CN102637120A - System and method for controlling synchronous display of spliced screens - Google Patents
System and method for controlling synchronous display of spliced screens Download PDFInfo
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Abstract
The invention provides a system and a method for controlling synchronous display of spliced screens. Any unit of N video input units performs image collection on data to acquire video data and sends the video data and the video control information to M video output units; any unit of the M video output units acquires and buffers the laminated image block corresponding to a sub-display-screen connected with the unit according to the video control information, and sends a synchronous request to a synchronous control unit; the synchronous control unit detects if M synchronous requests are received; if yes, synchronous responses are generated and sent to the M video input units; any unit of the M video output units reads the buffered laminated image blocks according to the synchronous response and outputs the read laminated image block to the sub-display-screen connected with the unit according to a timing signal from the synchronous control unit. By adopting the system and the method provided by the invention, consistent and synchronous display of the laminated images during laminated display of multi-images can be realized and the precision of the synchronous display can be improved.
Description
Technical field
The present invention relates to video display technology, particularly a kind of Mosaic screen system and method for demonstration synchronously of controlling.
Background technology
At present; The screen splicing technology can be spliced into a monoblock giant-screen with the polylith display; Any display of the size of the screen that is spliced and resolution compared; All had to increase exponentially, but the video data that how to guarantee the video source transmission synchronously is shown on the monoblock giant-screen that is spliced into, and has become existing large screen display system problem demanding prompt solution.
Fig. 1 is the process flow diagram of existing distributed audio video synchronization display packing.Combine Fig. 1 at present, existing distributed audio video synchronization display packing is described, specific as follows:
Step 101: the connection request that service end is sent according to first client is set up data with first client and is connected, and multicast address is sent to first client;
Multicast address in this step can be the pre-assigned address information in order to transmitting video data of service end.
Step 102: first client begins to receive the video data that service end is sent on multicast address;
In this step, first client receives multicast address, and on multicast address, begins to receive the video data that service end is sent.
Step 103: the connection request that service end is sent according to second client is set up data with second client and is connected, and then multicast address is sent to second client;
Step 104: second client begins to receive the video data that service end is sent on multicast address;
In this step, second client receives multicast address, and on multicast address, begins to receive the video data that service end is sent.
Step 105: service end changes synchronous mark, and synchronous mark information and video data are sent to first client and second client with the multicast mode;
Multicast is a kind of tcp/ip communication agreement, and principle is that service end is sent a video data, and a plurality of clients that are connected with service end can be received with a video data simultaneously.
Synchronous mark information is in order to guarantee whether first client and second client can receive the variable integer of video data simultaneously.
Step 106: when first client and second client receive synchronous mark information, detect this synchronous mark information and change, then first client and second client abandon the video data that is received before, and receive new video data again;
In this step, first client and second client determine whether to abandon the video data that is received before according to synchronous mark information, can guarantee the consistance and the synchronism of the video data that first client and second client receive like this.
Step 107: first client and second client show according to the video data that receives;
In this step, first client and second client are pressed the frame display video data.Particularly; First client and second client are exported demonstration according to the demonstration time of every two field picture; And the sequencing of reference time, frame rate and every two field picture that the demonstration time of every two field picture is provided by service end is confirmed, the relative time that the reference time that is perhaps provided by service end and every two field picture show is confirmed.
Though existing distributed audio video synchronization display packing can guarantee the consistance of the video data of the service end transmission that first client and second client receive; But; The demonstration time of the every two field picture that adopts the transmitting synchronous flag information and obtain according to computed in software guarantees the method for display synchronization; Synchronization accuracy in the video Data Transmission process is lower, and existing distributed audio video synchronization display packing can't realize that many pictures lamination shows; Can't realize that more pictures lamination shows synchronously, be still waiting further improvement.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of system that Mosaic screen shows synchronously that controls, this system can realize when many pictures lamination shows that consistent the reaching synchronously of stacked graph picture shows, and can improve the precision of synchronous demonstration.
