DVR technology development: intelligence is the mainstream

As the earliest ancestral technology in the field of video surveillance, CCTV and VCR have played a very important role in the field of surveillance and have made great contributions to security monitoring. However, due to the functional limitations of CCTV technology and the inconvenience in the use and maintenance of VCR technology. Make these two technologies gradually replaced by DVR technology. The application of technology is a topic that has been discussed in the development of the monitoring field. Then, what kind of security path will the DVR take in the future?

With the rise of third-generation network video surveillance, the concept of NVR (Network Video Recorder), which is called DVR replacement, is frequently mentioned. Whether it is the development of high-speed network transmission technologies or the increasing popularity of front-end network cameras, the market's demand for digital monitoring has let us see the direction of digital monitoring. NVRs are gradually replacing DVRs, but it does not mean that DVRs will be like video tape recorders. Like death. Because the DVR's cost advantage, ease of use, and long-term user base make the DVR will not disappear from the market for a long period of time, it will continue to occupy an important share in the market for a period of time. Below we analyze the development direction of DVR from the aspects of market and technology.

From a technical point of view, the DVR has been developed for a long time and has functions such as recording/recording, remote monitoring, and cloud mirror control of the image/voice, and functions such as screen division, alarm control linkage, and network transmission. At present, DVR technology has basically matured and its functions have been basically perfected. In the future, the development direction of DVR technology is believed to be fivefold:

1, the hardware can be summarized as faster processing, longer storage time. With the development of chip technology, higher-performance CPUs make DVRs faster and more powerful. From the early CIF DVR, to the current D1 DVR, 960H DVR, Hybrid DVR, HD-SDI DVR. In addition, with the trend of high-definition, the demand for storage is also increasing, and DVR hard disk management technology is also improving. Basically, the DVR may support more hard disk interfaces, support RAID technology, and support the compatibility of storage technologies such as DAS, SAN, and NAS.

2. The encoding method is more advanced. The compression technologies used in mainstream DVRs currently on the market include MPEG-4, H.264 and M-JPEG. MPEG-4 and H.264 are the most common compression methods in China, and H.264 has become the mainstream because it is more in line with the requirements of network transmission. In the future, in order to make embedded DVRs more widely applicable, the unification of various algorithms will be the trend of future development. However, such unification is not based on the standards of any domestic company, but requires a wide range of government functional departments and DVR industry chains. On the wide participation of various types of companies. For example, China has an AVS compression algorithm with independent intellectual property rights, and H. The 265 compression algorithm has revolutionized H.264 in many ways.

AVS (AudioVideocoding Standard, audio and video coding standard) is the abbreviation of the "Information Technology Advanced Audio and Video Coding Standard" series of standards, is China's second-generation source coding standard with independent intellectual property rights, and is a common basic standard for the digital audio and video industry. AVS solves the deadlock of patent licensing issues of AVC through a simple one-stop licensing policy. It is an open-ended national and international standard and easy to promote. In addition, AVC is only a video coding standard, and AVS is a complete standard system including system, video, audio, and media copyright management, providing a more comprehensive solution for the digital audio and video industry. With the support of national policies, it has the potential to become a unified standard in the video surveillance industry.

The H.265 standard is developed based on the H.264 standard. Combining the mainstream position of H.264 in the video application field can foresee the broad prospects for the development of the H.265 protocol in the future. Some mainstream TV organizations and media operators in the world have already chosen H.264 as the media format standard. Some major codec manufacturers have also actively participated in H. 265 standard research.

3. The interconnection and interworking function is more simple. Compared with the IPV's proposed ONVIF protocol, the DVR's software version upgrade is slow, and it appears to be insufficient for integration and unification. In terms of the interconnection between products, the openness between systems, each company does not have a unified standard for products. The access to the current system is mainly through the SDK. Each vendor is independent and can only solve the interconnection and interconnection at a certain level. It is a long-term process to truly realize interconnection and interconnection.

4, intelligent; From the technical point of view, intelligence is an important direction of development, only through the intelligent analysis of video information management can only get rid of people's work from the complicated affairs. In fact, the functions of real-time monitoring, early warning, information processing, retrieval, etc. all require smart technology applications. Although it is still difficult to completely realize the management of intelligent analysis technology in a short period of time, the current technology can already achieve semi-automatic monitoring intelligence to a certain degree. In most cases, intelligent analysis technology can be used to accomplish most of the work. Being able to concentrate on management and coordination processes is a better application at this stage.

As far as intelligence is concerned, the market demand is very strong. Many manufacturers now have DVRs with smart analysis technology. . At present, the best intelligent analysis technology does not have 100% accuracy, and the technology needs a lot of breakthroughs and improvements to meet the market's application.

5. The application of cloud computing is mainly embodied in cloud storage and cloud monitoring. For the security field, cloud storage is one of the main application directions in the field of cloud technology. Cloud storage refers to the integration of different types of storage devices in the network through application software through cluster applications, network technologies, or distributed file system functions to achieve a working system that provides storage and access to the outside world. DVR cloud storage technology will also be supported due to confidentiality security and remote monitoring requirements. Cloud monitoring, using cloud communication technology, the video stream is transmitted directly from the camera to the monitoring end, without server relay, the picture quality is clearer and smoother; the platform is more stable, more secure, 100% customs clearance rate, strong and stable communication, and the user Plug and play, no need for special person to install settings, no DDNS settings, no port conversion, real zero configuration, completely intelligent, adaptive to any complex network environment, automatic restoration of off-network power-off video; support for mobile phones, tablets, notebooks Computers, etc., Various terminals access control via browser or client mode.

Therefore, with the development of network technologies, identification technologies, microelectronics technologies, codec technologies, operating system technologies, etc., embedded DVRs will become smart, integrated, wireless, high-definition, personalized, and interactive. .

Today, with the increasing use of DVR technology. Digital monitoring systems have also been continuously improved in development. At present, the future DVR technology will move toward more compatible, multi-functional, and higher security factors. In order to achieve a more complete, convenient and reliable solution for users from the initial video recording to archiving to analysis. At that time, DVR technology will also lead the security monitoring technology to a new level.