CN114760446A - High-bandwidth low-delay vehicle-mounted audio and video transmission system based on 5G communication - Google Patents

Abstract

The invention discloses a high-bandwidth low-delay vehicle-mounted audio and video transmission system based on 5G communication, which comprises a central main control board, a communication board, an MCU exchange board and a video board, wherein the communication board comprises an embedded development board which is electrically connected with a first 5G communication module, a second 5G communication module and a Wifi module through a USB connector; the embedded development board is electrically connected with the central main control board, and the central main control board is electrically connected with a plurality of RS232 connectors, a plurality of CAN connectors and RS485 connectors. The invention can be connected with a 5G communication network, can transmit hot spots to other equipment through a Wifi module for use, can use the network at any time and any place, transmits videos to background software through HDMI and can access a plurality of aerial heads to meet the access of different vehicle-mounted modules, wherein the system is provided with a plurality of interfaces, can be in butt joint with most vehicle-mounted equipment, and uploads the running condition of the vehicle-mounted equipment in real time so as to facilitate information interaction with an emergency center or a command center.

Description

A high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication

technical field

The invention relates to the technical field of ambulances, in particular to a high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication.

Background technique

At present, the medical equipment data is reported to the medical center through the phone of the medical staff in the car, and the data transmission cannot achieve continuity and multi-path. The number of supported medical equipment causes a lot of work pressure for the medical staff, and the data of the cameras inside and outside the car is stored first. In the hard disk in the car, it can be retrieved separately when necessary, or periodically copied from the hard disk of the car to the medical center through the medium for data storage, which cannot be observed and commanded in real time; simple treatment of patients in the car requires remote assistance from experts and In the hospital, medical staff conduct simple communication through mobile phone communication or mobile video (unstable and cannot be supported for a long time), and the on-board OBD system, through a separate communication system, transmits vehicle information to the command center and dispatching in real time, monitoring the speed of the vehicle, GPS location, driver status, etc., to facilitate vehicle command and dispatch in the background. The network connection for in-vehicle medical equipment on the market, that is, the data of multi-channel in-vehicle medical equipment, the data of the cameras inside and outside the car, the data of the vehicle OBD and the audio and video high-definition communication data of the vehicle 5G smart terminal are simultaneously transmitted through 5G to the emergency center or commander. There is no equipment for communication in the center, which cannot meet the high-bandwidth and low-latency characteristics of emergency vehicles through 5G communication, and achieve the purpose of real-time transmission of multiple data streams. Therefore, we improved this and proposed a high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:

The present invention is a high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication, comprising a central main control board, a communication board, an MCU switch board and a video board, the communication board includes an embedded development board, and the embedded development The board is electrically connected with the first 5G communication module and the second 5G communication module through the USB connector; the embedded development board (5) is electrically connected with the Wifi module; the embedded development board is electrically connected with the central main control board, The central main control board is electrically connected with a plurality of RS232 connectors, a plurality of CAN connectors and RS485 connectors, the MCU switch board includes a first switch and a second switch that are electrically connected, and the first switch is connected to the embedded development The boards are electrically connected; the video board includes a main board with a Hi3521D chip, the main board is provided with a plurality of Vi interfaces, and the main board is electrically connected with a dual-mode receiving module through several of the Vi interfaces, and the dual-mode receiving module The module is electrically connected to a multi-mode input and output module; the multi-mode input and output module is electrically connected with an HDMI interface and a VGA interface, the first switch is provided with a WAN interface and a plurality of LAN interfaces; the second switch is connected with Multiple video interfaces.

As a preferred technical solution of the present invention, the second switch is provided with an Android interface connected to an external Android mainboard, the central main control board is provided with a GPS/BD module, and the second switch is provided with an X86 mainboard X86 interface.

As a preferred technical solution of the present invention, a plurality of the RS232 connectors, the plurality of CAN connectors and the RS232 connectors are all electrically connected with aviation heads.

