As we all know, networked, high-definition, and intelligent are the three major trends in the development of video surveillance in recent years. The development of the overall security industry, whether in applications such as intelligent transportation, safe city, banking system, public security system, other professional industry systems, or even civil systems such as communities, buildings, etc., is still in technological development, such as megapixel, HD- SDI, encoding technology, video storage technology, video intelligent analysis, VMS video management system, etc. basically take this trend as the main evolution direction.

However, with the rapid development of new technologies and the elimination of barriers between industries, especially the integration of security and IT technologies, communications technologies, and network technologies, the overall security video surveillance has undergone tremendous changes. Manufacturers in the security industry have put forward higher requirements. New manufacturers, especially those who have natural advantages in IT technologies such as networking and cloud computing, will be able to adapt to this new technology trend and application requirements. Promote video surveillance in the application, technology, products and solutions to replace the other hand, on the other hand in the wave of new developments in video surveillance won new development opportunities.

In fact, with the rapid application of IP technology and video management software platforms, the traditional video surveillance industry is undergoing tremendous changes in products and solutions under the traditional architecture of analog cameras and DVRs, or network cameras and NVRs. The new technological changes not only quickly improved the quality of traditional video surveillance such as higher pixel, wider monitoring range, higher resolution, etc., but also created new applications and expanded the traditional security industry. The range.

The IP wave has not been avoided. The software revolution has changed the world. IP and software are also rapidly changing the traditional security industry. This paper presents a brief analysis of the development trends and requirements for self-development of the video surveillance in the security industry in the face of new technology and application requirements.

Video surveillance needs to pay attention to the development trend of high-definition image quality so that no matter the end customer, equipment manufacturer or engineering company, they must say "megapixel" and "10 million pixels". In the past few years, HD HD and megapixel cameras are the darlings of all people. Almost every manufacturer will add “HD” and “megapixel” products to their product list, otherwise it will not keep up with the trend. . In fact, it is true that according to the new forecast statistics, by 2015, there will be more than 70% of all IP cameras with resolutions of more than megapixels. In other words, the industry has also reached a common understanding that only reaching megapixels can solve the current needs of video surveillance.

In this trend, equipment manufacturers sing you, I debut. Chip manufacturers such as Micron/Aptina, Sony/Sony, Ominivision, Panasonic and other CMOS/CCD photosensitive component manufacturers continue to launch 1.3 million, 2 million, 3 million, 5 million, 8 million and 10 million or more CMOS products, domestic manufacturers also One after another has launched a similar level of network camera products. In foreign countries, Arecont Vision introduced a 20-million-pixel camera, and Dallmeier even launched a 20-megapixel (two-million-megapixel) camera product, which enabled the security camera to enter one million pixels from the megapixel era (MEGAPIXEL). GIGAPIXEL) era.

Such a trend has led to a misguided orientation of the entire industry, that is, "higher pixels are better image quality" and one-sided pursuit of high pixels. Video surveillance to solve is to see, see clearly. The clear word on the one hand means that there are higher pixels to see the details, that is, higher resolution, and on the other hand, it is concerned with the quality of the image such as color, illumination, and wide dynamics. Therefore, image quality depends not only on pixels, but also on image processing techniques (such as image correction, image processing, grayscale processing, gamma adjustment, 2A algorithm, etc.), and high-quality lenses.

Therefore, achieving high-definition megapixel quality on the basis of existing megapixel mature products and technologies will be a new requirement under the development of high-definition. Some manufacturers have begun to pay attention to this trend, in addition to the introduction of higher-pixel camera products, will focus more on improving image quality.

The application determines the trend. For most cases of video surveillance applications, it is not necessary to have very high pixels, such as smart analysis, face recognition, or license plate recognition, as long as they can have higher recognition accuracy, and not higher pixels will have Better results. So far, the demand for high-pixel cameras has not grown rapidly with the growth of the market. So, to put it simply, a high-pixel camera is not a technical problem in a certain degree, but a market issue.

Based on this trend, equipment manufacturers need to invest more in image quality and improve product differentiation and performance under the same pixel conditions, such as low illumination, 3D noise reduction processing, and wide dynamics. For example, the P-Iris lens technology introduced by AXIS, a leading manufacturer of network cameras, is based on this. The network high-definition cameras launched by Tongfang have also greatly improved in this respect compared to other traditional manufacturers, especially in terms of illumination compensation, real-time wide dynamics, etc. Very detailed.

