What is the stereo video?

Stereo video or stereoscopic video is the practice of making an illusion of 3D image in a moving form. To achieve this effect, there are a number of methods, usually classified by whether the viewer needs to wear glasses, and again, whether these glasses play an active role in effect. The phrase stereo video can also refer to the VHS device that records and plays two sound channels, rather than one.

The basic concept of stereo video is the same as 3D display. The viewer is displayed a picture that combines two pictures, one looked at each eye. These pictures show the same scene, but from slightly different perspectives. Brain attempts to align this difference create the illusion of depth. The concept of stereo video is simply to re -create this effect for each movie.

There are three main types of stereo videos, the first two of which include the spectator on each other. The best known in the 20th century were passive glasses, which means they are quite static. One examples are polarized glasses that use poisonNu red lens and one green lens. Both images are displayed on the screen simultaneously, with the lens for each eye filtering of the "wrong" image.

In the 21st century, active glasses became more popular. One examples are glasses of liquid crystal shutter. They contain a layer of liquid crystal in each lens that can quickly switch between transparent and blocking light. The lenses are switched here and there when synchronizing with a video that shows images from alternating perspectives.

The final type of stere video is autostereoscopy or 3D without glasses. Most variants include a screen that has small combs rather than it is completely flat. This means that each eye can only see a part of the screen, which means that different images can be displayed simultaneously for both eyes. The main disadvantage is that Hjak has shown that this effect is difficult to work well on large screens or in theYet with multiple spectators sitting in different places.

In the 80s and 90s. In this context, stereo referred to the sound rather than a video. During the flourishing of the VHS, stereo equipment has become more popular than one -off recorders only for Mono. In later years, films were published in Dolby for Logic, which used two audio channels to coded the multi -channel effect of the spatial sound that could be played back on compatible sound systems.