CN210781062U

CN210781062U - HDMI differential signal receiving converter based on rail transit

Info

Publication number: CN210781062U
Application number: CN201921730975.4U
Authority: CN
Inventors: 刘文旭; 张跃年; 贾洪海; 廖庆东; 陈旻; 纪军
Original assignee: Yinglong Huatong Wuhan Technology Development Co ltd
Current assignee: Yinglong Huatong Wuhan Technology Development Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-06-16
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a HDMI difference signal receives converter based on track traffic, including HDMI signal defeated module, HDMI signal compensation module and circuit board, meet HDMI signal interface and multimedia host, multimedia host output HDMI signal to video receiver, video receiver divides HDMI signal integer, HDMI signal is direct by the HDMI signal interface output that sets up on the HDMI distributor all the way, the HDMI signal of output is integrated to be handled by signal equalizer, the HDMI signal has obtained effectual reinforcing and compensation, guarantee the signal strength among the multistage transmission process, another way HDMI signal is decoded by FPGA integrated circuit and is converted into the inside stereo set of standard LVDS signal input to on-vehicle LCD screen, converter internally connected's wire all adopts twisted pair or net line, long distance transmission and the signal cascade that can realize the signal, the signal is more stable, the wiring is simpler.

Description

HDMI differential signal receiving converter based on rail transit

Technical Field

The utility model relates to a HDMI difference signal reception conversion technology field specifically is HDMI difference signal reception converter based on track traffic.

Background

With the rapid development of wireless communication technology and internet technology, in the academic and engineering fields, the transmission of mobile video has attracted high attention, in the rail transit environment, multimedia video plays a good role in entertainment and information transmission, the existing multimedia video signal transmission adopts a direct transmission HDMI signal mode, the connection of a plurality of display devices is realized through a transmission line, but the existing rail transit field (vehicle-mounted part) has higher and higher requirements on the resolution ratio of multimedia video signals and the rigidity of a vehicle-mounted connector, the signals are easily interfered by using the traditional output scheme, the equipment interface connection requirements cannot meet the requirements of a car manufacturer, in order to ensure that the signal processing part of an LCD screen has the bypass functional requirements, the existing signal connection mode at the display screen end generally adopts cascade (one for one, hand-pulling type), when a certain board card in the middle fails, the related connecting equipment can still normally receive signals, and the signals are unstable and complicated in wiring when being transmitted in a long distance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a HDMI difference signal reception converter based on track traffic possesses the signal strength that can guarantee among the multistage transmission process, can realize that the long distance transmission and the signal of signal cascade, and the signal is more stable, lays wire simpler advantage, can solve among the prior art can't guarantee that relevant connecting device still can normally receive the signal, and when signal long distance transmission, the signal is unstable, lays wire complicated problem.

In order to achieve the above object, the utility model provides a following technical scheme: an HDMI differential signal receiving converter based on rail traffic comprises an HDMI signal transmitting module, an HDMI signal compensating module and a circuit board, wherein the HDMI signal transmitting module and the HDMI signal compensating module are both arranged on the circuit board, the HDMI signal transmitting module comprises three HDMI signal interfaces, a signal equalizer, a video receiver, an FPGA integrated circuit, a microcontroller, a memory chip, an audio processing chip, an audio volume amplifying chip and a display terminal, one HDMI signal interface is connected with the signal equalizer through a lead, the signal equalizer is connected with a signal input port of the video receiver through a lead, the FPGA integrated circuit is fixedly arranged in the video receiver, a plurality of memory chips are fixedly arranged in the microcontroller, the microcontroller is connected with the video receiver through an SDA data wire, the microcontroller is fixed in the video receiver, and the video receiver is electrically connected with the FPGA integrated circuit through a lead, the FPGA integrated circuit is connected with the audio processing chip through an SDA data line, the audio processing chip is electrically connected with the audio volume amplification chip through a conducting wire, the audio volume amplification chip is fixedly arranged in the display terminal, and the display terminal is set to be a sound box;

the display terminal is connected with the HDMI signal compensation module; the HDMI signal compensation module comprises an HDMI distributor, a multimedia decoding chip and a multiplexer, wherein a signal input end of the HDMI distributor is connected with a video receiver through a wire, a group of signal output ends of the HDMI distributor are connected with an HDMI signal interface, the other group of signal output ends of the HDMI distributor are electrically connected with the multimedia decoding chip through wires, the multimedia decoding chip is fixedly installed in the multiplexer, and two groups of output ends of the multimedia decoding chip are respectively electrically connected with an audio processing chip and a display terminal through two wires.

Preferably, the microcontroller is a 32-bit microcontroller with the model STM32F103VBT 6.

Preferably, the video receiver is provided with an HDMI signal interface, and the HDMI signal interface is directly connected with the video receiver through a wire.

Preferably, the microcontroller is connected with the plurality of LED prompting lamps through leads, and the LED prompting lamps are all fixed on the circuit board.

