CN102637120B - 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 system and method for controlling Mosaic screen simultaneous display.
Background technology
At present, screen splicing technology can be spliced into polylith display one monoblock giant-screen, the size of the screen being spliced is compared any display with resolution, had and increased exponentially, but the video data that how to guarantee video source transmission is synchronously shown on the monoblock giant-screen being spliced into, and has become existing large screen display system problem demanding prompt solution.
Fig. 1 is the process flow diagram of existing distributed video synchronous display method.Now, in conjunction with Fig. 1, existing distributed video synchronous display method is described, specific as follows:
Step 101: the connection request that service end sends according to the first client is set up data with the first client and is connected, and multicast address is sent to the 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: the first client starts to receive the video data that service end sends on multicast address;
In this step, the first client multicast address, and on multicast address, start to receive the video data that service end sends.
Step 103: the connection request that service end sends according to the second client is set up data with the second client and is connected, and then multicast address is sent to the second client;
Step 104: the second client starts to receive the video data that service end sends on multicast address;
In this step, the second client multicast address, and on multicast address, start to receive the video data that service end sends.
Step 105: service end changes synchronous mark, and synchronous mark information and video data are sent to the first client and the second client in multicast mode;
Multicast is a kind of tcp/ip communication agreement, and principle is that service end sends 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 to guarantee whether the first client and the second client can receive the variable integer of video data simultaneously.
Step 106: the first client and the second client during to synchronous mark information, detect this synchronous mark information and change, the video data that the first client and the second client receive before abandoning, and again receive new video data;
In this step, the first client and the second client determine whether to abandon the video data receiving before according to synchronous mark information, can guarantee like this consistance and the synchronism of the video data that the first client and the second client arrive.
Step 107: the first client and the second client show according to the video data receiving;
In this step, the first client and the second client be display video data frame by frame.Particularly, the first client and the second client are carried out output display according to the displaying time of every two field picture, and the sequencing of the reference time that the displaying time of every two field picture is provided by service end, frame rate and every two field picture is determined, or the relative time of the reference time being provided by service end and the demonstration of every two field picture is determined.
Although existing distributed video synchronous display method can guarantee the consistance of the video data that the service end of the first client and the second client sends, but, the displaying time of the every two field picture that adopts transmitting synchronous flag information and obtain according to software calculating guarantees to show synchronous method, synchronization accuracy in video data transmitting process is lower, and, existing distributed video synchronous display method cannot be realized many pictures lamination and show, more cannot realize many pictures lamination simultaneous display, need further improvement.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of system of controlling Mosaic screen simultaneous display, this system can realize the consistent and simultaneous display of stacked graph picture when many pictures lamination shows, and can improve the precision of simultaneous display.
The object of the present invention is to provide a kind of method of controlling Mosaic screen simultaneous display, the method can realize the consistent and simultaneous display of stacked graph picture when many pictures lamination shows, and can improve the precision of simultaneous display.
For achieving the above object, technical scheme of the present invention is specifically achieved in that
Control a system for Mosaic screen simultaneous display, this system comprises:
N video input unit, arbitrary video input unit connects M video output unit, arbitrary video input unit carries out image acquisition 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; Described N is greater than 1 integer; Described video control information at least comprises the piece cut apart number, frame number and folded level number;
M video output unit, connect synchronous control unit and complete M sub-display screen of large screen splicing, arbitrary video output unit receives video data and the video control information that N video input unit sends, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen, send synchronization request to synchronous control unit, according to syn ack, read the lamination image block of buffer memory;
Described M video output unit is according to the timing signal from synchronous control unit, and the lamination image block that output is read is simultaneously to connected sub-display screen; Described M is greater than 1 integer;
Synchronous control unit, connects M video output unit, detects whether receive M synchronization request, if so, generates syn ack and is sent to a described M video output unit, otherwise wait for the synchronization request from described video output unit.
