CN103389889A - LED (light-emitting diode) display screen safe playing method and video controller - Google Patents
LED (light-emitting diode) display screen safe playing method and video controller Download PDFInfo
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- CN103389889A CN103389889A CN2013103067367A CN201310306736A CN103389889A CN 103389889 A CN103389889 A CN 103389889A CN 2013103067367 A CN2013103067367 A CN 2013103067367A CN 201310306736 A CN201310306736 A CN 201310306736A CN 103389889 A CN103389889 A CN 103389889A
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Abstract
The invention relates to an LED (light-emitting diode) display screen safe playing method and a video controller. The method comprises the steps: transmitting a first verification code to a communication interface of the video controller, wherein the first verification code comprises information of feature codes which uniquely identify a playing device; transmitting an image data stream which carries a second verification code to a video interface of the video controller by using the playing device, wherein the second verification code comprises the information of the feature codes which uniquely identify the playing device; analyzing the second verification code carried by the image data stream by using the video controller, and judging whether the second verification code is matched with the first verification code which is obtained from the communication interface, wherein if the second verification code is matched with the first verification code, image data in the image data stream is transmitted to an LED display screen for being displayed by using the video controller. With the adoption of the safe playing method and the video controller disclosed by the invention, image data which are played with an unbound playing device which is used by an illegal user can be correctly recognized and can be intercepted and treated, illegal video images cannot be displayed on the LED display screen, and the safe playing performance of the LED display screen is enhanced.
Description
Technical field
The present invention relates to the display control technology field, particularly the safe player method of a kind of LED display and Video Controller.
Background technology
Existing LED (Light Emitting Diode, light emitting diode) display screen controlling media play system can be distinguished into LED display synchronous control system and LED display asynchronous control system according to the difference of control mode.Wherein, synchronous control system mainly comprises usually plays computing machine, Video Controller (also claiming to send card) and LED display, playing computing machine blocks with LED display and is connected by transmission, therefore the image content of LED display broadcast is consistent with the content of computing machine broadcast, and LED display can't be play media in case computing machine shuts down.The LED display asynchronous control system mainly comprises asynchronous control card (a kind of card of embedded Control with arm processor) and LED display, asynchronous control card has been integrated the necessary function of the broadcast computing machine in the synchronous control system and the function that sends card, so LED display need not to be connected to computing machine when playing media.At present, the LED display synchronous control system is mainly used to real-time display video, picture and text, notice etc., and is multiplex in indoor or outdoor full color big screen display screen; The LED display asynchronous control system is mainly used to show that various words, symbol and figure or animation are main; Therefore, the application demand of LED display synchronous control system is relatively many.
For the LED display synchronous control system, the video output interface of playing computing machine is connected by connecting line with the video input interface that sends card, and on the broadcast computing machine, playout software is installed, playout software is decoded into film source to be played to send for example rgb video image data stream of the receptible image data stream of card, sends card and again the rgb video view data is sent on LED display and shows in real time.
Yet, particularly existing LED display synchronous control system is play in security the just direct illegal video of broadcast on LED display of the video output that exists very large hidden danger, lawless person only need change broadcast computing machine with illegal video source, playout software is installed, connects the broadcast computing machine after changing by connecting line and the video input interface that sends card in LED display.
Summary of the invention
Have for solving LED display in prior art the technological deficiency of playing potential safety hazard, the invention provides the safe player method of a kind of LED display and a kind of Video Controller.
Particularly, the safe player method of a kind of LED display provided by the invention, be applied to playing device, the Video Controller that is connected with playing device and with LED display that Video Controller is connected between.The safe player method of LED display comprises step: playing device transmits the first identifying code to the communication interface of Video Controller, and the first identifying code comprises the information of the condition code of unique identification playing device; Playing device transmits to the video interface of Video Controller the image data stream that carries the second identifying code, and the second identifying code comprises the information of the condition code of unique identification playing device; And Video Controller parses the second identifying code that carries in image data stream, and whether judgement the second identifying code that parses and the first identifying code that obtains from communication interface mate, if coupling, Video Controller is sent to LED display with the view data in image data stream and shows.
