System and method of camera selection utilizing IR and RF signaling

Abstract

A method for selecting a video stream including receiving at a coordination hub (110) transmissions from a plurality of cameras, each transmission being associated with a camera of the plurality of cameras (120), determining whether the transmissions from the plurality of cameras (120) indicate detection of at least one of an optical detection of a patient-worn device (130) and a radio frequency (RF) detection of the patient-worn device (130), and, responsive to determining at least one transmission of the one or more transmissions indicates detection of at least one of an optical detection of a patient-worn device (130) and an RF detection of the patient-worn device (130), selecting a video feed from a camera of the plurality of cameras (120) from which at least one of the one or more transmissions indicating detection was received.

Description

SYSTEM AND METHOD OF CAMERA SELECTION UTILIZING IR AND RF SIGNALINGRelated Applications

[0001] This application claims priority under 35 U.S.C. § 119(e) of U.S. Provisional Patent Application Serial No. 63 / 728, 704(Attorney Docket No. 4735.01232) filed on December 6, 2024, and titled System and Method of Camera Selection Utilizing IR and RF Signaling. The content of this application is incorporated herein by reference.Field of the Invention

[0002] The present invention relates to systems and methods for selecting a camera utilizing patient-worn devices.Background

[0003] In healthcare facilities, assisted living centers, and other patient monitoring environments, video surveillance systems are commonly deployed to monitor patient safety and provide visual oversight of individuals who may be at risk of falls, medical emergencies, or other incidents. These monitoring systems typically employ multiple cameras positioned throughout the facility to provide comprehensive coverage of patient areas.

[0004] Existing video monitoring systems face challenges in automatically selecting the appropriate camera feed to display when a particular patient requires observation. Traditional systems often rely on manual camera selection by staff members who must identify which camera provides the best view of a specific patient's location. This manual process can be time-consuming and may result in delays when immediate patient monitoring is needed.

[0005] Current automated camera selection approaches typically depend on motion detection algorithms or predetermined camera switching sequences. Motion-based systems may trigger false activations from staff movement, equipment operation, or other non-patient activities within the camera's field of view. Sequential camera switching systems cycle through available cameras without regard to actual patient locations, potentially missing events or providing irrelevant video feeds.

[0006] Some existing systems attempt to address these limitations through the use of wearable tracking devices that communicate with monitoring infrastructure. However,these solutions often rely solely on radio frequency communication methods, which can be affected by signal interference, multipath propagation, and obstacles within the facility environment. Radio frequency signals may penetrate walls and other barriers, making it difficult to accurately determine which camera provides the best visual coverage of the patient's actual location.

[0007] The challenges faced by current patient monitoring systems include the inability to reliably correlate patient location information with optimal camera selection, difficulties in distinguishing between multiple patients in overlapping coverage areas, and limitations in providing real-time camera switching that accurately follows patient movement throughout the facility. These deficiencies can compromise the effectiveness of patient monitoring systems and may impact the quality of care provided to individuals under observation.Summary

[0008] FIG. 1 is a schematic view of a camera selection system according to an embodiment of the invention.

[0009] In one embodiment, a method for selecting a video stream is provided. In this embodiment, the method comprises receiving at a coordination hub one or more transmissions from a plurality of cameras, each transmission being associated with a camera of the plurality of cameras. The method further comprises determining whether the one or more transmissions from the plurality of cameras indicate detection of at least one of an optical detection of a patient-worn device and a radio frequency detection of the patient-worn device. The method also comprises, responsive to determining at least one transmission of the one or more transmissions indicates detection of at least one of an optical detection of the patient-worn device and an RF detection of the patient-worn device, selecting a video feed from a camera of the plurality of cameras from which at least one of the one or more transmissions indicating detection was received.

