We use shaw gateway with a very high quality 58 inch TV
Some channels give excellent picture quality, for example CBC live news broadcasts are crystal clear with brilliant colour.
However, PBS broadcasts (KCTS) such as Masterpiece theatre are very disappointing. areas with colour gradations show discrete coloured patches instead of smooth transitions. This is particularly true when the subject matter is fairly dark, eg evening scenes.
How do you account for this difference? are we getting an inferior signal or lower resolution for some channels? We are not getting high quality on our favourite channels.