3d hdtv presentation

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3D HDTV


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Contentsy Introductiontodigital TV

y Differenttypesofdigital TV

y Highdefinition TV ( HDTV)

y Basicsof3D

y Whatis 3DTV?

y

Stereoscopyandits methodsy 3D HD Technology

y 3D Ready TV

y Delivering 3D tohome

y Applications

y Advantages & disadvantages

y Currentscenario

y Futureof3DTV

y Keyplayers

y

References


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Digitaltelevisiony In Digitaltelevision (DTV) transmissionoftheinformation

occursas "data bitsdigital broadcastercancarry moreinformationthaniscurrentlypossible withanalog broadcast

technology.

y Forexample, DTV technologyallowsthetransmissionofpictures withhigherresolutionfordramatically betterpictureandsound quality

y DTV technologycanalso beusedtoprovideinteractivevideoanddataservicesthatarenotpossible withanalogtechnology.


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TypesofDTVThereare many qualitylevelsofdigitaltelevisionprogramming:

1. Standard-Definition TV (SDTV)

SDTV is the basic level ofquality display and resolution forboth analog anddigital broadcast formats. Transmission of SDTV may be in either thetraditional (4:3) orwidescreen (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 andpicture quality of all digital broadcast formats. Combined with digitallyenhanced sound technology, HDTV sets new standards for sound andpicture quality in television.


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High Definition Television 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 picturedetail. HDTV has an impressive 720 progressive scanning (1280x720 pixels) or 1080interlaced (1920x1080 pixels) lines.

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

Analog television has an aspect ratio of 4:3. The aspect ratio ofHDTV is 16:9, similarto a movie theater screen.

HDTV Provides high-resolution programming.

HDTV programs can include Dolby Digital surround sound, the same digital soundsystem used in many movie theaters and DVDs.

HDTV uses the same amount of bandwidth as the current analog system, but withHDTV about six times more information is transmitted. This capability translates tomuch betterquality in picture and sound.


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Comparison


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y Binocular parallax

It defers to the ability of the eyes to see a solid object and acontinuous surface behind that object even though theeyes see two different views.

y Motion parallax

It means information at the retina caused by relativemovement of objects as the observermoves to the side (orhis head moves sideways).

Basicsof3D


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y Depth perception

It allows the beholder to accurately gauge the distanceto an object. It is the visual ability to perceive the world inthree dimensions.

y tereographic images

It means two pictures taken with a spatial or timeseparation that are then arranged to be viewedsimultaneously.

y Holographic Images

A luminous, 3D, transparent, colored and nonmaterialimage appearing out of a 2D medium, called a hologram.

A holographic image cannot be viewed without theproper lighting.


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Whatis 3DTV ?y A 3D television (3D-TV) is a television set that employs techniques

of3D presentation, such as stereoscopic capture, multi-view capture,or 2D plus depth, and a 3D display.

y Common 3D display technology for projecting stereoscopic imagepairs to the viewer include:

1. With lenses:

y Anaglyphic 3D (with passive red-cyan lenses)

y Polarization 3D (with passive polarized lenses)

y Alternate-frame sequencing (with active shutter lenses)

2. Without lenses: Auto stereoscopic displays, sometimes referred tocommercially as Auto 3D.


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Stereoscopy

Processthatcreates 3D imagesanditcreatestheillusionofdepth.

Inthereal world,eachofoureyes

view objectsataslightlydifferentangle producing two slightlydifferent images.

Ourbrainthenthen mergesthetwoimagestogethertoform our3D

view ofthe world.

Films and programmes arerecorded usingspecialcameraswhichrecordthedualimagesrequired


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Anaglyph Method

This methodproduces twoslightlyoffsetimageseachindividually tintedeitherin RedandCyan.

The Red-Cyanglassesthenfilterthelightandproducestwoindividualimagesforbotheyes.

The Brainthen merges boththeseImagesandproducesa 3D effect.

Usedin TV broadcastsand 3D BlueRayreleases.


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Polarization method

Twoimagesareprojectedatrightanglestoeachotherwhicharethenfiltered bythepolarizingglasses,again meaningeachindividualeyeonlyseestheimageintendedforit, muchinthesamewasastheanaglyph method.

Polarizationisthe main methodthat will beused by 3D TV.


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Alternate-frame sequencing (Active Shutter)

y Leftand Rightimagesareplayedalternatelyat120fps,andtheglassesopenandclosetheshutters

overtheeyestoensureeacheyeseesthecorrectimage.

y Thisrequireslinkingtheglassestothehardwareplayingtheimagestosynchronizetheopeningandclosingoftheshuttersviainfrared,radio

frequency, DLP-LinkorBluetooth.

y This methodiscurrentlythe mainmethodused by Samsung, SonyandLGontheir3D Displays.


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Auto Stereoscopy

This Methodinvolvesno glasses atall.

Itincludestwo broadclassesofdisplays:

1) usehead-tracking(usingacamera) toensurethateach of theviewer'stwoeyesseesadifferentimageonthescreen

2) use multipleviewssothatthedisplaydoesnotneed

to know wheretheviewers'eyesare.

Examplesofautostereoscopic displaysincludeparallaxbarrier,lenticular,volumetric,electro-holographic,andlightfielddisplays.


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3D HD Technology

3D HDTV usesapairofhigh-definitionstereoscopicimagesfrom

acquisitiontodisplay

Toapplyanexisting HDTV transmissionsystem directly,akindofmultiplexingschemeishighlyrequiredpriortothe 3D HDTV

Transmission

3D HDTV requires more bandwidththan HDTV fortransmission

3D HDTV is much moreimpressivethan HDTV from theviewpoint

ofdepthperceptionandsenseofreality

3D HDTV is now releasedin1080pformat


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3D Ready TV canoperatein 3D mode (inadditiontoregular2D mode)

worksinconjunction withaset-top-boxandLCD shutterglasses

supports HDMI1.4

minimum (inputandoutput) refreshrateof120 Hz


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Encoding

3D Scene

Capture

Signal

Conversion DisplayTransmission

Its Replica

Componentsof3D TV System


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Stagesy Capture - 3D imagesarecaptured byusingspecial 3D

cameraslike multicamerasorsinglecameras.

y Encoding Formats Spatialcompression, Temporalcompression,Colour coding, Mpeg 4

y Transmission - ThroughCableservice,through

antenna,Satellite Broadcast.

y Display- Stereoscopic Displays AutostereoscopicDisplays , Volumetric, Headmountdisplays


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Delivering 3D to the Home

Capturingsystem

3D Encoding &

Video Compression

3D Video Distribution

Channels

Media Players,Receivers,

& Set Top Boxes

VideoDecompress

3D FormatDecode

3D TV

Left Eye

Right Eye

VideoCompress

3D FormatEncode

3D HomePackage orBroadcast


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Applications

EntertainmentandGaming Scientific Simulationand Visualization

MilitaryandCommunicationfield

Surgeryandothermedicalapplications

Industrialapplications


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Advantagesof3DTVRicher,lifelike,moreengagingandentertaining

experiencethan2DTV.

3DTV isincreasingly becomingaffordable.3D offersgreaterimmersionanddepthtoviewing.

Backwardcompatible.

Futuretechnologies wouldnotrequireglassesfor3D

viewing.


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Disadvantagesy Thereisnodefinedindustrystandardfor3D hardware,

softwareand TV components.

y Highcostofproductionandtransportationof3D videoinformation

y

Better3D experiencerequiresglassesto worn whileviewing.


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Current Scenario

y Some 3D televisions actuallygeneratetheirown 3Dcontentfrom standard,lifeless2D video.

y Atpresent,no mass markettechnologyfor3D inthehomethatletsasingle TV displays both2D and 3Dcontentsimultaneously withoutglasses.

y However, 3D TV withoutglassesdoesexist butthesearestillprototypes. Keyplayerslike Sony, Samsung aredevelopingsuchtechnologiesespeciallyforhomeviewingexperience.


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Contd.

y ESPN haslaunchedastationdedicatedto broadcastinglivesportingeventsintruestereoscopic 3D. ThisyearFIFA worldcuphad 3D broadcasting.

y Sony, DiscoveryandIMAXhavealsoteameduptolaunchtheirownnature-theme24-hour3D channel by2011.


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Futureof3DTV

y No 3D glassesforhomeviewing

y 3D content will bereadilyavailable.

y Hence better3D experience.

yThesystem mayincludeinteractivefeaturesas well

y Ourclassrooms maysomeday beequipped with 3DTV

y Thepossibilitiesareendless.

y Accordingtoa marketresearchfirm, DisplaySearch,the

3D display marketisexpectedtogrow from $902 millionin2010 to $22 billionin2018. Specifically,the 3D TVmarketisexpectedtoexpandtoa $17-billion market,withsalesincreasingfrom 200,000 unitsin2010 to64millionunits2018.


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Key Players in 3DTV


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References

y http://www.3dtv-research.org/course

y www.grassvalley.com

y http://htsa.com/mydocuments/3d_tv.pdfy en.wikipedia.org/wiki/3D_television

y ieeexplore.ieee.org/iel5.pdf

y ieeexplore.ieee.org/xpls/absall.jsp


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APPLICATIONS OF 3D TV IMAXscreen

OMNIMAXscreen

Scientific SimulationandVisualization

EntertainmentandGaming

MilitaryandCommunicationfield


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