Patent ID: 9305317
Filing Date: 2016-04-05
CPC Classification: B60W,G06F,G06Q,H04N,H04R

Claim Text:
1. A method of analyzing audio signals for a drive monitoring system, the method comprising: recording an audio signal from a mobile device, the recorded audio signal including a background audio stream and a residual audio signal; communicating with an audio database to obtain a reference signal, wherein the communicating uses a location identifier to determine input sources for the audio database, and wherein the location identifier is chosen from the group consisting of a global positioning system (GPS), cellular network, Wifi signature, and internet protocol address; determining if the background audio stream in the recorded audio signal matches the reference signal; if a match between the background audio stream and the reference signal is confirmed, computing a time alignment between the background audio stream and the reference signal; aligning at least a portion of the recorded audio signal with the reference signal using the time alignment; canceling the background audio stream from the recorded audio signal, wherein the remaining portion of the recorded audio signal, after cancellation of the background audio stream, comprises the residual audio stream; and determining, with a computer processor, a driving behavior factor from the residual audio stream, wherein the driving behavior factor is chosen from the group consisting of: identification of a vehicle where the recorded audio signal was recorded, location of the mobile device within the vehicle, and speech recognition to identify the presence of passengers in the vehicle.