High-definition monitoring and development will usher in the spring of high-definition storage

In today's rapid development of security HD surveillance, or for a long time in the future, which kind of storage technology and products will lead the coquettish, will become the mainstream security monitoring market, the mainstream technology and products?

High-definition video surveillance storage requirements First of all, compared to traditional analog security surveillance systems, HD video data storage capacity far exceeds the previous storage needs, you can use mass storage to describe, for example: 100 road security monitoring system, monitoring data Write according to 24 hours, the storage period is assumed to be 30 days. The traditional analog monitoring system calculates each D1 video image according to 2M code stream. The video data volume is approximately 62T, requiring 31 2T security monitoring hard disks; if the installation is 1080P High-definition digital video surveillance, each 1080P video image calculated by the average 6M stream, video data volume is about 186T, need 93 2T security monitoring hard drive, audio and video data storage capacity is 3 times the traditional analog monitoring system! As for the expansion to a safe city project, the total number of monitoring routes is usually several thousand to tens of thousands of roads, and tens of thousands of terabytes of projects are common, which is unimaginable for the traditional storage industry.

Second, performance requirements. Video surveillance is mainly the writing of video streams. The storage performance and technical specifications of the products are critical. Generally, it is measured by how many streams (2Mbps-10Mbps) can be stored simultaneously. In the case of multiple concurrent writes, the network bandwidth, data processing capacity, cache, etc. have a great impact on the storage pressure, this time storage requires a strong CPU network and storage processing capabilities, hard disk interface data Processing power, and optimized processing capabilities for video performance.

Third, stability requirements. Security monitoring and storage of video data as an important evidence for post-mortem verification often requires 7*24 hours of uninterrupted and error-free storage, which shows its importance, but it also differs from the storage stability requirements of traditional important data because the amount of video data is too large. The cost of backing up using traditional data backup technology will rise linearly and become very expensive, often exceeding the affordability of most construction units. Therefore, the stability of the single-storage product is required to ensure the stability of the entire system. At present, most storage applications are IP SANs, NAS, or storage servers. They all follow the traditional X86 computer model design. They are generally characterized by excessive power consumption, high temperature, no industry-specific design, hard disk damage, and poor stability. Disadvantages.

Finally, the convenience of user management. Massive data in the storage devices of security monitoring applications must be effectively managed, providing convenient, reliable, and transparent support for the use of end users.

Based on the analysis of the above application requirements, we can conclude that the development of storage technologies in the surveillance domain is to have multiple HD decoding display technologies, streaming media forwarding technologies, hard disk hibernation technologies, streaming media storage file system technologies, and embedded processing The direction of the device and embedded LINUX operating system technology, and the corresponding product is to the direction of the embedded network hard disk recorder (ENVR). In this direction, in the application of small and medium-sized monitoring systems, the corresponding storage products should be capable of supporting 4-16 channels of 720P or 1080P high-definition network video access, storage, forwarding and decoding, and support for small and medium-sized 2-8 disks. Decodeable display type embedded network hard disk recorder (ENVR); In large-scale monitoring system applications, the corresponding storage product should be able to support 16-64 channels of 720P or 1080P high-definition network video access, storage and forwarding, and support for 16-32 Large-scale centralized storage type embedded network hard disk video recorder (ENVR) in the tray.

HD video storage technology 1. Embedded processor and embedded LINUX operating system technology With the development of IC technology, embedded multi-core processor technology has also developed rapidly, especially in the industrial-level application of the dominant position is obvious to all.

Currently, industrial-grade embedded processors with multiple ARM processors and multiple codec DSP modules have been used on a large scale. Even if a single ARM processor has already reached the processing speed of 1.2GHz or more, combined with the improvement of Gigabit network processing capabilities, and the extremely low power consumption (only about 5W) and stability, directly leading to the traditional processor processing speed The advantages are gradually disappearing, and the disadvantages of traditional processors such as excessive power consumption, excessive temperature, complicated system board design, and high cost will cause customers to gradually give up.

The traditional WINDOWS and LINUX operating systems are too large. Although the interface is friendly, the system is inefficient in operation and consumes large resources. It does not support priority task scheduling, and cannot switch work tasks in time. It appears redundant and inefficient in monitoring the storage area. Seriously affect the stability and overall effectiveness of the system.

