I have a Screenplay 4805, I-scan HD and Yamakawa 365 which I use to produce a thoughroughly satisfying picture via DVI-D. I get 1:1 on the I-scans tests with 854x480. This led me to wonder if pushing the digits out of the Yam at 480p would drop a step out of the processing done to deliver the image, or would it simply move it from the best place to have the conversion done (presumably the I-scan) to the DVD player. That made me realise that I don't know where the instructions are that give the image size, framerate etc. or in what form they are passed from device to device. Obviously DVI-D is digital but how 'formed' is the bitstream when its read off the disc? I've always presumed that these instructions are encoded on the disc and the hardware merely does as its told but until recently I've not had kit that could convert formats. I mostly watch PAL R2 material. I've found that swapping between formats - including custom on the Yam - produces very minor changes and that the condition of the source material ususally designates what I end up using. The worst looking DVDs get sent via RGBs from my other DVD player which is a lot kinder to their faults.