In addition, a kind of Video Controller that the embodiment of the present invention provides, be suitable for connecting playing device and LED display.Video Controller comprises communication interface, video interface, authentication module and display control module.Wherein, communication interface is used for receiving the first identifying code of playing device, and the first identifying code comprises the information of the condition code of unique identification playing device.Video interface is used for receiving the image data stream that carries the second identifying code that playing device transmits, and the second identifying code comprises the information of the condition code of unique identification playing device.Authentication module is used for parsing the second identifying code that image data stream carries, and whether judgement the second identifying code that parses and the first identifying code that obtains from communication interface mate.Display control module is used for the view data in image data stream being sent to LED display showing when judging the second identifying code and the first identifying code for coupling.
The first identifying code of the information of the condition code of the present invention by comprising the unique identification playing device is realized Video Controller and playing device are bound, and add the second identifying code of the information of the condition code that comprises the unique identification playing device in vedio data stream, Video Controller can judge whether the second identifying code and the first identifying code that receive mate.So, for illegal user, change the view data of the playing device broadcast of not binding, the processing of interception can correctly be identified and make to the Video Controller end, illegal video image can be shown on LED display, promoted the security performance that LED display is play, solved well present LED display control field and play the problem of security.
By the detailed description below with reference to accompanying drawing, it is obvious that other side of the present invention and feature become.But should be known in the only purpose design for explaining of this accompanying drawing, rather than as the restriction of scope of the present invention, this is because it should be with reference to additional claim.Should also be appreciated that, unless otherwise noted, the unnecessary accompanying drawing of drawing to scale, they only try hard to illustrate conceptually structure described herein and flow process.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the configuration diagram of a kind of LED display control system of adopting of the safe player method of the LED display of the embodiment of the present invention.
Fig. 2 is a kind of high-level schematic functional block diagram of Video Controller shown in Figure 1.
Fig. 3 is the flow chart of steps of the safe player method of LED display of first embodiment of the invention.
Fig. 4 is the flow chart of steps of the safe player method of LED display of second embodiment of the invention.
Embodiment
, for above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the configuration diagram of a kind of LED display control system of adopting of the safe player method of the LED display of the embodiment of the present invention.As shown in Figure 1, the applicable LED display control system 10 of the safe player method of LED display of the present invention comprises playing device 11, Video Controller 13 and LED display 15.
Particularly, playing device 11 is connected to video interface 132 and the communication interface 134 of Video Controller 13.At this, playing device 11 is for example computing machine, and perhaps other can mounting software carry out media play and can realize the electronic installation that Video Controller 13 is controlled, and following examples will be used computing machine describing for example as playing device 11.Be provided with a plurality of Peripheral Interfaces on playing device 11, so that with Video Controller 11, carry out the mutual of data and instruction.
The video interface 132 of Video Controller 134 is for example VGA (Video Graphics Array, Video Graphics Array) interface, DVI interface (Digital Visual Interface, digital visual interface), HDMI interface (High Definition Multimedia Interface, high-definition media interface), SDI interface (Serial Digital Interface, digital serial interface) or DP (DisplayPort) but the interface of the transmit image data such as interface.Communication interface 134 is for example USB interface, RS232 or RS485 serial ports or network interface.See also Fig. 2, it is the high-level schematic functional block diagram of the Video Controller 13 of the embodiment of the present invention.In Fig. 2, Video Controller 13 is except comprising above-mentioned video interface 132 and communication interface 134, also comprise authentication module 136 and display control module 138, its concrete function will be elaborated at the safe player method of the LED display of the follow-up cooperation embodiment of the present invention.
