Input and output circuit based on signal conversion and input and output matrix

Abstract

The utility model discloses an input / output circuit and an input / output matrix based on signal conversion, and the circuit comprises a video signal input module, a first signal conversion module, a video matrix processing module, a second signal conversion module, and a video signal output module. And the HDMI video signal is processed by the video matrix processing module, and then the processed HDMI video signal is converted into a DP signal to be output. Therefore, according to the utility model, the multi-input multi-output DP video signal switching and distribution can be realized, a plurality of signals are switched and distributed to a plurality of devices, 8K video signal output is realized, the video output definition is improved, the use convenience of a user is further improved, the influence of the outside on video input and output chips is eliminated through the ESD protection circuit, and the user experience is improved. And the anti-interference capability of the product on the electromagnetic field effect of electrostatic discharge is improved.

Description

Technical Field

[0001] This utility model relates to the field of input / output matrix technology, and in particular to an input / output circuit and input / output matrix based on signal conversion. Background Technology

[0002] With the popularization of digital multimedia devices, the demand for high-definition audio and video transmission is growing. The DP interface, with its advantages of high bandwidth and multi-protocol compatibility, has become the core transmission standard in fields such as game consoles, smart TVs, and medical imaging equipment.

[0003] DisplayPort (DP) matrices, as key devices for switching and distributing multiple signal sources, play a vital role in scenarios such as business meetings, educational presentations, and medical diagnostics. However, mainstream DP matrices on the market only support 4K 60Hz resolution output, making them incompatible with 8K ultra-high-definition display devices. When connecting terminals with different resolutions, the system automatically downgrades to the lowest resolution (e.g., 1080P), preventing high-resolution display devices from leveraging their hardware performance advantages, resulting in loss of image detail and a degraded visual experience. Furthermore, they cannot directly process DP signals. Therefore, proposing a technical solution that can improve the clarity of video output through signal conversion and processing, thereby enhancing the user experience, is particularly important. Utility Model Content

[0004] This invention provides an input / output circuit and input / output matrix based on signal conversion, which can improve the clarity of video output through signal conversion processing, thereby enhancing the user experience.

[0005] To address the aforementioned technical problems, the first aspect of this utility model discloses an input / output circuit based on signal conversion, characterized in that the circuit includes a video signal input module, a first signal conversion module, a video matrix processing module, a second signal conversion module, and a video signal output module, wherein:

[0006] The first end of the video signal input module is used to input a first video signal of a first type. The second end of the video signal input module is electrically connected to the first end of the first signal conversion module. The second end of the first signal conversion module is electrically connected to the first end of the video matrix processing module. The second end of the video matrix processing module is electrically connected to the first end of the second signal conversion module. The second end of the second signal conversion module is electrically connected to the first end of the video signal output module. The second end of the video signal output module is used to be electrically connected to the target display device.

[0007] The first signal conversion module is used to convert the first video signal of the first type into a second video signal of the second type;

[0008] The video matrix processing module is used to perform signal processing operations on the second video signal of the second type to obtain the third video signal of the second type, and transmit the third video signal of the second type to the second signal conversion module;

[0009] The second signal conversion module is used to convert the third video signal of the second type into the fourth video signal of the first type;

[0010] The video signal output module is used to transmit the fourth video signal of the first type to the target display device;

[0011] Furthermore, the video signal input module includes a first ESD protection circuit assembly, and the video signal output module includes a second ESD protection circuit assembly, wherein:

[0012] The first terminal of the first ESD protection circuit assembly is used to input a first video signal of the first type; the second terminal of the first ESD protection circuit assembly is electrically connected to the first terminal of the first signal conversion module; the first terminal of the second ESD protection circuit assembly is electrically connected to the second terminal of the second signal conversion module; and the second terminal of the second ESD protection circuit assembly is used to be electrically connected to the target display device.

[0013] The first ESD protection circuit assembly includes six first ESD protection circuits, and the second ESD protection circuit assembly includes six second ESD protection circuits.

[0014] As an optional implementation, in the first aspect of this utility model, the circuit further includes a video signal processing module, wherein:

[0015] The first end of the video signal processing module is electrically connected to the second end of the first signal conversion module, and the second end of the video signal processing module is electrically connected to the first end of the video matrix processing module.

[0016] The video signal processing module is used for gain control of the compensation insertion loss of the second type of second video signal.

[0017] As an optional implementation, in the first aspect of this utility model, the circuit further includes a digital-to-analog conversion module, a signal amplification module, and an audio output module, wherein:

[0018] The first end of the digital-to-analog converter module is electrically connected to the third end of the video matrix processing module, the second end of the digital-to-analog converter module is electrically connected to the first end of the signal amplification module, the second end of the signal amplification module is electrically connected to the first end of the audio output module, and the second end of the audio output module is used to electrically connect to the target audio device.

[0019] The video matrix processing module performs signal processing operations on the second video signal of the second type to obtain the third video signal of the second type and the digital audio signal.

[0020] The digital-to-analog conversion module is used to perform digital-to-analog conversion on the digital audio signal to obtain an analog audio signal;

[0021] The signal amplification module is used to perform a signal amplification operation on the analog audio signal to obtain the amplified analog audio signal;

[0022] The audio output module is used to transmit the amplified analog audio signal to the target audio device.

[0023] As an optional implementation, in the first aspect of this utility model, the circuit further includes a driving module, wherein:

[0024] The first end of the driving module is electrically connected to the fourth end of the video matrix processing module, and the second end of the driving module is used to be electrically connected to the optical fiber transmitter base.

