NVR网络视频录像机究竟比普通DVR硬盘录像机有何优势呢?我们做个比较：
1、部署与扩容传统嵌入式DVR系统为模拟前端，监控点与中心DVR之间采用模拟方式互联，因受到传输距离以及模拟信号损失的影响，监控点的位置也存在很大的局限性，无法实现远程部署;而NVR作为全网络化架构的视频监控系统，监控点设备与NVR之间可以通过任意IP网络互联，因此，监控点可以位于网络的任意位置，不会受到地域的限制。
2、布线DVR由于采用模拟前端，中心到每个监控点都需要布设视频线、音频线、报警线、控制线等诸多线路，这么多线路，些微的闪失，都需要人工一条一条进行排查，因此布线的工作量相当繁琐，并且，工程规模越大则工作量越大，布线成本也越高;而在NVR系统中，中心点与监控点都只需一条网线即可进行连接，免去了上述包括视频线、音频线等在内的所有繁琐线路，成本的降低也就自然而然了。
3、即插即用长期以来，包括NVR在内的网络产品，因罩着网络这层神秘面纱――要设IP地址，要操作复杂的管理后台等等，一直让大部分工程商“望而生却”。说这些不是抱怨什么，客观的说，行业最初的准入门槛的确不高，希望在短期内实现行业从业人员素质的整体大幅提高本来就是美好的幻想。伴随技术的演进，如今使用NVR只需接上网线、打开电源，系统会自动搜索IP前端、自动分配IP地址、自动显示多画面，在安装设置方面我们不能说满话，不说优于DVR，但至少是旗鼓相当了。
What are the advantages of video video recorder over DVR? Let's make a comparison:
1, deployment, and expands the traditional embedded DVR system for analog front end, and the center point to point using simulation interconnection between DVR, because is affected by the transmission distance and the analog signal loss, the location of the point to point there are a lot of limitations, unable to realize remote deployment; NVR as the network architecture of video monitoring system, equipment and point to point by any IP network interconnection between NVR, therefore, can point to point in the network of arbitrary position, is not subject to geographical restrictions.
2, wiring DVRS with analog front end, the center to each point needs to deploy video line, audio line, alarm line, control line and other lines, so many lines, minor mishap, all need a artificial one of illness, so wiring workload is quite complicated, and the project scale, the greater the workload, the greater the wiring cost is higher; In the NVR system, central point and monitoring points are just an Internet connection can be made, from the above, including video line, audio line, etc, all of the red line, cost reduction is naturally.
3, plug and play for a long time, including NVR, network products, due to cover the network the veil of mystery, to set the IP address, to the management of the complex background and so on, has been to most of the engineering contractor "hope and life". Say these are not complain about what, objectively speaking, the industry first entry is not high, hope to achieve in the short term industry practitioners quality overall increase is fantasy. Along with the evolution of technology, now use the NVR connected to cable, open the power supply, the system will automatically search IP front-end, automatically assign IP addresses, automatic display picture more, we cannot say with words in installation Settings, not better than that of the DVR, but at least is on a par.
4、录像存储DVR多年来即使是网络“大行其道”今天依然广受用户欢迎的一个重要原因就是它拥有强大的录像、存储功能，但是这一性能的发挥仍旧受制于其模拟前端：DVR无法实现前端存储，一旦中心设备或线路出现故障，录像资料就无从获取了;NVR产品及系统可以支持中心存储、前端存储以及客户端存储三种存储方式，并能实现中心与前端互为备份，一旦因故导致中心不能录像时，系统会自动转由前端录像并存储;在存储的容量上，NVR也装置了大容量硬盘，并设硬盘接口、网络接口、USB接口，可满足海量的存储需求。
5、安全性随着网络的逐渐普及，伴之而生的信息安全问题也成了不可回避的现实，网络产品长期以来被认为有安全隐患。然而，在网络监控系统中，一旦通过使用AES码流加密、用户认证和授权等这些手段来确保安全，网络监控产品源于网络的安全隐忧就完全消除了，目前，NVR产品及系统已经可以实现这些保障;而相比之下，DVR模拟前端传输的音频、视频裸信号，没有任何加密机制，很容易被非法截获，而一旦被截获则很轻易就被显示出来。
4, video storage DVR for many years even the "popular" is still popular with users today is an important reason why it has a great video, storage function, but the play is still subject to the performance of the analog front end: DVR cannot achieve front storage, once the center of a device or circuit malfunction, cannot get the video data; NVR products and systems can support center storage, storage of front end and the client three storage mode, and can realize the center and the front end as backup, once the reason lead to center can't video, the system will automatically turn by the front-end video and storage; In terms of storage capacity, NVR is also equipped with a large-capacity hard disk, and equipped with a hard disk interface, network interface and USB interface, which can meet a large number of storage requirements.
5. With the gradual popularization of network security, the accompanying information security problem has become an unavoidable reality. Network products have long been considered to have security risks. In network monitoring systems, however, once the code flow by using AES encryption, the means such as user authentication and authorization to ensure security, network monitoring products is the result of the network, is completely eliminate safety concerns, at present, the NVR products and systems have been able to achieve these security; By contrast, DVR simulates the audio and video naked signals transmitted from the front end. Without any encryption mechanism, it is easy to be illegally intercepted. Once intercepted, it is easy to be displayed.
6、管理NVR监控系统的全网管理应当说是其一大亮点，它能实现传输线路、传输网络以及所有IP前端的全程监测和集中管理，包括设备状态的监测和参数的浏览;而DVR同样又是因其中心到前端为模拟传输，从而无法实现传输线路以及前端设备的实时监测和集中管理，前端或线路有故障时，要查实具体原因非常不便。
7、图像质量NVR本地监控图像在清晰度上与DVR无异，但由于NVR在监控点就实现了数字化，不会因为传输损耗导致图像质量降低，因此NVR远程监控的图像质量比DVR要好。
8、安装维护DVR的安装设置简单，无需复杂的配置，这是其一大优势;而NVR同样如此，甚至更便捷——中心NVR设备和远端监控点IP前端设备仅需插上网线、打开电源，接下来所有流程均可自动完成，包括自动搜索所有前端设备、自动为前端设备分配IP地址、利用NVR外接的显示设备自动多画面显示所有监控点图像。
6, NVR monitoring system of the entire network management should be one big bright spot, it can realize IP transmission lines, transmission network, and all the front-end monitoring and centralized management in the whole process, including equipment state monitoring and parameters of browsing; The DVR also is due to its center to the front for analog transmission, to realize the transmission lines as well as the real-time monitoring and centralized management of the front-end equipment, front or line failure, to verify the specific reason is very inconvenient.
7, image quality NVR local monitoring image in clarity and DVR, but due to the NVR on the monitory point to realize the digitization, not because the transmission loss results in the decrease of image quality, so the NVR remote monitoring of the image quality is better than DVR.
8. Simple installation and maintenance of DVR without complex configuration, which is one of the major advantages; And NVR too, even more convenient - center NVR equipment and the remote IP front-end equipment only on cable, turned on the power point to point, then all the process can be done automatically, including automatic search all the front-end equipment, automatically assign IP addresses for front-end equipment, multi images showed an external display device using the NVR all image point to point.
