00:00In our universe, information travels in two main ways.
00:04The first is analog.
00:06Analog signals are continuous signals that vary smoothly over time.
00:09These signals can take any value within a given range creating a continuous waveform.
00:14Think of human speech, old cassette tapes, or the mercury rising in a thermometer.
00:19Then there's digital.
00:21Unlike the smooth curves of analog, digital signals are discrete, binary signals.
00:26They represent information using a series of discrete values, specifically 0 and 1.
00:32Usually 0 represents the absence of the signal or low voltage,
00:36while 1 represents the presence of the signal or high voltage.
00:39This is the language of modern computers, MP3s, and JPEGs.
00:43Let's understand the differences between analog and digital signals in a simple way.
00:48First, representation.
00:50Analog signals use continuous waveforms,
00:53while digital signals use discrete values like 0s and 1s.
00:56Next, signal nature.
00:58Analog signals can have infinite possible values within a range.
01:02Digital signals, on the other hand, use limited discrete values.
01:06Now, noise susceptibility.
01:08Analog signals are more affected by noise and interference.
01:11Digital signals are more resistant to noise and maintain better quality.
01:15When it comes to transmission, analog signals degrade over long distances.
01:19Digital signals can travel longer distances with less degradation.
01:23For storage and reproduction, analog signals may lose quality during copying or storage.
01:29Digital signals can be copied and reproduced without losing quality.
01:33Talking about scalability, analog systems are not easily scalable.
01:38Digital systems are easily scalable and more flexible.
01:41In processing complexity, analog processing is often more complex.
01:45Digital processing is usually more straightforward and efficient.
01:49Examples of analog signals include analog audio signals and analog temperature readings.
01:54Examples of digital signals include digital audio signals and digital images.
01:59In short, analog signals are continuous and more sensitive to noise,
02:03while digital signals are discrete, reliable, and widely used in modern technology.
02:09While analog is natural, digital is reliable.
02:12Digital signals are easily scalable and much simpler for computers to process.
02:17Because they only care about on or off,
02:20they can transmit data across the globe with perfect clarity.
02:23From the analog sound of your voice to the digital data on your phone,
02:27understanding these signals is the key to our connected world.
02:30For more information, visit www.fema.gov.au
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