understanding the change the digital television revolution created and presented by tracy crouthamel
TRANSCRIPT
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UNDERSTANDING THE CHANGE
The Digital Television Revolution
CREATED AND PRESENTED BY TRACY CROUTHAMEL
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The Basics of Transmitting a TV Signal
Transmission steps
Video camera
Rasterizes
Horizontal / Vertical sync
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The Beauty of a Digital Picture
Resolution
Pixels
Refresh rate
525
Digital vs. analog
Interlaced vs. progressive scanning
INTERLACED
PROGRESSIVE
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Analog Vs. Digital Picture
ANALOG DIGITAL
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The Beauty of a Digital Picture
Our vision
Analog and digital ratios
4:3
16:9
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Analog Vs. Digital Sound
RecordsCassette2 channel stereo
CDsMP35.1 Surround
Sound
ANALOG DIGITAL
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Freedom!
Compressed information
Multicasting
Public safety
Interactive TV
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Free TV
No more static
All or nothing
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Summation
ResolutionPixelsProgressive scanning16:9 ratioMulticastingNo more staticInteractive TV
Analog TV stinks
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The More You Know
How Television Works
http://www.youtube.com/watch?v=uBm9ZyIg3I0
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Sources
http://electronics.howstuffworks.com/dtv.htm
http://www.pbs.org/opb/crashcoursehttp://akamaipix.crutchfield.com/ca/learnin
gcenter/home/gaming/aspect_ratio_compare.jpg
http://www.fcc.gov/cgb/consumerfacts/digitaltv.html
http://en.wikipedia.org/wiki/Digital_television_transition
http://www.dtv.gov/consumercorner.htmlhttp://www.life123.com/technology/home-
electronics/hdtv/how-does-digital-tv-work.shtml
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Sources
http://www.dtvanswers.com/dtv_how.htmlhttp://www.dtvtransition.org/index.php?
option=com_content&task=view&id=14&Itemid=27
http://www.answerbag.com/articles/How-Does-Digital-TV-Work/5f6a1438-9691-b282-1c7a-3a5b95313199
Straubhaar, Joseph and Robert LaRose. Media Now: Understanding Media, Culture, and Technology. Belmont, CA: Wadsworth, 2009.