Coaxial high-definition cannot challenge IP in the short term. In the past two years, a new application technology has emerged in the high-definition field, based on coaxial high definition (HD OverCoax), which draws on digital transmission technology in the field of high-definition digital broadcasting. , And based on the promotion of this technology in the field of video surveillance, the use of alliance organizations such as HD-cctv was established. In the two years of development, HD-cctv has not developed rapidly. It is not a technical issue. It is mainly a huge problem in its application. HD-cctv products such as HD-cctv cameras, DVRs, etc. will not have a significant impact on the overall security industry's development toward networking, and will complement network video surveillance in local application scenarios.

In the past year and more, in addition to HD-CCTV products, new coaxial high-definition products such as HD-SDI and SLOC (Security Link over Coax) have also been introduced to the market. According to statistics, sales of coaxial HD products There is no greater growth. HD-CCTV products, HD-SDI products, and SLOC products are all expected to transmit high-definition digital signals over coaxial cables based on analog video surveillance. At present, relatively mature camera solutions have also been mass-produced, and major manufacturers have also introduced similar products and solutions.

In the long term, coaxial high-definition products adopt the same transmission media and network architecture as the original analog surveillance. Therefore, coaxial HD products, especially the HD-SDI series, include cameras, DVRs, codecs, management platforms, and HD. - SDI optical transceivers, etc. may have greater opportunities and potential in the development of traditional analog surveillance to HD. But so far, due to many factors such as storage, cost, transmission distance, and system compatibility, the rapid growth of high-definition products based on coaxial has been greatly limited. In other words, in the short term, coaxial high-definition products will basically not have much impact on the network IP HD.

The further development of coaxial HD-based products must address the following three major issues:

First of all, the problem of standardization. With the increasingly perfect and mature standards of ONVIF and PSIA, more and more manufacturers have joined the two organizations, basically solving the standard problem of network cameras. For the coaxial high-definition product whose target is to replace the original analog surveillance product, the compatibility between multiple manufacturers and multiple brands must be a problem that must be solved.

Currently, there is almost no complete standard organization other than the HDcctv alliance to define the HD-SDI product interface, technology development, and compatibility issues.

Second, the problem of high storage costs. The advantage of HD-SDI is its uncompressed high-definition video, which also imposes higher requirements on mass storage and storage costs. Basically, hard disk storage is still the main method, and hard disks are only used as the main storage medium for uncompressed high-definition real-time video of 1080P or 720P.

The last is the choice of the market. At present, the entire industry chain of network HD products is already very mature. Whether it is the front-end product, storage device, or management equipment industry, the industrial chain is relatively complete. The cost of the overall solution has a huge advantage over coaxial HD. Recognition and fostering in the market will be another major problem that coaxial HD products need to solve.

Network video surveillance based on cloud computing technology architecture has become the main trend in the future. In recent years, the biggest technological revolution has taken place in the IT field, namely cloud computing technology. Based on the new IT service architecture and implementation of cloud computing technology, all IT infrastructures will be virtualized, providing the required software, data, storage and other services through the Internet based on the needs of users, using the language of cloud computing. Is: SaaS, software as a service, PaaS, platform as a service, IaaS, architecture as a service.

Cloud computing technology will revolutionize network video surveillance applications, namely Video as a Service, VSaaS. This will greatly reduce the pressure on users to learn IT technology. In addition, devices such as back-end storage will no longer be visible to users, thus avoiding the need for dedicated personnel to invest in equipment maintenance.

As we all know, real-time video is the main feature of video surveillance, and the price to meet this feature is the high demand for network bandwidth and storage. With the rapid deployment of network technologies such as FTTH and FTTB fiber-to-the-home networks such as EPON and GPON, and the application of wireless broadband technologies such as 3G, 4G LTE and WIFI, as well as the optimization of coding and compression technologies, the bandwidth issue will no longer be a major issue. Cloud-based storage solutions will provide users with massive storage services. Technologies such as virtualization, load balancing, and grid computing are deployed on the back end, which will greatly solve the storage problem.

Currently, the architecture, deployment, product, management, security assurance, and operation of network video surveillance based on cloud computing technology have matured, especially in Europe and the United States and other countries are growing at a rate of 20-30% per year. In China, companies such as Tongfang Cloud Computing, Huawei, and ZTE also began deploying network video surveillance products based on cloud computing architecture in some regions. The current cloud computing architecture for network video surveillance is mainly carried out in the form of “private cloud”. With the investment of China Telecom, China Mobile and China Unicom in safe cities, digital cities and smart cities, the “public cloud” of video surveillance will also be implemented. Gradually stepped into civilian security, such as small and medium-sized enterprises, chain companies and individual users.

