Next-generation video surveillance system storage solutions (1)

Video surveillance in China

Monitoring technology from the 1980s into the country, along with the security requirements of a sharp increase has been developing rapidly, from a technical point of view, has undergone a number of different stages of development.

As computer technology development and popularization of the Internet, at present, the video surveillance has been developed to monitor the network multimedia system.

Next-generation video surveillance management system and the previous generation of video surveillance system is the fundamental difference is that it is no longer limited to simply complete on video signal processing, transmission and control, its core is based on the IP network of multimedia information (video/audio/data) provides an integrated, comprehensive management control platform.

Network multimedia monitoring system Web-based to digital video compression, transmission, storage and play as the core, smart and practical features of image analysis and alarm systems, access control system into a platform on the video surveillance industry of a technical revolution, swift has been the security industry and user attention. Network monitoring and management systems, multimedia can be widely used multimedia video dispatching, network video monitoring and meeting, multi-media webcast, online teaching, and telemedicine.

Network multimedia monitoring system monitoring and management by a network of multimedia platforms and front-end information acquisition devices, whose core is the network monitoring and management of multimedia platforms.

Network monitoring and management of multimedia platforms set computer network, telecommunications, video, streaming media, and automation technology, is video, audio, data and graphic integration solutions, and network video surveillance, video conferencing, video, broadcast, and other functions that have the super large-scale networking capability is built on top of LAN/Internet networks, support for multiple transports of integrated multimedia business management platform, its application is far beyond the control of the content covered by itself.

Network multimedia video server (NetworkMediaVideoSever, NMVS) is responsible for the front end of the video processing part, it also has a network video server network transport functions and DVR storage capabilities (VideoSever + DVR), NMVS is a video, audio, data compression, storage and processing of special computer equipment, video surveillance, Internet, IP video conferencing, video live broadcasting and VOD, and so has a wide range of applications.

NMVS uses the most advanced MPEG-4 or H.264 compression format such as, in line with specifications for video data compression, in order to meet the requirements of the storage and transport.

Video system characteristics of storage requirements

Video surveillance on the storage requirements are the following characteristics:

1. storage capacity demand elasticity is relatively large, storing more with the picture quality, screen sizes increase, the increase of video line will be multiplied by the increase in capacity requirements.

2. performance requirements for storage is not high, but need to be able to meet the long continuous data read/write, data flow is large but the number of access requests.

3. the data is saved and the cycle time is short, the General monitoring site data saved some time (e.g. 1-month) can be deleted later.

For video surveillance programmes choose suitable storage device, first to estimate storage requirements.

So now the mainstream of the compression method to calculate as follows:

MPEG4 compression method: 200MB/hour/road;

H.264 compression method: 150MB/hour/road

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