CN112261334A

CN112261334A - Transmission method and system supporting HDMI2.1 signal single-channel input and multi-channel output

Info

Publication number: CN112261334A
Application number: CN202011129454.0A
Authority: CN
Inventors: 彭辉; 龙仕强
Original assignee: Guangdong Bohua Ultra Hd Innovation Center Co Ltd
Current assignee: Guangdong Bohua Ultra Hd Innovation Center Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-01-22
Anticipated expiration: 2040-10-21
Also published as: CN112261334B

Abstract

The invention belongs to the technical field of communication, and discloses a transmission method, a system, equipment and a storage medium supporting single-channel input and multi-channel output of HDMI2.1 signals, wherein first equipment collects one channel of HDMI signals, converts TMDS signals in the HDMI into optical signals, and converts one channel of optical signals into multi-channel optical signals; the first equipment MCU controller respectively completes FRL interaction with the HDMI display equipment and the HDMI signal source; the method comprises the steps that a first device calls output ports of a plurality of ultra-High Definition Multimedia Interfaces (HDMI) to transmit a plurality of paths of photoelectric signals to a second device; the second equipment converts the optical signal of each path of HDMI interface into an electric signal and calls an output interface of the HDMI to output a standard HDMI signal. The transmission method supporting single-path input and multi-path output of the HDMI2.1 signals solves the problems that a traditional HDMI interface cannot transmit multi-path 8k resolution videos in a one-to-many mode and long-distance transmission is not achieved.

Description

Transmission method and system supporting HDMI2.1 signal single-channel input and multi-channel output

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a transmission method and a transmission system supporting single-channel input and multi-channel output of an HDMI2.1 signal.

Background

At present, with the development of ultra high definition industry, 8K technology has become mature, and besides 5G is used for transmission of 8K video, HDMI is the most common one. HDMI2.1 is the HDMI standard that is newly introduced by HDMI. The standard video transmission speed is up to 48Gbps, the video bandwidth is several times higher than 18Gbps of HDMI2.0, 8k transmission is comprehensively supported, products carrying new functions of HDMI2.1 are gradually released in the next several years, and existing HDMI1.4 and HDMI2.0 products are gradually eliminated.

The existing HDMI one-to-many transmission is developed on the basis of HDMI1.4 or HDMI2.0, can only support the resolution signal transmission to the maximum 4K60HZ, and cannot meet the requirement of the current market for the ultra high definition 8K60 HZ.

Because the transmission distance of a common HDMI cable is limited, the common HDMI cable cannot meet the requirements when scenes needing long-distance transmission such as shopping malls, conferences and monitoring are monitored, in the current implementation mode, HDMI signals are amplified to prolong the transmission distance of the HDMI signals or are transmitted in an optical fiber form, the HDMI signals have the problem of signal attenuation, the HDMI signals have too high cost and complex structure, and the HDMI cable is not an optimal selection scheme for transmission within 300 meters generally. Therefore, a new transmission method supporting HDMI2.1 signal mimo is needed.

Through the above analysis, the problems and defects of the prior art are as follows:

(1) the existing HDMI one-to-many transmission can only support the transmission of resolution signals up to 4K60HZ, and cannot meet the requirement of the current market for ultra high definition 8K60 HZ.

(2) The common HDMI cable has a limited transmission distance, and cannot meet the requirements for scenes needing long-distance transmission, such as shopping malls, conferences and monitoring.

(3) In the current implementation mode, the HDMI signals are amplified to prolong the transmission distance of the HDMI signals or the HDMI signals are transmitted in an optical fiber form, the HDMI signals have the problem of signal attenuation, and the HDMI signals have high cost and complex structure, so that the HDMI signals are not the optimal selection scheme for transmission within 300 meters generally.

