【作者】 窦庚欣； 鲍长春；

【Author】 Geng-xin DOU,Chang-chun BAO (School of Electronic Information and Control Engineering,Beijing University of Technology,Beijing 100022,China)

【机构】 北京工业大学电子信息与控制工程学院；

【摘要】 在不增加信息量的前提下,对语音信号进行频带扩展,以提高语音的听觉质量,已经成为人们研究的热点。本文围绕语音信号频带扩展中的两个重要问题——谱包络的重建和宽带激励信号的产生,分析了传统基于矢量量化的频带扩展方法中的不足。文章中针对这两个问题,对谱包络的重建方法作了改进,并提出了一种新的宽带激励信号产生方法。实验结果均表明:改进的算法明显优于传统算法。更多还原

【Abstract】 To improve the acoustical quality of speech,the technique that bandwidth expansion of speech without extra information has been researched by more and more people.Aiming at two main issues for bandwidth expansion of speech-the reconstruction of frequency spectral envelope and the production of wideband excitation-we analyze the disadvantage of a conventional approach.After that,we improve the measures of the reconstruction of frequency spectral envelope and propose an algorithm of the production of wideband excitation in this paper.Our experimental results show mat the proposed algorithm in the paper is much better than conventional approach.更多还原