Analog television encodes picture information by varying the voltages and/or frequency of the signal. All systems preceding digital television can be considered analog.

See also:

• Broadcast television system
• Terrestrial television

Common analog television systems:

• NTSC
• PAL
• SECAM

External link

• Conventional Analog Television - An Introduction (http://www.ee.washington.edu/conselec/CE/kuhn/ntsc/95x4.htm)

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