CN217935773U - LED transmitting card - Google Patents

Abstract

The utility model provides a LED sends the card, include: an HDMI decoding unit including an HDMI input interface; the video processing unit is connected with the HDMI decoding unit and is used for carrying out image processing on the video decoding sent by the HDMI decoding unit; the processor is respectively connected with the HDMI decoding unit and the video processing unit, and is used for receiving the CEC decoding sent by the HDMI decoding unit; the utility model discloses a LED card of sending decodes CEC control signal and carries out and has realized the integration to HDMICEC control function through HDMI decoding unit and treater, and it is right only just to have accomplished through the HDMI cable for the user the utility model discloses a control of LED card of sending has solved prior art's card of sending and has need additionally set up the control line, the complicated problem of LED large-screen display system wiring.

Description

LED transmitting card

Technical Field

The utility model relates to a LED shows technical field, especially relates to a LED sends the card.

Background

The LED sending card is an indispensable hardware device in the whole LED large-screen display system and mainly used for carrying out image processing on video data transmitted from the upstream and then sending the video data to the downstream LED scanning board; another important function of the sending card is to serve as a central link of "control command communication", which is responsible for receiving, processing or forwarding control commands from the user set on the host computer, such as adjusting the brightness and color temperature of the LED large screen, and the layout parameters of the sending card, etc. The operation setting of the user software on the upper computer can be connected and communicated with the sending card through a hundred mega/kilomega Lan network cable or a serial port cable.

However, the above-mentioned common control command communication method brings extra control line overhead, and the computer not only needs to connect the HDMI cable to the sending card, but also needs to connect 1 network cable or serial port cable to the sending card; when a computer needs to control a plurality of sending cards, a network switch or more serial port lines need to be used, so that the project cost is increased, and the field wiring is complicated and disordered.

The HDMI CEC (Consumer Electronics Control) enables the HDMI cable to transmit not only audio and video data but also Control commands of a user, i.e., the audio and video data and the Control data are integrated in one HDMI cable, so that the trouble of multi-line connection of the user can be avoided. The CEC function is originally widely applied to cascade control of consumer multimedia products such as Televisions (TVs), set-top boxes, video players and the like, with the increasing adoption of HDMI as an input source for LED large screens, how to integrate the HDMI CEC control function in a transmitting card, a user can complete video and control data transmission to the transmitting card only by using 1 HDMI cable, extra control line connection overhead is solved, wiring complexity of an LED large screen display system is reduced, and the technical problem to be solved urgently at present is solved.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the to-be-solved technical problem of the present invention is to provide a LED transmitting card, which needs to additionally set a control line and the complicated wiring problem of the LED large screen display system.

In order to solve the technical problem, the utility model provides a LED transmitting card, include:

an HDMI decoding unit including an HDMI input interface;

the video processing unit is connected with the HDMI decoding unit and is used for processing video decoding sent by the HDMI decoding unit;

and the processor is respectively connected with the HDMI decoding unit and the video processing unit, and is used for receiving the CEC decoding sent by the HDMI decoding unit.

Preferably, the LED transmitting card further includes a memory unit connected to the video processing unit, and the video processing unit writes the processed video information into the memory unit.

Preferably, the LED transmitting card further comprises an audio output unit, and the audio output unit is connected to the HDMI decoding unit and is configured to decode and output the audio sent by the HDMI decoding unit.

Preferably, the LED transmitting card further comprises an LED network output unit, and the LED network output unit is connected to the video processing unit and is configured to convert the digital signal processed by the video processing unit into a network signal for transmission.

Preferably, the HDMI decoding unit further includes an HDMI ring-out interface, and the HDMI ring-out interface outputs the original HDMI signal to other multimedia devices, so that other LED transmitting cards or other media devices supporting the CEC function can be connected through an HDMI cable, thereby implementing cascade control of multiple devices.

Preferably, the LED transmitting card further comprises a debugging control unit for debugging by a developer or a user.

Preferably, the LED transmitting card further includes a relay unit for controlling the power supply.

Preferably, the HDMI decoding unit includes more than two HDMI input interfaces for satisfying the user's requirement of flexibly selecting the HDMI signal source.

Preferably, the video processing unit is an FPGA (Field-Programmable Gate Array) Programmable unit, which has the advantage of concurrent processing of data because signals and register transmission are controlled by a clock, and when image processing is performed, multiple image algorithms are parallel to each other, so that efficiency can be improved, and meanwhile, a built-in buffer unit can buffer and reprocess line data of an image when image processing is performed, so that processing efficiency can be improved.