[0025] The driving module is used to perform signal driving operations on the digital audio signal to obtain the target digital audio signal, and transmit the target digital audio signal to the optical fiber transmitter.

[0026] As an optional implementation, in the first aspect of this utility model, the circuit further includes a control module, which includes a control chip, an EDID DIP switch circuit, and a CEC circuit, wherein:

[0027] The first terminal of the control chip is electrically connected to the fifth terminal of the video matrix processing module, the second terminal of the control chip is electrically connected to the first terminal of the EDID DIP switch circuit, and the third terminal of the control chip is electrically connected to the CEC circuit.

[0028] As an optional implementation, in the first aspect of this utility model, the control module further includes a selection circuit, wherein:

[0029] The first terminal of the selection circuit is electrically connected to the fourth terminal of the control chip;

[0030] The selection circuit is used to receive control commands input by the user for selecting the signal output type.

[0031] As an optional implementation, in the first aspect of this utility model, the first signal conversion module includes a first signal conversion chip and a power supply circuit, and the second signal conversion module includes a second signal conversion chip, wherein:

[0032] The first terminal of the first signal conversion chip is electrically connected to the second terminal of the video signal input module, the second terminal of the first signal conversion chip is electrically connected to the first terminal of the video matrix processing module, the third terminal of the first signal conversion chip is electrically connected to the power supply circuit, the first terminal of the second signal conversion chip is electrically connected to the second terminal of the video matrix processing module, and the second terminal of the second signal conversion chip is electrically connected to the first terminal of the video signal output module.

[0033] As an optional implementation, in the first aspect of this utility model, the video signal input module further includes a signal detection circuit, and the video signal output module further includes a configuration switching circuit, wherein:

[0034] The first terminal of the signal detection circuit is electrically connected to the second terminal of the first ESD protection circuit combination, the second terminal of the signal detection circuit is electrically connected to the first terminal of the first signal conversion module, the first terminal of the configuration switching circuit is electrically connected to the second terminal of the second ESD protection circuit combination, and the second terminal of the configuration switching circuit is used to be electrically connected to the target display device.

[0035] The signal detection circuit is used to detect the first type of video signal;

[0036] The configuration switching circuit is used to detect the device type of the target display device and switch the output mode that matches the device type.

[0037] As an optional implementation, in the first aspect of this utility model, the first video signal of the first type includes up to four DP video signals, the fourth video signal of the first type includes up to two DP video signals, and the fourth video signal of the first type includes DP signals with 8K resolution.

[0038] The second aspect of this utility model discloses an input-output matrix based on signal conversion, characterized in that the input-output matrix includes an input-output circuit based on signal conversion as described in any one of the claims of the first aspect of this utility model.

[0039] Implementing this utility model has the following beneficial effects:

[0040] In this invention, a signal conversion module converts DP video signals to HDMI video signals, and a video matrix processing module processes the HDMI video signals before converting the processed HDMI video signals back to DP signals for output. Therefore, this invention enables multi-input, multi-output DP video signal switching and distribution, allowing multiple signals to be switched and distributed to multiple devices, achieving 8K video signal output, improving video output clarity, and thus enhancing user convenience. The ESD protection circuit eliminates external influences on the video input and output chips, improving the stability and quality of DP signals during data transmission and enhancing the product's resistance to electromagnetic interference from electrostatic discharge. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of an input / output circuit based on signal conversion disclosed in an embodiment of this utility model;

[0043] Figure 2 This is a schematic diagram of the structure of a video matrix processing chip disclosed in an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of a first ESD protection circuit combination disclosed in an embodiment of the present utility model;

[0045] Figure 4 This is a schematic diagram of the structure of a second ESD protection circuit combination disclosed in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of another input / output circuit based on signal conversion disclosed in an embodiment of this utility model;

[0047] Figure 6 This is a schematic diagram of the structure of a digital-to-analog conversion module disclosed in an embodiment of this utility model;

[0048] Figure 7 This is a schematic diagram of the structure of a signal amplification module disclosed in an embodiment of this utility model;

[0049] Figure 8 This is a schematic diagram of the structure of a 3.5mm audio output module disclosed in an embodiment of this utility model;

[0050] Figure 9 This is a schematic diagram of the structure of a driving module disclosed in an embodiment of this utility model;

[0051] Figure 10 This is a schematic diagram of the structure of an SPDIF audio output module disclosed in an embodiment of this utility model;

[0052] Figure 11 This utility model discloses a schematic diagram of the structure of an EDID DIP switch circuit;

[0053] Figure 12 This is a schematic diagram of the structure of a CEC circuit disclosed in an embodiment of this utility model;

[0054] Figure 13 This is a schematic diagram of the structure of a selection circuit disclosed in an embodiment of this utility model;

[0055] Figure 14 This is a schematic diagram of the structure of a signal detection circuit disclosed in an embodiment of this utility model;

[0056] Figure 15 This is a schematic diagram of the configuration switching circuit disclosed in an embodiment of the present utility model;

[0057] Figure 16 This is a schematic diagram of the structure of an input-output matrix based on signal conversion disclosed in an embodiment of this utility model. Detailed Implementation

[0058] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0059] It should be noted that, unless otherwise expressly specified and limited, the term "electrical connection" in the specification, claims, and accompanying drawings of this utility model should be interpreted broadly. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical-electrical connection, or a connection that allows for communication; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Furthermore, the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] This utility model discloses an input / output circuit based on signal conversion, capable of switching and distributing multiple input / output DP video signals. It switches and distributes multiple signals to multiple devices, achieving 8K video signal output, improving video output clarity, and thus enhancing user convenience. The ESD protection circuit eliminates external influences on the video input and output chips, improving the stability and quality of the DP signal during data transmission and enhancing the product's resistance to electromagnetic interference from electrostatic discharge. Detailed descriptions follow.

[0061] Example 1

[0062] Please see Figure 1 , Figure 1 This is a schematic diagram of an input / output circuit based on signal conversion disclosed in an embodiment of this utility model. Wherein, Figure 1 The signal conversion-based input / output circuit shown can be applied to a signal conversion-based input / output matrix. This input / output matrix can convert DP video signals to HDMI signals, perform signal processing, and then convert the processed HDMI signals back to DP signals. It can switch and distribute multiple DP signals to multiple devices, achieving 8K resolution DP video signal output and improving video output clarity. This embodiment of the invention is not limited to any particular type. Figure 1 As shown, the signal conversion-based input / output circuit may include: a video signal input module 101, a first signal conversion module 102, a video matrix processing module 103, a second signal conversion module 104, and a video signal output module 105, wherein:

[0063] The first terminal of the video signal input module 101 is used to input a first video signal of the first type. The second terminal of the video signal input module 101 is electrically connected to the first terminal of the first signal conversion module 102. The second terminal of the first signal conversion module 102 is electrically connected to the first terminal of the video matrix processing module 103. The second terminal of the video matrix processing module 103 is electrically connected to the first terminal of the second signal conversion module 104. The second terminal of the second signal conversion module 104 is electrically connected to the first terminal of the video signal output module 105. The second terminal of the video signal output module 105 is used to be electrically connected to the target display device 106.

[0064] The first signal conversion module 102 is used to convert a first type of first video signal into a second type of second video signal;

[0065] The video matrix processing module 103 is used to perform signal processing operations on the second type of second video signal to obtain the third type of second video signal, and transmit the third type of second video signal to the second signal conversion module 104.

[0066] The second signal conversion module 104 is used to convert the second type of third video signal into the first type of fourth video signal;

[0067] The video signal output module 105 is used to transmit the fourth video signal of the first type to the target display device 106;

[0068] Furthermore, the video signal input module includes a first ESD protection circuit assembly, and the video signal output module includes a second ESD protection circuit assembly, wherein:

[0069] The first terminal of the first ESD protection circuit assembly is used to input a first video signal of the first type. The second terminal of the first ESD protection circuit assembly is electrically connected to the first terminal of the first signal conversion module. The first terminal of the second ESD protection circuit assembly is electrically connected to the second terminal of the second signal conversion module. The second terminal of the second ESD protection circuit assembly is used to be electrically connected to the target display device.

[0070] The first ESD protection circuit assembly includes six first ESD protection circuits, and the second ESD protection circuit assembly includes six second ESD protection circuits.

[0071] In this embodiment of the present invention, optionally, the video signal input module 101 may include a four-channel DP video signal input unit, that is, the video signal input module can be used to simultaneously input four channels of DP video signals, that is, the first video signal of the first type includes at most four channels of DP video signals, and the first video signal of the first type includes DP type video signals. The first signal conversion module 102 may include a DP to HDMI signal conversion module, that is, the first signal conversion module can be used to convert DP video signals to HDMI video signals. This embodiment does not limit this.

[0072] In this embodiment of the present invention, optionally, the video matrix processing module 103 may include a four-input, two-output HDMI video matrix processing module, wherein the four-input, two-output HDMI video matrix processing module can input up to four HDMI video signals and perform signal processing operations on each HDMI video signal to obtain and output up to two HDMI video signals; optionally, the four-input, two-output HDMI video matrix processing module may include a video matrix processing chip, such as... Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a video matrix processing chip disclosed in an embodiment of the present invention. The components included in the video matrix processing chip and the connection methods between these components can be as follows: Figure 2 As shown, the four-input two-output video matrix processing module can be composed of at least one KM864807 chip with equalizer gain control and peripheral circuitry; that is, the video matrix processing chip is a KM864807 chip. Furthermore, the four-input two-output HDMI video matrix processing module can be used to perform signal processing operations on the second type of second video signal, i.e., to perform signal processing operations on HDMI type video signals. Specifically, it can be used to perform audio and video signal separation operations on the four HDMI signals converted from four DP video signals to obtain HDMI video signals and audio signals, and the HDMI video signal can include an 8K resolution video signal.

[0073] In this embodiment of the present invention, optionally, the second signal conversion module 104 may include an HDMI to DP signal conversion module, that is, the first signal conversion module may be used to convert HDMI video signals to DP video signals, the video signal output module 105 may output up to two DP video signals, and the DP video signals may include 8K resolution video signals, that is, the first type of fourth video signal includes up to two DP video signals, the first type of fourth video signal includes 8K resolution DP signals, and the target display device 106 may include devices such as smartphones, smart computers, smart tablets, LED screens, etc. that can be used to display video information, which is not limited in this embodiment.

[0074] In this embodiment of the utility model, optionally, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a first ESD protection circuit combination disclosed in an embodiment of the present utility model. The first ESD protection circuit combination includes six first ESD protection circuits, and each ESD protection circuit is an instantaneous ESD suppression circuit with a minimum junction capacitance of 0.2pF and a reverse breakdown voltage of 5V. The six ESD circuits are used to connect in parallel on the input and output DP high-speed signals, which can improve the product's anti-interference capability against the electromagnetic field effect of electrostatic discharge.

