I bought a Samsung UN55H7150. I have Comcast Basic TV service. I connect the cable box to the A/V input of the TV. I found sometimes the image of a moving object becomes very strange. For example, If a person's face is moving while he is talking, sometimes different parts of the face don't move synchronously. Some parts seem to move slower than others and it makes the picture look strange. Is this a problem in the TV's design or it can be fixed by adjust the settings?

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