A multi-path scalable audio and video mixing switching device
By designing a multi-channel scalable audio-video mixing and switching device, and adopting a board-based card approach and control system, the problem of poor interface compatibility of existing equipment has been solved. This enables arbitrary switching and control of multi-format video signals, improving the flexibility and scalability of the device, and making it suitable for large-scale conferences and vehicle-mounted command and control sites.
Patent Information
- Application Number
- CN202423176902.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing audio and video switching devices suffer from poor interface compatibility, limited standard support, and inability to simultaneously control signal input and output switching for formats such as HDMI, DVI, SDI, VGA, and AV. They also suffer from poor signal transmission quality, insufficient flexibility and scalability, and require improvement in operation and maintenance systems.
Design a multi-channel expandable audio-video mixing and switching device. It adopts a board-based card approach and supports video signal input and output in formats such as VGA, DVI, HDMI, SDI, and AV. By switching the main board, control board, and button display board, arbitrary switching and control of signals can be achieved. It supports simultaneous switching of 16×16 audio and video signals and combines infrared remote control and remote control.
It enables arbitrary four-channel input and output of video signals of any format, supports free combination and switching of 16 channels of analog/digital video, reduces signal transmission delay, improves the flexibility and scalability of the equipment, and supports physical buttons, infrared and remote control, making it suitable for large conferences and vehicle-mounted command and monitoring sites.
Smart Images
Figure CN223599906U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of audio and video switching matrix, especially to a multi-path extensible audio and video mixing switching device. BACKGROUND
[0002] The existing audio and video switching device has poor interface compatibility, single system, cannot simultaneously satisfy the input and output switching control of signals of HDMI / DVI / SDI / VGA / AV formats, has poor signal transmission quality, obvious deficiency in flexibility and expandability, and the control system of the existing switching device needs to be further improved in device operation and maintenance, and cannot simultaneously support key, infrared and host computer software control. CONTENT OF UTILITY MODEL
[0003] In order to overcome the technical defects of the existing audio and video switching device, such as poor interface compatibility, single system and inability to simultaneously satisfy the input and output switching control of signals of HDMI / DVI / SDI / VGA / AV formats, the utility model provides a multi-path extensible audio and video mixing switching device.
[0004] The utility model provides a kind of multiway scalable audio-video mixing switching equipment, including VGA input board card, VGA output board card, AV input board card, AV output board card, DVI input board card, DVI output board card, HDMI input board card, HDMI output board card, SDI input board card, SDI output board card, switching mainboard, control panel and button display board, VGA input board card, VGA output board card, AV input board card, AV output board card, DVI input board card, DVI output board card, HDMI input board card, HDMI output board card, SDI input board card and SDI output board card are connected with switching mainboard respectively by different CPCI interface, switching mainboard is connected with control panel by first RS232 interface, control panel is connected with host computer of outside by LAN interface and second RS232 interface, control panel is connected with button display board by third RS232 interface, button display board is matched with infrared remote controller;Switching mainboard includes five CPCI input slot, five CPCI output slot, HDMI data exchange module, first MCU and EEPROM module, control panel inputs control instruction into first MCU by first RS232 interface, first MCU is connected with HDMI data exchange module by first 12C interface configuration, HDMI data exchange module is connected with five CPCI input slot and five CPCI output slot respectively, first MCU is connected with EEPROM module by second 12C interface;HDMI data exchange module realizes the arbitrary connection of five CPCI input slot and five CPCI output slot by internal register, and the exchange of HDMI data of input and output slot is realized;Control panel includes network interface PHY, infrared drive circuit and second MCU, second MCU is connected with host computer by network interface PHY and second RS232, and host computer inputs control instruction into second MCU, and second MCU is connected with infrared remote controller by infrared drive circuit, and infrared remote controller inputs infrared instruction into second MCU, and second MCU is connected with the first MCU of switching mainboard by first RS232 interface, and second MCU is connected with button display board by third RS232 interface.