The difficulty in solving the above problems and defects is: aiming at the problem that the existing HDMI one-to-many transmission only supports 4K60HZ, due to the fact that an HDMI1.4 or HDMI2.0 protocol is adopted, a TMDS 3Channel mode is fixedly used for a data transmission Channel, the maximum transmission bit rate only supports 18Gbps and cannot meet 8K60HZ video transmission, an HDMI source end and a display end do not have an FRL interaction process, the HDMI source end only needs to obtain EDID of the HDMI display end, therefore, the interaction flow needs to be redesigned to support 8K, the FRL mode is supported, and software and hardware need to be redesigned. Aiming at the problems that the existing HDMI transmission adopts the signal amplifier to prolong the transmission distance, the method can bring signal attenuation, the signal stability can be improved by increasing the number of the signal amplifiers, the cost is increased along with the increase of the signal amplifiers, and if the signal is interrupted, the problem of which amplifier appears is difficult to be solved, and the positioning and debugging are inconvenient. For the all-fiber transmission form, long-distance transmission can be realized, but each transmitting end and each receiving end need to add a plurality of photoelectric conversion or electro-optical conversion modules to transmit control signals, and since the control signals need to be communicated in two directions, each photoelectric conversion or electro-optical conversion module needs to have a function of receiving/transmitting signals, the device structure is complicated, and the cost is increased greatly.

The significance of solving the problems and the defects is as follows: because 8K is popularizing at present, a plurality of videos are required to be transmitted remotely under large-screen scenes such as markets, meetings, monitoring and the like, the transmission of 8K60HZ is not supported in the prior art, the realization cost in transmission is higher or the product stability is poor, a scheme is urgently needed, the one-to-many output of 8K60HZ is supported, the product structure and cost can be simplified as far as possible, the remote transmission is realized, and the follow-up ultra high definition development trend is met.

Disclosure of Invention

The invention provides a transmission method, a system, equipment and a storage medium for single-channel input and multi-channel output, and particularly relates to a transmission method for supporting single-channel input and multi-channel output of HDMI2.1 signals.

The invention is realized in such a way that a transmission method supporting single-channel input and multi-channel output of HDMI2.1 signals comprises the following steps:

firstly, a first device collects one path of HDMI signals;

step two, the first equipment converts the TMDS signals in the HDMI into optical signals;

step three, the first equipment converts one path of optical signal into a plurality of paths of optical signals;

step four, the first equipment MCU controller respectively completes FRL interaction with the HDMI display equipment and the HDMI signal source;

fifthly, the first equipment calls a plurality of output ports of the HDMI to transmit the plurality of paths of photoelectric signals to the second equipment;

step six, the second device converts the optical signal of each HDMI interface into an electrical signal (the electrical signal refers to converting the optical signal into the electrical signal, the electrical signal refers to a TMDS signal, the standard HDMI signal contains the TMDS signal and DDC, Utility, HPD, CEC, 5V power signals, and because the other 5 paths originally belong to the electrical signal, the other 5 paths are directly integrated with the converted TMDS electrical signal to output into an HDMI standard signal);

and step seven, the second equipment calls an output interface of the ultra-high-definition multimedia interface HDMI to output a standard HDMI signal.

Further, in the first step, the HDMI signal includes HDMI1.4, HDMI2.0, and HDMI 2.1.

Further, in the first step, the acquiring, by the first device, a path of HDMI signal includes:

(1) calling an electro-optical conversion unit to receive a TMDS signal in the HDMI input interface;

(2) and the calling MCU control unit receives DDC, Utility, HPD, CEC and 5V power supply signals in the HDMI input interface.

Further, in step two, the converting, by the first device, the TMDS signal in the HDMI into an optical signal includes:

calling the first equipment electro-optical conversion unit to convert the input TMDS electric signal into an optical signal; the input TMDS electric signals comprise four signals of Channel0, Channel1, Channel2 and Channel3, and 4 optical fiber signals are output after electro-optical conversion.

Further, in step three, the converting, by the first device, one optical signal into multiple optical signals includes:

and calling the first equipment optical splitter unit to convert one input TMDS optical signal into a plurality of TMDS optical signals, wherein the plurality of TMDS optical signals are not limited to only 4 channels.

Further, in step four, the first device MCU controller completes FRL interaction with the HDMI display device and the HDMI signal source, respectively, including:

(1) the MCU controller provides a plurality of groups of control signals for output, each group of control signals comprises five signals of DDC, CEC, Utility, 5V power supply and HPD and is connected with second equipment, and the MCU controller reads EDID information of the multi-channel HDMI display equipment through the DDC signals and stores the EDID to the local;

(2) the MCU and the multi-path HDMI display equipment complete the SCDC read-write interaction and the FRL tracing process, the maximum audio and video transmission rate and the transmission mode supported by each path of equipment are obtained, if the tracing is successful, the FRL mode can be adopted to transmit data, the mode is a data transmission mode specific to HDMI2.1, if the tracing is failed, the TMDS mode is adopted to transmit data, and at the moment, TMDS channel3 is used as a clock signal;

(3) after the MCU controller finishes interaction with the HDMI display equipment, FRL training is carried out on the highest resolution information in the public resolution supported by the multi-path HDMI display equipment and the HDMI signal source end, wherein the MCU controller signal input interface contains DDC, CEC, utilization, HPD and 5V power signals and directly receives signals from the HDMI signal source.

