Method for sending and receiving video data, terminal device and server

Abstract

Provided are a method for sending and receiving video data, a terminal device and a server. The method comprises the steps: enabling the server to layer original video data to form a plurality of video data streams; embedding extension information including characteristic information of the video data streams in the specified video data streams, and respectively transmitting the plurality of video data streams to corresponding channels for sending; enabling a multicast prediction model in the terminal equipment to output the multicast access strategy based on the characteristic information and the user experience information of the currently played video, and then adjusting the currently accessed multicast combination based on the multicast access strategy to obtain a better multicast combination in the current network transmission environment; and obtaining a better multicast combination in the current network transmission environment so as to receive video data streams with corresponding quantity and quality. According to the method executed by the server and the terminal equipment, network congestion can be controlled on the premise that bandwidth consumption is not increased.

Description

technical field [0001] The present invention relates to the technical field of video transmission, and more specifically, to a device for sending and receiving video data, a terminal device and a server. Background technique [0002] Multicast is a network technology that allows one or more senders (multicast sources) to send a single data packet to multiple receivers. It is an effective means to save network bandwidth and reduce network load. A multicast source (such as a server) sends a data packet to a specific multicast group, and only receivers (such as terminal devices) belonging to the address of the multicast group can receive the data packet. [0003] Existing multicast technologies include single video stream multicast, multi-video stream repeat multicast and layered video multicast. Among them, for the single video stream multicast technology, each receiver (such as a terminal device) can only obtain videos of the same quality (such as resolution), and the select...

AI Technical Summary

Problems solved by technology

Among them, for single video stream multicast technology, each receiver (such as a terminal device) can only obtain video of the same quality (such as resolution), and the selection scene of video quality is relatively simple

For multi-video stream repeated multicast technology, it can be transmitted on different channels for different quality (such as different resolution) sources of the same original video, which will cause the same video to repeatedly occupy limited network bandwidth and easily cause large Network transmission bandwidth leads to increased traffic. In addition, redundant information processing will also cause waste of computing resources.

For layered video multicast technology, receivers (such as terminal equipment) need to join and leave the multicast group periodically to adapt to changes in network status, and the burden of multicast routing and receiver rate adaptation will be too heavy, and the overall video reception The problem of unstable quality

Moreover, the existing layered video multicast technology cannot cover more application scenarios, and responds slowly to network congestion (especially short-term congestion inside the network)

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