CN103903568B - LED display control card - Google Patents
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Abstract
The present invention relates to a kind of LED display control card, comprise video signal input interface, audio input interface, video processor chip and programmable logic device.Video processor chip electrical connection video signal input interface and audio input interface, for the vision signal of process input and audio signal with output digital video data and digital audio-frequency data respectively to programmable logic device.In addition, programmable logic device is used for carrying out data processing for output to digital of digital video data and digital audio-frequency data.The present invention by setting up video processor chip on LED display control card, the video utilizing video processor chip built-in and image processing function and audio frequency processing capacity, can solve the defects such as traditional sending card input interface is single, image processing function is few and not support the problem that audio frequency sends.
Description
Technical field
The present invention relates to display control technology field, particularly a kind of LED display control card.
Background technology
In existing LED display control system, LED display is normally spliced by multiple LED box, and each LED box is spliced by multiple LED lamp panel.Each LED box is also configured with receiving card, receiving card by winding displacement output image drive singal to LED lamp panel thus driving LED lamp plate display.Each LED display control system is equipped with sending card, and based on specific host-host protocol, the video source of input is sent to receiving card with fixing data format by sending card, and the video source of input is intactly presented on LED display by receiving card.
As shown in Figure 1, traditional sending card 10 adopts decoding chip 11 such as TFP401 or ADV7612 the DVI video source signal from computer or video processing equipment to be converted to parallel TTL format video data signal to complete the conversion of Data Transport Protocol to provide high-resolution vedio data to FPGA13 usually, in conjunction with dynamic random access memory 15, the packing that certain image procossing and logic control realize view data is carried out to the view data received by FPGA13, and procotol is realized in FPGA13 inside after packing completes, the Internet Transmission of vedio data is completed eventually through network PHY chip 17.
But, there is following shortcoming in traditional sending card: (1) input interface is single: the DVI format video source images that sending card generally adopts single DVI interface to export from the headend equipment such as computer or video processor, completes the reception of data.This just requires that headend equipment must possess DVI interface, otherwise cannot complete transmission and the reception of view data.Its image resolution ratio supported is single simultaneously, if headend equipment image output bandwidth is inadequate or disposal ability is limited, then can cause the image resolution ratio of input and the unmatched situation of rear end receiving card, cause picture quality situation that is low or that at all cannot normally work.(2) image processing function is few: general sending card only can carry out simple gamma (Gamma), colour temperature adjustment etc. to the image of input, the video source modeling processing capacities such as such as color enhancement, de interlacing, colour of skin compensation cannot be realized, more cannot realize video processing function and the high performance image intelligent convergent-divergents such as picture-in-picture (PIP), picture and text superposition, multichannel seamless switching, function singleness.
Summary of the invention
Therefore, for solving technological deficiency and the deficiency of prior art existence, the present invention proposes a kind of LED display control card with video and image processing function.
Particularly, a kind of LED display control card that the embodiment of the present invention proposes, comprises video signal input interface audio input interface, video processor chip and programmable logic device.Wherein, video processor chip is electrically connected described video signal input interface and audio input interface, for process input vision signal with output digital video data to described programmable logic device and for the treatment of the audio signal of input with outputting digital audio data to described programmable logic device.In addition, described programmable logic device is used for carrying out data processing for output to described digital of digital video data and digital audio-frequency data.
As from the foregoing, the embodiment of the present invention by setting up video processor chip on LED display control card, utilize the video of video processor chip and image processing function and audio frequency processing capacity, can receive and process vision signal (such as digital video signal, analog video signal) and audio signal, thus the input interface of LED display control card can be enriched and increase the image-capable of LED display control card.In addition, video processor chip output digital video data are such as sent to programmable logic device with TTL form or LVDS form, can save prior art Computer or video processing equipment end and TTL format signal be converted to the signal format conversion operations back and forth that DVI signal is converted to TTL form by DVI form and traditional sending card end.In addition, the built-in audio processing capacity of video processor chip also can solve traditional sending card and not support the problem that audio frequency sends.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is a kind of module diagram of traditional sending card.
