understanding the change the digital television revolution created and presented by tracy crouthamel
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UNDERSTANDING THE CHANGE
The Digital Television Revolution
CREATED AND PRESENTED BY TRACY CROUTHAMEL
The Basics of Transmitting a TV Signal
Transmission steps
Video camera
Rasterizes
Horizontal / Vertical sync
The Beauty of a Digital Picture
Resolution
Pixels
Refresh rate
525
Digital vs. analog
Interlaced vs. progressive scanning
INTERLACED
PROGRESSIVE
Analog Vs. Digital Picture
ANALOG DIGITAL
The Beauty of a Digital Picture
Our vision
Analog and digital ratios
4:3
16:9
Analog Vs. Digital Sound
RecordsCassette2 channel stereo
CDsMP35.1 Surround
Sound
ANALOG DIGITAL
Freedom!
Compressed information
Multicasting
Public safety
Interactive TV
Free TV
No more static
All or nothing
Summation
ResolutionPixelsProgressive scanning16:9 ratioMulticastingNo more staticInteractive TV
Analog TV stinks
The More You Know
How Television Works
http://www.youtube.com/watch?v=uBm9ZyIg3I0
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
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.
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