorecorders, the video recordingbrings the memory picture information. This inevi- tably will bring themassive wiring work, the massive pictures memory work, the massivepictures retrieval work. To constructs the side the manpower, the physical resource, the financial resource all is one kind of test . Along with the digital television super visory system maturity, the computer network and does the synthesis wiring widespread application, how use the good synthesis wiring system and the computer network system reduces the system the wiring, saves the picture using the computer hard disk system, thus reduced picture memory work load and retrieval work load. This is in the present intelligence construction, the intelligent plot constructs the large-scale closed circuit television supervisory system to have to face the solution the main question.The present paper through the elaboration intelligence construction in the television supervisory system composition stru-cture, the system main equipment performance characteristic, the technical specification parameter, explained how in constructs in the CCTV system the selective price as well as how constructs the performance good the outstanding product, technological advance, the is safer than reliable television supervisory system; Through the digital television supervisory system video frequency ga- thering card, inserts the typehard disk videorecorder the system performance and the technicalparameter, the selection index compared to as well as the simulation television supervisory system and the digital television supervisory system good and bad points compared to, explained how will construct the digital television supervisory system, how uses the existing simulation television supervisory system to transform the digital television supervisory system as well as the digital television supervisory system in the future development tendency; Through the quite coaxial cable, the twisted pair line, the optical fiber, the radio frequency modu- lation transmission transmitting range, the transmission band and the band width, the signal attenuation range and so on did the good and bad points, how show us in the project the effective reasonable selection signal transmission mode and the transmission medium; Through the elaboration video signal each compression way, the video frequency gathering card engineering data and the selection standard, showed we when choice use network transmission video signal how the effective reasonable use network transmission speed, does the computer hard disk capacity as well as how obtain the smooth video frequency to flow the transmission, the clear stable video frequency returns puts the signal. The above judgment designs in me "Jinan Railroad Professional Technology Institute Really Taught Synthesis Building Safe Guard System" in the project example to carry on the practical application, has obtained the good use effect.I thought in the later intelligence construction and the intel-lectualized plot closed circuit television supervisory system will be take the digital television supervisory system as the mainstream, take synthesizes the wiring system as the carrier, the union video frequency conference system, the video on demand system synthesis application body. Present analogdigital television supervisory system, also will certainly with the digital television supervisory system union, through to the simulated signal digitized transfor- mation, realizes the digitization video signal trans mission , the control, the record, the retrieval, returns puts and so on the function.In transmits video frequency monitoring picture signal time using the computer network, often can because a video frequency document package of data quantity too greatly causes network transmission crowded, in particular in the ethernet in the local area network which massivelyuses. Because the ethernet uses is the carrier monitor - collisiondetection (CSMA/CD) the multichannel visit strategy, the data quantity big transmission occupies the time is long. Solves this question method I to think may begin from following several: When 1st, in the video frequency picture which the use video frequency server visits , strengthens the video fre- quency server processing document the ability, thus speeds up the data accessing the speed. 2nd, uses the new algorithm, develops the new compression way, the effective compression video frequency data packet size, may like this in the limited network band width and the transmission speed, transmission as far as possible many data quantities. At present the most advanced video frequency com-pression form is H. 264. We are selecting the video frequency gathering card time, must select the hardware to reduce the way as far as possible, the compression form H. 264 product. 3rd, when sets up the network, may consider uses the ATM network. Thus, may turn round using the time-sharing with the method which duplicate uses with the frequency division, separately transmits the image data document and other data files.