Glottal Flow Derivative
A technique for producing waveforms in articulatory synthesis.
Gist is: Find some mathematical way to approximate the flow of air in the glottis. The derivative of this curve is the waveform suitable for a time domain audio signal.
Papers I am looking at that deal with this:
[gasrhedw]: Hui-Ling Lu Dissertation
[gfprlahl]: glottal source modelling for singing (Lu, Smith)
[glhfjiwq]: Fant 1985, Four Parameter Model (aka LF Model)
[greswfhd]: Fant 1995, AKA the Transformed LF Model
[goqfwkij]: Lin Dissertation on Articulatory Synthesis (1991), Lu references this paper so I grabbed it (it also has many other things).
[gpoiesop]: Strik, 1998. This paper (allegedly) approaches ways to automatically fit an LF model, given the timing parameters. Lu's Glottal Source Modelling casually mentions this paper in one section.
[grwuwllf]: Velhuis, 1998. Another alternative to the LF model, Called the Rosenberg++ Model, built on the Rosenberg Model (1971). Supposedly more efficient than LF? And hopefully easier to compute (not sure yet).
[guiupqfw]: Mushtaq and Khalid (2010). This paper outlines a physically based glottal flow model, which is different than the Fant analytical models. This seems to use a mass-and-spring model, which Perry Cook's Dissertation seems to touch on all the way in 1991. However, this one claims to be quite efficient compared to other techniques.