Patent ID: 6349148
Filing Date: 2002-02-19
Classification: G10L

Abstract:
A device for the verification of time-dependent, user-specific signals which includesmeans for generating a set (Oâ€²) of feature vectors (otâ€²) 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 (&lgr;) for the signal; means for determining a first probability value which describes the probability of occurrence of the set (Oâ€²) of feature vectors (otâ€²), given the HMM model (&lgr;), and a threshold decider for comparing the first probability value with a threshold value (&tgr;) and for deciding on the verification of the signal; characterized in that the threshold value (&tgr;) is dependent on an automatically determined, person-dependent second probability value (lvalidate) which is formed by means of training signals used for training the HMM model (&lgr;) and at least one additional validation signal which is not used for the training.