Ten misunderstandings of IP network video surveillance technology

1. What is IP video surveillance (IP-Surveillance)?

IP is the abbreviation of Internet Protocol (Internet Protocol), which is the most commonly used protocol when communicating with the Internet through a computer network. IP video surveillance system (also known as network video surveillance system) can digitize video information and transmit it through wired or wireless IP network. This allows real-time monitoring and recording functions to be extended to all places with network connections, and also enables such systems to be seamlessly integrated with other security systems (such as access control systems, etc.).

The IP surveillance solution can be composed entirely of network cameras, it can also be composed of analog cameras and video servers, or a combination of both. Either way, IP surveillance has proven to be a very attractive solution in various industries. In countless industry applications, this revolutionary technology is gradually replacing traditional monitoring systems to reduce costs and improve safety. At the same time in other application areas, it is also beginning to be used to create and stimulate the formation of new markets.

2. Why is there a misunderstanding of IP monitoring technology?

In fact, IP surveillance technology is not a highly complex technology, but the part belonging to the category of "IP" has broken through the traditional security concept and entered a field that most traditional security practitioners are very unfamiliar with-IT field. From this point of view, this new technology and its new application environment will inevitably lead to fear and stimulate support for maintaining the status quo. The emergence of IP surveillance has created a situation of direct competition with DVR. This situation has brought a series of disputes. One of them is that it poses a serious challenge to an industry-recognized point of view. This view believes that DVR technology combined with analog cameras It is the ultimate solution of video surveillance system, so it is the best video surveillance technology. After a careful analysis, it is not difficult to distinguish between right and wrong: First of all, in the current security industry, from manufacturers to engineers, system integrators, to end users and their institutions, they are already familiar with DVR and analog camera technology. They have invested a lot of money, and of course they are happy to see DVR become the leading product in the market to consolidate their vested interests. Secondly, the inherent closedness of the traditional security industry and the prevalence of private technologies and single-brand solutions further diffuse "rumors" that are not conducive to IP surveillance in the market. In stark contrast, the IP surveillance solution integrates the best products and services from various vendors, and the result it brings is the maximization of the end user ’s benefits, but this result is in line with the current market environment. Very different from market expectations.

So far, we have understood why there are many misunderstandings about IP surveillance in the market, and have initially discussed some of the facts about IP surveillance. Next, we will further analyze some of the widely spread misconceptions in the market.

3. Ten misunderstandings about IP video surveillance

At present, there are many misunderstandings about IP video surveillance technology in the market. Here, we have selected 10 of the most common views and divided them into two categories: non-technical and technical. We will first analyze the misunderstandings that are not related to technology, and then further discuss those technical related topics.

Misconception 1: DVR is the latest and most powerful CCTV security technology

Fact: Not only do some people think that digital hard disk recorders (DVRs) are the latest and greatest technology, but others mistakenly believe that DVRs are already completely digital and networked technologies-in fact, it is not.

Compared with traditional video cassette recorders (VCRs), DVR does have many advantages, such as: no need to change the tape, consistent image quality and fast search function. But you still can't get rid of the complicated analog video cables, they will greatly reduce the image quality and increase the cost of the entire system. IP surveillance not only has all the advantages of the above DVR, but also has more advantages that DVR does not have, such as:

Scalability: In the IP surveillance system, there is no limit like the DVR that must expand the system at a scale of 16 channels at a time. Users can expand their system from including one camera to including only one at a time. Thousands of cameras. At the same time, it also allows users to freely choose any camera and its frame rate without any restrictions on time or frame rate.

More cost-effective infrastructure: In many cases, most of the user ’s original equipment has been connected through the IP network, so no additional wiring work is required to build the IP monitoring system (wiring cost is usually one of the main construction costs of the CCTV system ). In this case, the user's data, video, audio and other information will be transmitted and managed through the same network, so that the management of the entire system becomes more cost-effective.

Remote access: Users can access and control all video information in any corner of the world through wired or wireless networks, whether it is a real-time video stream or recorded video data.

Intelligent camera: The network camera has a series of built-in intelligent functions, including motion detection, event processing, sensor input, relay output, time and date, etc. These functions enable the camera to make intelligent decisions according to monitoring requirements, so that it can The correct alarm information is sent to the correct recipient at the correct time, and the video information can be sent to the specified user at the specified time according to the specified frame rate and resolution.

Lower system construction costs: It has been proven that IP surveillance systems are a lower cost option for many video surveillance projects. IP surveillance solutions can use open, standardized networks, servers, and storage devices, which allows users to make more cost-effective choices from more suppliers, while most DVR solutions put users under a single Or a few suppliers. In addition to the above factors in hardware selection, the IP monitoring system also has lower installation and maintenance costs and higher performance advantages, all of which clearly indicate that the IP monitoring system will save users considerable construction costs.

