CN102903332B - A kind of asynchronous controlling method of LED display and asynchronous control-card - Google Patents
A kind of asynchronous controlling method of LED display and asynchronous control-card Download PDFInfo
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- CN102903332B CN102903332B CN201210409220.0A CN201210409220A CN102903332B CN 102903332 B CN102903332 B CN 102903332B CN 201210409220 A CN201210409220 A CN 201210409220A CN 102903332 B CN102903332 B CN 102903332B
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Abstract
The invention provides a kind of asynchronous controlling method and asynchronous control-card of LED display, be mainly used in solving the defect of mentioned prior art in background technology, while this asynchronous controlling method and asynchronous controlling are stuck in and ensure that Asynchronism Card its own band is carried, support cascade receiving card, its load capacity, up to 720x480, makes the display screen within 720x480 can both adopt asynchronous control system to reduce costs.Display screen is configured more flexible, use convenient.
Description
Technical field
The present invention is applied to the asynchronous control system field of LED display, particularly high-resolution video playback asynchronous control system field.
Background technology
Existing LED display control system is mainly divided into two classes: synchronous control system, asynchronous control system.
Synchronous control system refers to and is shown in real time in LED display by the picture that computer shows, and its connected mode generally adopts host computer → sending card → receiving card → LED display.Synchronous control system requires that each LED display wants at least one host computer, sending card, a receiving card, and therefore, on the display screen of small size, the cost of synchronous control system is higher.
Asynchronous control system refers to and is put on asynchronous control-card by broadcasting media by USB flash disk, serial ports, SD card or network, and asynchronous control-card self carries out control display, without the need to host computer and sending card; Compared with synchro system, asynchronous control system can save cost.But existing asynchronous control system load capacity limited (320x256), so its application scenario is more limited.
Summary of the invention
The invention provides a kind of asynchronous controlling method and asynchronous control-card of LED display, be mainly used in solving the defect of mentioned prior art in background technology, while this asynchronous controlling method and asynchronous controlling are stuck in and ensure that Asynchronism Card its own band is carried, support cascade receiving card, its load capacity, up to 720x480, makes the display screen within 720x480 can both adopt asynchronous control system to reduce costs.
Concrete technical solution of the present invention is as follows:
The asynchronous controlling method of this LED display, comprises the following steps:
1] playing list of target setting LED display and reproduction time, needs the video and/or audio play by target LED, and playing list, reproduction time generate data-signal, then this data-signal be sent to the asynchronous control-card of target LED display;
2] after asynchronous control-card receives the data-signal sent through step 1, it stored and change, when storing conversion, do not distinguish the rank addresses of data-signal, be directly converted to the signal can play-overed for LED display by data-signal Coutinuous store and by data-signal;
3], when the time of asynchronous control-card arrives the reproduction time of step 1 generation, according to playing list, the video stored is play.
In above-mentioned steps 2, the storage of data-signal specifically asynchronous control-card read and write a coordinate be (x, y) pixel number according to time, storage address is (x+y*W).Wherein W is picture traverse.
In above-mentioned steps 2, requisite space requirement when the storage space of asynchronous control-card can meet cascade more receiving card.
In above-mentioned steps 1, asynchronous control-card data-signal being sent to target LED display adopts SD card or USB flash disk to insert asynchronous control-card to trigger asynchronous control-card, and asynchronous control-card enters step 2 after receiving trigger pip and processes.
In above-mentioned steps 1, asynchronous control-card data-signal being sent to target LED display adopts network signal to trigger asynchronous control-card, and asynchronous control-card enters step 2 after receiving trigger pip and processes.
This asynchronous control-card comprises the data output interface be connected with LED display, for the media interface that media import, also comprise read for media, media resolve and the microprocessor module of video frequency output, video data for inputting media interface is changed and the data processing module of gray-coded, the media store module that the video data for inputting media interface stores; Described microprocessor module one end is connected with media interface, and the other end is connected with media store module and data processing module one end respectively, and the data processing module other end is connected with data output interface.
Also comprise the cascaded-output interface for being connected with the receiving card that increase is with section to amass, cascaded-output interface is connected with data processing module.
Above-mentioned microprocessor module comprises arm processor, and arm processor is connected with video output circuit with non-volatile storage, DDR flash memory, audio output circuit respectively.
Above-mentioned data processing module comprises FPGA, and FPGA is connected with external memory storage and output driving circuit respectively, and the input end of FPGA is connected with video output circuit and audio output circuit, and the output terminal of FPGA is connected with external memory storage, output driving circuit respectively.
Above-mentioned data output interface is HUB interface.
Above-mentioned media interface is network interface, USB flash disk socket and/or SD card plug.
Advantage of the present invention is as follows:
The asynchronous controlling method of this LED display and asynchronous control-card are integrated with the function of host computer, sending card, receiving card simultaneously, and integrated level is high; Relative to existing asynchronous control-card and control method, it drastically increases load capacity, makes the load capacity of asynchronous control-card be increased to 720*480 from 320*256, reduces use and the job costs of large LED display screen; Meanwhile, support its own band provided by the invention is carried and cascade receiving card, display screen is configured more flexible, uses convenient.
Accompanying drawing is detailed
Fig. 1 is principle of the invention schematic diagram;
Fig. 2 is structural representation of the present invention;
Fig. 3 is processing flow chart of the present invention.
Embodiment
The asynchronous controlling method of this LED display, comprises the following steps:
1] playing list of target setting LED display and reproduction time, target LED is needed the video and/or audio play, and playing list and reproduction time generate data-signal, again this data-signal is sent to the asynchronous control-card of target LED display, asynchronous control-card be realize whole control system function execution, realize unit, be also the core of whole method;
In step 1, asynchronous control-card data-signal being sent to target LED display adopts SD card or USB flash disk to insert asynchronous control-card to trigger asynchronous control-card, and asynchronous control-card enters step 2 after receiving trigger pip and processes; The asynchronous control-card that also data-signal can be sent to target LED display adopts network signal to trigger asynchronous control-card, and asynchronous control-card enters step 2 after receiving trigger pip and processes.
2] after asynchronous control-card receives the data-signal sent through step 1, it stored and change, when storing conversion, do not distinguish the rank addresses of data-signal, be directly converted to the signal can play-overed for LED display by data-signal Coutinuous store and by data-signal;
General storage space algorithm: low a few bit address represents image column address, high a few bit address represents picture line address; When storing the view data of 720x480, column address needs 10 (9 can only characterize 512 length), and row address needs 9.Always take 19, take 1024x512 (2^19) individual space; Read and write a coordinate be (x, y) pixel number according to time, only with by x assignment to column address, y assignment, to row address, can operate;
And storage space algorithm of the present invention not distinguishing rows, column address, by view data Coutinuous store.For the view data of 720x480, needing space i.e. 720x480, is approximately 2/3 of 1024x512.Read and write a coordinate be (x, y) pixel number according to time, storage address is (x+y*W).Wherein W is picture traverse.
When selecting network signal to trigger in step 1, after asynchronous controlling is stuck in and receives trigger pip, carry out the process of following steps respectively according to different orders:
2.1] data-signal of playing list, reproduction time, video and/or audio is received;
2.2] receiving system optimum configurations, is sent to data handling system and carries out data processing after successful Received signal strength;
2.3] retaking of a year or grade of receiving system parameter, reads data by FPGA, and the data read are sent it back request end;
3], when the time of asynchronous control-card arrives the reproduction time of step 1 generation, according to playing list, the video stored is play.
Asynchronous controlling method provided by the invention is realized by asynchronous control-card, this asynchronous control-card comprises the data output interface be connected with LED display, for the media interface that media import, read for media, media resolve and the microprocessor module of video frequency output, microprocessor module comprises arm processor, and arm processor is connected with video output circuit with non-volatile storage, DDR flash memory, audio output circuit respectively; Data processing module is used for being stored by video data, changing, and carry out gray-coded realization according to different LED drive chip, data processing module comprises FPGA, FPGA is connected with external memory storage and output driving circuit respectively, the input end of FPGA is connected with video output circuit and audio output circuit, and the output terminal of FPGA is connected with external memory storage, output driving circuit respectively; For the media store module that the video data inputted media interface stores; Microprocessor module one end is connected with media interface, and media interface comprises network or USB flash disk or SD card etc., is the approach that media import; The microprocessor module other end is connected with media store module and data processing module one end respectively, and the data processing module other end is connected with data output interface, and data output interface is generally HUB interface, for connecting LED display interface.
Also comprise the cascaded-output interface for being connected with the receiving card that increase is with section to amass, cascaded-output interface is connected with data processing module.
