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Analog v.s. Digital
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Because digital signals consist of binary code, they can travel through digital lines much more quickly. This allows more data to be transferred, which results in a sharper, clearer signal. Digital signals also don't have the distortion and "hiss" of analog signals. In terms of phone signals, the 1s and 0s make it much harder for eavesdroppers to listen in, and it increases the range of cordless phones and cell phones.
Analog v.s. Digital
Why digital is more reliable for encoding and transmitting information.
By: Anna Crites
Advantages of Analog
Digital Encoding & Transmitting
Transmitting
Encoding
What's the difference?
The main advantage of an analog signal is that it's cheaper than a digital signal. If you have an older TV, phone or stereo system, it won't be able to translate the clarity of digital the same way. Analog also reproduces the subtleties and variances of sounds more readily, since its signal can vary in tone.
Analog
Digital
To optimize transmission, the signal must be encoded to facilitate its transmission on the physical medium. There are various encoding systems for this purpose which can be divided into two categories:
•Two-level encoding: the signal can only take on a strictly negative or strictly positive value (-X or +X, where X represents a value of the physical quantity being used to transport the signal)
•Three-level encoding: the signal can take on a strictly negative, null or strictly positive value (-X, 0 or +X)
*Less sound interference
*Better for processing and combining
*More resistant to additive noise
*Simpler to measure and evaluate
An analog signal is a constant electrical signal that is sent through wires into a speak or television monitor. It has proven to be an extremely reliable technology, effective for decades and applicable not just to televisions and sound systems but also to telephone lines.
Unlike analog signals, digital signals are not constant. Instead, they constitute a series of pulses, each the exact same amplitude and lasting the same length of time. The pulses create a binary code of 1s and 0s, similar to the way computers store data. They don't rise and fall the way analog signals do, and the pulses are cleaner.
So, why is Digital better?
My Resources
Although there are pros and cons for both analog and digital, as far as encoding and transmitting information goes, digital is best. It provides faster service and far superior clarity. Although analog may have better sound quality, digital is sharper and clearer.
Advantages of Digital
This website is the one that I used for most of my information.
http://www.ehow.com/about_4761121_difference-analog-vs-digital.html
I also used some of Mrs. Smith's websites.