PCM, DPCM, ADPCM

PCM is for audio applications

Pulse Code Modulation (PCM) 脈衝碼調變 (Wikipedia)

- μ-law PCM - USA/Japan
- A-law PCM - Europe

- Linear PCM (LPCM)
- Standard of compact discs and WAV files.

Differential PCM (DPCM) 差值脈衝編碼調變 (Wikipedia)

Adaptive DPCM (ADPCM) 適應性差值脈衝編碼調變 (Wikipedia)