HDMI and SDI modular interface based on USB TYPE-C

Abstract

The invention relates to the technical field of modular systems, in particular to an HDMI (High Definition Multimedia Interface) and SDI (Serial Digital Interface) modular interface based on USB TYPE-C. The HDMI and SDI modular interface comprises a core processor module and a modular interface module, the modular interface module is of a replaceable structure and comprises an HDMI interface module and an SDI interface module, the core processor module automatically matches a signal processing program of a corresponding module by identifying a level state of a USB TYPE-C specific pin, so as to realize the function switching between the HDMI and the SDI; the HDMI interface and the SDI interface are designed into a replaceable modular structure, so that the purchase cost of equipment is effectively reduced, subsequent upgrading is facilitated, the overall equipment is smaller in size and more convenient to carry and install, the maintenance cost is reduced, the downtime is shortened, meanwhile, the use flexibility of the equipment is further improved, and the service life of the equipment is prolonged. Meanwhile, the problems that equipment signal transmission is easy to interfere and poor in contact can be avoided, and the stability of video signal transmission is further improved.

Description

Technical Field

[0001] This invention relates to the field of modular system technology, and more specifically to a modular interface for HDMI and SDI based on USB TYPE-C. Background Technology

[0002] The HDMI and SDI modular interface based on USB TYPE-C is an interface conversion and adaptation device for video signal transmission. It is widely used in professional video fields such as live production, film and television shooting, security monitoring, equipment visualization monitoring, multimedia teaching, and conference systems. It enables signal communication between external video devices and display or storage devices, ensuring stable transmission of high-definition video signals. Devices that enable HDMI and SDI signal transmission are mainly divided into two categories: one is dedicated interface devices, which are single-function devices that integrate HDMI interfaces or only integrate SDI interfaces, such as HDMI video capture cards and SDI signal converters; the other is fixed devices that integrate dual interfaces, designing HDMI and SDI interfaces on the same hardware body, and selecting the working mode by manually switching buttons or software settings. When using dedicated interface equipment, if the scene needs to switch from HDMI signal to SDI signal, the entire set of equipment may need to be replaced, which increases the equipment purchase cost and carrying burden. This is especially inconvenient in scenarios such as mobile live streaming and outdoor shooting. Dual-interface fixed equipment hardware, the adapter circuits of the two types of interfaces occupy hardware space at the same time, resulting in a large device size. Moreover, when the adapter circuit of one of the interfaces fails, it may affect the normal operation of the entire device. The switching efficiency is relatively low. Manual switching or software settings require manual intervention. In scenarios with high real-time requirements, such as live signal switching, operation delays or even signal interruptions may occur, affecting the stability of video transmission. In view of this, we propose a modular interface for HDMI and SDI based on USB TYPE-C. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a modular HDMI and SDI interface based on USB TYPE-C, which effectively solves the problems of existing dedicated interface devices requiring complete device replacement for switching, high cost and poor flexibility, large size of dual-interface fixed devices, wide range of fault impact, low switching efficiency and easy signal loss.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a modular HDMI and SDI interface based on USB Type-C, including a core processor module and a modular interface module. The core processor module has a USB Type-C female connector, and one end of the modular interface module has a USB Type-C male connector adapted to the USB Type-C female connector. The modular interface module is a replaceable structure, including an HDMI interface module and an SDI interface module. The core processor module automatically matches the signal processing program of the corresponding module by recognizing the level state of specific pins of the USB Type-C interface, thereby realizing the switching between HDMI and SDI interface functions.

[0005] Furthermore, the core processor module includes a signal processing unit, a module identification unit, a power management unit, and a video decoding and encoding module. The module identification unit has a built-in A5 and B8 pin level detection circuit, which determines the type of the connected modular interface module by detecting the level signals of the A5 and B8 pins.

[0006] Furthermore, the HDMI interface module has an HDMI-A female connector at the end furthest from the USB TYPE-C male connector, and an internal HDMI signal adapter circuit is provided. The HDMI signal adapter circuit is used to achieve impedance matching and level conversion between the USB TYPE-C pin signals and the HDMI standard signals.

[0007] Furthermore, the SDI interface module has a BNC female connector at the end furthest from the USB TYPE-C male connector, and an internal SDI signal adapter circuit. The SDI signal adapter circuit adopts a 75Ω impedance design to achieve low-latency transmission and anti-interference processing of SDI signals.

