Bidirectional video optical transmitter

Abstract

The utility model provides a bidirectional video optical transmitter, which relates to the technical field of picture transmission and comprises a transmitter and a receiver, the transmitter and the receiver are respectively provided with a transmitting end and a receiving end, and the bidirectional video optical transmitter comprises an electric signal path processing part and an optical signal path processing part. The two-way video data transmission system based on the wavelength division multiplexing technology is adopted to solve the problems that traditional equipment generally does not have synchronous video transmission and receiving functions, in addition, the traditional equipment often lacks the two-way transmission capacity, application in occasions needing two-way video communication or redundancy guarantee is limited, the transmission quality and stability of the equipment are not high, and the transmission cost is high. The problems of video signal interruption, image quality reduction or sound loss and the like are caused, so that the overall use experience and the reliability of the system are influenced, and therefore, for the ever-increasing requirements on high-quality and high-stability video transmission, the traditional equipment is not careful and cannot adapt to modern technical standards and user expectations.

Description

Technical Field

[0001] The utility model relates to the technical field of picture transmission, in particular to a bidirectional video optical transmitter. Background Art

[0002] The rapid development of high-definition video and audio transmission technology has brought great convenience to our lives and work. In urban road traffic monitoring systems, highway traffic monitoring systems, and public security, confidentiality, production and other monitoring systems, the demand for two-way transmission of video signals and data signals is growing. Optical fiber communication technology has been widely recognized in this field for its unique advantages (small size, light weight, large transmission bandwidth, super strong anti-radiation and anti-electromagnetic interference capabilities, long transmission distance without relays, etc.). Due to the limited resources of optical fiber channels (number of optical fiber cores) and the rapid increase in the amount of information transmitted by monitoring systems, people are paying more and more attention to the development and research of transmission systems that can transmit two-way signals through a single optical fiber.

[0003] In the existing technology, with the continuous advancement of technology, the shortcomings of traditional AV / KVM extenders, matrix switchers, video wall controllers and window processors have gradually become apparent. They usually do not have the function of synchronous video transmission and reception, which means that in application scenarios where multiple video signals need to be transmitted and received simultaneously, these traditional devices cannot meet the needs. In addition, they often lack two-way transmission capabilities, which limits their application in situations where two-way video communication or redundancy is required. The transmission quality and stability of the equipment are not high, which leads to problems such as video signal interruption, image quality degradation or sound loss, thereby affecting the overall user experience and system reliability. Therefore, in the face of the growing demand for high-quality and high-stability video transmission, these traditional devices seem to be unable to keep up and cannot adapt to modern technical standards and user expectations. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a bidirectional video optical transmitter.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a bidirectional video optical transmitter, including a transmitter and a receiver, the transmitter and the receiver are both provided with a transmitting end and a receiving end, the electrical signal path processing part of the bidirectional video optical transmitter includes an ASIC central processor, an HDMI relay module, an EDID learning module, an MCU control signal processing module, a transmission channel detection indication module, an audio signal embedding processing module, an Ethernet and serial channel module, and a power supply module, the optical signal path processing part of the bidirectional video optical transmitter adopts wavelength division multiplexing technology (WDM), the bidirectional video optical transmitter has power supply, EDID learning, optical path link, data loop and network access LED indication, the bidirectional video optical transmitter includes a single-fiber bidirectional optical fiber transmission module, an EDID learning submodule and an audio signal embedding and de-embedding processing module, the bidirectional video optical transmitter includes a 4KHDMI interface, a bidirectional audio, a network port and an RS232 serial port, in the existing technology, with the continuous advancement of technology, traditional AV / K The shortcomings of VM expanders, matrix switchers, video wall controllers and window processors are gradually becoming apparent. They usually do not have the function of synchronous video transmission and reception, which means that in application scenarios where multiple video signals need to be transmitted and received at the same time, these traditional devices cannot meet the needs. In addition, they often lack dual-channel transmission capabilities, which limits their application in situations where two-way video communication or redundancy is required. The transmission quality and stability of the equipment are not high, which leads to problems such as video signal interruption, image quality degradation or sound loss, thereby affecting the overall user experience and system reliability. Therefore, in the face of the growing demand for high-quality and high-stability video transmission, these traditional devices seem to be unable to cope with it and cannot adapt to modern technical standards and user expectations. In response to such problems, the utility model adopts a two-way video data transmission system based on wavelength division multiplexing technology to solve it, and realizes a two-way video optical transmitter using CWDM (coarse wavelength division multiplexing) optical fiber technology and 10Gbs optical fiber transmission technology to transmit bidirectional uncompressed 4K through a single-core single-mode optical fiber. HDMI, two-way audio, 100M Ethernet, and RS232 serial port signals are transmitted to the remote end synchronously in real time, without distortion, and with high quality. Users can receive them in real time at the remote end. The optical transmitter consists of a transmitter and a receiver. With its transceiver function, it can act as a transmitter (Tx) and a receiver (Rx). Through software utilities, it provides excellent deployment flexibility for different application video scenarios.At the same time, optical transmitters have the advantages of low attenuation, wide bandwidth, strong anti-interference performance, high safety performance, small size and light weight, so they have unparalleled advantages in long-distance transmission and special environments. Based on the principle of a two-way audio and video data transmission system using wavelength division multiplexing technology, it adopts a programmable ASIC chipset design and can be used to replace traditional AV / KVM extenders, matrix switchers, video wall controllers and window processors. It has synchronous video transmission and reception functions, can realize HDMI input and output on a single 10G link, and can achieve HDMI low-latency two-way data transmission, two-way RS-232 and Gigabit Ethernet transmission, and lossless transmission of audio signals. The two-way video optical transmitter adopts all-digital video uncompressed transmission technology, and the transmitter is equipped with an HDMI loop-out interface to improve the user experience.