LED display 15 is connected to the output interface (not showing in Fig. 1 and Fig. 2) of Video Controller 13, and the output interface of Video Controller 13 is for example optical fiber interface or network interface (for example RJ45 interface).When this output interface adopts optical fiber interface with the transmission as long range image data stream, usually can add an optical fiber interface between Video Controller 13 and LED display 15 and turn the photoelectric commutator of network interface.LED display 15 generally includes a plurality of LED casings that are stitched together, and each LED cabinet configuration has receiving card and is electrically connected to a plurality of LED lamp plates of receiving card, and even these a plurality of LED lamp plates are to form and be electrically connected to receiving card by adapter; Receiving card in the LED casing also claims the LED display control panel, and it obtains the view data of the LED lamp plate of to one's name controlling and deliver to the LED lamp plate from Video Controller 13 and shows.
[the first embodiment]
Describe below in conjunction with Fig. 1, Fig. 2 and Fig. 3 the safe player method of a kind of LED display that first embodiment of the invention provides in detail.Wherein, Fig. 3 is the flow chart of steps of the safe player method of a kind of LED display.As shown in Figure 3, the safe player method of the LED display of the present embodiment is suitable for being applied in LED display control system 10 shown in Figure 1, and it comprises the following steps 300 to step 380.
Step 300: the condition code that transmits unique identification playing device 11 to the communication interface 134 of Video Controller 13., to the communication interface 134 transmission condition codes of Video Controller 13, can be carried out by playing device 11, can be also that other equipment are carried out herein; The condition code of unique identification playing device 11 is as the first identifying code; And condition code is sent to communication interface 134 in the mode of steering order, for example with the parameter of condition code as steering order.In addition, the condition code of unique identification playing device 11 is for example physical network card MAC Address, physical hard disk sequence number, CPU sequence number, mainboard BOIS sequence number or its combination of playing device 11, the identity that these condition codes can unique identification playing device 11.Be understandable that, the condition code of unique identification playing device 11 can be also the artificial condition code that arranges of the validated user of playing device 11, as long as can unique identification playing device 11.In addition, Video Controller 13 obtains to store the use of preparing against subsequent authentication after the first identifying code from its communication interface 134.
Step 320: playing device 11 transmits the image data stream of the condition code that carries unique identification playing device 11 to the video interface 132 of Video Controller 13.At this, condition code entrained in image data stream is as the second identifying code.Be understandable that, carry the image data stream of the second identifying code in transmission before, also the second identifying code should be added in the image data stream that tendency to develop send.[interpolation] herein can adopt various ways to realize: mode one, the second identifying code is packed into the image data stream that tendency to develop is sent, Video Controller 13 for example the second identifying code is placed on data sequence head or data group head or other assigned addresses, as long as can parse; Mode two, replace engineering noise view data in the image data stream that tendency to develop send with the second identifying code, for example the resolution corresponding to image data stream of playing device 11 transmission is 1024*768, and the display resolution of LED display 15 for example only has 700*600, the data outside 700*600 are engineering noise view data described herein, even these engineering noise view data can be not shown by LED display 15 under the situation that is not replaced yet, even therefore by the second identifying code, replaced and can not affect final display screen display quality yet.
Step 340: after Video Controller 13 obtains to carry the image data stream of condition code from video interface 132, parsed the condition code of carrying in image data stream by authentication module 136, and whether the judgement condition code that parses and the condition code that obtains from communication interface 134 and store mate.
Step 360: if authentication module 136 judgment result is that coupling, by display control module 138, the view data in image data stream is sent to LED display 15 and shows.
Step 380: if judgment result is that of authentication module 136 do not mated, 138 pairs of image data streams of display control module carry out intercept process, also namely do not deliver to LED display 15 and show.The safety that so far, can realize LED display 15 is play.
[the second embodiment]
Describe below in conjunction with Fig. 1, Fig. 2 and Fig. 4 the safe player method of a kind of LED display that second embodiment of the invention provides in detail.Wherein, Fig. 4 is the flow chart of steps of the safe player method of another kind of LED display.As shown in Figure 4, the safe player method of the LED display of the present embodiment is suitable for being applied in LED display control system 10 shown in Figure 1, and it comprises the following steps 400 to step 480.