[0075] In this embodiment of the utility model, optionally, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of a second ESD protection circuit combination disclosed in an embodiment of the present invention. The second ESD protection circuit combination includes six second ESD protection circuits, and each ESD protection circuit is an instantaneous ESD suppression circuit with a minimum junction capacitance of 0.2pF and a reverse breakdown voltage of 5V. The six ESD circuits are used to connect in parallel on the input and output DP high-speed signals, which can improve the product's anti-interference capability against the electromagnetic field effect of electrostatic discharge.

[0076] It is evident that implementation Figure 1 The described signal conversion-based input / output circuit can convert DP video signal format to HDMI video signal through a signal conversion module, process the HDMI video signal through a video matrix processing module, and then convert the processed HDMI video signal back to DP signal for output. It can realize multiple input and multiple output DP video signal switching and distribution, switching and distributing multiple signals to multiple devices to achieve 8K video signal output, improve video output clarity, and thus improve user convenience. The ESD protection circuit eliminates the influence of external factors on the video input and output chips, which helps to improve the stability and high quality of DP signal during data transmission and improves the product's anti-interference ability against electromagnetic field effects of electrostatic discharge.

[0077] In an optional embodiment, such as Figure 5 As shown, Figure 5 This is a schematic diagram of another input / output circuit based on signal conversion disclosed in an embodiment of the present invention. This input / output circuit based on signal conversion further includes: a video signal processing module 107, wherein:

[0078] The first terminal of the video signal processing module 107 is electrically connected to the second terminal of the first signal conversion module 102, and the second terminal of the video signal processing module 107 is electrically connected to the first terminal of the video matrix processing module 103.

[0079] The video signal processing module 107 is used for gain control of the second type of second video signal to compensate for insertion loss.

[0080] In this optional embodiment, the video signal processing module may optionally include a video processing chip, wherein the video signal processing chip may include a PS8419 video processing chip with Redriver function, and the video processing chip can compensate for the insertion loss of the second video signal of the second type of gain control.

[0081] As can be seen, implementing this optional embodiment can improve the quality and stability of the HDMI signal by using a video signal processing chip to perform gain control on the compensated insertion loss of the received video.

[0082] In another alternative embodiment, such as Figure 5 As shown, the input / output circuit based on signal conversion also includes: a digital-to-analog converter module 108, a signal amplification module 109, and an audio output module 110, wherein:

[0083] The first end of the digital-to-analog converter module 108 is electrically connected to the third end of the video matrix processing module 103, the second end of the digital-to-analog converter module 108 is electrically connected to the first end of the signal amplification module 109, the second end of the signal amplification module 109 is electrically connected to the first end of the audio output module 110, and the second end of the audio output module 110 is used to be electrically connected to the target audio device 111.

[0084] Among them, after the video matrix processing module 103 performs signal processing operation on the second video signal of the second type, it obtains the third video signal of the second type and the digital audio signal.

[0085] The digital-to-analog converter module 108 is used to perform digital-to-analog conversion on digital audio signals to obtain analog audio signals;

[0086] The signal amplification module 109 is used to perform signal amplification on the analog audio signal to obtain the amplified analog audio signal;

[0087] The audio output module 110 is used to transmit the amplified analog audio signal to the target audio device 111.

[0088] In this optional embodiment, optionally, such as Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a digital-to-analog converter module disclosed in an embodiment of the present invention. The components included in the digital-to-analog converter module 108 and the connection methods between these components can be as follows: Figure 6As shown. The digital-to-analog converter module 108, or D / A converter, primarily converts digital signals into analog signals. For example, in industrial automation, the D / A converter can convert computer-generated control signals into analog signals to drive actuators such as motors and valves. In instrumentation, it can convert digital display values ​​into analog outputs for more accurate measurement and calibration. Furthermore, the D / A converter module can be composed of a CS4344 chip and peripheral circuitry, or an HT5010 chip and peripheral circuitry. The CS4344 chip includes a 10-pin, 24-bit, 192kHz stereo digital-to-analog converter (DAC). It is a complete stereo digital-to-analog output system, including interpolation, multi-bit D / A conversion, and output analog filtering functions. The CS4344 supports major audio data interface formats such as I2S and has the ability to automatically detect sampling rates up to 192kHz.

[0089] In this optional embodiment, optionally, after the video matrix processing module 103 performs signal processing operation on the second video signal of the second type, it can obtain the third video signal of the second type and the digital audio signal, that is, it can obtain the HDMI type video signal and the de-embedded IIS digital signal. The D / A conversion module converts the IIS digital signal into an analog signal and outputs the analog signal to the signal amplification module 109.

[0090] In this optional embodiment, optionally, such as Figure 7 As shown, Figure 7 This is a schematic diagram of a signal amplification module disclosed in an embodiment of the present invention. The components included in the signal amplification module and the connection methods between these components can be as follows: Figure 7As shown, the signal amplification module 109 comprises a dual-power operational amplifier (op-amp) sub-circuit TL082 and peripheral sub-circuits. The TL082 sub-circuit is a dual op-amp integrated circuit with a gain-bandwidth product (Typ) of 3MHz, meaning it can maintain stable amplification performance over a wide frequency range. Furthermore, the TL082 features low offset current and low input bias current, which helps reduce noise and distortion in the circuit. The signal amplification module 109 may include an OPAMP circuit, which is a common integrated circuit device in electronic circuits. An OPAMP circuit mainly consists of an input stage, a differential amplifier stage, and an output stage. The input stage provides high input impedance and differential input functionality for the differential amplifier, amplifying the input signal. The output stage converts the amplified voltage into current output. Furthermore, the differential input of the operational amplifier can accept two input signals: a positive-inverting input and a negative-inverting input. By amplifying the difference between the two input signals, the operational amplifier can amplify the differential signal. This differential input design allows the operational amplifier to cancel out some noise and interference in practical applications, thereby improving signal quality. Furthermore, the operational amplifier has a very high amplification factor, reaching thousands or even tens of thousands of times. This enables the operational amplifier to amplify weak input signals to a sufficiently large amplitude for processing by subsequent circuits. Additionally, the high amplification factor allows the operational amplifier to provide stable gain in negative feedback circuits.

