CN220915319U - Video matrix switcher and video matrix switching system - Google Patents

Abstract

The application provides a video matrix switcher and a video matrix switching system, wherein the video matrix switcher comprises a plurality of paths of video source input interfaces, a plurality of paths of video source output interfaces, a matrix switching unit and a first main control chip; the video source output interface is a network interface and is used for connecting video receiving equipment; the matrix switching unit is connected between a plurality of paths of video source input interfaces and a plurality of paths of video source output interfaces, and comprises a matrix switching module and a conversion module which are mutually connected, wherein the matrix switching module is used for communicating different paths of video source input interfaces with different paths of video source output interfaces, and the conversion module is used for carrying out bandwidth compression on video source data; the first main control chip is connected with the matrix switching module. The application solves the problem that the transmission distance of video signals is limited because the existing video matrix switcher only supports the input and output of video sources of HDMI interfaces.

Description

Video matrix switcher and video matrix switching system

Technical Field

The present application relates to the field of video matrix technologies, and in particular, to a video matrix switcher and a video matrix switching system.

Background

Currently, in the LCD display industry, a display device is usually required to support output applications of multiple input sources, for example, in a meeting room application scenario, an LCD liquid crystal screen usually displays PPT pages, and when the display device needs to switch to a picture display captured by a camera or to switch to a display picture display on another computer, the input sources need to be plugged and replaced to meet the requirements, which is complicated. Video matrix switcher devices are thus presented that can transmit one or more video signals separately to one or more display devices, reducing manual plugging actions.

However, the existing video matrix switch is usually a multiplexed HDMI input, and the multiplexed HDMI output device only supports the video source input and output of the HDMI, and the transmission distance cannot be too long due to the limitation of the HDMI, so that the transmission distance of the video signal is limited.

Disclosure of utility model

The embodiment of the application provides a video matrix switcher and a video matrix switching system, which solve the problem that the transmission distance of video signals is limited because the existing video matrix switcher only supports the input and output of a video source of an HDMI interface.

The utility model is realized in such a way that a video matrix switcher comprises a plurality of paths of video source input interfaces, a plurality of paths of video source output interfaces, a matrix switching unit and a first main control chip; the video source output interface is a network interface and is used for connecting video receiving equipment; the matrix switching unit is connected between a plurality of paths of video source input interfaces and a plurality of paths of video source output interfaces, and comprises a matrix switching module and a conversion module which are mutually connected, wherein the matrix switching module is used for communicating different paths of video source input interfaces with different paths of video source output interfaces, and the conversion module is used for carrying out bandwidth compression on video source data; the first main control chip is connected with the matrix switching module.

In one embodiment, the video source input interface is an HDMI interface;

The video source output interface is an RJ45 interface, and the RJ45 interface is used for connecting the video receiving equipment through a network cable.

In one embodiment, the matrix switching module has an input and an output;

Each path of HDMI interface is connected with one conversion module, the conversion module is connected with the input end, and each path of RJ45 interface is connected with the output end.

In one embodiment, the matrix switching module includes at least one matrix switching chip, and each path of HDMI signal received by the HDMI interface is divided into at least one group of HDMI sub-signals;

At least one group of HDMI sub-signals are respectively input into at least one matrix switching chip through the conversion module in a one-to-one correspondence mode, and each matrix switching chip inputs the received HDMI sub-signals into each path of RJ45 interface.

In one embodiment, the number of the HDMI interfaces and the RJ45 interfaces is four;

the matrix switching module comprises a matrix switching chip, HDMI signals received by each path of HDMI interface are input into the matrix switching chip through the conversion module, and the matrix switching chip inputs the received HDMI signals into each path of RJ45 interface.

In one embodiment, the number of the HDMI interfaces and the RJ45 interfaces is eight;

The matrix switching module comprises two matrix switching chips, and each path of HDMI signals received by the HDMI interface is divided into two groups of HDMI sub signals;

the two groups of sub HDMI signals are respectively input into two matrix switching chips through the conversion module in a one-to-one correspondence mode, and each matrix switching chip inputs the received sub HDMI signals into each path of RJ45 interface.

In one embodiment, the number of the HDMI interfaces and the RJ45 interfaces is sixteen;

The matrix switching module comprises four matrix switching chips, and each path of HDMI signals received by the HDMI interface are divided into four groups of HDMI sub signals;

The four groups of the sub HDMI signals are respectively input into four matrix switching chips through the conversion module in a one-to-one correspondence mode, and each matrix switching chip inputs the received HDMI sub signals into each path of RJ45 interface.

