Abstract: A method for speech analysis applicable to a speech analysis/synthesis system employed for producing a synthetic speech. Voiced and unvoiced segments of input speech signals X(n) are discriminated. An amplitude information A(.omega.) and a phase information P.sub.X (.omega.) are extracted from the voiced segments of the input speech signals. A pitch period is detected from the voiced segments of the input speech signals. A pulse train S(n) as a sound source information is generated so that its period corresponds on the time scale to the detected pitch period of the input speech signals. A phase information P.sub.S (.omega.) is extracted from the pulse train S(n). A difference P(.omega.) between the phase information P.sub.S (.omega.) of the pulse train S(n) and the phase information P.sub.X (.omega.) of the input speech signal is found and is supplied as the phase information of the desired one-pitch period within the input speech signals.

Abstract: An interface device is provided for coupling a host device having a network interface to a computer network having a predetermined communications medium and a predetermined communications physical layer. The interface device comprises a plug member having a first connector affixed to it for coupling to the network interface of the host device. The interface device further includes front end circuitry disposed within the plug member, the front end circuitry being selectable to couple to the predetermined communications medium and to interact with the predetermined physical layer.