REPORT KRS97/IDIAP Investigation of a possible process identity between DRM and Linear Filtering Krstulović, Sacha EXTERNAL http://publications.idiap.ch/attachments/reports/1997/rr97-19.pdf PUBLIC Idiap-RR-19-1997 1997 IDIAP The classical analogy between linear filtering and acoustical filtering by tubes is applied in the non-classical case where the tubes are made of unequal-length sections (such as the DRM case). It is shown that the filtering process identity is substantially more complicated than in the case of equal-length sections. In particular, it prevents the use of the Levinson algorithm for inverting the filtering process and recovering the tube characteristics from sound alone.