Chinese name
Teaching recording and broadcasting system
trait
The cameras in the LAN can be configured in any way.
background
The development of education and science and technology.
type
software
eye
record
1
Basic introduction
2
Technology and characteristics
IP camera
Network multicast
continuous/sequential scanning
system composition
main feature
three
project management
1 Basic Introduction Editing
Construction background and demand
With the development of education and science and technology, traditional phonetic education can no longer meet the needs of diversified educational methods. Today's campus has been integrated with physical infrastructure such as roads, sports grounds and teaching buildings and IT infrastructure such as data centers, computers, routers and broadband. Based on this, the Genedu network interactive platform came into being. The system is a multi-functional integrated platform integrating multimedia network teaching, campus live broadcast, recording and broadcasting, campus video monitoring and other functions. Stable performance and reliable use. A set of equipment can realize campus multimedia teaching, live webcast, recording and broadcasting, electronic examination room, online class evaluation and other functions, which greatly improves the use efficiency of the equipment and makes the network multimedia classroom realize the characteristics of minimum investment and maximum benefit.
The teaching recording and broadcasting system needs to meet the following requirements: it can meet the recording and broadcasting functions at the same time; With its own data transmission channel, it can realize the transmission of PPT, electronic whiteboard and video stream at the same time; Meet the synchronous reception in the conference room and achieve good visual effects; High-definition image quality, clear sound quality; The automatic tracking and shooting system is simple and reliable.
2 technology and feature editing
Genedu video recording and broadcasting software, which can randomly configure cameras in the LAN, record multi-channel high-definition audio and video signals at the same time, and switch signals freely during playback. It can display many real-time video windows such as teachers' lectures, students' questions and answers, computer screens and blackboard writing. , and can select and control the camera pan/tilt and lens corresponding to each window video. Realize the switching and scheduling of four-picture, three-picture, two-picture and one-picture arbitrary pictures. Small-picture and large-picture videos can be switched with each other, which perfectly, truly and accurately shows the vivid scene of the interaction between teaching and learning.
IP camera
3 megapixel HD video, 16:9 display format. The front end of the high-definition intelligent recording and broadcasting system adopts a digital intelligent high-definition camera, which provides MJPEG: 3 million pixels 2048 x 1536 8fps, MPEG-410 million pixels 1280x720p( 16:9 display) 30fps. 1.3 million pixels 1280x960p (4:3 display) 30fps HD video image, video and audio signal acquisition, coding and transmission all-digital mode, terminal delay 100- 150ms.
Network digital high-definition camera integrates image sensor, image processor, video acquisition, video coding and other technologies into the front camera, and directly outputs coded and compressed digital signals, so that the camera can automatically track and shoot, and automatically focus, so that the teacher's image is always gentle and clear, and the tracked video image is clear and smooth.
Network multicast
Genedu HD intelligent recording and broadcasting system front-end equipment network digital HD smart cameras supports network multicast function. By turning on the network multicast function of the camera, the scene can be recorded on the Internet by synchronous multicast, and the intermediate equipment such as the forwarding server in the recording and broadcasting system composed of analog cameras adopted in the front end is omitted, so that hundreds of receivers can watch the high-definition video images of the recorded scene in real time through the network.
continuous/sequential scanning
The front-end equipment of Genedu HD intelligent recording and broadcasting system-network digital HD camera supports progressive scanning function, that is, simultaneously exposing and shooting a complete image. In the process of recording excellent courses, users can see the detailed features of moving objects and present smooth and delicate video images of excellent courses.
system composition
Genedu HD intelligent recording and broadcasting system front-end equipment network digital HD camera has built-in Web server and intelligent module, supports complete TCP/IP protocol suite, supports powerful digital video network transmission functions such as MPEG4-4 coding format, and a large number of intermediate hardware devices and system software, which not only reduces the overall cost of the system, but more importantly, the whole system becomes simpler, more efficient, more stable and more reliable.
main feature
Switch and schedule teaching scenes, realize multi-video window monitoring, and display multiple real-time video windows such as teachers' lectures, students' questions and answers, computer screens and blackboard writing. , and select and control the camera and lens corresponding to each window video. Realize the switching and scheduling of four-picture, three-picture, two-picture and one-picture arbitrary pictures. Small-picture and large-picture videos can be switched with each other, which perfectly, truly and accurately shows the vivid scene of the interaction between teaching and learning.
1, automatic tracking and manual tracking
The camera can automatically track and shoot all the activities of the teacher on the podium during the teaching, and can automatically adjust the focal length and focal length of the camera in real time according to the distance between the teacher and the camera, so that the image of the teacher is always gentle and clear, and the video images taken and recorded are clear, coherent and smooth. When students speak, turn on the microphone, and at the same time, the system starts the student camera, automatically tracks and locates the students who speak, automatically adjusts the focal length and focus, clearly records the speech, and vividly records the wonderful scene of the interaction between teaching and learning. Automatic tracking mode and manual tracking mode can be set, and teachers can choose to set any control mode according to their needs to perfectly record the teaching and learning process.
2. Multi-window display
While the teaching scene is broadcast live, the host computer records multiple monitoring video streams in real time, and each recorded video stream is a million-pixel high-definition image in the specified courseware directory, which truly and accurately records the wonderful teaching courses. When playing back the recorded courseware, multiple video streams can be displayed in different windows, and each video stream can be switched in the playback window. The videos played are all megapixel high-definition images, which vividly reproduce the interactive scene of teaching and learning.
3. Remote control management
Each network camera has a built-in multicast function, and students in the campus network can watch the teaching content online in real time through IE browser. The system has remote control and management functions. Through IP network managers can remotely control and manage multiple Genedu HD recording and broadcasting devices in the control center, which greatly improves the work efficiency.