The conversion of an analog speech signal to a pulse code modulation (PCM) digital signal involves all of the following steps EXCEPT:

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Quizplus · Accepted Answer

Amplitude modulation is not involved in the conversion of an analog speech signal to a PCM digital signal. The other steps listed are all part of the process. Low pass filtering removes any high-frequency components above the Nyquist frequency to prevent aliasing, periodic sampling takes regular samples of the signal, quantizing discretizes the sample values into digital levels, and companding reduces the quantization error by applying a nonlinear compression and expansion to the signal.

The Conversion of an Analog Speech Signal to a Pulse