To date, IP-based video surveillance systems have been around for nearly 10 years. During this period, IP surveillance solutions used practical facts to crush some of the erroneous ideas that have long revolved around online video surveillance.
1. What is IP-Surveillance?
IP is an abbreviation for Internet Protocol. It is the most commonly used protocol for communicating through a computer network and the Internet. IP video surveillance systems (also known as network video surveillance systems) can digitize video information and transmit it over wired or wireless IP networks. This allows real-time monitoring and recording capabilities to be extended to all locations with network connectivity, while also allowing such systems to be seamlessly integrated with other security systems such as access control systems.
According to well-known industry analyst JP Freeman and his company's analysis, there are more than 20 million analog cameras installed in the United States alone. Of the 20 million units, more than 15 million were sold in 2002. These figures are sufficient to illustrate the extent of analog cameras selling, but despite this, the network cameras stand out from the market and become the fastest growing category of video surveillance products. Network cameras can be directly connected to an IP network and integrated with other applications on the network, allowing users to install cameras at remote locations, view, store, and analyze real-time video at one or more locations via the internal network or the Internet. data. According to another well-known industry analyst company, Frost & Sullivan, the annual growth rate of sales of traditional CCTV products is only about 10% from 2005 to 2010, and the market capacity will reach saturation in 2008; while sales of network video products over the same period The annual growth rate will reach about 40%, even though there is still room for growth by 2010. It is not difficult to foresee that, as the concept of digitalization becomes more and more popular, it will certainly replace analog products in the near future.
The IP surveillance solution can be entirely composed of a network camera, an analog camera plus a video server, or a mixture of both. Regardless of the form used, IP monitoring has proven to be an attractive solution in a variety of industries. In countless industrial applications, this revolutionary technology is gradually replacing the traditional monitoring system to reduce costs and improve safety. At the same time, in other fields of application, it is also beginning to be used to initiate and stimulate the formation of new markets.
Powerful scalability is one of the major advantages of IP surveillance systems, which makes it recognized as an attractive technology that is not only suitable for improving and perfecting existing video surveillance and remote monitoring systems, but also very suitable for some New industry applications, including:
Education: Remote monitoring of the school's playground, corridors, halls and classrooms, as well as monitoring of some buildings;
Transportation: remote monitoring of the safety of railway stations, railway tracks, highways, and airports;
Banks: bank security monitoring on main streets, branch monitoring and monitoring of ATMs;
Government: Security and surveillance applications, usually integrated into existing systems;
Retail: Used for security and remote monitoring, effectively simplifying store management and improving work efficiency. Industrial: Used to monitor production processes, logistics systems, warehouses, and inventory management. 2. Why is there a misunderstanding of IP monitoring technology?
For any new technology, from its emergence to widespread application, it will inevitably undergo a market education stage. The more complex the new technologies are, the more entrenched the original technology and business models are, the longer the education period of this market will last. In this process, some knowledge gaps and misunderstandings are commonplace. It is in this environment that some misconceptions and confusion surrounding new technologies will continue to breed and spread.
In fact, IP monitoring technology is not a highly complex technology, but the part that belongs to the “IP†category has broken through the traditional security concept and entered a field that is unfamiliar to most traditional security practitioners. 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. When IP surveillance emerged, it formed a direct competition with DVR. This situation brought a series of disputes. One of them is that it poses a serious challenge to an industry-recognized viewpoint. This view points out that DVR technology combines analog cameras. It is the ultimate solution for video surveillance systems and is therefore the best video surveillance technology. Careful analysis, it is not difficult to tell what is wrong: First of all, the current security industry from the manufacturer to the project, system integrators, and then the end-users and their institutions, are already familiar with DVR and analog camera technology, and for They have invested large sums of money, and they are certainly happy to see the DVR become the dominant product in the market to consolidate its vested interests. Second, the inherent closedness of the traditional security industry, and the prevalence of proprietary technologies and single-brand solutions further permeate the “rumors†in the market that are not conducive to IP surveillance. In stark contrast to this, the IP surveillance solution integrates the best products and services from a variety of different suppliers. The result is the maximization of end-user benefits, and the result is in line with the current market environment. And market expectations are very different.
At this point, we have learned why there are many misunderstandings about IP monitoring in the market, and have initially discussed some of the facts about IP monitoring. Next, we will analyze the misconceptions that are widely circulated in some markets.