In said system, described video output unit comprises:
Show object receiver module, connect described N video input unit and lamination control module, the video control information from described N video input unit receiving is resolved, obtain the piece of cutting apart that described video output unit is corresponding number, frame number and folded level number, output video data, the piece cut apart number, frame number and folded level number are to lamination control module;
Lamination control module, connect output video memory module and described synchronous control unit, according to the piece number of cutting apart, the video data receiving is carried out to image to be cut apart, according to frame number and folded level number, image block after cutting apart is carried out to lamination processing, obtain lamination image block and also write output video memory module, send synchronization request to described synchronous control unit writing after output video memory module completes;
Output video memory module, the lamination image block receiving in order to buffer memory;
Read video memory module, connect described output video memory module, sub-display screen and described synchronous control unit, according to the syn ack from described synchronous control unit, from described output video memory module, read lamination image block, read after lamination image block completing, according to the timing signal output lamination image block from described synchronous control unit to connected sub-display screen.
In said system, described synchronous control unit comprises:
Synchronous element, connects a described M video output unit, detects whether receive M synchronization request, if so, generates syn ack and is sent to a described M video output unit, otherwise wait for the synchronization request from described video output unit;
Timer, connects a described M video output unit, after starting, generates timing signal and exports a described M video output unit to.
In said system, described lamination control module comprises:
Show object handles submodule, connect described demonstration object receiver module and write video memory and control submodule, according to the piece number of cutting apart receiving, the video data receiving is carried out to image to be cut apart, obtain image block, according to the frame number receiving and folded level number, image block is carried out to overlap-add procedure, obtain superimposed image piece and export to and write video memory control submodule, trigger and write video memory control submodule;
Write video memory and control submodule, connect described output video memory module and synchronization request and produce submodule, according to triggering, superimposed image piece is write to described output video memory module, complete write after triggering synchronous request produce submodule;
Synchronization request produces submodule, connects described synchronous control unit, according to triggering, generates synchronization request and sends to described synchronous control unit.
In said system, described synchronous element comprises:
Synchronized signal detector, connects a described M video output unit, detects whether receive M synchronization request, if so, exports trigger pip to synchronous generator, otherwise waits for the synchronization request from a described M video output unit;
Synchronous generator, generates syn ack and exports M video output unit to according to trigger pip.
In said system, described synchronous element is on-site programmable gate array FPGA or complex programmable logic device (CPLD).
A method of controlling Mosaic screen simultaneous display, the method comprises:
Arbitrary unit in A, N video input unit carries out image acquisition 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, a M video output unit receives video data and the video control information that N video input unit sends, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen, send synchronization request to synchronous control unit;
C, synchronous control unit detect whether receive M synchronization request, and if so, generate syn ack and send to M video input unit, and performing step D, otherwise execution step C;
Arbitrary unit in D, a M video output unit reads the lamination image block of buffer memory according to syn ack, and the lamination image block reading according to the timing signal output from synchronous control unit is to connected sub-display screen;
Described N is greater than 1 integer; Described M is greater than 1 integer; Described video control information at least comprises the piece cut apart number, frame number and folded level number.
Preferably, before described steps A, further comprise:
Synchronous control unit, after startup, generates timing signal and exports connected video output unit to.
In said method, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen described in step B, send synchronization request to synchronous control unit and comprise:
B1, described 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 number cut apart, the video data receiving is carried out to image and cuts apart, according to frame number and folded level number, the image block after cutting apart is carried out to lamination processing, obtain the lamination image block row cache of going forward side by side;
B3, after completing, buffer memory sends synchronization request to described synchronous control unit.
As seen from the above technical solutions, the invention provides a kind of system and method for controlling Mosaic screen simultaneous display, arbitrary unit in N video input unit carries out image acquisition 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 video data and the video control information that N video input unit sends, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen, send synchronization request to synchronous control unit, according to syn ack, read the lamination image block of buffer memory; M video output unit is according to the timing signal from synchronous control unit, and the lamination image block that output is read is simultaneously to connected sub-display screen; Synchronous control unit detects whether receive M synchronization request, if so, generates syn ack and is sent to a described M video output unit, otherwise wait for the synchronization request from described video output unit.Adopt system and method for the present invention, not only can realize many pictures lamination shows, and when many pictures lamination shows, can realize the consistent and simultaneous display of stacked graph picture, and can carry out simultaneous display control by hardware logic, improved the precision of simultaneous display.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of existing distributed video synchronous display method.