Further, in the fifth step, the first device calls a plurality of output ports of the HDMI to transmit multiple optical signals to the second device, the output port of each HDMI includes four optical signals Channel0, Channel1, Channel2, and Channel3, and the five electrical signals include DDC, CEC, Utility, HPD, and 5V power signals. The first device output signal supports the HDMI2.1 protocol and is compatible with HDMI1.4 and HDMI 2.0.

Further, in the fifth step, the HDMI output port of the second device is connected to a display device.

Further, in step six, the second device converts the optical signal of each HDMI interface into an electrical signal, and includes:

and calling the second equipment photoelectric conversion unit to convert the received TMDS optical signal into an electric signal.

Further, in the seventh step, the step of the second device invoking an output interface of the HDMI to output a standard HDMI signal includes:

and calling the HDMI output interface of the ultra-high-definition multimedia interface of the second equipment to output signals conforming to the HDMI standard, wherein the signals comprise a TMDS channel, a DDC channel, a CEC channel, an HPD channel, a 5v power channel and a Utility channel.

Another object of the present invention is to provide a transmission system supporting HDMI2.1 mimo, which applies the transmission method supporting HDMI2.1 mimo, wherein the transmission system supporting HDMI2.1 mimo comprises:

the device comprises a first device, an electro-optical conversion unit, a light splitter unit, an MCU control unit, an ultra-high definition multimedia interface, a second device, an HDMI display device, an HDMI signal source, an HDMI input interface and an HDMI output interface.

The first equipment comprises an electro-optical conversion module, an MCU controller and a light splitter and is used for acquiring one path of HDMI signals, converting TMDS signals in the HDMI into optical signals, converting one path of optical signals into multiple paths of optical signals and calling output ports of the HDMI signals to transmit the multiple paths of optical signals to the second equipment; the output signal of the first device supports an HDMI2.1 protocol and is compatible with HDMI1.4 and HDMI 2.0;

the MCU controller is used for providing a plurality of groups of control signal outputs and finishing FRL interaction with the HDMI display equipment and the HDMI signal source respectively; the MCU controller signal input interface comprises DDC, CEC, Utility, HPD and 5V power supply signals;

the electro-optical conversion unit is used for converting the input TMDS electric signal into an optical signal;

the optical splitter unit is used for converting one input TMDS optical signal into a plurality of TMDS optical signals;

the electro-optical conversion unit is used for receiving the TMDS signals in the HDMI input interface and converting the input TMDS electric signals into optical signals;

the ultra-high definition multimedia interface is used for transmitting the multi-channel photoelectric signals to the second equipment; the output port of each ultra high definition multimedia interface HDMI comprises four optical signals Channel0, Channel1, Channel2 and Channel3, and five electric signals DDC, CEC, Utility, HPD and 5V power signals;

the second equipment is used for converting the optical signal of each path of HDMI interface into an electric signal and calling the output interface of the HDMI to output an HDMI signal;

and the HDMI output interface is connected with the display equipment and is used for outputting standard HDMI signals.

It is a further object of the invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of:

the method comprises the steps that a first device converts a TMDS signal in one path of collected ultrahigh-definition multimedia interface HDMI signals into one path of optical signals;

converting the one-path optical signal into a plurality of paths of optical signals; simultaneously, an MCU controller of the first device respectively performs FRL interaction with the HDMI display device and the HDMI signal source;

the first equipment calls output ports of a plurality of ultra-High Definition Multimedia Interfaces (HDMI) to transmit the plurality of paths of photoelectric signals to second equipment;

the second device converts the optical signal of each HDMI into an electrical signal (the optical signal is converted into the electrical signal, the electrical signal refers to TMDS signal, the standard HDMI signal comprises TMDS signal, DDC, Utility, HPD, CEC and 5V power signal, and other 5 paths of signals belong to the electrical signal originally and are directly integrated with the converted TMDS electrical signal to output the standard HDMI signal), and the output interface of the HDMI is called to output the standard HDMI signal

Another object of the present invention is to provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the transmission method supporting HDMI2.1 signal mimo.

