Noise Reduction in Speech Coding Technique Used in GSM

Abstract

The improvement in speech quality in mobile communication can be made by reducing the noise content. The low bit rate speech coding technique such as RPE-LTP in GSM with noise signal filtering can increase the complexity of complete mechanism. The paper presents noise signal reduction in RPE-LTP speech coding technique by using Zero Crossing Rate (ZCR) and pitch values. By using this technique quality measures of speech coding technique such as SNR, PESQ, MSE are improved as compared to RPE-LTP technique without affecting complexity.