[0091] In this optional embodiment, the analog signal output by the D / A conversion module is amplified by the operational amplifier TL082 to obtain an amplified analog audio signal, and the amplified analog audio signal is transmitted to the audio output module 110 for output through the target audio device 111, which may include devices capable of playing audio information such as smart headphones, smartphones, smart computers, smart tablets, smart radios, and smart players.

[0092] In this optional embodiment, the audio output module 110 may optionally include a 3.5mm audio output module, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a 3.5mm audio output module disclosed in an embodiment of the present invention. The components included in the 3.5mm audio output module and the connection methods between these components can be as follows: Figure 8 As shown, the 3.5mm audio output module may include a 3.5mm audio jack interface. Furthermore, the target audio device connected to the 3.5mm audio jack interface may include one or more smart headphone devices, smart playback devices, etc. This embodiment of the present invention does not impose specific limitations.

[0093] As can be seen, implementing this optional embodiment can intelligently separate video and audio to adapt to different video display or audio output requirements. The digital-to-analog converter (DAC) performs a digital-to-analog conversion on the de-embedded digital audio signal to obtain an analog audio signal, enhancing the system's signal compatibility. This allows the system to handle various input signal formats and effectively removes noise and interference from the original signal, thereby improving the signal-to-noise ratio and clarity of the audio signal. It also helps improve the accuracy and integrity of the audio signal, thus enhancing the quality of the output audio signal. Furthermore, the signal amplification module amplifies the analog audio signal, significantly increasing the strength of the output audio signal and bringing it to a level suitable for driving audio output devices. This improves signal compatibility and audio signal quality, enhances the system's flexibility and adaptability, and also improves the user experience.

[0094] In yet another alternative embodiment, such as Figure 5 As shown, the signal conversion-based input / output circuit further includes: a driver module 112, wherein:

[0095] The first end of the drive module 112 is electrically connected to the fourth end of the video matrix processing module 103, and the second end of the drive module 112 is used to be electrically connected to the fiber optic transmitter 113.

[0096] The drive module 112 is used to perform signal driving operations on the digital audio signal to obtain the target digital audio signal and transmit the target digital audio signal to the optical fiber transmitter 113.

[0097] In this optional embodiment, optionally, such as Figure 9 As shown, Figure 9 This is a schematic diagram of the structure of a drive module disclosed in an embodiment of the present invention. The components included in the drive module 112 and the connection methods between these components can be as follows: Figure 9As shown. The driver module 112 is used to perform signal driving operations on the digital audio signal to obtain the target digital audio signal. The driver module 112 includes an SPDIF driver circuit module, which is a circuit module specifically designed to drive SPDIF signals. SPDIF is a digital audio transmission interface standard, typically used to transmit compressed audio signals, such as AC3 signals, or to transmit raw audio signals from a CD player to an audio receiver. Furthermore, the SPDIF driver circuit module can amplify and drive the signal; that is, it can receive the SPDIF signal and amplify it to an appropriate level through its internal amplification circuit to drive subsequent audio devices or interfaces. It can also shape and stabilize the signal; that is, to ensure the accuracy and stability of the SPDIF signal, the driver circuit module typically shapes the signal to eliminate potential noise or distortion and ensure signal quality. Finally, the SPDIF driver circuit module can perform interface matching and conversion: it may also have interface matching and conversion functions to adapt to the connection requirements between different devices or systems. This ensures the accuracy and reliability of SPDIF signal transmission through the SPDIF driver circuit module included in the driver module 112, as well as the stability of the SPDIF signal transmission by the SPDIF driver circuit module, thereby providing a strong guarantee for high-quality output audio signals and audio experience.

[0098] In this optional embodiment, optionally, such as Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of an SPDIF audio output module disclosed in an embodiment of the present invention. The components included in the SPDIF audio output module and the connection methods between these components can be as follows: Figure 10 As shown. The SPDIF audio output module may include an optical fiber transmitter 113, also known as an optical fiber transmitter, which is an electronic device used for signal transmission. Its main function is to convert electrical signals into optical signals and transmit them into optical fibers. Furthermore, the optical fiber transmitter enables higher data transmission speeds, which is beneficial for improving data transmission efficiency and quality. Moreover, data transmission via the optical fiber transmitter enables long-distance data transmission and maintains high data transmission quality over long distances. The optical fiber transmitter can be connected to power amplifiers and other devices that support audio formats of two channels or higher, or Dolby format.

[0099] As can be seen, implementing this optional embodiment can perform signal amplification on the second sub-audio output signal transmitted by the video matrix processing module through the driving module to obtain the target digital audio signal, and transmit the target digital audio signal to the fiber optic transmitter. This achieves further processing and efficient transmission of the audio signal, and can output not only two-channel audio signals, but also multi-channel audio signals or Dolby format audio signals. This is beneficial to improving signal compatibility and audio signal quality, enhancing the system's flexibility and adaptability, and also improving the user experience.

