Digital Television (DTV)
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Transcript of Digital Television (DTV)
Digital Television (DTV)
DTV
“Any technology that uses digital techniques to provide advanced television services such as high-definition TV (HDTV), multiple standard definition TV (SDTV), and other advanced features and services.”
--FCC, 1998
Over-The-Top Television (OTT) An increasingly popular means of accessing
television and video content that is independent of traditional over-the-air (OTA) television and multichannel video programming distributors. Hulu Netflix Internet Delivered Television (IDTV)
Mobile Phones and DTV
Explosion of Video
60 hours of video are uploaded every minute on YouTube.
Over 4 billion videos are viewed each day
Two High-Definition Cameras
Sony F65 CineAlta$65,000
Samsung HMX-W200$110
Analog to Digital
Global Movement No universal standard For consumer: drop in prices For provider: more investment
Probably the most significant change in broadcast television since the introduction of color in the 1960’s.
Conversion in the United States December 31, 2006 was the deadline for
conversion from analog to digital television broadcasting
It couldn’t be met So George W. Bush extended it until
February 17, 2009. It finally happened in June of 2009
Conversion Elsewhere
Most developed countries will convert by 2015
Japan A leader in the technology of DTV
Europe Should have been completed by 2012
HDTV
Represents the highest pictorial and aural quality that can be transmitted through the air.
SDTV Standard Definition TV Can be transmitted along with or instead of HDTV 5 SDTV channels in the space of 1 HDTV channel
“Multicasting” Often used during the day Primetime uses HDTV
Pixels
What about the “I” and the “P”? Broadcast formats are described with the
number signifying the number of scanning lines and a letter indicating where the lines are scanned in order (progressive) or with alternating odd and even lines (interlaced) 1080i 720p Theoretically, the “p” will give a smoother image
DTV Formats
Format Active Lines Pixels Aspect Picture Rate
HDTV 1080 1920 16:9 60i,30p,24p
HDTV 720 1280 16:9 60p,30p,24p
SDTV 480 704/640 16:94:3
60i,60p,30p,24p
Progress of United States Stations 1998 – 24 stations 2002 – 1315 stations 2006 – 1698 stations 2009 – Almost all of them
Push and Pull
Broadcast is a “push” technology Sends signal/feed to millions of viewers at once
IDTV is a “pull” technology Viewer decides when to access a feed
Consumers
68% of U.S. homes have DTV Prices have come down dramatically Midsized TVs sold after March 1, 2006 must
have a DTV tuner Plug-and-play standard eliminates need for
set-top box
Display Types
Direct-view CRT Plasma Display Liquid Crystal Display (LCD) Digital Light Processing Projector Liquid Crystal on Silicon
Consumer
Male 35-54 years old $100,000 a year income
Things to Ponder
Digital television will eventually replace analog transmission
DTV cost is steadily getting lower DTV picture is either perfect or not there About 33% of households have HDTV sets
as of Nov 2008 (double that of 2006) Third of this third own more than one
Manufacturers are the key
Factors Affecting Diffusion
Battle over digital spectrum Diffusion of new digital technologies
Analog versus Digital
Spectrum assigned to television can be “repacked”
Analog is one “wave” and is susceptible to interference
Diffusion Battle
Broadcasters need less spectrum But they don’t want to give it up Even for money NAB has a campaign against giving up spectrum
Government wants spectrum Auction it off for billions of dollars
mDTV
Mobile digital television Growing…..
3D TV
Passive Uses polarized
glasses Active
Uses battery glasses with liquid crystal lenses
Cost/Content are inhibiting factors
What to Expect
More advertising on OTT –TV venues Cutting the cable and tossing the dish Two-screen viewing
Watch TV with a cell phone in hand 3D – if price is right
Get rid of the glasses More convergence between television and
computers and mobile devices
Digital Television (DTV)