3D FAQs

Posted by admin | | Monday 12 July 2010 13:38

Frequently Asked Questions

What is 3D TV?

3D TV is a  term, known as steoscopic, for viewers to experience TV programs, movies, images, and games,as well as other video content in a stereoscopic effect. It adds a sensation of a third dimension, a depth, to ordinary two-dimentional  TV and HDTV s, which is typically limited to only height and width (known as “2D” view).

How can you get 3D from a 2D screen?

A 3D display produces (with the help of 3D hardware and software) two separate images of the same image simultaneously, one intended for the viewer’s right eye and one for the left eye. The two full-size images occupy the entire screen and appear intermixed with one another, whereby the objects in one image are often repeated or skewed slightly to the left (or right) of corresponding objects in the other when viewed without the aid of special 3D glasses. When viewers ware the 3d glasses, both images being combined in the brain’s visual vortex, allow them to perceive those two images as a single 3D, or steroscopic, image.

What is the native 3D format of the Samsung and Mitsubishi “3D Ready” DLP HDTVs?

  • The 3D-DLP displays accept 3D information in a special checkerboard pattern format at the native resolution of the display.
  • More information is available in these two white papers from Texas Instruments: DLP® 3-D HDTV Technology, and Introducing DLP® 3-D TV.

What kind of 3D content can I view on these 3D displays?

  • Stereoscopic Games – over 1000 consumer PC games can be played in stereoscopic 3D using drivers from either NVIDIA, DDD or iZ3D.
  • Stereoscopic 3D DVDs – a large selection of field-sequential 3D DVDs is listed here: Illustrated 3D Movie List and 3D DVD list. See below for how to view them in 3D on these 3D HDTVs.
  • Stereoscopic 3D photographs shot with a stereoscopic 3D camera. See the SDM 3D Camera List for more information.

Note: There has been some talk of conversion of regular 2D content to 3D in real-time, however in my experience this rarely produces images as visually pleasing as real stereoscopic 3D content.

Can I watch field-sequential 3D DVDs or Sensio 3D DVDs on these 3D Displays?

  • Yes, but not using a regular DVD player. You’ll need a device to convert from the field-sequential 3D format (as used on many 3D DVDs) to the display’s native 3D format.
  • At the present time the easiest way to do this is using a PC and 3D compatible software (e.g. Stereoscopic Player, DepthQ player, or DDD Tridef Media Player).

What is the “3D Sync” connector on some of these 3D-HDTVs?

  • The “3D Sync” connector is an industry standard 3-pin mini-DIN connector which provides a TTL toggle signal (high = one eye, low = other eye), power and ground.
  • The connector and signals are summarised here: www.stereoscopic.org/standard/connect.html

How do I enable 3D mode on the Samsung “3D-Ready” DLP and “3D-Ready” Plasma HDTVs?

  • Plug a device which creates checkerboard pattern (at the native resolution of the display) into the “HDMI 3” input on the 3D-HDTV (this may be a different numbered socket on some displays – check the manual). For the moment, this device will likely be a PC with a DVI video card, a DVI to HDMI cable, and appropriate 3D software.
  • Plug a pair of LCS 3D glasses which support the VESA 3-pin mini-DIN connector into the “3D-Sync” connector on the 3D-HDTV. One example of such a pair of glasses is this one: Wireless 3D Gaming Glasses
  • Switch the display to “HDMI 3” (by pressing the source button) (this may be a different numbered socket on some displays – check the manual), and then press the “3D” button on the remote.

The most comprehensive FAQ has been published by David Katzmaier. Below is a small portion of his article:

(Latest update: March 16, 2010)The recent flood of news about new 3D TVs, itself spurred by the hype surrounding the 3D release of “Avatar,” has raised a few questions. This article, arranged in the tried-but-true manner of “Frequently Asked Questions,” attempts to answer them.

When this FAQ was first published in January 2010 we polled the six major TV makers that announced new 3D models–LG, Panasonic, Samsung, Sony, Toshiba, and Vizio–to help with some answers. We also gleaned information from enthusiast sites like AVS forum and EngadgetHD. In the last couple of months more details have been announced, and we’ve had more in-depth conversations on the subject. You’ll find many updates incorporated into the answers below, which represent our best current information on the subject.

This article is targeted toward people looking for an introduction to modern 3D TV technology. If you’re an advanced reader just looking for the latest news your best bet is going straight to CNET’s 3D TV resource guide. And if you have anything to add to this article, feel free to leave a comment or at least vote in the poll.

Read full artilcle here…

Q: What is Half SBS and Full SBS?

A: This is 1920x1080i SbS. When you see them on your 3DTV, they will be 960x1080i each.

Q: What is sequential-to-sequential 3D conversion:?

A: 

Q: How is it done?

A:

 

Q: What is the graphic representation of the over/under format?

A: See the following image:

 

SbS is one of the frame compatible 3D formats which uses a 1920×1080 frame to house 2 seperate frames. Another is Top/Bottom (aka Over/Under) which ESPN is using in the 1280×720 format. This results in 2 images each 1280×360:

 

More FAQ can be found here.

Q: Full Side-by-Side format, what is it?

Most 3D capable TV’s have the ability to play back video clips or even feature length movies from memory stick or even streaming from your home network though your PC or laptop.  There are various formats supported and you will most likely need to tell the TV which format you are watching for example SideBySide or Over/Under.

The format that seems to be most universally supported by 3DTV’s is commonly called 1080p Side By Side Squashed, this is basically two video streams (left and right) running side by side in the same video file, which is squashed to fit into a single 1080p video with the right image first, if your video looks weird it means you probably have your left and right the wrong way around or that your TV support sleft image first, there may be options in your TV to correct this, Samsung call it Image Correction, obviously getting this right before you backup would be preferable.

  • As you can see both videos have 1080 vertical pixels, but the side by side video has half the horizontal pixels.  Full quality 3D side by side 1080p video is 2 x 1920×1080 videos streams (3840×1080) but unfortunately this is not supported by any 3DTV I’m aware of, most likely due to limitations of the TV’s playback hardware.
  • When backing up your Blu-ray movie the files are often decoded or demuxed into two separate video files, a left and a right video stream, but they are not side by side in the one video like your 3DTV probably supports so you may need to convert this into the side by side format, this is called remuxing.
  • A guide how to backup your 3D Blu-ray into a file you can play back on your TV will be coming shortly,  although there is a reduction of quality you would be hard pressed to see the difference.

Here are a few benefits of backing up your data in this way…

  • Less ware and tare on your EXPENSIVE 3D Blu-ray disc’s.
  • Convenience of having all your Blu-rays accessible from your remote.
  • No need to get up and change discs.
  • If you lend it to a friend and they loose it, you don’t need to fork out more cash.
  • Your covers wont get damaged.
  • You can look at your Blu-ray while your watching the movie… I don’t know why you’d want to do that…

For a guide on how to create content compatible with 3DTV’s go >>> HERE <<<

What is INTERLACE?

Interlace:

  • To illuminate a screen by displaying all odd lines in the frame first and then all even lines.
  • Interlacing uses half frames per second (fields per second) rather than full frames per second.

The interlace method was developed for TV broadcasting because the allotted bandwidth for TV channels, defined more than a half century ago, was not sufficient to transmit 60 full frames per second. Interlacing with 60 half frames was visually better for moving images than 30 non-interlaced full frames.

Interlace Vs. Progressive Scan
Interlaced screens display every other line (1-3-5 etc., then 2-4-6, etc.), while non-interlaced screens, known as “progressive scan,” display lines consecutively (1-2-3 etc.).

All non-digital TVs are interlaced. Older CRT computer monitors were also interlaced at their highest resolution and progressive scan at lower resolutions. Some digital TV standards are interlaced, such as the high-definition 1080i format, and HDTV sets support both interlaced and progressive scan signals (see HDTV).

Q: What is DLP  projection system technology?

A: Read more here: DLP Technology by free downloading a file.

The DLP®3-D HDTV technology supplies a 60Hz frame rate signalto each eye (equivalent to 120 Hz). This high video frame rate reduces flicker which is typical of other frame sequential stereographic display systems.

Q: What is DLP 3D video format?

A: 3-D stereoscopic video content is sent to the TV digitally, through an HDMI or DVI port.  Left and right stereo images are independently filtered, then sampled in an offset grid pattern.  The resulting views are then combined, and appear as a left and right checkerboard pattern in a conventional orthogonal sampled image. This format preserves the horizontal and vertical resolution of the left and rightviews providing the viewer with the highest quality image possible with the available bandwidth.

Q: How does it look?

A: 

Q: What is 3D polarization principle?

A: You can see the process of 3D polarization technique from the following images below:

 

 

 

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