Who can help novice please.

I have a Samsung HP - S5053 HDTV Samsung's 960 (frequency) DVD via HDMI cable, it should establish a sound player I became.
But when I play DVD movies or sports (and I see a lot of motorcycle racing). This picture does not seem sharp, because I think it should be.the main problem seems to be in the movie, its pot outside world, a large scene (in Saving Private Ryan, such as war scenes), or pixels of images into a blury and characters who, I get a "wet clay on the skin type of effect", which is norm? I look forward to too high? However, according to the Hong Kong Institute of Vocational Education to see high-definition image is incredible is that from my point of view, the establishment.
I have tried to set up 16:9 and 4:3 is true, sometimes to a little better, automatic settings, manual settings, but does not give a clear or wordy truly free image.
In fact, I could in my old CRT TV Sony davs 550, and a beter picture!

Any advice / help would be appreciated.