Waveform data read out from a period memory (110) and from an impulse response waveform memory (101) are superimposed in an overlap unit (102). The readout from an aperiodic waveform memory (120) is added to the combination in a simple addn. unit (103). After double buffer storage (104) the result is converted (105) to analogue form and low-pass filtered (111) to produce the synethetic speech (106). A digital analyser sepg. periodic and aperiodic waveforms is also claimed. ADVANTAGE - High speech quality is maintained over a long period by synchronous addn. of periodic and aperiodic constituents of waveform.
Speech synthesiser using periodic and aperiodic waveform addn. - stores predetermined tone period for use in overlapping of partial waveforms before addn. of aperiodic contribution