On a method of preprocessing of sound base

Mikhail N. Gusev, Vladimir M. Degtyarev, V. V. Sitnikov
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Abstract

In this report we describe the algorithm of sound fragments preprocessing, making sound base used in system of synthesis of speech under the text. Concatenative synthesis qualities are determined by quality of sound base in many respects. Each period has some initial phase, and periods, following one by one, not necessarily have identical initial phases by numbering a speech signal. Presence of initial phases creates problems at the analysis and updating, both the separate periods, and sounds as a whole. It is required to result a signal in a zero phase on frequency of the basic tone in the beginning of each period for elimination of distortions on joints of the periods and reductions of the distortions arising at their updating. Moreover values of last sample in all periods should coincide. Described preprocessing of sound base allows reduce considerably the high-frequency distortions arising at updating of sound fragments. The sound base contaming speech fragments, given to zero initial phases, allows receive synthesized speech with higher quality signal, than the sound base containing speech fragments with casual initial phases.
一种声基的预处理方法
本文描述了语音片段预处理算法,使语音库应用于文本语音合成系统。串联合成的质量在很多方面是由音基的质量决定的。每个周期都有一些初始阶段,并且通过对语音信号进行编号,一个接一个的周期不一定具有相同的初始阶段。初始阶段的存在会在分析和更新中产生问题,无论是单独的阶段,还是作为一个整体的声音。要求在每个周期开始时,在基本音的频率上产生一个零相位的信号,以消除周期关节上的失真,并减少其更新时产生的失真。此外,所有周期的最后一个样本值应一致。所描述的声基预处理允许大大减少在声音片段更新时产生的高频失真。初始相位为零的包含语音片段的音基比初始相位随机的包含语音片段的音基接收到的合成语音信号质量更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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