DOPPLER SPEECH GENERATION METHOD AND APPARATUS.

摘要

A method of generating a natural Doppler speech even in the segmented Doppler mode. After the (I) and (Q) components of a Doppler signal are transformed by the Hilbert transformation into the left aural signal (L) and righ aural signal (R), the interval waveform (21) between the zero cross points of the aural signals (L) and (R) is taken out so as to form the positive side interval waveform (21p) which is produced by making the sign of the interval waveform (21) positive, and the negative side interval waveform (21n) which is produced by making its sign negative. In the order of the appearances of the interval waveforms (21,22, ...), a pair of the positive and negative side interval waveforms of each of the interval waveforms are continuously connected to produce a double length aural signal (W1). The double length aural signals (W1, W2, ...), of the respective periods in the pulse Doppler mode are connected in order to obtain a continuous aural signal.