By combining all the technical schemes, the invention has the advantages and positive effects that: the transmission method supporting single-path input and multi-path output of the HDMI2.1 signal, provided by the invention, is suitable for transmission of single-path input and multi-path output of the HDMI2.1 signal of an ultra-high definition multimedia interface, and can solve the problems that the traditional HDMI interface cannot transmit multi-path 8k60HZ resolution videos in one-to-many mode and transmit videos in a long distance. According to the technical scheme, due to the adoption of the HDMI2.1 protocol development, the highest resolution supported by the transmission of the non-compressed video can reach 10K60HZ, only the television is required to support 10K60HZ resolution display, and multiple paths of 10K60HZ resolution videos can be simultaneously output in one-to-many mode by using the scheme. Compared with the existing HDMI one-to-many output technical scheme, due to the adoption of HDMI1.4 or HDMI2.0 protocol development, the supported maximum resolution can only reach 4k60HZ, the stability of all copper wire signals can be affected, the structure of all-fiber equipment can be complex and the cost is increased, and the optimal selection is not realized for the transmission requirement within 300M.

Drawings

Fig. 1 is a flowchart of a transmission method supporting HDMI2.1 signal mimo according to an embodiment of the present invention.

Fig. 2 is a diagram of an example of transmission supporting HDMI2.1 signal single input multiple output according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In view of the problems in the prior art, the present invention provides a transmission method supporting HDMI2.1 signal single input multiple output, and the present invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the transmission method supporting HDMI2.1 signal single input and multiple output according to the embodiment of the present invention includes the following steps:

s101, collecting one path of HDMI signals by first equipment;

s102, converting the TMDS signal in the HDMI into an optical signal by the first equipment;

s103, converting one path of optical signal into a plurality of paths of optical signals by the first equipment;

s104, the first equipment MCU controller completes FRL interaction with the HDMI display equipment and the HDMI signal source respectively;

s105, the first device calls a plurality of output ports of the HDMI to transmit the plurality of paths of photoelectric signals to the second device;

s106, converting the optical signal of each HDMI into an electric signal by the second equipment;

and S107, the second device calls an output interface of the ultra-high-definition multimedia interface HDMI to output a standard HDMI signal.

The transmission system supporting single-channel input and multi-channel output of the HDMI2.1 signal provided by the embodiment of the invention comprises: the device comprises a first device, an electro-optical conversion unit, a light splitter unit, an MCU control unit, an ultra-high definition multimedia interface, a second device, an HDMI display device, an HDMI signal source, an HDMI input interface and an HDMI output interface.

The present invention will be further described with reference to the following examples.

The transmission method supporting single-channel input and multi-channel output of the HDMI2.1 signal provided by the embodiment of the invention comprises the following steps:

step S1, the first device acquires an HDMI signal. In a specific implementation, the first device has only one input interface of the ultra-high definition HDMI signal, and the interface includes 6 channels, where the TMDS channel is responsible for transmission of all audio and video data; the DDC channel enables the HDMI source end to read EDID data of the receiving end and read and write SCDC data through the channel; the CEC, HPD and Utility channels are used primarily for ARC or eARC audio return, and the 5V power supply is used for hdmi power. The electro-optical conversion module in the first device receives a TMDS signal at an HDMI input end, and the MCU control module in the first device receives DDC, CEC, HPD, Utility and 5V power signals at the HDMI input end.

In step S2, the first device converts the TMDS signal in the HDMI into an optical signal. In a specific implementation, the TMDS signal received by the first device includes 4 channels, TMDS Channel0, TMDS Channel1, TMDS Channel2, and TMDS Channel 3. Output from the electro-optical conversion module in the first device are 4 fiber signals.

In step S3, the first device converts the one-path optical signal into multiple-path optical signals. In a specific implementation, the optical splitter in the first device may be designed to output a specified number of sets of optical signals according to the number of HDMI output interfaces, and is not limited to the 4 sets of TMDS outputs illustrated in fig. 2 of the present invention. The optical splitter converts a set of TMDS signals into a plurality of identical optical signals, each of which includes 4 TMDS optical signals.

