Speech Enhancement Algorithm with Leading-in Delay

Since traditional speech enhancement algorithms usually only use the information of the current frame and the previous frame for estimation of the speech spectrum,which may cause variable level noises and music noise,a improved speech enhancement algorithm with leading-in delay is proposed to solve this problem.By using the information of the frame after the current frame,a two-way search method which is similar to the method of path search can be adopted to eliminate the influence of variable level noises and music noise.An improved non-causal priori SNR estimation method is employed in the priori SNR estimation to eliminate the music noise caused by the inadequate of smooth in low SNR.Based on this,a complete speech enhancement algorithm is constructed.The experimental results show that the proposed algorithm is noy affected by the variable level noise,but can suppress the music noise and residual background noise effectively.