Patent ID: 6975987
Filing Date: 2005-12-13
Classification: G10L

Abstract:
1. A speech synthesis device comprising: speech database storing means for storing sample waveform data in a speech unit and a speech database created by way of associating the sample sound waveform data with their corresponding phonetic information; speech waveform composing means for dividing phonetic information into speech units upon receiving the phonetic information of speech sound to be synthesized, for obtaining sample speech waveform data corresponding to the each phonetic information in a speech unit from the speech database, and for generating speech waveform data to be composed by means of concatenating the sample speech waveform data in speech units; and analog converting means for converting the speech waveform data received from the speech waveform composing means into analog signals; wherein the speech waveform composing means comprises pitch converting means for converting pitch by means of processing a segment of a waveform in which the waveform is converging on a segment just before a minus peak during a periodical unit of speech waveform data, at said segment the speech waveform being depending on vocal tract shape and being attending and converging on the minus peak.