And step S4, the MCU controller completes FRL interaction with the HDMI display device and the HDMI signal source respectively. In a specific implementation, the MCU controller mainly functions as follows:

as shown in fig. 2, the input end of the MCU controller is connected to the HDMI signal source, wherein the five signals include DDC, CEC, Utility, 5V power and HPD, and the output end of the MCU controller connects the five signals to each second device, the control signals shown in fig. 2 refer to the five signals of DDC, CEC, Utility, 5V power and HPD, and the MCU controller interacts with the HDMI signal source after completing communication with the display ends of the 4 second devices.

In the invention, when an HDMI output interface of first equipment is connected with second equipment through a photoelectric composite cable, and the HDMI output interface of the second equipment is connected with display equipment, after an MCU controller detects an HPD signal, the operation of reading EDID of the display equipment is started, EDID information is stored in a local memory, the EDID is analyzed to judge whether the display equipment supports an FRL mode, if not, the traditional TMDS mode is adopted, if the display equipment supports the FRL, the display equipment supports an HDMI2.1 protocol, and then SCDC is interactively read and written with the display equipment, so that an FRL tracing process is completed. The MCU controller can also acquire CEC, Utility and HPD information of the HDMI display end and report the information to the HDMI signal source end equipment for processing.

In the invention, when the input device interface is connected with a plurality of output interfaces, and the output interfaces are connected with the display device, the MCU controller respectively completes interactive control with the display device according to the interface sequence and the method of the 1 st point, and stores the EDID of each display device in the local memory. The MCU controller comprises a plurality of groups of control signal output interfaces, each group of interfaces comprises five signals of DDC, CEC, Utility, 5v power supply and HPD, and is used for controlling a plurality of display devices simultaneously.

In the invention, the MCU controller selects one EDID which supports the maximum resolution to communicate with the HDMI transmitter according to a plurality of EDID analysis results, the EDID information of the resolution is transmitted to the HDMI transmitting end, the simulation display end and the HDMI transmitting end complete the FRL tracing process, and the HDMI signal source end can confirm the size of the video resolution and the used data transmission mode after the FRL is completed. The MCU controller comprises a storage unit and can simulate master and slave equipment of IIC communication.

In step S5, the first device calls a plurality of output ports of the HDMI to transmit the plurality of photoelectric signals to the second device. In a specific implementation, the first device combines a set of 5-channel control signals output by the MCU controller and a set of TMDS signals output by the optical splitter into one HDMI signal output, and the transmission medium includes a combination of optical fibers and cables for transmission, referring to the control signals and TMDS signals shown in fig. 2.

In step S6, the second device converts the optical signal of the HDMI interface into an electrical signal. In a specific implementation, the second device is provided with an optical receiver, and converts 4 TMDS optical signals in the optical-electrical composite cable into 4 electrical signals.

And step S7, the second device calls an output interface of the HDMI to output a standard HDMI signal, and in the specific implementation, the second device combines the 4 TMDS signals and the DDC, HPD, Utility, CEC and 5v power signals into a standard HDMI signal to be output.

As described above, after the MCU successfully simulates the display device and the HDMI signal source outputs appropriate audio/video signals, the electro-optical conversion module starts to operate, converts the TMDS signal into an optical signal, and transmits the optical signal and the control signal to the second device through the opto-electrical composite cable, wherein the TMDS signal is converted into an electrical signal through the opto-electrical conversion module of the second device, and then combines with the control signal to form a standard HDMI signal for output.

The core of the present invention is step S5, in which the MCU performs FRL communication with the HDMI display device and the HDMI source device, but the FRL communication method is not limited to this, and the FRL communication between the HDMI source device and the HDMI display device also falls within the protection scope of the present invention. It should be noted that the present invention is not limited by the described order of acts, as some steps may occur in other orders or concurrently with other steps, depending on the embodiment of the invention.

The transmission of the control signal shown in fig. 2 of the present invention uses a copper wire cable, and for other schemes, the transmission is performed in an optical fiber form, and it is within the protection scope of the present invention as long as the HDMI2.1 protocol is used to transmit the signal.

The technical solution of the present invention is further described with reference to the following specific examples.

