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Главная > Отраслевая информация > Network Wireless Monitor Prevails High-Definition Video Surveillance Brings Problems
Отраслевая информация

Network Wireless Monitor Prevails High-Definition Video Surveillance Brings Problems

2019-03-20

WIFI network cameras have made a qualitative leap in image clarity, but they have also brought a series of real problems to high-definition surveillance systems. The three core issues to be solved by high-definition monitoring are: bandwidth issues, display problems, and storage problems.

Bandwidth Problems Due to the limited network bandwidth available at present, the high bit rate brought by high-definition video becomes the biggest promotion bottleneck. How to transmit as high quality video as possible with the lowest possible bit rate is the top issue that HD surveillance needs to solve. At the same time, due to the heterogeneity of the network, different networks have different channel characteristics. Different users enjoy different network bandwidths, and even the same user's bandwidth may change at any time. With the development of the monitoring field, various user terminals have the need to connect to monitoring video. For example, the network bandwidth of the local area network monitoring network is ideal, and users want to browse high-quality video. However, due to the limited bandwidth in the field of mobile phone monitoring, users value the low code. Rate video fluency. How to adapt to these different bandwidth environments is also a problem that HD surveillance equipment needs to solve.

Display problem Compared to standard definition video, the amount of information in high-definition video is abundant, and the corresponding performance requirements for decoding and display are also greatly improved. For example, the current mainstream PC can easily achieve 8-channel D1 standard definition video decoding display, but if the front end is 1080P High-definition video can only decode and display 1 way. For large-scale video surveillance platforms, if all use high-definition video, server decoding pressure will be great.

The increase in image resolution of storage problems will inevitably consume more storage space. Taking 1920×1080@30 frames of video as an example, using the H264 encoding algorithm, to ensure clarity, the code stream needs to be maintained at 6Mbps or more, which is about 4-8 times that of standard definition video. Under standard definition video conditions, a 16-channel DVR built-in 8 fast 2T hard disk can meet the long-term video storage requirements. In high-definition monitoring, this time will be greatly shortened, which will bring about increased storage costs.

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