VERY-LOW BIT-RATE SPEECH CODING USING A DIPHONE-BASED RECOGNITION ANDSYNTHESIS APPROACH

High compression rates of speech signals may be achieved by coding sch emes based on relevant linguistic segments. A system is described that relies on a diphone recogniser as the coder and on a speech synthesis er reproducing speech starting from a diphone codebook as the decoder. The spoken message is encoded in textual (phoneme labels) plus prosod y representation. This speech coding technique may be used for voice m ail or phone communication over low bit rate channels.