[0100] In yet another alternative embodiment, such as Figure 5 As shown, the signal conversion-based input / output circuit further includes: a control module 114, which includes a control chip, an EDID DIP switch circuit, and a CEC circuit, wherein:

[0101] The first terminal of the control chip is electrically connected to the fifth terminal of the video matrix processing module 103, the second terminal of the control chip is electrically connected to the first terminal of the EDID DIP switch circuit, and the third terminal of the control chip is electrically connected to the CEC circuit.

[0102] In this optional embodiment, the control module 114 can be a microcontroller-based electronic control module, typically composed of an MCU and other auxiliary circuits, capable of performing various control, calculation, and data processing functions. The MCU controller typically includes modules such as a CPU, memory, input / output interfaces, timers, ADCs, and DACs. Through these modules, the MCU can achieve automated control, such as controlling the operation of motors, switches, lights, and other devices, meeting various automated control requirements. Furthermore, it can process various data, such as acquiring sensor data and processing sound and image data. In terms of communication, the MCU can communicate and control with other devices, such as exchanging data and communicating via serial ports, Ethernet, and wireless networks. Specifically, the control module can be composed of a GD32F330CBT6 chip with an ARM-M4 CPU core and 64KB of storage, along with peripheral circuits. The electrical connection between the control module 114 and the video matrix processing module 103 can include a connection via an IIC bus. IIC, also known as Inter-Integrated Circuit, is a two-wire serial bus developed by Philips for connecting microcontrollers and their peripheral devices. It is a synchronous, half-duplex, bidirectional two-wire serial bus consisting of two lines: a serial clock line (SCL) and a serial data line (SDA). The SCL line is responsible for generating the synchronous clock pulse, while the SDA line is responsible for transmitting serial data between devices.

[0103] In this optional embodiment, the control module 114 may optionally include a control chip, an EDID DIP switch circuit, and a CEC circuit. Optionally, the control chip may include a GD32F330CBT6 chip with an ARM-M4 CPU core and a storage capacity of 64KB.

[0104] And, such as Figure 11 As shown, Figure 11 This utility model discloses a schematic diagram of an EDID DIP switch circuit, wherein the components included in the EDID DIP switch circuit and the connection methods between the components can be as follows: Figure 11 As shown;

[0105] And, such as Figure 12 As shown, Figure 12 This is a schematic diagram of a CEC circuit disclosed in an embodiment of the present invention. The components included in the CEC circuit and the connection methods between these components can be as follows: Figure 12 As shown.

[0106] In this optional embodiment, the EDID DIP switch circuit can optionally be used to control the signal format of the video signal output by the video signal output module 105, and the signal format of the analog audio signal output by the audio output module 110. It can also control the signal format of the target digital audio signal output by the driver module 112. Specifically, when GPIO0 and GPIO1 of the EDID DIP switch circuit are both 1, the audio separation input / output circuit is in EDID COPY mode. In this mode, the EDID of the first external target device is copied, and the remaining multiple outputs are output according to the EDID of the first device. When GPIO0 and GPIO1 of the EDID DIP switch circuit are both 0, the audio separation input / output circuit is in EDID mode. In Compose mode, the EDID is compared, and the signal in the corresponding format is output adaptively according to the EDID of the target device. When the EDID DIP switch circuit GPIO0 is 0 and GPIO1 is 1, the signal distribution circuit with adaptive gain adjustment will output a fixed 4K or 2K signal. When the EDID DIP switch circuit GPIO0 is 1 and GPIO1 is 0, the signal distribution circuit with adaptive gain adjustment will output a fixed 8K signal.

[0107] In this optional embodiment, the CEC circuit is primarily involved in communication and control between HDMI interface devices. It is a bidirectional data signal with a high level of 3.3V. When the voltage level of the HDMI source controller chip differs from this level, level conversion is required, which can be achieved using a level conversion chip or an NMOS level conversion circuit. Furthermore, the CEC signal is typically an open-drain output from the HDMI source controller chip, thus requiring a pull-up resistor. Additionally, the CEC bus can transmit addresses, commands, and data over a single cable, thereby enabling control of all devices connected to the HDMI interface.

[0108] As can be seen, implementing this optional embodiment can connect the control module to the video matrix processing module and determine the output audio signal format corresponding to the video signal, so that the video matrix processing module can perform target processing operations on the video signal to obtain an audio output signal that matches the output audio signal format. This can ensure the format matching of the video signal and the audio signal at output. By ensuring the format matching of the two, the accuracy and smoothness of audio and video synchronous playback can be significantly improved.

[0109] In yet another alternative embodiment, the control module 114 further includes a selection circuit, wherein:

[0110] The first terminal of the selection circuit is electrically connected to the fourth terminal of the control chip;

[0111] The selection circuit is used to receive control commands from the user to select the type of signal output.

[0112] In this optional embodiment, optionally, such as Figure 13 As shown, Figure 13 This is a schematic diagram of a selection circuit disclosed in an embodiment of the present invention. The components included in the selection circuit and the connection methods between these components can be as follows: Figure 13 As shown. Optionally, the first terminal of the selection circuit is electrically connected to the fourth terminal of the control chip. This selection circuit can be an LED selection circuit based on LED indicator lights. The selection circuit is used to receive control commands input by the user for selecting the signal output type. Specifically, the user can select the corresponding channel through the button in the LED selection circuit and transmit it to the control module 114 so that the control module 114 knows the output video or audio signal format corresponding to the video signal. For example, when the selected channel is LED1, the level output by the LED selection circuit consists of a high level 1 and a low level 0. The output level enters the MCU's IO port to detect the current state. For example, when all four DIP switches are set to high level, the output is 1111, and the output audio signal format corresponding to the video signal is determined to be PC Control Mode.

