CN101986258B - Method and device for synchronously displaying desktop signals based on PCIE bus - Google Patents
Method and device for synchronously displaying desktop signals based on PCIE bus Download PDFInfo
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- CN101986258B CN101986258B CN201010548937A CN201010548937A CN101986258B CN 101986258 B CN101986258 B CN 101986258B CN 201010548937 A CN201010548937 A CN 201010548937A CN 201010548937 A CN201010548937 A CN 201010548937A CN 101986258 B CN101986258 B CN 101986258B
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Abstract
The invention provides a method and device for synchronously displaying desktop signals based on a PCIE bus, overcoming the visual rip impact caused by the transmission strategy of PCIE time-sharing multiplexing. The method specifically comprises the following steps: applying for memory space; starting the data transmission thread; calling drawing functions for drawing; making a refreshing mark on the corresponding display unit; sending start marks respectively via the PCIE bus; sending image data respectively via the PCIE bus; sending end marks respectively via the PCIE bus; and changing over the image data. The invention treats transmission of the image data and synchronization of the signals separately and carries out synchronization only when the specific marks are received, and can instantly complete synchronous display of the PC desktop signals with high resolution on the display system based on the PCIE bus, avoids the visual effect of rip and has good synchronism as the data volume of the marks is low and the time for transmitting the marks can be ignored.
Description
Technical field
The present invention relates to the synchronous display technique field of signal, particularly a kind of synchronous display method and device of large-scale high resolving power PC desktop signal.
Background technology
PCIE (Peripheral Component Interconnect Express, the interconnected high-speed interface of external unit) after Intel company's proposition, has represented the interface standard of I/O of future generation as a up-to-date bus and interface standard.Its main advantage is exactly the message transmission rate height, and the highest 16X 2.0 versions can reach the speed of 10GB/s at present, and also have sizable development potentiality.Current PC IE has replaced AGP (Accelerated Graphic Ports basically comprehensively; The graphics system interface), just as PCI replacement ISA (Industrial Standard Architecture, industrial standard architecture bus) was the same originally; This process has excessively finished; Though also have some old users at the video card with the AGP interface, the AGP video card stops to sell on the market comprehensively, the mainboard that comprises the AGP slot trace that also disappears.
At present, the PCIE bussing technique has been widely applied to PC desktop signal display system, and the PC desktop signal of general resolution (being lower than 2048x2048 resolution) shows on single display unit and realizes through the PCIE bus transfer.But at high resolving power PC desktop signal display system; Because single display unit size size and wire rod bandwidth constraints; Single screen can not display of high resolution PC desktop signal; So must become high resolving power PC desktop signal segmentation the picture signal of a plurality of general resolution, arrive each display unit interface card through the PCIE bus transfer again.Again because the PCIE bus takes is the transmission policy of time-sharing multiplex; The a certain moment can only transmit data on a certain equipment, when lot of data need be transmitted, because data capacity is big; Transmission can take certain hour; The display unit of receiving data earlier will show earlier, and the display unit of back is but still in the process of carrying out data transmission, and the PC desktop signal that will cause being transferred to each display unit interface card like this is asynchronous.Especially in that the large-scale display wall system of a plurality of display units is arranged,, cause to show synchronously between front end display unit and the display unit that the serious vision of tearing is just arranged, have influence on the net synchronization capability of system because the transmission of PC desktop signal is asynchronous.
Such as; The PC desktop is the signal of a high resolving power 8192x3072; Can not realize so high-resolution display unit according to present technology; Because general display unit is a 1024x768 resolution, so we must become high-resolution desktop signal segmentation the image of polylith 1024x768 resolution, timesharing utilizes the PCIE bus to send view data to each display unit interface card then.But the problem of doing like this is to guarantee that the signal Synchronization output between each display unit interface card shows, has caused the visual effect of tearing.
Summary of the invention
For addressing the above problem; The present invention provides a kind of high resolving power PC desktop signal Synchronization display packing and device based on the PCIE bus; Can be the image data transmission of high resolving power PC desktop signal and the synchronous separate processes of signal; Reduce the caused visual impact of time-sharing multiplex mechanism, thereby realize the synchronous demonstration of high resolving power PC desktop signal picture break-up owing to the PCIE bus.
