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.