In addition, although intelligence is one of the trends in video surveillance, smart analysis has always been a hot spot, but it has never been implemented well. The reason is the lack of a good computing foundation, such as the network camera or NVR's CPU technology capabilities. Cloud-based video analytics will provide the best platform and computing power for this purpose.

Only through the content analysis of the video in the cloud, users can use huge virtual computing capabilities to analyze mass information, such as face statistics, counting, and feature-based fast search and other intelligent functions. This application is also referred to as infrastructure as a service (IaaS), which is also the main application of IaaS in the field of network video surveillance. Above IaaS, network video surveillance based on cloud computing architecture can provide users with easily scalable mass storage space and unlimited computing power.

The technical capabilities provided by cloud computing will enable the plug-and-play of user terminals, ie, network cameras, and the need for configuration on demand, namely VSAaS functionality. According to the user's own needs to configure the storage space, video planning and mobile applications, to achieve real-time random access at any time, anywhere.

Obviously, the convenience of the network will inevitably bring about the security of video data. By implementing data security services (PaaS), the security features on the cloud computing platform will be more complete, and in particular, it will make up for the almost unguarded vulnerability of current network camera monitoring. Secure encryption can be achieved by using IPSec at the network layer or by using TLS at the transport layer, end-to-end encryption by the S/MIME mechanism at the application layer, and RSA is used to encrypt conversations during transmission, and the transmitted content can be Using DES, 3DES, AES algorithm encryption.

Data storage can be encrypted using algorithms such as 3DES, AES, or SM1. For example, the series of security encryption cameras launched by Tongfang goes even further. It supports 128-bit SM1, SM2, and DES/3DES symmetric encryption algorithms. The transmission process uses a 1024-bit RSA algorithm and supports PKCSII-compliant PADDING. The signature algorithm supports 1024-bit RSA algorithm, and the hash algorithm supports HASH including SHA-1, MD5, SCH, etc. to ensure data security.

User interfaces that focus on User Interfaces and Field Integration video management software or platform (VMS) will be more user-friendly and convenient, and industry applications will be more focused.

For the existing VMS vendors already deployed, they will face two major problems. First, they will face new application requirements, such as the support of the latest national standard SIP, open interfaces, etc.; secondly, it will gradually reduce the difficulty of deployment and gradually Ordinary users cut out to cover more users. This necessarily requires VMS must have good scalability, flexibility, and also puts higher requirements on the technical capabilities of VMS manufacturers.

The current development direction of VMS is "Openness" and the compatibility is very good. In addition, the future development of VMS needs to address the following three major issues:

The first is a more user-friendly user interface. A more concise and convenient and beautiful user interface has actually become an important aspect that many manufacturers are paying more and more attention to in the development process of VMS. To make it easy for users to use, it is not a breeze to learn more easily.

Followed by mobile applications. For example, support for mobile terminal platforms IOS, Android, etc. The good support of mobile applications is the necessary way to satisfy customers' needs for remote monitoring. But this is not the advantage of traditional security manufacturers. For newly-entry equipment manufacturers, especially IT manufacturers, and manufacturers with R&D capabilities for mobile platforms, it is worth noting an important development opportunity.

The last is site integration. Good integration is not only reflected in an open interface, such as perfect integration of three major security systems: anti-theft alarm systems, access control systems, and video surveillance systems. In addition, VMS must have good on-site integration capabilities.

The so-called on-site integration capability is the ability of the VMS used in the security field to have a good interface or access to other industry management platforms through a complete SDK or through other standard interfaces. For example, integration capabilities with billing systems, user management systems, and application systems in various industries.

Other technologies are also changing on demand, such as overtaking H. 264's more efficient encoding provides more efficient encoding and compression, reducing storage space and bandwidth requirements. For example, apply H. 264 Advanced Mode, H. With the introduction of 264 SVC, new coding technologies such as WebM, HEVC, and domestic AVS will become the focus of attention.

The direction of digitization and network development of security monitoring has become clearer and clearer. The direct impact of this change on users has brought a sense of distance between the user end and the surveillance front end. The “Tongfang Security Overall Product and Solution” that combines security technology, Internet of Things technology and cloud computing technology will produce more innovative security products and applications, and will lead the development of the entire security industry.