Patent ID: 8386244

Claim:
An apparatus comprising: a computer having a storage device; means for obtaining a digitized quasi-periodic waveform; means for digitally filtering the digitized quasi-periodic waveform into a plurality of frequency-band components; means, using the computer, for forming a plurality of first data structures, each of the plurality of first data structures having a plurality of fractional-phase labels, each corresponding to one of a plurality of fractional phases that are each delimited by a plurality of fractional-phase time values, for each of a plurality of local cycles of a respective one of the plurality of frequency-band components; means, using the computer, for generating a plurality of states, each state including one fractional-phase label from each of the first data structures, wherein the fractional-phase labels of each state are coactive for that state, and wherein the plurality of states have a sequence; and means for storing the states and the sequence in the storage device accessible by the computer.