3. Top Ten Misconceptions 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 viewpoints and divided them into two major categories: Non-technical related Related to technology. We will first analyze those non-technical related misunderstandings and then further explore those technical related topics.
Misconception 1: DVR is the latest and most powerful CCTV security technology fact: Not only does some people think that Digital Video Recorder (DVR) is the latest and best technology, but there are also people who mistakenly believe that DVR is already a fully digital, networked technology -- and In fact, it is not.
Compared with traditional video cassette recorders (VCRs), DVRs do have many advantages, such as: no tape change, consistent image quality, and fast search capabilities. But you still can not get rid of those 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 DVRs, but also has more advantages that DVRs do not have, such as:
Scalability: In an IP surveillance system, there is no limitation similar to the DVR that must be expanded on a 16-way scale at a time. Users can expand the system from one camera to include the system by adding only one at a time. Thousands of cameras. At the same time, it also allows users to freely select any camera and its frame rate without any time or frame rate limitations.
More economical and efficient infrastructure: In many cases, most of the user's original equipment is already connected through an IP network, so no additional wiring is required to build an IP surveillance system (the wiring cost is usually one of the major construction costs of CCTV systems. ). In this case, the user's data, video, audio, and other information will all be transmitted and managed through the same network, making the overall system management more cost-effective.
Remote access: Users can securely access and control all video information in any corner of the world through a wired or wireless network, whether it is a real-time video stream or an already recorded video data.
Smart Camera: The network camera has built-in a series of intelligent functions, including motion detection, event processing, sensor input, relay output, time and date, etc. These functions enable the camera to intelligently make decisions based on the monitoring requirements and thus The correct time will send the correct alarm information to the correct recipient, and can send the video information to the specified user at the specified time and at the specified frame rate.
Lower system construction cost: The fact proves that IP surveillance system is a lower cost option for many video surveillance projects. IP monitoring solutions can use open, standardized networks, servers, and storage devices, which allows users to make more cost-effective choices from more vendors, while most DVR solutions restrict users to a single Or a few suppliers. In addition to the above-mentioned hardware selection factors, the IP surveillance system also has lower installation and maintenance costs and higher performance advantages. All this clearly shows that the IP surveillance system will save the user considerable construction expenses.
It can be seen 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 market evaluation, it is not difficult to find that the DVR actually represents an outdated, "black box" type of solution, and IP monitoring quickly proved to be a better and more advanced version of the DVR. technology. In fact, there are numerous differences between IP surveillance systems and DVRs, and the current market is just aware of this.
Misunderstanding 2: IP technology is an immature technology. If it is more advantageous, why did the security solution provider fail to achieve more relevant sales?
Practicality: The problem that this misunderstanding touches is, to a greater extent, related to the current security market structure and buying habits, and not to the performance and reliability of IP surveillance systems.
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 kind of new technology and new thinking, in order to replace the original thinking mode and behavior model, we must first build relevant information among integrators, industry consulting agencies, and other organizations that have influence on related industries. With knowledge and necessary infrastructure, these preparations will take some time to complete. I believe that few people will remember that in the age of typewriters, we used to think that such machines are completely enough for us to do word processing. We do not need any weird word processing software at all. Is it too long? Then think again about the old cassette tape recorders (VCRs). Have you been looking at them for a long time before replacing it with the now popular DVD player? Even you still use it? Obviously, the alternation of old and new technologies will take some time to complete.
The truth behind the misunderstanding is that the number of engineering projects using IP surveillance technology is growing at a rapid rate, and the number of system integrators and distributors involved in IP monitoring is also increasing. It will not be long before the security market will truly realize the superiority of IP surveillance technology. Since then, IP surveillance systems will be rapidly adopted and will be supported by more infrastructure.
If you think these facts are not convincing, let us look at the attitude of some giants in the industry to IP surveillance: IBM has entered the network security market, Cisco and Proxim are also committed to IP video Monitor the market for guidance and education. At this point, I believe we no longer need more arguments.
Misconception 3: IP surveillance solutions cannot meet the practical requirements of enterprise-level security applications.
Practical: The greater the scale of the system, the higher the required performance and the stronger the competitive advantage of the IP surveillance solution.
Among the advantages of IP surveillance systems summarized above, scalability is one of the most recognized advantages of all high-end users. Systems containing more than 200 to 300 cameras are very common projects for Axis. Some systems even contain thousands of network cameras. Some of these systems are used for applications where safety requirements are very high, such as international airports and prisons. Therefore, this misunderstanding can easily be clarified: The fact proves that the IP surveillance system is fully capable of enterprise-level security applications. In fact, we have already seen some large-scale government and airport video surveillance applications designating IP surveillance solutions as the preferred solution, and this phenomenon has never occurred one or two years ago.
Misconception 4: Networked video image quality does not have good analog image quality.
Practical fact: High-performance network cameras use the same quality image sensors (CCDs) and optical components as high-end analog cameras. In addition, by using a video server, professional analog cameras or installed analog cameras can be easily integrated into the IP surveillance system. When comparing IP cameras and analog cameras, it is important to note that the network cameras mentioned here refer to professional-grade products used for video surveillance, rather than low-end cameras for video chat, those cameras and fully-functional networks. Cameras cannot be compared.
In the near future, network cameras and IP surveillance technologies will generally support megapixel resolution, which can provide superior image quality. The analog camera is always subject to the NTSC/PAL standard, which limits its maximum resolution to about 400,000 pixels.
Misconception 5: Network cameras cost more than analog cameras, making the cost of IP surveillance systems very expensive.
Practical fact: The price of a network camera is indeed higher than that of a comparable analog camera. This is because it integrates more advanced features than analog cameras, such as information digitization, image compression, and other smart features. If you analyze the total hardware costs of the system (including cameras, cables, and video storage, etc.), you will find that the hardware cost of the IP monitoring system is usually the same as the hardware cost of the DVR-based monitoring system. Then, considering the system installation cost, then the IP The advantages of the monitoring system are obvious because the cost of building an IP-based infrastructure is much less than building a coax-based infrastructure. In addition, if PTZ control is needed, the analog system must also be set up for additional control lines, while the IP surveillance system does not have this additional expense. Power over Ethernet (PoE, Power over Ethernet) technology is another advantage of the IP surveillance system that can effectively save construction costs. This technology enables the network camera to receive working power and data at the same time through the same network cable, so that users can save specialization. The wiring cost required for powering the device and can be used in conjunction with an uninterruptible power supply (UPS) to further increase system reliability.
Misunderstanding 6: If you have installed a large number of analog cameras, users can no longer use IP monitoring technology, but only use DVR.
Reality: Perhaps the DVR supplier very much hopes that users will believe this, but video server technology (VideoServer) can be a strong counterattack on this misunderstanding. Leading IP surveillance providers can provide users with mature video server products, and their cost is within a reasonable range. The video server can convert the analog video signal into a digital video stream that can be transmitted over the network, thereby converting an analog camera into a network camera with basic functions. Most current IP surveillance systems incorporate analog cameras and network cameras that are networked through video servers. Existing analog systems and devices do not impede users from adopting advanced IP surveillance technologies.
At this point, we have clarified some of the most frequently misunderstood IP surveillance systems. They are all non-technical related topics. Next, let's do a thorough analysis of those technically related misunderstandings.
Misconception 7: The transmission of all these video data over the network will inevitably lead to overload of the network, so this technique is practically infeasible.
Practical fact: A single network camera usually occupies only 0.2 to 2 Mbps 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 fully meet the transmission requirements of video data. For systems that include more network cameras and video servers, we recommend that users develop dedicated networks for video data. Just like rail transport, once the existing railroads are congested, only a few new rails need to be built. For enterprise applications, the core network can usually reach a gigabit capacity. With the support of existing switches and routers, users can easily divide the network bandwidth resources to reserve dedicated bandwidth resources for video applications. . In addition, some special configurations can also be used to ensure that network cameras do not consume excessive bandwidth resources when they are integrated into the corporate network.
On the other hand, the webcam itself is intelligent. It can determine the frame rate and resolution used to send the video stream over the network based on different time, events or picture activities. Therefore, in most cases, the camera will only use 10% of the time to send video information that is worth recording and archiving, while the remaining 90% of the time, no data will be transmitted through the network.
Misconception 8: It is not safe to transmit important video information over an IP network.
