HDMI video signal matrix switching device

Abstract

The utility model discloses an HDMI video signal matrix switching device, which adopts HDMI video input ports, a switching matrix module and HDMI video output ports, a plurality of HDMI video input ports are connected with the input end of the switching matrix module, and the output end of the switching matrix module is connected with a plurality of HDMI video output ports. According to the utility model, eight paths of HDMI video signals of different hosts are respectively connected to the switching matrix module, any path of the four paths of displays can be switched, the switching matrix module is realized by cascading four paths of switching controllers, and each path of switching controller can realize 4-input 4-output of HDMI video signals, so that the switching matrix module can be switched to any path of the four paths of displays. The circuit has the characteristics of simple structure, low cost, easy realization, high stability and good reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of video signal processing, and in particular discloses an HDMI video signal matrix switching device. Background Art

[0002] With the development of information technology and the demand for equipment versatility and localization requirements, it is very necessary to improve the compatibility and applicability of equipment. At present, the HDMI (High Definition Multimedia Interface, fully digital video and sound transmission interface) video switching solutions on the market are basically imported solutions, and there is no switching matrix solution that can simultaneously realize 8-channel HDMI video input and 4-channel HDMI video output in the domestic solutions. Therefore, in the case of multiple HDMI video inputs and multiple HDMI video outputs, it is necessary to frequently plug and unplug cables or use multiple switches to meet the needs. This method is inconvenient to operate and is not operational in certain usage environments.

[0003] Therefore, the existing HDMI video signal matrix switching device is inconvenient to operate and is not operable in certain usage environments, which is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model provides an HDMI video signal matrix switching device, aiming to solve the technical problems that the existing HDMI video signal matrix switching device is inconvenient to operate and has no operability in certain use environments.

[0005] The utility model relates to an HDMI video signal matrix switching device, comprising an HDMI video input port, a switching matrix module and an HDMI video output port, wherein a plurality of HDMI video input ports are connected to the input end of the switching matrix module, and the output end of the switching matrix module is connected to a plurality of HDMI video output ports.

[0006] Furthermore, the switching matrix module includes 4-way switching controllers connected in cascade and an MCU connected to the 4-way switching controllers respectively.

[0007] Furthermore, the MCU is connected to the 4-way switching controllers respectively through the IIC bus.

[0008] Furthermore, the HDMI video signal matrix switching device also includes an RS232 interface, and the MCU is connected to the RS232 interface.

[0009] Furthermore, the switching matrix module includes an audio and video acquisition processing chip.

[0010] Furthermore, the model of the audio and video acquisition processing chip used is MS1826.

[0011] Furthermore, the HDMI video input port is connected to the host.

[0012] Furthermore, the HDMI video output port is connected to a display.

[0013] The beneficial effects achieved by the utility model are:

[0014] The utility model provides an HDMI video signal matrix switching device, which adopts an HDMI video input port, a switching matrix module and an HDMI video output port, wherein a plurality of HDMI video input ports are connected to the input end of the switching matrix module, and the output end of the switching matrix module is connected to a plurality of HDMI video output ports. The HDMI video signal matrix switching device provided by the utility model connects HDMI video signals of 8 different hosts to the switching matrix module respectively, and can be switched to any one of four displays. The switching matrix module is realized by cascading 4-way switching controllers, and each switching controller can realize 4-input and 4-output of HDMI video signals, and has the characteristics of simple circuit structure, low cost, easy realization, high stability and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a functional block diagram of the HDMI video signal matrix switching device of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the HDMI video signal matrix switching device of the utility model;

[0017] Figure 3 It is a cascade schematic diagram of the internal structure of the switching matrix module in the HDMI video signal matrix switching device of the utility model;

[0018] Figure 4 It is a switching logic diagram of a switching controller in the HDMI video signal matrix switching device of the utility model;

[0019] Figure 5 The utility model is a circuit schematic diagram of a switching matrix module in an HDMI video signal matrix switching device.

[0020] Description of Figure Numbers:

[0021] 10. HDMI video input port; 20. Switching matrix module; 30. HDMI video output port; 21. Switching controller; 22. MCU; 40. RS232 interface. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1 and Figure 2 As shown, the first embodiment of the utility model proposes an HDMI (High Definition Multimedia Interface) video signal matrix switching device, comprising an HDMI video input port 10, a switching matrix module 20 and an HDMI video output port 30, wherein a plurality of HDMI video input ports 10 are connected to the input end of the switching matrix module 20, and the output end of the switching matrix module 20 is connected to a plurality of HDMI video output ports 30. In this embodiment, the HDMI video input port 10, the switching matrix module 20 and the HDMI video output port 30 can adopt existing functional modules.