[0008] Furthermore, the determination logic of the module identification unit is as follows: when the levels of pins A5 and B8 are both low, it is determined that the connected module is an SDI interface module; otherwise, it is determined by default that the connected module is an HDMI interface module.

[0009] Furthermore, the USB TYPE-C male connector pins of the HDMI interface module are defined as follows: pins A1, A12, B1, B12, and B8 are ground signals; pins A4, A5, A9, B4, and B9 are 5V power signals; pin A6 is the CEC verification signal; pin A7 is the HPD insertion detection signal; pins B6 and B7 are the SCL and SDA control signals; pins A2 and A3 correspond to the HDMI-DATA0+ / - signal; pins A10 and A11 correspond to the HDMI-DATA1+ / - signal; pins B2 and B3 correspond to the HDMI-DATA2+ / - signal; pins B10 and B11 correspond to the HDMI-DATA3+ / - signal; and pins A8 and B5 are reserved and unused.

[0010] Furthermore, the USB TYPE-C male connector pins of the SDI interface module are defined as follows: pins A1, A12, B1, and B12 are ground signals, pins A8 and B5 are SDI data signals, pins A5 and B8 are ground signals, and the remaining unmentioned pins are insulated and encapsulated.

[0011] Furthermore, the signal processing unit of the core processor module is any one of the following IC chips: FPGA, CPU, GPU, MCU, or SOC.

[0012] Furthermore, the signal line impedance of the HDMI signal adapter circuit is controlled to be 100Ω±20%, and the CEC signal and HPD signal are equipped with opto-isolation structures.

[0013] Furthermore, the BNC female connector adopts a threaded locking design, with an insertion loss ≤0.5dB@2.97GHz, and supports SDI 3G and 6G standard signal transmission.

[0014] The technical solution provided by this invention has the following advantages compared with known public technologies: This invention designs HDMI and SDI interfaces as replaceable modular structures. The core processor module is compatible with both types of interface modules. Users do not need to purchase multiple sets of dedicated equipment for different interface scenarios. They only need to replace the interface modules according to their needs, which effectively reduces the equipment procurement cost. At the same time, the modular design of the modules facilitates subsequent upgrades. New video signal standards can be adapted without replacing the core hardware. The core processor module only retains general control and signal processing units, and the interface adapter circuit is integrated into an independent module, avoiding excessive hardware redundancy. This makes the overall device smaller, easier to carry and install. When an interface module fails, only the faulty module needs to be replaced, without repairing the entire device, which reduces maintenance costs and downtime. At the same time, it further improves the flexibility of the device. By setting up A5 and B8 pin level detection circuits in the core processor module, the type of the connected interface module can be automatically identified and the corresponding signal processing program can be matched. No manual operation is required throughout the process, and the switching response is rapid, effectively avoiding the risk of signal interruption in real-time scenarios and improving work efficiency. In addition, dedicated adapter circuits are designed in the corresponding modules for the transmission characteristics of HDMI and SDI signals. The HDMI module suppresses interference through impedance matching and opto-isolation structure, while the SDI module ensures signal integrity through 75Ω impedance design and threaded locking interface, which can avoid the problems of device signal transmission being susceptible to interference and poor contact, further improving the stability of video signal transmission. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall system architecture of the present invention; Figure 2 This is the pin mapping table for HDMI module group A of the present invention; Figure 3 This is the pin mapping table for HDMI module group B of the present invention; Figure 4 This is the pin mapping table for group A of the SDI module of the present invention; Figure 5 This is the pin mapping table for Group B of the SDI module of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments.

