Local area network multi-terminal synchronous playing time deviation calculation improving method

Abstract

The invention discloses a local area network multi-terminal synchronous playing time deviation calculation improving method. The method comprises the steps that 1, a slave device sends a timestamp information packet to a primary device, and the playing schedule T1 of the slave device at the moment is recorded; 2, the primary device receives the timestamp information packet from the salve unit, and the playing schedule T2 of the primary device at the moment is added into the timestamp information packet; 3, the main device sends the timestamp information packet to the slave device, and the playing schedule T3 at the moment when the timestamp information packet leaves from the primary device is added into the timestamp information packet; 4, the slave device receives the timestamp information packet from the primary device, and the playing schedule T4 of the slave device at the moment is recorded; 5, threshold filtering is carried out on network delay between the primary device and the slave device; 6, the least square method is adopted for figuring out the playing time deviation between the primary device and the slave device. The local area network multi-terminal synchronous playing time deviation calculation improving method has the advantage of being capable of accurately figuring out the playing time deviation between the primary device and the slave device.

Description

technical field [0001] The present invention relates to a method for multi-terminal synchronous calculation of play time deviation, and more specifically, to an improved method for multi-terminal synchronous play time deviation calculation in a local area network. Background technique [0002] With the development of information and network technology, the acceleration of 3C (computer, communication, home appliance) triple play, the era of home digitalization has come, and various forms of home digital electronic products such as smart TVs, computers, smart phones, PADs, etc. bring people life into the network. People are eagerly looking for the interconnection and integration of various electronic devices in the family, so as to realize easy and convenient digital multimedia sharing and services. A multi-room music playback system based on DLNA protocol provides us with a more comfortable and convenient audio sharing method. The prerequisite for realizing multi-terminal a...

AI Technical Summary

Problems solved by technology

This method is feasible in an ideal network environment, but when the network environment is more complex, there may be a large network delay in the network, and even information packet loss may occur, which will affect the accuracy of multi-terminal synchronization. Here comes the big challenge

That is, there are still large errors in actual implementation, which directly affect the accuracy and effect of synchronization

[0003] Accurately calculating the playback deviation between the master and slave devices is a prerequisite for synchronization. Without this prerequisite, synchronization is out of the question.

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