信号处理
信號處理
신호처리
SIGNAL PROCESSING
2014年
9期
1019-1024
,共6页
人耳听觉特征%Gammatone滤波器%多级线性预测%去混响%去噪
人耳聽覺特徵%Gammatone濾波器%多級線性預測%去混響%去譟
인이은각특정%Gammatone려파기%다급선성예측%거혼향%거조
human auditory characteristics%Gammatone filter banks%multiple-step linear prediction%dereverberation%denoise
在相对封闭的空间内，使用一些通讯设备时，距离声源较远的麦克风接收到的语音信号通常会被混响和噪声所污染，这些干扰信号会在很大程度上降低语音可懂度。带噪的混响语音经过去混响和消噪算法处理后，常常会残留一些音乐噪声，使得人耳听起来很不舒服。本文根据人耳对不同频带的听觉特征，引入Gammatone听觉滤波器组，提出了Gammatone滤波器修正的多级线性预测去混响算法。实验结果证明，新算法有效的解决了去混响及消噪后的残留音乐噪声问题，提高了语音的清晰度和舒适度。
在相對封閉的空間內，使用一些通訊設備時，距離聲源較遠的麥剋風接收到的語音信號通常會被混響和譟聲所汙染，這些榦擾信號會在很大程度上降低語音可懂度。帶譟的混響語音經過去混響和消譟算法處理後，常常會殘留一些音樂譟聲，使得人耳聽起來很不舒服。本文根據人耳對不同頻帶的聽覺特徵，引入Gammatone聽覺濾波器組，提齣瞭Gammatone濾波器脩正的多級線性預測去混響算法。實驗結果證明，新算法有效的解決瞭去混響及消譟後的殘留音樂譟聲問題，提高瞭語音的清晰度和舒適度。
재상대봉폐적공간내，사용일사통신설비시，거리성원교원적맥극풍접수도적어음신호통상회피혼향화조성소오염，저사간우신호회재흔대정도상강저어음가동도。대조적혼향어음경과거혼향화소조산법처리후，상상회잔류일사음악조성，사득인이은기래흔불서복。본문근거인이대불동빈대적은각특정，인입Gammatone은각려파기조，제출료Gammatone려파기수정적다급선성예측거혼향산법。실험결과증명，신산법유효적해결료거혼향급소조후적잔류음악조성문제，제고료어음적청석도화서괄도。
When people use communication equipment in an enclosure room,the speech signal captured by a distant mi-crophone is usually contaminated by reverberation and noise,which will severely degrades the speech intelligibility.After the noisy reverberant speech signal is processed with denoise and dereverberation algorithms,residual“musical noise”has a great effect on the speech intelligibility and auditory comfort level.In this paper,we introduced Gammatone filter banks which were designed to simulate the human basilar membrane response to sound input,and used them to smooth and modify the gain function obtained by spectral subtraction method.Experimental results showed that the new algorithm suppressed the “musical noise”efficiently and consequently improved the speech intelligibility and auditory comfort level.
