视频监控系统外文翻译.docx

1、视频监控系统外文翻译外文文献Video surveillance system is safe guard system is an important part of a preventive ability strong comprehensive system. Video monitoring with its convenient, intuitive and information content rich and widely used in many occasions. In recent years, with the development of modern scien

2、ce and technology, in particular network bandwidth, computer processing power and storage capacity rapidly increase and various practical video information processing technology, video surveillance technology also appeared a considerable development, video monitoring entered the digital network age,

3、 increasingly attention by people and attention. The development of video surveillance system is mainly early analog closed-circuit television monitoring system combined to video monitoring system model of digital video monitor and now the evolution process, and the system of digital video monitor s

4、ystem now according to the technical development and divided into three stages: digital monitor multimedia stage, digital monitor DVR stage and digital monitor network stage. 1, video monitoring system simulations simulate video monitoring system is divided into microprocessor-based video switch con

5、trol plus PC multimedia management and pc-based realize the switch control of matrix host and system multimedia management two types. Analog closed-circuit television monitoring system is actually the combination of many simulation monitoring equipment, system mainly consists of front-end device and

6、 terminal control device and signal transmission medium three parts, including: front-end equipment is mainly a camera, haeundae, decoder, control equipment is mainly a switching matrix, image segmentation device, monitor and control the keyboard, video, etc. Transmission medium including cable, con

7、trol, etc. As microprocessors, the function, performance of microcomputers and heighten, multimedia technology application, the system in functionality, performance, reliability, structure pattern, etc, great changes have happened to the video monitoring system, more convenient, the composition of t

8、he interface with other technical system tends to regulate, man-machine interface more friendly. But because video monitor and control system in the flow of information form does not change, the video signal is still simulation system, the network structure is mainly a ChanGongNeng, one-way, lumped

9、way of information collection network, so system although has developed to a high level, has not much potential can dig, its limitations still exist, to meet the higher request, digital is the only way. Simulation monitoring system of main faults are: a, usually only suitable for small range of regi

10、onal monitor video signal transmission, simulation tools, and is mainly coaxial cable to transmit analog video signal coaxial cable, the distance is not more than the distance twisted-pair dump more short, this determines the analog monitor only suitable for single building, small neighborhood and o

11、ther small range of places. B, the system of expansion ability difference for has already built good system, if want to add new monitory point, often is one change makes all change, new equipment is also hard to add to the original system in. C, unable to form effective alarm linkage, because each p

12、art between independent operation, the control protocol is difficult to each other, linkage in the limited scope only. 2 video monitoring system, digital multimedia technology, video with compression technology, network communication technology of digital video surveillance system development, the r

13、apid rise, on the market today there are two types of digital video monitor system type, one is the digital video equipment video monitoring system for the core, another kind is embedded video Web server video monitoring system for the core. Digital video compression technology matures, the computer

14、 based on PC universalization, create conditions multimedia monitor. This new video monitoring system of rapid rise, partially replaced with video matrix image segmentation device, video as the core, complementary with other transmitter simulation video monitor mode, its advantage mainly displays in

15、: a, PC multimedia monitor video matrix, the host integrated image segmentation device, many functions of video recorders, simplifies the structure of the system. B, because use the computer network technology, digital multimedia remote network monitor from distance limit. C, due to the large capaci

16、ty disk array inventory device or CD storage, can save you a lot of tape medium, and it is helpful to the multimedia information system. But as the PC video surveillance video system development, in actual engineering in use process, also exposed some shortage, mainly system work instability. The vi

17、deo surveillance video based on PC for: the structure of system compatible/industrial PC + video capture card + ordinary/more reliable operation platform + application software. From the system composition structure to analysis: a, PC for 24 hour uninterrupted job, its performance is not very stable

18、, g-kong PC relative compatible PCs stability have a class enhancement, suitable for complex working environment. B, operating system: with Windows 98 for operation platform system, the industry insiders know, there are certain Win98 stability problem, if at the same time the application software is

19、 not very standardized, itll be easier in use process appears work instability, freezes and other issues, and PC video surveillance video system realization of their software in Windows 95/98 / NT, Unix, Linux operating system, such as general while system files, application software and image files

20、 are stored in the disk, video processing must high-density input of large quantities of data, and to work hard drive, the average for the hard disk logic (such as Windows, already cant adapt to FAT32) so susceptible, causing instability crashed phenomenon. C, application software: the simple applic

21、ation software system is not can be used for security video monitoring system, fields of application software ability should support multitasking concurrent processing, such as monitoring, video, playback, backup, alarm, control, remote connection, etc. The ability to deal with more work D, video ca

22、pture card: video surveillance video system for road input system are usually video capture card, can use multiple CARDS way, also can use single card mode. Say commonly, a single card way better integration high stability will more than all the way, many using card has a card way very easy to form

23、hardware conflicts, its stability will have a major influence. Embedded system is used as the center, software and hardware can be cut, to adapt application system function, reliability and cost, volume etc comprehensive demanding special computer system for monitoring system, i.e. the special compu

24、ter system tailored. Embedded system mainly consists of embedded processor, relevant support hardware, embedded operating system and application software system etc, it is the collection software and hardware in the integration of can work independently devices. Embedded operating system is a kind o

25、f real-time, supports embedded system application operating system software, it is embedded system extremely important constituent, usually includes and hardware related software drivers, system kernel bottom, device driver interface, communication protocol, graphic interface, standardization browse

26、rs, embedded real-time operating system in the related hardware and efficiency of dependence, software application and specificity solid state has more prominent characteristics. The advantages and disadvantages of embedded system, the system for a special system, so the system is small, instruction

27、 downsizing and processing speed. B, system data in ROM/FLASH with fast speed, call, not be altered, good stability. C, system treatment of good real-time performance, stable performance. D, document management system is more suitable for large amounts of video data. E, in network function, audio an

28、d video sync issues may also difficult satisfactory. Embedded video Web server mode, a built-in video server embedded Web server, the embedded real-time multitasking operating system. The video signal digital camera sent by high compression chip after through internal bus to compress, built-in Web s

29、erver, Internet users can use directly on the Web server browsers on camera images, subscribers can also control the camera lens, haeundae, the actions or operate on system configuration. Because the video compression and Web function centralism to a small size within the equipment can be directly c

30、onnected lans, achieve namely that look, omited inserted range of complex cable, convenient installation (only set an IP address), the user does not need to install any hardware device, with the browser can only watch. Embedded video Web server monitoring system and other surveillance system has the

31、 following characteristics: a comparison of embedded video area is vast, have been supervised Web server monitoring system of Web server directly connected network, no cable length and attenuation, and the limit of the concept of network is no distance, completely abandoned regional concept, expand

32、have been supervised areas. B, the system has almost unlimited seamless expansion ability all equipment is mark, with IP address increased equipment just means that IP address the expansion. C, can form a very complicated monitoring network based on embedded Web server is the core of the monitoring

33、system in network mode, with traditional analog monitor and based on PC platforms screening method has greatly different, because Web server output has completed analog to digital conversion and compression, adopt uniform agreement on the network transmission, support across the router across the gateway, remote video transmission. D, stable and reliable performance, w