Patent ID: 6879968
Filing Date: 2005-04-12
Classification: G10L

Abstract:
1. A speaker verification apparatus, comprising: an identity claim input part to which an identity claim is input; a speaker selecting part for selecting voice information of a registered speaker corresponding to the identity claim input to the identity claim input part; a speaker storing part for storing voice information of speakers; a voice input part to which a voice is input; a voice analyzing part for analyzing the voice input to the voice input part; a speaker distance calculating part for calculating a verification distance between a feature parameter of the input voice and that of the voice of the registered speaker and the speaker distances between a feature parameter of the input voice and those of the voices of speakers other than the registered speaker that are stored in the speaker sorting part, based on the analysis results of the voice analyzing part and the voice information stored in the speaker storing part; a speaker judging part for determining whether or not the input voice matches the registered speaker corresponding to the input identity claim; a false acceptance error rate input part to which a false acceptance error rate is input as a threshold, the false acceptance error rate being predetermined by a system manager or a user or being adjustable depending on performance; and a distribution estimating part for obtaining a probability distribution of interspeaker distances based on the speaker distances calculated in the speaker distance calculating part; wherein the speaker judging part determines that the input voice is the voice of the registered person specified by the identity claim, in the case where the verification distance calculated in the speaker distance calculating part is included in a region defined by the input false acceptance error rate in the probability distribution of the interspeaker distances.