Higher Frequency Components Estimating Method using Codebooks based on Formants

摘要：

A talk with communication device, such as a cell phone, loses information of language because of a limited frequency range. Currently, we research algorithm estimating higher frequency components from the limited signal. We propose method to estimate codebooks using formants based on Hilbert transform. Firstly we prepare temporary limited signals from the original signals from raw voice sound sources. And then we derive the estimated signals from limited signal using proposed method. The experimental results successfully demonstrate that the method restores a part in higher frequency. As shown in the characteristic frequency, the proposed method is better than only using Hilbert transform, comparing to formant of the based signal. The estimated signal can be heard clearly when the formant in the original signal becomes closer.

关键词： component Estimatig high frequency components Hilbert transform codebooks formant LPC LSP

作者: Yuta Shoji Yuki Hiramatsu Yohei Fukumizu Hironori Yamauchi

作者单位: Graduate School of Science and Engineering dept. Ritsumeikan Univercity 1-1-1, NojiHigashi, Kusatsu, Shiga, 525-8577, Japan

会议类型: 国际会议

会议名称: 2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

会议地点: 上海

会议语种:英文

页码: 2435-2438

在线出版日期: 2011-10-15（万方平台首次上网日期，不代表论文的发表时间）