What tier are you paying for and is this thru a cable box or a direct connection?
Does it fill the full screen or is it letterboxed?
does your system still run lo res on xx channels and HD on -1xxx channels?
AMC/ TV land/ Grit, MeTv run a lot of old analog movies that are poor quality video of films. Your beef may be with them not the cable co's
We are on 3 different head ends and it's doubtfull they are configured/ connected the same....
In most cases, the IPTV streams are of better quality than the cable box images.
The question I forgot to ask is "where are you?"