[0019] like Figures 1 to 5As shown, a modular HDMI and SDI interface based on USB Type-C includes a core processor module and a modular interface module. The core processor module has a USB Type-C female connector, and one end of the modular interface module has a USB Type-C male connector adapted to the USB Type-C female connector. The modular interface module is a replaceable structure and includes an HDMI interface module and an SDI interface module. The core processor module identifies the USB... The signal processing program of the corresponding module is automatically matched with the level state of specific TYPE-C pins to realize the switching between HDMI and SDI interface functions. The core processor module includes a signal processing unit, a module identification unit, a power management unit, and a video decoding and encoding module. The module identification unit has a built-in A5 and B8 pin level detection circuit. The module identification unit determines the type of the connected modular interface module by detecting the level signals of the A5 and B8 pins. The determination logic of the module identification unit is as follows: when the level of both A5 and B8 pins is low, it is determined that the connected interface module is an SDI interface module. In other cases, it is determined that the connected interface module is an HDMI interface module by default. The signal processing unit of the core processor module can be any IC chip from FPGA, CPU, GPU, MCU, or SOC. The core processor module adopts an FPGA + auxiliary chip hardware architecture, and the overall size is designed to be 100mm×80mm, which is suitable for industrial-grade equipment installation requirements. It should be noted that the signal processing unit uses the Xilinx-Artix-7 series FPGA chip with model XC7A35T, which supports real-time decoding and encoding of multi-format video signals. It is compatible with HDMI 2.0 and SDI 3G and 6G standards at the same time, meeting the transmission requirements of 4K@60fps video. If cost reduction is required, it can also be replaced with STM32H7 series MCU, which is suitable for medium and low bandwidth scenarios of 1080P@30fps. Furthermore, the core of the module identification unit is the A5 and B8 pin level detection circuit, which consists of two S9013 NPN transistors, two 1kΩ current-limiting resistors, and one 5.1kΩ pull-up resistor. When the modular interface module is inserted, if both A5 and B8 pins are grounded through the module's internal circuitry, the transistors are cut off, and the pull-up resistors output a high level to the FPGA's GPIO pins. The FPGA determines that the connected module is an SDI interface module. If A5 pin is 5V and B8 pin is grounded, the transistors are turned on and output a low level. The FPGA defaults to determining that the module is an HDMI interface module. The response time of this determination logic is ≤10ms, ensuring that there is no delay in interface switching. Furthermore, the power management unit uses an RT9193-5.0V regulator with an input voltage range of 9-12V and an output current of up to 1A, providing a stable 5V power supply for the USB TYPE-C female connector. At the same time, it uses a TVS diode of model SMBJ5.0CA to achieve overvoltage protection, avoiding damage to the core chip caused by voltage fluctuations when the modular interface module is plugged in and out. Specifically, the HDMI interface module has an HDMI-A female connector at the end furthest from the USB Type-C male connector. Internally, it includes an HDMI signal adapter circuit. This circuit is used to achieve impedance matching and level conversion between the USB Type-C pin signals and the HDMI standard signals. The TYPE-C male connector pinout is defined as follows: pins A1, A12, B1, B12, and B8 are ground signals; pins A4, A5, A9, B4, and B9 are 5V power signals; pin A6 is the CEC verification signal; pin A7 is the HPD insertion detection signal; pins B6 and B7 are the SCL and SDA control signals; pins A2 and A3 correspond to HDMI-DATA0+ / - signals; pins A10 and A11 correspond to HDMI-DATA1+ / - signals; pins B2 and B3 correspond to HDMI-DATA2+ / - signals; pins B10 and B11 correspond to HDMI-DATA3+ / - signals; pins A8 and B5 are reserved and unused. The signal line impedance of the HDMI signal adapter circuit is controlled at 100Ω±20%, and the CEC and HPD signals are equipped with opto-isolation structures. The overall size of the HDMI interface module is 