Video frame synchronization between displays associated with separate devices

By synchronizing frame events between displays using a USB4 hub and host timing, the USB4 standard's limitations are overcome, ensuring synchronized content display and enhanced user experience.

WO2026128154A1PCT designated stage Publication Date: 2026-06-18QUALCOMM INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
QUALCOMM INC
Filing Date
2025-11-12
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

The USB4 standard supports accurate display clock frequency reconstruction but lacks frame synchronization capability between multiple data streams, leading to unsynchronized content display on separate displays, degrading the user experience, especially in low frame-rate contexts.

Method used

A first device, such as a USB4 hub, identifies a timing associated with a third device, like a USB4 host, and performs video frame synchronization between displays based on this timing, using non-USB4 or USB4 indications to synchronize frame events across displays.

Benefits of technology

Ensures frame synchronization between displays, improving the user experience by aligning content presentation times, particularly in low frame-rate scenarios, while maintaining system performance and reducing complexity.

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Abstract

Various aspects of the present disclosure generally relate to data streaming. In some aspects, a first device may identify a timing associated with a third device that is communicatively coupled to the first device, wherein the timing is a reference timing that is maintained at the first device and at a second device that is communicatively coupled to the first device. The first device may perform a video frame synchronization between a first display associated with the first device and a second display associated with the second device, based at least in part on the timing associated with the third device. Numerous other aspects are described.
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