[0010] In other embodiments, the method may further comprise determining a list of optical-detecting cameras of the plurality of cameras providing a transmission indicating an optical detection of the patient-worn device and determining a list of RF-detecting cameras of the plurality of cameras providing a transmission indicating an RF detection of the patient-worn device, wherein selecting a video feed comprises selecting a video feed from a camera comprised by at least one of the list of optical-detecting cameras and the list of RF-detecting cameras. The method may include selecting a video feed from a camera comprised by at least one of the list of optical-detecting cameras and the list of RF-detecting cameras by weighting each camera comprised by the list of optical-detecting cameras by a first weighting value, weighting each camera comprised by the list of RF-detecting cameras by a second weighting value, and selecting a video feed of one or more cameras of the lists of optical-detecting cameras and RF-detecting cameras having the greatest weighted value. The first weighting value may be greater than a maximum value of the second weighting value, and the second weighting value may be a value within a range of values, the value being proportionate to a measurement of a received signal strength received along with the indication of RF detection of the patient- worn device associated with the RF-detecting camera, with the RF-detecting camera having the greatest received signal strength receiving a second weighting value that is a relatively greater value within the range of values and the RF-detecting camera having the lowest received signal strength receiving a second weighting value that is a relatively lower value within the range of values. The method may further comprise determining a list of optical-detecting cameras of the plurality of cameras providing a transmission indicating an optical detection of the patient-worn device, upon determining the list of optical-detecting cameras comprises one camera, selecting the video stream from the optical-detecting camera, upon determining the list of optical-detecting cameras comprises zero cameras, determining a list of RF-detecting cameras of the plurality of cameras providing a transmission indicating an RF detection of the patient-worn device, upon determining the list of RF-detecting cameras comprises zero cameras, selecting no video streams of the plurality of cameras, and upon determining the list of RF-detecting cameras comprises one or more cameras, sorting the list of RF-detecting cameras by a measurement of the received signal strength received along with the indication of RF detection of the patient-worn device associated with the RF-detecting camera and selecting the video stream of the RF-detecting camera having the greatest received signal strength, upon determining the list of optical-detecting cameras is more than one, determining the list of RF-detecting cameras, upon determining the list of RF-detecting cameras comprises one camera, selecting the video feed of the RF-detecting camera, upon determining the list of RF-detecting cameras comprises more than one camera, comparing a camera identifier received along with each indication of optical detection of the patient-worn device to a camera identifier received along with each indication of RF detection of the patient-worn device, determining a list of dual-detecting cameras for which the camera identifier was received in both an indication of optical detection of the patient-worn device and an indication of RF detection of the patient-worn device, upon determining the list of dual-detecting cameras comprises one or more cameras, sorting the list of dual-detecting cameras by the measurement of the received signal strengthreceived along with the indication of RF detection of the patient-worn device associated with the dual-detecting camera and selecting the video stream of the camera having the greatest measured signal strength, and upon determining the list of dual-detecting cameras comprises zero cameras, sorting the list optical-detecting cameras by the camera identifiers received along with the indication of optical detection of the patient- worn device and selecting the video stream of the optical-detecting camera with the lowest value camera identifier, wherein the video stream that is selected is at least one of displayed on a display device, transmitted to a remote computerized device, and recorded on a computer-readable medium. The one or more transmissions may be evaluated to determine whether a time threshold has elapsed since at least one of a transmission of the transmission of the one or more transmissions or a receipt of the transmission of the one or more transmissions. The steps may be performed in a period of time that is less than or equal to a transmission cycle duration of at least one of an optical transmission device comprised by the patient-worn device or an RF transmission device comprised by the patient-worn device. The method may further comprise detecting at a detecting camera of the plurality of cameras at least one of an optical transmission transmitted from an optical signal device comprised by the patient-worn device or an RF signal transmitted from an RF transmission device comprised by the patient-worn device, and transmitting from the detecting camera of the plurality of cameras to the coordination hub a transmission indicating detection of the at least one an optical signal or an RF signal. When a received RF transmission is detected, the method may further comprise measuring at the detecting camera a signal intensity of the received RF transmission, generating at the detecting camera an RSSI value responsive to the signal intensity, and transmitting from the detecting camera the RSSI value along with the transmission indicating detection of the received RF transmission. The optical transmission may be detected within an infrared wavelength range within a range from 700 nanometers to 1 millimeter. The RF transmission may conform to an IEEE 802 wireless transmission standard. The method may further comprise transmitting from the optical transmission device comprised by the patient-worn device an optical signal comprising an optical unique identifier associated with the patient-worn device and transmitting from the RF transmission device comprised by the patient-worn device an RF signal comprising an RF unique identifier associated with the patient-worn device.

