| 摘要 |
The invention relates to a device for the verification of time-dependent, user-specific signals which includesmeans for generating a set of feature vectors which serve to provide an approximative description of an input signal and are associated with selectable sampling intervals of the signal;means for preparing an HMM model for the signal;means for determining a first probability value which describes the probability of occurrence of the set of feature vectors, given the HMM model, anda threshold decider for comparing the first probability value with a threshold value and for deciding on the verification of the signal. In order to achieve an improved threshold value determination with an improved error rate for the verification without using additional original signals from a user whereby the device is initialized for this user, it is proposed to make the threshold value dependent on an automatically determined, person-dependent second probability value which is formed by training signals used for training the HMM model and by at least one additional validation signal which is not used for the training.
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