In one embodiment, the matrix switching chip is any one of Crosspoint matrix switching chip, video matrix switching chip, and FPGA chip.

In one embodiment, the matrix switching module has a plurality of different types of control interfaces, and the first main control chip is used for connecting any one of the control interfaces.

In one embodiment, a network transformer is disposed between each matrix switching chip and the RJ45 interface, and the network transformer is used to isolate the matrix switching chip from the RJ45 interface.

In one embodiment, the video matrix switcher further includes a power conversion circuit connected to the network transformer, the power conversion circuit being configured to level convert a control signal;

the power supply conversion circuit is electrically connected with the first main control chip.

In one embodiment, the video matrix switcher further includes a second main control chip, and the power conversion circuit is electrically connected to the second main control chip.

The application also provides a video matrix switching system, which comprises the video matrix switcher and the liquid crystal display device according to any one of the embodiments; the liquid crystal display device comprises a plurality of liquid crystal display screens and a plurality of liquid crystal splice plates corresponding to the liquid crystal display screens, wherein a signal input interface is arranged on the liquid crystal splice plates, and the signal input interface is a network interface; the video matrix switcher is used for being connected with the signal input interfaces of the liquid crystal display devices through a plurality of video source output interfaces.

The video matrix switcher and the video matrix switching system provided by the application have the beneficial effects that: compared with the prior art, the matrix switching module can communicate different paths of video source input interfaces with different paths of video source output interfaces, the video source output interfaces are network interfaces, the matrix switching module is connected with the conversion module, video source data can be subjected to bandwidth compression through the conversion module, so that the transmission rate of the video source data is reduced, the lower the transmission rate of the video source data is, the higher the anti-interference degree of a video source signal is, the smaller the influence caused by the loss of long-distance transmission of the video source signal is, and the longer the transmission distance of the video source data from the video source output interfaces to video receiving equipment is realized.

Drawings

Fig. 1 is a schematic diagram of a video matrix switcher according to an embodiment of the present application;

Fig. 2 is a schematic diagram of a video matrix switcher according to an embodiment of the present application;

fig. 3 is a schematic diagram of a video matrix switcher according to an embodiment of the present application;

Fig. 4 is a schematic diagram of a video matrix switcher according to an embodiment of the present application;

Fig. 5 is a schematic diagram of a video matrix switcher according to an embodiment of the present application;

Fig. 6 is a schematic diagram of an RJ45 video source output interface of a video matrix switcher according to an embodiment of the present application for transmitting UART signals;

fig. 7 is a schematic diagram two of an RJ45 video source output interface of a video matrix switcher according to an embodiment of the present application for transmitting UART signals;

fig. 8 is a schematic structural diagram of a video matrix switching system according to an embodiment of the present application.

Reference numerals: 100. a video receiving device; 101. a net wire; 102. a signal input interface; 200. a video matrix switcher;

1. An HDMI interface; 2. an RJ45 interface;

3. A matrix switching unit; 31. a matrix switching module; 310. a matrix switching chip; 32. a conversion module;

4. a first main control chip; 5. a network transformer; 6. a power supply conversion circuit; 7. and the second main control chip.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.

The embodiment of the application provides a video matrix switcher and a video matrix switching system, which solve the problem that the transmission distance of video signals is limited because the existing video matrix switcher only supports the input and output of a video source of an HDMI interface.

Referring to fig. 1, a video matrix switcher 200 provided in an embodiment of the present application includes a plurality of video source input interfaces, a plurality of video source output interfaces, a matrix switching unit 3, and a first main control chip 4; the video source output interface is a network interface and is used for connecting the video receiving device 100; the matrix switching unit 3 is connected between the multiple paths of video source input interfaces and the multiple paths of video source output interfaces, the matrix switching unit 3 comprises a matrix switching module 31 and a conversion module 32 which are connected with each other, the matrix switching module 31 is used for communicating different paths of video source input interfaces with different paths of video source output interfaces, and the conversion module 32 is used for carrying out bandwidth compression on video source data; the first main control chip 4 is connected to the matrix switching module 31.