Practical facts: Although the Internet is mainly used to deliver some public information, as long as it adopts proper network security measures (such as firewall, VPN, and password protection), it can also be used to perform sensitive services with high security requirements. As we all know, many banks and financial institutions often carry out various types of financial services throughout the world through the Internet. For video surveillance applications with relatively low security requirements, the Internet obviously can also become a reliable carrier medium. Correspondingly, the analog surveillance system cannot adopt any security encryption or authentication mechanism. Anybody may easily obtain the video information transmitted on the line through the connection method, and even send false video information forged to the monitoring center. On the monitor, which completely disables the video surveillance system (just like in many movies). This situation is unlikely to happen in IP surveillance systems that use effective security measures.
Misunderstanding 9: The reliability of IP surveillance technology is not as high as other technologies. For example, when the network fails, the system cannot continue to work.
Reality: As early as the 1960s and 1970s, when the IP network infrastructure was first developed, how to ensure network redundancy has become the primary factor that must be considered when building 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 spare resources. When the primary link or the master device fails, the backup links and devices can still be configured. Maintain the normal operation of the system. In an IP network-based system, storage devices can be deployed in remote and secure locations. Servers can use backup power supplies. The system can use hot-swappable RAID hard drives, self-healing storage, and dual network cards to ensure reliability. . Although all of the above security measures may not be adopted for small-scale network systems, solutions based on high-quality IT components are in any case 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 a faulty device for an IP surveillance system will be much lower than a closed DVR system.
Misconception 10: IP surveillance popularity will take at least five years.
Practical: This is undoubtedly the biggest misunderstanding! Since Axis introduced the world's first network camera in 1996, it has sold more than 500,000 such so-called "future" products worldwide. At the same time, the market's attention and demand for IP monitoring systems are also increasing. Whether it is measured from the overall cost of the system, overall performance, reliability, or other standards, the IP surveillance system has been proven to be a mature solution today. With the continuous improvement and popularization of IP monitoring technology, IP monitoring systems will also become the main force in the security market in the future.
4. Concluding remarks In this article, we have in-depth analysis of some of the long-standing misunderstandings surrounding IP surveillance technology and systems. In fact, IP surveillance is indeed a mature solution that can be highly scalable, can effectively use existing network resources, and can achieve superior system performance at a lower overall cost. Its outstanding flexibility, reliability and intelligence will certainly win the favor of the market.
1. What is IP-Surveillance?
IP is an abbreviation for Internet Protocol. It is the most commonly used protocol for communicating through a computer network and the Internet. IP video surveillance systems (also known as network video surveillance systems) can digitize video information and transmit it over wired or wireless IP networks. This allows real-time monitoring and recording capabilities to be extended to all locations with network connectivity, while also allowing such systems to be seamlessly integrated with other security systems such as access control systems.
According to well-known industry analyst JP Freeman and his company's analysis, there are more than 20 million analog cameras installed in the United States alone. Of the 20 million units, more than 15 million were sold in 2002. These figures are sufficient to illustrate the extent of analog cameras selling, but despite this, the network cameras stand out from the market and become the fastest growing category of video surveillance products. Network cameras can be directly connected to an IP network and integrated with other applications on the network, allowing users to install cameras at remote locations, view, store, and analyze real-time video at one or more locations via the internal network or the Internet. data. According to another well-known industry analyst company, Frost & Sullivan, the annual growth rate of sales of traditional CCTV products is only about 10% from 2005 to 2010, and the market capacity will reach saturation in 2008; while sales of network video products over the same period The annual growth rate will reach about 40%, even though there is still room for growth by 2010. It is not difficult to foresee that, as the concept of digitalization becomes more and more popular, it will certainly replace analog products in the near future.
The IP surveillance solution can be entirely composed of a network camera, an analog camera plus a video server, or a mixture of both. Regardless of the form used, IP monitoring has proven to be an attractive solution in a variety of industries. In countless industrial applications, this revolutionary technology is gradually replacing the traditional monitoring system to reduce costs and improve safety. At the same time, in other fields of application, it is also beginning to be used to initiate and stimulate the formation of new markets.
