Ambiguity reduction in speaker identification by the relaxation labeling process

A nonlinear probabilistic model of the relaxation labeling (RL) process is implemented in the speaker identi"cation task in order to disambiguate the labeling of the speech feature vectors. In this proposed algorithm, the deterministic labeling of the vector quantization (VQ)-based speaker identi"cation is relaxed by means of introducing initial probabilistic weights to the labeling process of the speech feature vectors. This process is then iteratively updated until no further signi"cant improvement is found. Experimental results on speaker identi"cation using a commercial speech corpus show that the relaxation labeling outperforms the conventional VQ method. ( 1999 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved.