Improvement in the reliability of segmentation of a signal, such as an ECG signal, is disclosed through the use of duration constraints. The signal is analysed using a hidden Markov model. The duration constraints specify minimum allowed durations for specific states of the model. The duration constraints can be incorporated either in the model itself or in a Viterbi algorithm used to compute the most probable state sequence given a conventional model. Also disclosed is the derivation of a confidence measure from the model which can be used to assess the quality and robustness of the segmentation and to identify any signals for which the segmentation is unreliable, for example due to the presence of noise or abnormality in the signal.
申请公布号
WO2005107587(A3)
申请公布日期
2006.04.27
申请号
WO2005GB01747
申请日期
2005.05.06
申请人
ISIS INNOVATION LIMITED;HUGHES, NICHOLAS;TARASSENKO, LIONEL;ROBERTS, STEPHEN
发明人
HUGHES, NICHOLAS;TARASSENKO, LIONEL;ROBERTS, STEPHEN