The object of the present invention is to provide a kind of method that Mosaic screen shows synchronously of controlling, this method can realize when many pictures lamination shows that consistent the reaching synchronously of stacked graph picture shows, and can improve the precision of synchronous demonstration.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of Mosaic screen system of demonstration synchronously that controls, this system comprises:
N video input block; Arbitrary video input block connects M video output unit; Arbitrary video input block carries out IMAQ to the data that receive and obtains video data, according to address information video data and video control information is sent to M video output unit; Said N is the integer greater than 1; Said video control information comprises the piece cut apart number, frame number and folded level number at least;
M video output unit; M the sub-display screen that connects synchronous control unit and completion large screen splicing; Arbitrary video output unit receives video data and the video control information that N video input block sends; Control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video, sends synchronization request to synchronous control unit, reads the lamination image block of buffer memory according to syn ack;
Said M video output unit is according to the timing signal from synchronous control unit, and the lamination image block that output is simultaneously read is connected sub-display screen extremely; Said M is the integer greater than 1;
Synchronous control unit connects M video output unit, detects whether to receive M synchronization request, if then generate syn ack and be sent to a said M video output unit, otherwise wait for the synchronization request from said video output unit.
In the said system, said video output unit comprises:
The display object receiver module; Connect said N video input block and lamination control module; The video control information from said N video input block to receiving is resolved; Obtain the corresponding piece of cutting apart of said video output unit number, frame number and folded level number, output video data, the piece cut apart number, frame number and folded level number to lamination control module;
The lamination control module; Connect output video memory module and said synchronous control unit,, the video data that receives is carried out image segmentation according to the piece of cutting apart number; According to frame number and folded level number; Image block after cutting apart is carried out lamination handle, obtain the lamination image block and write output video memory module, after writing the completion of output video memory module, send synchronization request to said synchronous control unit;
Output video memory module, the lamination image block that receives in order to buffer memory;
Read the video memory module; Connect said output video memory module, sub-display screen and said synchronous control unit; According to syn ack from said synchronous control unit; Read the lamination image block from said output video memory module, after the lamination image block is read in completion, export lamination image block to connected sub-display screen according to timing signal from said synchronous control unit.
In the said system, said synchronous control unit comprises:
Synchronous element connects a said M video output unit, detects whether to receive M synchronization request, if then generate syn ack and be sent to a said M video output unit, otherwise wait for the synchronization request from said video output unit;
Timer connects a said M video output unit, starts the back and generates timing signal and export a said M video output unit to.
In the said system, said lamination control module comprises:
The display object processing sub connects said display object receiver module and writes the video memory controlling sub, according to the piece of cutting apart that receives number; Video data to receiving carries out image segmentation; Obtain image block,, image block is carried out overlap-add procedure according to frame number that receives and folded level number; Obtain the superimposed image piece and export to write the video memory controlling sub, trigger and write the video memory controlling sub;
Write the video memory controlling sub, connect said output video memory module and synchronization request and produce submodule, the superimposed image piece is write said output video memory module, write back triggering synchronous request in completion and produce submodule according to triggering;
Synchronization request produces submodule, connects said synchronous control unit, generates synchronization request and sends to said synchronous control unit according to triggering.
In the said system, said synchronous element comprises:
Synchronized signal detector connects a said M video output unit, detects whether to receive M synchronization request, if then export trigger pip to synchronous generator, otherwise wait for the synchronization request from a said M video output unit;
Synchronous generator generates syn ack and exports M video output unit to according to trigger pip.
In the said system, said synchronous element is on-site programmable gate array FPGA or complex programmable logic device (CPLD).
A kind of Mosaic screen method of demonstration synchronously of controlling, this method comprises:
Arbitrary unit in A, the N video input block carries out IMAQ to the data that receive and obtains video data, and video data and video control information are sent to M video output unit;
Arbitrary unit in B, the M video output unit receives video data and the video control information that N video input block sends; Control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video, sends synchronization request to synchronous control unit;
C, synchronous control unit detect whether receive M synchronization request, if, generate syn ack and send to M video input block, and execution in step D, otherwise execution in step C;
Arbitrary unit in D, the M video output unit reads the lamination image block of buffer memory according to syn ack, and according to lamination image block to the connected sub-display screen that reads from the timing signal output of synchronous control unit;
Said N is the integer greater than 1; Said M is the integer greater than 1; Said video control information comprises the piece cut apart number, frame number and folded level number at least.
Preferably, further comprise before the said steps A:
Synchronous control unit generates timing signal and exports connected video output unit to after startup.
