MODIFIED MEL FILTER BANK STRUCTURE USING SPECTRAL CHARACTERISTICS FOR SOUND ANALYSIS

摘要

A system and method for detection of sound of interest amongst plurality of other dynamically varying sounds is disclosed. In one embodiment, a spectrum detector identifies dominant spectrum energy frequency by detecting the dominant spectrum energy band present in spectrum of sound energy. A modified mel filter bank is designed by revising spectral positioning of the first mel filter bank and the second mel filter bank according to the identified dominant frequency. A feature extractor extracts the features from first mel filter bank, second mel filter bank and the modified mel filter bank which are further classified in order to detect the sound of interest.

主权项

1. A system for detection of a sound of interest amongst a plurality of other dynamically varying sounds, the system comprising:
a spectrum detector to identify a dominant spectrum energy frequency by detecting a dominant spectrum energy band present in a spectrum of sound energy of dynamically varying sounds; a first mel filter bank and a second mel filter bank that each comprises mel filters that filter a frequency band of the sound energy for detecting the sound of interest; a modified mel filter bank that includes a revised spectral positioning of the first mel filter bank and the second mel filter bank according to the identified dominant frequency for detection of the sound of interest; a feature extractor, coupled with the modified mel filter bank, to extract a plurality of spectral characteristics of the sound received from the modified filter bank; and a classifier to classify the extracted spectral characteristics of the sound according to the identified dominant frequency to detect the sound of interest.