[0011] In another embodiment, a system for selecting a video stream is provided. In this embodiment, the system comprises a patient-worn device comprising an optical transmission device configured to emit an optical signal being electromagnetic radiationwithin an infrared spectrum of EMR having a wavelength within a range from 700 nanometers to 1 millimeter, a radio frequency transmission device configured to emit an RF signal being EMR within a radio frequency spectrum of EMR having a frequency within a frequency range from 30 megahertz to 300 gigahertz, and a controller configured to control operation of each of the optical transmission device and the RF transmission device. The system further comprises a plurality of cameras positioned within an observation area, each camera comprising an optical detection device operable to detect optical signals emitted by the optical transmission device of the patient-worn device within a field of view of the camera, an RF detection device operable to detect RF signals emitted by the RF transmission device of the patient-worn device, a video capture device operable to capture a video feed within the field of view of the camera, and a processor positioned in communication with of the optical detection device, RF detection device, and video capture device and operable to receive an indication from the optical detection device responsive to detecting an optical signal emitted by the optical transmission device, receive an indication from the RF detection device responsive to detecting an RF signal from the RF transmission device, receive the video feed from the video capture device, and generate a transmission comprising at least one of an indication of detecting an optical signal, detecting an RF signal, and the video feed, a communication device operable to transmit transmissions received from the processor. The system also comprises a coordination hub comprising a processor, a communication device operable to communicate with and receive transmission from the plurality of cameras and transmit a selected video feed to a remote computerized device, and a non-transitory computer- readable storage medium comprising executable software that causes the processor to select a video feed received from the plurality of cameras to be at least one of recorded to the non-transitory computer-readable medium and transmitted to a remote computerized device responsive to transmissions.

[0012] In other embodiments, the optical transmission device may comprise an elongate body member and a plurality of light-emitting diodes distributed along the elongate body member and configured to emit the optical signal, and the controller may be configured to operate the plurality of LEDs to emit the optical signal. The elongate body member may be configured to be worn on at least one of a head of the patient, a neck of the patient, a shoulder of the patient, and a waist of the patient. The elongate body member may be a circuit board. The optical signal may have a modulated pulse within a range from 20 kHz to 60 kHz. The RF transmission device may be configured to transmit an RF signal complying with an IEEE 802 standard. The optical detection deviceand the video capture device may be a single hardware device. Each of the optical transmission device and the RF transmission device may be configured to transmit an identifier in the respective optical signal and RF signal that is associated with the patient- worn device, and the controller may be operable to extract the identifier from the detected optical signal and the detected RF signal and transmit the identifier in the transmission indicating detection of optical signals and RF signals.Brief Description of the Drawings

[0013] FIG. 1 is a schematic view of a camera selection system according to an embodiment of the invention.

[0014] FIG. 2 is a top view of a patient-worn device according to an embodiment of the invention.

[0015] FIGS 3A-D are perspective views of a patient-worn device according to an embodiment of the invention being worn by a patient.

[0016] FIG. 4 is a representative view of a deployed camera selection system according to an embodiment of the invention.

[0017] FIG. 5 is a flowchart illustrating a method of camera selection according to an embodiment of the invention.Detailed Description of the Invention

[0018] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention 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. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.Those of ordinary skill in the art realize that the following descriptions of the embodiments of the present invention are illustrative and are not intended to be limiting in any way. Other embodiments of the present invention will readily suggest themselves to such skilled persons having the benefit of this disclosure. Like numbers refer to like elements throughout.

[0019] Although the following detailed description contains many specifics for the purposes of illustration, anyone of ordinary skill in the art will appreciate that many variations and alterations to the following details are within the scope of the invention.Accordingly, the following embodiments of the invention are set forth without any loss of generality to, and without imposing limitations upon, the invention.

[0020] In this detailed description of the present invention, a person skilled in the art should note that directional terms, such as “above,” “below,” “upper,” “lower,” and other like terms are used for the convenience of the reader in reference to the drawings. Also, a person skilled in the art should notice this description may contain other terminology to convey position, orientation, and direction without departing from the principles of the present invention.

[0021] Furthermore, in this detailed description, a person skilled in the art should note that quantitative qualifying terms such as “generally,” “substantially,” “mostly,” and other terms are used, in general, to mean that the referred to object, characteristic, or quality constitutes a majority of the subject of the reference. The meaning of any of these terms is dependent upon the context within which it is used, and the meaning may be expressly modified.

[0022] An embodiment of the invention, as shown and described by the various figures and accompanying text, provides a system for selecting a camera from a plurality of cameras to display a video feed of a patient wearing a patient-worn device by observing radio frequency (RF) and optical signals emitted from the patient-worn device. Referring now to FIG. 1 , a system 100 according to an embodiment of the invention is presented. The system 100 may comprise a coordination hub 110, a plurality of cameras 120, and a patient-worn device 130. The coordination hub 110 may be positioned in communication with the plurality of cameras 120. The coordination hub 110 may comprise a processor 112, a non-transitory computer readable medium 114 positioned in communication with the processor 112, and a communication device 116.

[0023] Each camera 120 of the plurality of cameras 120 may be configured to be positioned within an area to be monitored by the system 100 and operable to detect signals transmitted from the patient-worn device 130 and transmit indications of such detection to the coordination hub 110. Each camera 120 of the plurality of cameras 120 may comprise an RF detection device 122, an optical detection device 124, a video capture device 126, a processor 128, and a communication device 129. The processor 128 may be positioned in communication with each of the RF detection device 122, the optical detection device 124, the video capture device 126, and the communication device 129. The processor 128 may be configured to receive signals from each of the RF detection device 122 and the optical detection device 124 and send transmissions to the coordination hub 110 via the communication device 129. Additionally, the processor128 may be configured to receive a video feed from the video capture device 126 and transmit the video feed to the coordination hub 110 via the communication device 129. Accordingly, the communication device 129 may be configured to send and received transmissions to and from the coordination hub 110 using any known communication method, protocol, or standard as is known in the art, including wired and wireless communication standards including Ethernet, Universal Serial Bus (USB), IEEE 802. xx standards such as Wi-Fi, Bluetooth, Zigbee, Z-Wave, Matter, Threads, 3G, 4G, 5G, and the like. Moreover, the communication device 129 may be configured to communicate across a Personal Area Network, a Local Area Network, and / or a Wide Area Network, such as the Internet.

[0024] The RF detection device 122 may be configured to receive electromagnetic signals within the radio frequency spectrum (3 Hz to 3,000 GHz). In some embodiments, particular frequency ranges within the RF range, such as frequency ranges associated with one or more RF communication standards. Such standards include, but are not limited to, Bluetooth, such as Bluetooth LE, Zigbee, Z-Wave, Threads, Matter, and the like. In some embodiments, the frequency range may be within a range from 30 MHz to 300 GHz. Moreover, the RF detection device 122 may be configured to receive signals conforming to any of the aforementioned standards as well as any others known in the art. The RF detection device 122 may be configured to send a signal to the processor 128 responsive to detecting an RF signal transmitted from the patient-worn device 130. Information that may be at least one of included within the transmission or discernible from the transmission includes, but is not limited to, a device ID, a machine ID, received signal strength indicator (RSSI), time of flight (ToF), link quality indicator (LQI), and the like. Such information may be included in the signal sent to the processor 128 by the RF detection device 122.

