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Local area network multi-screen display synchronization method and device

A multi-screen display and local area network technology, which is applied in multiplexing communication, time division multiplexing system, selective content distribution, etc., can solve the problems of inaccurate synchronization and high delay of display terminals in the local area network, and achieve the improvement effect , low cost, and high flexibility in settings

Active Publication Date: 2021-12-24
众立智能科技(深圳)有限公司
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Problems solved by technology

[0003] The data goes through the network to the hardware and then to the display. The time for each device to get the data is different. We need to synchronize the screens of all devices, and the delay is unavoidable. We can only synchronize the delays generated by each link as much as possible. Therefore, in the local area network, the display terminal synchronization is not accurate, and the delay is too high is a problem that needs to be solved

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  • Local area network multi-screen display synchronization method and device
  • Local area network multi-screen display synchronization method and device
  • Local area network multi-screen display synchronization method and device

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0062] to combine Figure 1-Figure 3 The present invention is described in detail

[0063] The invention provides a local area network multi-screen display synchronization method. Each output is firstly configured with an output device IP and location and recorded well. When receiving a network instruction to add a signal source, select the first device sorted in advance as the For the server that calibrates the time, if the first one is not online, then the second one. When only one device is online, then this device is the server, and its time is the synchronized time, and so on.

[0064] After the time server is selected, the time server will send time synchronization packets to other devices in the LAN at regular intervals. The network delay here is used for time synchronization and will not affect data transmission. After other devices re...

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Abstract

The invention provides a local area network multi-screen display synchronization method and device, including a video signal input source, a distributed input node, a switch, a distributed output node and a display terminal; by connecting multiple devices in the local area network to the same video source, and setting the One device is a time server, which sends the local system clock of the time server to all devices under the same LAN through the time server, and each device in the LAN determines the display time of the decoded video frame according to the local system clock of the time server, and according to The display timestamp of the video frame specifically shows that the number of connected devices can be expanded to the number of devices that the LAN can support. At the same time, each device in the LAN is synchronized according to the local system clock of the time server, and the synchronization of other devices has nothing to do with the local clock. The consistency of the synchronization clock source is guaranteed, the accuracy of video synchronization between multiple devices is improved, and the effect of multi-device synchronous playback is improved.

Description

technical field [0001] The invention relates to the technical field of video playback, in particular to a local area network multi-screen display synchronization method and device. Background technique [0002] In the existing embedded operating system, factors such as inconsistent interrupt response delay time and crystal oscillator frequency drift make it difficult to accurately synchronize time. The synchronous display of video must ensure that different devices output the same frame of picture at the same time, which requires high accuracy of output time, and the pictures will be staggered if the time difference between devices is slightly larger. [0003] The data goes through the network to the hardware and then to the display. The time for each device to get the data is different. We need to synchronize the screens of all devices, and the delay is unavoidable. We can only synchronize the delays generated by each link as much as possible. Therefore, in the local area ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/43H04N21/8547H04J3/06
CPCH04N21/43076H04N21/4305H04N21/8547H04J3/0638H04J3/0661
Inventor 彭雪昭陶帅李国明
Owner 众立智能科技(深圳)有限公司
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