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Display system and method for video synchronization of multiple spliced display screens

A video synchronization and display system technology, applied to the components of the TV system, by changing the direction of the field conversion of the input video signal, the components of the color TV, etc. Quality impact and other issues to achieve good results

Active Publication Date: 2020-05-22
JINGGANGSHAN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited computing power of the graphics card, the frame rate is often unstable when multiple videos are output at the same time. After the unstable frame rate video is output to the splicing device, there will be frame asynchronous phenomena between different splicing screens.
[0003] Existing methods for synchronizing multiple splicing devices rely entirely on the graphics card's own hardware and software processing capabilities, such as forcing vertical synchronization, limiting the number of rendering frames, and thread optimization to adjust multi-screen output. This method cannot completely solve the problem of graphics cards. Asynchronous phenomena between the various output ports of the computer, and often have other negative effects on image quality

Method used

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  • Display system and method for video synchronization of multiple spliced display screens
  • Display system and method for video synchronization of multiple spliced display screens

Examples

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Embodiment 1

[0030] refer to figure 1 , this embodiment 1 provides a display system for video synchronization of multiple spliced ​​display screens, including a graphics card, a splicing control device and a display screen, characterized in that,

[0031] The graphics card includes two signal output ports for outputting signal data containing video signal data with a specific frame rate, which are respectively the first signal output port and the second signal output port, and also includes a signal output port for adjusting the frame synchronization of the signal data A frame difference controller, the graphics card is electrically connected to the splicing control device through a data line and a control line;

[0032] The number of the splicing control devices is the same as the signal output port, including a first splicing control device and a second splicing control device, and each splicing control device also includes a reader for continuously storing the signal data transmitted at...

Embodiment 2

[0042] refer to figure 2 , this embodiment 2 provides a display method for video synchronization of multiple spliced ​​display screens, the method comprising:

[0043] Step S1, at least one signal output port in the graphics card transmits signal data including video signal data with a specific frame rate to a read-write buffer module one-to-one corresponding to the signal output port through a data line;

[0044] Step S2, after the signal data of the video signal data with a specific frame rate is transmitted to different read-write cache modules, the read-write cache module transmits the current state of each circular cache unit to the frame difference control in the graphics card through the control line device;

[0045] Step S3, the frame difference controller and each read-write cache module communicate with each other through the control line, and control the video signal data in each read-write cache module according to the current state of the circular cache unit in ...

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Abstract

The invention provides a display system and method for video synchronization of multiple spliced display screens. The system comprises a display card, at least one splicing control device and a display screen. The display card comprises a signal output port and a frame difference controller. The splicing control device comprises read-write cache module and a splicing control module, and the framedifference controller and the read-write cache modules are in mutual communication control through control lines. According to the invention, existing hardware equipment is utilized; position information state exchange between a display card and frames of different splicing control devices is carried out through a control signal line of an HDMI or DisplayPort in an idle state; closed-loop cooperative control is formed through the frame difference controller of the display card, the splicing control module of the splicing control device and a control line in a video transmission cable, and video frame synchronization of the multiple splicing screens is achieved; and the frame output adjusting capability of the display card and the adjusting capability of the splicing screen control device are fully utilized to carry out closed-loop frame synchronization control, and the effect is better than the effect of carrying out unidirectional frame synchronization only by virtue of the display card.

Description

technical field [0001] The invention belongs to the technical field of display processing, and in particular relates to a display system and method for video synchronization of multiple spliced ​​display screens. Background technique [0002] Video splicing equipment is required in applications such as TV walls and multi-screen projections. The video splicing device divides the input video signal in real time, and then synchronously outputs different images to different display devices. If multiple video splicing devices are used, these video splicing devices must also maintain frame synchronization with each other, so as to reduce the sense of tearing and dislocation between multiple pictures. For example, in some ultra-large splicing screen applications, multiple splicing screens are often used to receive different video sources output by the same graphics card. The video splicing device divides this video source and transmits it to more splicing screens. Due to the limi...

Claims

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Application Information

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IPC IPC(8): H04N21/43H04N21/41H04N5/262H04N7/01H04N21/4402
CPCH04N21/4307H04N21/4122H04N5/2624H04N7/0127H04N21/440281
Inventor 谢新辉
Owner JINGGANGSHAN ELECTRIC CO LTD
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