[0005] The multiway scalable audio-video mixing switching equipment can realize signal switching of any one input board card to any one of VGA, DVI, HDMI, SDI and AV output board card, realize gathering of any four of VGA, DVI, HDMI, SDI and AV five formats of video signals, four paths of each video signal, a total of 16 paths of input, arbitrary cross switching output of 16 paths of video signals, and output signals are any four of VGA, DVI, HDMI, SDI and AV five formats.
[0006] Preferably, the key display panel comprises a third MCU, a driving chip and an infrared interface, the third MCU is configured with an infrared remote controller through the infrared interface, the infrared remote controller emits an infrared signal to the infrared interface, the infrared interface outputs an infrared instruction into the third MCU after processing the infrared signal, the third MCU inputs the infrared instruction into the second MCU of the control panel after analyzing the infrared instruction through the third RS232, the third MCU is connected with the key matrix and the nixie tube display screen through the driving chip, the third MCU is connected with the second MCU of the control panel through the third RS232 interface, the control panel inputs control information into the third MCU, and then outputs the key setting information through the nixie tube display screen for display through the driving chip.
[0007] Preferably, the input board card comprises four AV signal entrances, four AV input audio signal entrances, four HDMI sending chips, an AV input ARM chip and an AV input HDMI signal output interface, each AV signal entrance is connected to a corresponding AV input HDMI sending chip through an AV input interface protection circuit, an AV input signal adaptation module and an AV input AV decoding chip, the four AV input audio signal entrances are connected to the four HDMI sending chips through four groups of AV input AD conversion modules, the AV input ARM chip is connected with the four AV input HDMI sending chips, the AV input ARM chip configures the four HDMI sending chips, the four HDMI sending chips synthesize audio and video signals into four HDMI signals and connect to the AV input HDMI signal output interface, and the AV input HDMI signal output interface is connected with the switching mainboard; the AV output board card comprises four AV signal exits, four AV output audio signal exits, four AV output HDMI receiving chips, an AV output ARM chip and an AV output HDMI signal input interface, the switching backboard is connected with the AV output HDMI signal input interface, the AV output HDMI signal input interface is connected with the four HDMI receiving chips, each AV output HDMI receiving chip is connected to the four AV signal exits through an AV encoding chip, an AV output signal adaptation chip and an AV output interface protection circuit, the four AV output HDMI receiving chips are connected to the four AV output audio signal exits through four groups of AV output DA conversion modules, and the AV output ARM chip is connected with the four HDMI receiving chips.
[0008] Preferably, the VGA input board card comprises four VGA signal inlets, four VGA input audio signal inlets, four VGA-to-HDMI modules, a VGA input ARM chip and a VGA input HDMI signal output interface; each VGA signal inlet is connected to a corresponding VGA-to-HDMI module through a VGA input interface circuit and a VGA input signal buffer driving module, the four VGA input audio signal inlets are connected to the four VGA-to-HDMI modules through four VGA input AD conversion circuits, the four VGA-to-HDMI modules are connected to the VGA input ARM chip, and the output signals of the four VGA-to-HDMI modules are connected to the switching mainboard through the VGA input HDMI signal output interface; the VGA output board card comprises four VGA signal outlets, four VGA output audio signal outlets, four HDMI-to-VGA modules, a VGA output ARM chip and a VGA output HDMI signal input interface; each HDMI-to-VGA module is connected to a corresponding VGA signal outlet through a VGA output signal buffer driving module and a VGA output interface circuit, and the four HDMI-to-VGA modules are also connected to the four VGA output audio signal outlets through four DA conversion circuits; the four HDMI-to-VGA modules are connected to the VGA output ARM chip, and the switching mainboard sends four HDMI signals to the input ends of the four HDMI-to-VGA modules through the VGA output HDMI signal input interface.
[0009] Preferably, the DVI input board card comprises four DVI signal inlets, four DVI input audio signal inlets, four DVI input HDMI sending chips, a DVI input ARM chip and a DVI input HDMI signal output interface, each DVI signal inlet is connected to the corresponding DVI input HDMI sending chip through a DVI input interface protection circuit, a DVI input signal buffer driving module and a DVI decoding chip, the four DVI input audio signal inlets are connected to the four HDMI sending chips through four AD conversion modules, the four DVI input HDMI sending chips are connected to the DVI input ARM chip, the four DVI input HDMI sending chips send four HDMI signals to the input end of the DVI input HDMI signal output interface respectively, and the output end of the DVI input HDMI signal output interface is connected to the switching mainboard; the DVI output board card comprises four DVI signal outlets, four DVI output audio signal outlets, four DVI output HDMI receiving chips, a DVI output ARM chip and a DVI output HDMI signal input interface, each DVI output HDMI receiving chip is connected to the corresponding DVI signal outlet through a DVI encoding chip, a DVI output signal adaptation module and a DVI output interface protection circuit, the four DVI output HDMI receiving chips are also connected to the four DVI output audio signal outlets through four DA conversion modules, the four HDMI receiving chips are connected to the DVI output ARM chip, and the switching mainboard sends four HDMI signals to the four HDMI receiving chips through the DVI output HDMI signal output interface respectively.
[0010] Preferably, the HDMI input board card comprises four HDMI signal inlets and an HDMI input HDMI signal output interface, the four HDMI signal inlets are connected to the HDMI input HDMI signal output interface through corresponding HDMI input interface circuits and corresponding HDMI input signal buffer driving circuits respectively, and the output end of the HDMI input HDMI signal output interface is connected to the switching mainboard; the HDMI output board card comprises four HDMI signal outlets and an HDMI output HDMI signal input interface, the HDMI output HDMI signal input interface connects four HDMI signals to the four HDMI signal outlets through corresponding HDMI output signal buffer driving modules and corresponding HDMI output interface circuits in sequence, and the switching mainboard is connected to the input end of the HDMI output HDMI signal input interface.
[0011] Preferably, the SDI input board card includes four-way SDI signal entrances, four-way SDI input HDMI sending chips, an SDI input ARM chip and an SDI input HDMI signal output interface, each of the four-way SDI signal entrances is connected to a corresponding SDI input HDMI sending chip through an SDI input interface protection circuit, an SDI input signal buffer driving module and an SDI decoding chip, the four-way SDI input HDMI sending chips are all connected to the SDI input ARM chip, the four-way SDI input HDMI sending chips send four-way HDMI signals to the SDI input HDMI signal output interface respectively, and an output end of the SDI input HDMI signal output interface is connected to a switching mainboard; the SDI output board card includes four-way SDI signal exits, four-way SDI output HDMI receiving chips, an SDI output ARM chip and an SDI output HDMI signal input interface, each of the four-way SDI output HDMI receiving chips is connected to a corresponding SDI signal exit through an SDI encoding chip, an SDI output signal adaptation module and an SDI output interface protection circuit, the four-way SDI output HDMI receiving chips are all connected to the SDI output ARM chip, and the switching mainboard sends four-way HDMI signals to the four-way SDI output HDMI receiving chips through the SDI output HDMI signal input interface.
[0012] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: the multi-channel extensible audio and video mixing switching equipment supports 16*16 audio and video signal simultaneous switching control, supports display and monitoring of audio and video equipment in large conference sites and vehicle-mounted command monitoring sites, supports physical button input switching control, infrared control and remote control in human-computer interaction, is flexible and convenient to switch, adopts the mode of board plug-in card, supports 16 analog / digital video inputs and 16 analog / digital video outputs, every four channels are a whole, signal interfaces are freely combined, supports HDMI, SDI, VGA, DVI, AV and other formats of video signals, realizes 16 analog / digital video inputs and 16 analog / digital video outputs, and realizes arbitrary switching; the equipment has the advantages of low input and output signal transmission delay, strong video system scalability and multiple switching modes. BRIEF DESCRIPTION OF DRAWINGS
[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present utility model and serve to explain the principles of the present utility model together with the specification.
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, and obviously, other drawings can also be obtained by those skilled in the art without any creative effort on the premise of not paying creative effort.
