You misunderstand my question：
1：if I use YPbPr, so HD mode for Ypbpr is no problem
2：now I use the HSYNC+VSYNC+RGB from other ic output，we use GR mode，7181c said that no valid signal，when we change to ypbpr mode（0001b），we can get video ，but the video seems overflow（eg.the rred part)？