The Research on LMS and ΔPSD-Based Noise Reductio

• Main Authors: Yun-Chien Chang, 張云箐
• Other Authors: 黃紹華
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/8j5kuq

碩士 === 國立臺北科技大學 === 電機工程系研究所 === 95 === The LMS and ΔPSD-based method are employed to reduce the noise for the communication system. Three topics are employed to implement the noise reduction. First, the delta function of Power Spectrum Density is employed to distinguish the noise and un-noise signal. Second, the LMS(least-mean-square) method is employed to learn and reduce the noise adaptively. Third, the filter’s gain are employed to recover the gain of un-noise signal. The LMS and ΔPSD method are implemented in the VoIP to inspect the performance. The experimental results confirm that the LSM and ΔPSD-based method reduce the noise efficiently.