Tag: H.264 SVC Cloud Computing Technology
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As we all know, networking, high-definition, and intelligentization are the three major trends in video surveillance development 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, and even civilian systems such as communities, buildings, etc., or technological developments, such as megapixels, HD- SDI, coding technology, video storage technology, intelligent analysis of video, VMS video management system, etc. are basically the main evolution direction.
However, with the rapid change of new technologies and the elimination of barriers between industries, especially the integration of security and IT technologies, communication 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 with natural advantages in IT technologies such as network and cloud computing, will be on the one hand in the development trend and application requirements of such new technologies. Promote the update of applications, technologies, products and solutions for video surveillance, and on the other hand, gain new opportunities in the new wave of video surveillance.
In fact, with the rapid application of IP technology and video management software platforms, the traditional video surveillance industry, especially with analog cameras plus DVR, or the traditional architecture of network cameras plus NVR, is undergoing tremendous changes. New technological changes have not only rapidly improved the quality of traditional video surveillance such as higher pixels, wider monitoring range, higher resolution, etc., but also created new applications and expanded the traditional security industry. The scope.
The IP wave has not been avoided, the software revolution has changed the world, and IP and software are rapidly changing the traditional security industry. This paper makes a brief analysis of the development trends and requirements of the development of video surveillance in the security industry in the face of new technology and application requirements.
Video surveillance needs more attention to image quality
The development trend of high-definition makes it necessary for the end customer, equipment manufacturer or engineering company to say "megapixel" and "10 million pixels". In the past few years, HD HD and megapixel cameras have been the darling of everyone's attention. Almost every manufacturer will add “HD†and “Megapixel†products to their product list, otherwise they will not keep up with the trend. . In fact, it is true. According to the new forecast statistics, by 2015, more than 70% of all network cameras will have a resolution of more than megapixels. In other words, the industry has also reached a basic common sense that only megapixels can solve the current needs of video surveillance.
Under such a trend, the equipment manufacturer sings, I am on the scene. Chip manufacturers such as Micron / Aptina, Sony / Sony, Ominivision, Panasonic and other CMOS / CCD photosensitive components manufacturers continue to introduce 1.3 million, 2 million, 3 million, 5 million, 8 million and 10 million CMOS products, domestic manufacturers also The same level of network camera products have been launched. In foreign countries, Arecont Vision launched a 20-megapixel camera, Dallmeier even launched a 2 million-pixel (2 million-megapixel) camera product, making security cameras enter the megapixels from the megapixel (MEGAPIXEL) era ( GIGAPIXEL) era.
Such a trend has led to a misdirection in the entire industry, that is, "higher pixels are better image quality" and one-sided pursuit of high pixels. What video surveillance needs to solve is to see and see clearly. On the one hand, it is said that there is a higher pixel to see the details, that is, a 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 pixel points, but also on image processing techniques (such as image correction, image processing, grayscale processing, gamma adjustment, 2A algorithm, etc.), as well as high-quality lenses.
Therefore, the realization of megapixel high-definition high-quality based on the existing megapixel mature products and technologies will be a new requirement for 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, more focus on improving image quality.
The application determines the trend. For most video surveillance applications, you don't have to have very high pixels, such as smart analysis, face recognition, or license plate recognition, as long as you have a higher recognition accuracy, not higher pixels will have Better results. So far, the demand for high-pixel cameras has not increased rapidly as the market has grown. So, to put it simply, a high-pixel camera is not a technical problem to some extent, but a market issue.
Based on this trend, equipment manufacturers are required to pay more attention to 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, the leading manufacturer of network cameras, is based on this. The network HD camera launched by Tongfang has also greatly improved compared with other traditional manufacturers, especially in terms of illumination compensation and real-time wide dynamics. Very detailed.
Short-term based on coaxial HD can not challenge IP HD
In the past two years, a new application technology has emerged in the high-definition field, based on high-definition (HD OverCoax), which is based on digital transmission technology in the field of high-definition digital broadcasting, and is based on the promotion of this technology in the field of video surveillance. The application's affiliate organization, such as HD-cctv, was established. In the two years of development, HD-cctv has not developed rapidly, not a technical problem, mainly because of the huge problems in application. HD-cctv products such as HD-cctv cameras and DVRs will not have a major impact on the overall security industry to network development, and will complement network video surveillance in local application scenarios.
In the past year, in addition to HD-CCTV products, new coaxial high-definition products such as HD-SDI and SLOC (Security Link over Coax) have gradually been introduced to the market. According to statistics, sales of coaxial high-definition products There is no greater growth. HD-CCTV products, HD-SDI products, and SLOC products are all expected to transmit high-definition digital signals on coaxial cables based on analog video surveillance. At present, the relatively mature camera solutions are also in mass production, and major manufacturers have introduced similar products and solutions.
In the long run, since the coaxial HD products adopt the same transmission medium and network architecture as the original analog monitor, the coaxial HD products, especially the HD-SDI series products include cameras, DVRs, codecs, management platforms, HD. -SDI optical transceivers, etc. may have greater opportunities and potential for traditional analog surveillance to HD development. But so far, due to storage, cost, transmission distance, system compatibility and many other factors, the rapid growth of high-definition products based on coaxial is greatly limited. In other words, in the short term, coaxial HD products will basically not have too much impact on network IP HD.
The further development of coaxial-based HD products must address the following three major issues:
First of all, the issue of standardization. With the improvement and maturity of ONVIF and PSIA standards, more and more manufacturers have joined these two organizations, basically solving the standard problem of network cameras. For the coaxial high-definition products whose target is to replace the original analog monitoring products, the compatibility between multiple manufacturers and multiple brands must be a problem that must be solved.
