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| 基于LPC的语音信号预测仿真分析 |
| Simulation analysis of speech signal prediction based on LPC |
| 投稿时间:2014-05-08 |
| DOI:10.3969/j.issn.1005-5630.2015.01.015 |
| 中文关键词: 语音信号 参数编码 线性预测编码 仿真分析 |
| 英文关键词:speech signal parameter coding linear prediction coding(LPC) simulation analysis |
| 基金项目:黑龙江省自然科学基金资助项目(F201227) |
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| 中文摘要: |
| 参数编码是针对提取的语音信号特征参数进行编码,主要目的是使重建的语音信号具有尽可能高的可懂度。线性预测编码(LPC)是一种有实用价值的经典方法。通过对线性预测编码地原理分析,选择自相关算法中的莱文逊-杜宾算法求得预测系数;在确定预测阶数和增益后,对一段实际的语音信号进行了预测仿真分析。实验结果表明,预测波形最大残差小于0.3%。 |
| 英文摘要: |
| Parameter coding is to extract the characteristic of speech signal. The main purpose is to improve the intelligibility of the reconstruction of speech signal. Linear prediction coding(LPC)is a valuable method. By analyzing the principle of LPC, we choose Levinson-Durbin algorithm for prediction coefficient. After determining the forecast order number and gain, we carry out the prediction simulation of a real speech signal. The experimental results show that maximum residual error of the predicted waveform is less than 0.3%. |
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