Patent ID: 8548803

Claim:
A system configured to process a sound signal, the system comprising: one or more processors configured to execute computer program modules, the computer program modules comprising: a first set of one or more modules configured to transform individual time sample windows of the audio signal into the frequency-chirp domain, wherein the frequency-chirp domain representation of a given time sample window specifies a transform coefficient as a function of frequency and fractional chirp rate for the signal portion, wherein fractional chirp rate is chirp rate divided by frequency; a second set of one or more computer program modules configured to determine, from the transformed audio signal for the given time sample window, a pitch likelihood metric as a function of pitch and fractional chirp rate for the audio signal within the time sample window; and a third set of one or more computer program modules configured to determine, based on the pitch likelihood metric, estimated pitch and estimated fractional chirp rate for the individual time sample windows.