Originally Posted by Bluemustang
Hey I've looked around but havnt found an answer to this particular question. As far as the actual 3d content/programming goes is there a difference between active and passive? I've seen 3d movies that have a red like shift in the image, kind of like ghosting the first image. Then ive seen 3d that is 2 side by side images. Is this the difference in content between passive and active?
If so which is which and which has larger file sizes, and which one has better availability on blu ray discs and how do you tell the difference when buying?
Red-blue shifted images are the old anaglyph 3D technology and need matching glasses with red and blue (or cyan) filters. The video file size is the same as 2D and a 2D display is used. The colour when watching in 3D is very poor. This format is not normally used with modern movies. It is possible
you could find an old anaglyph movie on a Blu-ray, but the Blu-ray packaging should contain a special warning if anaglyph is used.
Squashed side-by-side uses the same file size as 2D. It is the usual format for television broadcasting of 3D. You can find some files on the net in this format. To play them in 3D you may need to set the player manually to side-by-side 3D mode.
Blu-rays usually use frame-packed 24p for 3D which is Full HD for Left and Full HD for right and needs about 1.5 times the file size of a 2D Blu-ray version of similar bitrate quality. The Blu-ray player sends the 3D output using an HDMI cable to the 3D display which can be either of active or passive design. There is no such thing as a different Blu-ray disc or Blu-ray player format for active glasses displays compared with passive glasses displays. It is all done in the display.
Modern passive glasses have a fixed but different polarisation filter for each lens. Modern shutter glasses operate at around 120Hz and alternately shutter the Left and Right lenses, keeping in synch with the active 3D display or projector.
There were a few questions there, Bluemustang!
[There is also a special Dolby 3D system for publ
ic cinemas, a type of advanced anaglyph, using light with spectral offsets. This method is not used for domestic displays.]Edited by MLXXX - 3/23/13 at 5:58am