Method for synchronously displaying multi-screen playing pictures

A technology for synchronizing display and screen, applied in color TV parts, TV system parts, TV and other directions, can solve the problems of different back-end image rendering time, hardware differences, and the inability to achieve accurate synchronization of long-term playback images. , to achieve the effect of saving hardware procurement costs, overcoming use limitations and inaccurate picture synchronization, large market value and application prospects

Active Publication Date: 2021-01-12
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to propose a method for synchronously displaying multi-screen playback images, which solves the problem of hardware differences, time-consuming introduction of communication

Method used

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  • Method for synchronously displaying multi-screen playing pictures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In this embodiment, a scene of synchronously playing and displaying multiple TVs of different models in a home appliance store is taken as an example for illustration. There are various models and sizes of TVs arranged on the booths of home appliance stores. These TVs have different configurations and parameters such as chips, screens, and picture quality.

[0087] It is set that the home appliance store is equipped with a local area network, and each TV device is connected to the local area network through wired or wireless methods;

[0088] It is set that the video resource to be played and displayed has been copied to the SD memory card of the TV, and the ID of the video resource remains the same;

[0089] Set the frame rate of the video to 25 frames per second, and the frame interval time t=40ms;

[0090] Set TV A as the master device, and other TVs as slave devices;

[0091] The method for synchronously displaying multi-screen playback pictures in this embodiment...

Embodiment 2

[0104] This embodiment takes the synchronous playback scene of the multi-screen advertising machine as an example. The multi-screen advertising machine has multiple screens, and each screen is connected to a host, and the hosts are physically connected through serial ports;

[0105] Compared with Embodiment 1, the difference of this embodiment is mainly that the communication connection modes of the master and slave devices are different, and the master and slave devices in this embodiment are connected and communicate through serial ports. In addition, the steps and process of this embodiment are completely consistent with those of Implementation 1; through the precise synchronization of multi-device playback images, the full synchronization of the playback images on multiple screens of the advertising machine is realized.

Embodiment 3

[0107] In this embodiment, a scene of multi-screen splicing and synchronous playback is taken as an example for illustration. Multiple independent display devices are spliced ​​into one large-screen device, which is used in many occasions.

[0108] In this embodiment, each independent display device has an independent player, and each device plays a different video resource independently. There is a premise that all video resources have exactly the same time axis, and Comply with strict video frame alignment.

[0109] Compared with Embodiment 1, the difference of this embodiment is that the video sources played by each device are different, and the rest of the processing steps are completely the same, so details are not repeated here.

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Abstract

The invention relates to the technical field of multimedia playing, and discloses a method for synchronously displaying multi-screen playing pictures. The problem that when multiple different devicesneed a picture to play simultaneously, due to the fact that hardware is different, time is consumed for communication between devices, and time consumed for rear-end image rendering is different, andaccurate synchronization of long-time played images cannot be achieved are solved. According to the method, synchronization is realized by adopting three stages: stage 1, rapid synchronization of playing progress of master and slave devices is realized by synchronizing playing reference time and a current image rendering clock, and pre-synchronization of playing pictures between the master and slave devices is preliminarily completed; stage 2, through frame picture accurate synchronization algorithm processing, the video frame picture synchronization problem caused by the difference between network communication time consumption and video frame rendering time consumption is solved, and accurate synchronization of pictures played by master and slave devices is achieved; and stage 3, throughcyclic timing accurate synchronization processing, the problem that system time cannot be accurately synchronized due to equipment hardware differences is solved, and accurate synchronization of pictures played for a long time is achieved.

Description

technical field [0001] The invention relates to the technical field of multimedia playing, in particular to a method for synchronously displaying multi-screen playing pictures. Background technique [0002] Collaborate with multiple devices to play independently and ensure that multiple playback screens are displayed synchronously. It has applications in multiple scenarios. In order to achieve independent playback of multiple devices and keep the screens of each device synchronized, the current mainstream screen synchronization methods include synchronization of start time, synchronization of playback progress, and synchronization of image frames. These three technologies solve the problem of multi-device playback in some aspects. The problem of screen synchronization is not thorough, and it is impossible to achieve the effect of accurate synchronous playback of multiple devices for a long time. [0003] The factors that affect the precise and synchronous playback of multip...

Claims

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Application Information

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IPC IPC(8): H04N5/04
CPCH04N5/04
Inventor 梁应龙周沙金番自蓉王翠丽
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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