Video processing system and FMC adapter plate

Abstract

The utility model discloses a video processing system and an FMC pinboard, and the FMC pinboard comprises an FMC interface, and also comprises an HDMI input interface; an HDMI output interface; the first HDMI driving module is connected between the HDMI input interface and the FMC interface; the second HDMI driving module is connected between the FMC interface and the HDMI output interface; and the first HDMI driving module and the second HDMI driving module respectively comprise a driving chip of which the model is NB7NQ621M. By implementing the technical scheme of the invention, 8K video transmission based on the HDMI 2.1 protocol can be supported, so that the FMC base plate can perform video processing on the 8K video signal.

Description

Technical Field

[0001] This utility model relates to the field of video processing, and in particular to a video processing system and an FMC adapter board. Background Technology

[0002] With technological advancements, 8K video will gradually become the standard for future media and content creation. 8K video is particularly important for large-screen TVs, displays, and projectors, allowing users to enjoy high-quality content on larger screens, suitable for home entertainment, commercial presentations, cinemas, and other occasions.

[0003] The FMC (FPGA Mezzanine Card) adapter board is a modular device for expansion. It features various types of interfaces and functional modules to flexibly meet diverse application needs and has a high-speed data channel suitable for high-bandwidth data processing. However, current FMC adapter boards only support up to 4K video transmission using the HDMI 2.0 protocol and do not support 8K video transmission based on the HDMI 2.1 protocol. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a video processing system and an FMC adapter board, addressing the aforementioned technical deficiencies in the existing technology.

[0005] The technical solution adopted by this application to solve its technical problem is: to construct an FMC adapter board, including a PCB board and an FMC interface disposed on the PCB board for connecting to an FMC base plate, the FMC adapter board further including the following disposed on the PCB board:

[0006] An HDMI input interface for connecting to external video source devices;

[0007] HDMI output interface for connecting to external video display devices;

[0008] A first HDMI driver module is connected between the HDMI input interface and the FMC interface, and is used to perform level matching processing on the HDMI signal received from the video source device through the HDMI input interface, and send it to the FMC base plate through the FMC interface for video processing.

[0009] A second HDMI driver module is connected between the FMC interface and the HDMI output interface, and is used to perform level matching processing on the HDMI signal received from the FMC base plate through the FMC interface, and send it to the video display device through the HDMI output interface.

[0010] The first HDMI driver module and the second HDMI driver module each include a driver chip with the model number NB7NQ621M.

[0011] Preferably, it also includes:

[0012] A first electrostatic discharge protection module is connected between the HDMI input interface and the first HDMI driver module;

[0013] A second electrostatic discharge (ESD) protection module is connected between the second HDMI driver module and the HDMI output interface.

[0014] Preferably, on the PCB board,

[0015] The lengths of the four differential HDMI signal cables between the HDMI input interface and the first HDMI driver module are equal.

[0016] The four differential HDMI signal cables between the first HDMI driver module and the FMC interface are of equal length.

[0017] The four differential HDMI signal cables between the FMC interface and the second HDMI driver module are of equal length.

[0018] The four differential HDMI signal lines between the second HDMI driver module and the HDMI output interface are of equal length.

[0019] Preferably, the differential impedance of each differential HDMI signal line is 100 ohms.

[0020] Preferably, it also includes:

[0021] It is connected to both the FMC interface and an external solid-state drive, and is used to send the video signal received from the solid-state drive to the FMC baseboard through the FMC interface for video processing, and to send the processed video signal received from the FMC baseboard through the FMC interface to the M2 interface of the solid-state drive.

[0022] Preferably, it also includes:

[0023] A filtering module connected between the video signal output terminal of the M2 interface and the video signal input terminal of the FMC interface.

[0024] Preferably, on the PCB board,

[0025] The four differential video signal lines between the video signal output terminal of the M2 interface and the video signal input terminal of the FMC interface are of equal length.

[0026] The four differential video signal lines between the signal output terminal of the FMC interface and the signal input terminal of the M2 interface are of equal length.

[0027] Preferably, it also includes:

[0028] A frequency conversion module is connected to the FMC interface, and the frequency conversion module performs frequency conversion on the basic clock signal input to the FMC baseboard through the FMC interface, and outputs the generated reference clock signal to the FMC baseboard through the FMC interface.

[0029] Preferably, the frequency conversion module includes a clock chip of model 8T49N21.

[0030] This utility model also constructs a video processing system, including an FMC base plate, and further comprising:

[0031] An FMC adapter plate connected to the FMC base plate, wherein the FMC adapter plate is the FMC adapter plate described above.

