On the afternoon of September 20th, in the special session of qiniuyun sub-forum held by Cloud Computing University, Xu Jing, director of Qiniuyun education industry, shared the content entitled “Live Streaming 3.0 Era, fission and Reconstruction of online education Industry”. The following is a transcript of the speech.

Hello, everyone. My name is Xu Jing. As one of the earliest technical personnel in the live broadcasting industry, I have experienced various eras of live broadcasting.

Evolution of live video

Live video has gone through three eras. The earliest live broadcasts were actually television sets, broadcasting a standard definition signal, collectively known as live broadcasts. Many traditional media, such as BTV and CCTV before it, are the products of live broadcast 1.0 era. With the development of the Internet, live streaming entered the 2.0 era five or six years ago, which was marked by viewing and high-definition. At that time, many Internet startups emerged, such as Tencent Video, Youku, Tudou and IQiyi. They focused on hd and viewability of picture quality, but none of them had any interaction. In the late stage of 2.0, simple interaction gradually entered this market, such as rewards, likes and bullets in the process of live broadcast, which met the simple interaction needs of the post-90s. Over time, we found that all live streams were valuable when connected with interaction and communication. It is about social interaction and communication between people, so video gradually becomes a channel for sharing and expression.

At the same time, strong interaction means higher requirements for technology and lower latency.



The chart above is an analysis of data by the ITU-T International Union. The horizontal axis is time, in milliseconds, and the vertical axis is user experience. It is obvious that real-time communication cannot be completed if the delay exceeds 400ms, and user experience is affected if the delay exceeds 150ms.

What are the key technologies used to achieve latency below 150ms? Why wasn’t there such a low latency before 3.0? In the 1.0 and 2.0 era, RTMP was widely used in pursuit of high definition and accuracy, but TCP was ignored as a security protocol. The three-way handshake and retransmission policy ensured the quality while reducing the video transmission rate and increasing the delay. UDP reduces the delay, but does not have a retransmission policy and relies heavily on the network. As shown in the triangle below, TCP and UDP have their pros and cons. How can Reliable UDP be used to ensure data security while also taking advantage of ultra-low latency?





Trends in online education

The other thing that’s really important in the educational scene is the whiteboard. A teacher of traditional education once lamented that many things in the traditional classroom changed iteratively, but only one thing remained until now, and that was the blackboard (whiteboard). To illustrate the importance of whiteboards in educational Settings, whiteboards solve online communication problems. For example, a colleague explained to me the difference between MCU and SFU in WebRTC, and still had no idea what he was talking about after talking on the phone for more than ten minutes. Then we plugged into the whiteboard demo (above) and drew a few diagrams on the whiteboard. In just 2 minutes, I completely understood. This is the magic of the online education whiteboard, which makes online communication more efficient and modern education easier and more intuitive.

Seven Niuyun smart education solutions also include some very practical capabilities, such as Office components, which can use PPT or PDF functions to combine modern education and traditional education, and output educational resources more quickly and effectively. Such as courseware sharing ability. In the whole environment of online education, teachers can upload the documents prepared in advance, so that students can directly download the teacher’s lecture plan to review. For example, the whole learning process (teacher-student interaction scenes, whiteboard interaction records, classroom notes) can be recorded for students to review after class.

In addition, seven Niuyun smart education solution integrates AI to assist teaching to help teachers and students teach more effectively. For example, in traditional education, the teacher speaks too fast for the child to take notes in class. By using speech recognition, the teacher’s voice can be converted into text in real time to record, and then there will be text notes at the end of the class. Let me give another example of ai-assisted teaching ability. There is such a case in one-to-one teaching: a child said to the online foreign teacher, “You should stop teaching, I don’t want to teach, this lesson is my father asked me to learn, you earn your money, I go to play games. It turned out to be an ineffective classroom. This is where ai-assisted teaching capabilities come in. Both ends of the camera will detect whether there is no person’s head. If there is no face detected in more than one minute, the alarm mechanism will be triggered to inform the educational affairs to follow up the learning process. Ai-assisted teaching ability also included the number of times students raised their hands in math class 30 times, but sat in the back row to sleep in English class. Then our AI-assisted teaching system will recommend Zhang SAN to study science. The AI is to find students’ characteristics from a large number of low-density value data to assist students in making decisions.

Another is the application of big data in intelligent education. Traditional teaching can only record the semester grades and follow the students into the files. However, the data in the AI teaching system are collected, and each student has a large amount of data to follow, such as how many classes he skipped in college, which subject has special advantages in which period, etc., will be recorded. This can reflect students’ learning history more effectively and make teaching archives more complete.

Seven Niuyun · Wisdom education industry solutions

The first is online education enterprises. Now there are many online education institutions around us, especially in the past two years, which are particularly hot. Duda English, TopKid, and even online teaching children piano and painting have also developed. The second is double teacher education. For example, some children in the United States communicate with some children in China under the leadership of one teacher, and these children are assisted by teachers from two places, which is double teacher education. It’s hot right now in the US and China will soon follow suit. The third is vertical education. For example, long-distance medical teaching, mathematics teaching, programming teaching. Another is corporate training, which can be very effective in improving the efficiency of corporate meetings.