The video source input interface may be HDMI interface 1, DVI interface, DP interface, CVBS interface, SDI interface, etc., and the video source input interface mainly receives video sources from other video source devices such as PC computers, video cameras, etc., and the video receiving device 100 connected to the video source output interface may be a display device, such as a liquid crystal display device, and is mainly used for displaying received video source data.

In the embodiment of the present application, the matrix switching unit 3 includes a matrix switching module 31 and a conversion module 32 that are connected to each other, and the video source data can be bandwidth-compressed by the conversion module 32, so that the transmission rate of the video source data can be reduced, the lower the transmission rate of the video source data is, the greater the anti-interference degree of the video source signal is, the smaller the influence caused by the loss of the long-distance transmission of the video source signal is, so that the longer distance can be transmitted, and meanwhile, the video source output interface is set as a network interface, so that the video source output interface can be connected with the network cable 101 to transmit the video source data; in summary, the video source data after the bandwidth compression is output from the network interface and transmitted through the network cable 101, so that the transmission distance of the video source data can be greatly prolonged.

The video matrix switcher 200 of the present application can realize any switching between multiple video source input interfaces and multiple video source output interfaces, specifically, any one video source input interface can be switched to any one video source output interface, or any one video source input interface can be switched to multiple video source output interfaces to output simultaneously.

In the embodiment of the application, the types of the video source input interfaces can be various, and the video source output interfaces are network interfaces, and the network interfaces can also be various, such as RJ45 interfaces, optical fiber interfaces and the like. The present application reduces the transmission rate of the video source data by connecting the conversion module 32 to the matrix switching module 31 and performing bandwidth compression on the video source data, thereby extending the transmission distance of the video source data, however, the connection sequence between the conversion module 32 and the matrix switching module 31 is not particularly limited.

Specifically, in the embodiment of the present application, the video source input interface is taken as the HDMI interface 1, the video source output interface is taken as the RJ45 interface 2, and the conversion module 32 is connected to the front of the matrix switching module 31, that is, connected between the video source input interface and the matrix switching module 31, for example, to explain the switching principle of the video matrix switch 200.

Referring to fig. 1, the video source input interface is an HDMI interface 1; the video source output interface is an RJ45 interface 2, and the RJ45 interface 2 is used for connecting the video receiving device 100 through the network cable 101. Compared with the prior art that the video source output interface is the HDMI interface 1 and data is transmitted through an HDMI cable, the RJ45 interface 2 is connected with the video receiving device 100 through the network cable 101, the embodiment of the application adopts the network cable 101 to transmit the data, so that the distance for transmitting the video data is longer, the cost of the network cable 101 is lower than that of the HDMI cable, and the manufacturing cost of the video matrix switcher 200 is greatly saved; in addition, the end portion of the network cable 101 generally has a locking design when in use, so that the network cable 101 can be locked through the locking interface when the network cable 101 is connected with the RJ45 interface 2 and the video receiving device 100, the network cable 101 is prevented from being separated, and the video data transmission is safer and more stable.

In some embodiments, referring to fig. 1-4, matrix switch module 31 has an input and an output; each path of HDMI 1 is connected with a conversion module 32, the conversion module 32 is connected with an input end, and each path of RJ45 interface 2 is connected with an output end. Therefore, the video source data received by the video source input interface is subjected to bandwidth compression through the conversion module 32, then enters the matrix switching module 31 and is switched to any path of video source output interface for output, and in the process, the video source data received by the video source input interface is subjected to bandwidth compression without transmission, so that the compressed video source data can be kept complete, the situation that the video source data are subjected to loss after being transmitted for a certain distance and then are subjected to compression is avoided, the compressed video source data are damaged, and the normal playing of the video source data is influenced.

In some embodiments, referring to fig. 2-4, the matrix switching module 31 includes at least one matrix switching chip 310, where each HDMI signal received by the HDMI interface 1 is divided into at least one group of HDMI sub-signals; at least one group of HDMI sub-signals are respectively input into at least one matrix switching chip 310 through the conversion module 32 in a one-to-one correspondence manner, and each matrix switching chip 310 inputs the received HDMI sub-signals into each path of RJ45 interface 2.

The industry standard of the HDMI signal received by the HDMI interface 1 is TMDS signal protocol, which is composed of 4 differential signals, namely 3 data lines and 1 clock line, and can be replaced by CH0, CH1, CH2, and CH 3.

