Speech morphing by independent interpolation of a spectral envelope and source excitation
Speech morphing by independent interpolation of a spectral envelope and source excitation
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通过频谱包络和源激励的独立插值实现语音变形
DOI：
10.1002/(sici)1520-6440(199903)82:3
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
F. Itakura
中科院分区：
文献类型：
--
作者：
Hideki Banno;K. Takeda;K. Shikano;F. Itakura
提出了一种基于频谱包络和源信号逐级插值的语音变形算法。基本变形方案为；1)确定原始语音和目标语音单位波形的时间对应关系，2)将语音频谱分离为包络和声源，3)获得原始语音和目标语音在每个包络下的频谱通道的频率对应关系，4)对源信号和包络进行插值，5)构建单位波形，6)通过PSOLA生成变形语音。客观测试表明，该方法在实际语音中插入两个元音时，与基于递进替换的方法相比，可将频谱失真降低1.9 dB。该方法的有效性也通过主观测试得到证实，其中89%（男性对女性）或93%（女性对男性）的受试者更喜欢所建议的方法。©1998 Scripta Technica, electronic Comm jp3, 82(3): 22 - 30,1999
A speech morphing algorithm based on progressive interpolation of spectral envelopes and source signals is proposed. The basic morphing scheme is; 1) determine the time correspondence for unit waveforms of original and target speech, 2) separate speech spectra into an envelope and a sound source, 3) obtain the frequency correspondence for spectral channels of original and target speech for each envelope, 4) interpolate both source signal and envelope, 5) construct a unit waveform, and 6) generate morphing speech by PSOLA. In the objective test, the proposed method can reduce the spectral distortion by 1.9 dB in comparison with the method based on progressive substitution of spectra, when it is used for interpolating two vowels in a real speech. The effectiveness of the method is also confirmed by a subjective test in which 89% (male to female) or 93% (female to male) subjects preferred the proposed method. © 1998 Scripta Technica, Electron Comm Jpn Pt 3, 82(3): 22–30, 1999