Powerful scalability is one of the major advantages of IP surveillance systems, which makes it recognized as an attractive technology that is not only suitable for improving and perfecting existing video surveillance and remote monitoring systems, but also very suitable for some New industry applications, including:
Education: Remote monitoring of the school's playground, corridors, halls and classrooms, as well as monitoring of some buildings;
Transportation: remote monitoring of the safety of railway stations, railway tracks, highways, and airports;
Banks: bank security monitoring on main streets, branch monitoring and monitoring of ATMs;
Government: Security and surveillance applications, usually integrated into existing systems;
Retail: Used for security and remote monitoring, effectively simplifying store management and improving work efficiency. Industrial: Used to monitor production processes, logistics systems, warehouses, and inventory management. 2. Why is there a misunderstanding of IP monitoring technology?
For any new technology, from its emergence to widespread application, it will inevitably undergo a market education stage. The more complex the new technologies are, the more entrenched the original technology and business models are, the longer the education period of this market will last. In this process, some knowledge gaps and misunderstandings are commonplace. It is in this environment that some misconceptions and confusion surrounding new technologies will continue to breed and spread.
In fact, IP monitoring technology is not a highly complex technology, but the part that belongs to the “IP†category has broken through the traditional security concept and entered a field that is unfamiliar to most traditional security practitioners. 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. When IP surveillance emerged, it formed a direct competition with DVR. This situation brought a series of disputes. One of them is that it poses a serious challenge to an industry-recognized viewpoint. This view points out that DVR technology combines analog cameras. It is the ultimate solution for video surveillance systems and is therefore the best video surveillance technology. Careful analysis, it is not difficult to tell what is wrong: First of all, the current security industry from the manufacturer to the project, system integrators, and then the end-users and their institutions, are already familiar with DVR and analog camera technology, and for They have invested large sums of money, and they are certainly happy to see the DVR become the dominant product in the market to consolidate its vested interests. Second, the inherent closedness of the traditional security industry, and the prevalence of proprietary technologies and single-brand solutions further permeate the “rumors†in the market that are not conducive to IP surveillance. In stark contrast to this, the IP surveillance solution integrates the best products and services from a variety of different suppliers. The result is the maximization of end-user benefits, and the result is in line with the current market environment. And market expectations are very different.
At this point, we have learned why there are many misunderstandings about IP monitoring in the market, and have initially discussed some of the facts about IP monitoring. Next, we will analyze the misconceptions that are widely circulated in some markets.
3. Top Ten Misconceptions 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 viewpoints and divided them into two major categories: Non-technical related Related to technology. We will first analyze those non-technical related misunderstandings and then further explore those technical related topics.
Misconception 1: DVR is the latest and most powerful CCTV security technology fact: Not only does some people think that Digital Video Recorder (DVR) is the latest and best technology, but there are also people who mistakenly believe that DVR is already a fully digital, networked technology -- and In fact, it is not.
Compared with traditional video cassette recorders (VCRs), DVRs do have many advantages, such as: no tape change, consistent image quality, and fast search capabilities. But you still can not get rid of those 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 DVRs, but also has more advantages that DVRs do not have, such as:
Scalability: In an IP surveillance system, there is no limitation similar to the DVR that must be expanded on a 16-way scale at a time. Users can expand the system from one camera to include the system by adding only one at a time. Thousands of cameras. At the same time, it also allows users to freely select any camera and its frame rate without any time or frame rate limitations.
More economical and efficient infrastructure: In many cases, most of the user's original equipment is already connected through an IP network, so no additional wiring is required to build an IP surveillance system (the wiring cost is usually one of the major construction costs of CCTV systems. ). In this case, the user's data, video, audio, and other information will all be transmitted and managed through the same network, making the overall system management more cost-effective.
Remote access: Users can securely access and control all video information in any corner of the world through a wired or wireless network, whether it is a real-time video stream or an already recorded video data.
Smart Camera: The network camera has built-in a series of intelligent functions, including motion detection, event processing, sensor input, relay output, time and date, etc. These functions enable the camera to intelligently make decisions based on the monitoring requirements and thus The correct time will send the correct alarm information to the correct recipient, and can send the video information to the specified user at the specified time and at the specified frame rate.
Lower system construction cost: The fact proves that IP surveillance system is a lower cost option for many video surveillance projects. IP monitoring solutions can use open, standardized networks, servers, and storage devices, which allows users to make more cost-effective choices from more vendors, while most DVR solutions restrict users to a single Or a few suppliers. In addition to the above-mentioned hardware selection factors, the IP surveillance system also has lower installation and maintenance costs and higher performance advantages. All this clearly shows that the IP surveillance system will save the user considerable construction expenses.
