Methods and systems to monitor a media device using a digital audio signal
First Claim
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1. A method to monitor a media device, comprising:
- attempting, with a processor, to detect a logical transition between two sequential bits in a sequence of bits of a digital audio signal output by a port of the media device, the digital audio signal being encoded with Differential Manchester encoding; and
when the logical transition is detected, generating operating state data with the processor, the operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the logical transition is not detected, generating the operating state data with the processor, the operating state data including the first time and indicating that the media device was in an off state at the first time.
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Abstract
Methods and systems are disclosed to monitor a media device. An example method includes attempting to detect a transition in a digital audio signal output by a port of the media device. If the transition is detected, the example method includes determining the media device is in an on state. If the transition is not detected, the example method includes determining the media device is in an off state.
20 Citations
27 Claims
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1. A method to monitor a media device, comprising:
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attempting, with a processor, to detect a logical transition between two sequential bits in a sequence of bits of a digital audio signal output by a port of the media device, the digital audio signal being encoded with Differential Manchester encoding; and when the logical transition is detected, generating operating state data with the processor, the operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the logical transition is not detected, generating the operating state data with the processor, the operating state data including the first time and indicating that the media device was in an off state at the first time. - View Dependent Claims (2, 3, 4, 27)
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5. A method to monitor a media device, comprising:
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receiving, via a first port of an activity monitor connected in an audio path between a second port of the media device and a second device, a digital signal output by the second port of the media device, the digital signal being encoded with Differential Manchester encoding; attempting, with a processor in communication with the first port, to collect audio from the digital signal; and when the audio is collected, generating operating state data with the processor, the operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the audio is not collected, generating the operating state data with the processor, the operating state data including the first time and indicating that the media device was in an off state at the first time. - View Dependent Claims (6, 7, 8)
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9. A system to monitor a media device, comprising:
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a transition detector to; attempt to detect a logical transition between a first bit and a second bit in a sequence of bits of a digital audio signal output by a port of the media device, the digital audio signal being encoded with Differential Manchester encoding; and when the logical transition is detected, generate operating state data, the operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the logical transition is not detected, generate the operating state data, the operating state data including the first time and indicating that the media device was in an off state at the first time. - View Dependent Claims (10, 11, 12, 13)
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14. A system to monitor a media device comprising:
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a first port of an activity monitor connected in an audio path between a second port of the media device and a second device, the first port to receive a digital signal output by the second port of the media device, the digital signal being encoded with Differential Manchester encoding; an audio determiner to attempt to; collect audio from the digital signal; and when the audio is collected, generate operating state data, the operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the audio is not collected, generate the operating state data, the operating state data including the first time and indicating that the media device was in an off state at the first time. - View Dependent Claims (15, 16, 17, 18)
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19. A tangible computer-readable medium comprising instructions that, when executed, cause a processor to at least:
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attempt to detect a logical transition between two adjacent bits in a sequence of bits of a digital audio signal output by a port of a media device, the digital audio signal being encoded with Differential Manchester encoding; and when the logical transition is detected, generate operating state data, the operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the logical transition is not detected, generate the operating state data, the operating state data including the first time and indicating that the media device was in an off state at the first time. - View Dependent Claims (20, 21, 22)
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23. A tangible computer-readable medium comprising instructions that, when executed, cause a processor to at least:
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intercept, via a first port of an activity monitor connected in an audio path between a second port of a media device and a second device, a digital signal output by the second port of the media device, the digital signal being encoded with Differential Manchester encoding; attempt to collect audio from the digital signal; and when the audio is collected, generate operating state data including a first time and indicating that the media device was in an on state at the first time;
orwhen the audio is not collected, generate the operating state data including the first time and indicating that the media device was in an off state at the first time. - View Dependent Claims (24, 25, 26)
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Specification