According to the embodiment of the invention, when the maximum resolutions supported by the HDMI display terminal equipment are inconsistent, the HDMI signal source outputs according to the maximum resolution supported by public. Assuming that the HDMI signal source supports 8K60HZ resolution output, after the HDMI display device is connected to the HDMI output interface of the second device shown in fig. two, the MCU controller reads the EDID of each display device and stores the EDID in the local memory, analyzes the EDID content to obtain the information such as the maximum resolution, the pixel coding format, and the like supported by each display device, obtains the supported public resolution and the supported pixel coding format, and communicates the EDID of one device with the HDMI signal source device as the main EDID. And after the HDMI signal source acquires the main EDID information, the HDMI signal source outputs a video with a public supported resolution. For example, some televisions support 8K, and some support 4K, after being analyzed and processed by the MCU, the HDMI source outputs a 4K resolution video in a unified manner, so as to satisfy normal display of all televisions at the HDMI output end.

And if an HDMI display end device is newly added or disconnected in the video playing process, the MCU renews the EDID list stored locally, acquires the maximum resolution supported by the updated public and interacts with the HDMI source end. If the updated public resolution is consistent with the public resolution before the HDMI display device is newly added or disconnected, the HDMI source only needs to keep outputting the previous resolution; if the resolution is inconsistent, the HDMI source needs to output video according to the updated common resolution.

Hdmi (high Definition Media interface): and a high-definition audio and video interface.

TMDS (Transmission Minimized Differential Signal): differential signals are transmitted.

Frl (fixed Rate link): a fixed rate connection.

Ddc (display Data channel): HDMI transceiver end communication channel.

Hpd (hot Plug detect): and (5) hot plug detection.

Edid (extended Display Identification data): the extended display represents data.

MCU (micro Control unit) micro Control unit.

CEC (Consumer Electronics control) Consumer Electronics control channel

SCDC (status and Control Data channel) status and Control Data channel.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A transmission method and a system for supporting single-input multi-output of HDMI2.1 signals are characterized in that the transmission method for the single-input multi-output comprises the following steps:

and the second equipment converts the optical signal of each ultra-high-definition multimedia interface HDMI into an electric signal and calls an output interface of the ultra-high-definition multimedia interface HDMI to output a standard HDMI signal.

2. The single-input multi-output transmission method according to claim 1, wherein the method for acquiring one path of HDMI signals by the first device comprises:

(1) calling an electro-optical conversion unit to receive a TDMS signal in an HDMI input interface;

3. The single input multiple output transmission method according to claim 1, wherein the method of the first device converting the TMDS signal in the HDMI into the optical signal comprises:

4. The mimo transmission method of claim 1, wherein the method for the first device to convert one optical signal into multiple optical signals comprises:

and calling the first equipment optical splitter unit to convert one input TMDS optical signal into 4 input TMDS optical signals.

5. The method for transmitting the single-input multi-output according to claim 1, wherein the method for the first device MCU controller to complete FRL interaction with the HDMI display device and the HDMI signal source respectively comprises:

6. The single-input multi-output transmission method according to claim 1, wherein the first device calls output ports of a plurality of ultra high definition multimedia interfaces HDMI to transmit multi-optical signals into the second device, and each output port of the ultra high definition multimedia interfaces HDMI comprises four optical signals Channel0, Channel1, Channel2, Channel3, and five electrical signals, wherein the five electrical signals comprise DDC, CEC, availability, HPD and 5V power signals.

7. The single-input-multiple-output transmission method according to claim 1, wherein the second device HDMI output port is connected to a display device;

the method for converting the optical signal of each HDMI interface into the electric signal by the second device comprises the following steps:

8. The single-input-multiple-output transmission method according to claim 1, wherein the second device calls an output interface of an ultra High Definition Multimedia Interface (HDMI) to output a standard HDMI signal, and the method comprises:

and calling the HDMI output interface of the ultra-high-definition multimedia interface of the second equipment to output signals conforming to the HDMI standard, wherein the signals comprise a TMDS channel, a DDC channel, a CEC channel, an HPD channel and a Utility channel.

9. A single-input-multiple-output transmission system supporting HDMI2.1 signals, the single-input-multiple-output transmission system comprising:

10. A computer device, characterized in that the computer device comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the steps of:

11. A computer-readable storage medium storing instructions which, when executed on a computer, cause the computer to perform the method of transmission supporting HDMI2.1 signal mimo according to any one of claims 1 to 7.