The Experimental High School Affiliated to Beijing Normal University is the first batch of demonstration high schools in Beijing, the experimental base for the reform of middle school education by the Ministry of Education and Beijing Normal University, and the cradle for training excellent middle school students. The experimental middle school is divided into high school (headquarters) and junior high school (branch school). This time, a total of 96 classrooms were built for the school headquarters and branch schools. This large-scale construction of multimedia recording and broadcasting systems is second to none in Beijing schools. The school evaluation expert group After performance demonstration and market comparison of similar products, combined with the actual use needs of the school, Ruiqu multimedia education recording and broadcasting system successfully won the bid with the advantages of high reliability, scalability, and large-scale networking. The experimental middle school recording and broadcasting system affiliated to Beijing Normal University The successful construction of the company marks a further step in Ruiqu multimedia recording and broadcasting in the field of education.
Reach, as a leading provider of products and solutions for visual information recording and dissemination in the industry, has launched a recording and broadcasting solution for the education industry centered on "Easy Recording-Multimedia Recording and Broadcasting System", focusing on the "knowledge recording and "Dissemination", with "students as the guide for the construction of teaching resources", provides educational institutions with low-cost, high-efficiency, resource-building means suitable for integration into normal teaching, effectively solving the problems of multimedia teaching resources generation, dissemination and management The construction of teaching resources in educational institutions such as universities, colleges and schools.
ã€Project Requirements】
A total of 96 classrooms including ordinary classrooms and professional classrooms in No. 3 teaching building, No. 4 teaching building, experimental building and junior middle school teaching building affiliated with the Experimental Middle School affiliated to Beijing Normal University are constructed with multimedia video recording and broadcasting systems, and each ordinary classroom has 2 roads. The video signal and 1 channel VGA signal are the teacher's picture and the student's panoramic picture, and the lecturer's computer VGA picture. The professional classroom is set up with 2 channels of video + 1 channel of VGA and 3 channels of video + 1 channel according to the different professional content. VGA combination; the entire recording and broadcasting system integrates monitoring, recording, and micro-teaching and analysis. It can be used for teaching analysis and storage as school resources. The system can be managed centrally and controlled separately without affecting the normal teaching order , The system supports the remote control function of the camera, the camera can be controlled remotely in the system console, you can use software control, also supports hardware rocker control, lens focal length change control and flexible and accurate rocker control. At the same time, the system can support the simultaneous recording and live broadcast of teacher images, student images and computer screens in 16 classrooms, comprehensively record the teaching situation, and instantly generate multimedia teaching courseware.
The classroom distribution is as follows:
ã€solution】
The engineers of R & D organized research and development, design, pre-sales and other aspects of the needs analysis and field visits. Combining the characteristics of up to 96 classrooms and the separation of the classrooms in the campus and the branch campus, we proposed the use of R & D’ s independent research and development. Distributed multimedia recording and broadcasting system to meet the needs of large-scale classroom layout recording and broadcasting system affiliated to Beijing Normal University Experimental Middle School. The system structure drawing is as follows:
Topology diagram of recording and broadcasting system of experimental middle school affiliated to Beijing Normal University
The system is mainly equipped with the latest video and audio encoders and multi-channel encoders in the general classrooms and professional classrooms of the headquarters and branch schools. The video and audio encoders mainly collect teacher video signals; the multi-channel encoder mainly collects student videos and teacher computers VGA picture signal; each floor of the teaching building is equipped with a Gigabit floor switch, and the signal collected by the encoder sends the encoded code stream to the recording and broadcasting server through the network for storage.
A control room is set up on the seventh floor of the school building of the school headquarters. The control room can manage and control all classroom equipment of the school and the branch school. The control room is installed with two Ruiqu educational multimedia recording and broadcasting servers. The stream is sent to the server through the campus network for integrated recording. At the same time, in order to facilitate the management and control of the entire system, we configure a comprehensive management platform for the multimedia recording and broadcasting system, which can manage and control multiple servers in a unified manner and can be accessed by users in the network. The recording server provides a unified access port to meet the needs of large-capacity users on the network for live broadcast and on-demand; in order to meet the monitoring function of 96 classroom signals, the system is equipped with the classroom visual management platform of the sharp recording and broadcasting system. It can easily realize the monitoring function of the video signal and the computer VGA signal, and it is convenient for the school competent department to supervise the teaching process in time. The computer installed in the control room can realize the remote control of the cameras in all classrooms. At the same time, the system is equipped with a hardware joystick. The network of the recording and broadcasting system can also remotely Precise control, to achieve a groundbreaking camera control software and hardware combination.
The entire recording and broadcasting system combines hardware and software with a control mode and simple operation. It is a modern recording and broadcasting system tailored for customers, which greatly improves the school's information construction level.
Control room picture 1 Control room picture 2
ã€Characteristics】
1. High-quality and high-resolution recording
Because the control room and the classrooms of each teaching building are far away from the network of the branch campus, how to ensure the image quality is the key to the construction of the entire system. This system uses the latest high-performance DSP encoding chip and uses the most advanced H.264 video The coding technology guarantees a high-quality image effect with a very low bit rate.
2. Distributed architecture, modular layout, centralized control to meet the needs of later expansion
The system adopts a distributed architecture, modular layout, encoders arranged in the classroom and the multimedia server installed in the control room are deployed separately, and signal combination recording can be performed at any time according to the requirements of course recording. The integrated management platform and visual management platform installed in the control room can Centralized remote centralized control and management of the entire system, a single server can be expanded to the recording of 8 classroom signals, and the visual management platform supports up to 64 screens of monitoring, which provides convenience for the expansion of the system.
3. The combination of software and hardware control of the camera
This system pioneered the design of a combination of software and hardware to control the camera; software mode, using the camera control program that comes with the multimedia recording and broadcasting system software, can achieve precise control of the camera on the computer. Hardware mode: The system has designed two control joysticks. The joystick is connected to the computer through the COM port to realize the docking with the visual management platform. The control of the camera can be transferred to the joystick control. The joystick completes the camera control operating.
Joystick controller and HD decoder to decode the picture
4. HD decoder
This system uses the latest HD hardware decoder developed by Ruiduo, which is mainly arranged in the control center to realize the decoding of the recorded video files (as shown above). It supports remote control operation, which is more flexible and convenient than using the PC reception method. It is especially suitable for occasions where it is not convenient to use PC to receive recording and broadcasting signals.
5. Large-capacity live on-demand
In order to satisfy the teachers and students of the Beijing Normal University affiliated experiment in real-time viewing of the teaching process and after-class reading and viewing, this system is equipped with a large-capacity live on-demand platform, which can meet the large-capacity live-on-demand demand of teachers and students.
ã€Conclusion】
Through the cooperation of our technical engineers and integrators, the installation and commissioning of the entire system has been completed. The system is stable and has good results. It has been fully affirmed by the users. Our project implementation engineers are diligent and diligent and fully cooperate with the integrator project The implementation has been greatly recognized by customers and integrators. At the same time, Reach continues to uphold the vision of becoming the world's leading provider of visual information recording and dissemination, products and solutions, and will always provide customers with the best solution efforts.
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