Premium Recording and Broadcasting System Solution
I. Industry Background
As a core pillar of national economy, education underpins domestic social development and future growth. Driven by booming information technology, high-quality lesson recording classrooms have gained strong policy support, technical advancement and market demand across China’s education informatization upgrade.
Chinese central authorities have rolled out successive supportive policies to boost digital education. The National Medium- and Long-Term Plan for Education Reform and Development (2010-2020) explicitly prioritizes education informatization and high-quality teaching resource development & sharing. Meanwhile, the Ministry of Education has issued guidance on modern distance education, accelerating infrastructure construction and popularization of intelligent recording classrooms, laying solid policy foundation for the industry.
Breakthroughs in internet transmission, audio & video codec and cloud computing fuel technical upgrading of recording classrooms. High-definition cameras, intelligent voice recognition and virtualization technologies are widely deployed to deliver crisp, stable and authentic recorded lessons; cloud storage simplifies resource archiving, centralized management and cross-campus sharing.
Rising public living standards stimulate diversified personalized learning demands. Recorded courses enable flexible anytime-anywhere review for students, and facilitate high-caliber teacher resource circulation to balance uneven educational allocation across regions.
II. Requirement Analysis
1. Multi-channel signal collection: Multi-channel AV and VGA capture system captures diversified classroom scenarios including teacher lecturing, blackboard writing, student Q&A, in-class interaction, courseware and computer screen content.
2. Automatic recording: Synchronously compile captured audio, video and screen signals into standard streaming files for live streaming, local storage, post-editing and on-demand playback.
3. Efficient monitoring & control: Support on-site director control and remote management over full recording workflow.
4. Curriculum resource management: Auto-generate standard course packages after recording and auto-upload to resource platform for cataloging, statistical analysis, online preview and file download.
III. Solution Design
1. Video Processing
A seven-camera layout is configured according to classroom dimension: six lenses covering teacher close-up, student close-up, full classroom view and blackboard view plus one HDMI channel for courseware. Smart human body analysis via panoramic cameras triggers auto camera tracking and scene switching. All cameras connect to HD recording host, supporting independent 1080P@60fps file storage per video channel.
2. Audio Processing
• Ceiling omnidirectional microphones with digital noise suppressors feed audio into recording host; wireless handheld microphone is equipped for teacher voice pickup and on-site PA.
• Professional speakers, power amplifiers and audio processors are deployed for classroom sound reinforcement; active monitors are installed in observation room for supervisors to listen to live teaching clearly.
3. Director Control System
• Embedded director management platform inside recording host supports two operation modes: local physical control panel on podium and remote web-based PC director.
• Integrated functions include scene switching between teacher/student/courseware feeds, logo & subtitle overlay, transition effects, volume adjustment, PTZ camera control and multi-screen layout configuration; remote subtitle editing is available via PC terminal.
• A dedicated control tablet is placed in observation room for one-click recording start/stop, quick scene switch, recording mode selection and preset position recall to eliminate invalid redundant footage.
IV. Application Benefits
1. Improve learning efficiency: Students review lessons at their own pace without time & location constraints to consolidate knowledge repeatedly.
2. Enrich teaching resources: Gather premium courses, experimental demos and case studies to satisfy personalized multi-level learning needs.
3. Upgrade teaching quality: High-standard recorded footage facilitates teacher self-review; learning data analytics helps teachers optimize teaching plans and classroom performance.