Step 400: the condition code from unique identification playing device 11 to the communication interface 134 of Video Controller 13 and the random code that transmit.Random code herein is to be generated by playing device 11, and it is time dependent, is for example to generate different random codes at interval of the certain hour section; Condition code herein and random code are as the first identifying code; And condition code and random code can be to be sent to communication interface 134 in the steering order mode respectively, for example with condition code and random code respectively as the parameter of steering order.In addition, the condition code of unique identification playing device 11 is for example physical network card MAC Address, physical hard disk sequence number, CPU sequence number, mainboard BOIS sequence number or its combination of playing device 11, or even the artificial feature that arranges of validated user; These condition codes can unique identification playing device 11 identity.In addition, Video Controller 13 obtains to store the use of preparing against subsequent authentication after the first identifying code (comprising condition code and random code) from its communication interface 134.
Step 420: playing device 11 transmits the image data stream of the information of the condition code that carries unique identification playing device 11 and random code to the video interface 132 of Video Controller 13.At this, playing device 11 after obtaining condition code and random code, can first carry out cryptographic calculation to generate the second identifying code, so the second identifying code herein comprises the information of above-mentioned condition code and random code.In addition, be understandable that, carry the image data stream of the second identifying code in transmission before, also the second identifying code should be added in the image data stream that tendency to develop send.[interpolation] herein can adopt various ways to realize: mode one, the second identifying code is packed into the image data stream that tendency to develop is sent, Video Controller 13 for example the second identifying code is placed on data sequence head or data group head or other assigned addresses, as long as can parse; Mode two, replace engineering noise view data in the image data stream that tendency to develop send with the second identifying code, for example the resolution corresponding to image data stream of playing device 11 transmission is 1024*768, and the display resolution of LED display 15 for example only has 700*600, the data outside 700*600 are engineering noise view data described herein, even these engineering noise view data can be not shown by LED display 15 under the situation that is not replaced yet, even therefore by the second identifying code, replaced and can not affect final display quality.
Step 440: Video Controller 13 obtains to carry the image data stream of information of condition code and random code from video interface 132 after, by authentication module 136, parse the condition code of carrying in image data stream and the information of random code, also namely parse the second identifying code; In addition, condition code and the random code that also can comprise the first identifying code of above-mentioned storage are carried out the cryptographic calculation identical with playing device 11, judge afterwards whether the result after cryptographic calculation mates with the second identifying code that parses again.
Step 460: if authentication module 136 judgment result is that coupling, by display control module 138, the view data in image data stream is sent to LED display 15 and shows.
Step 480: if judgment result is that of authentication module 136 do not mated, 138 pairs of image data streams of display control module carry out intercept process, also namely do not deliver to LED display 15 and show.The safety that so far, can realize LED display 15 is play.
In addition, be understandable that, the random code in second embodiment of the invention also can replace to fixed code, and such as being the sequence that consists of the symbol such as digital, alphabetical, it can reach the purpose of safety broadcast equally.
In summary, the first identifying code of the information of the condition code of the above embodiment of the present invention by comprising the unique identification playing device is realized Video Controller and playing device are bound, and add the second identifying code of the information of the condition code that comprises the unique identification playing device in vedio data stream, Video Controller can judge whether the second identifying code and the first identifying code that receive mate.This shows, owing to carrying out between playing device and Video Controller in the streamed process of view data, increased proof procedure, change the view data of the playing device broadcast of not binding for illegal user, the Video Controller end can't be completed checking thereby can correctly identify and make the processing of interception, illegal video image can be shown on LED display, promoted the security performance that LED display is play, solved well present LED display control field and play the problem of security.
Applied specific case herein principle and the embodiment of the safe player method of LED display of the present invention and Video Controller are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (10)
1. safe player method of LED display, be applied to playing device, the Video Controller that is connected with described playing device and with LED display that described Video Controller is connected between, it is characterized in that, the safe player method of described LED display comprises step:
Communication interface to described Video Controller transmits the first identifying code, and described the first identifying code comprises the information of the condition code of the described playing device of unique identification;
Described playing device transmits to the video interface of described Video Controller the image data stream that carries the second identifying code, and described the second identifying code comprises the information of the condition code of the described playing device of unique identification; And
Described Video Controller parses described the second identifying code that carries in described image data stream, and whether judgement described the second identifying code that parses and described the first identifying code that obtains from described communication interface mate, if coupling, described Video Controller is sent to described LED display with the view data in described image data stream and shows.