The number of matrix switch chips 310 included in the matrix switch module 31 may be determined by the processing power of the matrix switch chips 310 and the number of video source input interfaces and video source output interfaces. The number of the video source input interfaces and the number of the video source output interfaces may be the same or different, for example, if the number of the video source input interfaces and the number of the video source output interfaces are the same, the processing capability of the matrix switching chip 310, that is, when the matrix switching chip 310 has 16 paths of data processing channels, the number of the HDMI interfaces 1 is multiplied by the number of the paths 4 of the HDMI signals received by the HDMI interfaces 1, and divided by the number of the data processing channels 16 of the matrix switching chip 310, that is, the number of the matrix switching chip 310. If the number of the video source input interfaces is different from the number of the video source output interfaces, when the matrix switching chip 310 has 16 paths of data processing channels, the number of the larger one of the HDMI interfaces and the RJ45 interfaces is multiplied by the number of the paths 4 of the HDMI signals received by the HDMI interface 1, and divided by the number of the data processing channels 16 of the matrix switching chip 310, that is, the number of the matrix switching chips 310. Specifically, the number of the video source input interfaces and the number of the video source output interfaces are not fixed, and can be 4 paths, 8 paths and 16 paths according to actual needs, and the embodiment of the application is not particularly limited. If more video source input interfaces and more video source output interfaces are required, then a matrix switch chip 310 with more processing power, i.e. a matrix switch chip 310 with a data processing channel greater than 16, may be selected.

In the embodiment of the present application, the matrix switching chip 310 is any one of Crosspoint matrix switching chips, video matrix switching chips and FPGA chips.

The Crosspoint matrix switching chip is a single-channel switching chip, and the video matrix switching chip is a matrix switching chip capable of supporting a video interface.

In some embodiments, referring to fig. 2, the number of multiplexed HDMI interfaces 1 and multiplexed RJ45 interfaces 2 is four; the matrix switching module 31 includes a matrix switching chip 310, the HDMI signal received by each path of HDMI interface 1 is input to the matrix switching chip 310 through the conversion module 32, and the matrix switching chip 310 inputs the received HDMI signal to each path of RJ45 interface 2.

Specifically, the number of HDMI interfaces 1 and RJ45 interfaces 2 is four, and the HDMI signals received by HDMI interface 1 include 4 differential signals, and the matrix switching chip 310 has 16 data processing channels, so that one matrix switching chip 310 is correspondingly set. The HDMI signal received by the HDMI interface 1 passes through the conversion module 32, the HDMI signal is compressed by the conversion module 32 to reduce the bandwidth and transmission rate of the HDMI signal, the compressed HDMI signal includes 4 paths of differential signals, all HDMI signals are input into the matrix switching chip 310, the matrix switching chip 310 will input the HDMI signal into each path of RJ45 interface 2, and thus, any path of HDMI interface 1 and any path of RJ45 interface 2 are connected, and the RJ45 interface 2 can output a complete HDMI signal including 4 paths of differential signals.

In some embodiments, referring to fig. 3, the number of multiplexed HDMI interfaces 1 and multiplexed RJ45 interfaces 2 is eight; the matrix switching module 31 includes two matrix switching chips 310, and each path of HDMI signal received by the HDMI interface 1 is divided into two groups of HDMI sub-signals; the two groups of HDMI sub-signals are respectively input into two matrix switching chips 310 through the conversion module 32 in a one-to-one correspondence manner, and each matrix switching chip 310 inputs the received HDMI sub-signal into each path of RJ45 interface 2.

Specifically, the HDMI interface 1 and the RJ45 interface 2 are eight paths, and the HDMI signal received by the HDMI interface 1 includes 4 paths of differential signals, and the matrix switching chip 310 has 16 paths of data processing channels, so two matrix switching chips 310 are required to be correspondingly arranged. The HDMI signal received by the HDMI interface 1 is first compressed by the conversion module 32 to reduce the bandwidth and transmission rate of the HDMI signal, the compressed HDMI signal is divided into two groups of HDMI sub-signals, each group of HDMI sub-signals includes 2 paths of differential signals, one group of HDMI sub-signals is input into the first matrix switching chip 310, the other group of HDMI sub-signals is input into the second matrix switching chip 310, the first matrix switching chip 310 will input one group of received HDMI sub-signals into each path of RJ45 interface 2, the second matrix switching chip 310 will input the other group of received HDMI sub-signals into each path of RJ45 interface 2, thus connecting any path of HDMI interface 1 and any path of RJ45 interface 2, and all the RJ45 interfaces 2 can output any path of HDMI signals including 4 paths of differential signals completely.