At present, apart from the HDcctv alliance organization, there is almost no complete standard organization to define HD-SDI product interfaces, technology development, compatibility issues, and so on.
Second, the problem of high storage costs. The advantage of HD-SDI is its uncompressed HD video, which also places higher demands on mass storage and storage costs. At present, it is basically based on hard disk storage, and the hard disk as the main storage medium is obviously unsatisfactory for 1080P or 720P uncompressed high-definition real-time video.
Finally, the question of market selection. At present, the overall industrial chain of network HD products is very mature. Whether it is the front-end products, storage devices, or the management equipment industry, the industry chain is relatively complete, and the cost of the overall solution has a huge advantage over coaxial high-definition. Recognition and cultivation 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 of future development
In recent years, the biggest technological revolution in the IT field, namely cloud computing technology. Based on the architecture and implementation of cloud computing technology, a new IT service, all IT infrastructure will be virtualized, providing only the software, data and storage services required by the Internet, based on the needs of users, in a cloud computing language. It 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, and the devices such as back-end storage will no longer be visible to users, thus avoiding the huge investment required for special equipment maintenance.
As we all know, real-time video is the main feature of video surveillance, and the cost of meeting this feature is the high demand for network bandwidth and storage. With the rapid deployment of network technologies such as EPON, GPON, FTTH, FTTB fiber-to-the-home networks, wireless broadband technologies such as 3G, 4G LTE, WIFI, and the optimization of coding compression technology, bandwidth issues will no longer be a major problem. 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 storage problems.
At present, the architecture, deployment, product, management, security, and operation of network video surveillance based on cloud computing technology have matured, especially in countries such as Europe and the United States, which are growing at a rate of 20-30% per year. Domestic manufacturers such as Tongfang Cloud Computing, Huawei, and ZTE have also begun to deploy 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 cloudâ€. 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 Gradually enter civil security, such as small and medium-sized enterprises, chain enterprises and individual users.
In addition, although intelligent is one of the trends of video surveillance, intelligent analysis has always been a hot spot for development, but it has never been implemented very well. The reason is the lack of good computing foundation, such as the network camera or NVR CPU technology capabilities. Cloud-based video analytics will provide the best platform and computing power for this.
Only through content analysis of video in the cloud, users can analyze massive amounts of information with huge virtual computing capabilities, such as intelligent functions such as face statistics, counting, and feature-based fast search. This kind of application is also called Architecture as a Service (IaaS), which is the main application of IaaS in the field of network video surveillance. On top of IaaS, network video surveillance based on cloud computing architecture can provide users with massive storage space and unlimited computing power.
The technical capabilities provided by cloud computing will enable the plug-and-play, on-demand configuration of the user terminal, ie the network camera, ie the VSaaS function. According to the user's own needs to configure storage space, video planning and mobile applications, real-time access to any place, anywhere, as needed.
Obviously, the convenience of the network will inevitably bring about the security of video data. The data security service (PaaS), the security functions on the cloud computing platform will be more perfect, especially to make up for the current network camera monitoring almost undefended loopholes. It can be securely encrypted by using IPSec at the network layer or TLS at the transport layer, and end-to-end encryption using the S/MIME mechanism at the application layer. RSA encrypts the conversation during transmission, and the transmitted content can be It is encrypted by algorithms such as DES, 3DES, and AES.
Data storage can be encrypted using algorithms such as 3DES, AES, or SM1. For example, the series of security encryption cameras launched by Tongfang is further developed. It supports 128-bit SM1, SM2, DES/3DES symmetric encryption algorithms. The transmission process uses a 1024-bit RSA algorithm to support 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 existing VMS manufacturers 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 are tailored to cover more users. This inevitably requires VMS to have good scalability, flexibility, and higher requirements for the technical capabilities of VMS manufacturers.
At present, the main development direction of VMS is "Openness", and the compatibility is very good. In addition, the future development of VMS needs to solve the following three major problems:
The first is a more user-friendly interface. More simple and convenient, beautiful user interface has become an important aspect of the growing concern of many manufacturers in the development of VMS. To make it easier for users to use, it is not easy to learn to get started.
Followed by mobile applications. For example, support for mobile terminal platforms IOS, Android, etc. Good support for mobile applications is a must for customers to meet their remote monitoring needs. But this is not the advantage of traditional security manufacturers. For newly-entered equipment manufacturers, especially IT manufacturers, and manufacturers with research and development capabilities for mobile platform development, it is worthy of an important development opportunity.
Finally, there is on-site integration. Good integration is not only reflected in an open interface, such as the perfect integration of the three security systems: anti-theft alarm system, access control system and video surveillance system, in addition to VMS must have better on-site integration capabilities.
The so-called field integration capability is the ability of VMS in the security field to have a good interface or access to other industry management platforms through a well-established SDK or through other standard interfaces. For example, integration with billing systems, user management systems, and application systems across industries.
Other technologies are also changing on demand, such as more efficient coding beyond H.264, which provides more efficient coding and compression, reducing storage space and bandwidth requirements. For example, the application of H.264 advanced mode, the beginning of H.264 SVC, new coding such as WebM, HEVC, and domestic AVS coding technologies will become the focus of attention.
The direction of digitalization and network development of security monitoring is becoming clearer and clearer. The direct impact of this change on users is to close the sense of distance between the user terminal and the monitoring front end. "Tongfang Yunan's overall products and solutions" combined with 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.
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