Speech Enhancement Algorithm

The goal of Speech Enhancement is withdrawing as far as possiblethe pure primitive Speech from the noise Speech.But because all the noise signal is stochastically produced, more over reasons and characteristics are very complexed. Therefore, completely eliminates the noise is unimpossible. The actual Speech Enhancement the goals mainly have two targets: improvement Speech quality, eliminates the background noise, causes the listener to be glad accepted, does not feel weary; Improves the Speech quality and the understandability.The paper first introduced each Speech Enhancement method, and the present commonly used several methods like spectrum subtraction,the Uygur natrium filter algorithm, minimum mean square error and so on , Based on many Speech enhancements algorithm in the eliminate the noise effect and the subjective seeing and hearing under the effect is not good ,this article has emphasisly carried on following several aspects research:This article has conducted the research to the traditional spectrum subtraction, carries on the speech enhancement has "the music noise" obviously the flaw in view of the traditional spectrum subtraction, proposed one kind reduces the parameter based on speech signal residual error dynamic alignment spectrum the spectrum subtraction. Indicated through the theoretical analysis and the experimental result, this method carries on when the speech enhancement "the music noise" obviously is weaken. Also had guaranteed more voiceless sounds existence, enhanced the speech understandability.This article has conducted the research to the MMSE-LSA speech enhancement algorithm, after carries on the speech strengthens can remain has some "the music noise" the flaw in view of this algorithm,proposed one kind improves this algorithm the method, that is ,in recarrieson the biggest estimate to each in the foundation to be allowed the dynamic adjustment estimate in the formula parameter alpha, betathe value. Improves the algorithm through the simulation experimentthe speech enhancement effect to carry on the examination regarding this, this compared to the traditional MMSE speech enhancement method in...