Fig. 2 is the module diagram of the LED display control card of one embodiment of the invention.
Fig. 3 is the module diagram of the LED display control card of another embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Refer to Fig. 2, it is the module diagram of the LED display control card of one embodiment of the invention.As shown in Figure 2, LED display control card 20 such as sending card is suitable for being connected to by netting twine the LED display being configured with receiving card; At this, LED display can be monochromatic screen, double-colored screen or full-color screen, and it such as comprises a LED box or multiple LED box be stitched together, and single led casing can comprise one or more LED lamp panel and usually be configured with receiving card.
Hold above-mentioned, LED display control card 20 comprises: video processor chip 23, programmable logic device 25, network transmission module 27, multiple network interface 29, multiple video signal input interface such as digital video signal input interface 212 of electrical connection video processor chip 23, analog video signal input interface 214 and digital audio-video signal Mixed design interface 216, the audio input interface 218 of electrical connection video processor chip 23, dynamic random access memory 222, flash memory 224, UART interface 242, keyboard interface 262 and LCD MODULE control interface 264, and the dynamic random access memory 282 of electrical connection programmable logic device 25.In addition, programmable logic device 25 is electrically connected with video processor chip 23, and network output module 27 is electrically connected programmable logic device 25, and described multiple network interface 29 is electrically connected network transmission module 27.It should be noted that, the video signal input interface of the present embodiment and the quantity of audio input interface do not limit, and it is determined according to the needs of practical application.
In the present embodiment, video processor chip 23 such as comprises video and image processing module 231 and audio processing modules 233, and video and image processing module 231 such as comprise Faroudja image processing engine.Digital video signal input interface 212 is such as DVI (DigitalVisualInterface) interface, 30BitTTL etc., analog video signal input interface 214 is such as VGA (VideoGraphicsArray, video graphics array) interface, S terminal (S-Video) interface, component video interface, the video interfaces such as composite video interface or its combination in any, digital audio-video signal Mixed design interface 216 is such as HDMI (HighDefinitionMultimediaInterface, HDMI (High Definition Multimedia Interface)) interface, DP (Displayport) interface, SDI (SerialDigitalInterface, digital component serial line interface) audio-video interface or its combination in any such as interface, audio input interface 218 is such as digital audio and video signals input interface, simulated audio signal input interface, or its combination.Wherein, digital audio and video signals input interface is such as I2S (Inter-ICSoundBus) form serial audio frequency data interface, SPDIF (Sony/PhilipsDigitalInterface) format audio interface etc., and simulated audio signal input interface is such as left/right channel audio interface (AudioL/R) etc.Programmable logic device 25 is such as FPGA (FieldProgrammableGateArray, field programmable gate array) etc. programming device, network transmission module 27 such as comprises network PHY (PhysicalLayer, physical layer) chip, the quantity of network interface 29 is at least one, such as, shown in Fig. 2 four.
Video processor chip 23 can complete the reception of multiple analog, digital video signal and audio signal as dynamic random access memory 222 and flash memory 224 in conjunction with external memory storage, the color processing capacities such as brightness, colourity, saturation, gamma (Gamma) adjustment, colour of skin compensation, color enhancement can be completed to the video image of outside input by the Faroudja image processing engine in the video of inside and image processing module 231, and realize the video source modeling processing capacities such as image de interlacing, stepless zooming and the image co-registration function such as PIP, picture and text superposition.Vedio data after process is sent to programmable logic device 25 with parallel TTL form, and the procotol completing video data in conjunction with dynamic random access memory 282 by programmable logic device 25 is changed and data packing.In addition, after the outside audio signal inputted can be passed through inner audio processing modules 233 process, be sent to programmable logic device 25 by digital audio format such as I2S form, completed the packing of voice data by programmable logic device 25, and be synchronously inserted in vedio data stream; Final data realize the Internet Transmission of video, audio frequency by network transmission module 27 and network interface 29.It is worth mentioning that, vedio data after the present embodiment process is not limited to be sent to programmable logic device 25 with parallel TTL form, also extended formatting can be adopted, less and the LVDS (LowVoltageDifferentialSignaling that antijamming capability is stronger of the data wire such as needed, Low Voltage Differential Signal) form, need to do suitable format conversion after just programmable logic device 25 receives LVDS format video view data.