[0015] Figure 1 It is a module connection schematic diagram of the whole module of the multi-path scalable audio and video mixing switching device described in some embodiments of the present application.
[0016] Figure 2 It is a module connection schematic diagram of the switching mainboard described in some embodiments of the present application.
[0017] Figure 3 It is a module connection schematic diagram of the control board described in some embodiments of the present application.
[0018] Figure 4 It is a module connection schematic diagram of the key display board described in some embodiments of the present application.
[0019] Figure 5 It is a module connection schematic diagram of the AV input board card described in some embodiments of the present application.
[0020] Figure 6 It is a module connection schematic diagram of the AV output board card described in some embodiments of the present application.
[0021] Figure 7 It is a module connection schematic diagram of the VGA input board card described in some embodiments of the present application.
[0022] Figure 8 It is a module connection schematic diagram of the VGA output board card described in some embodiments of the present application.
[0023] Figure 9 It is a module connection schematic diagram of the DVI input board card described in some embodiments of the present application.
[0024] Figure 10 It is a module connection schematic diagram of the DVI output board card described in some embodiments of the present application.
[0025] Figure 11 It is a module connection schematic diagram of the HDMI input board card described in some embodiments of the present application.
[0026] Figure 12 It is a module connection schematic diagram of the HDMI output board card described in some embodiments of the present application.
[0027] Figure 13 It is a module connection schematic diagram of the SDI input board card described in some embodiments of the present application.
[0028] Figure 14 The module connection diagram of the SDI output board card is shown in the embodiment of the utility model. DETAILED DESCRIPTION
[0029] In order to more clearly understand the above purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
[0030] In the description, it should be noted that the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0031] In the following description, many specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from those described herein; Obviously, the examples in the specification are only a part of the embodiments of the utility model, not all the embodiments.
[0032] The following will be combined with the accompanying drawings Figures 1-14 The specific embodiments of the utility model are described in detail.
[0033] In one embodiment, as Figures 1-4The multi-path scalable audio and video mixed switching device includes a VGA input board card, a VGA output board card, an AV input board card, an AV output board card, a DVI input board card, a DVI output board card, an HDMI input board card, an HDMI output board card, an SDI input board card, an SDI output board card, a switching mainboard, a control board and a key display board, the VGA input board card, the VGA output board card, the AV input board card, the AV output board card, the DVI input board card, the DVI output board card, the HDMI input board card, the HDMI output board card, the SDI input board card and the SDI output board card are connected with the switching mainboard through different CPCI interfaces, the switching mainboard is connected with the control board through a first RS232 interface, the control board is connected with an upper computer in the outside world through a LAN interface and a second RS232 interface, the control board is connected with the key display board through a third RS232 interface, and the key display board is matched with an infrared remote controller; the switching mainboard includes five CPCI input slot positions, five CPCI output slot positions, an HDMI data exchange module, a first MCU and an EEPROM module, the control board inputs control instructions into the first MCU through the first RS232 interface, the first MCU is connected with the HDMI data exchange module through a first 12C interface, the HDMI data exchange module is connected with the five CPCI input slot positions and the five CPCI output slot positions, and the first MCU is connected with the EEPROM module through a second 12C interface; the HDMI data exchange module realizes the arbitrary connection of the five CPCI input slot positions and the five CPCI output slot positions through internal registers, and realizes the exchange of HDMI data of the input and output slot positions; the control board includes a network port PHY, an infrared drive circuit and a second MCU, the second MCU is connected with the upper computer through the network port PHY and the second RS232, the upper computer inputs control instructions into the second MCU, the second MCU is connected with the infrared remote controller through the infrared drive circuit, the infrared remote controller inputs infrared instructions into the second MCU, the second MCU is connected with the first MCU of the switching mainboard through the first RS232 interface, and the second MCU is connected with the key display board through the third RS232 interface.
