Traditional cable is analog, which requires more bandwidth per channel. Usually you need a cable box to receive Digital cable which shall also include High Definition (720p) channels if you subscribe to them. You can also receive local HD channels with an antenna, but you'll need a new television that can receive digital channels or a digital converter box.
One problem is peoples ability to decipher the difference between whats real and what isn't. Can cause views and beliefes to run wild (not unlike regular cinematography but with digital images to enchance such things as gore it can cause moral issues)
Analog signals are continuous while digital signals are discrete
http://www.wirelessadvisor.com/analog-digital-whats-the-difference Theis Web site explains the main features of both.
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The main difference between hybrid and non-hybrid vehicles is that hybrid vehicles use a bank of batteries along with an electric motor to power the car.
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