Patent ID: 7284255
Filing Date: 2007-10-16
Classification: H04H

Abstract:
1. A method for correlating a first packet of feature waveforms from an unknown source with a second packet of feature waveforms from a known broadcast audio source in order to associate a known broadcast audio source with the first packet of feature waveforms, comprising the steps of: (A) receiving free field audio signals using a microphone that is included in a portable data collection unit, wherein the free field audio signals are audible to a user proximate the portable data collection unit, and generating the first packet of feature waveforms in accordance with said free field audio signals received by the microphone; and determining, with at least one processor, at least first, second and third correlation values (cv (B) computing, with said at least one processor, a first weighting value in accordance with the features from the second packet associated with the first frequency band, a second weighting value in accordance with the features from the second packet associated with the second frequency band, and a third weighting value in accordance with the features from second packet associated with the third frequency band; (C) computing, with said at least one processor, a weighted Euclidean distance value (D wherein the first weighting value corresponds to a standard deviation (std wherein the weighted Euclidean distance value (D and (D) determining, with said at least one processor and in accordance with the weighted Euclidean distance value (D