Preferably, the treater adopts MCU (Microcontroller Unit, singlechip) embedded Unit, can select different MCU in a flexible way according to the information volume size and the complexity of required processing, guarantees simultaneously at the extravagant performance the utility model discloses a LED sends the card steady operation.

As described above, the utility model discloses a LED sends the card, has following beneficial effect: the utility model provides a set of hardware equipment of LED transmitting card, LED transmitting card is when using, through HDMI input interface connection HDMI signal source to utilize HDMI decoding unit to become video decoding and CEC decoding with HDMI signal processing, then video processing unit further carries out operations such as zooming, tailorring, cutting apart, concatenation to the video decoding, the treater reads the CEC and decodes; the utility model discloses a LED card of sending decodes CEC control signal through HDMI decoding unit and treater, supplies to carry out and has realized the integration to HDMI CEC control function, and it is right only just to have accomplished through the HDMI cable to supply the user the utility model discloses a control of LED card of sending has solved prior art's card of sending and has need additionally to set up the control line, the complicated problem of LED large-screen display system wiring.

Drawings

Fig. 1 is a schematic structural view of an LED transmitting card according to the present invention;

fig. 2 is a schematic structural diagram of an HDMI decoding unit of the LED transmitting card according to the present invention;

fig. 3 is a schematic structural diagram of a video processing unit of the LED transmitting card of the present invention;

fig. 4 is a schematic structural diagram of the LED network transmission module of the LED transmission card of the present invention.

Description of the element reference numerals

1 HDMI decoding unit

11 HDMI channel selection module

12. Audio decoding module

13. Video decoding module

14 CEC decoding module

2. Processor with a memory having a plurality of memory cells

3. Video processing unit

31 HDMI image data acquisition module

32. Image scaling module

33 3D video source processing module

34. Memory management module

35 LED network sending module

351. Synchronous frame transmission

352. Control frame transmission

353. Data frame transmission

354. Frame type selective forwarding

36. Control frame network packet switching center

37 Lan debugging network port sending module

38. Processor communication control module

4. Memory cell

5 LED network output unit

6. Debugging control unit

7. Relay unit

8. Audio output unit

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

As shown in the figure, the utility model provides a LED sends the card, include:

an HDMI decoding unit 1, the HDMI decoding unit 1 including an HDMI input interface;

the video processing unit 3 is connected with the HDMI decoding unit 1 and is used for processing the video decoding sent by the HDMI decoding unit 1;

and the processor 2, the processor 2 is respectively connected with the HDMI decoding unit 1 and the video processing unit 3, wherein the processor 2 is used for receiving the CEC decoding sent by the HDMI decoding unit 1.

The utility model provides a LED send the card when using, through HDMI input interface connection HDMI signal source to utilize HDMI decoding unit 1 to become the video decoding with HDMI signal processing and decode with the CEC, video processing unit 3 further decodes the video and zooms, tailors, cuts apart, operation such as concatenation, and processor 2 reads the CEC and decodes.

It should be noted that the present invention provides an LED transmitting card, which is a set of hardware devices, and the HDMI decoding unit 1, the processor 2, and the video processing unit 3 included in the LED transmitting card are all hardware components. The LED transmitter card may be used alone or in combination with some program or software. For example, when the LED sending card in the present embodiment is combined with some programs or software, the following can be implemented:

and (3) decision processing of the CEC instruction: the processor 2, upon receiving the CEC decoding, executes according to the content of the CEC decoding, and in this embodiment, the user CEC command includes: LED display screen dormancy, LED display screen awakening, LED display screen brightness adjustment, LED display screen color temperature adjustment, audio output volume adjustment, HDMI video input source selection, sending card video processing mode switching and the like;

firmware upgrade of the video processing unit 3 and the processor 2;

program loading of the video processing unit 3: loading the relevant program to the video processing unit 3 through the processor 2;

data analysis of the network packet: after receiving the network packet, the video processing unit 3 transmits the network packet to the processor 2, and the processor 2 is responsible for analyzing the network data and executing corresponding processing;

debugging a serial port: the processor 2 is communicated with an external computer to acquire some state information of the current sending card;

local storage of parameters and logs: some settings of the user, such as the brightness of the LED on the large screen set by the user last time, the layout parameters set by the user last time, and the like, and the running states of the DC input voltage, the ambient temperature, and the like, are recorded through the local flash memory.

In this embodiment, as shown in fig. 1 and fig. 2, the HDMI decoding unit 1 includes two HDMI input interfaces for satisfying a user's requirement for flexibly selecting an HDMI signal source, and the HDMI decoding unit 1 further includes an HDMI channel selection module 11 and an HDMI ring-out interface, where the HDMI channel selection module 11 is configured to flexibly select two HDMI input interfaces, and an HDMI signal selected and completed by the HDMI channel selection module 11 is output to other multimedia devices through the HDMI ring-out interface, so that other LED transmitter cards or other media devices supporting CEC can be connected through an HDMI cable, thereby implementing cascade control of multiple devices, and meanwhile, whether an LED transmitter card fails or not can be determined according to whether an HDMI signal that is looped out is abnormal, so as to implement fast troubleshooting; further, the HDMI decoding unit 1 further includes an audio decoding module 12, a video decoding module 13, and a CEC decoding module 14, respectively configured to decode the HDMI signal into an audio decoding, a video decoding, and a CEC decoding; as shown in fig. 1, the LED transmitting card further includes an audio output unit 8, where the audio output unit 8 is connected to the HDMI decoding unit 1, and is configured to decode and output the audio sent by the HDMI decoding unit 1 to an audio playing device matched with the LED screen and play the audio; further, in the embodiment, as shown in fig. 2, the audio decoding is transmitted through an IIS (Integrated Inter chip Sound) protocol, the video decoding is transmitted to the video processing unit 3 through an LVTTL level standard, and the CEC decoding is communicated with the processor 2 through an IIC (Inter-Integrated Circuit) bus.

In this embodiment, as shown in fig. 1, the LED sending card further includes a debugging control unit 6 for debugging by a developer or a user; the debugging control unit 6 is connected with the video processing unit 3 through a Lan port and connected with the processor 2 through a serial port.

In the present embodiment, as shown in fig. 1, the video data processed by the video processing unit 3 is converted into a network packet via the LED network output unit 5 and transmitted to the downstream LED receiving card.

In this embodiment, as shown in fig. 3, the video processing unit 3 employs an FPGA (Field-Programmable Gate Array) Programmable unit, which has the advantage of concurrent data processing because signals and register transmission are controlled by a clock, and when image processing is performed, multiple image algorithms are parallel to each other, so that efficiency can be improved, and meanwhile, a built-in buffer unit can buffer and reprocess line data of an image when image processing is performed, so that processing efficiency can be improved; specifically, in this embodiment, the FPGA programmable unit includes functional modules such as an HDMI image data acquisition module 31, an image scaling module 32, a 3D video source processing module 33, a memory management module 34, a control frame network packet switching center 36, a processor communication control module 38, an LED network transmission module 35, and a Lan debug network interface transmission module 37, wherein, the video decoded by the HDMI decoding unit 1 is transmitted to the HDMI image data acquisition module 31 for further processing, the HDMI image data acquisition module 31 acquires video data according to the clock edge, dynamically adjusts the time sequence relation between the clock signal and the video data to meet the requirement that the clock can acquire accurate video data, meanwhile, the collected video data is converted into a 2-pixel parallel mode to reduce the clock frequency in the FPGA programmable unit and increase the working stability of the FPGA programmable unit, the video data is then reprocessed by the image scaling module 32 and the 3D video source processing module 33 respectively to adapt to the subsequent LED screen playback, after the video data is processed, the video data is written into the memory unit 4 through the memory management module 34, the video data of the memory unit 4 is read through the memory management module 34 by the LED network transmitting module 35, and the video data is transmitted to the LED network output unit 5, further, in this embodiment, the memory unit 4 may adopt a DDR (Double Data Rate), the FPGA programmable unit is connected to the DDR through a DDR Data bus, in this embodiment, the FPGA programmable unit may also be connected to a Flash memory through an SPI (serial peripheral interface) interface, and to a storage device such as a read only memory through an integrated circuit bus; further, in this embodiment, the Lan debug port transmitting module 37 is connected to the debug control unit 6, the control frame network packet switching center performs the communication between the upstream computer, the LED transmitting card and the downstream LED receiving card, signals sent from the Lan debug port transmitting module 37, the upstream HDMI signal source and the downstream LED receiving card are transmitted to the processor 2 through the control frame network packet switching center by the processor communication control module 38 by using the SPI communication interface, and signals sent from the processor 2 are distributed to the upstream computer, the LED transmitting card and the downstream LED receiving card through the control frame network packet switching center; still further, as shown in fig. 4, the LED network transmitting module 35 includes a data frame transmitting 353, a control frame transmitting 352, a synchronization frame transmitting 351 and a frame type selecting forwarding 354, where the data frame transmitting 353, the control frame transmitting 352 and the synchronization frame transmitting 351 respectively correspond to generate 3 types of network data packets designed to exist in the data transmission process, and are respectively a data frame, a synchronization frame and a control frame, where the data frame includes specific image data information acquired from the memory management module 34, the synchronization frame is used to tell a downstream receiving card, the next transmitted display data is a new frame image, the control frame includes control information related to adjusting and controlling brightness, color temperature and system upgrade of the LED display screen, and the frame type selecting forwarding 354 controls the transmitting rule of the data frame, the synchronization frame and the control frame, and the highest priority is the synchronization frame transmitting 351, the next data frame transmitting 353 and finally the control frame transmitting 352; if synchronous frame, display data frame and control frame need to be sent, the synchronous frame is sent first, and the display data frame and control frame are buffered in respective SRAM memory, until the synchronous frame is sent out, the following data frame and control frame can be started; more specifically, in this embodiment, the video processing unit 3 may adopt Artix7 XC7a35T or Artix7 XC7a100T.

In this embodiment, as shown in fig. 1, the LED transmitting card further includes a relay unit 7 connected to the processor 2 for power management operation of the LED large screen and other control cards.

In this embodiment, treater 2 adopts MCU (Microcontroller Unit, singlechip) embedded Unit, can select different MCU in a flexible way according to the information volume size and the complexity of required processing, guarantees simultaneously at the performance of not wasting the utility model discloses a LED sends the card steady operation.

It should be emphasized once more that the present invention provides a LED transmitting card which is a hardware device, the present invention does not relate to the updating of software technology, and any software technology is not in the protection scope of the present invention.

To sum up, the utility model discloses a LED card of sending decodes unit 1 and treater 2 through HDMI and decodes and carry out the integration that has realized HDMI CEC control function to CEC control signal, and it is right just to accomplish through the HDMI cable just to supply the user the utility model discloses a control of LED card of sending has solved prior art's card of sending and has need additionally set up the control line, the complicated problem of LED large-screen display system wiring. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. An LED transmitter card, comprising:

an HDMI decoding unit (1), said HDMI decoding unit (1) comprising an HDMI input interface;

the video processing unit (3) is connected with the HDMI decoding unit (1) and is used for processing video decoding sent by the HDMI decoding unit (1);

and the processor (2), the processor (2) is respectively connected with the HDMI decoding unit (1) and the video processing unit (3), wherein the processor (2) is used for receiving the CEC decoding sent by the HDMI decoding unit (1).

2. The LED transmitter card of claim 1, wherein: the LED transmitting card also comprises a memory unit (4) connected with the video processing unit (3).

3. The LED transmitter card of claim 1, wherein: the LED transmitting card further comprises an audio output unit (8), wherein the audio output unit (8) is connected with the HDMI decoding unit (1) and used for decoding and outputting the audio emitted by the HDMI decoding unit (1).

4. The LED transmitter card of claim 1, wherein: the LED transmitting card further comprises an LED network output unit (5), wherein the LED network output unit (5) is connected with the video processing unit (3) and used for converting the digital signals processed by the video processing unit (3) into network signals to be sent out.

5. The LED transmitter card of claim 1, wherein: the HDMI decoding unit (1) further comprises an HDMI loop-out interface.

6. The LED transmitter card of claim 1, wherein: the LED transmitting card also comprises a debugging control unit (6).

7. The LED transmitter card of claim 1, wherein: the LED transmitting card further comprises a relay unit (7).

8. The LED transmitter card of claim 1, wherein: the HDMI decoding unit (1) includes two or more HDMI input interfaces.

9. The LED transmitter card of claim 1, wherein: the video processing unit (3) adopts an FPGA programmable unit.

10. The LED transmitter card of claim 1, wherein: the processor (2) adopts an MCU embedded unit.

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