It is crucial for many methods of inverse filtering that the time domain information of the glottal source waveform is known, e.g. the location of the instant of glottal closure. It is often the case that this information is unknown and/or cannot be determined due to e.g. recording conditions which can corrupt the phase spectrum. In these scenarios, alternative strategies are required. This paper describes a method which, given the parameters of the glottal formant of the signal frame, can accurately parameterize the glottal shape source and vocal filter for a broad range of voice quality types and which is robust to the corruption of the phase spectrum.
Bibliographic reference. Cinnéide, Alan Ó / Dorran, David / Gainza, Mikel / Coyle, Eugene (2010): "Exploiting glottal formant parameters for glottal inverse filtering and parameterization", In INTERSPEECH-2010, 661-664.