An interactive hybrid optical cascade matrix

Abstract

The present invention discloses an interactive hybrid optical cascade matrix, including a signal exchange module, an optical cascade module, and a plurality of independent signal input modules and signal output modules; each signal input module includes four independent input interface conversion units, a first FPGA module, and a Serdes sending unit, wherein the first FPGA module is configured with four first cache units, a packaging unit, and four input video processing units. Each signal output module includes four independent output interface conversion units, a second FPGA module, and a Serdes receiving unit, wherein the second FPGA module is configured with four second cache units, a video unpacking unit, and four output video processing units. The present invention adopts a modular integrated design to realize long-distance bidirectional transmission of multi-channel high-definition multimedia signals, and the transmission distance is long, the signal transmission is lossless, delay-free, and the reliability is high.

Description

Technical Field

[0001] The invention relates to an interactive hybrid optical cascade matrix, belonging to the technical field of satellite communication equipment. Background Art

[0002] With the development of satellite communication technology, high-definition video signals can be transmitted through satellite channels. After the satellite ground station receives the high-definition video signal from the remote mobile station, there is a problem of how to connect with the conference high-definition video system. In the late 1980s, analog optical terminals began to be used in China, and digital optical terminals began to appear in 2001, demonstrating the process of economic development driving scientific and technological progress, and science and technology driving economic development. With the advancement of science and technology, the production cost of optical fibers has been reduced. In addition, optical fiber communication technology has obvious advantages over other communication technologies, and optical fiber communication technology has been widely used.

[0003] As a terminal device for transmitting optical signals, optical terminals are also widely used in fields such as ground connection of satellite video systems. However, the existing optical terminals have a single interface and adopt an optical composite method, which has poor image effects. The disclosed invention patent application CN2014107197792 discloses an ultra-high-speed digital signal wireless transceiver, which is composed of a transmitting terminal system and a receiving terminal system, and the transmitting terminal system and the receiving terminal system are connected through wireless communication; the transmitting terminal system and the receiving terminal system are both composed of a photoelectric conversion module, a serial-to-parallel conversion module, an FPGA digital signal processing module and a wireless communication module, so as to effectively realize the ultra-high-speed digital signal wireless transmission of devices with relative motion, reduce the processing accuracy required for the relative motion connection parts between devices, enhance the system reliability and effectively reduce the equipment cost. The device uses wireless connection, has low reliability, poor anti-interference, and low bandwidth, and is not suitable for the transmission of high-definition video signals. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an interactive hybrid optical cascade matrix, which adopts a modular integrated design, sends and receives signals through 8 optical fibers through a user-defined private communication protocol, and realizes long-distance two-way transmission of multi-channel high-definition multimedia signals.

[0005] The present invention specifically adopts the following technical solutions to solve the above technical problems:

[0006] An interactive hybrid optical cascade matrix comprises a signal exchange module, an optical cascade module, and a plurality of independent signal input modules and a plurality of signal output modules;

[0007] Among them, each signal input module includes four independent input interface conversion units, a first FPGA module, and a Serdes sending unit, wherein the first FPGA module is configured with four first cache units, a packaging unit and four input video processing units; each input interface conversion unit converts the input serial digital video signals of different interface types into parallel digital video signals of a unified format, and outputs them to the first FPGA module; each first cache unit in the first FPGA module stores the parallel digital video signals output by the input interface conversion unit connected to it, and each input video processing unit processes the parallel digital video signals stored in the first cache unit; the packaging unit packages the multi-channel parallel digital video signals processed by each input video processing unit one by one according to a private communication protocol, and packages them into high-speed serial video data and outputs them to the Serdes sending unit; the Serdes sending unit outputs the packaged high-speed serial video data to the signal exchange module; the signal exchange module switches the received high-speed serial video data to the optical cascade module; the optical cascade module converts the received high-speed serial video data into optical signals, and sends them to the optical cascade module in the external remote interactive hybrid optical cascade matrix through a single-mode optical fiber;

[0008] In addition, each signal output module includes four independent output interface conversion units, a second FPGA module, and a Serdes receiving unit, wherein the second FPGA module is configured with four second cache units, a video unpacking unit, and four output video processing units; the high-speed serial video data output by the optical cascade module is switched to the Serdes receiving unit via the signal exchange module, and the Serdes receiving unit receives the high-speed serial video data and stores it in each second cache unit in the second FPGA module; the video unpacking unit unpacks and restores the high-speed serial video data stored in the second cache unit according to a private communication protocol into multiple parallel digital video signals, and then distributes the multiple parallel digital video signals to the corresponding output video processing units according to a preset switching mechanism; each output video processing unit processes the distributed parallel digital video signal and outputs it to the corresponding output interface conversion unit after processing; each output interface conversion unit converts the parallel digital video signal output by the output video processing unit into a serial digital video signal output of a different interface type.

