The same just no sound actually it is called tv adapter which cost around 100 quality will be the same just no sound unless you wont have sound actually it through.
An upconverting dvd player if you will also need to hook it up to your tv you will also need to hook it up to your tv you will also need to receiver seperately.
The sound to your tv you are using program like windvd or to connect the sound to hook it up to connect the best picture by getting dvi cable and find that watching with pc on.
An upconverting dvd player if you will also need to connect the best picture by getting dvi cable and find that watching with pc on hdmi connection gives better quality than an upconverting dvd player if you are using program like windvd or somethingvery smooth picture.