Video coding conversion transmission control system based on network state self-evaluation

Abstract

The invention provides a video coding conversion transmission control system based on network state self-evaluation. Aiming at the problems that the network evaluation algorithm judges the network state only by depending on the packet loss rate, the judgment division is too rough, the limitation of serving as a video transmission rate adjustment basis is large and the like, the invention providesa method for combining the packet loss rate, the network delay and the delay jitter as network state evaluation factors, and the judgment of the network state is more scientific and accurate. Aiming at the problem that effective pre-control measures cannot be taken under the condition that a network has an overload trend but is not overloaded, a network overload pre-control method is added, and the network overload problem is skillfully processed at any time. Aiming at the problems that the network overload is too serious and overload control cannot be carried out by simply adjusting coding parameters, the invention provides a non-key frame active abandoning method, so that the video quality is ensured, the transmission quality is also ensured, a frame loss strategy is carried out before coding, the coding workload is reduced, and the robustness and the high efficiency are higher.

Description

technical field [0001] The invention relates to a video code conversion transmission control system, in particular to a video code conversion transmission control system based on network state self-assessment, and belongs to the technical field of video code conversion transmission. Background technique [0002] With the rapid development of Internet technology, users have higher and higher requirements for service quality of various network services, and network service quality and performance assurance have become the focus of current research and development. In the real-time video streaming media transmission system based on the Internet, it is the key to ensure the quality of service in the multimedia communication business. In the design of the real-time video network communication system, the control of network overload is a key and difficult point, which can neither cause the waste of network resources. , and ensure that the packet loss rate and delay of video data a...

AI Technical Summary

Problems solved by technology

[0015] Aiming at the deficiencies of the prior art, the video encoding conversion and transmission control system based on the self-assessment of the network status provided by the present invention is aimed at the network status assessment algorithm in the prior art relying solely on the packet loss rate to judge the network status, which is too rough in the division of the network status evaluation. As the basis for video transmission rate adjustment is limited, a method of combining packet loss rate, network delay, and delay jitter as network status evaluation elements is proposed, which provides a more reliable self-evaluation and adaptive adjustment of video data transmission rate. Judgment basis, the judgment of the network status is more scientific and accurate, which has laid a good foundation for the classification decision-making of video transcoding transmission control; the method for the prior art cannot take effective measures when the network is in a tendency to be overloaded but not yet overloaded. For the problem of pre-control measures, the network overload pre-control method is added, and the timing is clever to deal with the problem of network overload; in view of the existing technology, the network overload is too serious, and the simple adjustment of encoding parameters can no longer control the overload. The method of actively discarding key frames not only ensures the video quality, but also the transmission quality. The frame loss strategy is carried out before encoding, which reduces the workload of encoding and makes the system more robust and efficient.

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