CN102622196B - Network transmission based picture synchronization technology for multi-screen display system - Google Patents
Network transmission based picture synchronization technology for multi-screen display system Download PDFInfo
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- CN102622196B CN102622196B CN201210029784.1A CN201210029784A CN102622196B CN 102622196 B CN102622196 B CN 102622196B CN 201210029784 A CN201210029784 A CN 201210029784A CN 102622196 B CN102622196 B CN 102622196B
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Abstract
The invention relates to a network transmission based picture synchronization technology for a multi-screen display system. The multi-screen display system comprises a plurality of display units by means of splicing, a picture synchronization process is completed in a signal processing system, the signal processing system comprises distributive input nodes and output nodes, each display unit comprises only one output node corresponding to the same, the input nodes are responsible for acquiring and preprocessing picture information and transmitting the corresponding output nodes, and all the output nodes send out the corresponding picture information to the respective display units every time under the control of synchronization signals so that picture synchronization is achieved.
Description
Technical field
The present invention relates to video information process field, the picture synchronization technology for multi-screen display system of especially a kind of transmission Network Based.
Background technology
Current, multi-screen display system has been widely used in the fields such as security protection, monitoring, command scheduling, video display, Information issued.Because multi-screen display system is spliced by numerous monomer display units, when so using, show the dynamic menu of view picture as a logical screen at it, between each display unit, the stationary problem of image information just becomes the technical barrier that multi-screen display system must solve.
Common information handling system adopts centralized structure, and all signals collecting, process and output device concentrate on one piece of mainboard entirely, have unified clock frequency; Under the clock frequency that this is unified, the synchronous object of image information can be reached very simply.
But for using the signal processing system of distributed frame, all nodes are all operated under respective clock frequency, there is not unified clock, so common technological means cannot ensure the synchronism outputed signal.
Under this kind of background, we have proposed a kind of picture synchronization technology for multi-screen display system of transmission Network Based.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of image information simultaneous techniques of transmission Network Based, can reach the target of image information simultaneous display in multi-screen display system.
A picture synchronization technology for multi-screen display system for transmission Network Based, whole image information disposal system is made up of each input node distributed and output node, comprises following steps:
Step (a), input node is carried out pre-service to image information and is sent to corresponding output node;
Step (b), output node receives image information, and by the specification of every frame stored in buffer memory;
, there is a host node in output node, sent the synchronizing signal of frequency 30 hertz by it in step (c), receives for all output nodes comprising host node;
Step (d), each display unit has a unique output node corresponding with it to be connected, and all output nodes under control of the synchronization signal, send image information to respective display unit simultaneously.
Further, above-mentioned technology also can have following characteristics: input node has encoding function, and output node has decoding function.
Further, above-mentioned technology also can have following characteristics: all types signal, all by six class network cable transmissions, carries out data total exchange by full gigabit networking switch.
Further, above-mentioned technology also can have following characteristics: there is not any type of central control equipment in whole system, but completes picture synchronization function by each node cooperative work.
Further, above-mentioned technology also can have following characteristics, in described step (b): there are two buffer zones in the middle of output node, alternating receipts and output image information.
Further, above-mentioned technology also can have following characteristics, in described step (c): host node can be served as by any output node, once the output node of serving as host node damages, system can assign new output node to serve as host node automatically.
Further, above-mentioned technology also can have following characteristics, in described step (c): synchronizing signal, by the multicast functionality of switch, makes all output nodes receive synchronizing signal simultaneously.
Further, above-mentioned technology also can have following characteristics, and in described step (d): when receiving synchronizing signal, output node exports the image information stored in the previous frame in the middle of buffer area.
Accompanying drawing explanation
Fig. 1 is image information flow graph of the present invention;
Fig. 2 is synchronizing signal flow graph of the present invention;
Fig. 3 is the present invention's output node Intra pictures information write and output services schematic diagram;
Fig. 4 is the present invention's output node Intra pictures information write and output services sequential chart.
In accompanying drawing, the list of parts representated by each label is as follows:
11: each frame image information, 12: output node, 13: the multi-screen display system be made up of 4 display units;
21: host node, 22: vice-node;
31: output node, 32: numbers buffer memorys, 33: No. two buffer memorys, 34: image information output interface, 35: display unit.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Fig. 1 is image information flow graph of the present invention, as shown in the figure, image information be transfused to node processing good after pass to output node by network by the specification of every " frame ", more on a frame-by-frame basis outputted on screen by output node and show.
Fig. 2 is synchronizing signal flow graph of the present invention, and as shown in the figure, the synchronizing signal of the frequency sent by host node 30 hertz, by multicast while of switch to all output nodes comprising host node.