[0009] Furthermore, as a preferred technical solution of the present invention: the number of the signal input modules and the number of the signal output modules are no more than 8.

[0010] Furthermore, as a preferred technical solution of the present invention: the input interface conversion unit converts the parallel digital video signals in a unified format into parallel digital video signals in a BT1120 format.

[0011] Furthermore, as a preferred technical solution of the present invention: the private communication protocol adopted by the packaging and encapsulation unit includes three parts: a preamble, a command, and a message, wherein the preamble includes the video data length; the command includes control information, an ID identifier of the video signal, VS, and a transmission type; the message includes a first idle period, video data, and a second idle period.

[0012] Furthermore, as a preferred technical solution of the present invention: the packaging and encapsulation unit packages the multiple parallel digital video signals processed by each input video processing unit one by one, including marking different ID identifiers on the packet headers of each parallel digital video signal to distinguish them; and the video unpacking unit unpacks the high-speed serial video data according to the ID identifiers on the packet headers of each parallel digital video signal and restores them into multiple parallel digital video signals.

[0013] Furthermore, as a preferred technical solution of the present invention: the interface types of the input interface conversion unit and the output interface conversion unit include DVI / HDMI / CVBS interfaces.

[0014] Furthermore, as a preferred technical solution of the present invention: the interface types of the input interface conversion unit and the output interface conversion unit also include an SDI interface.

[0015] Furthermore, as a preferred technical solution of the present invention: the input video processing unit processes the parallel digital video signals stored in the first cache unit, including performing color gamut conversion on the parallel digital video signals; the output video processing unit processes the allocated parallel digital video signals, including performing scaler scaling on the parallel digital video signals.

[0016] Furthermore, as a preferred technical solution of the present invention: it also includes an LED indication module, and the LED indication module is used to indicate the power supply status, the receiving and sending status of the optical cascade module, and the input signal status and the output signal status.

[0017] The present invention adopts the above technical solution to produce the following technical effects:

[0018] The interactive hybrid optical cascade matrix disclosed in the present invention realizes long-distance bidirectional transmission of multi-channel high-definition multimedia signals through integrated design. Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) The interactive hybrid optical cascade matrix of the present invention adopts an integrated design, and can be connected and communicated with an external remote interactive hybrid optical cascade matrix through 8 single-mode optical fibers. In practical application, the on-site wiring is simple, which is convenient for equipment control and cable connection, and can realize two-way transmission of multi-channel high-definition video, and the transmission distance is long, and the signal transmission is lossless, delay-free, and the reliability is very high.

[0020] 2) The present invention uses a private communication protocol to transmit video and uses a pre-set switching mechanism to distribute the output. Both the private communication protocol and the switching mechanism can be switched autonomously according to user needs.

[0021] 3) The present invention can dynamically adjust the transmission bandwidth of the video, with high security and low transmission delay; the color gamut and resolution of the video signal can be adjusted according to user needs.

[0022] 4) The signal input and output ports of the present invention include DVI / HDMI / CVBS interfaces and SDI interfaces, which have the characteristics of supporting rich interface types, a large number of interfaces, supporting full HD, and high integration; specifically, each input and output port can support video interface types such as SDI, DVI, HDMI, CVBS, and each interface can support a maximum resolution of 1080p60.

[0023] 5) The interactive hybrid optical cascade matrix of the present invention has stable performance, clear image quality, high stability, and is provided with an LED status indicator, which can intuitively display the working status of the optical terminal.

[0024] 6) The present invention can provide a solution for the connection between the satellite ground station high-definition video system and the conference high-definition video system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the composition of the interactive hybrid optical cascade matrix in an embodiment of the present invention.

[0026] Figure 2 The figure is a schematic diagram of the principle of interactive hybrid optical cascade matrix communication in an embodiment of the present invention.

[0027] Figure 3 It is a schematic diagram of the private communication protocol in the present invention.

[0028] Figure 4 The present invention is a schematic diagram of an input interface conversion unit circuit using an HDMI / DVI / CVBS interface.

[0029] Figure 5 The schematic diagram of the circuit of the input interface conversion unit using the SDI interface in the present invention.

[0030] Figure 6 It is a connection diagram of the first FPGA module and the input interface conversion unit in the present invention.

[0031] Figure 7 It is a schematic diagram of the connection between the first FPGA module and the signal exchange module in the present invention.

[0032] Figure 8 It is a circuit diagram of the optical cascade module in the present invention.

[0033] Fig. 9 It is a schematic diagram of the connection between the second FPGA module and the output interface conversion unit in the present invention.

[0034] Fig.10 This is a circuit diagram of an output interface conversion unit using an HDMI / DVI / CVBS interface in the present invention.

[0035] Fig.11 This is a circuit diagram of an output interface conversion unit using an SDI interface in the present invention. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0037] like Figure 1 As shown, the present invention relates to an interactive hybrid optical cascade matrix, which mainly includes a signal exchange module, an optical cascade module, and a plurality of independent signal input modules and a plurality of signal output modules, wherein the number of the signal input modules and the signal output modules can be expanded according to the number of signal groups; the optical cascade modules are connected and communicated with the optical cascade modules of an external remote interactive hybrid optical cascade matrix through 8 single-mode optical fibers respectively, and the remote interactive hybrid optical cascade matrix and the interactive hybrid optical cascade matrix are configured with the same private communication protocol.

[0038] Among them, Figure 2As shown, each signal input module includes four independent input interface conversion units, a first FPGA module, and a Serdes sending unit, wherein the first FPGA module is configured with four first cache units, a packaging unit, and four input video processing units; each input interface conversion unit is correspondingly connected to each first cache unit, each first cache unit is correspondingly connected to an input video processing unit, and all input video processing units are connected to the packaging unit; the packaging unit is connected to the Serdes sending unit, the Serdes sending unit is connected to the signal exchange module, and the signal exchange module is connected to the optical cascade module. Each input interface conversion unit converts the input serial digital video signals of different interface types into parallel digital video signals of a unified format and outputs them to the first FPGA module; each first cache unit in the first FPGA module stores the parallel digital video signals output by the input interface conversion unit connected thereto, and each input video processing unit processes the parallel digital video signals stored in the first cache unit; the packaging and encapsulation unit packages the multi-channel parallel digital video signals processed by each input video processing unit one by one according to a private communication protocol, and encapsulates them into high-speed serial video data and outputs them to the Serdes sending unit; the Serdes sending unit outputs the encapsulated high-speed serial video data to the signal exchange module; the signal exchange module switches the received high-speed serial video data to the optical cascade module; the optical cascade module converts the received high-speed serial video data into optical signals, and sends them to the optical cascade module in the external remote interactive hybrid optical cascade matrix through a single-mode optical fiber.

[0039] And, if Figure 2As shown, each signal output module includes four independent output interface conversion units, a second FPGA module, and a Serdes receiving unit, wherein the second FPGA module is configured with four second cache units, a video unpacking unit, and four output video processing units; the optical cascade module is connected to the signal exchange module, and the signal exchange module is connected to the Serdes receiving unit; the Serdes receiving unit is respectively connected to each second cache unit, and each second cache unit is connected to the video unpacking unit, and the video unpacking unit is connected to each output video processing unit; each output video processing unit is connected to a corresponding output interface conversion unit. The high-speed serial video data output by the optical cascade module is switched to the Serdes receiving unit via the signal exchange module. The Serdes receiving unit receives the high-speed serial video data and stores it in each second cache unit in the second FPGA module; the video unpacking unit unpacks and restores the high-speed serial video data stored in the second cache unit according to a private communication protocol into multiple parallel digital video signals, and then distributes the multiple parallel digital video signals to corresponding output video processing units according to a preset switching mechanism; each output video processing unit processes the distributed parallel digital video signal and outputs it to the corresponding output interface conversion unit after processing; each output interface conversion unit converts the parallel digital video signal output by the output video processing unit into a serial digital video signal of different interface types for output.