In the said method, step B is said, and control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video, sends synchronization request to synchronous control unit and comprises:
B1, said video control information is resolved, obtain for the piece of cutting apart of this video output unit number, frame number and folded level number;
B2, according to the piece cut apart number, the video data that receives is carried out image segmentation, according to frame number and folded level number, the image block after cutting apart is carried out lamination handles, obtain the lamination image block row cache of going forward side by side;
B3, accomplish the back at buffer memory and send extremely said synchronous control unit of synchronization request.
Visible by above-mentioned technical scheme; The invention provides a kind of system and method that Mosaic screen shows synchronously of controlling; Arbitrary unit in N video input block carries out IMAQ to the data that receive and obtains video data, according to address information video data and video control information is sent to M video output unit; Arbitrary unit in M video output unit receives the video data and the video control information of N video input block transmission; Control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video; Send synchronization request to synchronous control unit, read the lamination image block of buffer memory according to syn ack; M video output unit is according to the timing signal from synchronous control unit, and the lamination image block that output is simultaneously read is connected sub-display screen extremely; Synchronous control unit detects whether receive M synchronization request, if then generate syn ack and be sent to a said M video output unit, otherwise wait for the synchronization request from said video output unit.Adopt system and method for the present invention; Not only can realize that many pictures lamination shows; And can realize that when many pictures lamination shows the consistent of stacked graph picture reaches demonstration synchronously, and can show control synchronously through hardware logic, improved the precision of synchronous demonstration.
Description of drawings
Fig. 1 is the process flow diagram of existing distributed audio video synchronization display packing.
Fig. 2 controls the Mosaic screen structural representation of the system of demonstration synchronously for the present invention.
Fig. 3 is the structural representation of lamination control module of the present invention.
Fig. 4 controls the Mosaic screen process flow diagram of the method for demonstration synchronously for the present invention.
Embodiment
For make the object of the invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
The system and method that control Mosaic screen provided by the invention shows synchronously can carry out lamination to the data from a plurality of video source, and according to the number of the son screen that connects the image after superposeing is carried out division display, realizes that many pictures lamination shows; For guarantee to export cut apart after the synchronism of stacked graph picture; The synchronous control unit that comprises in the system of the present invention adopts hardware logic to control the synchronism of the image of a plurality of video output unit outputs; Promptly adopt hardware to generate syn ack and timing signal; And send to a plurality of video output units so that the stacked graph of a plurality of video output unit after output is cut apart as the time guarantee that simultaneously output synchronously is from the video data of identical a plurality of video source.
For sake of clarity, video input block of the present invention and video output unit are described at present, specific as follows: the N that the present invention mentions video input block is the Data Source that superimposed image is provided; The numerical value of N is confirmed by the amount of images that superposes; Such as, if accomplish the stack of 5 tomographic images, then the every tomographic image in 5 tomographic images comes from a video input block; This moment, N was 5, by that analogy; The numerical value of M is confirmed by the quantity of the sub-display screen that carries out screen splicing in the M that the present invention the mentions video output unit; Each video output unit is as one the tunnel, need show that to a sub-display screen image of output handles and synchro control, such as; If accomplish the screen splicing of 4 sub-display screens; Then need 4 video output units, M is 4, by that analogy.A M of the present invention video output unit and N video input block can be expanded according to the needs of screen splicing and superimposed image neatly, are not limited to the concrete numerical value in above-mentioned the giving an example.
Fig. 2 controls the Mosaic screen structural representation of the system of demonstration synchronously for the present invention.Combine Fig. 2 at present, the present invention is controlled the synchronous system that shows of Mosaic screen describe, specific as follows:
The system that control Mosaic screen of the present invention shows synchronously comprises: N video input block 21, a M video output unit 22 and synchronous control unit 23.Wherein, the arbitrary unit in N video input block 21 connects M video output unit 22, and M video output unit 22 connects the individual sub-display screen of the M that accomplishes Mosaic screens, M video output unit 22 of synchronous control unit 23 connections.N and M are the integer greater than 1.
