2. A speech synthesizing method according to claim 1, in which the step of segmenting the speech waveform of each word or syllable uttered with the type-0 accent comprises the step of: determining a length of each speech piece uttered with the type-0 accent according to a longest matching method, and the step of segmenting the speech waveform of each word or syllable uttered with the type-1 accent comprises the step of: determining a length of each speech piece uttered with the type-1 accent according to the longest matching method.
1. A speech synthesizing method comprising the steps of for a plurality of words or syllables, accumulating in a waveform database a plurality of speech waveforms of each word or syllable, including a first speech waveform of the word or syllable uttered with a type-0 accent and a second speech waveform of the word or syllable uttered with a type-1 accent, with a phonemic transcription of the word or syllable, one of the speech waveforms of the word or syllable corresponding to a correct utterance of the word or syllable to be synthesized, and another of the speech waveforms of the word or syllable corresponding to an incorrect utterance of the word or syllable to be synthesized; segmenting the speech waveform of each word or syllable uttered with the type-0 accent immediately before a vowel steady section or an unvoiced consonant of the speech waveform to extract a plurality of speech pieces derived from the type-0 accent; segmenting the speech waveform of each word or syllable uttered with the type-1 accent immediately before a vowel steady section or an unvoiced consonant of the speech waveform to extract a plurality of speech pieces derived from the type-1 accent; retrieving a plurality of type-0 accent candidates and type-1 accent candidates for a series of used speech pieces expressing a phonemic transcription of a remarked speech to be synthesized and an accent type of the remarked speech from the waveform database according to the phonemic transcription of the remarked speech to be synthesized; for each of the used speech pieces, determining the used speech piece as either a type-0 accent candidate or a type-1 accent candidate according to the accent type of the remarked speech to be synthesized and a position of the used speech piece in the remarked speech to be synthesized; and synthesizing the remarked speech by connecting the used speech pieces to each other to produce a series of used speech pieces.