5. The method of claim 4 , wherein the speech samples according to the at least one unknown speaker are classified by a speaker clustering technique, in particular, by Agglomerative Hierarchical Clustering.
5. The method of claim 4 , wherein the speech samples according to the at least one unknown speaker are classified by a speaker clustering technique, in particular, by Agglomerative Hierarchical Clustering. 6. The method of claim 5 , wherein the speaker clustering technique is based on a Gaussian Mixture Model and a Gaussian Mixture Model metric.