Methods and apparatus for automatic TV on/off detection
First Claim
1. A method to determine a power state of an information presentation device, the method comprising:
- measuring power drawn by the information presentation device during a calibration period to generate a log of measurement values;
determining, by executing an instruction with a processor, a first count indicating a number of times a first one of the measurement values was detected during the calibration period, and a second count indicating a number of times a second one of the measurement values was detected during the calibration period;
identifying, by executing an instruction with the processor, first and second most frequently logged measurement values based on the first and second counts after expiration of the calibration period, the first count of the first most frequently logged measurement value is greater than the second count of the second most frequently logged measurement value;
determining, by executing an instruction with the processor, the second most frequently logged measurement value to be a first power state measurement;
calculating, by executing an instruction with the processor, a first threshold as a product of the first power state measurement and a first multiplier; and
determining whether the presentation device is in an ON state based on a comparison of (a) measured power drawn by the information presentation device after the calibration period to (b) the first threshold.
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Accused Products
Abstract
Methods and apparatus to determine a power state of an information presentation device. The method includes measuring power drawn by the information presentation device during a calibration period to generate a log of measurement values, determining, by executing an instruction with a processor, respective counts indicating respective numbers of times respective different ones of the measurement values were detected during the calibration period, and determining, by executing an instruction with the processor, a first threshold based on at least one of the counts. The method also includes determining whether the presentation device is in an ON state based on a comparison of measured power drawn by the information presentation device after the calibration period to the first threshold.
283 Citations
19 Claims
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1. A method to determine a power state of an information presentation device, the method comprising:
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measuring power drawn by the information presentation device during a calibration period to generate a log of measurement values; determining, by executing an instruction with a processor, a first count indicating a number of times a first one of the measurement values was detected during the calibration period, and a second count indicating a number of times a second one of the measurement values was detected during the calibration period; identifying, by executing an instruction with the processor, first and second most frequently logged measurement values based on the first and second counts after expiration of the calibration period, the first count of the first most frequently logged measurement value is greater than the second count of the second most frequently logged measurement value; determining, by executing an instruction with the processor, the second most frequently logged measurement value to be a first power state measurement; calculating, by executing an instruction with the processor, a first threshold as a product of the first power state measurement and a first multiplier; and determining whether the presentation device is in an ON state based on a comparison of (a) measured power drawn by the information presentation device after the calibration period to (b) the first threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus to determine a power state of an information presentation device, the apparatus comprising:
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a sensor to measure power drawn by the information presentation device during a calibration period to generate a log of measurement values; a chart generator to determine a first count indicating a number of times a first one of the measurement values was detected during the calibration period, and a second count indicating a number of times a second one of the measurement values was detected during the calibration period; a chart analyzer to identify first and second most frequently logged measurement values based on the first and second counts after expiration of the calibration period; a power level calculator to determine the lesser valued measurement of the first and second identified measurements as a first power state measurement; a threshold calculator to calculate a first threshold as a product of the first power state measurement and a first multiplier; and a state detector to determine whether the presentation device is in an ON state based on a comparison of (a) measured power drawn by the information presentation device after the calibration period to (b) the first threshold. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A non-transitory computer readable storage medium comprising instructions that, when executed, cause a machine to at least:
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measure power drawn by the information presentation device during a calibration period to generate a log of measurement values; determine a first count indicating a number of times a first one of the measurement values was detected during the calibration period, and a second count indicating a number of times a second one of the measurement values was detected during the calibration period; identify first and second most frequently logged measurement values based on the first and second counts after expiration of the calibration period, the first count of the first most frequently logged measurement value is greater than the second count of the second most frequently logged measurement value; determine the second most frequently logged measurement value as a first power state measurement; calculate a first threshold as a product of the first power state measurement and a first multiplier; and determine whether the presentation device is in an ON state based on a comparison of (a) measured power drawn by the information presentation device after the calibration period to (b) the first threshold. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification