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Newbie
Newbie
213 Views
Registered: ‎09-18-2020

HDMI RX Timing Info Is Wrong

将摄像头输出通过一对HDMI Externder(HDMI 延长器)实现视频信号的远距离传输:发端盒子将HMDI信号编码,通过网线传输20米左右,收端解码成HDMI信号,输入到电视,可以正常显示;
但是上述场景,解码后接入到我们设备中(采用410T IP核实现信号的采集),Timing识别有问题,水平Timng信息识别正常,垂直Timing信息识别错误;
比如1080P30,采集到的Timing信息如下:
HActive =1920
HFrontPorch =88
HSyncWidth =44
HBackPorch =148
HTotal =2200
VActive =0
F0PVTotal =5
F1VTotal =1125
F0PVFrontPorch =5
F0PVSyncWidth =5
F1VFrontPorch =4
F1VSyncWidth =5
F1VBackPorch =36
各位大神帮忙看下,提供下思路,不胜感激;

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Xilinx Employee
Xilinx Employee
149 Views
Registered: ‎08-02-2007

@frank_404 

从你的timing看来,通常这种情况是由于Vsync和HSync的上升沿不对齐引起的,如果不对齐的话,HDMI Rx IP 会认为输入的Video是interlaced.所有垂直的timing F1正常而F0不对

你可以在ILA里面抓取所有Video Timing信号,用Vsync的上升沿触发,看看是否和Hsync对齐

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Xilinx Employee
Xilinx Employee
84 Views
Registered: ‎08-02-2007

@frank_404 

这个问题解决了吗?如果解决的话,请标注一下解决方案

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