Fig. 2 is the structural representation that the present invention controls the system of Mosaic screen simultaneous display.
Fig. 3 is the structural representation of lamination control module of the present invention.
Fig. 4 is the process flow diagram that the present invention controls the method for Mosaic screen simultaneous display.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The system and method for control Mosaic screen simultaneous display provided by the invention, can carry out lamination to the data from a plurality of video source, and according to the number of the son screen connecting, the Image Segmentation Using after superposeing is shown, realizes many pictures lamination and shows; In order to guarantee the synchronism of stacked graph picture after the cutting apart of output, the synchronous control unit comprising in system of the present invention adopts hardware logic to control the synchronism of the image of a plurality of video output unit outputs, 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 time guarantee that synchronous output is from the video data of identical a plurality of video source simultaneously.
For sake of clarity, now video input of the present invention unit and video output unit are described, specific as follows: the N that the present invention mentions a video input unit is for providing the Data Source of superimposed image, the numerical value of N is determined by the amount of images superposeing, such as, if complete the stack of 5 tomographic images, the every tomographic image in 5 tomographic images comes from a video input unit, now N is 5, by that analogy; In the M that the present invention a mentions video output unit, the numerical value of M is determined by the quantity of carrying out the sub-display screen of screen splicing, each video output unit is as a road, to a sub-display screen, need to show that the image of output processes and synchro control, such as, if complete the screen splicing of 4 sub-display screens, need 4 video output units, M is 4, by that analogy.A M of the present invention video output unit and N video input unit can be expanded neatly according to the needs of screen splicing and superimposed image, are not limited to the concrete numerical value in above-mentioned giving an example.
Fig. 2 is the structural representation that the present invention controls the system of Mosaic screen simultaneous display.Now, in conjunction with Fig. 2, the system of the present invention being controlled to Mosaic screen simultaneous display describes, specific as follows:
The system of control Mosaic screen simultaneous display of the present invention comprises: N video input unit 21, a M video output unit 22 and synchronous control unit 23.Wherein, the arbitrary unit in N video input unit 21 connects M video output unit 22, and M video output unit 22 connected M sub-display screen of Mosaic screen, and synchronous control unit 23 connects M video output unit 22.N and M are the integer that is greater than 1.
The data of the 21 pairs of inputs in arbitrary video input unit are carried out image acquisition and are obtained video data, according to the address information of pre-assigned video output unit 22, video data and the video control information of mating with this video output unit 22 are sent to this video output unit 22.Wherein, in the video source of the arbitrary video input unit in N the video input unit 21 that the present invention mentions from N video source, obtain and realize the superpose video data of a required tomographic image of N tomographic image; Video control information at least comprises the piece cut apart number, frame number and folded level number, and is the sub-display screen that is connected with this video output unit 22 location positionings in spliced screen corresponding to the video control information of each video output unit 22; The positional information of image after the piece of cutting apart number is cut apart in order to expression in image, its sub-display screen connecting with video output unit 22 position in spliced screen is corresponding one by one; Frame number is the position in video data in order to presentation video, 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 after lamination, i.e. which layer, to guarantee the consistance of the stacked graph picture of output.
Arbitrary video output unit 22 receives video data and the video control information that N video input unit 21 sends, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen, send synchronization request to synchronous control unit 23, according to syn ack, read the lamination image block of buffer memory.Particularly, video output unit 22 is cut apart according to the video data from this video input unit 21 receiving being carried out to image from the video control information of arbitrary video input unit 21, image block after cutting apart from the image of N video input unit 21 is superposeed, obtain the required lamination image block of connected sub-display screen output display.
M video output unit 22 be according to the timing signal from synchronous control unit 23, and the lamination image block that output is read is simultaneously to connected sub-display screen, to guarantee that M sub-display screen export consistent stacked graph picture simultaneously.