It should be noted that, the compressed HDMI signal includes 4 differential signals, the 4 differential signals are divided into two groups of HDMI sub-signals, each group of HDMI sub-signals may include any 2 differential signals, that is, any 2 differential signals in the 4 differential signals are divided into one group, and the remaining 2 differential signals are divided into one group, each group is referred to as an HDMI sub-signal. In addition, the order of accessing the two sets of HDMI sub-signals of the two matrix switching chips 310 is not particularly limited, and any one set of HDMI sub-signals may be accessed to any one matrix switching chip 310.

In some embodiments, referring to fig. 4, the number of multiplexed HDMI interfaces 1 and multiplexed RJ45 interfaces 2 is sixteen; the matrix switching module 31 includes four matrix switching chips 310, and each path of HDMI signal received by the HDMI interface 1 is divided into four groups of HDMI sub-signals; the four groups of HDMI sub-signals are respectively input into four matrix switching chips 310 through the conversion module 32 in a one-to-one correspondence manner, and each matrix switching chip 310 inputs the received HDMI sub-signals into each path of RJ45 interface 2.

Specifically, the number of HDMI interfaces 1 and RJ45 interfaces 2 is sixteen, and the HDMI signals received by the HDMI interfaces 1 include 4 differential signals, and the matrix switching chip 310 has 16 data processing channels, so four matrix switching chips 310 are required to be correspondingly arranged. The HDMI signal received by the HDMI interface 1 is first compressed by the conversion module 32 to reduce the bandwidth and transmission rate of the HDMI signal, the compressed HDMI signal is divided into four groups of HDMI sub-signals, each group of HDMI sub-signals includes 1 path of differential signal, the first group of HDMI sub-signals are input into the first matrix switching chip 310, the second group of HDMI sub-signals are input into the second matrix switching chip 310, the third group of HDMI sub-signals are input into the third matrix switching chip 310, the fourth group of HDMI sub-signals are input into the fourth matrix switching chip 310, the four matrix switching chips 310 respectively input a group of HDMI sub-signals received by the four matrix switching chips into each path of RJ45 interface 2, so that any path of HDMI interface 1 and any path of RJ45 interface 2 are connected, and all RJ45 interfaces 2 can output any path of HDMI signals including 4 paths of differential signals completely.

It should be noted that the compressed HDMI signal includes 4 differential signals, and the 4 differential signals are divided into four groups of HDMI sub-signals, each group of HDMI sub-signals includes 1 differential signal. In addition, the order of accessing the four sets of HDMI sub-signals of the four matrix switching chips 310 is not particularly limited, and any set of HDMI sub-signals may be accessed to any one matrix switching chip 310.

In some embodiments, the matrix switching module 31 has a plurality of different types of control interfaces, and the first main control chip 4 is used to connect any one of the control interfaces. I.e. the matrix switching chip 310 has a control interface, the first main control chip 4 is connected with the control interface of each matrix switching chip 310, the switching function from any video source input interface to any video source output interface is realized by controlling all matrix switching chips 310 to switch channels simultaneously.

Specifically, the matrix switching module 31 may have an I2C interface, an SPI interface, a UART interface, etc. at the same time, and the first main control chip 4 may be, but not limited to, a CPU, an MCU control chip, or an ARM, etc., as long as the requirement of controlling the matrix switching chip 310 to perform channel switching is met, and the CPU or the MCU control chip may optionally gate the switching from the input channel to the output channel of the matrix switching chip 310 through the interface such as I2C, SPI, UART.

In some embodiments, instead of the conversion module 32 being arranged between the video source input interface and the matrix switching module 31, the conversion module 32 may also be connected behind the matrix switching module 31, i.e. between the matrix switching module 31 and the video source output interface. Specifically, referring to fig. 5, the matrix switching module 31 includes at least one matrix switching chip 310, and each HDMI signal received by the HDMI interface 1 is divided into at least one group of HDMI sub-signals; at least one group of HDMI sub-signals are respectively input into at least one matrix switching chip 310 in a one-to-one correspondence manner, and each matrix switching chip 310 inputs the received HDMI sub-signals into each path of RJ45 interface 2 through a conversion module 32.

