視頻監(jiān)控系統(tǒng)外文翻譯譯

1、.中文3630字畢業(yè)設(shè)計外文翻譯 2014 屆 信息科學(xué)與工程 學(xué)院 通信工程 專業(yè)題 目： 子 題： 外文文獻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 y

2、ears, with the development of modern science 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 m

3、onitoring entered the digital network age, 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,

4、 and the system of digital video monitor system 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

5、into microprocessor-based video switch control 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, syst

6、em mainly consists of "front-end device" and "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

7、and control the keyboard, video, etc. Transmission medium including cable, control, 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

8、happened to the video monitoring system, more convenient, the composition of the 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 simul

9、ation system, the network structure is mainly a ChanGongNeng, one-way, lumped 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 monitori

10、ng system of main faults are: a, usually only suitable for small range of regional 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

11、the analog monitor only suitable for single building, small neighborhood and other 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

12、 original system in. C, unable to form effective alarm linkage, because each part 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 co

13、mmunication technology of digital video surveillance system development, the rapid 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 s

14、ystem for the core. Digital video compression technology matures, the computer 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 oth

15、er transmitter simulation video monitor mode, its advantage mainly displays in: 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 mul

16、timedia remote network monitor from distance limit. C, due to the large capacity 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 u

17、se process, also exposed some shortage, mainly system work instability. The video 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 ana

18、lysis: a, PC for 24 hour uninterrupted job, its performance is not very stable, g-kong PC relative compatible PC's 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 a

19、re certain Win98 stability problem, if at the same time the application software is not very standardized, it'll 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 op

20、erating system, such as general while system files, application software and image files 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 can't adapt to FAT32) so su

21、sceptible, causing instability crashed phenomenon. C, application software: the simple application 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, b

22、ackup, alarm, control, remote connection, etc. The ability to deal with more work D, video capture 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

23、 high stability will more than all the way, many using card has a card way very easy to form 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

24、comprehensive demanding special computer system for monitoring system, i.e. the special computer 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 hardwar

25、e in the integration of can work independently "devices". Embedded operating system is a kind of real-time, supports embedded system application operating system software, it is embedded system extremely important constituent, usually includes and hardware related software drivers, system

26、kernel bottom, device driver interface, communication protocol, graphic interface, standardization browsers, 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 a

27、nd disadvantages of embedded system, the system for a special system, so the system is small, instruction 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, docu

28、ment management system is more suitable for large amounts of video data. E, in network function, audio and 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 s

29、ignal digital camera sent by high compression chip after through internal bus to compress, built-in Web server, 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

30、 the video compression and Web function centralism to a small size within the equipment can be directly connected 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

31、browser can only watch. Embedded video Web server monitoring system and other surveillance system has the 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 attenuatio

32、n, and the limit of the concept of network is no distance, completely abandoned regional concept, expand 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, c

33、an form a very complicated monitoring network based on embedded Web server is the core of the monitoring 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

34、compression, adopt uniform agreement on the network transmission, support across the router across the gateway, remote video transmission. D, stable and reliable performance, without staff management embedded Web server based on embedded computer technology, actually using embedded real-time multita

35、sking operating system, and video compression and Web function due to focus on a small size, within the device directly concatenation LAN or wan, namely that look, system insert real-time, stability, reliability greatly improved, also need not specially assigned management, which is very suitable fo

36、r unattended conditions. E, when the monitoring center needs to watch a video camera image, more network bandwidth will have certain requirements. The development of video monitoring system 1, video monitoring system development direction Video digitizing, front integration, network, system integrat

37、ion is monitoring the development of video monitoring system, and recognized the direction is the premise of digital network, network and system integration of video monitor based, so, the biggest two characteristics is the digital and network. 2, digital Digital is the 21st century features, is the

38、 information technology as the core, the necessity of the development of electronic technology, digital is toward growth pass, along with the time development, our environment will become more and more digital. Video surveillance system is the system of digital first should flow in video, audio, (in

39、cluding from analog state control, etc.) state, which to digital completely break "classic cable TV system based on camera imaging technology as the center" structure, fundamentally changing video monitoring system from information acquisition, data processing, transmission and system cont

40、rol of the mode and structural form. The flow of information digitization, coding compression, open video monitoring system, make agreements with the security system in other between each subsystem realize seamless connection, and the unified operation platform to realize the management and control

41、system integration, this also is the meaning. 3 and network Video monitoring system of the structure of the network will mean system by lumped type to distribution type system transition. Distribution type system USES the multi-layer hierarchical structure form and the real-time kernel technology wi

42、th micro multitask, multi-user, distributed operating system to achieve beat task scheduling algorithm fast response. Distributing type monitoring system of the hardware and software using the standardization, the modularization and the serialization of design, system equipment configuration has the