2. Streaming Media Storage File System Technology Most storage devices such as IP SANs, NAS, disk array servers, etc., all use FAT32 or NTFS file systems. Both of these file systems are general-purpose file systems, as opposed to specially designed video streaming media files. The system has the following defects and deficiencies: First, the design is complex, and the information volume of the file system itself occupies a lot of storage space, and it is often very easy to generate excessive disk fragmentation, which in turn leads to an increase in the probability of disk bad sectors and decreases the overall system. safety. The second is that it does not support the recording and retrieval of key information in video streaming media. Users can only use the conventional IO operation with low efficiency to search the video files concerned. This directly results in slow video search speeds and can not efficiently obtain effective video information. Problems such as poor support for video intelligence applications, especially on the basis of massive data, will be more prominent.

The video streaming media file system designed for video surveillance cancels a lot of redundant and meaningless file system information, uses more targeted and targeted audio and video critical information, intelligent indexing, and a series of streaming media efficient processing strategies to replace it. The pre-zoning storage strategy, with the absolute advantages of eliminating disk fragmentation, has the advantages of efficient and fast storage, fast video information retrieval, and high support for video intelligent applications.

3. Hard disk hibernation technology Hardware hibernation design can greatly extend the life of the hard disk, thereby reducing the hard disk damage rate. According to statistics from a bank, the damage rate of hard disks in industrial control DVR monitoring systems is kept at about 5%, while the hard disk damage rate of embedded DVR monitoring systems using hard disk hibernation mechanisms is kept within 1%.

The principle of hard disk hibernation technology is very simple. When the system is running, only the hard disk that is recording or playing back is working. The other hard disks are in the charged hibernation state. The motor does not run and no power is consumed. Once it is triggered, it can immediately run into working status. .

4. Streaming media forwarding technology In the all-digital high-definition surveillance era, compared to traditional storage devices, storage devices in video surveillance systems not only store data, but also must have streaming media forwarding functions, especially for large-scale cloud storage systems. in.

Streaming media forwarding technology is a comprehensive application of multi-streaming and decimation, and supports the IPC primary stream or sub-code while storing the primary stream of an access network camera (IPC). The stream is forwarded to other devices or audio and video processing systems.

5. Multi-channel high-definition decoding display technology Compared to analog storage devices, digital video recorders (DVRs), decoding of high-definition video images is more complex and requires more decoding capabilities. At present, the application of multi-channel high-definition decoding display technology has been reflected in the need to support simultaneous decoding of four 1080P high-definition video, and output to the same screen, therefore not only requires the device to have a stronger decoding capability, but also requires the output video clarity , color, saturation, etc. have higher quality.

There are many technical difficulties in multi-channel high-definition decoding display, highlighting such technical indicators as decoding capability, multi-screen switching, and image delay.

ENVR powers high-definition video surveillance and storage in high-definition video surveillance systems. ENVR is an ideal upgrade product for digital hard disk recorders. Because ENVR adopts highly integrated chip technology, it has advanced digital video recording, storage and playback functions, and does not require computer cooperation and Routine maintenance can achieve high resolution (up to 1080P resolution), high-quality real-time monitoring, and easy to use.

ENVR products have the advantages of low power consumption, high stability, strong decoding capability, rapid processing, easy query recording, clear video images, and multiple images displayed on a single machine. It also has the ability to protect hard disks, reduce the damage rate of hard disks, and prolong the service life of hard disks. And other outstanding advantages. More importantly, ENVR has a very high price/performance ratio, which greatly reduces the cost of video storage.

The development of ENVR products has also gone through a long period of time. After gradually solving the problems of weak processor capacity, poor network processing capability, prolonged images, and weak decoding capability, ENVR products that support 1-32-disk drives have been introduced one after another. , including support for hot-swappable hard drives and other functions, the formation of a series of products, especially the introduction of large-scale ENVR products 16-32 drive hard disk, make up for large-scale video surveillance systems can only use IPSAN, NAS, disk arrays and other X86 architecture storage The lack of server.

With the popularity of high-definition surveillance applications, ENVR is about to usher in a era of large-scale application. Whether it is in the application of small and medium-sized systems, large-scale system applications, or even cloud data storage system applications, use ENVR products instead of the current storage server. Other X86 architecture storage products are already a trend.