[0006] Preferably, the single-fiber bidirectional optical fiber transmission module includes a receiving unit, a transmitting unit and a management unit (MCU), wherein the transmitting unit drives and amplifies the electrical signal and then connects it to the laser device to convert the electrical signal into an optical signal for transmission and output; the receiving unit converts the optical signal received by the receiving TIA component into an electrical signal and then reshapes and amplifies it for input; the management unit (MCU) realizes DMI debugging and monitoring through the I2C two-wire interface, and the transmission module fully complies with IEEE 802.3ae and SFF-8472 The MSA standard protocol uses optical fiber WDM wavelength division multiplexing technology in single optical fiber bidirectional transmission, including a 1310nm upstream / 1550nm downstream wavelength division multiplexer. The main function of the transmitter is to transmit and transmit upstream signals and receive downstream signals. Conversely, the main function of the receiver is to transmit and transmit downstream signals and receive upstream signals. This constitutes a single-fiber bidirectional video, audio and other data monitoring transmission system. In summary, the use of wavelength division multiplexing technology solves the need for bidirectional transmission of video and data signals on a single single-mode optical fiber. At the same time, the system design reflects the long-distance transmission capability of optical fiber and takes into account the performance-price ratio of the system, with excellent transmission quality and stability.

[0007] Preferably, the display EDID information of the EDID learning submodule is read and saved in the MCU built-in FLASH. The EDID manual learning function is to enable the optical transmitter to be more flexible and convenient to adapt to display screens installed in various resolutions. The learning access method is simple and convenient. First, the device is powered on, the transmitter HDMI IN interface is connected to the display, and the EDID learning button is pressed. At this time, the EDID indicator light changes from off to always on, indicating that the EDID learning mode has been entered. At this time, release the EDID button and wait for the EDID indicator light to flash 2-3 times and then turn off. The EDID learning is completed. In video image transmission, the signal source must obtain the EDID (Extended Display Identification Data) information of the display device before it can output the image most suitable for the display device according to its supported resolution, color depth, etc. In the bidirectional video image optical fiber transmitter, an EDID learning mode is designed to read and save the EDID information of the remote display device, and then provide it to the signal source. This method can achieve long-distance transmission and good compatibility.

[0008] Preferably, the audio signal embedding and de-embedding processing module includes embedded audio within the video and external independent analog audio. The transmitter uses a dip switch to determine whether the analog audio is embedded, and the receiver uses a dip switch to determine whether the audio within the video is de-embedded. In actual applications, the transmitter sometimes needs to synchronously transmit the local analog audio signal to a remote mixing console. In this case, an independent audio transmission channel is required to complete this function. Sometimes, the external analog audio input signal needs to be embedded in the video signal for transmission. This requires the use of an HDMI repeater to embed the audio signal and transmit it synchronously with the video after analog-to-digital conversion. The receiver sometimes needs to maintain the original sound transmission within the video. In this case, the de-embedding function can be shielded by a switch circuit to maintain the original sound transmission within the HDMI. If the external audio signal is required to be restored and output, the de-embedding function of the HDMI repeater is turned on and off, and the audio signal is transmitted to the remote end after digital-to-analog conversion. The transmitter and receiver of the optical transmitter include both audio acquisition and audio output terminals. When the transmitter and receiver are connected by optical fiber, a bidirectional audio transmission channel is formed.

