Practical application:

By using the four stages of recording, recording, broadcasting, and managing in the recorded classroom, we can meet the needs of educational informatization construction for application construction, fully unify network construction and application construction, and completely eliminate the problem of campus network usage without any available applications; Solve the problem of schools lacking practical teaching resources for a long time, and students being unable to review the content of this class after class. In order to ensure the normal teaching of teachers and reduce the complexity of teachers' operation, this scheme is a full-automatic real-time recording and broadcasting system. The full-automatic recording and broadcasting system mainly completes the automatic tracking and collection of teachers' and students' videos, intelligent collection of audio, interception of teachers' computer screens, and intelligent guidance of teachers'/students' videos/computer images. The above signal sources are automatically transmitted to the courseware real-time recording system to generate high-quality high-quality courses. At the same time, through the live broadcast system in the classroom, online real-time learning platforms are provided for remote users.

System topology diagram

Video collection for teachers/students/blackboard writing

The intelligent recording and broadcasting system adopts two binocular tracking cameras, one for teacher tracking cameras and one for student tracking cameras. In addition, a blackboard camera and a blackboard locator are configured to capture close-up images of the blackboard, and six positions are used for recording. The intelligent recording and broadcasting host is connected to these four cameras and automatically adapts to the resolution of the cameras, supporting 1080P, 720P, etc., with an SDI interface.

Audio collection for teachers/students

The boutique classroom uses 8 hanging microphones to complete all audio collection in the classroom through an external audio processor or mixer. At the same time, the output of the external audio processor or mixer is sent to the Line port of the intelligent recording host.

HDMI/VGA/YPbPr/CVBS courseware PPT or courseware computer collection

Lead out the video signal of the teaching computer and connect it to the courseware PPT input port of the intelligent recording and broadcasting host, and the courseware will be collected by the intelligent recording and broadcasting host. Supports signal source interfaces such as HDMI/VGA/YPbPr/CVBS.

Teacher automatic tracking

By setting an effective tracking area for the binocular tracking camera, when the teacher is active in the podium and student area, the tracking camera automatically recognizes the teacher's position through image information analysis, sends tracking information to the intelligent recording host, and the intelligent recording host completes the strategy switching of movie simulation videos.

Student automatic tracking

The student binocular camera has schemes such as dual overhead, side overhead, and single overhead, covering the student area. When the student stands up, the tracking camera automatically recognizes the student's standing position by analyzing the image information input from the positioning camera, sends tracking information to the intelligent recording host, and the intelligent recording host completes the strategy switching of movie simulation video.

Automatic detection of blackboard writing

The blackboard detection machine analyzes the image information of the blackboard area, identifies whether the teacher has written on the blackboard, sends tracking information to the intelligent recording host, and the intelligent recording host completes the strategy switching of movie simulation videos. When using a blackboard for detection and writing, the tracking strategy switches to teacher close-up videos.

Automatic broadcasting system

The intelligent recording and broadcasting system supports three broadcasting modes: automatic broadcasting, manual broadcasting, and semi-automatic broadcasting.

Automatic guidance: The automatic guidance switching strategy is achieved through the cooperation of two binocular cameras and the PPT detection of the courseware provided by the recording host (in addition to an optional blackboard detection machine).

Manual guidance: Stop binocular tracking, courseware PPT detection, and blackboard detection, and purchase all intelligent recording hosts to switch between dragging guidance in the guidance interface.

Semi automatic broadcasting: binocular tracking, courseware PPT detection, blackboard detection system maintains tracking operation, intelligent recording host filters out all detection instructions, and does not switch detection instruction tracking strategies.

Automatic broadcasting

The high-definition embedded integrated intelligent recording and broadcasting host can freely set the system's guidance strategy and control the system to automatically guide, forming a movie mode audio and video signal. The default guidance strategy of this system is

Teachers use computer courseware with the highest teaching level

The level of interaction between students standing up and teachers is secondary

Teachers give lectures on the podium at a regular level

Manual guidance

Binocular tracking, courseware PPT detection, and blackboard detection system maintain tracking operation. The intelligent recording and broadcasting host filters out all detection instructions and does not switch detection instruction tracking strategies, using drag and drop guidance switching.

Course recording system

The high-definition embedded integrated intelligent recording and playback system supports movie mode and multi split screen mode recording. The intelligent recording host automatically records the movie mode audio and video, teacher's lecture audio and video, teacher's computer courseware audio and video, blackboard writing video, student's speech audio and video, and multi screen audio and video formed by the guide as independent files in the same folder of the intelligent recording host.

Single machine four party interactive teaching

Equipped with a built-in four point MCU, it enables interactive teaching between recording hosts. By adding a communication record, the recording host can input remote interactive hosts in advance in the form of a communication record, reducing the complexity of identifying classrooms through IP addresses. Further call remote 1, 2, and 3 parties through SIP/RTSP/H.323 to achieve mutual teaching among the four parties. By calling three remote screens, achieve peer-to-peer multi screen interactive teaching. Multi angle remote audio and video flexible access.

Network live streaming system

The recording host has dual functions of online live streaming and remote push, which means that during online live streaming, it can push another audio and video stream to the wide area network server, forming a large-scale network application. Users can directly receive and watch on the campus network/metropolitan area network/wide area network through a browser or PC client, effectively balancing the live streaming of the school and between schools, and meeting the needs of users with different network bandwidth. The recording host also has a small studio function, which can achieve video conferencing applications and support point-to-point and point-to-point classroom broadcasting between recording hosts in campus networks/metropolitan areas/wide area networks.

Users can set the recording host as follows according to their needs:

Live streaming settings

Movie Mode

Live streaming multi split screen mode

Live remote reception and viewing

Browser remote live streaming and on-demand

Users do not need to download any plugins or client software, and can directly watch videos using the IE browser. When the recording host broadcasts live, the video will be transmitted to the streaming server through the network, which is called streaming. The streaming media server can provide users with remote live streaming and on-demand functions through audio and video processing. When users watch remote live videos smoothly, the video image delay does not exceed 5 seconds.

resource management

The comprehensive recording and broadcasting business application system provides convenient course resource management methods. Authorized users can easily add, modify, and delete resources, as well as classify them.

user management 

Authorized users can modify and authorize established roles such as teachers, students, etc. in the User Management Role Management interface, as well as add new roles and perform modification, authorization, and deletion operations. They can also view the number of users within each role.

Teaching management

After the recorded video is automatically uploaded to the platform, users can intuitively see the latest updates, hottest videos, favorite videos, as well as the on-demand and favorite ranking on the right side. While browsing the video resources, users can also star, comment, view micro videos, view related resources, and download attachments for later on-demand resources. Teachers with corresponding permissions can initiate teaching evaluation tasks, issue multiple tasks, involving multiple evaluated teachers and members of the teaching evaluation expert group. After receiving the message (task), the members of the teaching evaluation expert group began to execute the task and provide feedback on the teachers in the task. Members of the expert group can watch the teaching video of the evaluated teacher during the review process, rate and comment on the teaching video, and point and comment on it in the video. After all operations are completed, save and submit it. All evaluated teachers and their videos will eventually have corresponding review reports to record their growth process. The average score of each teacher, the score for each stage (semester or academic year, etc., time can be customized), the total score, the score for each participating video, and relevant comments are all recorded. The corresponding report can also be exported to Excel for reference.

    Recording and broadcasting equipment control system

course management

In addition to managing users, the platform also supports managing the organizational structure of the entire course. It is convenient to add and modify the names of colleges, majors, departments, etc.

Micro video applications

Teachers with corresponding permissions can create and publish micro videos of recorded teaching videos.

Micro video publishing and on-demand: Users can enter the micro video mode and play the micro video by selecting the "tag" on the right side of the video during video on-demand browsing. If you click on the video playback progress bar while watching and browsing, you can exit the micro video mode and enter normal playback mode.

Micro videos help users understand the key points of the video to a certain extent, saving them time watching and learning, and improving learning efficiency.

Online live streaming

The entire system provides a unified user access end, which only requires the use of IE and authorized login to access the corresponding live streaming resources online.

    Illustration: Online live streaming

Online on-demand

The course resources generated by the system will be automatically uploaded to the media server to form on-demand resources. After logging in, users can access the corresponding course resources according to their permissions.

    Illustration: Multi perspective online on-demand

Online editing

In order to improve the overall quality of course resources and avoid invalid images in course resources. The system provides online editing function. After the class teacher passes the IE login system, they can perform secondary editing operations on their courses. The entire editor adopts online running technology, without the need to download courseware separately, greatly saving network traffic and improving work efficiency. After online editing is completed, it can be provided to students for online on-demand access after being reviewed and published.

Mobile browsing

This system not only supports browsing teaching videos in fixed places such as teacher offices and student dormitories, but also meets the needs of students for targeted review or preview in public places such as campus playgrounds, canteens, buses, and subways. Support browsing instructional videos on iPhone, iPad, and Android mobile clients.

Figure: Client browsing

Personal Space

The system supports the function of personal space, mainly displaying the user's personal information, as well as personal resource and comment management. At the same time, it can display all the videos that the user has watched and the resources uploaded to the platform.

Other functions

1) Announcement Management

Through the platform announcement function, some public information can be notified to users or visitors on the website. Announcements are an important channel for a website to publicly disclose information.

2) Online statistics

Through the platform display, users who are currently watching resources and courses can be viewed (only those who have watched are displayed. Those who have not watched are not displayed). And provide the function of querying based on conditions.

3) Famous Teacher Classroom

Famous Teacher Classroom is used to display the personal information of all famous teachers. The above are recommended teachers, and information about famous teachers can be queried based on schools and categories.

4) Topic List

The topic list is compiled at different times to launch targeted topic content, making it convenient for users to view it at the first time.