1 Introduction
For many years, two main advantages of the digital processing of analog signals have been known.
First, if the transmission system is properly specified and dimensioned, transmission quality is independent of the transmission channel or medium. This means that, in theory, factors which affect the transmission quality (noise, non-linearity, etc.) can be made arbitrarily low by proper dimensioning of the system.
Second, copies made from an original recording in the digital domain are identical to that original; in other words, a virtually unlimited number of copies, which all have the same basic quality as the original, can be made. This is a feature totally unavailable with analog recording.
A basic block diagram of a digital signal ...
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