[0009] Preferably, the bidirectional video optical transmitter embeds audio at the transmitting end of the video repeater and de-embeds audio at the receiving end of the video repeater, and the embedded and de-embedded audio and the independent audio are transmitted at different time periods through the DIP switch setting.

[0010] Preferably, the single-fiber bidirectional optical fiber transmission module adopts wavelength division multiplexing technology, optical fiber WDM wavelength division multiplexing technology, and includes a wavelength division multiplexer for 1310nm uplink / 1550nm downlink. The main function of the transmitter is to transmit and transmit uplink signals and receive downlink signals. Conversely, the main function of the receiver is to transmit and transmit downlink signals and receive uplink signals, thus forming a single-fiber bidirectional video, audio and other data monitoring transmission system.

[0011] Preferably, the bidirectional video optical transmitter can process a maximum audio sampling frequency of 192 kHz and supports multi-channel I2S or S / PDIF audio formats.

[0012] Beneficial effects:

[0013] 1. In the existing technology, with the continuous advancement of technology, the shortcomings of traditional AV / KVM extenders, matrix switchers, video wall controllers and window processors have gradually become apparent. They usually do not have the function of synchronous video transmission and reception, which means that in application scenarios where multiple video signals need to be transmitted and received simultaneously, these traditional devices cannot meet the needs. In addition, they often lack dual-channel transmission capabilities, which limits their application in situations where two-way video communication or redundancy is required. The transmission quality and stability of the equipment are not high, which leads to problems such as video signal interruption, image quality degradation or sound loss, thereby affecting the overall user experience and system reliability. Therefore, in the face of the growing demand for high-quality and high-stability video transmission, these traditional devices seem to be unable to meet the needs and cannot adapt to modern technical standards and user expectations. To solve such problems, the utility model adopts a two-way video data transmission system based on wavelength division multiplexing technology to solve the problem. The bidirectional video optical transmitter adopts CWDM (coarse wavelength division multiplexing) optical fiber technology and 10Gbs optical fiber transmission technology to transmit bidirectional uncompressed 4K video through a single-core single-mode optical fiber. HDMI, two-way audio, 100M Ethernet, and RS232 serial port signals are transmitted to the remote end synchronously in real time, without distortion, and with high quality. Users can receive them in real time at the remote end. The optical transmitter consists of a transmitter and a receiver. With its transceiver function, it can act as a transmitter (Tx) and a receiver (Rx). Through software utilities, it provides excellent deployment flexibility for different application video scenarios. At the same time, optical transmitters have the advantages of low attenuation, wide bandwidth, strong anti-interference performance, high safety performance, small size and light weight, so they have unparalleled advantages in long-distance transmission and special environments. Based on the principle of a two-way audio and video data transmission system using wavelength division multiplexing technology, it adopts a programmable ASIC chipset design and can be used to replace traditional AV / KVM extenders, matrix switchers, video wall controllers and window processors. It has synchronous video transmission and reception functions, can realize HDMI input and output on a single 10G link, and can achieve HDMI low-latency two-way data transmission, two-way RS-232 and Gigabit Ethernet transmission, and lossless transmission of audio signals. The two-way video optical transmitter adopts all-digital video uncompressed transmission technology, and the transmitter is equipped with an HDMI loop-out interface to improve the user experience.

[0014] 2. The transmitting unit of the single-fiber bidirectional optical transmission module drives and amplifies electrical signals before connecting them to a laser device, converting them into optical signals for transmission and output. The receiving unit converts the optical signals received by the TIA assembly into electrical signals, reshapes and amplifies them for input, and the management unit (MCU) implements DMI debugging and monitoring via an I2C two-wire interface. The transmission module fully complies with IEEE 802.3ae and SFF-8472 MSA standards and utilizes optical WDM technology for bidirectional transmission over a single fiber. The module includes a 1310nm upstream / 1550nm downstream wavelength division multiplexer. The transmitter's primary function is to transmit upstream signals and receive downstream signals, while the receiver's primary function is to transmit downstream signals and receive upstream signals. This creates a single-fiber bidirectional video, audio, and other data monitoring transmission system. In summary, the use of wavelength division multiplexing technology addresses the need for bidirectional transmission of video and data signals over a single single-mode fiber. The system design also leverages the long-distance transmission capabilities of optical fiber while balancing performance and price, resulting in excellent transmission quality and stability.

