Evaluation of Synthesized Speech by Using Mismatch Negativity(<Special Issue>INNOVATIVE BIOMEDICAL TECHNOLOGIES and INFORMATICS, BMFSA2008)
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概要
- 論文の詳細を見る
The purpose of our study is to evaluate the quality of synthesized speech by measuring the mismatch negativity (MMN) of the event-related potentials (ERPs). The plosive consonant-vowel (CV) pair /ki/ was sinusoidally interpolated using two kinds of extrema. One was exact acquisition in the filtered speech with a passing bandwidth of one octave and a sampling frequency of 1 MHz, and another was the substitution with both the phase and quantization errors in the corresponding data at a low rate of 44.1 kHz. Subjects were presented with a repetitive stimulus of a conventional recording /ki/, randomly replaced at a 14.3% probability by a deviant stimulus. As compared with the MMN amplitude when presenting another plosive syllable /tsu/ for the deviant stimulus, the absolute value of MMN is significantly reduced by 2.63/μV at the left central site (C3) and by 2.31μV at the right (C4) when using the exact synthesis, and by 1.62μV at C3 and 1.98μV at C4 when using the substituted one. These results have been interpreted as the evidence, in which the synthesized speech was phonetically equivalent to conventional recording.
- バイオメディカル・ファジィ・システム学会の論文
著者
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Maeda Yasunari
Department Of Computer Sciences Kitami Institute Of Technology
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Kakui Kenji
Department Of Computer Sciences Kitami Institute Of Technology
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Fujiwara Yoshitaka
Department Of Computer Sciences Kitami Institute Of Technology
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Yoshida Hideki
Department of Applied Biology,Kyoto Institute of Technology Graduate School
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