CN104935840A - Subtitle rolling display method of splicing display screen and system - Google Patents
Subtitle rolling display method of splicing display screen and system Download PDFInfo
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Abstract
The invention provides a subtitle scrolling display method of a splicing display screen and a system. The subtitle scrolling display method comprises steps of converting subtitle information and parameter information to a corresponding lattice data through receiving subtitle information and parameter information to be displayed which are inputted by the user and transmitting to a master control board, receiving and storing the lattice data and storing by a master control board, successively choosing corresponding continuous multi-frame lattice sub-data to be displayed according to the size of the splicing display screen and the parameter information, successively transmitting the lattice sub-data to a corresponding output board of the splicing screen, successively converting the corresponding sub-data of each frame to corresponding subtitle image data and performing image superposition with video image data to be displayed by the output board, transmitting the image data to the corresponding splicing display screen for displaying to finish the scrolling display of the subtitle. The subtitle rolling display method of splicing display screen and system realize the subtitle scrolling of the high definition real-time vector and bring great convenience.
Description
Technical field
The present invention relates to tiled display technical field, in particular a kind of captions rolling display packing of mosaic display screen and system.
Background technology
Along with in display terminal industry, on the display devices such as single monitor, display apparatus for commercial use, LED large-size screen monitors, roll titles superposition is a very practical function, facilitates client to issue real time information.But LCD(Liquid Crystal is Display, liquid crystal display) in large screen splicing system, based on the subtitle superposition function that separate unit concatenation unit realizes, often because display font is little, weak effect, need to utilize external splicing controller to realize across problems such as the bad adjustments of screen rolling consistency, and the scheme of many controllers is because display font definition is high or have the problems such as more limitation, often client is still willing to that being intended to additional LED dot matrix screen on LCD combination, to realize Subtitle Demonstration, adds additional unnecessary expense.
The existing controller realizing large screen splicing roll titles is the method adopting tradition to read dot matrix character data based on Embedded framework, amplify after and image carry out Overlapping display, the captions definition of this scheme display is not high, and the display of application large screen splicing is more serious compared with the crenellated phenomena of big font.Based PC I(Peripheral Component Interconnect, the standard of definition local bus) industrial control type splicing controller can realize the higher Subtitle Demonstration of definition, but the controller of this framework due to Video processing way few, the reason such as on the high side exits mainstream market.Because tiled display character has font size requirement high, the features such as Overlapping display data volume is large, realize difficulty and cost and be all difficult to balance, existingly realize the subtitle superposition of vector level also just based on single channel image based on FPGA, be applied to the small size character adding of simple channel information labeling.The captions rolling displaying scheme of existing mosaic display screen, cost is higher, and captions definition is low, brings inconvenience to user.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of captions rolling display packing and system of mosaic display screen, is intended to solve existing mosaic display screen captions rolling displaying scheme cost higher, the problem that captions definition is low.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A captions rolling display packing for mosaic display screen, wherein, comprises the following steps:
Receive caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information are converted to corresponding dot array data, and send to master control borad;
Master control borad receives described dot array data and stores, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively;
Each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions.
The captions rolling display packing of described mosaic display screen, wherein, described parameter information comprises: display font size, font color and captions rolling speed.
The captions rolling display packing of described mosaic display screen, wherein, the caption information to be shown of described reception user input and parameter information thereof, be converted to corresponding dot array data, and send to master control borad, specifically comprise by described caption information and parameter information:
Computer receives the caption information wanting to show of user's input, and display font size, font color and captions rolling velocity information that user is arranged;
According to described caption information, display font size, font color and captions rolling velocity information, read the vector font library that computer stores, generate corresponding dot array data;
Described dot array data is sent to master control borad.