The data of 21 pairs of inputs of arbitrary video input block are carried out IMAQ and are obtained video data; According to the address information of pre-assigned video output unit 22, video data is reached the video control information of mating with this video output unit 22 send to this video output unit 22.Wherein, obtain the video data of a tomographic image of realizing that the stack of N tomographic image is required in the video source of arbitrary video input block from N video source in N the video input block 21 mentioning of the present invention; The video control information comprises the piece cut apart number, frame number and folded level number at least, and is that the position of sub-display screen in spliced screen that is connected with this video output unit 22 confirmed corresponding to the video control information of each video output unit 22; The positional information of image in image after the piece of cutting apart number is cut apart in order to expression, it is corresponding one by one with the position of sub-display screen in spliced screen that video output unit 22 is connected; Frame number is in order to the position of presentation video in video data, to guarantee the consistance of output image; Folded level number is in order to represent the position in the image of this two field picture behind lamination, i.e. which layer is with the consistance of the stacked graph picture that guarantees output.
Arbitrary video output unit 22 receives video data and the video control information that N video input block 21 sends; Control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video; Send synchronization request to synchronous control unit 23, read the lamination image block of buffer memory according to syn ack.Particularly; Video output unit 22 is according to from the video control information of arbitrary video input block 21 video data from this video input block 21 that receives being carried out image segmentation; To superposeing, obtain connected sub-display screen output and show required lamination image block from the image block after the image segmentation of N video input block 21.
M video output unit 22 is according to the timing signal from synchronous control unit 23, and lamination image block to the connected sub-display screen that output is simultaneously read is exported consistent stacked graph picture simultaneously to guarantee M sub-display screen.
Wherein, video output unit 22 comprises: display object receiver module 221, lamination control module 222, output video memory module 223 and read video memory module 224.
The video control information from N video input block 21 that 221 pairs of display object receiver modules receive is resolved; Obtain the corresponding piece of cutting apart of video output unit 22 under the display object receiver module 221 number, frame number and folded level number, output video data, the piece cut apart number, frame number and folded level number to lamination control module 222.In order to guarantee the accuracy of image segmentation, also can further comprise the coordinate information of the position of sub-display screen in spliced screen of representing that display object receiver module 221 affiliated video output units 22 connect in the video control information.
The lamination image block that output video memory module 223 receives in order to buffer memory.
Read video memory module 224 according to syn ack from synchronous control unit 23; Read the lamination image block from output video memory module 223; After the lamination image block was read in completion, according to the timing signal from synchronous control unit 23, output lamination image block was to connected sub-display screen.
Wherein, synchronous control unit 23 comprises: synchronous element 231 and timer 2 32.Synchronous element 231 can adopt existing field programmable gate array (Field-Programmable Gate Array; FPGA) or CPLD (Complex Programmable Logic Device CPLD) realizes that hardware logic generates syn ack.
Timer 2 32 generates timing signal after startup, the output timing signal reaches in full accord to M video output unit 22 to guarantee the output display speed of reading video memory module 224 in M the video output unit 22.
Fig. 3 is the structural representation of lamination control module of the present invention.Combine Fig. 3 at present, lamination control module of the present invention is described, specific as follows:
Display object processing sub 2221 is according to piece of cutting apart that receives number and frame number; That two field picture to corresponding with frame number in the video data that receives carries out image segmentation; Obtain the image block corresponding,, a plurality of image blocks corresponding with frame number are carried out overlap-add procedure according to frame number that receives and folded level number with this frame number; Obtain the superimposed image piece and export to write video memory controlling sub 2222, trigger and write video memory controlling sub 2222.
Write video memory controlling sub 2222 and the superimposed image piece is write output video memory module 223, write back triggering synchronous request in completion and produce submodule 2223 according to triggering.
Synchronization request produces submodule 2223 and generates synchronization request according to triggering, and sends synchronization request and give the synchronous element 231 in the synchronous control unit 23.Wherein, portability has the identification information of video output unit 22 in the synchronization request.
Wherein, synchronous element comprises: synchronized signal detector and synchronous generator.Particularly, synchronized signal detector connects M video output unit 22, detects whether receive M synchronization request, if then export trigger pip to synchronous generator; Synchronous generator generates syn ack and exports M video output unit 22 to according to trigger pip.
