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Welcome to IPTV Magazine!

Our mission is to identify and explain the technologies and applications that allow television services to be provided through Internet Protocol (IP) data networks.  Readers learn the options and the system to implement IPTV along with new features and applications and business opportunities that are available in the IPTV industry today.







3 Dimensional Displays


A three dimensional display is a device that converts (renders) media or data into a format that produces a perception of three dimensions. By filming media with two camera's that are only a few inches apart and then projecting the media in a manner where the viewer will watch each camera's output with only one eye, the illusion by a person is that they can perceive height, width and depth of images. Since depth perception is provided by providing different images to each eye, various techniques are used, such as colored glasses, polarized glasses and other methods that filter the media to provide different image for each eye.

The term "Stereoscopy" is the generic term that describes the apparatus that allows the viewer to enjoy the 3-D three-dimensional experience.

Historically, 3-D is a revenue enhancement and reappears every 30 years. Since its invention in 1838, stereoscopy has been used as a technique to create the illusion of three dimension movies and images. The boom in 3-D movies didn't come until 1950 when movie producers became threatened by the new technology of television with television gaining enormous popularity. The movies were losing box office sales. However, theatres were equipped with the equipment and the movie industry enjoyed a golden era of revenue and popularity.

3-D may be the tool to stopping movie piracy.

All future DreamWorks animate productions will be in 3-D.

The 3-D technology basics remain the same. Bringing it to the PC is the next step.

Filming the media in separate cameras in the same orientation as our own eyes makes 3-D as simple concept that fools the mind into seeing the media in 3-D. How do you bring this experience to televisions or the PC? Stereoscopy methods are possible, but are more difficult with PC screens. "Autostereoscope" is a method that allows 3-D images to be experienced without the use of colored glasses or other accessories.

For normal 2D video displays, each eye views the same image. For autosteroscopic displays, lens technology provides different images to each eye thus providing the "auto" stereoscope. Philips has created Autostereoscopic 3D displays that use multiview lenticular technology, 2D plus depth media format and dual mode capability.

Multiview Lenticular Display

A multiview lenticular display is a device that provides multiple viewpoints using an optical lens that provides several different viewing angles to a single display. When a viewer is located at a viewpoint where they can view different images in each eye, they can perceive image depth. Using multiview lenticular displays allows for the use of multiple viewing points, which is an optical solution. The display screen essentially wears "glasses" that direct two images towards the user. Just like wearing glasses, the "focal point" is set to hit the eye and provide the eye with a sharp image. Similarly, if you move your orientation from the lenses, you lose the image. The lenticular display projects two images that are intended to be viewed by each eye separately in order to create the 3-D image. This implies that you must sit at the same spot front of the 3D display to view media. However, a solution to this challenge is to design a display that has multiple focal points.

To create a display with multiple viewpoints, a display that has a set of lenses on top of the LCD screen is used. Each of the cylindrical lenticules focus pixel images below it to a particular focal point. By installing a display with multiple lenticular lenses, as the viewer moves to different viewing points, they can see different pixels below the lenticules.

Figure 1 shows how a multiview lenticular display can provide depth perception and allow multiple viewers to have different perspectives. This example shows that the display provides several viewpoints that display different left and right images. Each of the viewpoints sees different pixels located behind the lenticular lens. As the viewer moves to different points, they can see different display pairs. This allows the viewer to have a different image with depth perception at multiple locations in front of the display without the need for eyewear accessories.


Still a Technology in it's Infancy

3-D displays are in their infancy but the potential benefits of enabling three-dimensional images on an essentially flat screen potentially can provide some valuable services. Imagine, Air Traffic Control Screens

Figure 1., Mutliview Lenticular Display

in 3-D; Medical images that provide better information than X-Ray's at a cost far less than MRI's and of course, gaming, sports viewing, and enhanced messaging.

2D Plus Depth Video Format

Two dimension plus depth video format is a three dimensional imaging system that uses a combination of 2D video plus depth information to create a 3D image. The 2D plus depth format combines pixel color

information along with its depth from the viewer. The use of a 2D plus depth video format allows for the use of the same content format on standard displays. The added depth information instructs the display device how to process the video signal to add 3 dimensional attributes.

Figure 2 shows how 2D plus video format can be enhanced with depth information. The standard video media is provided in standard video format along with added depth information.

Figure 2, 2D Plus Depth Format

Figure 3, Dual Mode 2D and 3D Display

Dual Mode 2D and 3D Display

A dual mode 2D and 3D display has the capability of providing images in either 2D or 3D display modes. Because 3D display mode uses some of the image resolution for depth perception, dual mode displays may be switched to 2D mode for applications that require more detail such as displaying text or web pages.

Changing display modes can be performed by software (soft lens) or hardware. For software mode switching, the underlying pixels are changed to provide the same image to the left and right eyes. For hardware mode switching, the optical characteristic of the lenses are changed using liquid crystal shutters or some other controllable optical lens switch.

Figure 3 shows how dual mode depth display can be used to provide both 2D and 3D images. This example shows that the 3D format divides the pixels up into several different viewpoints. When the display is in 3D mode, some of the pixels are focused to particular viewing areas. When the 2D mode is used, viewers at all angles can see the same pixels.

Where is the Revenue?

While some industries such as the medical profession and architects may have a need for 3D displays, consumers have been slow to adopt 3D eyewear. With profit margin's on computers at 4% for the most

profitable manufactures is there incentive to add 3-D?

3-D technology is seeing another boom, lead by new technology and commitments by industry enthusiast such as Jeffery Katzenberg, head of DreamWorks Animation who will make all future animated films in 3-D. There is a revenue motive as well. Katzenberg says, "25% of our revenue is lost to piracy around the world today," he said. "90% of that is due to someone taking a camera into a movie theatre.

"You can't camcorder 3D - YET"

For more information about Philips 3D displays, you can contact:
Philips 3D Solutions
High Tech Campus 27
5656 AE Eindhoven
The Netherlands
Email: 3DSolutions@Philips.com
Web: www.Philips.com/3D Solutions

Ben Levi tan
919 605 3003




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