Synchronous control unit 23 detects whether receive M synchronization request, if so, generates syn ack and is sent to M video output unit 22, otherwise wait for the synchronization request from video output unit 22.Wherein, synchronous control unit 23 is to utilize hardware circuit to generate the syn ack signal that guarantees synchronism, and synchronous control unit 23 will generate timing signal after system starts operation, and export the timing signal of generation to video output unit 22 that system comprises, so that video output unit 22 is after having completed buffer memory lamination image block, according to syn ack and timing signal, export lamination image block simultaneously.
Wherein, video output unit 22 comprises: show object receiver module 221, lamination control module 222, output video memory module 223 and read video memory module 224.
221 pairs of video control informations from N video input unit 21 that receive of demonstration object receiver module are resolved, the piece of cutting apart number, frame number and the folded level number that to show video output unit 22 correspondences under object receiver module 221, output video data, the piece cut apart number, frame number and folded level number are to lamination control module 222.For the accuracy that guarantees that image is cut apart, in video control information, also can further comprise the coordinate information that represent to show sub-display screen that the video output units 22 under object receiver module 221 the connect position in spliced screen.
Lamination control module 222 is according to the piece number of cutting apart, image corresponding with frame number in the video data receiving is carried out to image to be cut apart, obtain the image block after corresponding with frame number cutting apart, according to frame number and folded level number, image block after corresponding with frame number cutting apart is carried out to lamination processing, obtain lamination image block and also write output video memory module 223, after writing output video memory module 223 and completing, send synchronization request to synchronous control unit 23.Wherein, in synchronization request, portability has the identification information of the affiliated video output unit 22 of lamination control module 222, so that synchronous control unit 23 can generate syn ack exactly.
The lamination image block that output video memory module 223 receives in order to buffer memory.
Read video memory module 224 according to the syn ack from synchronous control unit 23, from output video memory module 223, read lamination image block, read after lamination image block completing, according to the timing signal from synchronous control unit 23, output lamination image block is 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) realize hardware logic and generate syn ack.
Synchronous element 231 detects whether receive M synchronization request, if so, generates syn ack and is sent to M video output unit 22, otherwise wait for the synchronization request from video output unit 22.Wherein, synchronous element 231 adopts the mode of broadcast to send syn ack to M video output unit 22 in system.
Timer 2 32 generates timing signal after startup, and output timing signal is to M video output unit 22, to guarantee that the output display speed of reading video memory module 224 in M video output unit 22 reaches in full accord.
Fig. 3 is the structural representation of lamination control module of the present invention.Now, in conjunction with Fig. 3, lamination control module of the present invention is described, specific as follows:
Lamination control module 222 of the present invention comprises: show object handles submodule 2221, write video memory control submodule 2222 and synchronization request generation submodule 2223.Wherein, show that object handles submodule 2221 connects demonstration object receiver module 221 and writes video memory and control submodule 2222, write video memory and control submodule 2222 connection output video memory modules and synchronization request generation submodule 2223, synchronization request produces submodule 2223 and connects synchronous element 231.
Show that object handles submodule 2221 is according to the piece of cutting apart receiving number and frame number, that two field picture corresponding with frame number in the video data receiving is carried out to image to be cut apart, obtain the image block corresponding with this frame number, according to the frame number receiving and folded level number, a plurality of image blocks corresponding with frame number are carried out to overlap-add procedure, obtain superimposed image piece and export to and write video memory control submodule 2222, trigger and write video memory control submodule 2222.
Write video memory and control submodule 2222, according to triggering, superimposed image piece is write to output video memory module 223, complete write after triggering synchronous request produce submodule 2223.
Synchronization request produces submodule 2223 and generates synchronization request according to triggering, and sends synchronization request to the synchronous element 231 in synchronous control unit 23.Wherein, in synchronization request, portability has the identification information of video output unit 22.
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 so, exports trigger pip to synchronous generator; Synchronous generator generates syn ack and exports M video output unit 22 to according to trigger pip.
Fig. 4 is the process flow diagram that the present invention controls the method for Mosaic screen simultaneous display.Now, in conjunction with Fig. 4, the method for the present invention being controlled to Mosaic screen simultaneous display describes, specific as follows:
Step 301:N video input unit output video data and video control information are to M video output unit;
Particularly, the arbitrary unit in N video input unit 21 carries out image acquisition 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, video control information can be outside and directly exports video input unit 21 to, also can be and is preset in video input unit 21.
Video control information at least comprises the piece cut apart number, frame number and folded level number.
Step 302: video output unit receives video data and the video control information that N video input unit sends, and obtains lamination image block buffer memory that connected sub-display screen is corresponding;
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, according to the piece of cutting apart number and frame number, carries out image to image corresponding with frame number in the video data receiving and cuts apart, and obtains the image block corresponding with frame number; Step 3023, video output unit 22 is according to frame number and folded level number, and N the image block corresponding with frame number carried out to lamination processing, 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 video output unit 22 has been determined after the buffer memory of lamination image block, generates synchronization request and is sent to synchronous control unit 23.Wherein, synchronization request at least carries the identification information of video output unit 22.
Step 304: synchronous control unit detects whether receive M synchronization request, if so, execution step 305, otherwise execution step 304;
This step is specially, and synchronous control unit 23 detects whether received M the synchronization request that a screen splicing shows task, if so, performs step 305, otherwise execution step 304.
Step 305: synchronous control unit generates syn ack and sends to M video output unit;
In this step, synchronous control unit 23, after receiving M synchronization request, utilizes hardware to generate the syn ack of controlling synchronism, and adopts the mode of broadcast to send to M video output unit 22.
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, according to the syn ack receiving, reads the lamination image block of buffer memory, performs the preparation of synchronous output display.
The lamination image block that step 307:M video output unit reads according to the timing signal output from synchronous control unit is to connected sub-display screen;
This step is specially, after M same time of video output unit 22 has received syn ack and has completed the lamination image block that reads buffer memory, according to the timing signal of synchronous control unit output, export lamination image block to M sub-display screen simultaneously, not only guarantee the consistance of picture, and realized high-precise synchronization output display.
Step 308: finish.
Preferably, before step 301, further comprise: synchronous control unit, after startup, generates timing signal and exports connected video output unit to.
In above-mentioned preferred embodiment of the present invention, no longer adopt software to carry out time control to data transmission and data output display, but adopt hardware logic to generate syn ack and the timing signal of controlling output display synchronism, avoided data cannot guarantee the problem of transmitting in same clock, synchronous control unit of the present invention adopts hardware to generate syn ack and timing signal, and video output module completed 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 adjusting M video output unit, when output display in order to guarantee the consistance of time, synchronous control unit is also exported a timing signal to M video output unit, further improved synchronization accuracy.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (9)
1. a system of controlling Mosaic screen simultaneous display, is characterized in that, this system comprises:
N video input unit, arbitrary video input unit connects M video output unit, arbitrary video input unit carries out image acquisition 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; Described N is greater than 1 integer; Described video control information at least comprises the piece cut apart number, frame number and folded level number;
M video output unit, connect synchronous control unit and complete M sub-display screen of large screen splicing, arbitrary video output unit receives video data and the video control information that N video input unit sends, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen, send synchronization request to synchronous control unit, according to syn ack, read the lamination image block of buffer memory;
Described M video output unit is according to the timing signal from synchronous control unit, and the lamination image block that output is read is simultaneously to connected sub-display screen; Described M is greater than 1 integer;
Synchronous control unit, connects M video output unit, detects whether receive M synchronization request, if so, generates syn ack and is sent to a described M video output unit, otherwise wait for the synchronization request from described video output unit.
2. system according to claim 1, is characterized in that, described video output unit comprises:
Show object receiver module, connect described N video input unit and lamination control module, the video control information from described N video input unit receiving is resolved, obtain the piece of cutting apart that described video output unit is corresponding number, frame number and folded level number, output video data, the piece cut apart number, frame number and folded level number are to lamination control module;
Lamination control module, connect output video memory module and described synchronous control unit, according to the piece number of cutting apart, the video data receiving is carried out to image to be cut apart, according to frame number and folded level number, image block after cutting apart is carried out to lamination processing, obtain lamination image block and also write output video memory module, send synchronization request to described synchronous control unit writing after output video memory module completes;
Output video memory module, the lamination image block receiving in order to buffer memory;
Read video memory module, connect described output video memory module, sub-display screen and described synchronous control unit, according to the syn ack from described synchronous control unit, from described output video memory module, read lamination image block, read after lamination image block completing, according to the timing signal output lamination image block from described synchronous control unit to connected sub-display screen.