It can be seen from this that DVR is not a final solution as most people think, but only one of the milestones in the development of CCTV technology. After further careful evaluation of the market, it is not difficult to find that DVR actually represents those outdated, "black box" solutions, and IP surveillance soon proved to be a newer and more advantageous advantage than DVR technology. In fact, there are numerous differences between IP surveillance systems and DVRs, and the current market is just becoming aware of this.

Misconception 2: IP technology is an immature technology. If it is more advantageous, why have security solution providers failed to achieve more relevant sales?

Fact: The problem touched by this misunderstanding is to a greater extent related to the structure and purchasing habits of the current security market, not to the performance and reliability of the IP surveillance system.

IP surveillance is a relatively new technology, and many existing and powerful security companies have a set of DVR solutions that compete directly with them. They want to protect their existing DVR-oriented solutions. Very natural thing. In addition, for any new technology and new thinking, in order to replace the original thinking mode and behavior mode, it is necessary to first build relevant Knowledge background and necessary infrastructure, these preparations require a certain amount of time to complete. I believe that few people will remember that in the era of the prevalence of typewriters, we used to think that this kind of machine was completely enough for us to do word processing work, and did not need those quirky word processing software at all. It's too long? Then think about those old cassette recorders (VCRs). Have you been investigating it for a long time before replacing it with the now popular DVD player? Even you still use it today ? Obviously, the replacement of old and new technology takes a certain amount of time to complete.

The truth behind the misunderstanding is that the number of engineering projects using IP monitoring technology is growing rapidly, and the number of system integrators and distributors involved in IP monitoring is also increasing. It won't take long for the security market to truly realize the superiority of the IP surveillance technology. After that, the IP surveillance system will be rapidly promoted and adopted, and at the same time, more infrastructure will provide strong support for it.

If you think these facts are not very convincing, then let ’s take a look at the attitude of some industry giants towards IP surveillance: IBM has entered the networked security market, and Cisco and Proxim are also working hard on IP video Monitor the market for guidance and education. At this point, I believe we no longer need more arguments.

Misunderstanding 3: IP monitoring solutions cannot meet the actual requirements of enterprise-level security applications.

Fact: The larger the scale of the system and the higher the performance required, the stronger the competitive advantage of the IP monitoring solution.

Among the advantages of the IP surveillance system summarized above, scalability is one of the most prominent advantages recognized by all high-end users. Systems containing more than 200 to 300 cameras are common engineering projects for Axis, and some systems even include thousands of network cameras. Among these systems, some are used in some places with high safety requirements, such as international airports and prisons. Therefore, this misunderstanding is easy to clarify: the fact proves that the IP surveillance system is fully capable of enterprise-level security applications. In fact, we have seen that some large-scale government and airport video surveillance application systems designate IP surveillance solutions as the preferred solution, and this phenomenon never occurred a year or two ago.

Misconception 4: Networked video image quality is not as good as analog image quality.

Fact: High-performance network cameras use the same quality image sensor (CCD) and optical components as high-end analog cameras. In addition, by using a video server, professional analog cameras or already installed analog cameras can be easily integrated into the IP surveillance system. When comparing network cameras and analog cameras, it is important to note that the network cameras mentioned here refer to professional-grade products used for video surveillance, not those low-end cameras used for video chat, those cameras and fully functional networks The cameras cannot be compared.

In the near future, network cameras and IP surveillance technologies will generally support megapixel resolution, which can provide super image quality. The analog camera is always subject to the NTSC / PAL standard, which limits its maximum resolution to about 400,000 pixels.

Misunderstanding 5: Network cameras are more expensive than analog cameras, making the construction cost of IP surveillance systems very expensive.

Fact: The price of network cameras is indeed higher than that of analog cameras with comparable performance. This is because it integrates more advanced functional features than analog cameras, such as information digitization, image compression, and other intelligent features. If you analyze the overall hardware cost of the system (including cameras, cables, and video storage, etc.), you will find that the hardware cost of the IP surveillance system is usually equivalent to the hardware cost of the DVR-based surveillance system. After considering the system installation cost, The advantages of the monitoring system are obvious, because the cost of building an IP-based infrastructure is much less than building a coaxial cable-based infrastructure. In addition, if PTZ control is required, the analog system must also build additional control lines, while the IP monitoring system has no such additional expenditure. Power over Ethernet (PoE, PoweroverEthernet) technology is another advantage of the IP surveillance system that can effectively save construction costs. This technology allows the network camera to receive working power and data through the same network cable at the same time, so that users can save special It is used for the wiring cost required for equipment power supply, and can be used in conjunction with an uninterruptible power supply (UPS) to further improve the reliability of the system.

