An adaptive filtering approach toward speech enhancement.
R. Frazier · 1975
The use of a digital comb filter for the separation of two speakers was formulated in previous efforts. An adaptive pitch synchronous filter has been developed as an alternative. This development stems from the characteristics and structure of the speech waveform. In the comb filtering development, there were tradeoffs between desired speaker distortion and undesired speaker separation. In the development of the adaptive filtering tech-niques, the results of these tradeoffs will be examined for possible improvements over the comb filtering techniques. A series of tests performed on test signal inputs compares the performance of both the comb and adaptive f i Itering systems. Included in an appendix are several of the main computer programs used in the computer implementation. A series of listening tests will be performed with these systems in future work making the appendix a necessary part of the thesis.