[0034] The multi-path scalable audio and video mixed switching device can realize the switching of the signal of any one input board card to any one of the VGA, DVI, HDMI, SDI and AV output board cards, realizes the gathering of any four of the five formats of VGA, DVI, HDMI, SDI and AV video signals, and realizes the cross switching of 16 input video signals of each video signal, wherein the output signal is any four of the five formats of VGA, DVI, HDMI, SDI and AV.
[0035] On the basis of the above embodiment, in a preferred embodiment, as Figures 5-6As shown, the key display panel includes a third MCU, a driving chip and an infrared interface, the third MCU is configured with an infrared remote controller through the infrared interface, the infrared remote controller emits an infrared signal to the infrared interface, the infrared interface processes the infrared signal and outputs an infrared instruction into the third MCU, the third MCU processes the infrared instruction through the third RS232 analysis and inputs it into the second MCU of the control panel, the third MCU is connected with the key matrix and the nixie tube display screen through the driving chip, the third MCU is connected with the second MCU of the control panel through the third RS232 interface, the control panel inputs control information into the third MCU, and then outputs the key setting information through the nixie tube display screen through the driving chip.
[0036] On the basis of the above embodiment, in a preferred embodiment, the input board card includes four AV signal entrances, four AV input audio signal entrances, four HDMI sending chips, an AV input ARM chip and an AV input HDMI signal output interface, each AV signal entrance is connected to the corresponding AV input HDMI sending chip through an AV input interface protection circuit, an AV input signal adaptation module and an AV input AV decoding chip, the four AV input audio signal entrances are connected to the four HDMI sending chips through four groups of AV input AD conversion modules, the AV input ARM chip is connected with the four AV input HDMI sending chips, the AV input ARM chip configures the four HDMI sending chips, the four HDMI sending chips combine audio and video signals into four HDMI signals and connect to the AV input HDMI signal output interface, and the AV input HDMI signal output interface is connected with the switching mainboard; the AV output board card includes four AV signal exits, four AV output audio signal exits, four AV output HDMI receiving chips, an AV output ARM chip and an AV output HDMI signal input interface, the switching backboard is connected with the AV output HDMI signal input interface, the AV output HDMI signal input interface is connected with the four HDMI receiving chips, each AV output HDMI receiving chip is connected to the four AV signal exits through an AV encoding chip, an AV output signal adaptation chip and an AV output interface protection circuit, the four AV output HDMI receiving chips are connected to the four AV output audio signal exits through four groups of AV output DA conversion modules, and the AV output ARM chip is connected with the four HDMI receiving chips.
[0037] On the basis of the above embodiment, in a preferred embodiment, as Figures 7-8As shown, the VGA input board card includes four VGA signal entrances, four VGA input audio signal entrances, four VGA to HDMI modules, a VGA input ARM chip and a VGA input HDMI signal output interface; each VGA signal entrance is connected to a corresponding VGA to HDMI module through a VGA input interface circuit and a VGA input signal buffer driving module, the four VGA input audio signal entrances are connected to the four VGA to HDMI modules through four VGA input AD conversion circuits, the four VGA to HDMI modules are connected to the VGA input ARM chip, and the output signals of the four VGA to HDMI modules are connected to the switching mainboard through the VGA input HDMI signal output interface; the VGA output board card includes four VGA signal exits, four VGA output audio signal exits, four HDMI to VGA modules, a VGA output ARM chip and a VGA output HDMI signal input interface; each HDMI to VGA module is connected to a corresponding VGA signal exit through a VGA output signal buffer driving module and a VGA output interface circuit, and the four HDMI to VGA modules are also connected to the four VGA output audio signal exits through four DA conversion circuits; the four HDMI to VGA modules are connected to the VGA output ARM chip, and the switching mainboard sends four HDMI signals to the input ends of the four HDMI to VGA modules through the VGA output HDMI signal input interface.
