There
are two types of signals that can carry information - analog and digital
signals. They have been widely applied in people’s daily life. However, there
are still some differences between them. First of all, the primary difference
between analog and digital signals is that analog signals are continuous
electrical signals which play recorded materials in their original form,
whereas digital signals are non-continuous electrical signals generated by digital modulation which play materials in their re-sample
forms. At the same time, this leads to the quality difference in analog and
digital signals. Nonetheless, analog signals are limited to a larger degree
because they are only capable of playing what has been recorded in the first
place.
Digital
signals take the original recording and turn it into the sample of numbers at
certain intervals instead of using the original recordings. Afterwards, the
number will be stored onto the digital device and then turned into a voltage
wave, which enables people to produce more sophisticated recordings. Therefore,
the majority of people would agree that digital signals are of much higher
quality although they still prefer the more authentic and rough sound of a
record being played.
Analog
signals are also different from digital signals in terms of the quality loss
over time. The quality of signals will be damaged a little each time video
tapes and other analog devices are made use of to play these signals. On the
other hand, the quality of signals won’t be damaged at all no matter how many
times they are going to be played by digital music and video devices. The
signal can always remain the same as the original one as long as the number can
be read. This is a rather compelling advantage digital signals have over analog
signals.
