Recording activity detection
    1.
    发明授权

    公开(公告)号:US11276292B2

    公开(公告)日:2022-03-15

    申请号:US16951421

    申请日:2020-11-18

    Abstract: Systems, methods, and techniques for detecting the recording activity of a sensor are described. A monitoring system includes a sensor that is configured to generate sensor data, as well as a failsafe circuit that is configured to monitor an electronic signal of the sensor and determine that the sensor is recording. The system can further include a control unit that receives indication from the failsafe circuit that the sensor is recording and, based on determining that the control unit did not request the sensor to record or that the control unit is not aware that the sensor is recording, the system outputs a signal, e.g. to an indicator light, indicating that the sensor is recording.

    Density function centric signal processing

    公开(公告)号:US10659095B2

    公开(公告)日:2020-05-19

    申请号:US15712768

    申请日:2017-09-22

    Abstract: A circuit for direct current (DC) offset estimation comprises a quantile value circuit and a signal processor. The quantile value circuit determines a plurality of quantile values of an input signal and includes a plurality of quantile filters. Each quantile filter includes a comparator, a level shifter, a monotonic transfer function component, and a latched integrator. The comparator compares the input signal and a quantile value. The level shifter shifts the output of the comparator. The monotonic transfer function component determines the magnitude of the shifted signal and provide a transfer function signal. The latched integrator suppresses transient characteristics of the transfer function signal and provide the quantile value. The signal processor is configured to calculate a weighted average of the quantile values to yield a DC offset estimate.

    Density function centric signal processing

    公开(公告)号:US09787341B2

    公开(公告)日:2017-10-10

    申请号:US14085898

    申请日:2013-11-21

    CPC classification number: H04B1/30 H04B2001/305

    Abstract: A circuit for direct current (DC) offset estimation comprises a quantile value circuit and a signal processor. The quantile value circuit determines a plurality of quantile values of an input signal and includes a plurality of quantile filters. Each quantile filter includes a comparator, a level shifter, a monotonic transfer function component, and a latched integrator. The comparator compares the input signal and a quantile value. The level shifter shifts the output of the comparator. The monotonic transfer function component determines the magnitude of the shifted signal and provide a transfer function signal. The latched integrator suppresses transient characteristics of the transfer function signal and provide the quantile value. The signal processor is configured to calculate a weighted average of the quantile values to yield a DC offset estimate.

    Density function centric signal processing

    公开(公告)号:US11184045B1

    公开(公告)日:2021-11-23

    申请号:US16853028

    申请日:2020-04-20

    Abstract: A circuit for direct current (DC) offset estimation comprises a quantile value circuit and a signal processor. The quantile value circuit determines a plurality of quantile values of an input signal and includes a plurality of quantile filters. Each quantile filter includes a comparator, a level shifter, a monotonic transfer function component, and a latched integrator. The comparator compares the input signal and a quantile value. The level shifter shifts the output of the comparator. The monotonic transfer function component determines the magnitude of the shifted signal and provide a transfer function signal. The latched integrator suppresses transient characteristics of the transfer function signal and provide the quantile value. The signal processor is configured to calculate a weighted average of the quantile values to yield a DC offset estimate.

    Light controller
    8.
    发明授权

    公开(公告)号:US09942965B1

    公开(公告)日:2018-04-10

    申请号:US15470296

    申请日:2017-03-27

    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for performing actions based on a determined relative composition of light. In some implementations, data representing an amount of ambient light detected within the portion of the property by a light sensor located at the portion of the property is initially obtained. Data indicating (i) a shape of an optical spectra for a natural light source, and (ii) a shape of an optical spectra for a non-natural light source is then obtained. A relative composition of the ambient light detected within the portion of the property is determined. An estimated amount of natural light within the portion of the property is then determined. In response, the amount of light output by one or more light sources located at the portion of the property is adjusted.

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