Preferably, the microcontroller is connected with the HDMI distributor, the signal equalizer and the multimedia decoding chip through two SDA data lines.

Preferably, the conductors connected between the HDMI signal transmission module, the HDMI signal compensation module and the circuit board are all twisted pairs or network cables.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. according to the HDMI differential signal receiving converter based on rail transit, HDMI signals are directly transmitted to the HDMI distributor and are directly output by the HDMI signal interface arranged on the HDMI distributor, the output HDMI signals are integrated and processed by the signal equalizer, the HDMI signals are effectively enhanced and compensated, and the signal intensity in the multi-level transmission process is ensured;

2. this HDMI difference signal reception converter based on track traffic, the wire of being connected between HDMI signal transmission module, HDMI signal compensation module and the circuit board all adopts twisted pair or net twine, can realize the long distance transmission and the signal cascade of signal, and the signal is more stable, and the wiring is simpler.

Drawings

FIG. 1 is a schematic view of a system framework of an environment for using the device of the present invention;

FIG. 2 is a schematic diagram of a signal processing framework according to the present invention;

fig. 3 is a schematic view of the circuit board structure according to the present invention.

In the figure: 1. an HDMI signal transmission module; 11. an HDMI signal interface; 12. a signal equalizer; 13. a video receiver; 14. an FPGA integrated circuit; 15. a microcontroller; 16. A memory chip; 17. an audio processing chip; 18. an audio volume amplifying chip; 19. a display terminal; 2. an HDMI signal compensation module; 21. an HDMI distributor; 22. a multimedia decoding chip; 23. a multiplexer; 3. a circuit board; 31. LED warning light.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the HDMI differential signal receiving converter based on rail transit comprises an HDMI signal transmitting module 1, an HDMI signal compensating module 2, and a circuit board 3, wherein the HDMI signal transmitting module 1 and the HDMI signal compensating module 2 are both mounted on the circuit board 3, the HDMI signal transmitting module 1 comprises an HDMI signal interface 11, a signal equalizer 12, a video receiver 13, an FPGA integrated circuit 14, a microcontroller 15, a memory chip 16, an audio processing chip 17, an audio volume amplifying chip 18, and a display terminal 19, three HDMI signal interfaces 11 are provided, one HDMI signal interface 11 is connected to the signal equalizer 12 through a wire, the signal equalizer 12 is connected to a signal input port of the video receiver 13 through a wire, the FPGA integrated circuit 14 is fixedly mounted inside the video receiver 13, a plurality of memory chips 16 are fixedly mounted inside the microcontroller 15, the microcontroller 15 is connected to the video receiver 13 through an SDA data line, the microcontroller 15 is fixed inside the video receiver 13, the video receiver 13 is electrically connected with the FPGA integrated circuit 14 through a wire, the FPGA integrated circuit 14 is connected with the audio processing chip 17 through an SDA data line, the audio processing chip 17 is electrically connected with the audio volume amplification chip 18 through a wire, the audio volume amplification chip 18 is fixedly installed inside the display terminal 19, the display terminal 19 is set as a sound, and the display terminal 19 is connected with the HDMI signal compensation module 2; the HDMI signal compensation module 2 comprises an HDMI distributor 21, a multimedia decoding chip 22 and a multiplexer 23, wherein a signal input end of the HDMI distributor 21 is connected with a video receiver 13 through a wire, one group of signal output ends of the HDMI distributor 21 is connected with an HDMI signal interface 11, the other group of signal output ends of the HDMI distributor 21 is electrically connected with the multimedia decoding chip 22 through a wire, the multimedia decoding chip 22 is fixedly installed inside the multiplexer 23, two groups of output ends of the multimedia decoding chip 22 are respectively electrically connected with an audio processing chip 17 and a display terminal 19 through two wires, a microcontroller 15 adopts a 32-bit microcontroller with the model number of STM32F103VBT6, the HDMI signal interface 11 is installed on the video receiver 13, the HDMI signal interface 11 is directly connected with the video receiver 13 through a wire, and the microcontroller 15 is connected with a plurality of LED warning lamps 31 through wires, the LED indicator lamps 31 are all fixed on the circuit board 3, and the microcontroller 15 is connected to the HDMI distributor 21, the signal equalizer 12 and the multimedia decoding chip 22 through two SDA data lines.

The working principle is as follows: the HDMI signal interface 11 is connected with a multimedia host, the multimedia host outputs an HDMI signal to the signal equalizer 12, the signal equalizer 12 sends the received HDMI signal to the video receiver 13, the video receiver 13 divides the HDMI signal into three paths, one path of HDMI signal is directly transmitted to the HDMI distributor 21, and the HDMI signal interface 11 arranged on the HDMI distributor 21 directly outputs the HDMI signal; one path of HDMI signal is directly transmitted to the microcontroller 15 through the SDA data line, the microcontroller 15 is connected with the LED prompting lamp 31 through a wire, the LED prompting lamp 31 is controlled to be lightened, and signal input is prompted; the other path of HDMI signal is decoded and converted into a standard LVDS signal by the FPGA integrated circuit 14, and then the LVDS signal is input into the internal sound of the vehicle-mounted LCD screen through the LCD screen three-in-one board card arranged inside the vehicle-mounted LCD screen.