[0038] On the basis of the above-mentioned embodiments, in a preferred embodiment, as Figures 9-10As shown, the DVI input board card includes four DVI signal inlets, four DVI input audio signal inlets, four DVI input HDMI sending chips, a DVI input ARM chip and a DVI input HDMI signal output interface, each DVI signal inlet is connected to the corresponding DVI input HDMI sending chip through a DVI input interface protection circuit, a DVI input signal buffer driving module and a DVI decoding chip, the four DVI input audio signal inlets are connected to the four HDMI sending chips through four AD conversion modules, the four DVI input HDMI sending chips are connected to the DVI input ARM chip, the four DVI input HDMI sending chips send the four HDMI signals to the input end of the DVI input HDMI signal output interface respectively, and the output end of the DVI input HDMI signal output interface is connected to the switching mainboard; the DVI output board card includes four DVI signal outlets, four DVI output audio signal outlets, four DVI output HDMI receiving chips, a DVI output ARM chip and a DVI output HDMI signal input interface, each DVI output HDMI receiving chip is connected to the corresponding DVI signal outlet through a DVI encoding chip, a DVI output signal adaptation module and a DVI output interface protection circuit, the four DVI output HDMI receiving chips are also connected to the four DVI output audio signal outlets through four DA conversion modules, the four HDMI receiving chips are connected to the DVI output ARM chip, and the switching mainboard sends the four HDMI signals to the four HDMI receiving chips through the DVI output HDMI signal output interface respectively.
[0039] On the basis of the above-mentioned embodiment, in a preferred embodiment, as shown in Figures 11-12 As shown, the HDMI input board card includes four HDMI signal inlets and an HDMI input HDMI signal output interface, the four HDMI signal inlets are connected to the HDMI input HDMI signal output interface through corresponding HDMI input interface circuits and corresponding HDMI input signal buffer driving circuits respectively, and the output end of the HDMI input HDMI signal output interface is connected to the switching mainboard; the HDMI output board card includes four HDMI signal outlets and an HDMI output HDMI signal input interface, the four HDMI signals are sequentially connected to the four HDMI signal outlets through corresponding HDMI output signal buffer driving modules and corresponding HDMI output interface circuits by the HDMI output HDMI signal input interface, and the switching mainboard is connected to the input end of the HDMI output HDMI signal input interface.
[0040] On the basis of the above-mentioned embodiment, in a preferred embodiment, as shown in Figures 13-14As shown, the SDI input board card includes four SDI signal entrances, four SDI input HDMI sending chips, an SDI input ARM chip and an SDI input HDMI signal output interface, each of the SDI signal entrances is connected to a corresponding SDI input HDMI sending chip through an SDI input interface protection circuit, an SDI input signal buffer driving module and an SDI decoding chip, the four SDI input HDMI sending chips are connected to the SDI input ARM chip, the four SDI input HDMI sending chips send four HDMI signals to the SDI input HDMI signal output interface respectively, and an output end of the SDI input HDMI signal output interface is connected to the switching mainboard; the SDI output board card includes four SDI signal exits, four SDI output HDMI receiving chips, an SDI output ARM chip and an SDI output HDMI signal input interface, each of the four SDI output HDMI receiving chips is connected to a corresponding SDI signal exit through an SDI encoding chip, an SDI output signal adaptation module and an SDI output interface protection circuit, the four SDI output HDMI receiving chips are connected to the SDI output ARM chip respectively, and the switching mainboard sends four HDMI signals to the four SDI output HDMI receiving chips through the SDI output HDMI signal input interface.
[0041] The above merely describes specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Although the foregoing embodiments are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered in the protection scope of the claims.