UART interface 242 is for completing the cascade between multiple same model LED display control card 20, thus user to certain LED display control card 20 arrange action/parameter configuration can synchronous transmission to next stage LED display control card 20, the parameters such as such as passage bridge, unlatching PIP, adjustment output resolution ratio, realize the synchronous tiled function of multiple LED display control card 20, the rotating band completing larger resolution LED display carries.
Keyboard interface 262 and LCD MODULE control interface 264 can distinguish external matrix formula keyboard (keypad) and Lattice graphics LCD module, so conveniently can control and system status monitoring, such as, facilitate user to carry out input channel and switch fast and arrange with video processing function.At this, keyboard interface 262 is such as electrically connected to the ADC (AnalogtoDigitalConversion of video processor chip 23, analog-to-digital conversion) interface or I2C (Inter-ICBus) interface, LCD MODULE control interface 264 is such as electrically connected to the SPI interface (SerialPeripheralInterface, Serial Peripheral Interface (SPI)) or 8 parallel-by-bit digital interfaces etc. of video processor chip 23.
Refer to Fig. 3, it is the module diagram of the LED display control card of another embodiment of the present invention.As shown in Figure 3, the structure of LED display control card 30 is substantially identical with the structure of the LED display control card 20 shown in Fig. 2, difference is: use programmable logic device 25 as master controller, UART interface 242, keyboard interface 262 and LCD MODULE control interface 264 are not electrically connected to video processor chip 23 as shown in Figure 2, but be all electrically connected to programmable logic device 25, thus by the parameter configuration of programmable logic device 25 completion system, and the selection that video processor chip 23 completes input channel can be controlled, brightness, colourity, saturation, gamma adjusts, the colour of skin compensates, the color processing capacities such as color enhancement, and realize de interlacing, video source modeling processing capacity and the PIP such as stepless zooming, the image co-registration functions such as picture and text superposition.
It is worth mentioning that, earlier figures 2 and video processor chip 23 embodiment illustrated in fig. 3 can select model to be the chip of STDP8028, or adopt the video frequency processing chip of other types as replacements such as FLI32626.
From aforementioned Fig. 2 with embodiment illustrated in fig. 3ly can to learn, it is one or more that the LED display control card 20,30 of the embodiment of the present invention can have in following beneficial effect:
(1) abundant input interface: the video processor chip of the embodiment of the present invention such as can support the digital audio/video hybrid interfaces such as HDMI, DP and/or SDI, support the digital visual interfaces such as DVI, and the analog video interface such as VGA, S terminal, component vide and/or composite video, support digital audio interface and the AudioL/R analogue audio frequency input interfaces such as I2S and/or SPDIF simultaneously, and outside receiving chip can not be needed, facilitate circuit design;
(2) multiple image processing function: comprise the color processing capacities such as brightness, colourity, saturation, Gamma adjustment, colour of skin compensation, color enhancement, complete the video source modeling processing capacities such as image de interlacing, stepless zooming, and realize the image co-registration function such as PIP, picture and text superposition, greatly enrich the video processing function of LED display control card, improve the scope of application;
(3) the transmission problem of audio frequency is solved: the embodiment of the present invention can pass through the built-in audio processing modules of video processor chip, support the audio frequency input of the multiple formats such as I2S, SPDIF, analogue audio frequency, after inter-process and audio adjustment, such as pass through I2S bus transfer to programmable logic device, the packing realizing voice data sends, and solves the video, the asynchronous problem of audio frequency that exist under traditional sending card does not support the problem that audio frequency sends and asynchronous process situation.
