多种分辨率HDMI接口的TMDS信号转为LVDS格式实现方法研究

Research on Converting TMDS Signal of Multi-resolutions HDMI Interface to LVDS Format

为了将图像仿真系统输出的高清多媒体接口(High Definition Multimedia Interface,HDMI)最小化传输差分信号(Transition Minimized Differential Signaling,TMDS)转换为摄像头模组接口低电压差分信号(Low-Voltage Differential Signaling,LVDS),文章联合使用ITE68051芯片和现场可编程逻辑门阵列芯片(Field Programmable Gate Array,FPGA)实现了相应的转换。首先,将高清、超高清HDMI接口的TMDS信号通过ITE68051视频处理芯片进行TMDS解码,以双端口方式输出并行RGB数字信号;然后,应用FPGA易编程性的特点,将多种分辨率的RGB信号转换为相应的LVDS信号。联合应用ITE68051和FPGA芯片架构的转换系统,便于视频设备之间的兼容和系统后续升级,为自动驾驶仿真系统的视频信号输入提供了可靠的硬件接口通道。

In order to convert the High Definition Multimedia Interface(HDMI) output from the image simulation system to the Low-Voltage Differential Signaling(LVDS) of the camera module interface,this paper utilizes the ITE68051 chip combined with a Field Programmable Gate Array(FPGA) chip to implement the corresponding signal conversion.This article decodes the TMDS signals of high-definition and ultra-high definition HDMI interfaces through the ITE68051 video processing chip,and outputs parallel RGB digital signals in a dual port manner;Then,by utilizing the programmable nature of FPGA,RGB signals with multiple resolutions are converted into corresponding LVDS signals.This video format conversion system facilitates compatibility with different video devices and subsequent system upgrades.At the same time,it provides a reliable hardware interface channel for the video signal input of the autonomous driving simulation system.