Claims
1. A multi-channel scalable audio / video mixing and switching device, characterized in that, The system includes VGA input cards, VGA output cards, AV input cards, AV output cards, DVI input cards, DVI output cards, HDMI input cards, HDMI output cards, SDI input cards, SDI output cards, a switching motherboard, a control board, and a button display board. The VGA input cards, VGA output cards, AV input cards, AV output cards, DVI input cards, DVI output cards, HDMI input cards, HDMI output cards, SDI input cards, and SDI output cards are connected to the switching motherboard via different CPCI interfaces. The switching motherboard is connected to the control board via a first RS232 interface. The control board is connected to an external host computer via a LAN interface and a second RS232 interface. The control board is connected to the button display board via a third RS232 interface. The button display board is equipped with an infrared remote control. The switching motherboard includes five CPCI input slots, five CPCI output slots, an HDMI data exchange module, a first MCU, and an EEPROM module. The control board inputs control commands to the first MCU via a first RS232 interface. The first MCU is configured to connect to the HDMI data exchange module via a first I2C interface. The HDMI data exchange module is connected to the five CPCI input slots and the five CPCI output slots respectively. The first MCU is connected to the EEPROM module via a second I2C interface. The HDMI data exchange module uses its internal registers to achieve arbitrary connections between the five CPCI input slots and the five CPCI output slots, enabling the exchange of HDMI data between the input and output slots. The control board includes a network port PHY, an infrared driver circuit, and a second MCU. The second MCU is connected to the host computer through the network port PHY and the second RS232 interface. The host computer inputs control commands into the second MCU. The second MCU is connected to an infrared remote control through the infrared driver circuit. The infrared remote control inputs infrared commands into the second MCU. The second MCU is connected to the first MCU of the switching motherboard through the first RS232 interface. The second MCU is connected to the button display board through the third RS232 interface.
2. The multi-channel expandable audio-video mixing and switching device according to claim 1, characterized in that, The button display board includes a third MCU, a driver chip, and an infrared interface. The third MCU is configured with an infrared remote control via the infrared interface. The infrared remote control emits infrared signals to the infrared interface. After processing the infrared signals, the infrared interface outputs infrared commands, which are then input into the third MCU. The third MCU performs calculations, parses the infrared commands via a third RS232 interface, and inputs them into the second MCU of the control board. The third MCU is connected to a button matrix and a digital tube display screen via the driver chip. The third MCU is also connected to the second MCU of the control board via a third RS232 interface. The control board inputs control information into the third MCU, which then outputs button setting information via the driver chip, which is displayed on the digital display screen.
3. The multi-channel expandable audio-video mixing and switching device according to claim 1, characterized in that, The AV input board includes four AV signal inputs, four AV audio signal inputs, four HDMI transmitter chips, an AV input ARM chip, and an AV input HDMI signal output interface. Each AV signal input is connected to its corresponding AV input HDMI transmitter chip via an AV input interface protection circuit, an AV input signal adapter module, and an AV input AV decoding chip. The four AV audio signal inputs are connected to the four HDMI transmitter chips via four sets of AV input AD conversion modules. The AV input ARM chip is connected to each of the four AV input HDMI transmitter chips and configures them. The four HDMI transmitter chips combine the audio and video signals into four HDMI signals, which are then connected to the AV input HDMI signal output interface. The HDMI signal output interface is connected to the switching motherboard; the AV output board includes four AV signal outputs, four AV audio signal outputs, four AV HDMI receiver chips, an AV ARM chip, and an AV HDMI signal input interface. The switching back panel is connected to the AV HDMI signal input interface. The AV HDMI signal input interface connects the four HDMI signals to the four HDMI receiver chips respectively. Each AV HDMI receiver chip is connected to the four AV signal outputs through an AV encoding chip, an AV output signal adapter chip, and an AV output interface protection circuit. The four AV HDMI receiver chips are connected to the four AV audio signal outputs through four sets of AV output DA conversion modules. The AV output ARM chip is connected to the four HDMI receiver chips respectively.
4. The multi-channel expandable audio-video mixing and switching device according to claim 1, characterized in that, The VGA input board includes four VGA signal inputs, four VGA audio signal inputs, four VGA to HDMI modules, a VGA input ARM chip, and a VGA to HDMI signal output interface. Each VGA signal input is connected to its corresponding VGA to HDMI module via a VGA input interface circuit and a VGA input signal buffer driver module. The four VGA audio signal inputs are connected to the four VGA to HDMI modules via four VGA input AD conversion circuits. All four VGA to HDMI modules are connected to the VGA input ARM chip. The output signals from the four VGA to HDMI modules are connected to the switching motherboard via the VGA to HDMI signal output interface. (VGA output board package) It includes four VGA signal outputs, four VGA audio signal outputs, four HDMI to VGA modules, a VGA output ARM chip, and a VGA output HDMI signal input interface. Each HDMI to VGA module connects the four video signals to the corresponding VGA signal output through a VGA output signal buffer driver module and a VGA output interface circuit. The four HDMI to VGA modules also connect the four audio signals to the four VGA output audio signal outputs through four DA conversion circuits. All four HDMI to VGA modules are connected to the VGA output ARM chip. The switching motherboard sends the four HDMI signals to the input terminals of the four HDMI to VGA modules through the VGA output HDMI signal input interface.
