pixellation on HDTV

[jonukas]

Whenever I watch anything in Hdtv I tend to get intermittent pixellation, and it is so annoying that I now, never switch over to it.
Has anyone got an answer to it, do I need a new ariel or maybe a booster ?

[KJN]

Pixellation is caused by low signal quality, could be aerial slightly out of alignment ,signal needs boosting, needs new aerial, try the cheapest first. (see if you can borrow a booster from somebody for a short while) if this does not work then its a aerial job. (guessing this is on Freeview?)