If the amplitude of the accumulated waveform over a given sample period is less than that of the previous sample period, the converter outputs a “0.” This is a kind of pulse density modulation, as ...

The "pulse code" in PCM comes from the telephone company's method of sending a pulse or no pulse down the line. Mu-Law signals typically ride on a single 64 Kbps DS0 channel in a T1 line.

Pulse Width Modulation (PWM): A method for controlling power delivery by adjusting the on/off duration of pulses in a periodic waveform. Electromagnetic Interference (EMI): ...