WebRTC-based Design And Implementation Of Video Conferencing

Today, the world is more connected and globalization has become a hot topic. In thecomputer industry, we have a variety of software, providing people with the text calls, voicecalls and video calls. The most important is the development of video conferencing beingworld widely, no matter in management, education, or healthcare.By using WebRTC, which is maintained by Google, we just need simple APIs to addvideo call feature in Web page, software or terminal application development. In addition,WebRTC has a wide range of video quality improvement functions, like saving computerresources, and network resources. However, WebRTC does not have video conferencingcapability, because of the needs of multiplayer video conferencing is becoming popular, weneed to add video conferencing capability in WebRTC, for the developers who want to developthe video conference function.First, analyse the WebRTC structure and its internal functions implementation, to prepareto add video conference function; analyse YUV format, which is WebRTC default imageformat, to understand the structure of YUV format for the MCU (Multi Control Unit) serverdesign; analyse three connection methods for video conference.second, implement the video conference systems, including the realization of basicterminal, small range video conference and large range video conference. In the large rangevideo conference, we also need to design and code MCU server, and explain the importantfunctions in the server, such as image processing algorithm.Last, test the small, large range video conferencing systems; after successfuldemonstration, test both systems on CPU usage and network usage, and then makecomparisons with different number of video stream. And then summary the whole thesis.