43、 versatility, openness, system configuration flexible, control the perfect function, data processing convenient, friendly man-machine interface and system installation, commissioning and maintenance simplify the operation of the system, are hot backup, fault-tolerant reliable, etc. System in some de

44、gree of networked broke on regional and equipment have been supervised extended geographical and quantity limits. System network will make the whole network system hardware and software resources sharing and mission and load of sharing, this also is an important concept of the system integration. Fr

45、om the above can see video technology, the development of video, roughly experienced analog video, network video PC in three phases, and depending on the technology of the network, communication and transmission platform.外文翻譯視頻監(jiān)控系統(tǒng)是安全防范系統(tǒng)的重要組成部分，是一種防范能力較強的綜合系統(tǒng)。視頻監(jiān)控以其直觀、方便、信息內(nèi)容豐富而廣泛應(yīng)用于許多場合。近年來，隨著現(xiàn)代科學(xué)

46、技術(shù)的不斷發(fā)展特別是網(wǎng)絡(luò)帶寬、計算機處理能力和存儲容量的迅速提高以及各種實用視頻信息處理技術(shù)的出現(xiàn)，視頻監(jiān)控技術(shù)也有長足的發(fā)展，視頻監(jiān)控進入了全數(shù)字化的網(wǎng)絡(luò)時代，日益受到人們的重視和關(guān)注。視頻監(jiān)控系統(tǒng)的發(fā)展基本上是從早期的模擬閉路電視監(jiān)控系統(tǒng)向數(shù)模結(jié)合的視頻監(jiān)控系統(tǒng)和現(xiàn)在的數(shù)字視頻監(jiān)控系統(tǒng)演變的過程，而現(xiàn)在的數(shù)字視頻監(jiān)控系統(tǒng)根據(jù)技術(shù)的發(fā)展又分為三個階段：數(shù)字監(jiān)控的多媒體階段、數(shù)字監(jiān)控的DVR階段和數(shù)字監(jiān)控的網(wǎng)絡(luò)階段。 1、模擬視頻監(jiān)控系統(tǒng) 模擬視頻監(jiān)控系統(tǒng)分為基于微處理器的視頻切換控制加PC機的多媒體管理和基于PC機實現(xiàn)對矩陣主機的切換控制及對系統(tǒng)的多媒體管理兩種類型。模擬閉路電視監(jiān)控系統(tǒng)實際

47、上就是許多模擬監(jiān)控設(shè)備的組合，系統(tǒng)主要由“前端設(shè)備”和“終端控制設(shè)備”以及“信號傳輸介質(zhì)”三個部分組成，其中：前端設(shè)備主要有攝像機、云臺、解碼器等，控制設(shè)備主要有切換矩陣、畫面分割器、監(jiān)視器、控制鍵盤、錄像機等。傳輸介質(zhì)包括電纜、控制線等。隨著微處理器、微機的功能、性能的增強和提高，多媒體技術(shù)的應(yīng)用，系統(tǒng)在功能、性能、可靠性、結(jié)構(gòu)方式等方面都發(fā)生了很大的變化，視頻監(jiān)控系統(tǒng)的構(gòu)成更加方便靈活、與其它技術(shù)系統(tǒng)的接口趨于規(guī)范，人機交互界面更為友好。但由于視頻監(jiān)控系統(tǒng)中信息流的形態(tài)沒有變，仍為模擬的視頻信號，系統(tǒng)的網(wǎng)絡(luò)結(jié)構(gòu)主要是一種單功能、單向、集總方式的信息采集網(wǎng)絡(luò)，因此系統(tǒng)盡管已發(fā)展到很高的水平，

48、已無太多潛力可挖，其局限性依然存在，要滿足更高的要求，數(shù)字化是必由之路。模擬監(jiān)控系統(tǒng)的主要缺點有：通常只適合于小范圍的區(qū)域監(jiān)控，模擬視頻信號的傳輸工具主要是同軸電纜，而同軸電纜傳輸模擬視頻信號的距離不大于1Km，雙絞線的距離更短，這就決定了模擬監(jiān)控只適合于單個大樓、小的居民區(qū)以及其它小范圍的場所。系統(tǒng)的擴展能力差 對于已經(jīng)建好的系統(tǒng)，如要增加新的監(jiān)控點，往往是牽一發(fā)而動全身，新的設(shè)備也很難添加到原有的系統(tǒng)之中。無法形成有效的報警聯(lián)動，由于各部分獨立運作，相互之間的控制協(xié)議很難互通，聯(lián)動只能在有限的范圍內(nèi)進行。 2、數(shù)字視頻監(jiān)控系統(tǒng) 隨著多媒體技術(shù)、視頻壓縮編碼技術(shù)、網(wǎng)絡(luò)通訊技術(shù)的發(fā)展、數(shù)字視頻

