Methods, systems, and apparatus to calculate distance from audio sources
First Claim
1. A method to calculate a distance between a portable audio collecting device and a reference audio collecting device, comprising:
- receiving, at the reference audio collecting device, a first radio frequency (RF) signal from the portable audio collecting device to cause the reference audio collecting device to begin storing a plurality of reference data samples, each of the reference data samples associated with an indication of a respective time of acquisition;
receiving, at the reference audio collecting device, a second RF signal containing a plurality of embedded portable data samples of ambient audio collected at the portable audio collecting device, the embedded portable data samples being offset from the reference data samples by a dwell period, the dwell period to prevent collection and storage of portable data samples at the portable audio collecting device that are lacking an overlap parity with the reference data samples collected at the reference audio collecting device, wherein each of the portable data samples is associated with an indication of a respective time of acquisition;
selecting a set of the portable data samples having a highest relative correlation value to a set of reference data samples;
subtracting the indication of times of respective pairs of the selected sets of samples to form a difference value; and
calculating a distance between the portable audio device and the reference audio collecting device based on the difference value.
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Accused Products
Abstract
Systems, methods, articles of manufacture and apparatus are disclosed to calculate distance from audio sources. An example method disclosed herein includes receiving, at the reference audio collecting device, a first radio frequency (RF) signal from the portable audio collecting device, in response to receiving the RF signal, storing ambient audio to a memory as reference data samples, each of the reference data samples associated with an indication of a respective time of acquisition, and receiving a second RF signal containing portable data samples of the ambient audio, each of the portable data samples associated with an indication of a respective time of acquisition. The example method also includes computing a correlation value between a set of the portable data samples and a plurality of the reference data samples, selecting a set of samples having a highest correlation value, subtracting the indication of times of the pair of samples to form a difference value, and calculating a distance between the portable audio device and the reference audio collecting device based on the difference value.
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Citations
25 Claims
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1. A method to calculate a distance between a portable audio collecting device and a reference audio collecting device, comprising:
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receiving, at the reference audio collecting device, a first radio frequency (RF) signal from the portable audio collecting device to cause the reference audio collecting device to begin storing a plurality of reference data samples, each of the reference data samples associated with an indication of a respective time of acquisition; receiving, at the reference audio collecting device, a second RF signal containing a plurality of embedded portable data samples of ambient audio collected at the portable audio collecting device, the embedded portable data samples being offset from the reference data samples by a dwell period, the dwell period to prevent collection and storage of portable data samples at the portable audio collecting device that are lacking an overlap parity with the reference data samples collected at the reference audio collecting device, wherein each of the portable data samples is associated with an indication of a respective time of acquisition; selecting a set of the portable data samples having a highest relative correlation value to a set of reference data samples; subtracting the indication of times of respective pairs of the selected sets of samples to form a difference value; and calculating a distance between the portable audio device and the reference audio collecting device based on the difference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus to calculate a distance between a portable audio collecting device and a reference audio collecting device, comprising:
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a radio frequency (RF) interface to receive an initialization signal from the portable audio collecting device to cause the reference audio collecting device to begin storing a plurality of data samples; a processor to associate each of the reference data samples with an indication of a respective time of acquisition; and a correlation engine configured to; identify a highest relative correlation value associated with portable data samples associated with ambient audio and a set of the reference data samples, the portable data samples offset from the set of reference data samples by a dwell period configured to prevent collection and storage of portable data samples that are lacking an overlap parity with the set of reference data samples collected at the reference audio collecting device, calculate a difference value between an indication of a time of acquisition of the portable data samples and the set of the reference data samples, and calculate a distance value based on the difference value. - View Dependent Claims (12, 13, 14)
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15. A method to collect ambient audio in a monitored area, comprising:
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transmitting a radio frequency (RF) initialization signal from a portable audio collecting device to cause a reference audio collecting device to begin storing reference data samples associated with ambient audio in the monitored area; initiating a dwell period on the portable audio collecting device in response to transmitting the RF initialization signal configured to reduce a number of ambient audio data samples collected by the portable audio collecting device that are lacking an overlap parity with the reference data samples stored by the reference audio collecting device; collecting ambient audio in the monitored area as portable data samples for a portable collection duration in response to an expiration of the dwell period; and transmitting, to the reference audio collecting device, the portable data samples after the portable collection duration via an RF signal, facilitating correlation calculations between the reference data samples and the portable data samples. - View Dependent Claims (16, 17, 18, 19)
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20. A machine accessible storage device or storage disk having instructions stored thereon that, when executed, cause a machine to, at least:
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receive, at a reference audio collecting device, a first radio frequency (RF) signal from a portable audio collecting device to cause the reference audio collecting device to begin storing a plurality of reference data samples, each of the reference data samples associated with an indication of a respective time of acquisition; receive a second RF signal containing a plurality of embedded portable data samples of ambient audio collected at the portable audio collecting device, the embedded portable data samples being offset from the reference data samples by a dwell period, the dwell period configured to prevent collection and storage of portable data samples at the portable audio collecting device that are lacking an overlap parity with the reference data samples collected at the reference audio collecting device, wherein each of the portable data samples associated with an indication of a respective time of acquisition; select a set of the portable data samples having a highest relative correlation value to a set of reference data samples; subtract the indication of times of respective pairs of the selected sets of samples to form a difference value; and calculate a distance between the portable audio device and the reference audio collecting device based on the difference value. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification