Efficient and real-time network conference data transmission library-UDT

In the development of video conferencing systems, we must ensure the reliability of audio and video data, because the video conferencing system is a very real-time system, if the network is not good, packet loss, data delay, and data congestion may occur, which may affect data reliability, this results in a reduction in the sound and video quality of the video conferencing system. So how can we implement real-time data, but ensure data reliability? In the previous article "video conferencing transmission module development and selection", we mentioned that if you select the video conferencing transmission library, here we will detail the UDT Library (UDP-based data transfer libraryudt high-performance data transmission protocol ).

The UDT database is an open-source data transmission database written by a doctor in the United States during the school period. Its Protocol is based on the UDP protocol, through data re-transmission, data verification, data restoration, and other technologies, efficient data transmission and reliable data transmission. Like other reliable transmission libraries, the UDT database encapsulates data on the UDP protocol for reliable transmission, why do we recommend using UDT as the data transmission library developed by video conferencing?

1. cross-platform

The development of UDT is based on the C language, and its cross-platform performance is good. In addition to Windows systems, UDT also supports mobile terminal operating systems, such as Android and IOS, therefore, if our video conferencing system is to run on mainstream mobile terminals, we can select the UDT library for data transmission. It is also very easy to use the UDT library on the mobile terminal platform. We can add the UDT library to our code or compile the UDT library into a dynamic link library, then, call the corresponding UDT function through the interface.

2. Reliability

The reliability of UDT is not like TCP's three-way handshake and re-sending implementation. If the network is blocked seriously, TCP will continue to resend data, which will cause more network congestion, in addition to unreliable UDP data transmission, UDT also uses control channels for data monitoring. If the network conditions are good, UDT Data will be re-transmitted to ensure data reliability. When the network conditions are poor, UDT will reduce the amount of data sent to achieve data transmission stability, this ensures reliable and real-time data.

3. Support for real-time transmission of massive data

UDT not only supports reliable data transmission, but also real-time transmission of massive data. Generally, the TCP or UDP Protocol makes it difficult to transmit big data over the network, during the transmission process, UDT establishes a buffer zone and a unique sliding window protocol for real-time data transmission. Therefore, UDT can transmit massive real-time data over the network.

4. Support Point-to-point connections

The so-called point-to-point transmission means that data is directly sent to the receiver by the sender without being forwarded by the server. This solution solves the problem of Intranet transmission. For example, in different intranets, if data needs to be transmitted to each other, data transmission between different intranets must be realized through server transit or NAT translation, UDT can be used to connect and transmit data from different intranets. Therefore, the UDT transmission database can be used to achieve point-to-point data connection and transmission over the Intranet at a very low cost. Therefore, the point-to-point mode of UDT is also very suitable for Video Conferencing Systems.

It can be seen that the UDT library can provide cross-platform, real-time data, massive data transmission, and point-to-point Transmission Support for video conferencing systems. It is an efficient real-time transmission library worthy of our attention and use.

Efficient and real-time network conference data transmission library-UDT