As a preferred technical solution of the present invention, the main board is provided with a power supply circuit for supplying power to the Hi3521D chip, the power supply circuit includes a power supply chip DDR2 telecommunicationly connected to the Hi3521D chip, and two Vref leads of the power supply chip DDR2 The pins are connected in parallel and a voltage divider circuit is connected.

As a preferred technical solution of the present invention, the voltage divider circuit includes resistors R1, R2; capacitors C1, C2, C3 and C4, and the common end of the two Vref pins is one end of the capacitor C1 and one end of the capacitor C2. , one end of capacitor C3, one end of capacitor C4, one end of resistor R1, and one end of resistor R2 are electrically connected, and the other end of one end of capacitor C1 is electrically connected to the other end of resistor R1 and connected to the loading voltage of 1.5v , the other end of the capacitor C2 is electrically connected to the other end of the capacitor C3, the other end of the capacitor C4, and one end of the resistor R2 and is grounded.

As a preferred technical solution of the present invention, the capacitance values of the capacitors C1, C2, C3 and C4 are 100nF, and the resistance values of the resistors R1 and R2 are both 1kΩ.

As a preferred technical solution of the present invention, a filter circuit is electrically connected to the 1v0 pin of the Hi3521D chip.

As a preferred technical solution of the present invention, the filter circuit includes a parallel circuit formed by capacitors C5, C6, C7, C8, C9, C10, C11, C12, C13, C14 and C15 connected in parallel. One end of the circuit is electrically connected to the 1v0 pin of the Hi3521D chip; the other end of the parallel circuit is grounded.

As a preferred technical solution of the present invention, the capacitance values of the capacitors C5, C6, C7, C8, C9, C10, C11, C12, C13, C14 and C15 are 100nF.

The beneficial effects of the present invention are:

1. This high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication is connected to the 5G communication network by having the first 5G communication module and the second 5G communication module communication board, so that it has an extremely stable network communication function, and through The Wifi module transmits hotspots for use by other devices, can use the network anytime and anywhere, transmits video to the background software through HDMI, and can be connected to multiple aviation heads to meet the access of different modules in the vehicle, such as RS232 connector, CAN, etc., through the GPS module. Real-time positioning of the vehicle position; the system has a variety of interfaces, which can be connected with most of the on-board equipment, and the operation of the on-board equipment can be uploaded in real time to facilitate information exchange with the emergency center or command center, and through the settings The main board with Hi3521D chip is used as a video board. The Hi3521D chip is a professional high-end SOC chip developed for the application of multi-channel D1 and multi-channel HD DVR and NVR products. The engine with protocol encoding and decoding capabilities and the dedicated TOE network acceleration module meet the increasingly high-definition applications and network requirements; integrate excellent video engines and encoding and decoding algorithms and combine multi-channel high-definition display output capabilities, with high bandwidth and low latency. The video board also has rich video interfaces, which not only meet the high-bandwidth and low-latency characteristics of emergency vehicles through 5G communication, At the same time, the purpose of real-time transmission of multiple data streams is achieved.

1. In this high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication, a power supply circuit for supplying power to the Hi3521D chip is provided on the motherboard. The power supply circuit includes a power supply chip DDR2 that is telecommunicationly connected to the Hi3521D chip. The two Vref pins of the power supply chip DDR2 are connected in parallel and connected with a voltage divider circuit, which has the characteristics of stable power supply, which effectively reduces the fluctuation of the Hi3521D chip and ensures the stability of the Hi3521D chip operation.

2. In this high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication, a filter circuit is electrically connected to the 1v0 pin of the Hi3521D chip to filter and reduce noise for the power supply of the Hi3521D chip, thereby ensuring the Hi3521D The chip has precise high-bandwidth and low-latency functions.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

1 is a schematic diagram of the electrical connection of a high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication of the present invention;

2 is a filter circuit of a voltage divider circuit of a high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication of the present invention;

3 is a circuit diagram of a filter circuit of a high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication of the present invention.