Taking the example that the number of the video source input interfaces and the number of the video source output interfaces are four, referring to fig. 5, the HDMI signals received by each path of HDMI interface 1 are input to the matrix switching chip 310, the matrix switching chip 310 inputs the received HDMI signals to each path of RJ45 interface 2 through the conversion modules 32, and the number of the conversion modules 32 is the same as the number of the RJ45 interfaces 2.

In some embodiments, referring to fig. 6, a network transformer 5 is disposed between each matrix switching chip 310 and the RJ45 interface 2, and the network transformer 5 is used to isolate the matrix switching chip 310 from the RJ45 interface 2. Because the RJ45 interface 2 is a network interface and is connected with the network cable 101 to transmit video source data, a network transformer 5 is arranged between each matrix switching chip 310 and the RJ45 interface 2, and the matrix switching chips 310 and the RJ45 interface 2 can be isolated through the network transformer 5 so as to protect the matrix switching chips 310 from being damaged due to abnormal failure of the data passing through the long-distance network cable 101, and meanwhile, the network transformer 5 is adopted to play a role in transmitting video source data at a longer distance.

In some embodiments, referring to fig. 6, the video matrix switcher 200 further includes a power conversion circuit 6, the power conversion circuit 6 is connected to the network transformer 5, and the power conversion circuit 6 is configured to level convert the control signal; the power conversion circuit 6 is electrically connected with the first main control chip 4.

Specifically, after the data line of the RJ45 interface 2 is connected to the network transformer 5, the common mode voltage of the video source signal output by the RJ45 interface 2 is connected through the common mode tap of the secondary side (one end connected with the RJ45 interface 2) of the network transformer 5, the common mode voltage on the center tap of the network transformer 5 is converted into a UART serial port signal with TTL standard through the power conversion circuit 6, and the UART serial port signal is connected to the first main control chip 4, so that the transmission of control commands such as UART serial port signals is realized by adopting the RJ45 interface 2. Through the above arrangement, the RJ45 interface 2 can also realize UART serial port communication with the first main control chip 4 while transmitting video source data, so as to transmit control signals such as UART serial port signals, or other control signals customized by clients.

The UART may transmit some basic signals such as EDID data, screen configuration parameters, etc. The power conversion circuit 6 can be a circuit built by adopting such devices as a triode, a MOS tube and a resistor, and is mainly used for converting the CTC/CTD signal of the center tap of the network transformer 5 into a UART_TX/RX signal in a standard TTL format after level conversion, and then transmitting and receiving serial data to the first main control chip 4.

In the embodiment of the present application, the power conversion circuit 6 may be directly connected to the first main control chip 4, or the second main control chip 7 may be separately connected to the power conversion circuit 6. In some embodiments, referring to fig. 7, the video matrix switcher 200 further includes a second master control chip 7, and the power conversion circuit 6 is electrically connected to the second master control chip 7. Therefore, the first main control chip 4 is used for controlling the matrix switching module 31, the second main control chip 7 is used for realizing UART serial communication with the RJ45 interface 2 so as to transmit control signals such as UART serial signals or other control signals customized by clients, and the two main control chips independently operate without interference.

Referring to fig. 8, the present application also provides a video matrix switching system, including the video matrix switcher 200 and the liquid crystal display device according to any one of the above embodiments; the liquid crystal display device comprises a plurality of liquid crystal display screens and a plurality of liquid crystal splice plates corresponding to the plurality of liquid crystal display screens, wherein a signal input interface 102 is arranged on the liquid crystal splice plates, and the signal input interface 102 is a network interface; the video matrix switcher 200 is used for connecting with the signal input interfaces 102 of a plurality of liquid crystal display devices through a multi-path video source output interface.

The liquid crystal display device is the video receiving device 100 connected to the video source output interface. The video matrix switching system applies the video matrix switcher 200 of the above embodiment, and can enable the multiple video source input interfaces and multiple video source output interfaces to be switched and communicated at will, so that video source data received by the video source input interfaces can be displayed on any one or more liquid crystal display devices, and display requirements of different video source data in different occasions are met.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. A video matrix switcher, comprising:

A multi-channel video source input interface;

the multi-channel video source output interface is a network interface and is used for being connected with video receiving equipment (100);

The matrix switching unit (3) is connected between a plurality of paths of video source input interfaces and a plurality of paths of video source output interfaces, the matrix switching unit (3) comprises a matrix switching module (31) and a conversion module (32) which are connected with each other, the matrix switching module (31) is used for communicating different paths of video source input interfaces with different paths of video source output interfaces, and the conversion module (32) is used for carrying out bandwidth compression on video source data;

The first main control chip (4) is connected with the matrix switching module (31).

