Application of the access network system in video conferencing

At present, the access network system is still widely used. Many people may not understand the application of the access network system in video conferences. It does not matter. After reading this article, you will certainly have a lot of GAINS, I hope this article will teach you more things. In recent years, with the construction and transformation of large domestic and foreign network operators on the network environment, as well as the application and promotion of ISDN, DDN, VPN, ATM and other technologies, the use environment of the video conferencing access network system is also getting better and better. Therefore, both the communication industry and the IT industry have paid more attention to the video conferencing field. The technology of video and audio encoding and decoding tends to mature, and the price of video conferencing systems has been lowered, greatly improving the image transmission quality.

Problems in the software video conferencing Access Network System

Currently, the application of video conferencing systems is still far from widespread. What makes the Video Conferencing System mature in theoretical research and difficult in practical application. We will discuss the reasons for this problem from the following two aspects.

Understanding issues. Many people think that the video conferencing system only provides the meeting function. But in fact, the conferencing function is only a typical application of video conferencing systems. The basic function of the Video Conferencing System is to meet the needs of people to cross the spatial boundaries and conduct interviews in different regions. It not only supports remote teaching, remote medical care, Business Negotiation, remote joint office, remote interview, but also supports visual phone calls, Real Online consulting, student gatherings, video entertainment and chat, the specific application scenarios are numerous. The society's understanding of video conferencing systems is limited to the literal meaning. This misunderstanding directly affects the wide application of video conferencing systems.

The society still has a wrong understanding of the access network system, that is, the video conferencing system is very complex and must be equipped with dedicated hardware devices. In general environments, the video conferencing system cannot be implemented, that is, it cannot be used. This reflects that many people are only accustomed to the hardware implementation of video conferencing, while ignoring the software implementation method. This situation may have existed 10 years ago. However, with the rapid development of computer technology, network technology, and communication technology, the application environment of the access network system is changing with each passing day, and the basic conditions for Video Conferencing System Application have long been mature. The CPU computing speed of a PC has generally reached the GHz level, and is competent for processing voice and video signals. However, broadband network applications are becoming increasingly popular, and the price of a camera is tens of RMB, can meet the needs of general users. To achieve basic video conferencing, it is not necessary to configure dedicated hardware terminals, communication lines, cameras, and other devices. To use the existing processing environment, as long as appropriate software is configured, you can easily achieve visual and audio communication. Software implementation methods play an increasingly prominent role in video conferencing applications, and will gradually replace the dominant position of hardware implementation methods.

Broadband access problems

The bandwidth of the access network. Bandwidth Resources of the communication network required by the video conferencing system have bottlenecks in the access network. The bandwidth of the main transmission network is generally the order of Gb/s and Tb/s, which is quite rich, and the access network at the user terminal is relatively tight. Data usage is negligible. A single voice signal requires about 6 kb/s, while a single image signal usually requires 64 KB/s, the Video Conferencing System Terminal requires an upstream bandwidth of about 80 KB/s and a downstream bandwidth of N × 80 kb/s. N indicates the number of users participating in the communication. Therefore, although ADSL supports video conferencing systems, the number of interactive users is limited to a few. To make the video conferencing access network system a tool for people's daily work and life, there should be no such restriction. Therefore, optical fiber access is an inevitable development trend of access technology.

Although there are some technical bottlenecks that need to be broken through, the current network equipment and terminal equipment are fully capable of completing high-quality software video conferencing systems such as campus network, Enterprise Network and LAN. By studying related protocols and network communication knowledge, we designed and implemented the software video conferencing access network system, which completely achieved the expected results in the LAN and achieved four groups of meetings, each group of meetings has four meeting users online at the same time. With the continuous improvement of standard protocols, shortening of network communication latency, and increasing network bandwidth, the future of high-quality, multi-user software video conferencing systems on the Internet will not be far away.