Misunderstanding 6: If a large number of analog cameras have been installed, users can no longer use IP surveillance technology, but can only use DVR.

Fact: Perhaps DVR vendors very much hope that users believe this, but VideoServer technology can effectively counter this misunderstanding. Leading IP surveillance vendors can provide users with mature video server products, and their costs are within a reasonable range. The video server can convert the analog video signal into a digital video stream that can be transmitted through the network, thereby converting an analog camera into a network camera with basic functions. At present, most IP surveillance systems incorporate analog cameras that are networked through video servers and network cameras in the true sense. Existing analog systems and devices will not impede users from adopting advanced IP surveillance technologies.

So far, we have clarified some misunderstandings about IP monitoring systems that are often heard, and they are all non-technical related topics. Next, let us further analyze the technical misunderstandings thoroughly.

Misunderstanding 7: Transmitting all these video data through the network will inevitably cause network overload, so this technology is actually not feasible.

Fact: A single network camera usually occupies only 0.2 to 2Mbps of bandwidth. The actual bandwidth usage depends on the image compression level, image size, and frame rate. If there are only a few network cameras in the system, the existing 100M office network can already fully meet the requirements of video data transmission. For systems containing more network cameras and video servers, we recommend that users open up dedicated networks for video data. Just like railway transportation, once the existing railway is congested, it is only necessary to build some new rails. For enterprise-level applications, the core network can usually reach gigabit capacity. With the support of existing switches and routers, users can easily divide network bandwidth resources to reserve dedicated bandwidth resources for video applications. . In addition, some special configurations can be adopted to ensure that the network camera does not occupy excessive bandwidth resources when integrated into the enterprise network.

On the other hand, the network camera itself is intelligent. It can independently determine the frame rate and resolution used to send video streams over the network according to different times, events, or picture activities. Therefore, in most cases, the camera will only use 10% of the time to send those video information worth recording and archiving, while the remaining 90% of the time, no data will be transmitted through the network.

Misunderstanding 8: It is not safe to transmit important video information through the IP network.

Fact: Although the Internet is mainly used to transmit some public information, as long as the correct network security measures (such as firewall, VPN, and password protection, etc.) are adopted, it can also be used to carry out some sensitive business with high security requirements. As we all know, many banks and financial institutions often use the Internet to carry out various types of financial services around the world. For video surveillance applications with relatively low security requirements, the Internet can obviously also be a reliable carrier medium. Corresponding to this, the analog surveillance system cannot use any security encryption or authentication mechanism. Anyone can easily obtain the video information transmitted on the line by taking the wire, and even send the false video information that they have forged to the monitoring center. On the monitor, which makes the video surveillance system completely ineffective (just like the plot in many movies). This situation cannot happen in an IP monitoring system that uses effective security measures.

Misunderstanding 9: The reliability of IP monitoring technology is not as high as other technologies. For example, when the network is down, the system cannot continue to work.

Fact: As early as the 60s and 70s of the last century, when the IP network infrastructure was first developed, how to ensure the redundancy of the network has become the primary factor that must be considered when constructing an IP network. With the development of IP network technology, the transmission links, application servers, storage devices, and switching and routing devices used in the network can be configured with backup resources. When the main link or the main device fails, the backup link and the device can still be used. Maintain the normal operation of the system. In IP network-based systems, storage devices can be deployed in remote, secure locations, servers can use backup power, and the system can use hot-plug RAID hard drives, self-healing storage, and dual network cards to ensure reliability . Although for small network systems, all the above security measures may not be adopted, but solutions based on high-quality IT components will in any case be more reliable than traditional CCTV or DVR solutions. In addition, due to the use of standard servers and network equipment, the time and cost required to replace faulty equipment for the IP monitoring system will be much lower than that of a closed DVR system.

Misunderstanding 10: The popularity of IP surveillance will take at least 5 years.

Fact: This is undoubtedly the biggest misunderstanding! Since Axis launched the world's first network camera in 1996, more than 500,000 such "future" products of this kind have been sold around the world. The attention and demand of the monitoring system are increasing day by day. Whether it is measured from the system's overall cost, overall performance, reliability, or other standards, the IP monitoring system has proved to be a mature solution now. With the continuous improvement and popularization of IP surveillance technology, IP surveillance systems will also become the main force in the future security market.

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