检索结果-内蒙古大学图书馆

A novel approach for artificial bandwidth extension of speech signals by LPC technique over proposed gsm FR NB coder using high band feature extraction and various extension of excitation methods

引用

INTERNATIONAL JOURNAL OF SPEECH TECHNOLOGY 2015年第1期18卷 57-64页

作者： Bhatt, Ninad Kosta, Yogeshwar CKPCET EC Dept Surat Gujarat India Marwadi Educ Fdn Rajkot Gujarat India

This research addresses an issue of wide band (WB) speech transmission (having cut-off frequency f(c) = 8 kHz) over standard narrow band (NB) communication link (supporting bandwidth of 300-3,400 Hz). A long transition time for technological up-gradation from NB to WB systems eventually lead to development of backward compatible techniques such as artificial bandwidth extension (ABE) which is capable of providing bandwidth of 50-7,000 Hz, in turn contributing toll quality recovered speech at receiving end. This paper investigates a novel approach to compute high band (HB) features using linear predictive coding (LPC) technique at transmitter from given input WB speech corpus. These encoded features are embedded into bit stream of proposed gsm full rate 06.10 NB speech coder using joint source coding and data hiding technique and then transmitted to receiver. At receiver, these HB features are extracted to reproduce HB recovered speech using watermark extraction algorithm and for the same different extension of excitation techniques have been adopted and implemented. An e-test bench is created to implement this proposed ABE coder in MATLAB and series of simulations are carried out using Subjective (mean opinion score-MOS) and Objective (perceptual evaluation of speech quality-PESQ) analysis. Obtained results for both analyses advocate performance improvement of proposed ABE coder over legacy gsm 06.10 FRNB coder for various extension of excitation techniques.

关键词： proposed gsm full rate coder Artificial bandwidth extension Subjective analysis Objective analysis Linear predictive coding

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：