Time-frequency signal decompositions for audio and speech processing
Karthikeyan Umapathy, Sridhar Krishnan · Canadian acoustics · 2005
A unified adaptive TF decomposition based methodology for processing audio and speech signals was presented. The proposed methodology uses an adaptive TF transform (ATFT) based on the matching pursuit (MP) algorithm with Gaussian TF function. MP when used with a dictionary of TF functions yields an adaptive time-frequency transformation. A novel time-width vs frequency band mapping (TWFB) is also developed which demonstrates high potential to form as a versatile parametric visualization/pattern recognition tool.