3D HDTV

Presented by Ashish Ben Ajay S7 E.C.E No: 7110 Marian Engineering College

Digital Television• In Digital television (DTV) transmission of the

information occurs as "data bits“ digital broadcaster can carry more information than is currently possible with analog broadcast technology.

• For example, DTV technology allows the transmission of pictures with higher resolution for dramatically better picture and sound quality

• DTV technology can also be used to provide interactive video and data services that are not possible with analog technology.

There are many quality levels of digital television programming:

1.Standard-Definition TV (SDTV) – SDTV is the basic level of quality display and resolution for both analog and digital broadcast formats. Transmission of SDTV may be in either the traditional (4:3) or widescreen (16:9) format. 2.Enhanced-Definition TV (EDTV) – EDTV is a step up from analog television. EDTV comes in 480p widescreen (16:9) or traditional (4:3) format and provides better picture quality than SDTV, but not as high as HDTV.3.High-Definition TV (HDTV) HDTV in widescreen format (16:9) provides the highest resolution and picture quality of all digital broadcast formats. Combined with digitally enhanced sound technology, HDTV sets new standards for sound and picture quality in television.

Different DTV’s

High Definition Television ( HDTV )

• A current analog TV picture is made up of horizontal lines on the picture screen; an HDTV picture can have more than twice as many lines, allowing for stunning picture detail. HDTV has an impressive 720 progressive scanning (1280x720 pixels) or 1080 interlaced (1920x1090 pixels) lines.

• HDTV uses a widescreen format. ( screen width : screen height )

• Analog television has an aspect ratio of 4:3. The aspect ratio of HDTV is 16:9, similar to a movie theater screen.

• HDTV Provides high-resolution programming. • HDTV programs can include Dolby Digital surround sound,

the same digital sound system used in many movie theaters and DVDs.

• HDTV uses the same amount of bandwidth as the current analog system, but with HDTV about six times more information is transmitted. This capability translates to much better quality in picture and sound.

Aspect Ratio

• 1.3 = 4:3 Computer monitors (VGA, XGA, etc), SDTV • 1.414… = √2:1 International paper sizes (ISO 216) • 1.5 = 3:2 35 mm film • 1.618… Golden ratio • 1.6 = 15:9 = 5:3 Widescreen computer monitors (WXGA, etc.) • 1.7 = 16:9 HDTV

Comparison

16:9 vs. 4:3, ¼ bigger

Benefit of HDTV

2 millions pixel on screen. 4.5 times more than the SDTV.

Benefit of HDTV

Benefit of HDTV

DLP – Digital Light Processor

LCD- Liquid Crystal Display

Plasma

LED & LCOS

• By In LCoS, liquid crystals are applied directly to the surface of a silicon chip coated with an aluminized layer, with some type of passivation layer, which is highly reflective.

• use an LED backlight instead of the standard Cold cathode fluorescent Lamps (LCD-CCFL) used in most LCD televisions.

• Liquid crystal on silicon (LCOS or LCoS) is a "micro-projection" or "micro-display” typically applied in projection.

• It is a reflective technology similar to DLP projectors; however, it uses liquid crystals instead of individual mirrors.• With Edge-LED lighting they can

be extremely slim. Current models on the market can be approximately one inch thick.

3D HDTV From the advent of moving pictures to the invention of TV, historic developments drove image technologies through the 20th century. Among them, colour and high definition (HD) were two major advances. Now the television industry presents a third breakthrough in the form of full-HD 3D. This new viewing experience is creating a new dimension of video realism.

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BASICS OF 3D TV

Binocular parallax

Binocular parallax defers to the ability of the eyes to see a solid object and a continuous surface behind that object even though the eyes see two different views.

Motion parallax

It means information at the retina caused by relative movement of objects as the observer moves to the side (or his head moves sideways).

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Depth perception

It allows the beholder to accurately gauge the distance to an object. It is the visual ability to perceive the world in three dimensions.

Stereographic images

It means two pictures taken with a spatial or time separation that are then arranged to be viewed simultaneously.

Holographic Images

A luminous, 3D, transparent, colored and nonmaterial image appearing out of a 2D medium, called a hologram. A holographic image cannot be viewed without the proper lighting.

• 3D HDTV uses a pair of high-definition stereoscopic images fromacquisition to display

• To apply an existing HDTV transmission system directly, a kind of

multiplexing scheme is highly required prior to the 3D HDTVTransmission

• 3D HDTV requires more bandwidth than HDTV for transmission

• 3D HDTV is much more impressive than HDTV from the viewpoint

of depth perception and sense of reality

• 3D HDTV is now released in 1080p format

Encoding

3D Scene

Capture

Signal Conversion

DisplayTransmission

Its Replica

3D HDTV

Capture - 3d images are captured by using special 3d cameras like multi cameras or single cameras..

Encoding Formats – Spatial compression , Temporal compression, Colour coding, Mpeg 4

Transmission - Through Cable service, through antenna ,Satellite Broadcast.

Display- Stereoscopic Displays Autostereoscopic Displays , Volumetric, Headmount displays

How Does 3D TV Work?

The main methods are.. 1. Anaglyph Method2. Polarization Method3. Active shutter4. Auto stereoscopy

STEREOSCOPY Process that creates 3D images and it creates the illusion of depth. In the real world, each of our eyes view objects at a slightly different angle producing two slightly different images. Our brain then then merges the two images together to form our 3D view of the world. 3D images work in a very similar way to this. Films and programmes are recorded using special cameras which record the dual images required

Anaglyph MethodThis method produces two slightly offset images each individually tinted either in Red and Cyan. The Red-Cyan glasses then filter the light and produces two individual images for both eyes. The Brain then merges both these Images and produces a 3D effect.

used in TV broadcasts and 3D Blue Ray releases

Polarization method

This method is one which is becoming the method of choice when displaying 3D images. Two images are projected at right angles to each other which are then filtered by the polarizing glasses, again meaning each individual eye only sees the image intended for it, much in the same was as the anaglyph method. Polarization is the main method that will be used by 3D TV.

Alternate-frame sequencing (Active Shutter)

It uses glasses. Left and Right images are played alternately at 48fps, and the glasses open and close the shutters over the eyes to ensure each eye sees the correct image.This requires linking the glasses to the hardware playing the images to synchronize the opening and closing of the shutters via infrared, radio frequency, DLP-Link or Bluetooth. This method is currently the main method used by Samsung, Sony and LG on their 3D Displays.

Auto Stereoscopy

This Method involves no glasses at all.The method is not practical at this time for use in the home, although many manufacturers already have screen using the technology. In particular the Philips WOW VX uses this technology but was only made available to professional markets. Hopefully the technology will become available for the home at some point in the future!

Delivering 3D to the Home

3D HomeMaster

3D Encoding &Video Compression

3D Video DistributionChannels

Media Players,Receivers,

& Set Top Boxes

VideoDecompress

3D FormatDecode

3D TV

Left Eye

Right Eye

VideoCompress

3D FormatEncode

3D HomePackage orBroadcast

3D Encoding Formats

SPATIAL COMPRESSION

Side-by-Side

Checkerboard

Line Interleave

Column Interleave Provides legacy channel compatibility but reduced

picture resolution!

Top & BottomLeft Eye

Right Eye

Left Eye

Right Eye

TEMPORAL COMPRESSION

2D

Time

3D Frame Sequential

Providesfull resolution quality

but requiresincreased channel

bandwidth and storage!

RE

LE

RE

LE

RE

LE

RE

LE

RE

LE

Left Eye

Right Eye

Left Eye

Right Eye

3D Encoding Formats

MD

2D

2D

MD

2D + METADATA

2D

Time

MD

2D

2D

MD

2D

MD

2D

MD

Can provide2D playbackcompatibility

in legacy devices!

Left Eye

Right Eye

Left Eye

Right Eye

Metadata2D

2D + Metadata

3D Encoding Formats

COLOR CODING

3D Anaglyph

Time

Provides channel compatibility

but with a less than compelling3D experience!

Left Eye

Right Eye

Left Eye Right Eye

Left Eye

Right Eye

3D Encoding Formats

This technology displaysthe left and right views required for stereoscopic, or 3-D imaging. When combined with shutter glasses, users will experience high quality, high definition 3-D viewing with DLP HDTVs. A synchronization signal is generated for each view and transmitted optically to shutter glasses that are worn by the viewer. The shutter glasses process the signal and control the shutter for each eye, insuring display of the correct view.

DLP 3-D HDTV Technology

Left view Right view

3-D HDTV Input Format

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 right views providing the viewer with the highest quality image possible.

Left input image sampled

Right input image sampled

Combination of Left and Right sampled images into full 1080p image for display.

Left input image

Right input image

DLP 3-D HDTV System Requirements:

• A DLP 3-D Ready HDTV offered by either Mitsubishi or Samsung • VESA compatible LCD shutter glasses and sync signal transmitter • Video or graphics source which shows 3-D pictures using DLP HDTV 3-D format.

Advantages of DLP 3-D HDTV technology

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

• The technology has a virtually zero implementation cost on new DLP HDTV, benefiting consumers with a future proof capability.

• Older 3-D technologies used anaglyphic (red/blue) glasses. A DLP 3-D HDTV system with shutter glasses gives exceptional color fidelity and superior picture depth.

Advantages & Disadvantages

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APPLICATION OF 3D TV IMAX screen OMNIMAX screen Scientific Simulation and Visualization Entertainment and Gaming Military and Communication field

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