Systems 1:
Extracting periodic pieces

Mellinger'91

goal: polyphonic music transcription
· track harmonics incrementally
· increase `affinity' based on onset, f.m.
output: segmented spectrogram

Brown/Cooke'94

goal: separate voiced speech from interference
· find time-freq regions of uniform a.m.
· group whole regions by pitch, onset
output: t-f masks, resynthesis
A domain to assemble Bregman-style groups