Probabilistic methods and apparatus to determine the state of a media device
First Claim
1. A method to determine a state of a media device, the method comprising:
- processing a first output signal from a first sensor measuring a first property of the media device to generate a first parameter value;
processing a second output signal from a second sensor measuring a second property of the media device to generate a second parameter value;
generating a first state probability by combining a first conditional probability that the first parameter value corresponds to the media device being in a first state and a second conditional probability that the second parameter value corresponds to the media device being in the first state;
generating a second state probability by combining a third conditional probability that the first parameter value corresponds to the media device being in a second state and a fourth conditional probability that the second parameter value corresponds to the media device being in the second state; and
determining a detected state of the media device by selecting a greater of the first state probability or the second state probability.
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Abstract
Probabilistic methods and apparatus to determine the state of a media device are described. An example method to determine the state of a media device includes processing a first output signal from a first sensor measuring a first property of the media device to generate a first parameter value and processing a second output signal from a second sensor measuring a second property of the media device to generate a second parameter value. Next, the example method includes combining first conditional probabilities of the first parameter value and the second parameter value to determine a first state probability for the first state of the media device and combining second conditional probabilities of the first parameter value and the second parameter value to determine a second state probability for the second state of the media device. Then, determining the state of the media device by selecting the greater of the first state probability or the second state probability.
185 Citations
22 Claims
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1. A method to determine a state of a media device, the method comprising:
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processing a first output signal from a first sensor measuring a first property of the media device to generate a first parameter value; processing a second output signal from a second sensor measuring a second property of the media device to generate a second parameter value; generating a first state probability by combining a first conditional probability that the first parameter value corresponds to the media device being in a first state and a second conditional probability that the second parameter value corresponds to the media device being in the first state; generating a second state probability by combining a third conditional probability that the first parameter value corresponds to the media device being in a second state and a fourth conditional probability that the second parameter value corresponds to the media device being in the second state; and determining a detected state of the media device by selecting a greater of the first state probability or the second state probability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus to determine the state of a media device, the apparatus comprising:
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a parameter generator to process a first signal from a first sensor measuring a first property of the media device to generate a first parameter value and to process a second signal from a second sensor measuring a second property of the media device to generate a second parameter value; and a classifier to; generate a first state probability by combining a first conditional probability that the first parameter value corresponds to the media device being in a first state and a second conditional probability that the second parameter value corresponds to the media device being in the first state; generate a second state probability by combining a third conditional probability that the first parameter value corresponds to the media device being in a second state and a second conditional probability that the second parameter value corresponds to the media device being in the second state; and determine a detected state of the media device by selecting a greater of the first state probability or the second state probability. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A tangible machine accessible storage device or disc comprising instructions that, when executed, cause a machine to at least:
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process a first output signal from a first sensor measuring a first property of the media device to generate a first parameter value; process a second output signal from a second sensor measuring a second property of the media device to generate a second parameter value; generate a first state probability by combining a first conditional probability that the first parameter value corresponds to the media device being in a first state and a second conditional probability that the second parameter value corresponds to the media device being in the first state; generate a second state probability by combining a third conditional probability that the first parameter value corresponds to the media device being in a second state and a fourth conditional probability that the second parameter value corresponds to the media device being in the second state; and determine a detected state of the media device by selecting a greater of the first state probability or the second state probability. - View Dependent Claims (21, 22)
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Specification