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According to surveys, the vast majority of security users have high-definition monitoring requirements, and how can they achieve high-definition, high-definition monitoring is divided into what kind but completely unknown. Whether it is the security industry application, safe city or home monitoring, high-definition monitoring adopts different methods for different fields. Due to the difference in system cost and equipment, the HD effects are not the same.
According to industry insiders, the current HD-SDI HD and IP high-definition surveillance are at the infighting stage. What happens to these two HD market disputes?
With such questions, the author visited Shenzhen Zhongxin Technology Co., Ltd. (hereinafter referred to as Zhongxin) and the United States Camus International Co., Ltd. (hereinafter referred to as “Camusâ€).
HD-SDI HD is just a transitional product?
In the past two years, with the development of HD-SDI technology and the maturity of HD-SDI's camera products, HDcctv has completely reached the high definition standard defined by broadcast standards. Under the stimulation of many contradictions and mature technology conditions, HD-SDI high-definition monitoring came into being. However, HD-SDI high-definition monitoring has many bottlenecks for market demand and technological development.
1) HD-SDI is limited in transmission distance As we all know, HD-SDI high-definition monitoring is based on the traditional monitoring, change the local device, the signal is not compressed, using DVI, HDMI, HD-SDI and other transmission modes. The limitation of the transmission mode has caused SDI video surveillance to be greatly limited in transmission distance.
IP high-definition monitoring, that is, network high-definition is to overturn the traditional analog monitoring system, video high-definition encoding and IP encapsulation, through the IP network to carry high-definition images to achieve high-definition surveillance, video surveillance and other monitoring functions. IP monitoring uses network transmission, so it has a great advantage in transmission distance.
2) HD-SDI has flaws in resolution and high-definition technology. During the interview, Wu Yonghua, director of marketing at Zhongxin, said that HD-SDI is not only limited in transmission distance, but also has a certain degree of resolution and high-definition technology. defect.
According to investigations, currently on the market intelligent surveillance and detection cameras, for the purpose of identification and intelligent applications, high-pixel cameras have begun to dominate the market, and HD-SDI as a non-compressed high-definition video transmission standard in these large-resolution cameras There are inevitable birth defects in the application.
At present, the IP network HD camera has a resolution of 2 million. However, in order to save resources, HD-SDI HD adopts a conservative route and adopts an ordinary analog system, which cannot be matched with other applications on the back-end and cannot be used for secondary development. , so there are certain limitations in high-definition technology.
In this regard, Commodity Product Engineer Peng Hao also said that the high-definition network accounted for most of the market, HD-SDI is the only new product that has emerged in the past two years. The limitations and cost of its own technical investment have led to its development prospects.
3) HD-SDI vs. IP High-Definition Price High-professionals say that HD-SDI high-definition video signals can best be transmitted on dedicated SDI cables to ensure the best performance of video signals, but dedicated SDI cables include connectors. expensive. In actual projects, the use of dedicated SDI cables will increase construction costs. After actual testing, the use of a slightly inferior coaxial cable and a BNC head cannot guarantee the video effect, and the use of an optical transceiver is more expensive.
In the IP high-definition monitoring, the use of standard Ethernet networking, only need to be based on the number of ways, bandwidth equipped with commonly used Ethernet switches can be. Currently, the right Ethernet switch can be selected with the scale of the network. In addition, when a remote optical fiber is transmitted, a very inexpensive fiber transceiver can also be used, and a wireless bridge can also be used for remote wireless transmission, which is convenient and practical.
In summary, the development of HD-SDI HD is subject to many restrictions. For the current security market, it can only be a transitional product. As a result, the IP network high-definition monitoring market environment and development prospects are relatively good.
The rise of high-definition IP networks is just around the corner 1) The main reason for the slow development of high-definition IP networks Experts say that the problems of large delays, codec loss, and high bandwidth of network cameras have not been well resolved, and the development of network monitoring has been slow. In the first two years, there were people who once said "no network, no HD".
