电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2012年
7期
144-147
,共4页
语音增强%谱减法%短时幅度谱%多频带
語音增彊%譜減法%短時幅度譜%多頻帶
어음증강%보감법%단시폭도보%다빈대
speech enhancement%spectral subtraction%short-time amplitude spectrum%multi-band
针对传统谱减语音增强算法增强后的语音信号会残留明显的＂音乐噪声＂的问题,采用多频带谱减算法对其进行改进。改进算法的原理是将带噪的语音信号按照频率划分成不同的频带,并使这些频带之间互不交叠,根据频带内带有噪声的语音信号和噪声信号信噪比,利用自适应算法求得该频带的过减因子。仿真结果表明：改进多频带谱减算法的语音增强效果优于传统谱减法。
針對傳統譜減語音增彊算法增彊後的語音信號會殘留明顯的＂音樂譟聲＂的問題,採用多頻帶譜減算法對其進行改進。改進算法的原理是將帶譟的語音信號按照頻率劃分成不同的頻帶,併使這些頻帶之間互不交疊,根據頻帶內帶有譟聲的語音信號和譟聲信號信譟比,利用自適應算法求得該頻帶的過減因子。倣真結果錶明：改進多頻帶譜減算法的語音增彊效果優于傳統譜減法。
침대전통보감어음증강산법증강후적어음신호회잔류명현적＂음악조성＂적문제,채용다빈대보감산법대기진행개진。개진산법적원리시장대조적어음신호안조빈솔화분성불동적빈대,병사저사빈대지간호불교첩,근거빈대내대유조성적어음신호화조성신호신조비,이용자괄응산법구득해빈대적과감인자。방진결과표명：개진다빈대보감산법적어음증강효과우우전통보감법。
Aimed at addressing ＂music noise＂,as is evident in voice signals produced by conventional spectral subtraction speech enhancement algorithm,an improved multi-band spectral subtraction algorithm for a desired performance is proposed.The algorithm works by dividing noisy speech signal into different frequency bands according to frequency,preventing these bands from overlapping each other,and obtaining noise reduction factor for the band,depending on signal noise ratio between the speech signal with noise within the band and noise signal and using adaptive algorithm.The simulation results show that the improved multi-band spectral subtraction algorithm exhibits a better speech enhancement than conventional spectral subtraction speech algorithm.