[0015] 3. The EDID manual learning function is designed to enable the optical transmitter to be more flexible and convenient to adapt to display screens of various resolutions. The learning access method is simple and convenient. First, power on the device, connect the transmitter HDMI IN interface to the monitor, and press and hold the EDID learning button. At this time, the EDID indicator light will turn from off to solid light, indicating that it has entered the EDID learning mode. At this time, release the EDID button and wait for the EDID indicator light to flash 2-3 times and then turn off. EDID learning is completed. In video image transmission, the signal source must obtain the EDID (Extended Display Identification Data) information of the display device before it can output the most suitable image for the display device according to its supported resolution, color depth, etc. In the two-way video image optical fiber transmitter, the EDID learning mode is designed to read and save the EDID information of the remote display device, and then provide it to the signal source. This method can achieve long-distance transmission and good compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the application of the optical transmitter of the utility model;

[0017] Figure 2 This is a system principle block diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the wavelength division multiplexing technology of the present utility model;

[0019] Figure 4 This is a schematic diagram of the audio transmission channel of the present utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the transmitter of the present utility model;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the receiver of the present invention. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0023] The specific embodiments of the present utility model are described below with reference to the accompanying drawings. Specific embodiment:

[0025] Reference Figure 1-6, bidirectional video optical transmitter, including a transmitter and a receiver, the transmitter and the receiver are both equipped with a transmitting end and a receiving end, the electrical signal path processing part of the bidirectional video optical transmitter includes an ASIC central processor, an HDMI relay module, an EDID learning module, an MCU control signal processing module, a transmission channel detection indication module, an audio signal including an embedding processing module, an Ethernet and serial channel module, a power supply module, the optical signal path processing part of the bidirectional video optical transmitter uses wavelength division multiplexing technology (WDM), the bidirectional video optical transmitter has power supply, EDID learning, optical path link, data loop and network access LED indication, the bidirectional video optical transmitter includes a single-fiber bidirectional optical fiber transmission module, an EDID learning sub-module and an audio signal embedding and de-embedding processing module, the bidirectional video optical transmitter includes a 4KHDMI interface, a two-way audio, a network port and an RS232 serial port, with the continuous advancement of technology, traditional AV / KVM extenders, matrix switches, video The shortcomings of wall controllers and window processors are gradually becoming apparent. They usually do not have the function of synchronous video transmission and reception, which means that in application scenarios where multiple video signals need to be transmitted and received simultaneously, these traditional devices cannot meet the needs. In addition, they often lack two-way transmission capabilities, which limits their application in situations where two-way video communication or redundancy is required. The transmission quality and stability of the equipment are not high, which leads to problems such as video signal interruption, image quality degradation or sound loss, thereby affecting the overall user experience and system reliability. Therefore, in the face of the growing demand for high-quality and high-stability video transmission, these traditional devices seem to be unable to cope with it and cannot adapt to modern technical standards and user expectations. The solution is to use a two-way video data transmission system based on wavelength division multiplexing technology to achieve a two-way video optical transmitter using CWDM (coarse wavelength division multiplexing) optical fiber technology and 10Gbs optical fiber transmission technology to transmit bidirectional uncompressed 4K through a single-mode optical fiber. HDMI, two-way audio, 100M Ethernet, and RS232 serial port signals are transmitted to the remote end synchronously in real time, without distortion, and with high quality. Users can receive them in real time at the remote end. The optical transmitter consists of a transmitter and a receiver. With its transceiver function, it can act as a transmitter (Tx) and a receiver (Rx). Through software utilities, it provides excellent deployment flexibility for different application video scenarios.Optical transmitters offer advantages such as low attenuation, wide bandwidth, strong anti-interference performance, high security, compact size, and light weight, making them unparalleled in long-distance transmission and use in challenging environments. Based on the principles of a bidirectional audio and video data transmission system using wavelength division multiplexing technology and utilizing a programmable ASIC chipset, they can replace traditional AV / KVM extenders, matrix switchers, video wall controllers, and window processors. They feature simultaneous video transmission and reception, enabling HDMI input and output over a single 10G link. They enable low-latency bidirectional HDMI data transmission, as well as bidirectional RS-232 and Gigabit Ethernet transmission, while also transmitting lossless audio signals. These bidirectional video optical transmitters utilize fully digital, uncompressed video transmission technology, and feature an HDMI loop-through output on the transmitter, enhancing the user experience. The transmitter embeds audio at the transmitting end of the video repeater and de-embeds it at the receiving end. DIP switches are used to configure the transmission of embedded and de-embedded audio, as well as independent audio, at different times. The transmitters handle a maximum audio sampling rate of 192 kHz and support multi-channel I2S or S / PDIF audio formats.

