Pulse Code Modulation

Complete digitization process: Sampling -> Quantization -> Encoding

Real-World Applications

The foundation of PSTN traditional telephone networks. G.711 standard specifies 64kbps voice coding (8kHz × 8bit). WAV audio files are also typical PCM format.

Experiment Steps

1. Quantization Steps: Observe the stepped waveform after quantization
2. Quantization Noise: Fewer bits mean larger error

Simulation Experiment

Functions: models.channel.addNoise()