2. the safe player method of LED display as claimed in claim 1, it is characterized in that, the condition code of the described playing device of described unique identification is the physical network card MAC Address of described playing device, physical hard disk sequence number, CPU sequence number, mainboard BOIS sequence number or its combination.
3. the safe player method of LED display as claimed in claim 1, is characterized in that, described video interface is VGA interface, DVI interface, HDMI interface, SDI interface or DP interface.
4. the safe player method of LED display as claimed in claim 1, it is characterized in that, fixed code or the random code that is provided by described playing device more is provided described the first identifying code, correspondingly described the second identifying code is generated by cryptographic calculation by described condition code and described fixed code or random code, and described judgement described the second identifying code that parses and the step whether described the first identifying code that obtains from described communication interface mates comprise:
Described Video Controller gets from described communication interface the condition code that the first identifying code is comprised after described the first identifying code and carries out the cryptographic calculation identical with described playing device with fixed code or random code; And
Result and described second identifying code that parse of described Video Controller after with described cryptographic calculation compares to realize judging whether described the second identifying code that parses and described the first identifying code that obtains from described communication interface mate.
5. the safe player method of LED display as claimed in claim 4, is characterized in that, the condition code that described the first identifying code comprises and fixed code or random code are sent to respectively the communication interface of described Video Controller with the parametric form of steering order.
6. the safe player method of LED display as claimed in claim 1, is characterized in that, before described playing device transmits the step of image data stream to the video interface of described Video Controller, also comprises:
Described the second identifying code is added in the image data stream that tendency to develop send.
7. the safe player method of LED display as claimed in claim 6, is characterized in that, the step that described the second identifying code is added in the image data stream that tendency to develop send comprises:
Described the second identifying code is packed into the image data stream that tendency to develop is sent.
8. the safe player method of LED display as claimed in claim 6, is characterized in that, the step that described the second identifying code is added in the image data stream that tendency to develop send comprises:
Replace engineering noise view data in the image data stream that tendency to develop send with described the second identifying code, the view data of described engineering noise image definition data for also not shown by described LED display under the situation that is not replaced.
9. a Video Controller, be suitable for connecting playing device and LED display, it is characterized in that, described Video Controller comprises:
Communication interface, for the first identifying code that receives described playing device, described the first identifying code comprises the information of the condition code of the described playing device of unique identification;
Video interface, be used for receiving the image data stream that carries the second identifying code that described playing device transmits, and described the second identifying code comprises the information of the condition code of the described playing device of unique identification;
Authentication module, be used for parsing described the second identifying code that described image data stream carries, and whether judgement described the second identifying code that parses and described the first identifying code that obtains from described communication interface mate; And
Display control module, be used for the view data in described image data stream being sent to described LED display showing when judging described the second identifying code and described the first identifying code for coupling.
10. Video Controller as claimed in claim 9, it is characterized in that, described the first identifying code also comprises fixed code or the random code that described playing device provides, thereby described authentication module comprises in judgement described the second identifying code that parses and the process whether described the first identifying code that obtains from described communication interface mates:
The cryptographic calculation that the described condition code of described playing device and described fixed code or random code are carried out appointment; And
The result of described cryptographic calculation and described the second identifying code that parses are compared to realize judging whether described the second identifying code and described the first identifying code mate.
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| CN109427288A (en) * | 2017-08-31 | 2019-03-05 | 西安诺瓦电子科技有限公司 | Displaying screen controller, display control program and method |
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| CN113099268A (en) * | 2019-12-23 | 2021-07-09 | 浙江宇视科技有限公司 | LED display screen video playing method, device, equipment and storage medium |
| CN113407025A (en) * | 2021-05-27 | 2021-09-17 | 广东职业技术学院 | Information display method and system |
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| CN103389889B (en) | 2015-11-25 |
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