First, excuse my poor english

My DVD player can playback a lot of resolution, for example:

320 x (240 or 480)
384 x (240 or 480)
576 x (240 or 480)
640 x (240 or 480)... 8)

So, when i have calculated the bitrate that best fit for 1 or 2 CD, i can choose between several resolutions.
I wish establish a bitrate table, Based on 480x480@2542Kbps for each resolution, but it's seems to be non linear for the same quality...

Moreover, i have to choose between good horizontal or vertical resolution... What do you prefer and why ?


Thanx, Michel