It can be seen 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 market evaluation, it is not difficult to find that the DVR actually represents an outdated, "black box" type of solution, and IP monitoring quickly proved to be a better and more advanced version of the DVR. technology. In fact, there are numerous differences between IP surveillance systems and DVRs, and the current market is just aware of this.
Misunderstanding 2: IP technology is an immature technology. If it is more advantageous, why did the security solution provider fail to achieve more relevant sales?
Practicality: The problem that this misunderstanding touches is, to a greater extent, related to the current security market structure and buying habits, and not to the performance and reliability of IP surveillance systems.
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 kind of new technology and new thinking, in order to replace the original thinking mode and behavior model, we must first build relevant information among integrators, industry consulting agencies, and other organizations that have influence on related industries. With knowledge and necessary infrastructure, these preparations will take some time to complete. I believe that few people will remember that in the age of typewriters, we used to think that such machines are completely enough for us to do word processing. We do not need any weird word processing software at all. Is it too long? Then think again about the old cassette tape recorders (VCRs). Have you been looking at them for a long time before replacing it with the now popular DVD player? Even you still use it? Obviously, the alternation of old and new technologies will take some time to complete.
The truth behind the misunderstanding is that the number of engineering projects using IP surveillance technology is growing at a rapid rate, and the number of system integrators and distributors involved in IP monitoring is also increasing. It will not be long before the security market will truly realize the superiority of IP surveillance technology. Since then, IP surveillance systems will be rapidly adopted and will be supported by more infrastructure.
If you think these facts are not convincing, let us look at the attitude of some giants in the industry to IP surveillance: IBM has entered the network security market, Cisco and Proxim are also committed to IP video Monitor the market for guidance and education. At this point, I believe we no longer need more arguments.
Misconception 3: IP surveillance solutions cannot meet the practical requirements of enterprise-level security applications.
Practical: The greater the scale of the system, the higher the required performance and the stronger the competitive advantage of the IP surveillance solution.
Among the advantages of IP surveillance systems summarized above, scalability is one of the most recognized advantages of all high-end users. Systems containing more than 200 to 300 cameras are very common projects for Axis. Some systems even contain thousands of network cameras. Some of these systems are used for applications where safety requirements are very high, such as international airports and prisons. Therefore, this misunderstanding can easily be clarified: The fact proves that the IP surveillance system is fully capable of enterprise-level security applications. In fact, we have already seen some large-scale government and airport video surveillance applications designating IP surveillance solutions as the preferred solution, and this phenomenon has never occurred one or two years ago.
Misconception 4: Networked video image quality does not have good analog image quality.
Practical fact: High-performance network cameras use the same quality image sensors (CCDs) and optical components as high-end analog cameras. In addition, by using a video server, professional analog cameras or installed analog cameras can be easily integrated into the IP surveillance system. When comparing IP cameras and analog cameras, it is important to note that the network cameras mentioned here refer to professional-grade products used for video surveillance, rather than low-end cameras for video chat, those cameras and fully-functional networks. Cameras cannot be compared.
In the near future, network cameras and IP surveillance technologies will generally support megapixel resolution, which can provide superior image quality. The analog camera is always subject to the NTSC/PAL standard, which limits its maximum resolution to about 400,000 pixels.
Misconception 5: Network cameras cost more than analog cameras, making the cost of IP surveillance systems very expensive.
Practical fact: The price of a network camera is indeed higher than that of a comparable analog camera. This is because it integrates more advanced features than analog cameras, such as information digitization, image compression, and other smart features. If you analyze the total hardware costs of the system (including cameras, cables, and video storage, etc.), you will find that the hardware cost of the IP monitoring system is usually the same as the hardware cost of the DVR-based monitoring system. Then, considering the system installation cost, then the IP The advantages of the monitoring system are obvious because the cost of building an IP-based infrastructure is much less than building a coax-based infrastructure. In addition, if PTZ control is needed, the analog system must also be set up for additional control lines, while the IP surveillance system does not have this additional expense. Power over Ethernet (PoE, Power over Ethernet) technology is another advantage of the IP surveillance system that can effectively save construction costs. This technology enables the network camera to receive working power and data at the same time through the same network cable, so that users can save specialization. The wiring cost required for powering the device and can be used in conjunction with an uninterruptible power supply (UPS) to further increase system reliability.
