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  • The advantages and disadvantages of several surveillance video storage technology

        At first, analog surveillance camera connected to DVR directly stored , then network-based monitoring systems or stored in third-party servers , digital storage process so changing. These changes nothing more than digital surveillance era. PC-based NVR be monitored storage mode after the main , it changes the storage mode. Video image edge storage and cloud storage has become an important trend , according to IMS Research predicts 2013 will be video surveillance storage is more than 30% of network storage , with the advent of the fourth quarter , the security market will witness this miracle.
        Choose the best storage mode is important , according to the unique needs of exclusive styles designed to monitor storage mode . Designed for IP video system storage can provide a more robust , scalable , cost-effective solution. With IP camera advantages of real-time monitoring , the storage subsystem can help customers achieve higher resolution images . Current focus NVR storage , the advantages and disadvantages of several storage technologies for detailed review.
        NVR Benefits
        NVR can be based on PC architecture or embedded systems , depending on the architecture you can choose Windows or Linux storage technology. This allows the system integrator or end-user needs and budget according to choose the most suitable for their own storage systems. NVR has scalability , NVR storage also have such characteristics, the monitoring system can be tailored to the actual needs of a special part of your storage performance. Even the redundancy technology can also be a perfect interpretation , all records data will be lost .
        In many cases , real-time video will not be recorded . For example , surveillance camera does not support the capture of intelligent front-end , back-end need to transfer video to the device , which is most of the problems to be faced monitoring system . During transmission or because of system failures , network problems , and many other reasons . If you achieve a more optimal storage solution , which can effectively prevent this problem from occurring.
        Edge Storage Benefits
        Edge storage to record the edge of the Ethernet network , and not the entire network dataset after the image transfer to the marginalization process NVR . Essentially , the concept is distributed storage , data and device isolation. Its working principle is to store the recorded video information directly to the device , such as support for SD card storage of video surveillance camera, or built-in flash memory of the small hard drive. Advanced storage control framework brings another possibility of choice . By supporting low bandwidth monitoring and high-quality local video , users can optimize bandwidth limit and still get high quality video data for a detailed incident investigation .
        Edge stored three main benefits are: distributed storage , redundancy and low bandwidth . Scattered -site server stress storage solutions , NVR or PC video recording the cost . When security surveillance camera with the back-end server off the network , you can start the distributed storage , thus reducing the problems caused by a failure , the transfer of video storage path .
        Some people think that this storage method is not reliable . Because surveillance camera stolen may occur if all the recordings are stored in the front , which necessarily means that will lose all the important audio and video files. In addition , depending on the capacity of the SD card and record settings, video capture or video if only for seven days or less , which does not comply with the relevant provisions of the current monitoring and management . Up to 30 days of video data saved in this non-existent.
        In addition, the front-end storage is difficult to find an SD card reader progress and the state of equipment , end users do not know the life of the SD card , the video will be recorded and can not do real-time viewing. Unfortunately, failure is inevitable that some of these devices , " hindsight " means.
        Another disadvantage includes not able to view the video from the surveillance camera recording , if the network interrupts can not be a central server via a recording, control the video , and integration with third-party solutions facing conflict , so that some more harm than good . More importantly, if the surveillance camera multiplexer to call the same period of the video image , the retrieval process is more complex , the need to view each location point .
        Comparison of network monitoring front-end storage , let´s take a look at cloud storage and what advantages and disadvantages.
        Cloud Storage Advantages
        Cloud storage is usually in the form of monitoring services provided to users , this service allows the user to reduce the back-end hardware interrupt equipment investment , as these are recorded audio and video data that will be stored in the service provider . VSaaS is purchased based service , video service providers on a regular basis to pay . On the other hand , investment in IP surveillance camera user and network cost reduction , storage and maintenance of equipment provided by the outsourcing project .
        According to a new market research report , VSaaS market is expected to grow by 2016 to $ 160 million , growth of this market is driven video analysis software vendor results , including its account would increase VSaaS market value.
        However, there will be lots of cloud storage differences . Although the initial investment low , low maintenance cost is attracting many families and small-scale enterprise users , many of the security industry insiders believe that cloud storage is more suitable for smaller , non- high-security applications. In other words , cloud storage mode is not secure.
        VSaaS more popular with home security users and small business users, and because it provides a more flexible remote management. But its organizational structure security, data management and bandwidth challenges remain is not a small problem. In the dark image data storage management, the introduction of third-party cloud storage hazards remain.
        As mentioned above, the author , as a great challenge to network bandwidth . Especially when end-users need full HD real-time monitoring and recording, for such a request, each camera needs to transfer more than 20 Mbps of data , even if the network can support the transfer of image data to 1 Gbps , and can only maintain 600至700 Mbps of throughput Therefore, the potential end-users in the cloud is limited to a maximum of 35 sets of wireless surveillance camera, which also require special network case, the bandwidth without any lay down the ideal value.
        How to balance storage methods
        With current technology , the audio and video storage can be achieved in the following ways :
        * Use dedicated storage server implements several monitor storage , whether it is based on what kind of architecture NVR mode can be achieved.
        * surveillance camera front-end storage to achieve marginalized storage mode , combined with the back-end storage NVR .
        * Combination NVR and cloud storage , to different storage effect .
        Experienced system integrator can help users select the most suitable storage mode . Into the budget , storage characteristics, user requirements , scalability , and reliability are important considerations. These considerations will determine the final storage mode .

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