A kind of high resolving power PC desktop signal Synchronization display packing based on the PCIE bus of the present invention specifically may further comprise the steps:
Step S1 applies for a memory headroom, and puts high-definition picture into this memory headroom;
Step S2, log-on data transmission thread;
Step S3 calls drawing function, in memory headroom, draws according to predetermined figure;
Step S4, among the calculation procedure S3 institute's drawing shape the coordinate of each display unit of process, and these display units are made to refresh mark respectively according to this coordinate;
Step S5, the data transmission thread sends the synchronizing signal beginning label respectively through the PCIE bus and gives corresponding display unit interface card according to refreshing mark;
Step S6, data transmission thread send the view data of institute's drawing shape respectively and give corresponding display unit interface card according to the synchronizing signal beginning label through the PCIE bus, accomplish until all images data are sent;
Step S7, the data transmission thread sends the synchronizing signal end mark respectively through the PCIE bus and gives corresponding display unit interface card;
Step S8, each display unit interface card switches to the view data of sending among the step S6 to the view data of output according to the synchronizing signal end mark.
The present invention also provides a kind of high resolving power PC desktop signal Synchronization display device based on the PCIE bus in addition, comprises memory module, data transmission module, graphics module and identification module; Said memory module is connected with graphics module, identification module, data transmission module respectively;
The function of memory module is the storage high-definition picture;
The function of graphics module is on high-definition picture, to draw according to predetermined figure;
The function of identification module be calculate the figure done each display unit of process, and respectively each display unit is made to refresh mark;
The function of data transmission module is according to refreshing mark, sending the synchronizing signal beginning label respectively through the PCIE bus and give corresponding display unit interface card; And, send the view data of institute's drawing shape through the PCIE bus respectively and give corresponding display unit interface card according to the synchronizing signal beginning label; And after detecting the image data transmission completion; Send the synchronizing signal end mark respectively through the PCIE bus and give corresponding display unit interface card, switch to the view data that said data transmission module sends to the view data of output by each display unit interface card according to the signal Synchronization end mark then.
A kind of high resolving power PC desktop signal Synchronization display packing and device of the present invention based on the PCIE bus; Because with the processing of coming of the synchronous branch of image data transmission and signal; Before all not receiving all view data, do not carry out the synchronous operation of signal; Just carry out synchronous operation up to receiving specific markers; And after receiving mark, can accomplish the synchronous demonstration of signal moment, a plurality of display unit interface cards almost near switching to new displaying contents synchronously, have been avoided the visual effect of tearing.
Description of drawings
Fig. 1 is the desktop signal Synchronization display packing process flow diagram that the present invention is based on the PCIE bus;
Fig. 2 is the desktop signal Synchronization display device structure synoptic diagram based on the PCIE bus;
Fig. 3 is a 4x4 high resolving power PC desktop signal display system synoptic diagram;
Fig. 4 is a 4x5 high resolving power PC desktop signal display system synoptic diagram.
Embodiment
The present invention provides a kind of high resolving power PC desktop signal Synchronization display packing and device based on the PCIE bus; Time-sharing multiplex transmission policy owing to PCIE in the time of can solving available technology adopting PCIE bus transfer data causes the PC desktop signal of each display unit interface card asynchronous, the problem that causes vision to tear.Describe technical scheme of the present invention in detail below in conjunction with concrete embodiment.
Embodiment one
Suppose on a large-scale 4x4 high resolving power PC desktop signal display system, to realize that signal Synchronization shows; As shown in Figure 3, this display system has 16 display units, and the resolution of each display unit is 1024x768; Name each display unit respectively with 1 to 16; Here describe signal Synchronization display packing of the present invention in detail through on display system, drawing straight line, as shown in Figure 1, the inventive method detailed process is following:
Step S1 applies for a memory headroom, and puts high-definition picture into this memory headroom.As an embodiment preferably; Be different from the prior art through applying for that a virtual memory space is to deposit the practice of image; The present invention applies for that by display driver a memory headroom is in order to deposit high-definition picture in physical memory; With convenient follow-up various operations, have workable, characteristics such as be easy to read;
Step S2, log-on data transmission thread.This thread is responsible for data transmission, comprise the transmission beginning label,, a large amount of view data or end mark wait until in the corresponding display unit interface card;
Step S3, operating system is called drawing function, in memory headroom, draws according to predetermined figure, should predetermined figure be straight line in the present embodiment;
Step S4, calculated line the coordinate of each display unit of process, calculated display unit 2,3,7, No. 8, promptly these 4 display units need refresh, and then these 4 display units are made to refresh mark respectively;
Step S5 after the data transmission thread detects and refreshes mark, sends the interface card that the synchronizing signal beginning label is given 2,3,7, No. 8 display units respectively through the PCIE bus.This step is not temporarily sent lot of data, just sends some marks, because data volume is little, the transmission time can ignore, and its effect just tells the display unit interface card to do in next procedure, will have the preparation of a large amount of image data transmission;
Step S6 after the data transmission thread detects the synchronizing signal beginning label, sends the straight line of being done in the step 3 respectively through the PCIE bus with the mode of view data to the interface card of 2,3,7, No. 8 display units, accomplish until all images data are sent.This step is owing to need the data volume of transmission big, although adopt the speed of PCIE bus transfer very fast, the transmission time that possibly need is still longer;
Step S7, data transmission thread send the interface card that the synchronizing signal end mark is given 2,3,7, No. 8 display units respectively through the PCIE bus after detecting all data transmission completion;
Step S8, each display unit interface card switches to the view data of sending among the step S6 to the view data of output according to the synchronizing signal end mark.S5 is similar with step; Because step 7 is simple some marks rather than lot of data; So the display unit interface card is at the process time weak point very that receives these marks; Arrived negligible stage, thus in this step each display unit interface card almost near switching straight line picture to display simultaneously.
