Restricting the Development of Network Monitoring in 2010

Inventorying In 2010, from the technical perspective, it is not difficult for us to find that the major trends of digitalization, networking, high-definition, intelligence, and integration have been pushed forward in this year. Digitization is the basis of these five major technological changes, and around digitalization, high-definition, networking, intelligence, and integration have begun to multiply. This article focuses on the trend of video surveillance network in 2010.

Since 2006, with the continuous development of network technologies and information processing technologies, remote video surveillance systems based on Web servers have risen dramatically and the video surveillance industry has entered the era of networking. For remote monitoring, the network video surveillance monitoring method is more flexible, and network-based video surveillance breaks the time and geographical constraints, eliminating the need for traditional wiring and line maintenance costs, reducing monitoring costs; users authorized Under the circumstances, monitoring can be performed on demand at any time to achieve plug-in, ready-to-use, and ready-to-use. For a while, online video surveillance became a topic of conversation.

Huanyu Fei, general manager of Iron Man, once said that the online video surveillance in 2009 was only in the marketing stage. We were faced with the relish of manufacturers and users waved their hands to say “no”. By this year, users began to pay attention to How to use the situation, that is, network video surveillance began to enter our lives.

Although network video surveillance is close to us, the problem is that in practical applications, we have found a variety of unsatisfactory problems, such as network transmission problems, such as system compatibility issues, such as security issues, with With the promotion of online video surveillance applications, these contradictions have become increasingly prominent.

We know that a networked video surveillance system includes video encoders, storage devices, network devices, and monitoring software in addition to the front-end cameras. In many products, it is necessary to ensure the interconnection and interoperability of products from different vendors. Transmission, and at the same time avoiding the user being "stuck" by a vendor's product, the formulation of relevant standards is particularly important. Nowadays, China's surveillance market is in a state of no standard, and the market is basically monopolized by several big brand manufacturers.

Suzhou Keda Liu Zhiqiang once said, “Standards have become a shortcoming in the security industry. With the popularity of networking, this short board problem has become more and more serious. Due to the lack of standards, the images of different systems cannot be shared and shared. The images of different manufacturers cannot be interconnected and shared, and it is very difficult to expand and maintain the capacity in the later period, and the development of upper-layer applications is faced with a large amount of development costs.Standardization is of great significance for the development of network video surveillance because past analog and DVR digital surveillance products are due to the lack of uniformity. Industry standards, which make the manufacturers separate, each manufacturer has adopted its own standards, so that after entering the era of networking, users face obstacles when monitoring systems networking and many other core requirements.” Not only Liu Zhiqiang has such feelings, security industry Many people also face such confusion.

At present, there are many standards-related organizations in the field of security monitoring. Some are regional, some are governmental, and some are standard organizations under a large project. However, they are not widely recognized and are not binding. . However, the good news is that certain standards initiated by important companies that occupy the mainstream of the video surveillance market have been supported by more and more security vendors, integrators and distributors, and have become more influential in the security industry. Industry standards such as the ONVIF standard, PSIA standard, and HDcctv alliance. According to a survey conducted by IMS Research, members of ONVIF currently occupy 72% of the market, and have many member companies in North America, Europe and Asia. As of May 2010, ONVIF has more than 150 members.

Another example is the problem of network transmission. The network video surveillance system based on the Internet has ended its closed historical system. The open network has also brought the video surveillance system into the trouble it never encountered: the impact of network bandwidth, remote video The effect of monitoring is not satisfactory. To this end, the network camera video codec technology field also began a new round of revolution in 2010, H. 264 has begun to gain popularity with its high compression ratio and the advantage of having high quality and smooth images. "If the video encoding of the webcam is not even H.264 or MPEG-4, then it's impossible to say." When this kind of voice began to sound in our ears, we knew that network video surveillance had taken another new step. Steps.

The existing network infrastructure cannot be changed in one day. To achieve the goal of remote monitoring, another enterprise has begun to use its brains in the network transmission bandwidth. Therefore, the dual-stream technology emerged. Dual stream technology uses a high bit rate stream for local HD storage, such as QCIF/CIF/D1 encoding, and a low bit rate stream for network transmission, such as QCIF/CIF encoding, taking into account local storage and remote networks. transmission. In this case, dual-stream technology can achieve two different bandwidth streams, local transmission and long-distance transmission. Local transmission can use high-stream to obtain higher-definition video storage, and remote transmission can use lower-rate streams. Adapt to various networks such as CDMA/ADSL for higher image fluency.

It should be said that dual-streaming is a speed-up for network video surveillance. This type of creatively expands the application of dual-streaming and implements arbitrary code stream format selection and coding technology, enabling hundreds of thousands of cameras to be produced in large-scale video surveillance systems. Massive video, audio, storage, alarm, and management data can ensure the stable operation of the transmission system when the user can obtain limited network resources.

At present, the dual-stream technology in the field of video surveillance has been developed to high-definition dual-stream, and dual-stream technology supporting 720P (1280*720, 30fps) + Full D1 (720*480, 30fps) has become mainstream technology and is used in certain applications. Manufacturers of HD Network Cameras and HD Network Video Encoders.

In 2010, wireless video surveillance as a supplement to wired network video surveillance began to penetrate the civilian market. China Telecom’s “Global Eye” and China Unicom’s “wide horizon” have begun to bring more rapid development and a broader market for networked surveillance. With the commercialization of 3G, wireless video surveillance has begun to get rid of the obstacles of transmission bandwidth, which has greatly promoted the further penetration and popularization of video surveillance services in the civilian market.