Misunderstanding 6: If you have installed a large number of analog cameras, users can no longer use IP monitoring technology, but only use DVR.
Reality: Perhaps the DVR supplier very much hopes that users will believe this, but video server technology (VideoServer) can be a strong counterattack on this misunderstanding. Leading IP surveillance providers can provide users with mature video server products, and their cost is within a reasonable range. The video server can convert the analog video signal into a digital video stream that can be transmitted over the network, thereby converting an analog camera into a network camera with basic functions. Most current IP surveillance systems incorporate analog cameras and network cameras that are networked through video servers. Existing analog systems and devices do not impede users from adopting advanced IP surveillance technologies.
At this point, we have clarified some of the most frequently misunderstood IP surveillance systems. They are all non-technical related topics. Next, let's do a thorough analysis of those technically related misunderstandings.
Misconception 7: The transmission of all these video data over the network will inevitably lead to overload of the network, so this technique is practically infeasible.
Practical fact: A single network camera usually occupies only 0.2 to 2 Mbps 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 fully meet the transmission requirements of video data. For systems that include more network cameras and video servers, we recommend that users develop dedicated networks for video data. Just like rail transport, once the existing railroads are congested, only a few new rails need to be built. For enterprise applications, the core network can usually reach a gigabit capacity. With the support of existing switches and routers, users can easily divide the network bandwidth resources to reserve dedicated bandwidth resources for video applications. . In addition, some special configurations can also be used to ensure that network cameras do not consume excessive bandwidth resources when they are integrated into the corporate network.
On the other hand, the webcam itself is intelligent. It can determine the frame rate and resolution used to send the video stream over the network based on different time, events or picture activities. Therefore, in most cases, the camera will only use 10% of the time to send video information that is worth recording and archiving, while the remaining 90% of the time, no data will be transmitted through the network.
Misconception 8: It is not safe to transmit important video information over an IP network.
Practical facts: Although the Internet is mainly used to deliver some public information, as long as it adopts proper network security measures (such as firewall, VPN, and password protection), it can also be used to perform sensitive services with high security requirements. As we all know, many banks and financial institutions often carry out various types of financial services throughout the world through the Internet. For video surveillance applications with relatively low security requirements, the Internet obviously can also become a reliable carrier medium. Correspondingly, the analog surveillance system cannot adopt any security encryption or authentication mechanism. Anybody may easily obtain the video information transmitted on the line through the connection method, and even send false video information forged to the monitoring center. On the monitor, which completely disables the video surveillance system (just like in many movies). This situation is unlikely to happen in IP surveillance systems that use effective security measures.
Misunderstanding 9: The reliability of IP surveillance technology is not as high as other technologies. For example, when the network fails, the system cannot continue to work.
Reality: As early as the 1960s and 1970s, when the IP network infrastructure was first developed, how to ensure network redundancy has become the primary factor that must be considered when building 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 spare resources. When the primary link or the master device fails, the backup links and devices can still be configured. Maintain the normal operation of the system. In an IP network-based system, storage devices can be deployed in remote and secure locations. Servers can use backup power supplies. The system can use hot-swappable RAID hard drives, self-healing storage, and dual network cards to ensure reliability. . Although all of the above security measures may not be adopted for small-scale network systems, solutions based on high-quality IT components are in any case 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 a faulty device for an IP surveillance system will be much lower than a closed DVR system.
Misconception 10: IP surveillance popularity will take at least five years.
Practical: This is undoubtedly the biggest misunderstanding! Since Axis introduced the world's first network camera in 1996, it has sold more than 500,000 such so-called "future" products worldwide. At the same time, the market's attention and demand for IP monitoring systems are also increasing. Whether it is measured from the overall cost of the system, overall performance, reliability, or other standards, the IP surveillance system has been proven to be a mature solution today. With the continuous improvement and popularization of IP monitoring technology, IP monitoring systems will also become the main force in the security market in the future.
4. Concluding remarks In this article, we have in-depth analysis of some of the long-standing misunderstandings surrounding IP surveillance technology and systems. In fact, IP surveillance is indeed a mature solution that can be highly scalable, can effectively use existing network resources, and can achieve superior system performance at a lower overall cost. Its outstanding flexibility, reliability and intelligence will certainly win the favor of the market.
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