[0113] As can be seen, implementing this optional embodiment allows the selection circuit to receive control commands from the user for selecting the signal output type. The control chip then connects to the video matrix processing module and determines the output audio signal format corresponding to the video signal. This enables the video matrix processing module to perform target processing operations on the video signal to obtain an audio output signal that matches the output audio signal format. This ensures format matching between the video and audio signals at output. By ensuring format matching, the accuracy and smoothness of synchronized audio and video playback can be significantly improved.

[0114] In yet another optional embodiment, the first signal conversion module 102 includes a first signal conversion chip and a power supply circuit, and the second signal conversion module 104 includes a second signal conversion chip, wherein:

[0115] The first terminal of the first signal conversion chip is electrically connected to the second terminal of the video signal input module 101, the second terminal of the first signal conversion chip is electrically connected to the first terminal of the video matrix processing module 103, the third terminal of the first signal conversion chip is electrically connected to the power supply circuit, the first terminal of the second signal conversion chip is electrically connected to the second terminal of the video matrix processing module 103, and the second terminal of the second signal conversion chip is electrically connected to the first terminal of the video signal output module 105.

[0116] In this optional embodiment, the first signal conversion chip may consist of a DP1.4 to HDMI2.1 protocol conversion chip CH7218 and peripheral power supply circuits, while the second signal conversion chip may consist of an HDMI2.1 to DP1.4 protocol conversion chip LT6711GXE and peripheral circuits.

[0117] As can be seen, implementing this optional embodiment can convert the input DP video signal into an HDMI video signal through the first signal conversion module, which is convenient for the video matrix processing module to process and improve signal processing efficiency. The second signal conversion module converts the input HDMI video signal into a DP video signal, realizing multiple input and multiple output DP video signal switching and distribution, realizing 8K video signal output, improving video output clarity, and thus improving user convenience.

[0118] In yet another optional embodiment, the video signal input module 101 further includes a signal detection circuit, and the video signal output module 105 further includes a configuration switching circuit, wherein:

[0119] The first end of the signal detection circuit is electrically connected to the second end of the first ESD protection circuit combination, the second end of the signal detection circuit is electrically connected to the first end of the first signal conversion module 102, the first end of the configuration switching circuit is electrically connected to the second end of the second ESD protection circuit combination, and the second end of the configuration switching circuit is used to be electrically connected to the target display device 106.

[0120] A signal detection circuit for detecting first-type video signals;

[0121] A configuration switching circuit is used to detect the device type of the target display device and switch the output mode to match the device type.

[0122] In this optional embodiment, optionally, such as Figure 14 As shown, Figure 14 This is a schematic diagram of a signal detection circuit disclosed in an embodiment of the present invention. The components included in the signal detection circuit and the connection methods between these components can be as follows: Figure 14 As shown, the signal detection circuit can be used to detect the first type of video signal; as Figure 15 As shown, Figure 15 This is a schematic diagram of a configuration switching circuit disclosed in an embodiment of the present invention. The components included in the configuration switching circuit and the connection methods between these components can be as follows: Figure 15 As shown, the configuration switching circuit can be used to detect the device type of the target display device 106 and switch the output mode that matches the device type.

[0123] As can be seen, implementing this optional embodiment can improve the accuracy of video signal processing by identifying the type of input signal through the signal detection circuit, and improve the intelligence and flexibility of signal output by detecting the device type of the target display device through the configuration switching circuit and switching the output mode that matches the device type.

[0124] Example 2

[0125] Please see Figure 16 , Figure 16 This is a schematic diagram of an input / output matrix based on signal conversion disclosed in an embodiment of this utility model. The input / output matrix includes an input / output circuit based on signal conversion as described in any of the embodiments in Embodiment 1. This circuit converts DP video signals to HDMI video signals, processes the HDMI video signals through a video matrix processing module, and then converts the processed HDMI video signals back to DP signals for output. This enables multiple-input, multiple-output DP video signal switching and distribution, allowing multiple signals to be switched and distributed to multiple devices, achieving 8K video signal output, improving video output clarity, and thus enhancing user convenience. It should be noted that for a detailed description of the input / output matrix based on signal conversion, please refer to the specific description in Embodiment 1; this embodiment will not repeat it.

[0126] It is evident that implementation Figure 16The described signal conversion-based input / output matrix can achieve multiple input / output (MPD) video signal switching and distribution, switching and distributing multiple signals to multiple devices to achieve 8K video signal output, improve video output clarity, and thus improve user convenience.

[0127] The above provides a detailed description of an input / output circuit based on signal conversion disclosed in the embodiments of this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. However, the above preferred embodiments are not intended to limit this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, based on the idea of ​​this utility model, there will be changes in the specific implementation and application scope without departing from the spirit and scope of this utility model. Therefore, the protection scope of this utility model is determined by the scope defined in the claims.

Claims

1. An input / output circuit based on signal conversion, characterized in that, The circuit includes a video signal input module, a first signal conversion module, a video matrix processing module, a second signal conversion module, and a video signal output module, wherein: The first end of the video signal input module is used to input a first video signal of a first type. The second end of the video signal input module is electrically connected to the first end of the first signal conversion module. The second end of the first signal conversion module is electrically connected to the first end of the video matrix processing module. The second end of the video matrix processing module is electrically connected to the first end of the second signal conversion module. The second end of the second signal conversion module is electrically connected to the first end of the video signal output module. The second end of the video signal output module is used to be electrically connected to the target display device. The first signal conversion module is used to convert the first video signal of the first type into a second video signal of the second type; The video matrix processing module is used to perform signal processing operations on the second video signal of the second type to obtain the third video signal of the second type, and transmit the third video signal of the second type to the second signal conversion module; The second signal conversion module is used to convert the third video signal of the second type into the fourth video signal of the first type; The video signal output module is used to transmit the fourth video signal of the first type to the target display device; Furthermore, the video signal input module includes a first ESD protection circuit assembly, and the video signal output module includes a second ESD protection circuit assembly, wherein: The first terminal of the first ESD protection circuit assembly is used to input a first video signal of the first type; the second terminal of the first ESD protection circuit assembly is electrically connected to the first terminal of the first signal conversion module; the first terminal of the second ESD protection circuit assembly is electrically connected to the second terminal of the second signal conversion module; and the second terminal of the second ESD protection circuit assembly is used to be electrically connected to the target display device. The first ESD protection circuit assembly includes six first ESD protection circuits, and the second ESD protection circuit assembly includes six second ESD protection circuits.

2. The input / output circuit based on signal conversion according to claim 1, characterized in that, The circuit also includes a video signal processing module, wherein: The first end of the video signal processing module is electrically connected to the second end of the first signal conversion module, and the second end of the video signal processing module is electrically connected to the first end of the video matrix processing module. The video signal processing module is used for gain control of the compensation insertion loss of the second type of second video signal.

3. The input / output circuit based on signal conversion according to claim 1, characterized in that, The circuit also includes a digital-to-analog converter module, a signal amplification module, and an audio output module, wherein: The first end of the digital-to-analog converter module is electrically connected to the third end of the video matrix processing module, the second end of the digital-to-analog converter module is electrically connected to the first end of the signal amplification module, the second end of the signal amplification module is electrically connected to the first end of the audio output module, and the second end of the audio output module is used to electrically connect to the target audio device. The video matrix processing module performs signal processing operations on the second video signal of the second type to obtain the third video signal of the second type and the digital audio signal. The digital-to-analog conversion module is used to perform digital-to-analog conversion on the digital audio signal to obtain an analog audio signal; The signal amplification module is used to perform a signal amplification operation on the analog audio signal to obtain the amplified analog audio signal; The audio output module is used to transmit the amplified analog audio signal to the target audio device.

4. The input / output circuit based on signal conversion according to claim 3, characterized in that, The circuit also includes a driver module, wherein: The first end of the driving module is electrically connected to the fourth end of the video matrix processing module, and the second end of the driving module is used to be electrically connected to the optical fiber transmitter base. The driving module is used to perform signal driving operations on the digital audio signal to obtain the target digital audio signal, and transmit the target digital audio signal to the optical fiber transmitter.

5. The input / output circuit based on signal conversion according to claim 1 or 2, characterized in that, The circuit also includes a control module, which comprises a control chip, an EDID DIP switch circuit, and a CEC circuit, wherein: The first terminal of the control chip is electrically connected to the fifth terminal of the video matrix processing module, the second terminal of the control chip is electrically connected to the first terminal of the EDID DIP switch circuit, and the third terminal of the control chip is electrically connected to the CEC circuit.

6. The input / output circuit based on signal conversion according to claim 5, characterized in that, The control module further includes a selection circuit, wherein: The first terminal of the selection circuit is electrically connected to the fourth terminal of the control chip; The selection circuit is used to receive control commands input by the user for selecting the signal output type.

7. The input / output circuit based on signal conversion according to any one of claims 1-4, characterized in that, The first signal conversion module includes a first signal conversion chip and a power supply circuit, and the second signal conversion module includes a second signal conversion chip, wherein: The first terminal of the first signal conversion chip is electrically connected to the second terminal of the video signal input module, the second terminal of the first signal conversion chip is electrically connected to the first terminal of the video matrix processing module, the third terminal of the first signal conversion chip is electrically connected to the power supply circuit, the first terminal of the second signal conversion chip is electrically connected to the second terminal of the video matrix processing module, and the second terminal of the second signal conversion chip is electrically connected to the first terminal of the video signal output module.

8. The input / output circuit based on signal conversion according to any one of claims 1-4, characterized in that, The video signal input module further includes a signal detection circuit, and the video signal output module further includes a configuration switching circuit, wherein: The first terminal of the signal detection circuit is electrically connected to the second terminal of the first ESD protection circuit combination, the second terminal of the signal detection circuit is electrically connected to the first terminal of the first signal conversion module, the first terminal of the configuration switching circuit is electrically connected to the second terminal of the second ESD protection circuit combination, and the second terminal of the configuration switching circuit is used to be electrically connected to the target display device. The signal detection circuit is used to detect the first type of video signal; The configuration switching circuit is used to detect the device type of the target display device and switch the output mode that matches the device type.

9. The input / output circuit based on signal conversion according to any one of claims 1-4, characterized in that, The first video signal of the first type includes up to four DP video signals, the fourth video signal of the first type includes up to two DP video signals, and the fourth video signal of the first type includes DP signals with 8K resolution.

10. An input-output matrix based on signal conversion, characterized in that, The input / output matrix includes an input / output circuit based on signal conversion as described in any one of claims 1-9.

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