Video data transmission system and method used for large-scale high-definition network video conference

Abstract

The invention provides a video data transmission system for a large-scale high-definition network video conference. The system comprises one MGR, at least two entity MCUs and more than two clients; the MGR and each entity MCU are respectively in network connection, and each client and the entity MCUs are respectively in network connection; each client comprises a camera, a video coder, a virtual channel sending management module which are connected in sequence, and a virtual channel receiving management module, a video decoder, a display device which are connected in sequence, and the two ends of each video decoder are respectively connected with the virtual channel receiving management module and the display device; each entity MCU comprises a cluster management module, a virtual channeltransmitting module and a virtual channel logic control module. The video data transmission system effectively improves the resource utilization rate of the system, reduces the workload of logic MCU and each entity MCU, can ensure the original resolutions of the video data in the large-scale high-definition network video conference, and greatly improves the capability of supporting the high-definition video.

Description

technical field [0001] The invention relates to the field of video transmission, in particular to a video data transmission system and method for large-scale high-definition network video conferencing. Background technique [0002] The network video conferencing system realizes virtual meetings through network communication technology, so that geographically dispersed users can gather together in one place, exchange information through graphics, sound and other ways, and support people to exchange and share real-time information and carry out collaboration at a distance. working application system. Network video conferencing greatly facilitates the real and intuitive communication between collaborative members, and plays a decisive role in distance teaching and meetings. The standards and protocols adopted by the network video conferencing system are mainly formulated by ITU-T according to the needs, including: H.320 protocol, H.323 protocol, MPEG-4 standard and H.264 stand...

AI Technical Summary

Problems solved by technology

[0004](1) Expanding the MCU by stacking enables the expanded logical MCU to bear more users, but since each physical MCU in the system needs to undertake coding, Decoding and screen mixing work, so that its scalable scale is still limited, and the maximum expansion scale for high-definition users is about 300 MCUs;

[0005](2) In network video conferencing, the user terminal undertakes relatively little work, and the incomplete utilization causes the waste of this part of resources in the entire system;

Therefore, in large-scale high-definition network video conferencing systems, this defect is intolerable

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