Fig. 4 controls the Mosaic screen process flow diagram of the method for demonstration synchronously for the present invention.Combine Fig. 4 at present, the present invention is controlled the synchronous method that shows of Mosaic screen describe, specific as follows:
Step 301:N video input block output video data and video control information are to M video output unit;
Particularly, the arbitrary unit in N video input block 21 carries out IMAQ to the data that receive and obtains video data, and video data and video control information are sent to M video output unit 22.Wherein, the video control information can be the outside and directly exports video input block 21 to, also can be to be preset in the video input block 21.
The video control information comprises the piece cut apart number, frame number and folded level number at least.
Step 302: video output unit receives video data and the video control information that N video input block sends, and obtains corresponding lamination image block and the buffer memory of connected sub-display screen;
This step specifically comprises: step 3021, and 22 pairs of video control informations of video output unit are resolved, and obtain for the piece of cutting apart of this video output unit No. 22, frame number and folded level number; Step 3022, video output unit 22 carries out image segmentation according to piece of cutting apart number and frame number to image corresponding with frame number in the video data that receives, and obtains the image block corresponding with frame number; Step 3023, video output unit 22 are carried out the lamination processing according to frame number and folded level number to N the image block corresponding with frame number, the acquisition lamination image block row cache of going forward side by side.
Step 303: video output unit sends synchronization request to synchronous control unit;
This step is specially, and after video output unit 22 has confirmed to accomplish the buffer memory of lamination image block, generates synchronization request and is sent to synchronous control unit 23.Wherein, synchronization request carries the identification information of video output unit 22 at least.
Step 304: synchronous control unit detects whether receive M synchronization request, if, execution in step 305, otherwise execution in step 304;
This step is specially, and whether synchronous control unit 23 detects and receive in order to accomplish M the synchronization request that a screen splicing shows task, if then execution in step 305, otherwise execution in step 304.
Step 305: synchronous control unit generates syn ack and sends to M video output unit;
In this step, synchronous control unit 23 utilizes hardware to generate the syn ack of control synchronism, and adopts the mode of broadcasting to send to M video output unit 22 after receiving M synchronization request.
Step 306: video output unit reads the lamination image block of buffer memory according to syn ack;
This step is specially, and video output unit 22 reads the lamination image block of buffer memory according to the syn ack that receives, and performs the preparation that synchronous output shows.
Step 307:M video output unit is according to lamination image block to the connected sub-display screen that reads from the timing signal output of synchronous control unit;
This step is specially; M 22 same time of video output unit have received syn ack and have accomplished and read after the lamination image block of buffer memory; Timing signal according to synchronous control unit output; Export the lamination image block simultaneously to M sub-display screen, not only guaranteed the consistance of picture, and realized that high-precise synchronization output shows.
Step 308: finish.
Preferably, further comprise before the step 301: synchronous control unit generates timing signal and exports connected video output unit to after startup.
In the above-mentioned preferred embodiment of the present invention; No longer adopt software that data transmission and data output demonstration are carried out time control; But adopt hardware logic to generate the syn ack and the timing signal of control output display synchronization property; Avoided data can't guarantee the problem of in same clock, transmitting, synchronous control unit of the present invention adopts hardware to generate syn ack and timing signal, and the video output module accomplished image cut apart with lamination after utilize synchronization request notice synchronous control unit; So that synchronous control unit generates the syn ack of the synchronism of M video output unit of adjustment; In order to guarantee the consistance of time, synchronous control unit is also exported a timing signal to M video output unit, has further improved synchronization accuracy when output shows.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (9)
1. control the system that Mosaic screen shows synchronously for one kind, it is characterized in that this system comprises:
N video input block; Arbitrary video input block connects M video output unit; Arbitrary video input block carries out IMAQ to the data that receive and obtains video data, according to address information video data and video control information is sent to M video output unit; Said N is the integer greater than 1; Said video control information comprises the piece cut apart number, frame number and folded level number at least;
M video output unit; M the sub-display screen that connects synchronous control unit and completion large screen splicing; Arbitrary video output unit receives video data and the video control information that N video input block sends; Control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video, sends synchronization request to synchronous control unit, reads the lamination image block of buffer memory according to syn ack;
Said M video output unit is according to the timing signal from synchronous control unit, and the lamination image block that output is simultaneously read is connected sub-display screen extremely; Said M is the integer greater than 1;
Synchronous control unit connects M video output unit, detects whether to receive M synchronization request, if then generate syn ack and be sent to a said M video output unit, otherwise wait for the synchronization request from said video output unit.
