Analysis of Video Surveillance Bandwidth in Chain Hotels

I. The current status of hotel chains monitoring the market The uniqueness of hotel chains has the status of cross-region, inter-city, inter-provincial, and even transnational. This has brought a heavy burden on the management of chain hotels, in order to achieve modern management. And development, quickly and easily grasp the real-time status of each network to ensure the security of each network, improve management quality and efficiency, a large number of hotel chains began to use remote video surveillance systems to achieve access to the hotel chain, charging conditions, equipment operation And the overall security work is monitored and recorded in real time.

Most of the hotel chain video surveillance system uses a "headquarters + branch" of the secondary system, to achieve the independent monitoring of stores and the headquarters of the purpose of remote supervision and management. In addition, according to the specific administrative requirements of each locality, the monitoring system of the stores will generally be required to be connected to the local application platform of public security agencies and the competent department for video surveillance.

Second, the bandwidth problem is a problem between the store and the headquarters of communication between a chain hotel chain stores and bandwidth are limited, usually can not and do not need to use 100M bandwidth optical fiber, and each store is basically based on ADSL broadband network, through Such a limited bandwidth network to meet the business needs of the hotel's own room business and its internal office functions.

In general, within the store's own LAN environment, there is no problem to implement a local video surveillance application. However, if there are more than 40 commercial hotels in a room, if the store has more than 20 monitoring sites installed locally, then How do the headquarters staff manage and monitor each store from a big screen or a PC computer?

Each time the store uploads an image? Upload 4 images each time? If it is an HD image, what should I do? ADSL uplink bandwidth can support so many? I believe this problem has troubled many people.

Third, the initial solution 1. method 1

Using composite video channels, such as DVR products from some domestic manufacturers, the last video channel can be a composite of the front channel and only occupy one stream. In this way, the head office can only use the software to retrieve only the images of the composite video channel. If you want to take a closer look at a video, you can use the screen coordinates to convert which video is specific and then read it.

The merit of this method is needless to say. The biggest problem is that some manufacturers' products do not support composite video streaming. Today, with the rise of HD, this solution does not have universal significance.

2. Method 2

Take the domain management plus streaming media server, supplemented by traffic control management functions. In order to reduce the bandwidth between the headquarters and the hotel chain, each domain hotel and hotel center deploys a domain forwarding server and configures the streaming media server. They will be automatically paired.

Domain forwarding servers are primarily responsible for forwarding video streams and control instructions. It does not access the device itself, but it is attached to the streaming media's access device capabilities.

At this time, the client at the hotel headquarters wants to retrieve the video of the hotel chain, and can send the retrieving instructions to the streaming media service 2, and finally obtain the video signal through the forwarding server, regardless of how many clients view the video at the same time. All occupy only one way of bandwidth, which greatly reduces the occupancy rate of bandwidth.

This approach, although it can achieve a bandwidth control of the store and hotel headquarters, heighten the efficiency of bandwidth use, but also applies to the products of various manufacturers, but in essence, the problems we mentioned before are not essentially solved.

Fourth, a better solution We believe that, in comparison, to solve these problems must be resolved from the software, especially on the basis of domain management, the use of transcoding technology and P2P technology.

In stores, whether it is NVR or streaming media server, through the start of transcoding services, through the software to obtain composite video streams, and then through the P2P technology to share with the management headquarters and third-party regulatory agencies. Domain management techniques are used to ensure bandwidth utilization efficiency.

This approach is a synthesis of all the previous methods and the technical requirements are very high. However, the obvious advantage is to meet the needs of multi-channel video access and management under very low bandwidth conditions on the basis of ensuring the normal business operations of the store.