Methods and apparatus to detect spillover in an audience monitoring system
First Claim
1. A method to distinguish local media from spillover media content comprising:
- sampling a first audio signal from a first source received by a first microphone;
sampling a second audio signal received by a second microphone from the first source, wherein the second microphone is separated from the first microphone by a first distance;
calculating, with a processor, an origin direction of the first source based on a time difference between receipt of the first and second sampled audio signals;
determining, with the processor, whether the origin direction is within a threshold angle;
when the origin direction is within the threshold angle, retaining the media associated with the first source; and
when the origin direction exceeds the threshold angle, ignoring the media associated with the first source.
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Abstract
Methods and apparatus to detect spillover in an audience monitoring system are disclosed. An example method includes sampling a first audio signal from a first source received by a first microphone; sampling a second audio signal received by a second microphone from the first source, wherein the second microphone is separated from the first microphone by a first distance; calculating an origin direction of the first source based on a time difference between receipt of the first and second audio signals; when the origin direction is within a threshold angle, retaining the media associated with the first source; and when the origin direction exceeds the threshold angle, ignoring the media associated with the first source.
44 Citations
39 Claims
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1. A method to distinguish local media from spillover media content comprising:
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sampling a first audio signal from a first source received by a first microphone; sampling a second audio signal received by a second microphone from the first source, wherein the second microphone is separated from the first microphone by a first distance; calculating, with a processor, an origin direction of the first source based on a time difference between receipt of the first and second sampled audio signals; determining, with the processor, whether the origin direction is within a threshold angle; when the origin direction is within the threshold angle, retaining the media associated with the first source; and when the origin direction exceeds the threshold angle, ignoring the media associated with the first source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A tangible machine readable storage medium comprising instructions that, when executed, cause a machine to at least:
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sample a first audio signal from a first source received by a first microphone; sample a second audio signal received by a second microphone from the first source, wherein the second microphone is separated from the first microphone by a first distance; calculate an origin direction of the first source based on a time difference between receipt of the first and second sampled audio signals; determine whether the origin direction is within a threshold angle; when the origin direction is within the threshold angle, retain media associated with the first source; and when the origin direction exceeds the threshold angle, ignore the media associated with the first source. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus to distinguish local media from spillover media comprising:
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an audio sampler to sample a first audio signal from a first source received by a first microphone and sample a second audio signal received by a second microphone from the first source, wherein the second microphone is separated from the first microphone by a first distance; a direction detector to calculate an origin direction of the first source based on a time difference between receipt of the first and second sampled audio signals; and a filter to determine whether the origin direction is within a threshold angle, the filter to retain the media associated with the first source when the origin direction is within the threshold angle, the filter to ignore the media associated with the first source when the origin direction exceeds the threshold angle, at least one of the audio sampler, the direction detector, or the filter being implemented by hardware. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification