Patent ID: 8237571

Claim:
An alarm method based on voice events, said method comprising: capturing a plurality of voice signals and sensing other sensed signals of an environment where a remote unit is located; integrating the captured voice signals and the other sensed signals into at least a voice event by using a voice event detection method; continuously detecting voice events through said voice event detection method and continuously recording the detected voice events; generating a behavior trajectory through a behavior trajectory building method after accumulating a sufficient number of the detected voice events; detecting a latest behavior through latest continuous voice events and comparing said latest behavior with a history of said behavior trajectory; and issuing a notification alarm message when an abnormal behavior is detected; wherein said behavior trajectory is generated by said behavior trajectory building method based on classifying qualified pre-selected strings of letters into a plurality of behavior types for building said behavior trajectory, said qualified pre-selected strings of letters being determined by naming each of the voice events with a letter to form letter sequences for the continuously detected voice events, finding identical strings in the letter sequences by comparing the letter sequences in a pair-wise manner, and qualifying each identical string of each type according to presence probability and length of the identical string.