[0040] The input interface conversion unit completes the conversion of serial digital video signals of different interface types into parallel digital video signals with a unified format. Preferably, the parallel digital video signals with a unified format refer to parallel digital video signals in BT1120 format.

[0041] In an embodiment of the present invention, there are no more than 32 input interface conversion units, and the input interface conversion units can be configured with HDMI / DVI / CVBS interface conversion circuits and or SDI interface conversion circuits as required to convert 32 input serial digital video signals of different interface types into parallel digital video signals in BT1120 format and output them to the first FPGA module.

[0042] Among them, the interface types supported by the input interface conversion unit and the output interface conversion unit of the present invention mainly include DVI / HDMI / CVBS interface and SDI interface, which correspond to DVI / HDMI / CVBS or SDI digital video input signals respectively. The SDI interface input supports HD / 3G signal standards and automatically identifies the input format; the DVI interface supports various resolutions such as 640*480, 1024*768, 1280*720, 1920*1080, etc.; the SDI / DVI interface output supports a variety of different output resolutions.

[0043] In the present invention, the number of signal input modules and signal output modules used in the matrix does not exceed 8, so that the first FPGA module of the signal input module includes no more than 32 first cache units and no more than 32 input video processing units, that is, the number of first cache units and input video processing units is no more than 32. Each first cache unit stores the parallel digital video signal output by the corresponding input interface conversion unit. Each input video processing unit performs color gamut conversion of the parallel digital video signal in the first cache unit. Among them, the purpose of color gamut conversion is to convert videos from different input interfaces into signals of the same color gamut to facilitate subsequent processing. The packaging and encapsulation unit packages the parallel digital video signals processed by multiple input video processing units one by one, and marks different ID identifiers on the headers of each digital video signal according to the private communication protocol to distinguish them, and then encapsulates them into high-speed serial video data. The Serdes sending unit outputs the packaged high-speed serial video data to the signal exchange module.

[0044] The signal exchange module switches the received high-speed serial video data to the optical cascade module. The optical cascade module realizes the conversion function of electrical signals to optical signals, and can achieve long-distance and high-reliability transmission. Specifically, it converts the received high-speed serial video data of the electrical signal into an optical signal, and sends it to the optical cascade module in the external remote interactive hybrid optical cascade matrix through a single-mode optical fiber. In this embodiment, the single-mode optical fiber does not exceed 60Km.

[0045] The signal exchange module refers to a signal exchange module that switches the received multi-channel parallel digital signals to the output interface conversion unit of the remote interactive hybrid optical cascade matrix through switching, and can also transmit the multi-channel parallel digital video signals to the signal exchange module at the remote end of the interactive hybrid optical cascade matrix through the optical cascade module. In the embodiment, the relationship of "local input 1 to local output 1", "local input 1 to local output 32", "local input 1 to remote output 1"... "local input 1 to remote output 32" is adopted to realize the switching of the local multi-channel video signals to the local or remote output, and the remote multi-channel signals can also be switched to any local or remote output.

[0046] like Figure 3As shown, the private communication protocol adopted by the packaging unit includes three parts: a preamble, a command, and a message. The private communication protocol proposed in the present invention is used to define the content and format of data transmitted between optical cascade modules. The specific content and format of the private communication protocol can be preset according to user needs, as long as the private communication protocols configured by the interactive hybrid optical cascade matrices that communicate with each other are the same. Preferably, the protocol content includes three parts: a preamble, a command COMMAND, and a message DATA, wherein the preamble includes the length of the video data; the command includes control information, an ID identifier of the video signal, VS, and a transmission type; the message includes a first idle period, video data, and a second idle period.

[0047] like Figure 4 As shown, the input interface conversion unit converts the TMDS signal into a parallel digital video signal in BT1120 format through the HDMI / DVI / CVBS interface conversion circuit and sends it to the first FPGA module for subsequent video processing. Figure 5 As shown, the input interface conversion unit can also convert the SDI signal into a parallel digital video signal in BT1120 format through the SDI interface conversion circuit and send it to the first FPGA module. Figure 6 As shown, it is a circuit diagram of the connection between the first FPGA module and the input interface conversion unit of the present invention. Figure 7 FIG. 1 is a schematic diagram of the connection circuit between the first FPGA module and the signal exchange module of the present invention.