[0026] The single-fiber bidirectional optical transmission module consists of a receiving unit, a transmitting unit, and a management unit (MCU). The transmitting unit drives and amplifies electrical signals before connecting them to a laser device, converting them into optical signals for transmission and output. The receiving unit converts the optical signals received by the TIA assembly into electrical signals, reshaping and amplifying them for input. The management unit (MCU) implements DMI debugging and monitoring via an I2C two-wire interface. The transmission module fully complies with IEEE 802.3ae and SFF-8472 MSA standards and utilizes optical WDM technology for bidirectional transmission over a single fiber. The module includes a 1310nm upstream / 1550nm downstream wavelength division multiplexer (WDM). The transmitter's primary function is to transmit upstream signals and receive downstream signals, while the receiver's primary function is to transmit downstream signals and receive upstream signals. This creates a single-fiber bidirectional video, audio, and other data surveillance transmission system. In summary, WDM technology addresses the need for bidirectional transmission of video and data signals over a single single-mode fiber. The system design also reflects the long-distance transmission capabilities of optical fiber while balancing performance and price, resulting in excellent transmission quality and stability. The EDID learning submodule reads the monitor's EDID information and saves it to the MCU's built-in FLASH. The EDID manual learning function enables the optical transmitter to be more flexible and conveniently adapted to displays of various resolutions. The learning access method is simple and convenient. First, power on the device, connect the transmitter's HDMI IN interface to the monitor, and press and hold the EDID learning button. The EDID indicator will turn from off to solid on, indicating that the EDID learning mode has been entered. Release the EDID button and wait for the EDID indicator to flash 2-3 times and then turn off. EDID learning is complete. In video image transmission, the signal source must obtain the display device's EDID (Extended Display Identification Data) information before it can output the most suitable image for the display device based on its supported resolution, color depth, and other conditions. In the bidirectional video image fiber optic transmitter, an EDID learning mode is designed to read and save the EDID information of the remote display device and then provide it to the signal source. This method can achieve long-distance transmission and good compatibility.The audio signal embedding and de-embedding processing module includes embedded audio within the video and external independent analog audio. A DIP switch on the transmitter controls whether analog audio is embedded, while a DIP switch on the receiver controls whether audio is de-embedded within the video. In practical applications, the transmitter sometimes needs to transmit the local analog audio signal synchronously to a remote mixing console, requiring an independent audio transmission channel. Sometimes, external analog audio input signals need to be embedded within the video signal for transmission, requiring an HDMI repeater to embed the audio signal and transmit it synchronously with the video after analog-to-digital conversion. The receiver sometimes needs to maintain the original audio within the video. This can be achieved by disabling the de-embedding function with a switch circuit. If the external audio signal is required to be restored and output, the HDMI repeater's de-embedding function is turned on and off, and the audio signal is transmitted to the remote end after digital-to-analog conversion. The transmitter and receiver of the optical transmitter include both audio capture and audio output. When the transmitter and receiver are connected by optical fiber, a bidirectional audio transmission channel is formed.

