07-01-2023, 10:24 AM
I’m sure I remember seeing black and white lines like this at the top left of the screen on some channels in the early days of digital TV.
If I remember correctly, they acted as a l signal for some boxes to switch aspect ratios between 16:9 and 4:3.
If I remember correctly, they acted as a l signal for some boxes to switch aspect ratios between 16:9 and 4:3.