49、監(jiān)控系統(tǒng)迅速崛起，現(xiàn)今市場上有兩種數(shù)字視頻監(jiān)控系統(tǒng)類型，一種是以數(shù)字錄像設(shè)備為核心的視頻監(jiān)控系統(tǒng)，另一種是以嵌入式視頻Web服務(wù)器為核心的視頻監(jiān)控系統(tǒng)。數(shù)字視頻壓縮編碼技術(shù)日益成熟，計算機的普及化，為基于PC機的多媒體監(jiān)控創(chuàng)造了條件。這種新型視頻監(jiān)控系統(tǒng)的迅速崛起，部分地取代了以視頻矩陣圖像分割器、錄像機為核心，輔以其它傳送器的模擬視頻監(jiān)控模式，其優(yōu)越性主要表現(xiàn)在：PC機的多媒體監(jiān)控主機綜合了視頻矩陣、圖像分割器、錄像機等的眾多功能，使系統(tǒng)結(jié)構(gòu)大為簡化。由于采用計算機網(wǎng)絡(luò)技術(shù)，數(shù)字多媒體遠程網(wǎng)絡(luò)監(jiān)控不受距離限制。由于采用大容量磁盤陣列存盤器或光盤存儲器，可以節(jié)省大量的磁帶介質(zhì)，同時有利于系統(tǒng)實

50、現(xiàn)多媒體信息查詢。 但隨著基于PC機的視頻監(jiān)控錄像系統(tǒng)的發(fā)展，在實際工程使用過程中，也暴露出一些不足，主要是系統(tǒng)工作的不穩(wěn)定性?；赑C的視頻監(jiān)控錄像系統(tǒng)的組成結(jié)構(gòu)為：兼容/工控PC機+視頻采集卡+普通/較可靠的操作平臺+應(yīng)用軟件。從系統(tǒng)的組成結(jié)構(gòu)來分析：PC機用于24小時不間斷工作時，其性能是不很穩(wěn)定的，工控PC機相對兼容PC機的穩(wěn)定性有一個檔次上的提高，適用于較復(fù)雜的工作環(huán)境。操作系統(tǒng)：以Windows 98為操作平臺的系統(tǒng)，業(yè)內(nèi)人士都知道，Win98的穩(wěn)定性是有一定問題的，如果同時應(yīng)用軟件又不是很規(guī)范，這樣就容易在使用過程中出現(xiàn)工作不穩(wěn)定、死機等問題，而基于PC機的視頻監(jiān)控錄像系統(tǒng)其軟件

51、的實現(xiàn)是在Windows 95/98/NT、Unix、Linux等通用操作系統(tǒng)上，同時系統(tǒng)文件、應(yīng)用軟件和圖像文件都存儲在硬盤上，視頻處理必須高密度輸入大量數(shù)據(jù)，同時硬盤要進行多工工作，普通的硬盤邏輯（如Windows的FAT32）已無法適應(yīng)，以致極易產(chǎn)生系統(tǒng)的不穩(wěn)定性，造成死機現(xiàn)象。應(yīng)用軟件：采用簡易應(yīng)用軟件的系統(tǒng)是不能夠用于安防領(lǐng)域的，視頻監(jiān)控系統(tǒng)的應(yīng)用軟件能力上應(yīng)支持多任務(wù)并發(fā)處理，如監(jiān)視、錄像、回放、備份、報警、控制、遠程連接等的多工處理能力。視頻采集卡：視頻監(jiān)控錄像系統(tǒng)通常均為多路輸入系統(tǒng)，視頻采集卡可采用多卡方式，也可采用單卡方式。一般說，單卡方式集成度高，穩(wěn)定性會優(yōu)于多卡方式，很多采用一路一卡的方式很容易形成硬件沖突，其穩(wěn)定性會有較大的影響。 嵌入式系統(tǒng)是以應(yīng)用為中心，軟硬件可裁減的，適應(yīng)應(yīng)用系統(tǒng)對功能、可靠性、成本、體積等綜合性嚴(yán)格要求的專用計算機系統(tǒng)，亦即為監(jiān)控系統(tǒng)量體裁衣的專用計算機系統(tǒng)。 嵌入式系統(tǒng)主要由嵌入式處理器、相關(guān)支撐硬件、嵌入式操作系統(tǒng)及應(yīng)用軟件系統(tǒng)等組成，它是集軟硬件于一體的可獨立工作的"器件"。嵌入式