In the figure: 1. Central main control board; 2. Communication board; 3. MCU switch board; 4. Video board; 5. Embedded development board; 6. USB connector; 7. The first 5G communication module; 8. The first 2. 5G communication module; 9. Wifi module; 10. RS232 connector; 11. CAN connector; 12. RS485 connector; 13. First switch; 14. Second switch; 15. Motherboard; 16. Vi interface; 17. Dual mode Receiver module; 18, multi-mode input and output module; 19, HDMI interface; 20, VGA interface; 21, WAN interface; 22, LAN interface; 23, video interface; 24, Android interface; 25, X86 interface; 26, aviation head ; 27. GPS/BD module.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Example: As shown in Figures 1, 2 and 3, a high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication of the present invention includes a central main control board 1, a communication board 2, an MCU switch board 3 and a The video board 4, the communication board 2 includes an embedded development board 5, the embedded development board 5 is electrically connected with a first 5G communication module 7 and a second 5G communication module 8 through the USB connector 6, the embedded development board (5) The Wifi module 9 is electrically connected; the embedded development board 5 is electrically connected to the central main control board 1 , and the central main control board 1 is electrically connected to a plurality of RS232 connectors 10 and a plurality of CAN connectors 11 and RS485 connector 12, the MCU switch board 3 includes a first switch 13 and a second switch 14 that are electrically connected, and the first switch 13 is electrically connected to the embedded development board 5; the video board 4 includes a The main board 15 of the Hi3521D chip, the main board 15 is provided with a plurality of Vi interfaces 16, and the main board 15 is electrically connected with a dual-mode receiving module 17 through several of the Vi interfaces 15, and the dual-mode receiving module 17 is electrically connected with multiple A mode input and output module 18; the multi-mode input and output module 18 is electrically connected with an HDMI interface 19 and a VGA interface 20, the first switch 13 is provided with a WAN interface 21 and a plurality of LAN interfaces 22; the second switch 5 A plurality of video interfaces 23 are connected thereon. The 5G communication network is connected by the communication board with the first 5G communication module and the second 5G communication module, so that it has extremely stable network communication function, and the hotspot is transmitted to other devices through the Wifi module, which can use the network anytime, anywhere, and transmit through HDMI. The video is sent to the background software and the multi-channel aviation head can be connected to meet the access of different modules in the vehicle, such as RS232 connector, CAN, etc., and the vehicle position can also be located in real time through the GPS module; the system has a variety of interfaces, which can be connected with absolute Most of the in-vehicle equipment is connected, and the operation status of the in-vehicle equipment is uploaded in real time to facilitate information exchange with the emergency center or command center, and the main board with the Hi3521D chip is set as the video board. The Hi3521D chip is for multi-channel D1. A professional high-end SOC chip developed with multi-channel high-definition DVR and NVR products, Hi3521 built-in high-performance A9 processor, up to 8-channel D1 real-time multi-protocol encoding and decoding engine and dedicated TOE network acceleration module, to cope with increasingly high meet the high-definition application and network requirements; integrate excellent video engine and codec algorithm combined with multi-channel high-definition display output capability, with high-bandwidth and low-latency functions, thus ensuring low-latency between vehicle personnel and emergency centers or command centers. The video board also has rich video interfaces, which not only meets the high bandwidth and low latency characteristics of emergency vehicles through 5G communication, but also achieves the purpose of real-time transmission of multiple data streams.

The present invention mainly solves the problem of concurrent transmission of multi-channel vehicle audio and video data streams through the high bandwidth and low delay characteristics of 5G, and can simultaneously support at least four channels of video communication (medical equipment, on-site environment cameras, vehicle OBD, terminal audio and video collection) device) concurrent and real-time communication, greatly integrating the data exchange on the medical vehicle, expanding the application scenarios of in-vehicle emergency, so that remote experts and medical centers can see the surrounding conditions of the vehicle, the condition of the driver’s illness/injured, and the situation of the vehicle in real time. All images and data of medical equipment, high-definition audio and video conference communication with medical personnel on the vehicle, can provide the most powerful remote support for on-site first aid and on-board rescue.