Claims (9)
1. an asynchronous controlling method for LED display, is characterized in that, comprise the following steps:
1] playing list of target setting LED display and reproduction time, target LED display is needed the video and/or audio play, and playing list, reproduction time generation data-signal, then this data-signal is sent to the asynchronous control-card of target LED display;
2] after asynchronous control-card receives the data-signal sent through step 1, it stored and change, when storing conversion, do not distinguish the rank addresses of data-signal, be directly converted to the signal can play-overed for LED display by data-signal Coutinuous store and by data-signal; Wherein, the storage mode of described data-signal is: asynchronous control-card read and write a coordinate be (x, y) pixel number according to time, storage address is (x+y*W), and wherein W is picture traverse;
3], when the time of asynchronous control-card arrives the reproduction time of step 1 generation, according to playing list, the video stored is play.
2. the asynchronous controlling method of LED display according to claim 1, is characterized in that: in described step 2, requisite space requirement when the storage space of asynchronous control-card is used for meeting cascade more receiving card.
3. the asynchronous controlling method of LED display according to claim 2, it is characterized in that: in described step 1, asynchronous control-card data-signal being sent to target LED display adopts SD card or USB flash disk to insert asynchronous control-card to trigger asynchronous control-card, and asynchronous control-card enters step 2 after receiving trigger pip and processes.
4. the asynchronous controlling method of LED display according to claim 2, it is characterized in that: in described step 1, asynchronous control-card data-signal being sent to target LED display adopts network signal to trigger asynchronous control-card, and asynchronous control-card enters step 2 after receiving trigger pip and processes.
5. an asynchronous control-card, comprise the data output interface be connected with LED display, for the media interface that media import, it is characterized in that: also comprise read for media, media resolve and the microprocessor module of video frequency output, video data for inputting media interface is changed and the data processing module of gray-coded, the media store module that the video data for inputting media interface stores; Described microprocessor module one end is connected with media interface, and the other end is connected with media store module and data processing module one end respectively, and the data processing module other end is connected with data output interface; Described data processing module does not distinguish the rank addresses of data-signal when process data signal, the signal can play-overed for LED display is directly converted to by data-signal Coutinuous store and by data-signal, wherein, the storage mode of described data-signal is: it is (x that asynchronous control-card reads and writes a coordinate, y) pixel number according to time, storage address is (x+y*W), and wherein W is picture traverse.
6. asynchronous control-card according to claim 5, is characterized in that: also comprise the cascaded-output interface for being connected with the receiving card that increase is with section to amass, cascaded-output interface is connected with data processing module.
7. asynchronous control-card according to claim 6, is characterized in that: above-mentioned microprocessor module comprises arm processor, and arm processor is connected with video output circuit with non-volatile storage, DDR flash memory, audio output circuit respectively.
8. asynchronous control-card according to claim 7, it is characterized in that: described data processing module comprises FPGA, FPGA is connected with external memory storage and output driving circuit respectively, the input end of FPGA is connected with video output circuit and audio output circuit, and the output terminal of FPGA is connected with external memory storage, output driving circuit respectively.
9. asynchronous control-card according to claim 8, is characterized in that: described data output interface is HUB interface; Media interface is network interface, USB flash disk socket and/or SD card plug.
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| CN103226541A (en) * | 2013-03-29 | 2013-07-31 | 江苏复芯物联网科技有限公司 | Embedded high-performance heterogeneous computing platform based on FPGA and ARM |
| CN103745682B (en) * | 2013-07-03 | 2017-03-15 | 上海视恒电子科技有限公司 | A kind of method of asynchronous cascade |
| CN106356021B (en) * | 2015-07-14 | 2020-02-14 | 西安诺瓦星云科技股份有限公司 | Method for reducing electromagnetic interference of LED display screen and LED display control card |
| CN105549930B (en) * | 2015-12-07 | 2019-02-26 | 西安诺瓦电子科技有限公司 | LED display control system and USB Type-C adapter |
| CN108769761A (en) * | 2018-05-17 | 2018-11-06 | 深圳市灵星雨科技开发有限公司 | A kind of LED control and play system asynchronous play method |
| CN109256084B (en) * | 2018-10-29 | 2023-11-14 | 深圳市摩西尔电子有限公司 | Cascade LED display screen control card, control method for realizing cascade connection and HDMI signal processing method |
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| JPH08191385A (en) * | 1995-01-11 | 1996-07-23 | Matsushita Electric Ind Co Ltd | Facsimile equipment and method for preparing cover sheet |
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| CN1722811A (en) * | 2004-07-15 | 2006-01-18 | 上海乐金广电电子有限公司 | Storage controller of digital television |
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Address after: 710075 DEF101, Zero One Square, Xi'an Software Park, No. 72 Zhangbajie Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: XI'AN NOVASTAR TECH Co.,Ltd. Address before: 710075 Qinfengge D District 401, Xi'an Software Park, 68 Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: Xi'an NovaStar Tech Co.,Ltd. |