It is understood that the market for IP cameras is different from that of analog cameras. The networking of analog cameras is simple, and many system integrators and contractors have sophisticated and complete system solutions. For the IP network camera, because the system solution involves many problems such as network transmission, network planning, video storage, image forwarding, image wall display, and so on, the higher technology is also proposed for manufacturers, system integrators, and engineering companies. Claim.
According to the director of Zhong Xin Xin Wu, when contractors involved in IP network HD, it was obvious that they had technical problems. In the past, engineers only needed to install terminal equipment and learn about external technologies such as cabling. Today, network HD not only requires external device technology, but also has high requirements for built-in software technology.
Director Zhong Xin-wu also stated that the immaturity of the technology of network high-definition surveillance itself is a factor that restricts its development. In fact, the improvement of the requirements of the engineering companies is also an important reason that the high-definition network cannot develop rapidly.
2) Current development of high-definition IP networks It is understood that, based on the application of high-definition monitoring systems based on IP networks, single-channel video streams can be flexibly controlled and can be controlled at 500kbps~3Mbps, and can rely entirely on Ethernet technology for several decades. It is quite mature, and it can flexibly design and plan networks for different network sizes. The application of optical communication technology in engineering has become very popular and very mature. It is easy to build large networks and can be accessed with other systems.
Compared with uncompressed HD-SDI audio and video signals, it brings enormous pressure to transmission and storage terminals. IP network high-definition monitoring will continue to advance with the continuous development of network communication technologies in the past two years, and the continuous development of high and new technologies will also enter the market. A new milestone.
For the current status of IP network high-definition surveillance development, Director Zhong Xin Xinwu stated that although the current network HD is still at a low point and the technology is not mature enough, with the development of domestic high-speed optical fiber and even the popularity of 4G networks, all analog video surveillance will To network. For this purpose, Zhongyu Xin concentrates all its efforts on research and development of network HD, and strives to lead the network to the forefront of HD.
Different from the development of Zhongxin, Peng Hao, a product engineer at Camus, stated that the company is currently developing in two aspects. On the one hand, it follows the market demand for R&D, production, and sales of analog HD products such as HD-SDI. On the one hand, it matches the development of high-end markets. IP Network HD is also a trend of product development.
The increasing demand for high-definition IP network market survey shows that through years of market development, the concept of networking has been accepted and recognized by numerous system integrators and end users. According to statistics, in 2008, the domestic network camera market accounted for about 4% of the Chinese camera market, reaching 520 million yuan. In 2009, the network camera market grew by about 100% year-on-year, and its market size was about 1 billion yuan. From 2008 to 2010, the market share of network cameras has grown at an average rate of 70%. In the first half of 2011, the ratio of camera project applications has increased to about 23%.
In this regard, Camus product engineer Peng Hao said that the current high-definition market is very large, including the demand for network high-definition market is also growing, such as airports, banks, factory monitoring, safe cities, buildings and other high-end government projects require network HD . Although the network HD is relatively high cost, but the overall price of network HD is not higher than the simulation, which is also an advantage of the development of high-definition network.
Director Zhong Xin-hsiu also stated that large-scale enterprises are involved in analog HD and network HD, because the analog HD technology is very mature, and all the analog HD is just different shells, and anyone can do it. However, high-end engineering units such as banks and factories require high-definition, so the current high-definition network market is in short supply.
Conclusion:
With regard to the current security market, the competition between HD-SDI HD and network HD is self-evident. The products and design concepts required for the complete system are also very different. In the field of high-definition surveillance applications, there is an irreconcilable contradiction. HD-SDI high-definition digital surveillance cited from broadcasting and television has limitations in all aspects. Although IP network high-definition monitoring is still in the growth stage, with the continuous improvement of the network environment, especially the governments at all levels in China have upgraded the network. The plan will further expand IP surveillance to larger market applications. IP network high-definition surveillance will also have unpredictable explosive growth. 
As the main force of the security industry, video surveillance has become diversified with the rapid development of the security industry, and it has obviously become a new trend in video surveillance.
Release date:2012/4/23 9:03:29