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1. 发明授权

US06208958B1 Pitch determination apparatus and method using spectro-temporal autocorrelation 有权
标题翻译：使用频谱自相关的音调确定装置和方法
公开(公告)号：US06208958B1
公开(公告)日：2001-03-27
申请号：US09226115
申请日：1999-01-07
申请人： Yong-duk Cho , Moo-Young Kim
发明人： Yong-duk Cho , Moo-Young Kim
IPC分类号： G10L1302
CPC分类号： G10L25/90 , G10L25/06
摘要： A pitch determination apparatus and method using spectro-temporal autocorrelation to prevent pitch determination errors are provided. The pitch determination apparatus using spectro-temporal autocorrelation includes a formant bandwidth extension unit for extending a formant bandwidth to reduce the influence of the first formant with respect to an input voice, a temporal autocorrelation calculation unit for calculating an autocorrelation value of a time axial voice within a candidate pitch range with respect to a time axial speech signal output from the formant bandwidth extension unit, a spectral autocorrelation calculation unit for transforming the time axial speech signal output from the formant bandwidth extension unit into a frequency axial signal, and calculating an autocorrelation value between frequency axis amplitude spectrums within the candidate pitch range, an autocorrelation value synthesis unit for summing the autocorrelation values obtained by the temporal and spectral autocorrelation calculation units and obtaining a spectro-temporal autocorrelation value, and a pitch determination unit for determining a pitch having a maximum spectro-temporal autocorrelation value as a final pitch. According to this apparatus, pitch determination errors are reduced by determining a pitch using the temporal and spectral autocorrelation values, thus improving the quality of speech communication.
摘要翻译：提供了使用频谱自相关以防止音调确定误差的音调确定装置和方法。使用频谱自相关的音调确定装置包括：共振峰带宽扩展单元，用于扩展共振峰带宽以减少第一共振峰相对于输入声音的影响;时间自相关计算单元，用于计算时间轴向声音的自相关值在从共振峰带宽扩展单元输出的时间轴向语音信号的候选音调范围内，频谱自相关计算单元，用于将从共振峰带宽扩展单元输出的时间轴语音信号变换为频率轴向信号，并计算自相关在候选音调范围内的频率轴振幅谱之间的值;自相关值合成单元，用于对由时间和频谱自相关计算单元获得的自相关值求和并获得谱时间自相关值;以及音调确定单元，用于确定具有作为最终间距的最大频谱自相关值的音调。根据该装置，通过使用时间和频谱自相关值确定音调来减小音调确定误差，从而提高语音通信的质量。

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