Level Set Algorithm (LSA) is one of the efficient tools of edge detection and contour extraction, which has been applied to radar, medical, and other images processing successfully. However, the procedure using LSA will cost a lot of time when applied to high-resolution images. This paper provides two novel approaches that can enhance the detection speed. In the first method, the moving step en...

and transformation of the vocal tract spectrum and the pitch contour. The first method (selective pre-emphasis) relies on band-pass filtering to perform vocal tract transformation. The second method (segmental pitch contour model) focuses on a more detailed modeling of pitch contours. Both methods are utilized in the design of a voice conversion algorithm based on codebook mapping. We compare t...