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CN-224233738-U - MIPI-LVDS video signal conversion bridging board card based on FPGA

CN224233738UCN 224233738 UCN224233738 UCN 224233738UCN-224233738-U

Abstract

The utility model discloses an MIPI-LVDS video signal conversion bridge plate card based on an FPGA, which comprises a video interface, a video source processing SOC, an FPGA bridging system, a video serial deserializer, an SDRAM module, an Ethernet transceiver, a crystal oscillator and a power management module, wherein the video interface is used for receiving and transmitting an external video source signal, the video source processing SOC is connected with the video interface and is used for processing the video signal and outputting an LVDS signal, the FPGA bridging system is connected with the video source processing SOC and is used for converting the LVDS signal into an MIPI signal, the video serial deserializer is used for converting the MIPI signal into a serial signal and outputting the serial signal to a device to be tested, the SDRAM module is used for caching video data, the Ethernet transceiver is used for remote control and program upgrading. Through the cooperation of the FPGA bridging system, the compatibility of various interface standards can be realized by utilizing the programmable characteristic of the FPGA bridging system, the problem of non-uniform interface standards among different devices is solved, the bridging board card can be connected with heterogeneous devices such as cameras and display modules in a seamless manner, the compatibility and the integration efficiency of an automobile electronic system are obviously improved, and the test flow is simplified.

Inventors

  • LI KAILIN

Assignees

  • 丰柯电子科技（上海）有限公司

Dates

Publication Date
20260512
Application Date
20250610

Claims (10)

  1. 1. An FPGA-based MIPI-LVDS video signal conversion bridge card, comprising: The video interface is used for receiving and transmitting an external video source signal; The video source processing SOC is connected with the video interface and is used for processing video signals and outputting LVDS signals; The FPGA bridging system is connected with the video source processing SOC and used for converting LVDS signals into MIPI signals; The video serial deserializer is connected with the FPGA bridging system and is used for converting the MIPI signal into a serial signal and outputting the serial signal to the equipment to be tested; the SDRAM module is connected with the video source processing SOC and the FPGA bridging system and used for caching video data; The Ethernet transceiver is connected with the video source processing SOC and the FPGA bridging system and used for remote control and program upgrading; the crystal oscillator is used for providing a clock reference for the video source processing SOC and the FPGA bridging system; and the power management module is used for providing stable power supply for each component.
  2. 2. The MIPI-LVDS video signal conversion bridge card based on an FPGA of claim 1, wherein the FPGA bridge system comprises an adaptive level conversion circuit for dynamically matching MIPID-PHY and LVDS electrical characteristic differences.
  3. 3. The MIPI-LVDS video signal conversion bridge card based on an FPGA of claim 2, wherein the self-adaptive level conversion circuit comprises a dynamic terminal matching module, and the terminal resistance value is automatically adjusted according to a high-speed mode or a low-power mode.
  4. 4. The MIPI-LVDS video signal conversion bridge card based on FPGA as claimed in claim 1, wherein the FPGA bridging system adopts multi-channel data processing to realize protocol conversion and data synchronization between 4 paths of MIPI data channels and LVDS.
  5. 5. The FPGA-based MIPI-LVDS video signal conversion bridge card as set forth in claim 1, wherein the FPGA bridge system is internally of a modular logic design, comprising: MIPI CSI-2/DSI protocol analysis module; An LVDS data encapsulation module; and an image processing module.
  6. 6. The MIPI-LVDS video signal conversion bridge card based on an FPGA of claim 1, wherein the video interface is a DisplayPort or HDMI interface.
  7. 7. The MIPI-LVDS video signal conversion bridge card based on FPGA of claim 1, wherein the video serial deserializer supports GMSL signal transmission and is connected with a device to be tested through a coaxial cable.
  8. 8. The MIPI-LVDS video signal conversion bridge card based on an FPGA as claimed in claim 1, wherein the Ethernet transceiver is a gigabit Ethernet interface for FPGA program remote burning and SOC control command transmission.
  9. 9. The MIPI-LVDS video signal conversion bridge card based on FPGA of claim 1, wherein the video source processing SOC is compatible with LVDS, displayPort, HDMI inputs by adopting a multi-protocol support chip.
  10. 10. The MIPI-LVDS video signal conversion bridge card based on FPGA of claim 1 further comprising an automated test platform for automated verification of signal integrity, timing synchronization, and protocol conversion functions of the bridge card.

Description

MIPI-LVDS video signal conversion bridging board card based on FPGA Technical Field The utility model relates to the technical field of signal conversion, in particular to an MIPI-LVDS video signal conversion bridge plate card based on an FPGA. Background With the rapid development of autopilot technology, vehicles increasingly rely on visual perception systems. The automobile electronic product is used as a core support of the automatic driving technology, and the performance and the compatibility of the automobile electronic product are directly related to the stability and the safety of the whole automatic driving system. Among the numerous components of automotive electronics, cameras and display modules play a vital role in capturing and visually presenting external environmental information to a driver or an autopilot system, thereby enabling accurate perception and decision-making of the surrounding environment of the vehicle. In automotive electronics, the camera and display module widely employ MIPI and LVDS interface standards. The MIPI interface is widely applied to mobile equipment and vehicle-mounted cameras due to the characteristics of low power consumption and high bandwidth, and the LVDS interface becomes a preferred standard of a vehicle-mounted display screen and a sensor by virtue of the advantages of high anti-interference capability and long transmission distance. However, with the continuous enrichment and diversification of functions of automotive electronics, the problem of non-uniformity of interface standards between different devices is increasingly highlighted. Not only is the difficulty of system integration increased, but also the testing process becomes complex and time-consuming, and further the marketing speed and the market competitiveness of the product are affected. In the prior art, system integration generally relies on Application-specific ASIC (Application-SPECIFIC INTEGRATED Circuit) bridge chips to implement MIPI and LVDS signal conversion. The chip realizes specific functions through the design of a curing circuit, and can meet basic requirements in specific scenes, but the limitation is obvious. First, ASIC chips have fixed functions and poor flexibility, and are difficult to accommodate for diverse interface requirements and rapidly changing technology standards. This means that once the design is completed, the ASIC chip is difficult to adjust or upgrade the functionality according to market demands or technical evolution. Second, ASIC's are expensive to design and manufacture, are very costly to build, and cannot accommodate small volume production or customization requirements. In the field of automotive electronics, different vehicle types or test systems have large differences in requirements on interface specifications, and an ASIC scheme is difficult to provide an economic and efficient solution. Disclosure of Invention The utility model overcomes the defects of the prior art and provides the MIPI-LVDS video signal conversion bridge plate card based on the FPGA. In order to achieve the purpose, the technical scheme adopted by the utility model is that the MIPI-LVDS video signal conversion bridge plate card based on the FPGA comprises: The video interface is used for receiving and transmitting an external video source signal; The video source processing SOC is connected with the video interface and is used for processing video signals and outputting LVDS signals; The FPGA bridging system is connected with the video source processing SOC and used for converting LVDS signals into MIPI signals; The video serial deserializer is connected with the FPGA bridging system and is used for converting the MIPI signal into a serial signal and outputting the serial signal to the equipment to be tested; the SDRAM module is connected with the video source processing SOC and the FPGA bridging system and used for caching video data; The Ethernet transceiver is connected with the video source processing SOC and the FPGA bridging system and used for remote control and program upgrading; the crystal oscillator is used for providing a clock reference for the video source processing SOC and the FPGA bridging system; and the power management module is used for providing stable power supply for each component. In a preferred embodiment of the present utility model, the FPGA bridge system includes an adaptive level shifter circuit for dynamically matching MIPID-PHY and LVDS electrical characteristic differences. In a preferred embodiment of the present utility model, the adaptive level shifter circuit includes a dynamic terminal matching module, and automatically adjusts the terminal resistance according to a high-speed mode or a low-power mode. In a preferred embodiment of the utility model, the FPGA bridging system adopts multi-channel data processing to realize protocol conversion and data synchronization between 4 paths of MIPI data channels and LVDS. In a preferred embodiment