What an improvement. No, in all seriousness now, things have changed a lot in the last few years.
Lets start at the beginning.
This results is bars appearing top and bottom of your screen especially on digital and dvd pictures. Hence people buy widescreen TVs to reduce this problem. Its nothing to worry about , if you don't understand, ring me or speak to a local dealer, it's purely and simply a better way of receiving TV pictures. Dolby, this is all about the sound. Dolby pro logic has a front left, front right, front centre and a rear channel for sound.