The widely used maximum likelihood linear regression speaker adaptation procedure suffers from overtraining when used for rapid adaptation tasks in which the amount of adaptation data is severely limited. This is a well known difficulty associated with the expectation maximization algorithm. We use an information geometric analysis of the expectation maximization algorithm as an alternating min...

In this extended abstract of the plenary presentation we first motivate the need for modelling time-variant dynamics and give a short overview of the relevant literature. Next, some system theoretical concepts of time-variant systems that are used throughout the whole presentation are introduced. It includes the definition of the time-variant impulse response, the time-variant frequency respons...