The captions rolling display packing of described mosaic display screen, wherein, described master control borad receives described dot array data and stores, described parameter information is obtained according to described dot array data, from described dot array data, continuous multiple frames dot matrix subdata corresponding to be shown is chosen successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively, specifically comprises:
Master control borad receives described dot array data, and is stored in the memory on master control borad;
Master control borad is resolved described dot array data, obtains described font color and captions rolling velocity information;
From described dot array data, the dot matrix subdata of the corresponding width of continuous multiple frames is chosen successively according to the total pixel of the width of mosaic display screen and described captions rolling speed;
By chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively.
The captions rolling display packing of described mosaic display screen, wherein, each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by described output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions, specifically comprise:
Output board is the continuous multiple frames dot matrix subdata that sends over of receiving matrix chip successively, judges whether the data received are the dot matrix subdata that captions to be shown are corresponding, if yes, then described dot matrix subdata is converted to corresponding subtitle image data;
Successively each frame subtitle image data and vedio data to be shown are carried out after picture superposes, and be sent to corresponding mosaic display screen and show, to realize captions with described captions rolling speed roll display on mosaic display screen.
A captions rolling display system for mosaic display screen, wherein, comprising:
Caption information obtains and sending module, for receiving caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information being converted to corresponding dot array data, and sending to master control borad;
Dot array data chooses module, for receiving described dot array data by master control borad and storing, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively;
Roll display module, for successively each frame lattice subdata of its correspondence to be converted to corresponding subtitle image data by output board, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions.
The captions rolling display system of described mosaic display screen, wherein, described parameter information comprises: display font size, font color and captions rolling speed.
The captions rolling display system of described mosaic display screen, wherein, described caption information obtains and sending module, comprising:
Caption information acquiring unit, for being received the caption information wanting to show of user's input by computer, and display font size, font color and captions rolling velocity information that user is arranged;
Dot array data generation unit, for according to described caption information, display font size, font color and captions rolling velocity information, reads the vector font library that computer stores, generates corresponding dot array data;
Dot array data transmitting element, for sending to master control borad by described dot array data.
The captions rolling display system of described mosaic display screen, wherein, described dot array data chooses module, comprising:
Dot array data receiving element, for receiving described dot array data by master control borad, and is stored in the memory on master control borad;
Dot array data resolution unit, resolves described dot array data for master control borad, obtains described font color and captions rolling velocity information;
Dot matrix subdata chooses unit, for choosing the dot matrix subdata of the corresponding width of continuous multiple frames from described dot array data successively according to the total pixel of the width of mosaic display screen and described captions rolling speed;
Dot matrix subdata transmitting element, for sending to each frame lattice subdata of continuous print the output board that mosaic display screen is corresponding by chip matrix successively.
The captions rolling display system of described mosaic display screen, wherein, described roll display module, comprising:
Dot matrix subdata receives and judging unit, for the continuous multiple frames dot matrix subdata sended over by output board successively receiving matrix chip, judge whether the data received are the dot matrix subdata that captions to be shown are corresponding, if yes, then described dot matrix subdata is converted to corresponding subtitle image data;
Superposition and display unit, for successively each frame subtitle image data and vedio data to be shown being carried out after picture superposes, and the mosaic display screen being sent to correspondence shows, to realize captions with described captions rolling speed roll display on mosaic display screen.
The captions rolling display packing of a kind of mosaic display screen provided by the present invention and system, efficiently solve existing mosaic display screen captions rolling displaying scheme cost higher, the problem that captions definition is low, by receiving caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information are converted to corresponding dot array data, and send to master control borad; Master control borad receives described dot array data and stores, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively; Each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions; Under the prerequisite increasing few cost, for splicing controller provides a value-added functionality showing vector roll titles, compare traditional captions rolling function, there is display font super large, definition is high, rolling consistency is good, the lifting of the omnibearing effects such as subtitle font, size, color, transparency are arranged arbitrarily and function, achieve the roll titles realizing the real-time vector of high definition, bring and facilitate greatly.
Accompanying drawing explanation
Fig. 1 is the flow chart of the captions rolling display packing preferred embodiment of mosaic display screen provided by the invention;
Fig. 2 be the captions rolling display packing roll titles of mosaic display screen provided by the invention realize schematic diagram;
Fig. 3 is the structured flowchart of the captions rolling display system preferred embodiment of mosaic display screen provided by the invention;
Fig. 4 is the structural representation of the captions rolling display system Application Example of mosaic display screen provided by the invention.
Embodiment
The invention provides a kind of captions rolling display packing and system of mosaic display screen, for making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the flow chart of the captions rolling display packing preferred embodiment of mosaic display screen provided by the invention, and as shown in Figure 1, the captions rolling display packing of described mosaic display screen comprises the following steps:
Step S100, the caption information to be shown receiving user's input and parameter information thereof, be converted to corresponding dot array data, and send to master control borad by described caption information and parameter information;
Step S200, master control borad receive described dot array data and store, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively;
Each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by step S300, output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions.
Below in conjunction with specific embodiment, above-mentioned steps is described in detail.
In the step s 100, receive caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information are converted to corresponding dot array data, and send to master control borad.Specifically, described parameter information comprises: display font size, font color and captions rolling speed, and transparency etc.Receive caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information are converted to corresponding dot array data, and send to master control borad, specifically comprise: S110, computer receive the caption information wanting to show of user's input, and display font size, font color and captions rolling velocity information that user is arranged; S120, according to described caption information, display font size, font color and captions rolling velocity information, read the vector font library that computer stores, generate corresponding dot array data; S130, described dot array data is sent to master control borad.
The master control borad mentioned in the present invention, chip matrix, output board, tablet and display screen are the splicing controller framework of existing FPGA framework, are prior art.The FPGA controller hardware structure of existing mosaic screen comprises master control borad, chip matrix, output board, tablet and display screen.Wherein, the function of tablet mainly converts the vision signal of input to high speed serialization video streaming to output board by custom protocol, output board is mainly through FPGA(Field-Programmable Gate Array, field programmable gate array) the order that sends of master control borad realize to the convergent-divergent of multi-channel video signal with superpose, finally connect by multiple display screen the image display pattern that spell shape becomes various, this is the basic function of large-screen splicing controller, wherein any road input can be switched to any road output by chip matrix, and can 1 road input signal be copied in all output at most, be exactly briefly have any switching laws of signal and any copy function, its model can be the family chips such as M21121.In prior art, vedio data to be shown is entered display screen display by video source after tablet, chip matrix and output board.Master control borad is connection matrix chip then, controls each output board.These hardware devices are prior art, do not do too much description herein.
The acquisition of conventional characters overlaying scheme word-base data has special character library flash, has GB Chinese characters in common use dot matrix word library collection, read by Chinese character encoding table the information that corresponding address date can get required character pattern data.But due to limited storage space, the character pattern data of 16*16,32*32,64*64 pixel generally also can only be stored.And watch at a distance in combination (mosaic display screen) application request, font size at least wants the size of 1/4 of support screen, calculating according to the screen of 1920*1080 resolution is exactly at least need a word to have 960*540 resolution, if reached the resolution of 960*540 by 64*64 interpolation, font is fuzzy or zigzag certainly.Big font is shown clear, then need to calculate reduction and obtain font information by reading vector font library (vector font library is a kind of character repertoire recording the Vector Message of each character.Its general principle is according to certain Mathematical Modeling, the Stroke decomposition of each character is become the various straight line and curve that define in Mathematical Modeling, then writes down the parameter of these straight lines and curve.When display according to concrete size, draw these lines according to the parameter recorded again, just reduce original character), this mode shortcoming is to calculate relative complex, transfer to the process of every block output board can take more FPGA resource, increase cost.
For solving traditional scheme super large font display sawtooth, the present invention uses vector font library and is directly obtained by computer terminal and need issue caption information to convert dot array data to according to user and is issued to splicing equipment by network.Because roll titles in use, the rolling content of display is compiled in advance, in this scenario, can not need by flash chip, everyday character Vector Message to be stored in advance, and mosaic screen all can join a control PC, the control software design that the present invention just utilizes PC to hold, reads the vector font library under windows, the font size arranged according to user and content generate the dot array data showing and need, and send master control borad to by network.
When practical application, the method that computer obtains dot array data has a variety of, directly can read vector font library under windows, lattice information is become by Program transformation, also the font of windows can be utilized to select control, the Chinese character of needs is drawn on display buffer, directly go to read corresponding buffering area dot array data, the acquisition of vector dot array data is very ripe, do not do and too much repeat, needs should be mentioned that, the transmission problem of dot array data, because finally display is the mode of lining by line scan, so the data transfer mode got is from left to right mode from top to bottom, conveniently DDR allocation space and storage simultaneously, the total resolution control of display character is the integral multiple of 8, be conducive to programming, such speed of service is faster, in addition except 0 of each point, outside 1 information, also need the overall font color information of a transmission 24bit, the relevant parameters such as rolling speed.
In step s 200, master control borad receives described dot array data and stores, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively.
Specifically, master control borad receives described dot array data, and is stored in the memory on master control borad; Master control borad is resolved described dot array data, obtains described font color and captions rolling velocity information; From described dot array data, the dot matrix subdata of the corresponding width of continuous multiple frames is chosen successively according to the total pixel of the width of mosaic display screen and described captions rolling speed; By chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively.
When practical application, hold dot array data corresponding to generated vector fonts can greatly reduce the operand of receiving terminal (master control borad) at PC, but data volume can increase a lot, with the calculation of a word 960*540 resolution, design only need show pure color font, i.e. some 1bit data, a word is exactly 960*540=518.4Kbit, 1000 words then need the memory space of 518.4Mbit, application scenario does not need power down to store, and master control borad itself carries the FPGA for other function, so the present invention selects to increase a memory on this master control borad FPGA, the for example DDR3 of 1Gbit, the dot array data of the needs display sended over is held for storing PC.Then, master control borad is resolved described dot array data, obtains described font color and captions rolling velocity information.Master control borad single-chip microcomputer, except responsible parsing is with except the normal concatenation order of forwarding, is also responsible for the dot character data that simple decoding sends with forwarding computer control software.Master control borad forwarding data sends its FPGA to parallel bus, its FPGA is isolated the parameter information (comprising display font size, rolling speed, font color etc.) in data by data resolution module, parameter information is sent to DDR Read-write Catrol module, effective dot array data of separation enters FIFO and waits for DDR write.DDR arbitration modules is then responsible for the request of data responding Read-write Catrol module in turn, reads by writing data into memory (such as above-mentioned DDR3) or from memory (such as above-mentioned DDR3).
Then, from described dot array data, the dot matrix subdata of the corresponding width of continuous multiple frames is chosen successively according to the total pixel of the width of mosaic display screen and described captions rolling speed; By chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively.Namely DDR read control module reads the dot array data of one fixed width at every turn according to the total pixel of display splicing screen width, slides reading data window start-stop address according to the speed preset, and output board below can be made to receive the real time data of a width rolling.Be one of key point of the present invention herein, illustrate as follows:
Suppose that user wants display 100 words, the size of font, color and rolling speed set at computer terminal all.After user inputs this 100 word, the dot array data that Practical computer teaching is corresponding is sent to master control borad.If after the size of the total pixel of the width of mosaic display screen and font compares, find that mosaic display screen can only show at most 10 words, from the dot array data of 100 words, so then choose the dot matrix subdata of 10 words, this dot matrix character data correspondence is sent to mosaic display screen and shows by master control borad again.In order to realize the effect of captions rolling display, master control borad also will choose the continuous multiple frames dot matrix subdata of the total pixel of width of corresponding mosaic display screen from dot array data according to captions rolling speed, specifically, this is one by one because mosaic display screen shows image, so master control borad selects continuous multiple frames dot matrix subdata (data of 10 words), namely selects multiframe according to the data of 10 words of captions rolling speed scroll.10 words of each frame lattice subdata that master control borad is chosen from described dot array data are all different, correspondence is the word according to the continuous displacement of captions rolling speed at 10 words of tiled display screen display, thus it is different by the caption data shown one by one, against the relation of each frame caption data inherence, achieve visual captions rolling display effect.
In step S300, each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions.Specifically, output board is the continuous multiple frames dot matrix subdata that sends over of receiving matrix chip successively, judge whether the data received are the dot matrix subdata that captions to be shown are corresponding, if yes, then described dot matrix subdata is converted to corresponding subtitle image data; Then, successively each frame subtitle image data and vedio data to be shown are carried out after picture superposes, and be sent to corresponding mosaic display screen and show, to realize captions with described captions rolling speed roll display on mosaic display screen.
When practical application, for ensureing the performance of output board process image, the process that output board increases subtitling image is simplified as far as possible, workload is transferred on master control borad, require that the data that master control borad sends can intercept very well and facilitate generating video frame data, here when normal function output board imaging importing framework is constant, open up multiplexing for roll titles of a SERDES passage, first judge data whether roll titles data, then the switching carrying out decode logic is selected, convert the DDR memory field of picture frame data stored in passage in advance to, Overlapping display below does not need to change the mode Overlapping display that just caption data can be superposed with picture.Wherein, SERDES is the abbreviation of English SERializer (serializer)/DESerializer (deserializer).
In order to the collaborative work of master control borad and output board is better described, further illustrate captions rolling principle of the present invention, the rolling effect of captions shows the zones of different image of view picture captions by each moment, at consecutive image and the rolling effect that produces in the time.
Refer to Fig. 2, as shown in Figure 2, user needs roll display " the glad security protection comprehensive management platform of group " these 10 words, be presented at above combination, combination Width is spliced by 3 screens, then received the dot array data also having stored single-chip microcomputer by row and forwarded by master control borad FPGA, forms certain address mapping relation according to the captions beam overall of display is high with DDR, generate data line column address, and data often row pixel number be the integral multiple of 8.For master control borad, according to Fig. 2, tri-moment of a->b->c slide and take out the identical data display of initial data row address different pieces of information size, a, b, c moment every block output board only needs the data of getting fixed block address according to oneself numbering, the effect that just can realize rolling of getting up continuously in time.Like this, be exactly select corresponding dot matrix subdata according to the width of mosaic screen, and according to captions rolling speed successively choice point a period of time data one by one backward, chosen by the dot matrix subdata of continuous multiple frames and corresponding display, just can realize the roll display effect of captions.The a according to time order and function order as shown in Figure 2, in tri-moment of b, c, correspondence chooses same length but the different dot matrix subdata of content, in tiled display screen display, just achieves the roll display of captions.
The captions rolling display packing of mosaic display screen provided by the invention, particularly based on large-screen splicing controller, achieve the real-time vector roll titles of high definition, under the prerequisite only increasing few cost, the splicing device of FPGA framework realizes big font, color font is adjustable arbitrarily, the high definition vector roll titles that display synchronism is consistent.The splicing device of FPGA framework is the splicing controller framework of current main flow, the process that the video input that can realize any multichannel number flexibly goes out to export, the present invention is based on the splicing device of existing FPGA framework, utilize data throughput capabilities and the flexibility of FPGA, propose a kind of caption data and concentrate storage, the method Ultra Low Cost of real-time broadcast realizes the roll titles of mosaic screen display super large font without sawtooth vector level high definition.
Based on the captions rolling display packing of above-mentioned mosaic display screen, present invention also offers a kind of captions rolling display system of mosaic display screen, refer to Fig. 3, Fig. 3 is the structured flowchart of the captions rolling display system preferred embodiment of mosaic display screen provided by the invention, as shown in Figure 3, the captions rolling display system of described mosaic display screen comprises:
Caption information obtains and sending module 10, for receiving caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information being converted to corresponding dot array data, and sending to master control borad; Specifically as described in step S100;
Dot array data chooses module 20, for receiving described dot array data by master control borad and storing, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively; Specifically as described in step S200;
Roll display module 30, for successively each frame lattice subdata of its correspondence to be converted to corresponding subtitle image data by output board, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions; Specifically as described in step S300.
Further, described parameter information comprises: display font size, font color and captions rolling speed.
Further, described caption information obtains and sending module 10, comprising:
Caption information acquiring unit, for being received the caption information wanting to show of user's input by computer, and display font size, font color and captions rolling velocity information that user is arranged;
Dot array data generation unit, for according to described caption information, display font size, font color and captions rolling velocity information, reads the vector font library that computer stores, generates corresponding dot array data;
Dot array data transmitting element, for sending to master control borad by described dot array data.
Further, described dot array data chooses module 20, comprising:
Dot array data receiving element, for receiving described dot array data by master control borad, and is stored in the memory on master control borad;
Dot array data resolution unit, resolves described dot array data for master control borad, obtains described font color and captions rolling velocity information;
Dot matrix subdata chooses unit, for choosing the dot matrix subdata of the corresponding width of continuous multiple frames from described dot array data successively according to the total pixel of the width of mosaic display screen and described captions rolling speed;
Dot matrix subdata transmitting element, for sending to each frame lattice subdata of continuous print the output board that mosaic display screen is corresponding by chip matrix successively.
Further, described roll display module 30, comprising:
Dot matrix subdata receives and judging unit, for the continuous multiple frames dot matrix subdata sended over by output board successively receiving matrix chip, judge whether the data received are the dot matrix subdata that captions to be shown are corresponding, if yes, then described dot matrix subdata is converted to corresponding subtitle image data;
Superposition and display unit, for successively each frame subtitle image data and vedio data to be shown being carried out after picture superposes, and the mosaic display screen being sent to correspondence shows, to realize captions with described captions rolling speed roll display on mosaic display screen.
Refer to Fig. 4, Fig. 4 is the structural representation of the captions rolling display system Application Example of mosaic display screen provided by the invention.As shown in the figure, the hardware of the captions rolling display system of described mosaic display screen comprises computer, master control borad, chip matrix, output board, tablet and display screen.Wherein, tablet is for inputting vedio data to be shown, and these hardware are prior art.It should be noted that, output board and display screen are not one-to-one relationship, and an output board can control multiple display screen, and this is prior art, does not repeat herein.
As seen from Figure 4, data trend is from computer-> master control borad-> matrix-> output board-> display screen, existing FPGA controller framework only needs additionally increase a slice DDR3 for data cached at master control borad, the generation of computer primary responsibility data, the display and control of master control borad primary responsibility data and coding, the copy broadcast of matrix primary responsibility data, output board primary responsibility data superpose with video, each several part co-operation can realize the value-added functionality of vector character superposition on former framework.
The present invention obtains dot array data by computer, directly can read vector font library under windows, lattice information is become by Program transformation, also the font of windows can be utilized to select control, the Chinese character of needs is drawn on display buffer, directly go to read corresponding buffering area dot array data, the acquisition of vector dot array data is very ripe, does not do and too much repeats.It should be noted that, the transmission problem of dot array data, because finally display is the mode of lining by line scan, so the data transfer mode got is from left to right mode from top to bottom, simultaneously conveniently DDR allocation space and storage, the total resolution of display character control be 8 integral multiple be conducive to programming.
Master control borad is responsible for resolving and the normal concatenation order of forwarding, is also responsible for the dot character data that simple decoding sends with forwarding computer control software.In order to reduce the storage burden of every block output board, so utilize the principle of tiled display, use master control borad real-time broadcast data, master control borad FPGA is inputted by SERDES HSSI High-Speed Serial Interface (bandwidth reaches as high as 3.2Gbps) access matrix chip, every block output board is arrived, to complete the broadcast of data by chip matrix reproducing signals.Every block output board only needs the partial data obtaining needs display according to the numbering of oneself to show, the effect of rolling then shows by master control borad real-time transform the effect that data can produce rolling, in order to ensure that data are across screen roll display synchronism, only need after transferring every two field picture, to provide a more new data flag in real-time broadcast data stream, each screen according to this more new data flag carry out the renewal of displaying contents.
In output board, according to displaying principle, the imaging importing of two pairs not homology, need to use DDR buffer memory to ensure the synchronous of frame per second and data rate, need data cached at output board, because character data occupies the video input passage of an output board, then data buffer storage multiplexingly can be made in the DDR space originally processing that road video, then superpose with original image and just can be synchronized.For ensureing the performance of output board process image, the process that output board increases subtitling image is simplified as far as possible, workload is transferred on master control borad, require that the data that master control borad sends can intercept very well and facilitate generating video frame data, here when normal function output board imaging importing framework is constant, open up multiplexing for roll titles of a SERDES passage, first judge data whether roll titles data, then the switching carrying out decode logic is selected, convert the DDR memory field of picture frame data stored in passage in advance to, Overlapping display below does not need to change the mode Overlapping display that just caption data can be superposed with picture.
When practical application, output board mainly adopts 8b/10b to decode, serdes passage 8b/10b coded data is reduced by 8b/10b decoder module primary responsibility, one of characteristic of 8b/10b coding ensures DC balance, adopt 8b/10b coded system, " 0 ", " 1 " quantity sent can be made to keep basically identical, continuous print " 1 " or " 0 " are no more than 5, namely one " 0 " or " 1 " must be inserted behind every 5 continuous print " 1 " or " 0 ", thus ensure signal DC balance, when link time-out, unlikely generation DC lacks of proper care, and ensures the correctness of transfer of data.The taking-up of data is that each output board carries out choosing the partial data in requisition for display according to the display screen size of the numbering of oneself and correspondence, is then sent to corresponding display screen and shows.How to choose corresponding data about each output board, this realizes in existing mosaic display screen video playback, does not do too much description herein.When practical application, the size of each display screen of mosaic display screen is identical, therefore by data mean allocation.When each display screen of mosaic display screen is not of uniform size, data allocations can be carried out according to the size correspondence of each display screen.
In sum, the captions rolling display packing of a kind of mosaic display screen provided by the invention and system, apply for large-screen splicing, propose a set of from PC-> splicing equipment-> display unit solution, the mode of employing data centralization storing real-time broadcasting can under the prerequisite increasing few cost, for splicing controller provides a value-added functionality showing vector roll titles, compare traditional captions rolling function, there is display font super large, definition is high, rolling consistency is good, subtitle font, size, color, the lifting of the omnibearing effects such as transparency is arranged arbitrarily and function, bring and facilitate greatly.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (10)
1. a captions rolling display packing for mosaic display screen, is characterized in that, comprise the following steps:
Receive caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information are converted to corresponding dot array data, and send to master control borad;
Master control borad receives described dot array data and stores, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively;
Each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions.
2. the captions rolling display packing of mosaic display screen according to claim 1, is characterized in that, described parameter information comprises: display font size, font color and captions rolling speed.
3. the captions rolling display packing of mosaic display screen according to claim 2, it is characterized in that, the caption information to be shown of described reception user input and parameter information thereof, be converted to corresponding dot array data by described caption information and parameter information, and send to master control borad, specifically comprise:
Computer receives the caption information wanting to show of user's input, and display font size, font color and captions rolling velocity information that user is arranged;
According to described caption information, display font size, font color and captions rolling velocity information, read the vector font library that computer stores, generate corresponding dot array data;
Described dot array data is sent to master control borad.
4. the captions rolling display packing of mosaic display screen according to claim 2, it is characterized in that, described master control borad receives described dot array data and stores, described parameter information is obtained according to described dot array data, from described dot array data, continuous multiple frames dot matrix subdata corresponding to be shown is chosen successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively, specifically comprises:
Master control borad receives described dot array data, and is stored in the memory on master control borad;
Master control borad is resolved described dot array data, obtains described font color and captions rolling velocity information;
From described dot array data, the dot matrix subdata of the corresponding width of continuous multiple frames is chosen successively according to the total pixel of the width of mosaic display screen and described captions rolling speed;
By chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively.
5. the captions rolling display packing of mosaic display screen according to claim 2, it is characterized in that, each frame lattice subdata of its correspondence is converted to corresponding subtitle image data by described output board successively, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions, specifically comprise:
Output board is the continuous multiple frames dot matrix subdata that sends over of receiving matrix chip successively, judges whether the data received are the dot matrix subdata that captions to be shown are corresponding, if yes, then described dot matrix subdata is converted to corresponding subtitle image data;
Successively each frame subtitle image data and vedio data to be shown are carried out after picture superposes, and be sent to corresponding mosaic display screen and show, to realize captions with described captions rolling speed roll display on mosaic display screen.
6. a captions rolling display system for mosaic display screen, is characterized in that, comprising:
Caption information obtains and sending module, for receiving caption information to be shown and the parameter information thereof of user's input, described caption information and parameter information being converted to corresponding dot array data, and sending to master control borad;
Dot array data chooses module, for receiving described dot array data by master control borad and storing, described parameter information is obtained according to described dot array data, from described dot array data, choose continuous multiple frames dot matrix subdata corresponding to be shown successively according to mosaic display screen size and described parameter information, by chip matrix, each frame lattice subdata of continuous print is sent to the output board that mosaic display screen is corresponding successively;
Roll display module, for successively each frame lattice subdata of its correspondence to be converted to corresponding subtitle image data by output board, each frame subtitle image data of its correspondence is carried out picture with vedio data to be shown and superposes by output board successively, and send to corresponding mosaic display screen display successively, to complete the roll display of captions.
7. the captions rolling display system of mosaic display screen according to claim 6, is characterized in that, described parameter information comprises: display font size, font color and captions rolling speed.
8. the captions rolling display system of mosaic display screen according to claim 7, is characterized in that, described caption information obtains and sending module, comprising:
Caption information acquiring unit, for being received the caption information wanting to show of user's input by computer, and display font size, font color and captions rolling velocity information that user is arranged;
Dot array data generation unit, for according to described caption information, display font size, font color and captions rolling velocity information, reads the vector font library that computer stores, generates corresponding dot array data;
Dot array data transmitting element, for sending to master control borad by described dot array data.
9. the captions rolling display system of mosaic display screen according to claim 7, is characterized in that, described dot array data chooses module, comprising:
Dot array data receiving element, for receiving described dot array data by master control borad, and is stored in the memory on master control borad;
Dot array data resolution unit, resolves described dot array data for master control borad, obtains described font color and captions rolling velocity information;
Dot matrix subdata chooses unit, for choosing the dot matrix subdata of the corresponding width of continuous multiple frames from described dot array data successively according to the total pixel of the width of mosaic display screen and described captions rolling speed;
Dot matrix subdata transmitting element, for sending to each frame lattice subdata of continuous print the output board that mosaic display screen is corresponding by chip matrix successively.
10. the captions rolling display system of mosaic display screen according to claim 7, is characterized in that, described roll display module, comprising:
Dot matrix subdata receives and judging unit, for the continuous multiple frames dot matrix subdata sended over by output board successively receiving matrix chip, judge whether the data received are the dot matrix subdata that captions to be shown are corresponding, if yes, then described dot matrix subdata is converted to corresponding subtitle image data;
Superposition and display unit, for successively each frame subtitle image data and vedio data to be shown being carried out after picture superposes, and the mosaic display screen being sent to correspondence shows, to realize captions with described captions rolling speed roll display on mosaic display screen.
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