BABY SLEEP MONITOR
First Claim
1. A sleep monitor for monitoring baby sleep, the sleep monitor comprisinga heartbeat feature detector and/or a respiration feature detector;
- a heartbeat feature and/or respiration feature based sleep state classifier with an input coupled to the heartbeat feature detector and/or the respiration feature detector;
at least one of a sound feature detector, a movement feature detector and an open eye detector;
a processing circuit configured to repeatedly execute a retraining process of the sleep state classifier during use of the sleep monitor, wherein the processing circuit is configured to detect time instants whereat the baby in the bed is in a wake state based on signals from the at least one of a sound feature detector, movement feature detector and the open eye detector, and to use the detected time instants to generate or select training examples for the retraining process.
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Accused Products
Abstract
A sleep monitor for monitoring baby sleep uses sleep state classification based on heartbeat feature respiration features. The sleep monitor automatically retrains the classification during use of the sleep monitor. Training examples for use in this training process are generated automatically by detecting time instants whereat the baby in the bed is in a wake state, based on signals from the at least one of a sound feature detector a movement feature detector (112) and an open eye detector (114). The retraining may comprise using time sequence from the end of detection of wake states to assign a class to heartbeat feature and/or respiration feature values during that time sequence for the training process. In an embodiment, the retraining comprises clustering detected heartbeat feature and/or respiration feature values detected outside the detected wake states.
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Citations
11 Claims
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1. A sleep monitor for monitoring baby sleep, the sleep monitor comprising
a heartbeat feature detector and/or a respiration feature detector; -
a heartbeat feature and/or respiration feature based sleep state classifier with an input coupled to the heartbeat feature detector and/or the respiration feature detector; at least one of a sound feature detector, a movement feature detector and an open eye detector; a processing circuit configured to repeatedly execute a retraining process of the sleep state classifier during use of the sleep monitor, wherein the processing circuit is configured to detect time instants whereat the baby in the bed is in a wake state based on signals from the at least one of a sound feature detector, movement feature detector and the open eye detector, and to use the detected time instants to generate or select training examples for the retraining process. - View Dependent Claims (2, 3, 4, 5)
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6. A method of automatically monitoring baby sleep, the method comprising
detecting heartbeat features, movement features and/or respiration features of a baby for successive measurement time intervals; -
automatically classifying sleep states of the baby associated with the successive measurement time intervals based on the heartbeat and/or respiration features of the measurement time intervals; automatically repeatedly retraining the classification criteria used for said classifying during use, said retraining comprising detecting time instants whereat the baby in the bed is in a wake state based on signals from at least one of a sound feature detector, a movement feature detector and an open eye detector, using the detected time instants to generate or select training examples for the retraining. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification