Wireless video transmission system based on TD-LTE emergency communication
A wireless video and emergency communication technology, applied in transmission systems, closed-circuit television systems, electrical components, etc., can solve problems such as inability to move dynamically, rigid transmission methods, infrastructure damage, etc., to prevent coverage loss, improve computing power, The effect of preventing out-of-order situations
Inactive Publication Date: 2017-02-15
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
The traditional video collection points are all fixed cameras, and the collected video data is transmitted to the monitoring command center through Ethernet. This transmission method is already too rigid. Dynamic movement; second, the infrastructure in this way is easily damaged. Once the main line or an important forwarding node is broken, the entire video transmission system will be paralyzed, and the TD-LTE wireless network is used as the transmission channel avoid these disadvantages
Generally, in the process of multi-thread processing, after the sub-thread is created, the survival of the thread must be maintained through a loop. In order to prevent the sub-thread from occupying system resources, a sleep mechanism will be added to the sub-thread. However, in the receiving process of the video transmission system , if the sleep function is added, the data packet will be lost, and in severe cases, the picture will be distorted
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[0025] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.
[0026] Such as figure 1 , 2 As shown, the wireless video transmission system based on TD-LTE emergency communication includes at least one mobile communication terminal, base station and monitoring center. Each mobile communication terminal will know the network information of the monitoring center in advance and will be registered in the database of the monitoring center. The mobile communication terminal sends its own network information to the monitoring center at a certain time period, and the monitoring center also continuously Detect the list of online users. If the time exceeds a certain range, the monitoring center has not received the network information of a ...
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The invention provides a wireless video transmission system based on TD-LTE emergency communication. The system comprises at least one mobile communication terminal, a base station and a monitoring center. The mobile communication terminal is used for collecting video data, compressing and encoding the collected video data, and transmitting the compressed and encoded video data to a base station through a TD-LTE wireless communication network. The base station is used for receiving the compressed and encoded video data transmitted by the mobile communication terminal, and transmitting the compressed and encoded video data to a server of the monitoring center through the TD-LTE wireless communication network for decoding and displaying. According to the invention, the user interface thread of a message response mechanism is used for receiving; packet loss caused by a traditional thread which uses a circular matching sleep function can be effectively solved; the frame information and the packet sequence of the data packet are detected on a receiving end to determine the storage location of each video packet in a circular linked list to prevent chaos caused by a UDP transmission protocol.
Description
technical field [0001] The invention belongs to the technical field of real-time video transmission, and in particular relates to a wireless video transmission system based on TD-LTE emergency communication. Background technique [0002] With the continuous development of science and technology, people pay more and more attention to the rescue process of fire, earthquake, attack and other emergencies. A general rescue communication system includes a monitoring center, several on-site video collection points, and several call terminals that accept voice commands. The traditional video collection points are all fixed cameras, and the collected video data is transmitted to the monitoring command center through Ethernet. This transmission method is already too rigid. Dynamic movement; second, the infrastructure in this way is easily damaged. Once the main line or an important forwarding node is broken, the entire video transmission system will be paralyzed, and the TD-LTE wirel...
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Login to View More IPC IPC(8): H04N7/18H04L29/06
CPCH04N7/18H04L65/764
Inventor 余翔张海波柯文韬
Owner CHONGQING UNIV OF POSTS & TELECOMM