Method and device for solving picture tearing in cloud game scenario based on adaptive synchronization technology

By creating virtual displays and dynamically adjusting the refresh rate in cloud gaming, combined with the G-Sync/FreeSync protocol, the screen tearing problem in cloud gaming has been solved, achieving better synchronization and game performance.

CN119729126BActive Publication Date: 2025-11-04CHINA TELECOM CLOUD TECH CO LTD
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Patent Information

Application Number
CN202411752548.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-02
Publication Date
2025-11-04
Estimated Expiration
2044-12-02

AI Technical Summary

Technical Problem

The screen tearing problem in cloud gaming has not been effectively solved. Existing technologies such as vertical synchronization lead to increased latency and decreased game performance. G-Sync/FreeSync can only be used in the local decoding stage and cannot solve the tearing problem in the cloud acquisition stage.

Method used

By creating a virtual display and adding a compatibility layer to its driver, the refresh rate is dynamically adjusted using the G-Sync/FreeSync protocol. Combined with cloud encoding and client decoding, the frame rate of the video stream is synchronized, eliminating screen tearing.

Benefits of technology

It effectively eliminates screen tearing in cloud gaming without increasing latency or performance degradation, and is compatible with better G-Sync/FreeSync technologies.

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Abstract

The application provides a solution and device for tearing of a cloud game scene picture based on adaptive synchronization technology. The solution comprises: establishing a virtual display and adding a compatible layer of a preset authentication technology to the driving of the virtual display; when cloud gaming is performed, a graphics card of a cloud host transmits a rendered picture to the virtual display, and simultaneously dynamically adjusts a refresh rate of the virtual display through a protocol of the preset authentication technology; a cloud game coding program receives original video data and frame rate information of the virtual display, encodes a video according to the frame rate information at a dynamic frame rate VFR, and sends the encoded video stream to a client; a graphics card of the client and a physical display open a function of the preset authentication technology, decode the video after receiving the video stream, and directly output the decoded video to the display. The disclosure can achieve better elimination of picture tearing by using the virtual display technology to compatibly implement the G-Sync / FreeSync adaptive synchronization technology with better effects.
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