In 2016, with the advent of the era of “Net Red Liveâ€, a large number of online educational institutions such as New Oriental, Sanhao.com, Hujiang.com, Xuesisi, and Dangdang Classroom competed to launch the live education business. The author's company has captured the trend of online education a few years ago. It has entered the HD education live broadcast market in China. Since the beginning of 2015, it has been the earliest in the industry with the high-definition remote classroom as the core. The exploration and solution run-in. Assisting in learning and thinking in 2015, the successful establishment of the school and thinking of the high-definition dual-class classroom model, created a precedent for the industry, the first to catch up with the live broadcast of education. Together with learning and thinking, we have first entered the market and users when the market is in chaos. As a pioneer in the industry, we have developed a first-mover advantage. Since 2015, Prospect Cloud has supported the development and construction of a high-definition interactive classroom model by top domestic educational institutions such as Gosi, New Oriental and Suntech. As a pioneer in the HD education live broadcast industry, along the way, countless pits, and successfully built a large number of high-definition education live rooms. The author knows the mystery and mystery of the implementation of HD live broadcast, and shares the “cheats†with the education industry and the industry partners who are interested in the live broadcast of the education! First, performance articles Live education, through the teacher live room, and the student-side HD classroom, the students and teachers are closely connected. The audio and video clarity and time delay performance received by the classroom students is the key to the feasibility of the HD education live broadcast mode, and also the core indicator of performance control. According to the construction practice of hundreds of live broadcasts in the foreground cloud, the video clarity is 720P and above, and the 720P and above have better human perception and clarity, and the classroom visual effect is more realistic. The video delay is required to be less than 200ms, so that when the students communicate with the teacher, the intuitive feelings of the lips and the sounds are completely synchronized, ensuring a clear and smooth teaching experience, so that both teachers and students can obtain high-definition interconnection, such as the on-site teaching effect. . The student-side classroom adopts a large-screen display to ensure that the teaching has the effect of teaching as a teacher. The current single-screen LED large-screen technology is relatively mature at around 80 inches. When the price is above 100 inches, the price of a single screen is more than 100,000 and hundreds of thousands. The price is unreasonable. It is proved by practice that the student's classroom display size is the best size of 85 inches. After adopting the large screen, the teacher and the real person who are seen by the student are guaranteed to be large. The teaching effect and visual experience are the same as the size of the teacher when the teacher explains it on the spot. Give students a more realistic teaching experience. Second, the cost of articles In the live broadcast, high-definition video requires transmission bandwidth guarantee, and the performance requirements for central video switching are also high. The current more feasible way is to use Internet bandwidth access and adopt the Internet cloud video switching center technology. This method can save expensive data private line access costs, and can be solved by using the current Internet office line. The uplink and downlink 2-4M Internet bandwidth can guarantee high-definition communication effect, saving tens of thousands of dedicated line access costs per port per year. The central video server adopts the form of a cloud server. It is not necessary to take an expensive MCU, and it is not necessary to build a professional server room of the central server. The expansion is more flexible and flexible. It can significantly reduce fixed asset investment and equipment depreciation, and does not require professional video server operation and maintenance personnel to maintain core video switching equipment, and the team's human resource cost is more economical. Third, the environment articles The construction of live broadcast and learning environment in the live broadcast of education is the key to ensuring the effectiveness of learning. The live broadcast and teaching environment are divided into two parts: the teacher-side environment and the student-side environment. 1) Classroom side environment: Select the dual stream (the teacher can teach the PPT and the teacher portrait to the student side simultaneously) video codec terminal, and use two large-screen displays, one to play the teacher portrait and one to play the PPT. When students see the teacher's speech, they can also see the lecturer's portrait and the lecturer's blackboard on the blackboard to ensure the richness of the teaching scene and present a complete teaching environment. The classroom side voice uses ceiling microphones to ensure complete pickup of the entire classroom, allowing students to communicate in real time with remote teachers. The high-definition camera is arranged on the classroom side, and the pictures of the students on the classroom side are taken and sent to the remote teachers, so that the remote teachers have the feeling of control and influence on the classroom, enhance the teacher's control over the classroom, and bring a more intuitive teaching experience to the teachers. . According to the practice of foreground cloud, the teaching effect of two-way video interactive classroom is much higher than that of one-way live classroom. The main reasons are three: 1) teachers can see students and have a stronger sense of presence; 2) students can use video The form of the question to the teacher, there is a stronger sense of participation; 3) other students can see the real-time picture of the students, can learn from other people's learning experience. 