Video data transmission system and method for network video conference
A video data transmission and network video technology, applied in the field of video transmission, can solve the problems of fewer clients, limited number of users, waste of resources, etc., achieve the effects of reducing workload, improving high-definition video capabilities, and improving utilization
Inactive Publication Date: 2009-01-21
GUANGDONG VTRON TECH CO LTD
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Problems solved by technology
[0004] (1) The MCU concentrates on encoding, decoding and screen mixing, resulting in a very limited number of users it can carry. For example, using the H.323 protocol, the MCU can support 16 video channels, but in actual use, it can only Support 4-channel HD users, or even less;
[0005] (2) In the network video conferencing, the work undertaken by the client is relatively small, resulting in a waste of resources;
Therefore, in the high-definition video conferencing system, this defect is intolerable
Method used
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[0037] figure 2 The shown video data transmission system of the present invention for network video conferencing includes MCU and 4 clients, namely includes client 1, client 2, client 3, client 4, MCU, client 1, 2, 3 , 4 are respectively connected to the MCU network.
[0038] The MCU includes at least a virtual channel forwarding module and a virtual channel logic control module, and may also include other modules of a traditional MCU except codec and screen mixing.
[0039] Each client includes a sequentially connected camera, a video encoder, and a virtual channel sending management module, and also includes a sequentially connected virtual channel receiving management module, three video decoders, and a display device.
[0040]The virtual channel transmission management modules of each user end include an encoder and a network transmission device connected to each other. The encoder is mainly used to mark the virtual channel identification information. The virtual channel...
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The invention provides a video data transmission system which is used for network video conference and comprises an MCU and at least two client sides; every client side is separately connected with the MCU network and the client sides both comprises a cameral, video coders, a virtual channel transmission and management module, a virtual reception module, video decoders and a display device which are connected in turn; both ends of every video decoder are separately connected with the virtual channel reception and management module and the display device. With the invention, the coding and decoding task is distributed to every client side which effectively promotes the utilization rate of the system resources, and more client sides can participate in video conference; in this way, the primitive resolution of video data could be ensured and the performance for supporting high-definition video is greatly enhanced.
Description
technical field [0001] The invention relates to the field of video transmission, in particular to a video data transmission system and method for 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 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 standard, among which the H.264 standard ...
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IPC IPC(8): H04N7/15
Inventor 徐蜀中朱小华
Owner GUANGDONG VTRON TECH CO LTD