A wireless network-based video data packet transmission method and system
A wireless network and transmission method technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problems of poor video quality and low channel utilization, and achieve the effect of improving quality and channel utilization.
Active Publication Date: 2018-12-28
TSINGHUA UNIV
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Problems solved by technology
[0011] The technical problem to be solved by the present invention is: the existing wireless network-based video data transmission method has low channel utilization and poor video quality
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[0061] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0062] In a wireless multi-hop network, the node that generates video data is usually called a source node, and the node that receives video data is called a sink node or a destination node, and other nodes act as forwarding nodes.
[0063] Figure 4 It is a schematic diagram of a method for transmitting video data packets based on a wireless network according to an embodiment of the present invention. like Figure 4 As shown, the wireless network-based video packet transmission method includes:
[0064] S41: the source node extracts metadata of the current video frame;
[0065] S42: The source node obtains the weight of the data packet in the current video frame according to the metadata and the type of the video frame data packet;
[0066] S43: The forwarding node or the destination node schedules each data packet into different priority queues acc...
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The invention relates to a video data packet transmission method and system based on a wireless network. The method comprises that a source node extracts metadata of a current video frame; the source node obtains the weights of the data packets in the current video frame according to the metadata and the types of video frame data packets; a forwarding node or a destination node schedules each data packet in different priority queues according to the weights of the data packets in the current video frame and the length of each priority queue, thus transmitting the video data packets; wherein the metadata comprise a video frame structure, a video frame type and the location of the video frame in a GOP (Group of Pictures); and each video frame is divided into a frame header data packet and frame content data packets. According to the method and the system provided by the invention, the data packet with the higher weight can be sent through the high priority queue in a greater probability; the probability of the data packet with the lower weight to compete for the high priority queue is relatively low; the channel utilization rate is improved; and the video transmission quality is improved.
Description
technical field [0001] The invention relates to the technical field of wireless network video transmission, in particular to a wireless network-based video data packet transmission method and system. Background technique [0002] The networked and digitized future industry puts forward higher requirements for industrial production monitoring. Video surveillance has become one of the most important and commonly used monitoring means because of its richness of information and user friendliness. However, in many industrial productions in extreme environments, such as oil fields, mines, etc., it is often difficult or even impossible to deploy wired video surveillance systems. In this scenario, the video transmission and monitoring system based on the wireless multi-hop network has unique application advantages. [0003] However, there are many challenges in deploying wireless multi-hop video transmission systems under extreme conditions. In particular, deployment environments...
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IPC IPC(8): H04N21/643H04N21/647
CPCH04N21/643H04N21/64784H04N21/64792
Inventor 吴陈沭杨铮刘云浩苗欣马强杨超凡
Owner TSINGHUA UNIV