1. A signal processing method performed on a hardware processor for detecting an event in a multi-channel sensor-signal stream, comprising the steps of: inputting a section of said multi-channel sensor-signal stream to said hardware processor, said section including respective signal streams output by a plurality of sensors during a common time period, evaluating a pattern of coordination that exists between the sensor-signal streams during respective time intervals within said common time period with said hardware processor, producing, as a measure of the pattern of coordination between the sensor-signal streams during each time interval, parameters characterizing the relationships between different pairs of the sensor-signal streams during the respective time intervals, comparing the patterns of coordination evaluated for the respective time intervals in said common time period by using the parameters of said producing, to detect a series of consecutive time intervals during which there is little or no variation in the evaluated patterns of coordination, and identifying a beginning and an end of said series of consecutive time intervals as a start and an end point of the event in the multi-channel sensor-signal stream.