HD Network Monitoring Cost Analysis

The main factors that have hindered the large-scale use of high-definition IP cameras and high-definition network surveillance have been: limited network transmission bandwidth, excessive storage capacity, and high price of HD cameras.

With the development of technology, these two factors are gradually being eliminated.

First, the development of communication technology and coding technology has made network transmission bandwidth constrained and storage cost too high and has gradually become history.

Calculated in megapixel HD 720p, mainstream manufacturers use H.264 encoding, the bandwidth required is about 2-4Mbps (1080P is 4-8Mbps).

1. For the end user, this occupied bandwidth is not a problem at all. Users of mobile terminals using China Unicom's HSDPA+ network currently have a maximum downlink speed of 21.6 Mbps and an average speed of approximately 4-5 Mbps. For an upcoming 4G LTE network, the maximum downlink speed can reach 100 Mpbs to 150 Mpbs, and the average speed is expected to be over 20 Mpbs. In terms of fixed network, with fiber-to-the-home implementation in large and medium-sized cities, bandwidth of 10-100 Mpbs can already be achieved.

2. For the transmission network of video surveillance, in the current safe city, financial network monitoring and other projects, has been widely used to build a fiber optic network to achieve 1000M bandwidth network, installed in the front-end 100 1080P full-real-time high-definition network camera, take up the total The bandwidth resources are less than 50%. If 720P transmission is used, the total bandwidth resources are less than 25%, which can effectively support the practical application of HD network cameras.

3. The storage cost of HD monitoring is not as high as it seems.

At present, most surveillance systems use a fixed bit rate strategy for the video bit rate. The required storage space for 2M video is about 1 Gigabit per hour. The required storage space for 4 M video is about 2 Gigabytes per hour. Compared with D1 video using MPEG-4, it will be lower than the space required by traditional SD;

High-definition surveillance has a higher video resolution and adopts a 16:9 aspect ratio, resulting in a broader view of HD surveillance. The number of HD network cameras required for deploying a high-definition surveillance system is significantly less than the deployment of a standard surveillance system. The number of cameras required, so the total storage space required by the user can also be further controlled.

The previous storage content was only used locally. The current storage content can be used on the Internet. In terms of utilization efficiency and user cost, it is far lower than the digital surveillance era.

4. Encoding compression technology continues to advance and the H.265 standard will drive higher compression ratios.

In August 2012, the draft H.265 video codec standard was formally approved by the ITU organization. The clarion call of the ultra high-definition era will lead to a higher compression ratio at a lower technical cost (compression rate is higher than that of H.264). 30~50%) and better image quality (up to 7680X4320 resolution images).

The domestic company, Huawei Technologies, as the main technical contributor to the H.265 coding standard, is actively promoting the adoption of this new coding technology in the security field. It has announced that it will soon adopt H.265 technology in the security field.

As the H.265 industry chain becomes more and more mature, it will further accelerate the large-scale arrival of China's security high-definition networking era.