Systems and methods for variable filter adjustment by heart rate metric feedback

#Various embodiments described herein relate generally to signal processing systems and methods, and more particularly to physiological signal processing systems and methods.

#There is a growing market demand for personal health and environmental monitors, for example, for gauging overall health, fitness, metabolism, and vital status during exercise, athletic training, work, public safety activities, dieting, daily life activities, sickness and physical therapy. These personal health and environmental monitors process physiological signals that may be obtained from one or more physiological sensors, and are configured to extract one or more physiological metrics from physiological waveforms. Unfortunately, inaccurate physiological metric extraction can reduce the accuracy of health, fitness and/or vital status monitoring.

#It should be appreciated that this Summary is provided to introduce a selection of concepts in a simplified form, the concepts being further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of this disclosure, nor is it intended to limit the scope of the invention.

#FIGS. 1-4 are functional block diagrams of physiological signal processing systems and methods according to various embodiments described herein.

#FIG. 5 is a functional block diagram of a digital variable high pass filter according to various embodiments described herein.

#FIG. 6 is a functional block diagram of a digital variable low pass filter according to various embodiments described herein.

#The present invention will now be described more fully hereinafter with reference to the accompanying figures, in which various embodiments are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like numbers refer to like elements throughout. The sequence of operations (or steps) is not limited to the order presented in the figures and/or claims unless specifically indicated otherwise. Features described with respect to one figure or embodiment can be associated with another embodiment or figure although not specifically described or shown as such.

#It will be understood that, when a feature or element is referred to as being “connected”, “attached”, “coupled” or “responsive” to another feature or element, it can be directly connected, attached, coupled or responsive to the other feature or element or intervening features or elements may be present. In contrast, when a feature or element is referred to as being “directly connected”, “directly attached”, “directly coupled” or “directly responsive” to another feature or element, there are no intervening features or elements present.

#The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.