Wavelet speech enhancement based on voiced/unvoiced decision
Jong Kwan Lee, Chang D. Yoo · 한국소음진동공학회 국제학술발표논문집 · 2003
A wavelet-based speech enhancement algorithm for removing additive background noise from a single channel of noisy speech is proposed. In the algorithm, the enhancement is performed on a frame-by-frame basis, and each frame is classified into either voiced or unvoiced frame to deterimine the appropriate threshold in removing noise. The performance of the proposed algorithm is evaluated on Aurora 2 database, which consists of noisy English connected digits, and it was deterimined to be better than that of traditional wavelet based methods.