System and method for robust estimation and tracking the fundamental frequency of pseudo periodic signals in the presence of noise

摘要

Method and system for tracking fundamental frequencies of pseudo-periodic signals in the presence of noise that include receiving a time-frequency representation of signals measured in a predefined environment; estimating and tracking a fundamental frequency of a respective pseudo-periodic signal at each time frame of the time-frequency representation by tracking detections of harmonious frequencies in the time-frequency representation over time; and outputting each respective estimated fundamental frequency associated with the pseudo-periodic signal of each respective time frame.

主权项

1. A computer implemented method of tracking fundamental frequencies of pseudo-periodic signals in the presence of noise, said method comprising:
receiving a time-frequency representation of signals measured in a predefined environment; estimating and tracking a fundamental frequency of a respective pseudo-periodic signal at each time frame of said time-frequency representation by tracking detections of harmonious frequencies in said time-frequency representation over time; and outputting said respective estimated fundamental frequency associated with said pseudo-periodic signal of each said respective time frame; wherein a respective said fundamental frequency is tracked, recorded in a memory unit, and identified in each time frame of said time-frequency representation; wherein said estimation and tracking of the fundamental frequency of each respective time frame comprises: identifying harmonious frequencies in each time frame of said time-frequency representation; checking correlations between each identified harmonious frequency and harmonious frequencies identified in preceding time frames; allocating a new tracker to each respective identified uncorrelated harmonious frequency; updating information relating to each tracker including number of identified correlations associated with each said tracker; and determining said fundamental frequency of the respective time frame by selecting one of said trackers, according to predefined rules associated with accumulated information of said trackers, including the number of correlations associated with each said tracker.