电子学报2012，Vol.40Issue(12)：2501-2506,6.DOI:10.3969/j.issn.0372-2112.2012.12.023
基于Volterra级数预测的音频频带扩展
Audio Bandwidth Extension Based on Volterra Series
摘要
Abstract
In this paper,a bandwidth extension algorithm of wideband audio signal is proposed based on Volterra series with the nonlinear analysis method. The Gaussian mixture model and codebook mapping algorithms are used to adjust the spectrum envelope and energy gain of the extended audio signal separately.Test results indicate that the proposed method outperforms the existing nonlinear algorithms.When the noise-filling method used in ITU-T G.722.1C super-wideband audio codec is replaced by the proposed algorithm,the super-wideband audio quality is improved at 24 kbps.关键词
频带扩展/Volterra级数/高斯混合模型/码本映射Key words
bandwidth extension/ Volterra series/ Gaussian mixture model/ codebook mapping分类
信息技术与安全科学引用本文复制引用
张兴涛,鲍长春,刘鑫,张丽燕..基于Volterra级数预测的音频频带扩展[J].电子学报,2012,40(12):2501-2506,6.基金项目
国家自然科学基金(No.61072089,No.60872027) （No.61072089,No.60872027）
北京市自然科学基金(No.4082006) （No.4082006）
北京市属高等学校人才强教计划资助 （）
北京工业大学第十届研究生科技基金(No.ykj-2012-7001) （No.ykj-2012-7001）
