Sleep signal conditioning device and method
AssigneeKoninklijke Philips N.V.
InventorERIK GOSUINUS PETRUS SCHUIJERS
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Abstract
A method and device are provided for conditioning a sleep signal from a sleep sensor for a sleep monitor. A sleep sensor is configured to sense a physiological signal, such as a cardiac or respiratory signal from a sleeping mammal, such as a human, e.g. an infant or a baby. If the mammal exhibits also (gross) body movement during his sleep, the sensor signal may be clipped. The method and device provide a conditioning of the sleep signal by providing an estimation of the sleep signal instead of the conditioned sleep signal itself when the sensor signal is clipping.
Claims15
Sleep signal conditioning device for a sleep monitor, the device comprising:
- a first processing unit for providing a first parameter indicative of the magnitude of a first sensor signal from a first sleep sensor sensing a physiological signal from a sleeping mammal;
- a second processing unit for providing a second parameter indicative of the magnitude of a second sensor signal from a second sleep sensor sensing a physiological signal from the sleeping mammal, wherein the first sensor signal is different from the second sensor signal;
- a clipping detector for detecting when the first sensor signal is clipping;
- a divider for calculating a ratio based on dividing the first parameter by the second parameter when the first sensor signal is not clipping;
- a multiplier for generating an estimated first sensor signal based on multiplying a second output signal based on the second sensor signal by the ratio;
- and
- a switch for providing a first output sleep signal based on the estimated first sensor signal when detecting that the first sensor signal is clipping and a first output signal based on the first sensor signal when detecting that the first sensor signal is not clipping.
Sleep signal conditioning method for a sleep monitor, comprising the steps of:
- processing a first sensor signal for providing a first parameter indicative of the magnitude of the first sensor signal from a first sleep sensor sensing a physiological signal from a sleeping mammal;
- processing a second sensor signal for providing a second parameter indicative of the magnitude of the second sensor signal from a second sleep sensor sensing a physiological signal from the sleeping mammal, wherein the first sensor signal is different from the second sensor signal;
- detecting when the first sensor signal is clipping;
- calculating a ratio based on dividing the first parameter by the second parameter when the first sensor signal is not clipping;
- generating an estimated first sensor signal based on multiplying a second output signal based on the second sensor signal by the ratio;
- and
- a switch for providing a first output sleep signal based on the estimated first sensor signal when detecting that the first sensor signal is clipping and a first output signal based on the first sensor signal when detecting that the first sensor signal is not clipping;
- and
- providing a first output sleep signal based on the estimated first sensor signal when detecting that the first sensor signal is clipping and a first output signal based on the first sensor signal when detecting that the first sensor signal is not clipping.
Dependencies are inferred from the claim text.