Principles of 3D Video and Blu-ray 3D White Paper

This white paper is designed to explain how 3D video works; to help consumers make informed decisions about adopting and enjoying 3D video at home.

What is 3D?

3D is an abbreviation for “three-dimensional.” Objects in the real world can be measured in three dimensions; for example, by measuring the length, width, and height of an object. When we look at objects in the real world, we can see the

width and height of an object (the two-dimensional view of the object), but we can also perceive the depth and distance of the object.

We see the world with our two eyes. Because each eye is in a slightly different location, each sees a slightly different perspective of whatever we are looking at. We don’t normally think about these two different views, but if you close one eye at a time, you will see the image that each eye sees. Notice how much different nearby objects appear from the view of each eye.

Although each eye sees a different image, we don’t perceive two images. In a process called stereopsis, our brain combines the view from each eye into a single picture, and the combined image includes three-dimensional objects and depth perception. The word “stereopsis” is from the Greek words stereo, meaning “solid,” and opsis, meaning “sight.” Stereopsis was first described in 1838 by Charles Whetstone, but scientists and artists have been fascinated with three-dimensional perception for many centuries.

While most of the population can see 3D, a small percentage of the population (estimates range from 3 to 15%) suffers from some stereoscopic vision impairment. Depending on the quality of the 3D presentation, this population will see no 3D effect or limited 3D depth perception. There are a number of possible causes for this, from decreased vision in one eye, to the loss of the ability to point both eyes inward towards nearby objects.

Table of Contents

Introduction………………………………………………………………………………………. 2 What is 3D? ………………………………………………………………………………………. 3 Depth Perception ………………………………………………………………………………… 4

Stereoscopic Vision …………………………………………………………………………………… 11 Shooting 3D Video………………………………………………………………………………12 3D animated movies …………………………………………………………………………………. 13 Compressed 3D encoding…………………………………………………………………………. 15 Displaying 3D Video…………………………………………………………………………….17 Anaglyphic 3D …………………………………………………………………………………………. 17 3D Displays…………………………………………………………………………………………….. 17 Polarized displays + Polarized Glasses……………………………………………………………. 18 Frame Sequential (Alternate Frame) display and Active Shutter Glasses ………………….. 21 DLP 3D Television…………………………………………………………………………………….. 22 Head-Mounted Displays ……………………………………………………………………………… 24 Blu-ray 3D………………………………………………………………………………………..25 Upgrading to Blu-ray 3D…………………………………………………………………………….. 26 Blu-ray 3D TVs or Displays……………………………………………………………………….. 26 Important considerations for 3D Video ……………………………………………………..28 An audio analogy………………………………………………………………………………..33

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