Using Fonts and Creating Line Art for Video
When creating line art or selecting a font to use in an interlaced broadcast video image,
avoid creating horizontal single-pixel lines. Also avoid using fonts that are too thin. Because
of the line-alternating nature of interlaced video, single-pixel lines flicker when the field
in which they appear turns on and off. This results in a buzzing effect in your graphics,
with the buzzing becoming more pronounced the closer the thin portions of graphics
or texture in your image come to the horizontal axis.
This problem can be mitigated by adding a bit of blur or antialiasing to your image.
Nonetheless, the best thing to do is to avoid single-pixel lines when creating graphics
for broadcast.