50mm×30mm, and it uses a 1.6mm thick FR-4 epoxy glass cloth substrate. It should be noted that the USB TYPE-C male connector uses the TE-Connectivity 1799818-1 model, with all 24 pins using a brass gold-plated process to reduce contact resistance to ≤30mΩ and ensure signal transmission stability. The connection between pins A2 and A3 and the HDMI-DATA0+ / - signal uses AWG28 differential twisted pair cable with an impedance of 100Ω±10% and a twisted pair length controlled at 50mm±2mm to avoid signal delay difference exceeding 50ps, which would affect HDMI video synchronization. Furthermore, in the impedance matching section of the HDMI signal adapter circuit, a 100Ω±1% precision resistor in a 0402 package (RC0402JR-07100RL) is connected in series between the A2, A3 and other video data pins and the HDMI-A female connector. A 100pF high-frequency capacitor (GRM1555C1H101JA01D) is connected in parallel across the pins to suppress high-frequency signal reflection and stabilize the signal line impedance at 100Ω±20%. For the CEC verification signal and HPD insertion detection signal, a TLP181 high-speed optocoupler is used. A 220Ω current-limiting resistor is connected in series at the input of the optocoupler, and a 1kΩ pull-up resistor is connected in parallel at the output. This achieves electrical isolation between the core processor module and the external HDMI device, avoiding ground loop interference from external devices, such as common-mode noise from TVs and monitors, from entering the core chip. It also prevents external high voltage, such as electrostatic discharge, from damaging the FPGA. Furthermore, the HDMI-A female connector uses JAE's HDMI-AT-HF model, with 19 pins featuring a locking design. The locking mechanism is made of ABS plastic and engages with the groove of the HDMI male connector during insertion. The insertion and removal force is controlled at 30-50N to prevent the interface from falling off due to equipment vibration, making it suitable for industrial environments. Specifically, the SDI interface module has a BNC female connector at the end furthest from the USB TYPE-C male connector. Internally, it includes an SDI signal adapter circuit with a 75Ω impedance design for low-latency SDI signal transmission and interference suppression. The USB TYPE-C male connector pinouts are defined as follows: A1, A12, B1, and B12 are ground signals; A8 and B5 are SDI data signals; A5 and B8 are ground signals; and the remaining unmentioned pins are insulated. The BNC female connector uses a threaded locking design with an insertion loss ≤0.5dB@2.97GHz, supporting SDI 3G and 6G standard signal transmission. The SDI interface module has the same dimensions as the HDMI interface module, 50mm × 30mm. It should be noted that among the pins of the USB TYPE-C male connector, pins A8 and B5 are connected to the BNC female connector using an RG174 coaxial cable. The coaxial cable shielding layer is a tin-plated copper mesh to reduce the impact of external electromagnetic interference, such as radio frequency signals and motor noise, on the SDI signal. The remaining unused pins are encapsulated with insulating tape to avoid short circuits between pins and to prevent dust from entering the module. Furthermore, the SDI signal adapter circuit uses an AD8045 high-speed operational amplifier to convert the 3.3V LVCMOS level output from the USB TYPE-C pin into an 800mVpp differential signal of the SDI standard. The amplifier bandwidth is ≥500MHz to ensure that the SDI 6G signal is distortion-free. A 75Ω CRCW060375R0FKEA terminating resistor in a 0603 package is connected in series in the circuit to match the coaxial line impedance and avoid image ghosting caused by signal reflection. Furthermore, the threaded locking design of the BNC female connector uses Switchcraft's BNC-5001 model, with a zinc alloy shell and an internal M16×1.5 coarse thread. After the matching BNC male connector is inserted, rotating the male connector's nut engages with the female connector's thread, ensuring tight contact between the male and female connector core wires with a contact resistance of ≤5mΩ. In professional video scenarios, such as live streaming and monitoring, where equipment often needs to be moved or vibrated, the threaded locking design prevents signal interruption caused by loosening of the BNC male connector. At the same time, coarse threads are easier and faster to lock than fine threads, improving on-site installation efficiency.