Do not stop transport for fear of the data transmission thread always then take too many cpu resource; As an embodiment preferably; Can also after step 4, increase a step 401: the dormancy time T that preestablishes a data transmission thread; Can set T in the present embodiment is 30ms, promptly when surpassing 30ms, then gets into step S5; Otherwise return to step S3.
The present invention can also comprise step S9: judging whether also needs on PC desktop signal display system, to show other image, if then return step S3; Otherwise accomplish the synchronous procedure for displaying of signal.
The present invention is based on the high resolving power PC desktop signal Synchronization display packing of PCIE bus; With the processing of coming of the synchronous branch of image data transmission and signal, to marginal just the beginning and end mark of signal Synchronization, promptly up to receiving that the specific markers that the expression transmission is accomplished just carries out synchronous operation; Because this flag data amount is little; Time of reception can be ignored, therefore can be on display system moment accomplish the synchronous demonstration of high resolving power PC desktop signal, a plurality of display interface cards are almost near switching to new displaying contents synchronously; Avoided the visual effect of tearing, synchronism is good; And the synchronizing signal transmitted of the present invention, do not pass through any compression and convergent-divergent, adopt original resolution to transmit, the quality that image shows is high.
Embodiment two
In order more clearly to set forth the high resolving power PC desktop signal Synchronization display packing based on the PCIE bus, the present invention also provides an other specific embodiment.Be illustrated in figure 4 as 4x5 high resolving power PC desktop signal display system synoptic diagram; This display system has 20 display units; The resolution of each display unit is 1400x1050; Name each display unit respectively with 1 to 20, here through on display system, drawing the detailed process that piece image is described signal Synchronization display packing of the present invention in detail.
Step S1 and step S2 are the preparatory stage of whole inventive method, and identical with among the embodiment one repeats no more here;
Step S3, operating system is called drawing function, in memory headroom, draws according to predetermined figure, and the predetermined figure described in the present embodiment is a rectangular image;
Step S4, calculate rectangle the coordinate of each display unit of process, calculated display unit 4,5,9,10,14, No. 15, then these 6 display units are made to refresh mark respectively;
Step S5 after the data transmission thread detects and refreshes mark, sends the interface card that the synchronizing signal beginning label is given 4,5,9,10,14, No. 15 display units respectively through the PCIE bus;
Step S6; After the data transmission thread detects the synchronizing signal beginning label; The rectangular image of being done in the step 3 is sent to the interface card of 4,5,9,10,14, No. 15 display units respectively through the PCIE bus with the mode of view data, accomplish until all images data are sent;
Step S7, data transmission thread send the interface card that the synchronizing signal end mark is given 4,5,9,10,14, No. 15 display units respectively through the PCIE bus after detecting all data transmission completion;
Step S8, each display unit interface card switches to the view data of sending among the step S6 to the view data of output according to the synchronizing signal end mark, and then the signal Synchronization process finishes.
Embodiment three
The present invention also provides a kind of high resolving power PC desktop signal Synchronization display device based on the PCIE bus; Comprise a plurality of display unit interface cards, memory module, data transmission module, graphics module and identification module; Memory module is connected with graphics module, identification module, data transmission module respectively; Data transmission module is connected with each display unit interface card, and is as shown in Figure 2;
The function of memory module is the high-definition picture that storage need show;
The function of graphics module is to draw according to predetermined figure on the high-definition picture in memory module, and this predetermined picture can be a straight line, and rectangular image or the like, the figure of being painted remain and be kept in the memory module;
Identification module is still operated in memory module, its function be calculate the figure done the coordinate of each display unit of process, and respectively each display unit is made to refresh mark according to this coordinate;
Data transmission module serves as the bridge between memory module and each the display unit interface card; Its function is the related data of transmitting between the two; Concrete principle of work is following: according to the above-mentioned mark that refreshes, send the synchronizing signal beginning label respectively through the PCIE bus and give corresponding display unit interface card; And, send the view data of institute's drawing shape in the memory module through the PCIE bus respectively and give corresponding display unit interface card according to the synchronizing signal beginning label; And after detecting all images data transmission completion, send the synchronizing signal end mark respectively through the PCIE bus and give corresponding display unit interface card;
The display unit interface card has a plurality of; Concrete number is decided (display unit interface card 1, display unit interface card 2 according to different situations ... Display unit interface card N), its function is to switch to the view data that said data transmission module sends to the view data of output according to the signal Synchronization end mark.