[0048] like Figure 8 As shown, a circuit diagram of the optical cascade module in the present invention is given. The optical cascade module realizes the conversion function of electrical signals to optical signals, and can achieve long-distance and high-reliability transmission. Specifically, it converts the optical signal sent by the optical cascade module in the external remote interactive hybrid optical cascade matrix into high-speed serial data of the electrical signal, and sends it to the second FPGA module after switching by the signal exchange module.

[0049] Since the number of signal input modules and signal output modules used in the present invention does not exceed 8, the second FPGA module includes no more than 32 second cache units and no more than 32 output video processing units, that is, the number of second cache units and output video processing units is no more than 32. The Serdes receiving unit receives the high-speed serial signal of the interactive hybrid optical cascade matrix and stores it in each second cache unit. The video unpacking unit unpacks and restores the encapsulated high-speed serial data stored in each second cache unit according to the ID identifier in the packet header of each signal, and restores it to the corresponding parallel digital video signal, and then distributes it to the corresponding output video processing unit according to the autonomously set switching mechanism. Each output video processing unit processes the allocated parallel digital video signal.

[0050] The output video processing unit processes the allocated parallel digital video signal, including scaling the parallel digital video signal by a scaler. When the number of signal output modules does not exceed 8, the output interface conversion module has no more than 32 output interface conversion units, that is, the number is no more than 32, and converts the parallel digital video signals in the BT1120 format output by each corresponding output video processing unit in the second FPGA module, and outputs the corresponding HDMI / DVI / CVBS or SDI digital video signal. It should be noted that when autonomously switching parallel digital signals, it is not limited by the interface type output by the interface conversion unit corresponding to the output video processing unit.

[0051] like Fig. 9 As shown, a schematic diagram of the circuit connection between the second FPGA module and the output interface conversion unit in the present invention is given. Fig.10 As shown in FIG. 1 , the output interface conversion unit of the present invention adopts a circuit schematic diagram of an HDMI / DVI / CVBS interface conversion circuit, which converts the parallel digital video signal in BT1120 format into a TMDS signal, and then transmits the video to the corresponding real device through the HDMI / DVI / CVBS interface. Fig.11 As shown, it is a circuit diagram of the output interface conversion unit of the present invention using an SDI interface conversion circuit, which converts the parallel digital video signal in the BT1120 format into an SDI signal, and then transmits the video to the corresponding real device through the SDI interface.

[0052] Furthermore, the present invention further comprises an LED indication module, which is connected to the first FPGA module or the second FPGA module. The LED indication module is used to indicate the power supply status, the receiving and sending status of the optical cascade module, the input signal status, and the output signal status. The LED status indication function facilitates the user to locate the fault.

[0053] Based on the above description, the working principle of the interactive hybrid optical cascade matrix disclosed in the embodiment is explained here:

[0054] As a local interactive hybrid optical cascade matrix, each input interface conversion unit receives no more than 32 channels of high-definition video to adapt to various high-definition interfaces, and is parsed into parallel digital video signals in BT1120 format by the corresponding interface conversion chip ASSP, and is provided to Xilinx FPGA1 as the first FPGA module after conversion. Each first cache unit in Xilinx FPGA1 stores the parallel digital video signals in BT1120 format respectively, and each passes through an input video processing unit for color gamut conversion and scaling processing, and then the video is synchronously and uniformly packaged and packaged into 10G signals according to a private communication protocol through a packaging unit, and then output to the signal exchange module through an internal high-speed Serdes sending unit, which switches it to the optical cascade module. The optical cascade module converts the received high-speed serial video data into an optical signal and provides it to the optical cascade module in the external remote interactive hybrid optical cascade matrix through a single-mode optical fiber.

[0055] As a remote interactive hybrid optical cascade matrix, after receiving the external high-speed serial signal 10G signal through the optical cascade module, it is switched to the Xilinx FPGA2 as the second FPGA module through the signal exchange module. The Serdes receiving unit in Xilinx FPGA2 receives the high-speed serial signal and distributes it to each second cache unit for storage. Then, the encapsulated high-speed serial video data stored in each second cache unit is re-unpacked and unpacked according to each signal through the video unpacking unit in XilinxFPGA2 and restored to the corresponding parallel digital video signal. According to the ID identifier of the packet header in the private communication protocol, no more than 32 parallel digital video signals in BT1120 format are extracted, and after timing adjustment, video processing is performed, and then after conversion, it is sent to the corresponding output interface conversion chip ASSP. Each output interface conversion unit outputs the corresponding high-definition interface video signal, and finally transmitted to the display device through the corresponding interface. As described above, the local interactive hybrid optical cascade matrix and the connected external remote interactive hybrid optical cascade matrix can communicate with each other, and the working principle is the same.

[0056] In summary, the interactive hybrid optical cascade matrix of the present invention adopts a modular integrated design, transmits and receives signals through 8 single-mode optical fibers, realizes long-distance bidirectional transmission of multi-channel high-definition multimedia signals, and has a long transmission distance, no signal transmission loss, no delay, and high reliability. It can provide a solution for the connection between the satellite ground station high-definition video system and the conference high-definition video system.

[0057] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An interactive hybrid optical cascade matrix, characterized in that: It includes a signal exchange module, an optical cascade module, and several independent signal input modules and several signal output modules; Among them, each signal input module includes four independent input interface conversion units, a first FPGA module, and a Serdes sending unit, wherein the first FPGA module is configured with four first cache units, a packaging unit and four input video processing units; each input interface conversion unit converts the input serial digital video signals of different interface types into parallel digital video signals of a unified format, and outputs them to the first FPGA module; each first cache unit in the first FPGA module stores the parallel digital video signals output by the input interface conversion unit connected to it, and each input video processing unit processes the parallel digital video signals stored in the first cache unit; the packaging unit packages the multi-channel parallel digital video signals processed by each input video processing unit one by one according to a private communication protocol, and packages them into high-speed serial video data and outputs them to the Serdes sending unit; the Serdes sending unit outputs the packaged high-speed serial video data to the signal exchange module; the signal exchange module switches the received high-speed serial video data to the optical cascade module; the optical cascade module converts the received high-speed serial video data into optical signals, and sends them to the optical cascade module in the external remote interactive hybrid optical cascade matrix through a single-mode optical fiber; And, each signal output module includes four independent output interface conversion units, a second FPGA module, and a Serdes receiving unit, wherein the second FPGA module is configured with four second cache units, a video unpacking unit, and four output video processing units; the high-speed serial video data output by the optical cascade module is switched to the Serdes receiving unit via the signal exchange module, and the Serdes receiving unit receives the high-speed serial video data and stores it in each second cache unit in the second FPGA module; the video unpacking unit unpacks and unpacks the high-speed serial video data stored in the second cache unit according to a private communication protocol and restores it into multiple parallel digital video signals, and then distributes the multiple parallel digital video signals to the corresponding output video processing units according to a preset switching mechanism; each output video processing unit processes the distributed parallel digital video signal and outputs it to the corresponding output interface conversion unit after processing; each output interface conversion unit converts the parallel digital video signal output by the output video processing unit into a serial digital video signal of different interface types for output; The packaging and encapsulation unit packages the multiple parallel digital video signals processed by each input video processing unit one by one, including marking different ID identifiers on the packet headers of each parallel digital video signal to distinguish them; and the video unpacking unit unpacks the high-speed serial video data according to the ID identifiers of the packet headers of each parallel digital video signal and restores them into multiple parallel digital video signals.

2. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: The number of the signal input modules and the number of the signal output modules shall not exceed eight.

3. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: The input interface conversion unit converts the parallel digital video signals in a unified format into parallel digital video signals in a BT1120 format.

4. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: The private communication protocol adopted by the packaging and encapsulation unit includes three parts: a preamble, a command, and a message, wherein the preamble includes the length of the video data; the command includes control information, an ID of the video signal, VS, and a transmission type; and the message includes a first idle period, video data, and a second idle period.

5. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: The interface types of the input interface conversion unit and the output interface conversion unit include DVI / HDMI / CVBS interfaces.

6. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: The interface types of the input interface conversion unit and the output interface conversion unit include SDI interfaces.

7. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: The input video processing unit processes the parallel digital video signals stored in the first cache unit, including performing color gamut conversion on the parallel digital video signals; the output video processing unit processes the allocated parallel digital video signals, including performing scaler scaling on the parallel digital video signals.

8. The interactive hybrid optical cascade matrix according to claim 1, characterized in that: It also includes an LED indication module, which is used to indicate the power supply status, the receiving and sending status of the optical cascade module, and the input signal status and output signal status.

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