2. system according to claim 1 is characterized in that, said video output unit comprises:
The display object receiver module; Connect said N video input block and lamination control module; The video control information from said N video input block to receiving is resolved; Obtain the corresponding piece of cutting apart of said video output unit number, frame number and folded level number, output video data, the piece cut apart number, frame number and folded level number to lamination control module;
The lamination control module; Connect output video memory module and said synchronous control unit,, the video data that receives is carried out image segmentation according to the piece of cutting apart number; According to frame number and folded level number; Image block after cutting apart is carried out lamination handle, obtain the lamination image block and write output video memory module, after writing the completion of output video memory module, send synchronization request to said synchronous control unit;
Output video memory module, the lamination image block that receives in order to buffer memory;
Read the video memory module; Connect said output video memory module, sub-display screen and said synchronous control unit; According to syn ack from said synchronous control unit; Read the lamination image block from said output video memory module, after the lamination image block is read in completion, export lamination image block to connected sub-display screen according to timing signal from said synchronous control unit.
3. system according to claim 1 is characterized in that, said synchronous control unit comprises:
Synchronous element connects a said M video output unit, detects whether to receive M synchronization request, if then generate syn ack and be sent to a said M video output unit, otherwise wait for the synchronization request from said video output unit;
Timer connects a said M video output unit, starts the back and generates timing signal and export a said M video output unit to.
4. system according to claim 2 is characterized in that, said lamination control module comprises:
The display object processing sub connects said display object receiver module and writes the video memory controlling sub, according to the piece of cutting apart that receives number; Video data to receiving carries out image segmentation; Obtain image block,, image block is carried out overlap-add procedure according to frame number that receives and folded level number; Obtain the superimposed image piece and export to write the video memory controlling sub, trigger and write the video memory controlling sub;
Write the video memory controlling sub, connect said output video memory module and synchronization request and produce submodule, the superimposed image piece is write said output video memory module, write back triggering synchronous request in completion and produce submodule according to triggering;
Synchronization request produces submodule, connects said synchronous control unit, generates synchronization request and sends to said synchronous control unit according to triggering.
5. system according to claim 3 is characterized in that, said synchronous element comprises:
Synchronized signal detector connects a said M video output unit, detects whether to receive M synchronization request, if then export trigger pip to synchronous generator, otherwise wait for the synchronization request from a said M video output unit;
Synchronous generator generates syn ack and exports M video output unit to according to trigger pip.
6. system according to claim 3 is characterized in that, said synchronous element is on-site programmable gate array FPGA or complex programmable logic device (CPLD).
7. control the method that Mosaic screen shows synchronously for one kind, it is characterized in that this method comprises:
Arbitrary unit in A, the N video input block carries out IMAQ to the data that receive and obtains video data, and video data and video control information are sent to M video output unit;
Arbitrary unit in B, the M video output unit receives video data and the video control information that N video input block sends; Control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video, sends synchronization request to synchronous control unit;
C, synchronous control unit detect whether receive M synchronization request, if, generate syn ack and send to M video input block, and execution in step D, otherwise execution in step C;
Arbitrary unit in D, the M video output unit reads the lamination image block of buffer memory according to syn ack, and according to lamination image block to the connected sub-display screen that reads from the timing signal output of synchronous control unit;
Said N is the integer greater than 1; Said M is the integer greater than 1; Said video control information comprises the piece cut apart number, frame number and folded level number at least.
8. method according to claim 7 is characterized in that, further comprises before the said steps A:
Synchronous control unit generates timing signal and exports connected video output unit to after startup.
9. according to claim 7 or 8 described methods, it is characterized in that step B is said, and control information obtains corresponding lamination image block and the buffer memory of connected sub-display screen according to video, sends synchronization request to synchronous control unit and comprises:
B1, said video control information is resolved, obtain for the piece of cutting apart of this video output unit number, frame number and folded level number;
B2, according to the piece cut apart number, the video data that receives is carried out image segmentation, according to frame number and folded level number, the image block after cutting apart is carried out lamination handles, obtain the lamination image block row cache of going forward side by side;
B3, accomplish the back at buffer memory and send extremely said synchronous control unit of synchronization request.
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