四川大学学报（自然科学版）2012，Vol.49Issue(4)：823-828,6.DOI:10.3969/j.issn.0490-6756.2012.04.020
一种单通道语音倒谱域去混响新方法
A new method of speech dereverberation of single channel with cepstral processing
摘要
Abstract
Most of the algorithms of dereverberation are based on short-term analysis, which inevitably bring the truncation error. If we dereverberate the reverberation voice by inverse filter, room impulse response is limited to minimum phase. A noval single-channel algorithm of dereverberation using long term frame analysis is proposed in this paper. First, the minimum phase cepstrum component of the reverberation speech signal was calculated in long-term frame. Then the stop-band filter was used to get the minimum phase component of dereverberation speech in the cepstral domain. Afterwards, mod of dereverberation speech in frequency domain can be estimated according to minimum-phase cepstrum theory. Finally, since the human ear is insensitive to the phase information, the dereverberation speech can be synthesized with the estimated mod and the phase of reverb speech signal in frequency domain. Then the time domain waveform of dereverberated voice was obetained by inverse Fourier transform. Experiments show that the algorithm has a good dereverberated performance.关键词
复倒谱/倒谱阻带滤波/语音去混响/长时帧分析Key words
complex cepstrum/ band-stop cepstrum filter/ speech dereverberation/ long-term frame analysis分类
信息技术与安全科学引用本文复制引用
余帅,何培宇..一种单通道语音倒谱域去混响新方法[J].四川大学学报（自然科学版）,2012,49(4):823-828,6.基金项目
国家自然科学基金(61071159) （61071159）
