Waveform Interpolation Speech Coding Based on DCT

LIU Jing-yu; BAO Chang-chun; LI Ru-wei

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Waveform Interpolation Speech Coding Based on DCT

更新时间：2025-07-16

- Waveform Interpolation Speech Coding Based on DCT
- Acta Electronica Sinica Vol. 37, Issue 7, Pages: 1599-1605(2009)
- 作者机构：
  
  北京工业大学电子信息与控制工程学院语音与音频信号处理研究室,北京,100124
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN912.3
- Published：2009
- 稿件说明：
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LIU Jing-yu, BAO Chang-chun, LI Ru-wei. Waveform Interpolation Speech Coding Based on DCT[J]. Acta Electronica Sinica, 2009, 37(7): 1599-1605.
DOI：

LIU Jing-yu, BAO Chang-chun, LI Ru-wei. Waveform Interpolation Speech Coding Based on DCT[J]. Acta Electronica Sinica, 2009, 37(7): 1599-1605. DOI：

摘要

针对波形内插(Waveform Interpolation

WI)语音编码的特征波形分解问题

本文首先提出了基于离散余弦变换(Discrete Cosine Transform

DCT)的特征波形分解方法

避免了复杂的特征波形对齐运算;其次

针对WI的相位重建问题

提出了清/浊音相位判决和浊音相位分类的方法

提高了重建语音质量;最后

分别构建了速率为2.0kbps和1.6kbps的DCT-WI声码器.主观MOS分表明

2.0kbps的DCT-WI声码器质量优于2.4kbps MELP声码器

1.6kbps的DCT-WI声码器亦取得了良好的听觉效果.

Abstract

Characteristic waveform (CW) decomposition based on discrete cosine transform (DCT) is proposed firstly in waveform interpolation (WI) speech coding.The complicated CW alignment operation is cancelled by using this method.Secondly

a new unvoiced/voiced phase decision method and the classification method of voiced phase are proposed with respect to phase reconstruction.Finally

DCT-WI coders at 2.0kbps and 1.6kbps are designed

respectively.The subjective MOS test results indicate that the 2.0kbps DCT-WI coder outperforms 2.4kbps MELP coder and the 1.6kbps DCT-WI coder also has a good performance.

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Related Institution

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