5. A multi-channel expandable audio-video mixing and switching device according to claim 1, characterized in that, The DVI input board includes four DVI signal inputs, four DVI audio signal inputs, four DVI HDMI input transceiver chips, a DVI input ARM chip, and a DVI HDMI input signal output interface. Each DVI signal input is connected to its corresponding DVI HDMI input transceiver chip via a DVI input interface protection circuit, a DVI input signal buffer driver module, and a DVI decoding chip. The four DVI audio signal inputs are connected to the four HDMI transceiver chips via four AD conversion modules. Each of the four DVI HDMI input transceiver chips is connected to the DVI input ARM chip. The four DVI HDMI input transceiver chips transmit the four HDMI signals to the input terminals of the DVI HDMI input signal output interface. The output terminals of the output interfaces are connected to the switching motherboard; the DVI output board includes four DVI signal outputs, four DVI audio signal outputs, four DVI HDMI receiver chips, a DVI ARM chip, and a DVI HDMI signal input interface. Each DVI HDMI receiver chip is connected to its corresponding DVI signal output through a DVI encoding chip, a DVI output signal adapter module, and a DVI output interface protection circuit. The four DVI HDMI receiver chips are also connected to the four DVI audio signal outputs through four DA conversion modules. All four HDMI receiver chips are connected to the DVI ARM chip. The switching motherboard sends the four HDMI signals to the four HDMI receiver chips through the DVI HDMI signal output interface.
6. A multi-channel expandable audio-video mixing and switching device according to claim 1, characterized in that, The HDMI input board includes four HDMI signal inputs and HDMI input / output interfaces. The four HDMI signal inputs are connected to the HDMI input / output interfaces through corresponding HDMI input interface circuits and corresponding HDMI input signal buffer driver circuits. The output terminals of the HDMI input / output interfaces are connected to the switching motherboard. The HDMI output board includes four HDMI signal outputs and HDMI output / input interfaces. The HDMI output / input interfaces connect the four HDMI signals to the four HDMI signal outputs sequentially through corresponding HDMI output signal buffer driver modules and corresponding HDMI output interface circuits. The switching motherboard is connected to the input terminals of the HDMI output / input interfaces.
7. A multi-channel expandable audio-video mixing and switching device according to claim 1, characterized in that, The SDI input board includes four SDI signal inputs, four SDI input HDMI transmitter chips, an SDI input ARM chip, and an SDI input HDMI signal output interface. Each SDI signal input is connected to its corresponding SDI input HDMI transmitter chip via an SDI input interface protection circuit, an SDI input signal buffer driver module, and an SDI decoding chip. All four SDI input HDMI transmitter chips are connected to the SDI input ARM chip. Each of the four SDI input HDMI transmitter chips sends four HDMI signals to the SDI input HDMI signal output interface, and the output of the SDI input HDMI signal output interface is connected to the switching motherboard. The SDI output board includes four SDI signal outputs, four SDI output HDMI receiver chips, an SDI output ARM chip, and an SDI output HDMI signal input interface. Each SDI output HDMI receiver chip is connected to its corresponding SDI signal output via an SDI encoding chip, an SDI output signal adapter module, and an SDI output interface protection circuit. The four SDI output HDMI receiver chips are connected to the SDI output ARM chip. The switching motherboard sends four HDMI signals to the four SDI output HDMI receiver chips via the SDI output HDMI signal input interface.