The overall design topology diagram is presented as follows:

Interactive education MCU

As the core of the entire system, the headquarters has installed an 8-point high-definition interactive education MCU in the core computer room, such as remote classrooms and dual-teacher classrooms. Interactive education MCU can support 720P and 1080P interactive teaching scenarios. With a brand-new interface, convenient operation, powerful performance, and a safe and intelligent interactive experience, it provides teaching with a brand-new and valuable interactive video enjoyment.

Features and advantages

• Standard 1U hardware device, rack-mounted and suitable for large-scale network integration services.

• A single device can support up to eight 1080P recorded classrooms for simultaneous interactive teaching.

• It supports stacking and expansion of multiple devices.

• Hardware integration with an embedded operating system is secure and stable, effectively preventing hacker and virus attacks.

• The high-performance encoding card supports the H.264 High Profile protocol and can save 50% of bandwidth.

• It supports hybrid conferencing with high-definition, standard definition, multi-rate, and multi-protocol capabilities.

• With good compatibility, it is fully compatible with various H.323 and SIP protocols for terminals, MCUs, and gateways, providing good scalability for the system.

• It supports web-based control for remote management and maintenance.

• Access interactive recording hosts.

High definition education recording host

The host is positioned as a standard DSP pure embedded recording host with education 4K picture quality, H.323/SIP/RTSP four-way interaction, and an optional built-in audio processor as well as 7-channel resource synchronous recording. By utilizing automatic or manual guidance, it compresses and records various video signals in movie mode and resource mode. Moreover, it provides real-time storage, live streaming, and ring-out functions for various compressed video streams, achieving integrated embedded real-time guidance and recording functions.

Main hardware features

• The host is a professional device specifically designed for education recording and broadcasting applications, integrating functions such as supporting 4K synthetic encoding, 4K synthetic HDMI output, and RTSP/H.323/SIP multi-protocol four-way interaction. It also has an optional built-in digital audio processor.

• The host must integrate functions such as built-in recording, live streaming, on-demand, guide management, storage, and seamless switching into a single unit.

• The host adopts an embedded DSP pure hardware architecture and a Linux operating system. It is capable of working 24/7. The host has an aluminum chassis, and the equipment height is not higher than 1U.

• Video input interface: There are seven physical interfaces. Four channels are for high-definition camera 3G/HD-SDI input, one channel is for HDMI input interface, one channel is for VGA, and one channel is for YPBPR/CVBS/S-VIDEO signal input.

• Video output interface: Two high-definition output terminals can output two different images. There is one HDMI output terminal with up to 4K output support, and one channel of VGA with 1080P output.

• Audio interface: Two microphones can be connected to the built-in phantom power supply. There are three stereo line inputs, three line outputs, and one 3.5mm local headphone monitoring interface.

• Control interface: There are five RS232/RS485 serial ports and four USB interfaces, one of which supports USB 3.0.

• Network interface: There are two RJ45 LAN interfaces, one for recording and broadcasting network and one for audio processor control network.

• Encoding: It has one channel of 4K encoding or five channels of 1080p30fps audio and video encoding. It also has independent four-channel audio acquisition.

• Decoding: It has three channels of 1080p30fps audio and video decoding.

• Encoding format: Video supports optional H.264SVC/HP/MP/BP. Audio encoding format is AAC/G.711. Media file format is MP4. Video encoding stream is adjustable from 56Kbps to 16Mbps. Audio sampling rate is adjustable from 8 to 48Hz, and audio encoding rate is adjustable from 8 to 320Kbps.

• Screen synthesis: There is one channel of screen synthesis, providing multiple mode options such as 2/4/6/8/customization, with a synthesis resolution of 4K or 1080P settings.

• Optional audio processor module: It supports mixing grouping, automatic feedback suppression (AFC), automatic echo cancellation (AEC), and automatic noise cancellation (ANC).

• Remote interaction: It supports multi-protocol hybrid remote application modes such as RTSP/H.323/SIP. RTSP/SIP supports four-party interaction mode.

• Streaming protocol: It supports TCP/UDP/RTSP/RTP/RTMP/ONVIF/H.323/SIP/TS protocol.

• Storage: It comes with a standard 1T hard drive. It supports up to two SATA interface hard drives and can support a single 3T hard drive. It can achieve real-time storage of seven streams. It has functions such as viewing, downloading, and deleting individual video files in the device's webpage and output guidance interface.

Main features of built-in recording software

• The embedded recording and playback management software must be installed in the host. It is based on the dual management interface architecture of B/S and local HDMI/VGA video output GUI and is compatible with browsers like IE.

• The system encompasses functions such as video monitoring, video switching, pan-tilt control, audio adjustment, live streaming/recording, pause control, subtitles, logo, school emblem, live streaming monitoring, guidance, on-demand, and system settings.

• Video preview display: 

    a. It can provide real-time preview display of no fewer than seven high-definition videos and is capable of simultaneously handling SDI/HDMI/remote interactive mixed input.

    b. The recording method supports manual guidance switching control or seamless combination with the automatic tracking system to achieve fully automatic recording.

    c. Real-time display of recording information is available, which must include recording duration, video resolution, host IP, and other details.

    d. It is required to be able to display the hard disk capacity.

    e. It implements a real-time pre-monitoring function for at least seven channels.

• Pan-tilt control interface: Equipped with six preset numeric keys and an adjustable interface for up, down, left, right, close, and far adjustment.

• The recording mode supports two modes: movie mode and movie plus resource mode.

    a. The movie mode and resource mode can operate simultaneously. When recording a movie in resource mode, the resource mode works in the background. The broadcasting mode supports manual and fully automatic mode switching at will.

    b. The manual broadcast mode supports functions such as video preview, live output monitoring, video switching, audio adjustment, and recording mode switching.

    c.  It also supports manual PTZ control. Both teacher and student videos support multiple preset settings. It has a unified resource mode interface and movie mode interface.

    d. Select the channel that requires recording resources in the menu, and with just one click, open the movie+resource mode recording to simultaneously record PGM and resource recordings.

• The software comes with no less than four MCUs and supports all-directional interactive teaching.

• It supports interactive call protocols such as SIP/H323/RTSP/RTMP, supports call end communication book management, or enables one-click multi-terminal calling or hanging up.

• It supports the company's independently developed interactive teaching platforms or third-party video conferencing multi-point control units (MCUs) to achieve large-scale interactive teaching applications.

• It supports one-click Internet live broadcast for ten thousand people. Without the need to deploy other software and platforms, the recording and broadcasting host can realize the function of Internet live broadcast for ten thousand people.

• The software comes with an on-demand function, which supports up to five people simultaneously playing videos on the host.

• It supports functions such as course information, captions, Intro and Outro, and manually publishing subtitles to enhance the infectiousness of the courseware.

• It supports multiple switching effects, including mainstream switching effects like erase, fade in, and fade out.

• It supports remote FTP upload/download of videos with multiple upload modes such as after recording ends and at scheduled times.

• It supports multiple recording modes such as boot-up recording, scheduled recording, manual recording, and school-level platform system course schedule.

• It supports TS multicast streaming and enables more users to watch live broadcasts within the local area network.

  It requires audio and video synchronization of recorded files to meet the normal application of third-party editing software.

  
  

Configuration checklist