The present invention can connect the vehicle, monitor the speed of the vehicle, the oil pressure, the status of the driver (through the camera), the driving route, etc.; it can also be connected with other equipment on the vehicle (6-10 types of medical equipment are connected at the same time); it can be connected with Hospitals and emergency centers hold high-definition video conferences, and if there are more, 25 videos can be accessed at the same time, that is, 25 windows for display; cameras inside and outside the car can be mobilized (such as accident scene monitoring and display); all data on the front line can be transmitted through 5G signals. Sent to the rear command center. Such functions as the above require a high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication, so our company has developed video boards and core boards based on the above requirements. By combining 5G modules and antennas, multiple data streams can be achieved. Real-time delivery.

The first 5G communication module 7 and the second 5G communication module 8 can be connected to the mobile 5G communication module and the communication module respectively, and can be used in cooperation with multiple network operators, thereby increasing the coverage area of the signal.

The video board 4 is provided with a storage hard disk 28 electrically connected to the main board 15 for storing video.

The second switch 13 is provided with an Android interface 24 connected to an external Android mainboard, the central main control board 5 is provided with a GPS/BD module 27, and the second switch 13 is provided with an X86 interface 25 with an X86 mainboard.

The plurality of RS232 connectors 10 , the plurality of CAN connectors 11 and the RS232 connectors 12 are all electrically connected with an aviation head 26 .

The main board 15 is provided with a power supply circuit for supplying power to the Hi3521D chip, the power supply circuit includes a power supply chip DDR2 telecommunicationly connected to the Hi3521D chip, and two Vref pins of the power supply and power supply chip DDR2 are connected in parallel with a voltage divider circuit.

The voltage divider circuit includes resistors R1, R2; capacitors C1, C2, C3 and C4, the common end of the two Vref pins and one end of the capacitor C1, one end of the capacitor C2, one end of the capacitor C3, and one end of the capacitor C4 , one end of the resistor R1 and one end of the resistor R2 are electrically connected, the other end of one end of the capacitor C1 is electrically connected to the other end of the resistor R1 and connected to the loading voltage of 1.5v, and the other end of the capacitor C2 is connected to the capacitor The other end of C3, the other end of capacitor C4, and one end of resistor R2 are electrically connected and grounded. The capacitance values of the capacitors C1, C2, C3 and C4 are 100nF, and the resistance values of the resistors R1 and R2 are both 1kΩ. It has the characteristics of stable power supply, which effectively reduces the fluctuation of the Hi3521D chip and ensures the stability of the operation of the Hi3521D chip.

A filter circuit is electrically connected to the 1v0 pin of the Hi3521D chip. The filter circuit includes a parallel circuit formed by capacitors C5, C6, C7, C8, C9, C10, C11, C12, C13, C14 and C15 connected in parallel. One end of the parallel circuit is connected to the 1v0 pin of the Hi3521D chip. Electrical connection; the other end of the parallel circuit is grounded. The capacitance values of the capacitors C5, C6, C7, C8, C9, C10, C11, C12, C13, C14 and C15 are 100 nF. To filter and reduce the noise of the power supply of the Hi3521D chip, thus ensuring that the Hi3521D chip has accurate high-bandwidth and low-latency functions

