Adaptive Differential Pulse Code Modulation (ADPCM) is an effective algorithm of speech coding. It adopts the method of adaptive quantization and adaptive prediction to compress pulse code modulation (PCM) signal.

• 自适应差分脉冲编码调制(ADPCM)采用自适应量化方法和自适应预测方法,对PCM(脉冲编码调制)语音信号进行再压缩,是一种有效的语音信号波形编码压缩方案。