(4) level of integrated system is high: solve the matching problem between headend equipment and sending card such as conventional video treatment facility, decrease equipment and connecting line quantity, facilitate field adjustable, improve Consumer's Experience.
In sum, apply specific case herein and set forth the principle of LED display control card of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, 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. a LED display control card, comprises video signal input interface and programmable logic device; It is characterized in that, described LED display control card also comprises:
Audio input interface;
Video processor chip, be electrically connected described video signal input interface and audio input interface, for process input vision signal with output digital video data to described programmable logic device and for the treatment of the audio signal of input with outputting digital audio data to described programmable logic device, wherein, described video processor chip exports the digital of digital video data of described programmable logic device to for parallel TTL format video data, described TTL format video data inputs to described programmable logic device without Signal form translate after described video processor chip exports,
Described programmable logic device; And
Network transmission module and network interface, described network transmission module comprises network PHY chip and is electrically connected described programmable logic device, and described network interface is electrically connected described network transmission module;
Wherein, described programmable logic device be used for described digital of digital video data and described digital audio-frequency data carry out data processing output network protocol data bag to described network transmission module, outwards send to be sent to described network interface by described network transmission module.
2. LED display control card as claimed in claim 1, it is characterized in that, described video signal input interface comprises: digital video signal input interface and analog video signal input interface, be electrically connected described video processor chip respectively.
3. LED display control card as claimed in claim 1 or 2, it is characterized in that, described video signal input interface comprises digital audio-video signal Mixed design interface, is electrically connected described video processor chip.
4. LED display control card as claimed in claim 3, it is characterized in that, described digital audio-video signal Mixed design interface comprises HDMI, DP interface or SDI interface, or the combination in any of HDMI, DP interface and SDI interface.
5. LED display control card as claimed in claim 1, it is characterized in that, described LED display control card also comprises:
Keyboard interface and LCD MODULE control interface, be electrically connected described video processor chip or described programmable logic device.
6. LED display control card as claimed in claim 1, it is characterized in that, described LED display control card also comprises:
UART interface, is electrically connected described video processor chip or described programmable logic device, for cascade LED display control card described in another.
7. LED display control card as claimed in claim 2, it is characterized in that, described digital video signal input interface comprises DVI interface.
8. LED display control card as claimed in claim 2, it is characterized in that, described analog video signal input interface comprises USB interface, S terminal interface, component video interface or composite video interface, or the combination in any of USB interface, S terminal interface, component video interface and composite video interface.
9. LED display control card as claimed in claim 1, it is characterized in that, described audio input interface comprises digital audio and video signals input interface and simulated audio signal input interface.
10. LED display control card as claimed in claim 1, it is characterized in that, the digital audio-frequency data that described video processor chip exports described programmable logic device to is I2S form serial audio data.
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| CN201410168285.XA CN103903568B (en) | 2014-04-24 | 2014-04-24 | LED display control card |
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| CN201410168285.XA CN103903568B (en) | 2014-04-24 | 2014-04-24 | LED display control card |
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| CN103903568B true CN103903568B (en) | 2016-01-06 |
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| CN106782294B (en) * | 2016-12-26 | 2019-03-26 | 西安诺瓦电子科技有限公司 | LED display control system |
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| CN112449220A (en) * | 2019-08-30 | 2021-03-05 | 西安诺瓦星云科技股份有限公司 | Video playing device and video playing system |
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| CN112951148B (en) * | 2019-12-09 | 2024-03-15 | 西安诺瓦星云科技股份有限公司 | Two-in-one multimedia playing box, display screen splicing configurator and spliced display system |
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