Working principle: Connect the 5G communication network by having the first 5G communication module and the second 5G communication module communication board, so as to have extremely stable network communication function, and transmit hotspots to other devices through the Wifi module, you can use the network anytime, anywhere, The video is transmitted to the background software through HDMI and the multi-channel aviation head can be connected to meet the access of different modules in the vehicle, such as RS232 connector, CAN, etc., and the vehicle position can also be located in real time through the GPS module; among which the system has a variety of interfaces, It can connect with most of the on-board equipment, upload the operation status of the on-board equipment in real time to facilitate information exchange with the emergency center or command center, and set the main board with the Hi3521D chip as the video board, of which the Hi3521D chip is for A professional high-end SOC chip developed by multi-channel D1 and multi-channel high-definition DVR and NVR products, Hi3521 built-in high-performance A9 processor, up to 8-channel D1 real-time multi-protocol encoding and decoding engine and dedicated TOE network acceleration module, to cope with more and more High-definition applications and network requirements come higher; integrating excellent video engine and codec algorithm combined with multi-channel high-definition display output capability, with high-bandwidth and low-latency functions, thus ensuring that the on-board personnel can communicate with the emergency center or command center. Low-latency synchronous video communication, in which the video board also has a wealth of video interfaces, which not only meets the high-bandwidth and low-latency characteristics of emergency vehicles through 5G communication, but also achieves the purpose of real-time transmission of multiple data streams.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication, characterized in that it comprises a central main control board (1), a communication board (2), an MCU switch board (3) and a video board (4) , the communication board (2) comprises an embedded development board (5), the embedded development board (5) is electrically connected with a first 5G communication module (7) and a second 5G communication module via the USB connector (6) The module (8), the embedded development board (5) is electrically connected with the Wifi module (9); the embedded development board (5) is electrically connected with the central main control board (1), and the central main control board ( 1) A plurality of RS232 connectors (10), a plurality of CAN connectors (11) and RS485 connectors (12) are connected to the power-on, and the MCU switch board (3) includes a first switch (13) and a second switch (13) that are electrically connected a switch (14), the first switch (13) is electrically connected to the embedded development board (5); the video board (4) includes a mainboard (15) with a Hi3521D chip, and the mainboard (15) is A plurality of Vi interfaces (16) are provided, and the main board (15) is electrically connected with a dual-mode receiving module (17) through several of the Vi interfaces (15), and the dual-mode receiving module (17) is electrically connected to the multi-mode receiving module (17). An input and output module (18); the multi-mode input and output module (18) is electrically connected with an HDMI interface (19) and a VGA interface (20), and the first switch (13) is provided with a WAN interface (21) and multiple A plurality of video interfaces (23) are connected to the second switch (5). 2. A high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication according to claim 1, wherein the second switch (13) is provided with an Android interface ( 24), the central main control board (5) is provided with a GPS/BD module (27), and the second switch (13) is provided with an X86 interface (25) with the X86 mainboard. 3. A high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication according to claim 1, characterized in that, a plurality of the RS232 connectors (10), a plurality of CAN connectors (11) and RS232 connectors (12) is electrically connected with the aviation head (26). 4. A high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication according to claim 1, wherein the main board (15) is provided with a power supply circuit for supplying power to the Hi3521D chip, and the power supply The circuit includes a power supply chip DDR2 that is telecommunicationly connected to the Hi3521D chip, and two Vref pins of the power supply and power supply chip DDR2 are connected in parallel with a voltage divider circuit. 5. The high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication according to claim 4, wherein the voltage divider circuit comprises resistors R1, R2; capacitors C1, C2, C3 and C4, The common ends of the two Vref pins are electrically connected to one end of the capacitor C1, one end of the capacitor C2, one end of the capacitor C3, one end of the capacitor C4, one end of the resistor R1, and one end of the resistor R2, and one end of the capacitor C1 is electrically connected. The other end of the capacitor C2 is electrically connected to the other end of the resistor R1 and connected to the loading voltage of 1.5v, and the other end of the capacitor C2 is electrically connected to the other end of the capacitor C3, the other end of the capacitor C4, and the one end of the resistor R2 and grounded. 6. The high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication according to claim 5, wherein the capacitance values of the capacitors C1, C2, C3 and C4 are 100nF, and the resistance R1 , R2 resistance is 1kΩ. 7 . The high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication according to claim 1 , wherein a filter circuit is electrically connected to the 1v0 pin of the Hi3521D chip. 8 . 8. The high-bandwidth and low-latency vehicle-mounted audio and video transmission system based on 5G communication according to claim 7, wherein the filter circuit comprises capacitors C5, C6, C7, C8, C9, A parallel circuit formed by C10, C11, C12, C13, C14 and C15, one end of the parallel circuit is electrically connected to the 1v0 pin of the Hi3521D chip; the other end of the parallel circuit is grounded. 9. The high-bandwidth and low-latency vehicle audio and video transmission system based on 5G communication according to claim 8, wherein the capacitors C5, C6, C7, C8, C9, C10, C11, C12, C13 , C14 and C15 have a capacitance value of 100nF.

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