Patent ID: 9641892
Date: 2017-05-02
CPC Classifications: H04N

Claim:
1. A media source detection method comprising: determining, by executing an instruction with a processor, first trending coefficients for a first audio signal obtained from a first media source in communication with a media device, the first trending coefficients corresponding to a set of frequency bands, the determining of the first trending coefficients including: determining, by executing an instruction with the processor, second trending coefficients for a second audio signal obtained from monitoring media presented by the media device, the second trending coefficients corresponding to the set of frequency bands; selecting, by executing an instruction with the processor, a subset of the frequency bands for which the first trending coefficients and the second trending coefficients have matching directions, wherein (A) a first one of the first trending coefficients corresponding to a first one of the frequency bands and (B) a first one of the second trending coefficients corresponding to the first one of the frequency bands have matching directions if (1) the first one of the first trending coefficients is greater than one and the first one of the second trending coefficients is greater than one, or (2) the first one of the first trending coefficients is less than or equal to one and the first one of the second trending coefficients is less than or equal to one; and processing respective frequency band values of the first audio signal and respective frequency band values of the second audio signal for the subset of the frequency bands to determine whether the first media source provided the media presented by the media device.