现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2015年
11期
73-78,82
,共7页
郭逾%张二华%刘驰%杨子凡
郭逾%張二華%劉馳%楊子凡
곽유%장이화%류치%양자범
固话信道%噪声%语音参数%Mel频率倒谱系数%F比
固話信道%譟聲%語音參數%Mel頻率倒譜繫數%F比
고화신도%조성%어음삼수%Mel빈솔도보계수%F비
fixed telephone channel%noise%voice parameter%Mel-frequency cepstrum coefficient%F-ratio
通过对比麦克风与固话信道下语音信号的时域、频域参数,结合固话传输系统的特性,分析语音信号经过固话信道传输后,各参数的异同点以及固话信道对语音信号的影响。并采用F比的方法,分析麦克风信道和固话信道下语音信号MFCC特征参数的差异。实验结果表明,语音信号经过固话信道传输后,不仅造成信号的频率失真,还伴随有宽带噪声和共振型噪声。在MFCC特征参数方面,麦克风和固话信道的第二维MFCC参数差异最明显,低维参数相比高维参数差异较大,男性说话人特征参数相比女性说话人差异较大。
通過對比麥剋風與固話信道下語音信號的時域、頻域參數,結閤固話傳輸繫統的特性,分析語音信號經過固話信道傳輸後,各參數的異同點以及固話信道對語音信號的影響。併採用F比的方法,分析麥剋風信道和固話信道下語音信號MFCC特徵參數的差異。實驗結果錶明,語音信號經過固話信道傳輸後,不僅造成信號的頻率失真,還伴隨有寬帶譟聲和共振型譟聲。在MFCC特徵參數方麵,麥剋風和固話信道的第二維MFCC參數差異最明顯,低維參數相比高維參數差異較大,男性說話人特徵參數相比女性說話人差異較大。
통과대비맥극풍여고화신도하어음신호적시역、빈역삼수,결합고화전수계통적특성,분석어음신호경과고화신도전수후,각삼수적이동점이급고화신도대어음신호적영향。병채용F비적방법,분석맥극풍신도화고화신도하어음신호MFCC특정삼수적차이。실험결과표명,어음신호경과고화신도전수후,불부조성신호적빈솔실진,환반수유관대조성화공진형조성。재MFCC특정삼수방면,맥극풍화고화신도적제이유MFCC삼수차이최명현,저유삼수상비고유삼수차이교대,남성설화인특정삼수상비녀성설화인차이교대。
By comparing time?domain and frequency?domain parameters of voice signal in microphone channel and fixed telephone channel,the influence of parameter similarities,differences and fixed telephone channel on voice signal are analyzed in combination with the characteristics of the fixed telephone transmission system after the voice signal is transmitted through the fixed telephone channel. The difference of voice signal MFCC characteristic parameters in microphone channel and fixed tele?phone channel is analyzed with the method of F?ratio. The experimental results show that the frequency distortion of voice sig?nal,accompanying with wide?band noise and resonance noise,occurs after the voice signal is transmitted in the fixed telephone channel. In the aspect of MFCC characteristic parameters,the most obvious difference is the second dimensional MFCC parame?ter in microphone channel and fixed telephone channel,the difference in lower dimension is greater than that in higher dimen?sion,and the difference of characteristic parameter in male speakers is greater than that of female speakers.