Method and device for transmitting and receiving video data packets

Abstract

The invention discloses a method and a device for transmitting and receiving video data packets. The method comprises the steps that a transmitting end places the video data packets to be transmitted currently into the cache of a retransmission thread, wherein the first predetermined number of video data packets transmitted currently are stored in the cache; the transmitting end sequentially transmits the video data packets to a receiving end in an order of continuously increased identification numbers, wherein each video data packet carries one identification number; the transmitting end receives a packet-loss feedback packet from the receiving end, wherein the packet-loss feedback packet carries the identification numbers corresponding to the video data packets not received by the receiving end; and the transmitting end analyzes the packet-loss feedback packet to acquire the identification numbers corresponding to the video data packets that are not received, extracts the video data packets from the cache of the retransmission thread according to the identification numbers and retransmits to the receiving end. By using the method and device, the packet loss probability in real-time video data transmission is well reduced, the problem of blocking of the videos is effectively solved, and the better user experience is achieved in video call.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for sending and receiving video data packets. Background technique [0002] To achieve real-time video on the mobile terminal, the most important thing is to ensure both smooth video and timeliness. To ensure timeliness, it is necessary to use the User Datagram Protocol (UDP) for communication. Although the Transmission Control Protocol (TCP) can guarantee the reliability of data transmission, there is a certain delay ( The length of the delay depends on the network conditions. If the network is good, the delay is very low. Once the network jitter occurs, the delay will increase, and it is possible to increase to 3-5s). [0003] The use of UDP communication can ensure the timeliness of data transmission, but because UDP is unreliable, there will be packet loss even in the best network. After testing, even in general good network conditions, there will be 0.5...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to disclose a method and device for sending and receiving video data packets, so as to at least solve the problems of high packet loss rate, serious video freeze and poor user experience in the related art when using UDP communication

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