There is a huge discussion of this topic on the usenet video groups. Bottom line is use 720 x 480 x 16 (or higher) bit color and you should be fine. The actual image size is slightly larger than 480 but 480 is the visible area. Keep critical things away from the edges because each tv might be adjusted a little differently. Its worth burning a test dvd with your files to see how it looks. You may need some color correction for proper viewing on tv.