[0020] The working principle of this invention is as follows: After the core processor module is initialized and the system is connected to a 9-12V external power supply, the power management unit of the core processor module starts up. The RT9193-5.0V regulator is used to convert the input voltage into a stable 5V output. At the same time, overvoltage protection is achieved through the SMBJ5.0CA TVS diode to avoid damage to the internal chips by voltage fluctuations. The signal processing unit loads the basic firmware, completes the GPIO pin configuration and video protocol initialization, and presets the A5 and B8 pins of the USBTYPE-C female connector to a high level through a 5.1kΩ pull-up resistor, waiting for the modular interface module to be connected; The USB TYPE-C male connectors of the HDMI interface module and the SDI interface module are in the ready-to-connect state. The A5 pin of the HDMI module is pre-connected to the 5V power supply line and the B8 pin is pre-connected to the ground line. The A5 and B8 pins of the SDI module are pre-connected to the ground line. The unused pins of both types of modules are encapsulated with 3M1350F-1 insulating tape to prevent short circuits and dust intrusion, and to ensure stable pin function when connected. Users can choose HDMI or SDI modules according to their needs, and insert them into the female connector of the core processor module along the USB TYPE-C foolproof direction. After insertion, the male and female pins are connected one by one to form three types of circuits. The 5V power supply of the core processor module supplies power to the interface module through pins A4, A5, A9, B4, B9, etc. or reserved power supply lines. The video signal pins of the interface module are connected to the signal input pins of the core processor module. The A5 and B8 pins of the interface module are connected to the module identification unit detection circuit of the core processor module. The module identification unit has a built-in level detection circuit consisting of two S9013 NPN transistors and two 1kΩ current-limiting resistors. The A5 and B8 pins of the SDI module are grounded. After insertion, the level of both pins is low. There is no sufficient current at the base of the transistors, so they remain in the cutoff state. There is no current drop in the pull-up resistors. The output is a double high-level signal to the GPIO pin of the FPGA. After the FPGA recognizes the signal combination, it determines that the SDI module is connected and immediately loads the SDI signal processing program. The response time is ≤10ms. The A5 pin of the HDMI module is a 5V power supply signal, and the B8 pin is a ground signal. After insertion, a high level on the A5 pin will saturate and turn on the corresponding transistor, and a low level on the B8 pin will turn off the corresponding transistor. The turned transistor will pull the collector potential down to 0V and output a low-high level signal to the FPGA. The FPGA will automatically switch to the HDMI 2.0 processing program by default. External HDMI devices, such as laptops and set-top boxes, are connected to the module via an HDMI-A female connector. The female connector latch is made of ABS plastic and engages with the male connector groove of the device through a snap-fit ​​mechanism. The insertion and removal force is 30-50N to prevent vibration from causing it to fall off. At the same time, the A7 pin changes from low level to high level, and the FPGA starts preparing for video reception after receiving the signal. The HDMI signal output from the external device enters the HDMI signal adapter circuit. The video data pins A2 / A3 (DATA0+ / -), A10 / A11 (DATA1+ / -), B2 / B3 (DATA2+ / -), and B10 / B11 (DATA3+ / -) are connected using AWG28 differential twisted-pair cable. A 100Ω±1% precision resistor of type RC0402JR-07100RL in 0402 package is connected in parallel, and a 100pF high-frequency capacitor of type GRM1555C1H101JA01D is connected in parallel to suppress high-frequency signal reflection and stabilize the signal line impedance at 100Ω±20%, which complies with the HDMI standard. Pins A6 and A7 are electrically isolated via a TLP181 high-speed optocoupler. A 220Ω current-limiting resistor is connected in series at the input of the optocoupler, and a 1kΩ pull-up resistor is connected in parallel at the output to avoid ground loop noise from external devices, such as common-mode interference from the display, from entering the FPGA. This also prevents electrostatic discharge from damaging the core chip. The SCL and SDA control signals of pins B6 and B7 are directly transmitted to the FPGA's I2C interface to achieve device resolution negotiation and control command interaction. The adapted HDMI signal is transmitted to the FPGA, converted into parallel RGB video data by the built-in decoding module, and then encoded according to the requirements of downstream devices. Finally, a video signal conforming to 4K@60fps or 1080P@30fps is output, completing the closed loop of HDMI interface function. External SDI devices, such as cameras and live encoders, are connected to the module via BNC female connectors. The female connector shell is made of zinc alloy with nickel plating and has an internal M16×1.5 coarse thread. After the external BNC male connector is inserted, the male connector nut is rotated to engage with the female connector thread, ensuring that the male connector core wire and the female connector core wire are in close contact with each other. The contact resistance is ≤5mΩ, making it suitable for mobile and vibration scenarios. The SDI signal output from the external device is transmitted via the RG174 coaxial cable to the A8 and B5 pins of the USB TYPE-C male connector, and enters the SDI signal adapter circuit. The AD8045 high-speed operational amplifier is used to convert the 3.3V LVCMOS level output from the USB TYPE-C pin to the 800mVpp differential signal of the SDI standard, ensuring that the SDI 6G signal is distortion-free. The circuit uses a CRCW060375R0FKEA type 75Ω terminating resistor in series with a 0603 package, which is fully matched with the coaxial line impedance to avoid image ghosting caused by signal reflection. The insertion loss is ≤0.5dB@2.97GHz, meeting the 3G and 6G standard requirements of SDI. The adapted SDI signal is transmitted to the FPGA, where it is parsed into raw video data by the SDI decoding module. Depending on the application scenario, such as live streaming or local storage, it is encoded or forwarded directly with a transmission delay of ≤1ms, which meets the real-time requirements of professional video fields. When the interface type needs to be changed, simply unplug the current module: after unplugging, pins A5 and B8 return to high level, the FPGA detects the signal change and immediately pauses the signal processing program of the current module; after inserting the new module, the system automatically repeats the process from level recognition to program loading and then to signal adaptation, without restarting the device, thus realizing quick switching between HDMI and SDI functions; If the external input voltage exceeds 12V, the TVS diode will conduct instantaneously to absorb the overvoltage energy, protecting the power management unit and FPGA. If the module is not fully inserted, the A5 and B8 pin levels will be abnormal, triggering an alarm on the FPGA to prompt the user to check the connection. The high coverage shielding layer of the SDI module's coaxial cable and the opto-isolation structure of the HDMI module can effectively suppress external electromagnetic interference and ensure stable signal transmission.

[0021] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular HDMI and SDI interface based on USB Type-C, comprising a core processor module and a modular interface module, wherein the core processor module is provided with a USB Type-C female connector, and one end of the modular interface module is provided with a USB Type-C male connector adapted to the USB Type-C female connector, characterized in that, The modular interface module is a replaceable structure, including an HDMI interface module and an SDI interface module. The core processor module automatically matches the signal processing program of the corresponding module by recognizing the level state of a specific pin of the USB TYPE-C, thereby realizing the switching between HDMI and SDI interface functions.

2. The modular HDMI and SDI interface based on USB TYPE-C according to claim 1, characterized in that, The core processor module includes a signal processing unit, a module identification unit, a power management unit, and a video decoding and encoding module. The module identification unit has a built-in A5 and B8 pin level detection circuit, which determines the type of the connected modular interface module by detecting the level signals of the A5 and B8 pins.

3. The modular HDMI and SDI interface based on USB TYPE-C according to claim 1, characterized in that, The HDMI interface module has an HDMI-A female connector at the end furthest from the USB TYPE-C male connector. It contains an HDMI signal adapter circuit, which is used to achieve impedance matching and level conversion between the USB TYPE-C pin signals and the HDMI standard signals.

4. The modular HDMI and SDI interface based on USB TYPE-C according to claim 1, characterized in that, The SDI interface module has a BNC female connector at the end furthest from the USB TYPE-C male connector. It contains an SDI signal adapter circuit with a 75Ω impedance design to achieve low-latency transmission and anti-interference processing of SDI signals.

5. A modular HDMI and SDI interface based on USB TYPE-C according to claim 1, characterized in that, The determination logic of the module identification unit is as follows: when the levels of pins A5 and B8 are both low, it is determined that the connected module is an SDI interface module; otherwise, it is determined by default that the connected module is an HDMI interface module.

6. A modular HDMI and SDI interface based on USB TYPE-C according to claim 3, characterized in that, The USB TYPE-C male connector pins of the HDMI interface module are defined as follows: A1, A12, B1, B12, and B8 are ground signals; A4, A5, A9, B4, and B9 are 5V power signals; A6 is the CEC verification signal; A7 is the HPD insertion detection signal; B6 and B7 are the SCL and SDA control signals; A2 and A3 correspond to the HDMI-DATA0+ / - signal; A10 and A11 correspond to the HDMI-DATA1+ / - signal; B2 and B3 correspond to the HDMI-DATA2+ / - signal; B10 and B11 correspond to the HDMI-DATA3+ / - signal; and A8 and B5 are reserved and unused.

7. A modular HDMI and SDI interface based on USB TYPE-C according to claim 4, characterized in that, The USB TYPE-C male connector pins of the SDI interface module are defined as follows: pins A1, A12, B1, and B12 are ground signals; pins A8 and B5 are SDI data signals; pins A5 and B8 are ground signals; and the remaining unmentioned pins are insulated and encapsulated.

8. A modular HDMI and SDI interface based on USB TYPE-C according to claim 2, characterized in that, The signal processing unit of the core processor module is any one of the following IC chips: FPGA, CPU, GPU, MCU, or SOC.

9. A modular HDMI and SDI interface based on USB TYPE-C according to claim 3, characterized in that, The signal line impedance of the HDMI signal adapter circuit is controlled at 100Ω±20%, and the CEC signal and HPD signal are equipped with opto-isolation structures.

10. A modular HDMI and SDI interface based on USB TYPE-C according to claim 4, characterized in that, The BNC female connector adopts a threaded locking design, with an insertion loss of ≤0.5dB@2.97GHz, and supports SDI 3G and 6G standard signal transmission.

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