we have a blue ray player, and true hd tv large screen lcd tv, and i have noticed sometimes the movies on the hd channels are not always as clear or smooth as the blue ray. i know this may be a dumb question, but can someone clarify. for example, today i watched the fugitive in hd from the cable on demand, and the picture was ''''''shuddering'''''' more that usual in certain panning shots, like an overhead shot of a city looking downward from a helicopter. can someone shed some light on this? i have made sure the hdmi cables for both connections are of excellent quality.

thanks in advance