3. system according to claim 1, is characterized in that, described synchronous control unit comprises:
Synchronous element, connects a described M video output unit, detects whether receive M synchronization request, if so, generates syn ack and is sent to a described M video output unit, otherwise wait for the synchronization request from described video output unit;
Timer, connects a described M video output unit, after starting, generates timing signal and exports a described M video output unit to.
4. system according to claim 2, is characterized in that, described lamination control module comprises:
Show object handles submodule, connect described demonstration object receiver module and write video memory and control submodule, according to the piece number of cutting apart receiving, the video data receiving is carried out to image to be cut apart, obtain image block, according to the frame number receiving and folded level number, image block is carried out to overlap-add procedure, obtain superimposed image piece and export to and write video memory control submodule, trigger and write video memory control submodule;
Write video memory and control submodule, connect described output video memory module and synchronization request and produce submodule, according to triggering, superimposed image piece is write to described output video memory module, complete write after triggering synchronous request produce submodule;
Synchronization request produces submodule, connects described synchronous control unit, according to triggering, generates synchronization request and sends to described synchronous control unit.
5. system according to claim 3, is characterized in that, described synchronous element comprises:
Synchronized signal detector, connects a described M video output unit, detects whether receive M synchronization request, if so, exports trigger pip to synchronous generator, otherwise waits for the synchronization request from a described 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, described synchronous element is on-site programmable gate array FPGA or complex programmable logic device (CPLD).
7. a method of controlling Mosaic screen simultaneous display, is characterized in that, the method comprises the following steps:
Arbitrary unit in A, N video input unit carries out image acquisition 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, a M video output unit receives video data and the video control information that N video input unit sends, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen, send synchronization request to synchronous control unit;
C, synchronous control unit detect whether receive M synchronization request, and if so, generate syn ack and send to M video input unit, and performing step D, otherwise execution step C;
Arbitrary unit in D, a M video output unit reads the lamination image block of buffer memory according to syn ack, and the lamination image block reading according to the timing signal output from synchronous control unit is to connected sub-display screen;
Described N is greater than 1 integer; Described M is greater than 1 integer; Described video control information at least comprises the piece cut apart number, frame number and folded level number.
8. method according to claim 7, is characterized in that, before described steps A, further comprises:
Synchronous control unit, after startup, generates timing signal and exports connected video output unit to.
9. according to the method described in claim 7 or 8, it is characterized in that, according to video control information, obtain corresponding lamination image block the buffer memory of connected sub-display screen described in step B, send synchronization request to synchronous control unit and comprise:
B1, described 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 number cut apart, the video data receiving is carried out to image and cuts apart, according to frame number and folded level number, the image block after cutting apart is carried out to lamination processing, obtain the lamination image block row cache of going forward side by side;
B3, after completing, buffer memory sends synchronization request to described synchronous control unit.
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| CN111355861A (en) * | 2020-05-25 | 2020-06-30 | 深圳市康帕斯科技发展有限公司 | Multi-screen video synchronous splicing device and method |
| CN112865905A (en) * | 2021-01-11 | 2021-05-28 | 南通滨睿智能科技有限公司 | Online equipment control system and method |
| CN112950951B (en) * | 2021-01-29 | 2023-05-02 | 浙江大华技术股份有限公司 | Intelligent information display method, electronic device and storage medium |
| CN115148113A (en) * | 2021-03-30 | 2022-10-04 | 西安青松光电技术有限公司 | Display device and control method of LED display screen |
| CN113286098B (en) * | 2021-05-27 | 2022-09-06 | 深圳爱特天翔科技有限公司 | Image processing method and image splicing equipment |
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