Efficient representation of short-time phase based on group delay
Efficient representation of short-time phase based on group delay
复制标题
基于群时延的短时相位高效表示
DOI：
10.1109/icassp.1998.675401
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Hideki Kawahara
中科院分区：
文献类型：
--
作者：
Hideki Banno;Jinlin Lu;Satoshi Nakamura;K. Shikano;Hideki Kawahara
基于相位特征的感知重要性的研究结果，提出了语音短时相位特征的有效表示。主观测试表明，该方法合成的语音与原始语音难以区分，数据压缩适中。所提出的表示使用语音群延迟的傅里叶反变换的低阶系数。它还减轻了传统语音编码算法中不可缺少的浊音/浊音判定问题。这些特征使我们的方法在语音变形等许多应用中非常有用。
An efficient representation of short-time phase characteristics of speech sounds is proposed, based on findings which suggest the perceptual importance of phase characteristics. Subjective tests indicated that the synthesized speech sounds by the proposed method are indistinguishable from the original speech sounds with a moderate data compression. The proposed representation uses lower-order coefficients of the inverse Fourier transform of the group delay of speech. It also alleviates the voiced/unvoiced decision, which is an indispensable part in conventional speech coding algorithms. These features make our method potentially very useful in many applications like speech morphing.