Title:
時間同期波形補間によるピッチプロトタイプ波形からの音声を合成するための音声合成方法および音声合成装置
Document Type and Number:
Japanese Patent JP4489959
Kind Code:
B2
Abstract:
In a method of synthesizing voiced speech from pitch prototype waveforms by time-synchronous waveform interpolation (TSWI), one or more pitch prototypes is extracted from a speech signal or a residue signal. The extraction process is performed in such a way that the prototype has minimum energy at the boundary. Each prototype is circularly shifted so as to be time-synchronous with the original signal. A linear phase shift is applied to each extracted prototype relative to the previously extracted prototype so as to maximize the cross-correlation between successive extracted prototypes. A two-dimensional prototype-evolving surface is constructed by unsampling the prototypes to every sample point. The two-dimensional prototype-evolving surface is re-sampled to generate a one-dimensional, synthesized signal frame with sample points defined by piecewise continuous cubic phase contour functions computed from the pitch lags and the phase shifts added to the extracted prototypes. A pre-selection filter may be applied to determine whether to abandon the TSWI technique in favor of another algorithm for the current frame. A post-selection performance measure may be obtained and compared with a predetermined threshold to determine whether the TSWI algorithm is performing adequately.
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Inventors:
Das, Amitaba
Choi, Eddie L. Tea
Choi, Eddie L. Tea
Application Number:
JP2000583002A
Publication Date:
June 23, 2010
Filing Date:
November 12, 1999
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
G10L19/04; G10L19/08; G10L13/00; G10L19/00; G10L19/02; G10L19/12; G10L19/14; G10L25/90
Domestic Patent References:
| JP10307599A |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Ryo Hashimoto
Toshio Shirane
Sadao Muramatsu
Ryo Hashimoto
Toshio Shirane