2016-03-23, 01:15
(2016-03-23, 00:42)nick w Wrote: I currently have 1 x MVC 3d file and 2 x HSBS files. I now am looking at what technology of 3d glasses to purchase. Passive or Active.
Am i right in thinking that the HSBS files wont work with active glasses?
No - you're not right.
Passive and Active are just two different techniques to split the TV's feeds to each eye. Both Passive and Active 3D TVs sold now should accept HSBS, HTAB and Frame Packed (which is what Full HD MVC should be output as on a Pi) The TV processes the various 3D signals into a common format for display.
Passive works by differently polarising alternate lines of a display and thus each eye sees alternate lines (as each eye has a different polarising filter on it that will only see one of the two sets of lines). If you have a Full HD display this means you get half-HD resolution to each eye (1920x1080 lines are split into two 1920x540 eye feeds). However both eyes see lines simultaneously, so there is no perceived flicker.
If you display a 1920x1080 HSBS image that is 960x1080 on a Passive Full HD display you will get 960x540 resolution (effectively SD) to each eye. Not great.
Active works by running the display at twice the frame (or field if interlaced) rate and by wearing powered LCD shuttered glasses with an RF or IR link to the TV. These glasses alternately blank the left eye when the TV is showing the right eye feed, and then blank the right eye when the left eye feed is displayed. This means they flicker (and it can be horrible if you have discharge lighting flickering at 50/60Hz in your room). If you are sensitive to flicker (I am) you may not find them pleasant. You also have to ensure they are charged, and if there are lots of you in the family it gets quite expensive (Passive glasses are flicker free and a LOT cheaper) However because the eye sees the entire resolution of the panel you get full HD resolution for a full HD panel.
IMHO the best of both worlds is a UHD TV with Passive 3D (like our current UHD Sony displaY). This will deliver flicker-free pictures, works with low cost glasses, but will deliver Full HD resolution (1920x1080 Full HD from MVC or 960x1080 from HSBS upscaled to 3840x1080 to each eye - as each line of the 3840x2160 display is alternately polarised for alternate eyes)