Adaptive Speech Enhancement using DSP Processor

Abstract

Speech and text is the main medium for human communication .Digital signal processing plays a central role in the development of modern communication and information processing systems. In audio processing background noise is removed and required noise is enhanced using by adaptive filter and LMS algorithm. The filtered signal is compared to the original noise-free speech signal in order to highlight the level of attenuation of the noise signal. The result shows that the noise signal is successfully canceled by the developed adaptive filter. The difference of the noise-free speech signal and filtered signal are calculated and the outcome implies that the filtered signal is approaching the noise-free speech signal upon the adaptive filtering. The LMS adaptive filter algorithm shows significant noise cancellation at lower frequency range.