线谱对——回顾

COMSIG 88@m_Southern African Conference on Communications and Signal Processing. Proceedings Pub Date : 1988-06-24 DOI:10.1109/COMSIG.1988.49292

A.C. Smith, J.J.D. van Schalkwyk

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引用次数: 1

摘要

线谱对(LSPs)是线性预测声码器声道参数的一种替代编码方法。这些参数为量化和编码的感知效应提供了更好的控制。讨论了确定lsp参数的两种方法，一种是利用快速傅里叶变换，另一种是利用比率滤波器。与40位线性预测编码相比，可节省25%的编码比特率。

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Line-spectrum pairs-a review

Line-spectrum pairs (LSPs) are presented as an alternative coding method for the vocal tract parameters of a linear predictive vocoder. These parameters provide improved control over the perceptual effect of quantization and coding. Two methods for determining the LSP-parameters are discussed, one making use of the fast Fourier transform, and the other of a ratio filter. A saving of 25% in coded bit rate is achieved when compared to 40-bit linear predictive coding.<>

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COMSIG 88@m_Southern African Conference on Communications and Signal Processing. Proceedings

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