Speech synthesis method and speech synthesizer

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(11)

EP 1 246 163 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	13.08.2003 Bulletin 2003/33

(43)	Date of publication A2:
	02.10.2002 Bulletin 2002/40

(21)	Application number: 02252159.5

(22)	Date of filing: 26.03.2002

(51)	International Patent Classification (IPC)⁷: G10L 13/02

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

26.03.2001 JP 2001087041
19.03.2002 JP 2002077096

(71)	Applicant: Kabushiki Kaisha Toshiba
	Tokyo 105-8001 (JP)

(72)	Inventors:
	Akamine, Masami, c/o Intellectual Property Div. Minato-ku, Tokyo 105-8001 (JP) Kagoshima, Takehiko, c/o Intellectual Property Div Minato-ku, Tokyo 105-8001 (JP)

(74)	Representative: Midgley, Jonathan Lee
	Marks & Clerk 57-60 Lincoln's Inn Fields GB-London WC2A 3LS GB-London WC2A 3LS (GB)

(54)	Speech synthesis method and speech synthesizer

(57) A speech synthesis method comprises selecting a predetermined formant parameters from formant parameters according to a pitch pattern, phoneme duration, and phoneme symbol string, generating a plurality of sine waves based on formant frequency and formant phase of the formant parameters selected, multiplying the sine waves by windowing functions of the selected formant parameters, respectively, to generate a plurality of formant waveforms, adding the formant waveforms to generate a plurality of pitch waveforms, and superposing the pitch waveforms according to a pitch period to generate a speech signal.

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