Back Modulació per densitat d'impuls Catalan Pulsdichtemodulation German Modulación PDM Spanish مدولاسیون تراکم پالس Persian Pulssintiheysmodulaatio Finnish パルス密度変調 Japanese Modulacja gęstości impulsów Polish Modulação por densidade de pulso Portuguese 脉冲密度调制 Chinese
| Passband modulation |
|---|
 |
| Analog modulation |
| Digital modulation |
| Hierarchical modulation |
| Spread spectrum |
| See also |
Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse-code modulation (PCM); rather, the relative density of the pulses corresponds to the analog signal's amplitude. The output of a 1-bit DAC is the same as the PDM encoding of the signal.