2. The video matrix switcher of claim 1, wherein,

The video source input interface is an HDMI interface (1);

The video source output interface is an RJ45 interface (2), and the RJ45 interface (2) is used for being connected with the video receiving equipment (100) through a network cable (101).

3. The video matrix switcher of claim 2, wherein,

The matrix switching module (31) has an input and an output;

Each path of HDMI interface (1) is connected with one conversion module (32), the conversion module (32) is connected with the input end, and each path of RJ45 interface (2) is connected with the output end.

4. The video matrix switcher of claim 3, wherein,

The matrix switching module (31) comprises at least one matrix switching chip (310), and each path of HDMI signal received by the HDMI interface (1) is divided into at least one group of HDMI sub-signals;

at least one group of HDMI sub-signals are respectively input into at least one matrix switching chip (310) through the conversion module (32) in a one-to-one correspondence mode, and each matrix switching chip (310) inputs the received HDMI sub-signals into each path of RJ45 interface (2).

5. The video matrix switcher of claim 4, wherein,

The number of the HDMI interfaces (1) and the RJ45 interfaces (2) is four;

The matrix switching module (31) comprises a matrix switching chip (310), HDMI signals received by each path of HDMI interface (1) are input into the matrix switching chip (310) through the conversion module (32), and the matrix switching chip (310) inputs the received HDMI signals into each path of RJ45 interface (2).

6. The video matrix switcher of claim 4, wherein,

The number of the HDMI interfaces (1) and the RJ45 interfaces (2) is eight;

the matrix switching module (31) comprises two matrix switching chips (310), and each path of HDMI signals received by the HDMI interface (1) are divided into two groups of HDMI sub-signals;

The two groups of HDMI sub-signals are respectively input into two matrix switching chips (310) through the conversion module (32) in a one-to-one correspondence mode, and each matrix switching chip (310) inputs the received HDMI sub-signals into each path of RJ45 interface (2).

7. The video matrix switcher of claim 4, wherein,

Sixteen paths of HDMI interfaces (1) and sixteen paths of RJ45 interfaces (2) are arranged;

The matrix switching module (31) comprises four matrix switching chips (310), and each path of HDMI signals received by the HDMI interface (1) are divided into four groups of HDMI sub-signals;

four groups of HDMI sub-signals are respectively input into four matrix switching chips (310) through the conversion module (32) in a one-to-one correspondence mode, and each matrix switching chip (310) inputs the received HDMI sub-signals into each path of RJ45 interface (2).

8. The video matrix switcher of any of claims 4-7, wherein,

The matrix switching chip (310) is any one of Crosspoint matrix switching chip, video matrix switching chip and FPGA chip;

And/or the matrix switching module (31) is provided with a plurality of different types of control interfaces, and the first main control chip (4) is used for connecting any one of the control interfaces.

9. The video matrix switcher of any of claims 4-7, wherein,

A network transformer (5) is arranged between each matrix switching chip (310) and the RJ45 interface (2), and the network transformer (5) is used for isolating the matrix switching chips (310) and the RJ45 interfaces (2).

10. The video matrix switcher of claim 9, further comprising:

A power conversion circuit (6) connected to the network transformer (5), the power conversion circuit (6) being configured to level-convert a control signal;

The power supply conversion circuit (6) is electrically connected with the first main control chip (4);

Or the video matrix switcher further comprises a second main control chip (7), and the power supply conversion circuit (6) is electrically connected with the second main control chip (7).

11. A video matrix switching system, comprising:

the video matrix switcher (200) of any of claims 1-10;

The liquid crystal display device comprises a plurality of liquid crystal display screens and a plurality of liquid crystal splice plates corresponding to the liquid crystal display screens, wherein a signal input interface (102) is arranged on the liquid crystal splice plates, and the signal input interface (102) is a network interface;

The video matrix switcher (200) is used for connecting with the signal input interfaces (102) of a plurality of the liquid crystal display devices through a plurality of the video source output interfaces.