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On improving the intelligibility of synchronized over-lap-and-add (SOLA) at low TSM factor

机译:提高低TSM因子同步重叠和添加(Sola)的可懂度

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We propose an algorithm to modify the synchronized overlap-and-add (SOLA) technique. SOLA is a popular technique for time scale modification of speech and audio signal. It changes the time scale of the signal while maintaining the pitch information. However, when the time scale of the signal is compressed more, the synthesized speech of SOLA has high articulations rate that it becomes almost impossible for the human ear to comprehend. The proposed algorithm can enhance the quality if the time scaled signal by using a time varying time scale factor which is locally adapted to the input signal. It is found that the intelligibility of the synthesized signal using the proposed algorithm is considerably better than the one synthesized from simple SOLA.
机译:我们提出了一种修改同步重叠和添加(SOLA)技术的算法。 Sola是一种流行的时尺度修改语音和音频信号的流行技术。它在保持音高信息的同时改变信号的时间尺度。然而,当信号的时间尺度被压缩时,Sola的合成语音具有高的铰接率,即人耳就会理解它几乎不可能。如果通过使用本地适应输入信号的时间变化的时间比例因子,则该算法可以提高质量。结果发现,使用该算法的合成信号的可理解性比来自简单SOLA合成的合成信号的可理解性大得多。

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