I have an adv7391 with CVBS output, after configure PAL according to datasheet, I can get color bar display normally on general CRT monitor.
But when connect to some LCD monitor, there is abnorml diagonal cyclowarp.
After set the register 0x00 from 0x12 to 0x10, ie 2x oversampling to 16x oversampling.
The cyclowarp is gone.
I would like to know what is the oversampling for? Is it necessary requirement by some TV or signal standard ?