Speech synthesizer, speech synthesizing method, and program

A speech synthesizing method comprising:

• a step of generating target parameters on an element-by-element basis from information containing at least phonetic symbols, the target parameters being a parameter group through which speech can be synthesized;
• a step of selecting a speech element that corresponds to the target parameters, from a speech element database which stores, on an element-by-element basis, pre-recorded speech as speech elements that are made up of a parameter group in the same format as the target parameters;
• a step of synthesizing the parameter group of the target parameters and the parameter group of the speech element by finding the similarity per dimension of the target parameters and the speech element, selecting, based on the similarity per dimension, the speech element in the case where the target parameters and the speech element are judged as being similar and select, based on the similarity per dimension, the target parameters in the case where the target parameters and the speech element are judged as not being similar, and integrating the parameter groups on an element-by-element basis;
• and
• a step of generating a synthetic speech waveform based on the synthesized parameter groups.

A program stored on computer storage memory which causes a computer to execute steps for speech synthesizing, the steps comprising:

• a step of generating target parameters on an element-by-element basis from information containing at least phonetic symbols, the target parameters being a parameter group through which speech can be synthesized;
• a step of selecting a speech element that corresponds to the target parameters, from a speech element database which stores, on an element-by-element basis, pre-recorded speech as speech elements that are made up of a parameter group in the same format as the target parameters;
• a step of synthesizing the parameter group of the target parameters and the parameter group of the speech element by finding the similarity per dimension of the target parameters and the speech element, selecting, based on the similarity per dimension, the speech element in the case where the target parameters and the speech element are judged as being similar and select, based on the similarity per dimension, the target parameters in the case where the target parameters and the speech element are judged as not being similar, and integrating the parameter groups on an element-by-element basis;
• and
• a step of generating a synthetic speech waveform based on the synthesized parameter groups.