Distributed video synchronization display system, video synchronization display method, and storage medium

Abstract

The embodiment of the present application provides a distributed video synchronous display system, a video synchronous display method, and a storage medium, using a preset precise clock synchronization protocol to synchronize the synchronous time stamps recorded by each input node and output node, and discretize the synchronous time stamp management, The output node calculates the target difference between the first synchronization time stamp and the second synchronization time stamp, and when the target difference is equal to the preset difference threshold, displays the received target video frame on the screen, thereby increasing the The synchronization of the output images of each output node in the distributed system. Configure the system frequency through the adjustable crystal oscillator, keep the output node system clock frequency synchronous, and prevent the occurrence of offset. Using the PID control algorithm, the phase deviation can be quickly and effectively converged to adjust the phase of the VS signal, thereby further improving the output image of each output node. synchronicity.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a distributed video synchronous display system, a video synchronous display method, and a storage medium. Background technique [0002] In a centralized video synchronous display system, in order to ensure that the respective videos of each output node can be output to the splicing screen for synchronous display, a unified clock source is generally used to ensure that the clocks of each output node are consistent and have the same frequency and phase. Each output node can output and display synchronously at a specified time according to a unified clock source. In a distributed system, it is impossible to provide a similar centralized homologous clock. Each output node has an independent clock source. Although each output node can use the same reference clock through the network, due to network stability factors and Delay and other situations, there will be cer...

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Problems solved by technology

In a distributed system, it is impossible to provide a similar centralized homologous clock. Each output node has an independent clock source. Although each output node can use the same reference clock through the network, due to network stability factors and Delay and other situations, there will be certain errors in network calibration, which will cause the clock error of each output node to reach the millisecond level or more, and it is impossible to ensure that each output node outputs the same frame of image at the same time

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