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Digital signal - Wikipedia, the free encyclopedia
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Analog signal - Wikipedia, the free encyclopedia
An Analog or analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e analogous to another ...
en.wikipedia.org/wiki/Analog_signal |
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The advantage of digital signals is that they are much less likely to be degraded by interference (noise). It's also possible to send a lot more information digitally (e.g. more television channels) than using analogue technology. ... Messages from Space home | Schoolzone home | Telecomms home | Analogue vs digital signals...
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Sound waves are a continuous wave and as such are Analogue in the real world. Most computers used such as the PC work using digital signals. Therefore if you need sound or music to be processed by a computer it needs to be converted.
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Digital signals require greater bandwidth capacity than analogue signals, thus are more expensive to communicate. The following diagram shows a digital signal ... Digital signals sent via the PSTN need to be converted to analogue first (by using a device called a modem). Digital signals can be sent via the ISDN unmodified.
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