Thursday, 16 June 2011

3D TECHNOLOGIES FOR CINEMA AND TELEVISION

This article provides a deeper insight into the current state of development of 3D TV and 3D cinema. We explain the various technologies, what they have in store for the future, and which companies are behind them.

3D Technologies for Cinema and TV Explained

At trade fairs such as the CES in Las Vegas (picture here), 3D presentations are gaining in popularity.
 
Introduction

The general feeling these days seems to be: after HD comes 3D. Three-dimensional TV, like 3D cinema, offers a new experience that differs fundamentally from all other audiovisual media.

In the world of cinema, 3D movies are already highly successful - many studios increasingly want to switch over to this production method. Unlike earlier "new waves" in the 50s or 80s, this time 3D has the chance to go further than being just another trend.

The technology is no longer plagued by the same disadvantages as before, such as poor color fidelity. Nevertheless, some problems are yet to be solved, and we're unlikely to see all movie and TV productions adopting the third dimension any time soon. There are still, for example, no binding standards for 3D, and movie-makers and broadcasters are only just beginning to develop the necessary know-how.

One thing is crucial for understanding 3D: Never confuse the playback method with the methods used to record, store, and transmit 3D images. In some instances, such as the red-green process, the same method applies to both recording and playback, but this isn't necessarily always the case. Transmission and storage will soon need standards of their own; with screens, competition is both desired and necessary for further development. The following overview will, therefore, focus on playback methods.
Displaying 3D
 
Three-dimensional vision involves many of the brain's capabilities, the most important of which is to generate a spatial perception of events from the perspectives of the two eyes. For this reason, the development of 3D-TV systems concentrates on delivering two different pictures to the viewer's eyes.
Two Possibilities:

Because this requires two channels, one for each eye, there are two possibilities for achieving this either you halve one dimension; for example, the resolution, the color depth, the time resolution, or the brightness; or you double the complexity, with two screens, two projectors, or twice the resolution.
How to address the eyes:

And then, in turn, there are two ways to address the eyes either by hiding one part of the signal using glasses, for example, or using directed beams that each only reach one of the eyes. These options result in a wide range of methods of displaying three-dimensional pictures. We'll give you an overview of the most important technologies.

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