Fig. 3 is the present invention's output node Intra pictures information write and output services schematic diagram, and as shown in the figure, image information is alternately written two buffer zones; When synchronizing signal arrives, output node exports the image information of previous frame write.
Fig. 4 is the present invention's output node Intra pictures information write and output services sequential chart, and as shown in the figure, image information write frequency and synchronous signal frequency are all 30 hertz; Workflow is:
1. first information write cycle, image information A
1a buffer zone is written within this cycle;
2. second information write cycle, image information B
1within this week, be written into No. two buffer zones, first synchronous signal impulse that host node sends arrives within this information write cycle, and output node exports the image information A writing a buffer memory in a upper information write cycle
1;
3. the 3rd information write cycle, image information C
1within this cycle, be written into a buffer zone, second synchronous signal impulse that host node sends arrives within this information write cycle, and output node exports the image information B writing No. two buffer memorys in a upper information write cycle
1;
Work goes on according to this, on multi-screen display system, finally obtain a continuous and synchronous dynamic menu.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a picture synchronization technology for multi-screen display system for transmission Network Based, is characterized in that, whole image information disposal system is made up of each input node distributed and output node, comprises following steps:
Step (a), input node is carried out pre-service to image information and is sent to corresponding output node;
Step (b), output node receives image information, and by the specification of every frame stored in buffer memory;
, there is a host node in output node, sent the synchronizing signal of frequency 30 hertz by it in step (c), receives for all output nodes comprising host node;
Step (d), each display unit has a unique output node corresponding with it to be connected, and all output nodes under control of the synchronization signal, export image information to respective display unit simultaneously;
Input node has encoding function, and output node has decoding function;
All types signal, all by six class network cable transmissions, carries out data total exchange by full gigabit networking switch;
There is not any type of central control equipment in whole system, but complete picture synchronization function by the collaborative work of each node; There are two buffer zones, alternating receipts and output image information in the middle of output node; Host node can be served as by any output node, once the output node of serving as host node damages, system can assign new output node to serve as host node automatically; Synchronizing signal, by the multicast functionality of switch, makes all output nodes receive synchronizing signal simultaneously;
When receiving synchronizing signal, output node exports the image information stored in the previous frame in the middle of buffer area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210029784.1A CN102622196B (en) | 2012-02-10 | 2012-02-10 | Network transmission based picture synchronization technology for multi-screen display system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210029784.1A CN102622196B (en) | 2012-02-10 | 2012-02-10 | Network transmission based picture synchronization technology for multi-screen display system |
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| Publication Number | Publication Date |
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| CN102622196A CN102622196A (en) | 2012-08-01 |
| CN102622196B true CN102622196B (en) | 2015-02-18 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103345375A (en) * | 2013-07-29 | 2013-10-09 | 广东威创视讯科技股份有限公司 | Control system and method for dynamic splicing wall display |
| CN104216671B (en) * | 2014-08-19 | 2017-03-22 | 宁波Gqy视讯股份有限公司 | Method for realizing synchronous cooperated display on multiple sets of spliced display screens |
| CN104811658B (en) * | 2014-12-26 | 2017-12-26 | 山东巨洋神州信息技术有限公司 | Image intelligent synchronization method based on optical fiber distributed type display system |
| CN106569760B (en) * | 2016-04-23 | 2020-10-16 | 上海大学 | Large multi-screen GIS display system based on synchronous control and display method thereof |
| CN105898625B (en) | 2016-04-29 | 2020-03-17 | 腾讯科技（深圳）有限公司 | Playing processing method and terminal equipment |
| CN107632804B (en) * | 2016-07-19 | 2021-06-08 | 宁波Gqy视讯股份有限公司 | Tiled display system |
| CN106303451B (en) * | 2016-08-30 | 2019-03-01 | 广东威创视讯科技股份有限公司 | The video processing unit output synchronism detection method and system of multi-display apparatus |
| CN108259783B (en) * | 2016-12-29 | 2020-07-24 | 杭州海康威视数字技术股份有限公司 | Digital matrix synchronous output control method and device and electronic equipment |
| CN111263230B (en) * | 2020-02-19 | 2022-04-26 | 北京仁光科技有限公司 | Distributed splicing display picture synchronization method and system |
| CN111586453B (en) * | 2020-05-21 | 2022-04-01 | 上海大因多媒体技术有限公司 | Screen splicing synchronization method and system |
| CN114938463A (en) * | 2022-06-22 | 2022-08-23 | 深圳市泛联信息科技有限公司 | Video display system and method |
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| ES2387100T3 (en) * | 2005-07-28 | 2012-09-13 | Ima Industria Macchine Automatiche S.P.A. | Information exchange method between digital units in a distributed system |
| CN101674364B (en) * | 2009-09-28 | 2011-11-09 | 华为终端有限公司 | Wireless screen splicing display method, mobile communication terminal and device |
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