High resolving power PC desktop signal Synchronization display device based on the PCIE bus of the present invention has the technique effect same with method of the present invention, repeats no more here.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (5)
1. the desktop signal Synchronization display packing based on the PCIE bus is characterized in that, may further comprise the steps:
Step S1 applies for a memory headroom, and puts high-definition picture into this memory headroom;
Step S2, log-on data transmission thread;
Step S3 calls drawing function, in said memory headroom, draws according to predetermined figure;
Step S4, the coordinate of each display unit of institute's drawing shape process among the calculation procedure S3, and said each display unit is made to refresh mark respectively according to this coordinate;
Step S5, said data transmission thread send the synchronizing signal beginning label respectively through the PCIE bus and give corresponding display unit interface card according to the said mark that refreshes;
Step S6, said data transmission thread send the view data of institute's drawing shape respectively and give corresponding display unit interface card according to said synchronizing signal beginning label through said PCIE bus;
Step S7, said data transmission thread send the synchronizing signal end mark respectively through said PCIE bus and give corresponding display unit interface card after detecting said image data transmission completion;
Step S8, said each display unit interface card switches to the view data of sending among the step S6 to the view data of output according to said synchronizing signal end mark.
2. the desktop signal Synchronization display packing based on the PCIE bus according to claim 1 is characterized in that memory headroom described in the step S1 is a physical memory.
3. the desktop signal Synchronization display packing based on the PCIE bus according to claim 1; It is characterized in that; Also comprise step S401 after the step S4: preestablish the dormancy time of a data transmission thread,, then get into step S5 if said dormancy time is overtime; Otherwise return to step S3.
4. the desktop signal Synchronization display packing based on the PCIE bus according to claim 1 is characterized in that, also comprises step S9: judging whether also needs on PC desktop signal display system, to show other image, if then return step S3; Otherwise accomplish the synchronous procedure for displaying of signal.
5. the desktop signal Synchronization display device based on the PCIE bus is characterized in that, comprises memory module, data transmission module, graphics module and identification module; Said memory module is connected with said graphics module, identification module, data transmission module respectively;
Said memory module is used to store high-definition picture;
Said graphics module is used on said high-definition picture, drawing according to predetermined figure;
Said identification module be used to calculate institute's drawing shape the coordinate of each display unit of process, and respectively said each display unit is made to refresh mark according to this coordinate;
Said data transmission module is used for according to the said mark that refreshes, and sends the synchronizing signal beginning label respectively through the PCIE bus and gives corresponding display unit interface card; And, send the view data of institute's drawing shape through said PCIE bus respectively and give corresponding display unit interface card according to said synchronizing signal beginning label; And after detecting said image data transmission completion; Send the synchronizing signal end mark respectively through said PCIE bus and give corresponding display unit interface card, switch to the view data that said data transmission module sends to the view data of output by each display unit interface card according to said signal Synchronization end mark then.
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| CN201010548937A CN101986258B (en) | 2010-11-18 | 2010-11-18 | Method and device for synchronously displaying desktop signals based on PCIE bus |
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| CN102497527B (en) | 2011-12-16 | 2013-11-27 | 杭州海康威视数字技术股份有限公司 | Multi-processor video processing system and video image synchronous transmission and display method thereof |
| CN103888524B (en) * | 2014-03-11 | 2018-01-23 | 广东威创视讯科技股份有限公司 | Graphic tabletop synchronous method and system |
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| US7119811B2 (en) * | 2001-08-10 | 2006-10-10 | Pixia Corp. | Image display system |
| US7522167B1 (en) * | 2004-12-16 | 2009-04-21 | Nvidia Corporation | Coherence of displayed images for split-frame rendering in multi-processor graphics system |
| CN101256762B (en) * | 2008-03-21 | 2010-08-11 | 广东威创视讯科技股份有限公司 | Multiple-screen splitting and jointing method and device |
| CN101615108B (en) * | 2009-07-24 | 2012-05-09 | 广东威创视讯科技股份有限公司 | Device and method for splicing multiple screens |
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