[0032] Through the technical solution of this application, the FMC adapter board uses a driver chip of model NB7NQ621M for level matching processing. This driver chip is a dual-mode four-channel driver chip that supports a maximum transmission rate of 12GBps in FRL mode and a maximum transmission rate of 6GBps in TMDS mode. Moreover, this driver chip can compensate for signal loss through gain flattening and equalization, which can solve the signal integrity reduction caused by PCB traces, transmission cables and inter-symbol interference. Therefore, the FMC adapter board can support 8K video transmission based on the HDMI 2.1 protocol, thereby enabling the FMC baseboard to perform video processing on 8K video signals. Attached Figure Description

[0033] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0034] Figure 1 This is a logical structure diagram of the FMC adapter board in one embodiment of this application;

[0035] Figure 2A This is a partial circuit diagram of the FMC adapter board in one embodiment of this application;

[0036] Figure 2B This is a partial circuit diagram of the FMC adapter board in one embodiment of this application;

[0037] Figure 2C This is a partial circuit diagram of the FMC adapter board in one embodiment of this application;

[0038] Figure 2D This is a partial circuit diagram of the FMC adapter board in one embodiment of this application;

[0039] Figure 2E This is a partial circuit diagram of the FMC adapter board in one embodiment of this application;

[0040] Figure 2F This is a partial circuit diagram of the FMC adapter board in one embodiment of this application;

[0041] Figure 2G This is a partial circuit diagram of the FMC adapter board in one embodiment of this application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Figure 1 This is a logic structure diagram of an FMC adapter board in one embodiment of this application. First, it is explained that the FMC adapter board is connected to the FMC baseboard (with an FPGA) and is used to preprocess the input video signal before sending it to the FMC baseboard for video processing. Figure 1As shown, the FMC adapter board of this embodiment includes a PCB board (not shown) and an HDMI input interface 11, an HDMI output interface 12, a first HDMI driver module 13, a second HDMI driver module 14, and an FMC interface 15 disposed on the PCB board. The HDMI input interface 11 is connected to an external video source device, such as a computer; the HDMI output interface 12 is connected to an external video display device; the first HDMI driver module 13 is connected between the HDMI input interface 11 and the FMC interface 15, and is used to perform level matching processing on the HDMI signal received from the video source device through the HDMI input interface 11, and send it to the baseboard for video processing through the FMC interface 15; the second HDMI driver module 14 is connected between the FMC interface 15 and the HDMI output interface 12, and is used to perform level matching processing on the HDMI signal received from the FMC baseboard through the FMC interface 15, and send it to the video display device through the HDMI output interface 12. Furthermore, the first HDMI driver module and the second HDMI driver module each include a driver chip of model NB7NQ621M.

[0044] Through the technical solution of this embodiment, since the FMC adapter board uses the NB7NQ621M driver chip for level matching processing, and this driver chip is a dual-mode four-channel driver chip, it supports a maximum transmission rate of 12GBps in FRL mode and a maximum transmission rate of 6GBps in TMDS mode. Moreover, this driver chip can compensate for signal loss through gain flattening and equalization, and can solve the signal integrity reduction caused by PCB traces, transmission cables and inter-symbol interference. Therefore, the FMC adapter board can support 8K video transmission based on the HDMI 2.1 protocol, thereby enabling the FMC baseboard to perform video processing on 8K video signals.

[0045] Furthermore, in an optional embodiment, on the PCB board, the four differential HDMI signal lines between the HDMI input interface 11 and the first HDMI driver module 13 are of equal length; the four differential HDMI signal lines between the first HDMI driver module 13 and the FMC interface 15 are of equal length; the four differential HDMI signal lines between the FMC interface 15 and the second HDMI driver module 14 are of equal length; and the four differential HDMI signal lines between the second HDMI driver module 14 and the HDMI output interface 12 are of equal length. Moreover, the differential impedance of each set of differential HDMI signal lines is 100 ohms. In this embodiment, to meet the 48Gbps bandwidth transmission requirement, the PCB design of the FMC adapter board follows the following principles: high-speed differential signal networks adopt an equal-length design with a differential impedance of 100 ohms, which avoids problems such as inconsistent signal timing and impedance. Additionally, it follows the principles of: a compact overall layout, ensuring that the longest HDMI high-speed signal trace is only 4100mil; reasonable arrangement of silkscreen placement; and strict control of signal line width and spacing.

[0046] Furthermore, such as Figure 1 As shown, the FMC adapter board of this application may further include an M2 interface 16 disposed on the PCB board. The M2 interface 16 is connected to both the FMC interface 15 and an external solid-state drive (SSD), and is used to send video signals received from the SSD to the FMC baseboard for video processing via the FMC interface 15, and to send the processed video signals received from the FMC baseboard via the FMC interface 15 to the SSD. This embodiment of the FMC adapter board adopts a dual-interface design of HDMI and M2, increasing its practicality.

[0047] Furthermore, in an optional embodiment, on the PCB board, the four differential video signal lines between the signal output terminal of the M2 interface 16 and the signal input terminal of the FMC interface 15 are of equal length; the four differential video signal lines between the signal output terminal of the FMC interface 15 and the signal input terminal of the M2 interface 16 are also of equal length. Moreover, the differential impedance of each set of differential video signal lines is 100 ohms. This avoids problems such as inconsistent signal timing and impedance uniformity.

[0048] Furthermore, such as Figure 1 As shown, the FMC adapter board of this embodiment may further include a frequency conversion module 17 disposed on the PCB board. The frequency conversion module 17 is connected to the FMC interface 15, and the frequency conversion module 17 performs frequency conversion on the basic clock signal input to the baseboard through the FMC interface 15, and outputs the generated reference clock signal to the baseboard through the FMC interface 15.

[0049] Furthermore, the frequency conversion module 17 includes a clock chip of model 8T49N21, which generates a high-precision clock signal to provide a reference clock for the GTH interface on the baseboard. Moreover, this clock chip supports dual clock output channels, providing reference clocks for both the HDMI and M.2 interfaces.

[0050] Furthermore, in an optional embodiment, the FMC adapter board of this application further includes a first electrostatic discharge (ESD) protection module, a second ESD protection module, and a filtering module disposed on the PCB board. The first ESD protection module is connected between the HDMI input interface and the first HDMI driver module; the second ESD protection module is connected between the second HDMI driver module and the HDMI output interface; and the filtering module is connected between the video signal output terminal of the M2 interface and the video signal input terminal of the FMC interface. In this embodiment, the two ESD protection modules can prevent damage to the FMC adapter board from static electricity and power surges, improving system stability and signal integrity. The filtering module can filter the video signal entering the FMC interface.

[0051] Combination Figure 2A , 2B The first HDMI driver module includes a driver chip U142 with model number NB7NQ621M. The first electrostatic discharge protection module 181 includes four sets of bidirectional Zener diodes. Among them, bidirectional Zener diodes D83 and D90 are connected between pins 7 and 9 of the HDMI input interface J3 and pins 5 and 4 of the driver chip U142, respectively; bidirectional Zener diodes D82 and D88 are connected between pins 4 and 6 of the HDMI input interface J3 and pins 8 and 7 of the driver chip U142, respectively; bidirectional Zener diodes D85 and D81 are connected between pins 1 and 3 of the HDMI input interface J3 and pins 11 and 10 of the driver chip U142, respectively; and bidirectional Zener diodes D84 and D89 are connected between pins 10 and 12 of the HDMI input interface J3 and pins 1 and 2 of the driver chip U142, respectively.

[0052] Combination Figure 2CThe second HDMI driver module includes a driver chip U119 with model number NB7NQ621M. The second electrostatic discharge protection module 182 includes four sets of bidirectional Zener diodes. Bidirectional Zener diodes D23 and D22 are connected between pins 24 and 23 of the driver chip U119 and pins 7 and 9 of the HDMI output interface J4, respectively. Bidirectional Zener diodes D25 and D24 are connected between pins 27 and 26 of the driver chip U119 and pins 4 and 6 of the HDMI output interface J4, respectively. Bidirectional Zener diodes D27 and D26 are connected between pins 30 and 29 of the driver chip U119 and pins 1 and 3 of the HDMI output interface J4, respectively. Bidirectional Zener diodes D21 and D1 are connected between pins 21 and 20 of the driver chip U119 and pins 10 and 12 of the HDMI output interface J4, respectively.

[0053] Combination Figure 2D , Figure 2E The filter module 19 includes four sets of capacitors. Capacitors C4 and C5 are connected between pins 49 and 47 of the M2 interface J5 and pins A34 and A35 of the FMC interface J2E, respectively. Capacitors C6 and C9 are connected between pins 37 and 35 of the M2 interface J5 and pins A38 and A39 of the FMC interface J2E, respectively. Capacitors C10 and C11 are connected between pins 25 and 23 of the M2 interface J5 and pins B36 and B37 of the FMC interface J2E, respectively. Capacitors C12 and C13 are connected between pins 13 and 11 of the M2 interface J5 and pins B32 and B33 of the FMC interface J2E, respectively.

[0054] Furthermore, combined Figure 2F , 2G The frequency conversion module uses a clock chip U132, model number 8T49N21. This clock chip U132 receives the base clock signal from the motherboard via pins 16 and 17, and receives frequency configuration signals for different modes (FRL mode, TMDS mode) from the motherboard via pins 11 and 12, thereby generating a high-precision clock signal. It also supports dual clock output channels, providing a reference clock for the HDMI interface via pins 22 and 23, and a reference clock for the M.2 interface via pins 9 and 8.

[0055] In addition, to resolve the conflict in the reference clock signal line usage of the GTH interface during M2 and HDMI transmissions, such as Figure 2GAs shown, resistors R23 and R22 can be connected between pins 22 and 23 of clock chip U132 and the corresponding clock terminals (GBTCLK1_M2C_P, GBTCLK1_M2C_N) of the FMC interface, respectively. Similarly, resistors R21 and R20 can be connected between pins 9 and 8 of clock chip U132 and the corresponding clock terminals (GBTCLK1_M2C_P, GBTCLK1_M2C_N) of the FMC interface, respectively. When transmitting HDMI signals via HDMI input or output interfaces, resistors R20 and R21 can be removed, while resistors R22 and R23 can be retained. When transmitting video signals via the M2 interface, resistors R22 and R23 can be removed, while resistors R20 and R21 can be retained. This resolves the conflicting issue of the reference clock signal line usage of the GTH interface during M2 and HDMI transmissions.

[0056] This application describes a video processing system, which includes an FMC base plate and an FMC adapter plate connected to each other. The structure of the FMC adapter plate is as described above and will not be repeated here.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An FMC adapter board, comprising a PCB board and an FMC interface disposed on the PCB board for connecting to an FMC base plate, characterized in that, The FMC adapter board also includes components disposed on the PCB board: An HDMI input interface for connecting to external video source devices; HDMI output interface for connecting to external video display devices; A first HDMI driver module is connected between the HDMI input interface and the FMC interface, and is used to perform level matching processing on the HDMI signal received from the video source device through the HDMI input interface, and send it to the FMC base plate through the FMC interface for video processing. A second HDMI driver module is connected between the FMC interface and the HDMI output interface, and is used to perform level matching processing on the HDMI signal received from the FMC base plate through the FMC interface, and send it to the video display device through the HDMI output interface. The first HDMI driver module and the second HDMI driver module each include a driver chip with the model number NB7NQ621M.

2. The FMC adapter board according to claim 1, characterized in that, It also includes the following set on the PCB board: A first electrostatic discharge protection module is connected between the HDMI input interface and the first HDMI driver module; A second electrostatic discharge (ESD) protection module is connected between the second HDMI driver module and the HDMI output interface.

3. The FMC adapter board according to claim 1, characterized in that, On the PCB board, The lengths of the four differential HDMI signal cables between the HDMI input interface and the first HDMI driver module are equal. The four differential HDMI signal cables between the first HDMI driver module and the FMC interface are of equal length. The four differential HDMI signal cables between the FMC interface and the second HDMI driver module are of equal length. The four differential HDMI signal lines between the second HDMI driver module and the HDMI output interface are of equal length.

4. The FMC adapter board according to claim 3, characterized in that, The differential impedance of each differential HDMI signal cable is 100 ohms.

5. The FMC adapter board according to any one of claims 1-4, characterized in that, It also includes those disposed on the PCB board: It is connected to both the FMC interface and an external solid-state drive, and is used to send the video signal received from the solid-state drive to the FMC baseboard through the FMC interface for video processing, and to send the processed video signal received from the FMC baseboard through the FMC interface to the M2 interface of the solid-state drive.

6. The FMC adapter board according to claim 5, characterized in that, It also includes those disposed on the PCB board: A filtering module connected between the video signal output terminal of the M2 interface and the video signal input terminal of the FMC interface.

7. The FMC adapter board according to claim 5, characterized in that, On the PCB board, The four differential video signal lines between the video signal output terminal of the M2 interface and the video signal input terminal of the FMC interface are of equal length. The four differential video signal lines between the signal output terminal of the FMC interface and the signal input terminal of the M2 interface are of equal length.

8. The FMC adapter board according to claim 5, characterized in that, It also includes the following set on the PCB board: A frequency conversion module is connected to the FMC interface, and the frequency conversion module performs frequency conversion on the basic clock signal input to the FMC baseboard through the FMC interface, and outputs the generated reference clock signal to the FMC baseboard through the FMC interface.

9. The FMC adapter board according to claim 8, characterized in that, The frequency conversion module includes a clock chip with model number 8T49N21.

10. A video processing system, comprising an FMC baseplate, characterized in that, Also includes: An FMC adapter plate connected to the FMC base plate, wherein the FMC adapter plate is the FMC adapter plate according to any one of claims 1-9.

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