[0027] The operating principle of this utility model is as follows: Optical transmitters are tested in pairs. The HDMI IN port on the transmitter or receiver is connected to a PC port or signal source using an HDMI cable. The corresponding HDMI OUT port on the receiver or transmitter is connected to a monitor using an HDMI cable. Similarly, external independent audio and RS232 serial signals are connected to the transmitter (or receiver) input at one end and the receiver transmitter (or transmitter) output at the other end. Connecting Ethernet and optical fiber, powering on the system enters the test environment. Turn on the AC power and preheat for 60 seconds or more. The EDID MODE switch has two states: "EMBEDDED" and "PASSTHROUGH." In EMBEDDED mode, the system enters EDID learning mode. Press the EDID LEARN learning switch to complete EDID learning according to the "EDID LEARN" indicator. Connect a transmitter or receiver according to the system connection diagram. The system enters extended test mode in "EMBEDDED" learning mode or "PASSTHROUGH" transparent transmission mode, respectively. The "POWERN," "LINK," "VIDEOIN," and "VIDEOOUT" indicators and screen display determine whether system operating parameters, such as power supply, fiber link connectivity, audio and video input and output, EDID reading information, and resolution, are operating normally. The AUDIOMODE switch has two states: "EMBEDDED" and "ORIGINAL." In EMBEDDED mode, analog audio embedding (transmitter) and de-embedding (receiver) are enabled. Audio embedding requires analog audio signal access, A / D conversion, format encoding, and clock generation. To increase the signal's dynamic range and prevent aliasing distortion during A / D conversion, the analog input channels should be equipped with signal conditioning circuits and anti-aliasing filters. Audio de-embedding extracts and decodes digital audio in formats like SPDIF / I2S, recovering the master clock and synchronization signals. The audio data is then D / A converted for analog audio output. In ORIGINAL mode, external independent audio signals are transmitted. Bidirectional RS232 signals are fed into the level shifter chip via a 3P connector, with TXD input on the left and RXD output on the right, with GND connected in the middle. The network interface is a high-performance 2+2-port 10 / 100 / 1000M Ethernet switch chip with low power consumption and high integration, supporting 1000Base-T, 100Base-TX, and 10Base-T. Indicator lights: The red power indicator lights up directly when AC / DC power is connected. The LINK indicator lights up when the system receives a stable optical transmission signal RXLOS. The VIDEOIN and VIDEOOUT indicators are always on when the video signal is correctly input and output. The signal source and display video are transmitted synchronously, without any black screen, flickering screen, distorted screen, or other problems.Replace different display devices, switch resolutions, and observe whether the display results meet the standard requirements. Repeated plug and unplug test of the optical fiber interface to ensure that the test standards are met. Power off and restart the transmitter and receiver separately or simultaneously to ensure that the test standards are met.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Bidirectional video optical transmitter, characterized by: It includes a transmitter and a receiver, and both the transmitter and the receiver are provided with a transmitting end and a receiving end. The electrical signal path processing part of the bidirectional video optical transmitter includes an ASIC central processor, an HDMI relay module, an EDID learning module, an MCU control signal processing module, a transmission channel detection indication module, an audio signal embedding processing module, an Ethernet and serial channel module, and a power supply module. The optical signal path processing part of the bidirectional video optical transmitter uses wavelength division multiplexing technology. The bidirectional video optical transmitter has power supply, EDID learning, optical path link, data loop and network access LED indication. The bidirectional video optical transmitter includes a single-fiber bidirectional optical fiber transmission module, an EDID learning sub-module and an audio signal embedding and de-embedding processing module. The bidirectional video optical transmitter includes a 4KHDMI interface, bidirectional audio, a network port and an RS232 serial port.

2. The bidirectional video optical transmitter according to claim 1, wherein: The single-fiber bidirectional optical fiber transmission module includes a receiving unit, a sending unit and a management unit MCU.

3. The bidirectional video optical transmitter according to claim 1, wherein: The display EDID information of the EDID learning submodule is read and saved in the MCU built-in FLASH.

4. The bidirectional video optical transmitter according to claim 1, wherein: The audio signal embedding and de-embedding processing module includes video embedded and de-embedded audio and external independent analog audio.

5. The bidirectional video optical transmitter according to claim 1, wherein: The bidirectional video optical transmitter embeds audio at the transmitting end of the video repeater and de-embeds audio at the receiving end of the video repeater. The embedded and de-embedded audio and the independent audio are transmitted at different time periods through the setting of the dip switch.

6. The bidirectional video optical transmitter according to claim 1, wherein: The single-fiber bidirectional optical fiber transmission module adopts wavelength division multiplexing technology.

7. The bidirectional video optical transmitter according to claim 1, wherein: The bidirectional video optical transmitter can process a maximum audio sampling frequency of 192 kHz and supports multiple audio formats such as multi-channel I2S or S / PDIF.

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