Video data transmission method, device and system

Abstract

The invention provides a video data transmission method, device and system. The method comprises the following steps: determining a frame type of a current to-be-transmitted video frame by a sending end, and sending the video frame to a receiving end; when the frame type of the video frame is determined as an I frame, receiving a feedback message of receiving condition of the I frame returned by the receiving end; performing corresponding operation processing on the I frame according to the feedback message until the receiving end returns a feedback message indicating the reception of the I frame, sending the next frame of the video frame to the receiving end, wherein the operation processing comprises: deleting the I frame from an I frame transcript chain table, or sending the I frame to the receiving end again. In the video data transmission method, device and system provided by the embodiment of the invention, on the basis of the non-connection transmission protocol, a reliable data transmission mechanism is adopted for the I frame so as to ensure the regularity and the integrity of the key frame of the I frame on the premise of guaranteeing the delivery rate of the video data transmission, and relieve the phenomena of smearing and blurred screen in a video playing process in the case of instability of a current network.

Description

technical field [0001] The present invention relates to the technical field of data transmission, in particular to a video data transmission method, device and system. Background technique [0002] At present, RTP (Real-time Transport Protocol, Real-time Transport Protocol) is mainly used in the data transmission process. It is a real-time transport protocol developed by IETF. It works on a connection-oriented or connectionless lower layer protocol, and mainly realizes an end-to-end multimedia The flow synchronization control mechanism does not need to establish a connection in advance, nor does it require the participation of intermediate nodes. Among them, RTP can use TCP (Transmission Control Protocol, Transmission Control Protocol) as the transmission protocol, and RTP can also use UDP (User Datagram Protocol, user Datagram Protocol) as the transport protocol. [0003] At present, a video data transmission method is provided in related technologies, which mainly include...

AI Technical Summary

Problems solved by technology

However, these mechanisms are guaranteed by a large number of confirmation messages, retransmission messages, and CPU calculations, which cause the TCP protocol to have the disadvantages of slow transmission speed and low efficiency; in addition, a typical TCP problem is head-of-line blocking. Because the TCP protocol is transmitted in sequence, it can be understood as a first-in-first-out queue. When the previous data is lost, the subsequent data can only wait for the previous data to recover before going out of the queue for subsequent operations. When this happens , which not only reduces the utilization of network bandwidth, but also reduces the performance of the system

[0004] When RTP uses UDP as the transmission protocol, because the UDP protocol is a stateless protocol, the UDP message has no reliability guarantee, sequence guarantee, and flow control fields, etc., and the reliability is poor. Because the UDP protocol has fewer control options, In the process of data transmission, it has the advantages of small delay and high data transmission efficiency. It is suitable for applications that do not require high reliability, or applications that can guarantee reliability, such as DNS, TFTP, SNMP, etc., that is to say, the UDP protocol It is only responsible for efficient data delivery, and does not provide any reliable mechanism to ensure the ...

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