It is a type of Pulse modulation as in PPM the position of pulse
of carrier pulse train is varied in accordance with the modulating
signal.
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The difference between pulse code modulation and delta
modulation is that pulse code modulation is a method of encoding
audio information digitally while delta modulation is a method that
converts analog to digital signal.
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Explain with diagram the technique Pulse-width modulation?
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Actually there are four:
width
amplitude
position
code
Of these four pulse code modulation is digital while the other three are analog.