A COMPARISON OF ANALYSIS AND RESYNTHESIS METHODS FOR DIRECTIONAL SEGMENTATION OF STEREO AUDIO
Jeremy J. Wells · 2011
A comparison of analysis and resynthesis methods fo r use with a system for dividing time-coincident stereo audio si gnals into directional segments is presented. The purpose of suc h a system is to give greater flexibility in the presentation of spatial information when two-channel audio is reproduced. Example applications include up-mixing and transforming panning fr om amplitude to time-delay based. Included in the methods a re the dualtree complex wavelet transform and wavelet packet decomposition with best basis search. The directional segmen tation system and the analysis and resynthesis methods are briefl y described, with reference to the relevant underlying theory, f igures of merit are presented for each method applied to three ster eo mixtures of contrasting material and the subjective quality of the output (with links to all audio examples) is discussed.