2) Teacher side environment: deploy HD camera, and provide the teacher with high-definition picture quality through this camera. It is required to see high-quality teacher images on the student side, including clarity, color reproduction, and picture coordination, etc., which require high quality. This camera is very close to the teacher, so the camera's long-distance shooting performance, large format shooting performance and so on are not high. According to the practical experience of the foreground cloud HD live classroom, in the teacher environment, the teacher should be placed directly on the opposite side of the screen to play two large screens, one screen to play the teacher's own teaching screen, so that the teacher has their own teaching status and the integrity of the picture in the lens. A clear understanding; another large screen to play the student's picture, so that the teacher can visually observe the class status of the students in the classroom, have an intuitive understanding and understanding of the students' responses, in order to more effectively interact with the students, control the classroom rhythm and the teaching effect. Behind the teacher is a blackboard or a handwritten big screen, which is used as a teacher's blackboard tool. The teacher can look at the courseware through the word-raiser, so that the instructor can easily read his own lectures without affecting the real-time video live interactive effect on the teachers, and there will be no phenomenon of interrupting the lecture rhythm, such as bowing the lectures, and guaranteeing the live broadcast of the lectures. Coherence. The teacher's teaching aids can be presented to the students through the form of physical exhibitions to assist the teaching effect. The pictures of the physical exhibition booth can be transmitted to the students through the codec terminal. Fourth, the mode articles There are various development modes for live lectures between teachers and students, specifically the following three categories. 1) The teacher is in a small live room and the student is at the remote standard classroom. It is suitable for teaching in social education institutions. Professional teachers teach in small teachers' live broadcasts in social training institutions. Students can teach in the remote classrooms in the same city or in different places to ensure interactive effects. A teacher can bring about 10 classrooms; Regardless of the interactive effect, the number of classrooms a teacher can bring is not online. A classroom instructor is required at the classroom to control the discipline and rhythm of the classroom, to manage the interaction between the classroom students and the teachers in the live broadcast, and to assist the students in completing the classroom tasks assigned by the lecturers. 2) The teacher is in a small live room and the student is on a personal client. It is suitable for teaching in social education institutions. Professional teachers teach in small live broadcasts of social training institutions, and students learn independently on individual clients. Applicable to one-to-one, one-to-one, one-to-one countless classes of different sizes. One-on-one, is a high-end one-on-one teaching counseling, such as foreign language teaching, professional art teaching, extracurricular classes, etc.; one-to-one, small class, all students can interact with the teacher for high-definition video, with good interaction Sexuality and participation are also high-end courses; one is countless, large class, only a few students can interact with teachers HD video, teachers need to help to screen and manage the problems of students, manage the interaction between students and teachers, apply to low A large-scale course. Prospective cloud and partners use this model in the teaching practice of international model classrooms, master classes, comprehensive social practice classes, and IT training classes. 3) Teachers teach in HD classrooms and students study in HD classrooms. Applicable to regular schools within the system, as well as social training institutions, that is, the dual-teacher classroom mode. There are teachers and students in the classrooms, and there are also tutors and students in the teachers. It mainly solves the problem of imbalanced educational resources, such as the scarcity of quality education content or the scarcity of quality teachers. The primary and secondary school teachers in the system are taught in the high-definition classroom of the school. The course content is transmitted to the remote branch school or the educational resource sharing school. For example, the famous schools in Beijing and the schools in the west are paired up to share educational resources and help. The dual-teacher class is especially suitable for the reform of the teaching mode of social training institutions, in order to solve the problem of the shortage of excellent teachers, and the problem of high-quality teachers teaching content to the second and third-tier markets, which can effectively help social training institutions to achieve the subversion and transformation of business models. Expand market coverage, increase market share, improve teaching quality, and address the painful points of excellent teacher resources. 2016 is a year of online education reform in China. It is also a year full of opportunities. The live broadcast of education has become an artifact in the industry. The wave of live broadcast has obviously affected and changed the business model of the industry and the behavior habits of learners. Live broadcast of education, set sail in the wind! 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