Learning algorithm to detect human presence in indoor environments from acoustic signals
First Claim
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1. A method for detecting presence of one or more individual human in an indoor environment comprising:
- refining at least one of models of a plurality of models based at least in part on a determination that a first individual human is present in the indoor environment, so that the models over time become more accurate and more specific to respective characteristics of acoustic features of each of a set of individual human occupants and to the particular indoor environment, wherein refining the models includes;
starting with generic models to detect, from acoustic features, the presence and absence of each of one or more individual human occupants in the indoor environment; and
during high-detection probability of presence of a particular individual human occupant, modifying a human-presence model for that particular individual human occupant so that relevant acoustic features specific to the particular individual human occupant and the indoor environment are emphasized, thereby improving accuracy of the human-presence model for that particular individual human occupant over time.
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Abstract
A system is described that constantly learns the sound characteristics of an indoor environment to detect the presence or absence of humans within that environment. A detection model is constructed and a decision feedback approach is used to constantly learn and update the statistics of the detection features and sound events that are unique to the environment in question. The learning process may not only rely on acoustic signal, but may also make use of signals derived from other sensors such as range sensor, motion sensors, pressure sensors, and video sensors.
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Citations
20 Claims
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1. A method for detecting presence of one or more individual human in an indoor environment comprising:
refining at least one of models of a plurality of models based at least in part on a determination that a first individual human is present in the indoor environment, so that the models over time become more accurate and more specific to respective characteristics of acoustic features of each of a set of individual human occupants and to the particular indoor environment, wherein refining the models includes; starting with generic models to detect, from acoustic features, the presence and absence of each of one or more individual human occupants in the indoor environment; and during high-detection probability of presence of a particular individual human occupant, modifying a human-presence model for that particular individual human occupant so that relevant acoustic features specific to the particular individual human occupant and the indoor environment are emphasized, thereby improving accuracy of the human-presence model for that particular individual human occupant over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer implemented method comprising:
refining at least one model of a plurality of models based at least in part on a determination that a first individual is present in an indoor environment, the refining such that the models become more accurate in determining presence of specific individuals being present in the indoor environment, the refining of the model of the plurality of models including; during high-detection probability of presence of a particular individual occupant, modifying an occupant-presence model for that particular individual occupant so that relevant features specific to the particular individual occupant and the indoor environment are emphasized to improve accuracy of the occupant-presence model for that particular individual occupant. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification