Client device and local clock skew correction method therefor

Abstract

A local clock skew correction device of the present invention is a client device which is synchronized with a counterpart client device so as to provide a time-aware service, and comprises: a local time providing unit for providing first local clock data and second local clock data according to a local clock; a media scheduling unit for receiving first media data and second media data from the counterpart client device, scheduling a first playback time point of the first media data by using the first local clock data, and scheduling a second playback time point of the second media data by using the second local clock data; and a skew monitoring unit for requesting a global time server for global time data when the difference between the first playback time point and the second playback time point exceeds a skew threshold, wherein the first media data and the second media data are different types of media data.

Description

technical field [0001] The present invention relates to a client device and a local clock offset correction method thereof. Background technique [0002] In order to feel the sense of reality through various media sharing (Share) and content (Contents) communication between remote users such as remote video conferences and virtual reality, the time (clock) between remote users must be synchronized (Synchronization). Common time synchronization methods usually utilize a reference clock (Reference clock). [0003] Typical time synchronization methods include Network Time Protocol (Network Time Protocol, NTP) and Precision Time Protocol (Precision Time Protocol, PTP), etc., usually correcting the clock skew (clock skew) at a certain period. For example, in the Windows environment, the synchronization of the system time utilizes the network time protocol to execute the synchronization of the local clock (local clock) in a period of 7 days. [0004] In the method of synchronizi...

AI Technical Summary

Problems solved by technology

That is to say, reducing the error between reference time and user time through time synchronization can ensure the accuracy of time, but it will reduce the efficiency of system resource utilization

For example, a user who only likes to surf the web can ignore errors of a few hundred milli-seconds, but for a highly time-dependent service such as stock trading, a difference of a few hundred milliseconds can cause damage beyond monetary loss

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