Video transmission method, device and system

Abstract

The embodiment of the invention provides a video transmission method, device and system, which can reduce the generation of redundant data in VR video transmission, reduce the transmission burst bandwidth and reduce the swivel high-definition display delay MTHR. The method comprises the steps that a terminal sends first view angle information to a server through a first link according to a first period, and correspondingly, the server receives the first view angle information from the terminal through the first link according to the first period; and after determining that the first view angle information is the latest view angle information according to a second period, the server obtains data of a first frame image corresponding to the first view angle information, and sends the data of the first frame image to the terminal through a second link; and correspondingly, the terminal receives the data of the first frame image from the server through the second link according to a second period.

Description

technical field [0001] The present application relates to the field of virtual reality technology, and in particular to a video transmission method, device and system. Background technique [0002] During the transmission of virtual reality (virtual reality, VR) video, a VR panoramic video can be split into a field of view (FoV) stream and a panoramic stream for transmission. The FoV stream is the user's current viewing angle. the video data within. Exemplarily, one 8K VR panoramic video can be split into one 4K FoV stream and one 4K panoramic stream. [0003] Usually, the transmission process of the FoV stream of VR video is as follows: figure 1 shown. The specific process includes: [0004] Step 1. The terminal requests the video data of FoV1 from the server. In response to this request, the server starts transmitting the video data of FoV1. After the terminal receives the video data of FoV1, it decodes and displays it. [0005] Wherein, the FoV data requested by th...

AI Technical Summary

Problems solved by technology

[0011] In this method, due to a certain time delay in network transmission, when the FoV of the user changes, the server cannot receive the command to stop sending the video data of FoV1 issued by the terminal in time, and the server may continue to transmit the video data of FoV1 within this time delay. Video data, resulting in a large amount of redundant data

After the server receives the signaling from the terminal requesting FoV2 video data, in order to make up for the time lost due to the transmission of FoV1 redundant data and signaling transmission delay, the server will increase the transmission bandwidth, thereby increasing the transmission burst bandwidth, Causing playback freeze or displaying low-definition video, affecting user experience

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