I am going to attempt to encode a 3D movie to a more economical size in order to test the various devices I have, but I'm not sure what the answers to the following questions are...
First, the three playback methods that I am going to try and cater for:
1. Acer 5738DZG Laptop - Passive (theater glasses/polarised) - native res. 1366x768
2. Gadmei p83 PMP - Autostereoscopic (parallax barrier) - native res. 1280x768
3. LG Optimus 3D Phone - Autostereoscopic (parallax barrier) - native res. 800x480
Question number 1 - What is the effective resolution in 3D for the three machines (i.e. the picture each eye sees)? My guess is:
1. 1366x384 (halved vertical res. as it's interleaved, left eye seeing odd lines, right eye seeing even...)
2. 640x768 (halved horizontal res. as it is parallax barrier), and
3. 400x480 (halved horizontal res. as it is parallax barrier)
Question number 2 - Which method should be used for the two different types of screen (polarised and parallax)? Looking on the internet it seems that SBS should be used, but I'm not sure if that is ideal.
For instance, why not use Over/Under for the polarised screen with the top half of the signal being used ONLY for the odd lines for the left eye stream and the bottom half being used ONLY for the even lines of the right eye stream? As the polariser chucks out half of each stream when it sends the picture why not get rid of them to begin with and then at least you're seeing eveything that you've encoded?
For Parallax, I get that SBS would be best, for much the same reason (you are losing the horizontal res.)
Question number 3 - What res. should I use for the best picture (making use of native res.) for each of the screens? My guesses would be:
1. 1366x768 picture in SBS (or just plain 720p) would be the most straightforward, but I guess the answer ultimately depends on question 2 above... Maybe it should be Over/Under? If so, how do I get rid of alternate lines and the put the two streams together one on top of the other?
2. 1280x768 SBS (or should it be 1280x720 SBS, I'm not sure...)
3. 800x480 SBS
The reason I am asking all these questions, is because they don't really arise with 3DTVs, only with portable media players!! All help with understanding this is much appreciated!