In summary, the following steps: the HDMI differential signal receiving converter based on the rail transit is characterized in that an HDMI signal interface 11 is connected with a multimedia host, the multimedia host outputs an HDMI signal to a signal equalizer 12, the signal equalizer 12 sends the received HDMI signal to a video receiver 13, the video receiver 13 divides the HDMI signal into three paths, one path of the HDMI signal is directly transmitted to an HDMI distributor 21 and is directly output by the HDMI signal interface 11 arranged on the HDMI distributor 21, the output HDMI signal is integrated and processed by the signal equalizer 12, the HDMI signal is effectively enhanced and compensated, and the signal intensity in a multi-level transmission process is ensured; one path of HDMI signal is directly transmitted to the microcontroller 15 through the SDA data line, the microcontroller 15 is connected with the LED prompting lamp 31 through a wire, the LED prompting lamp 31 is controlled to be turned on, signal input is prompted, and observation of workers is facilitated; the other path of HDMI signal is decoded by the FPGA integrated circuit 14 and converted into a standard LVDS signal, the LVDS signal is input into the internal sound of the vehicle-mounted LCD screen through the LCD screen three-in-one board card arranged inside the vehicle-mounted LCD screen, wires connected among the HDMI signal transmission module, the HDMI signal compensation module and the circuit board are all twisted pairs or network cables, long-distance transmission and signal cascade of the signal can be achieved, the signal is more stable, and wiring is simpler.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. HDMI difference signal reception converter based on track traffic, including HDMI signal transmission module (1), HDMI signal compensation module (2) and circuit board (3), HDMI signal transmission module (1) and HDMI signal compensation module (2) are all installed on circuit board (3), its characterized in that: the HDMI signal transmission module (1) comprises three HDMI signal interfaces (11), signal equalizers (12), video receivers (13), FPGA integrated circuits (14), a microcontroller (15), memory chips (16), an audio processing chip (17), an audio volume amplifying chip (18) and a display terminal (19), wherein one HDMI signal interface (11) is connected with the signal equalizers (12) through a lead, the signal equalizers (12) are connected with signal input ports of the video receivers (13) through leads, the FPGA integrated circuits (14) are fixedly installed in the video receivers (13), the memory chips (16) are fixedly installed in the microcontroller (15), the microcontroller (15) is connected with the video receivers (13) through SDA data lines, and the microcontroller (15) is fixed in the video receivers (13), the video receiver (13) is electrically connected with the FPGA integrated circuit (14) through a lead, the FPGA integrated circuit (14) is connected with the audio processing chip (17) through an SDA data line, the audio processing chip (17) is electrically connected with the audio volume amplification chip (18) through a lead, the audio volume amplification chip (18) is fixedly installed inside the display terminal (19), and the display terminal (19) is set as a sound box;

the display terminal (19) is connected with the HDMI signal compensation module (2); HDMI signal compensation module (2) includes HDMI distributor (21), multimedia decoding chip (22) and multiplexer (23), the signal input part of HDMI distributor (21) meets with video receiver (13) through the wire, a set of signal output part and an HDMI signal interface (11) of HDMI distributor (21) meet, another set of signal output part of HDMI distributor (21) passes through wire and multimedia decoding chip (22) electric connection, multimedia decoding chip (22) fixed mounting is in the inside of multiplexer (23), two sets of outputs of multimedia decoding chip (22) pass through two wires respectively with audio frequency processing chip (17) and display terminal (19) electric connection.

2. The HDMI differential signal reception converter based on rail transit of claim 1, wherein: the microcontroller (15) adopts a 32-bit microcontroller with the model number STM32F103VBT 6.

3. The HDMI differential signal reception converter based on rail transit of claim 1, wherein: the HDMI signal interface (11) is installed on the video receiver (13), and the HDMI signal interface (11) is directly connected with the video receiver (13) through a wire.

4. The HDMI differential signal reception converter based on rail transit of claim 1, wherein: the microcontroller (15) is connected with the LED prompting lamps (31) through wires, and the LED prompting lamps (31) are fixed on the circuit board (3).

5. The HDMI differential signal reception converter based on rail transit of claim 1, wherein: the microcontroller (15) is respectively connected with the HDMI distributor (21), the signal equalizer (12) and the multimedia decoding chip (22) through two SDA data lines.

6. The HDMI differential signal reception converter based on rail transit of claim 1, wherein: the conductors connected among the HDMI signal transmission module (1), the HDMI signal compensation module (2) and the circuit board (3) are all twisted pairs or network cables.