Vowel-based frequency alignment function design and recognition-based time alignment for automatic speech morphing

Masato Onishi, Toru Takahashi, T. Irino, Hideki Kawahara
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引用次数: 1

Abstract

New design procedures of time-frequency alignment for automatic speech morphing are proposed. The frequency alignment function at a specific frame is represented as a weighted average of vowel alignment functions based on similarity to each vowel. Julian, an open source speech recognition system, was used to design a time alignment function. Objective and subjective tests were conducted to evaluate the proposed method, and test results indicated that the proposed method yields comparable naturalness to the manually morphed samples in terms of time alignment. The results also illustrated that the proposed frequency alignment provides significantly better naturalness than morphed samples without frequency alignment.
语音自动变形中基于元音的频率对齐函数设计和基于识别的时间对齐
提出了语音自动变形时频对准的新设计方法。特定帧的频率对齐函数表示为基于每个元音相似度的元音对齐函数的加权平均值。Julian,一个开源的语音识别系统,被用来设计一个时间对齐功能。进行了客观和主观测试来评估所提出的方法,测试结果表明,所提出的方法在时间对齐方面与人工变形样品产生相当的自然度。结果还表明,与没有频率对准的变形样本相比,所提出的频率对准提供了明显更好的自然度。
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