[0024] Further, see Figures 1 to 5 In the HDMI video signal matrix switching device provided in this embodiment, the switching matrix module 20 includes 4-way switching controllers 21 connected in cascade and MCU (Microcontroller Unit) 22 respectively connected to the 4-way switching controllers 21. In this embodiment, MCU22 is respectively connected to the 4-way switching controllers 21 through an IIC (Inter-Integrated Circuit) bus. The HDMI video signal matrix switching device also includes an RS232 interface 40, and MCU22 is connected to the RS232 interface 40. Preferably, the switching matrix module 20 includes an audio and video acquisition processing chip. The model of the audio and video acquisition processing chip is MS1826. The HDMI video input port 10 is connected to the host for inputting video signals. The HDMI video output port 30 is connected to the display for outputting video signals. In the HDMI video signal matrix switching device provided in this embodiment, the HDMI video signals of 8 different hosts are respectively connected to the switching matrix, and can be switched to any one of the four displays, and the switching control is realized by the MCU in the switching matrix receiving the control command through the RS232 interface. The switching matrix is ​​realized by cascading 4-way switching controllers. Each switching controller can realize 4 inputs and 4 outputs of HDMI video signals. The switching controller is connected through the IIC interface of the MCU to realize seamless switching function.

[0025] like Figures 1 to 5 As shown, the HDMI video signal matrix switching device provided in this embodiment has a working principle as follows:

[0026] The switching matrix module 20 is realized by a cascade of 4-way switching controllers 21 to realize matrix switching; each switching controller 21 supports video channel switching of 4-way HDMI video input and 4-way HDMI video output; the switching controller 21 uses the domestic HD multi-function video processor MS1826, which supports seamless matrix switching of 4-way HDMI input and 4-way HDMI output. After the host computer sends the video source of the TX channel output to MCU22 through RS232, MCU22 configures MUX (Multiplexer) through the IIC interface of MS1826 for switching.

[0027] Please see Figures 2 to 5 , switch controller 1 outputs two HDMI signals to switch controller 2 and switch controller 3 respectively; the input signals of switch controller 2 are two video signals of switch controller 1 and host 1 / 2, a total of 4 video input signals, and then outputs 2 video signals to switch controller 4; the input signals of switch controller 3 are two video signals of switch controller 1 and host 7 / 8, a total of 4 video input signals, and then outputs 2 video signals to switch controller 4; switch controller 4 introduces 4 HDMI signal inputs of the previous level (two of switch controller 2 and two of switch controller 3) to realize the matrix switching function of 4 HDMI outputs. To ensure that each HDMI_INx signal can be switched to HDMI_OUTx channel at will, each switch controller can only output two HDMI video signals to the next level switch controller module, so a total of 8 HDMI video inputs require 4 switch controllers to ensure the matrix switching function of 4 HDMI video outputs. The above switching logic can realize the matrix switching function of HDMI video signals with 8 inputs and 4 outputs.

[0028] The present embodiment provides an HDMI video signal matrix switching device. Compared with the prior art, the HDMI video input port, the switching matrix module and the HDMI video output port are adopted, wherein a plurality of HDMI video input ports are connected to the input end of the switching matrix module, and the output end of the switching matrix module is connected to a plurality of HDMI video output ports. The HDMI video signal matrix switching device provided by the present embodiment connects 8 HDMI video signals of different hosts to the switching matrix module respectively, and can switch to any one of the four display channels. The switching matrix module is realized by cascading 4 switching controllers, and each switching controller can realize 4 inputs and 4 outputs of HDMI video signals. The HDMI video signal matrix switching device provided by the present embodiment has the characteristics of simple circuit structure, low cost, easy realization, high stability and good reliability.

[0029] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An HDMI video signal matrix switching device, characterized in that: The invention comprises an HDMI video input port (10), a switching matrix module (20) and an HDMI video output port (30), wherein a plurality of the HDMI video input ports (10) are connected to the input end of the switching matrix module (20), and the output end of the switching matrix module (20) is connected to the plurality of the HDMI video output ports (30); the switching matrix module (20) comprises cascade-connected 4-way switching controllers (21) and MCUs (22) respectively connected to the 4-way switching controllers (21).

2. The HDMI video signal matrix switching device according to claim 1, wherein: The MCU (22) is connected to the four-way switching controllers (21) respectively via an IIC bus.

3. The HDMI video signal matrix switching device according to claim 1, wherein: The HDMI video signal matrix switching device also includes an RS232 interface (40), and the MCU (22) is connected to the RS232 interface (40).

4. The HDMI video signal matrix switching device according to claim 1, wherein: The switching matrix module (20) comprises an audio and video acquisition processing chip.

5. The HDMI video signal matrix switching device according to claim 4, characterized in that: The model of the audio and video acquisition processing chip used is MS1826.

6. The HDMI video signal matrix switching device according to claim 1, wherein: The HDMI video input port (10) is connected to a host.

7. The HDMI video signal matrix switching device according to claim 1, wherein: The HDMI video output port (30) is connected to a display.

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