[0025] The optical detection device 124 may be configured to detect electromagnetic signals within one or more of the infrared EM spectrum (wavelengths of 750 nm to 1 mm), the visible spectrum (wavelengths of 380 nm to 750 nm), and the ultraviolet spectrum (wavelengths of 10 nm to 380 nm). In some embodiments, the EMR detected by the optical detection device 124 may be within a range from 700 nm to 1 mm. The optical detection device 124 may be positioned to have a field of view 125 that significantly or completely overlaps a field of view of the video capture device 126. The optical detection device 124 may comprise one or more sensors configured to detect EM radiation within the wavelength ranges recited above, including, but not limited to, photodiodes, phototransistors, photovoltaics, photoresistors, and image sensors suchas charge-couple devices, active-pixel sensors, and the like. The optical detection device 124 may be operable to transmit a signal to the processor 128 responsive to detecting an optical signal within a target wavelength range of the optical detection device 124. Information that may be included in the signal may include, but is not limited to, a device ID, a machine ID, and the like. Such information may be encoded in the optical signal by modulation of the signal. In some embodiments, the optical signal may have a modulated pulse within a range from 20 kHz to 60 kHz, particularly 56 kHz, which may be achieved through pulse-width modulation, frequency modulation, or amplitude modulation techniques implemented by the optical transmission device. The modulated pulse range may be selected to provide reliable signal detection while avoiding interference with ambient lighting conditions. The optical signal may include an optical unique identifier that is encoded through modulation techniques such as pulsewidth modulation, frequency modulation, or amplitude modulation of the optical transmission. The optical unique identifier may be transmitted as a digital bit sequence that is modulated onto the optical carrier signal, allowing the optical detection device 124 to decode the identifier information from the detected optical signal.

[0026] The video capture device 126 may be configured to capture video of an area and transmit a feed of the captured video to the coordination hub 110. The area that may be captured by the video capture device 126 may define a field of view thereof. As mentioned above, the field of view 127 of the video capture device 126 may overlap substantially and / or completely with the field of view 125 of the optical detection device 124. The video capture device 126 may be any type of image sensors as is known in the art, including those recited hereinabove. Generally speaking, the line-of-sight for objects within the fields of view of the video capture device 126 and the optical detection device 124 may be substantially the same or identical, such that a patient wearing the patient-worn device 130 that is generating an optical signal that is detected by the optical detection device 124 may be shown in the video feed captured by the video capture device 126.

[0027] The patient-worn device 130 may be configured to emit RF and optical signals that can be detected by the cameras of the plurality of cameras 120. The patient-worn device 130 may comprise an optical transmission device 132, an RF transmission device 134, and a controller device 136. The optical transmission device 132 may be configured to emit light having a wavelength that is within a range that is detectable by the optical detection device 124 of the plurality of cameras 120. The optical transmission device 132 may be configured to emit light into an area generallysurrounding the patient-worn device 130. This may be accomplished by at least one of configuring the optical transmission device 132 to emit light having this type of distribution pattern from a single light source or by comprising a plurality of light-emitting devices each being configured to emit light into a region of the area surrounding the patient-worn device 130 so as to generally emit light into the entire surrounding area. Any type of device that may emit light as described herein may be used in the optical transmission device 132 including, but not limited to, light-emitting semiconductor devices, such as light-emitting diodes (LEDs), halogen devices, incandescent devices, neon devices, arc lighting devices, and the like. The optical transmission device 132 may be configured to encode an optical unique identifier into the emitted optical signal through modulation of the light output. The optical unique identifier may be implemented as a digital data sequence that modulates the optical signal using techniques such as on-off keying, where the presence or absence of light represents binary data bits, or through variations in light intensity, pulse duration, or pulse frequency to encode the identifier information.

[0028] The RF transmission device 134 may be configured to emit EMR within a frequency range configured to be detected by the RF detection device 122 of the plurality of cameras 120. Accordingly, the RF transmission device 134 may configured to send EMR conforming to wireless transmission standards as are known in the art, including, but not limited to, Bluetooth, such as Bluetooth LE, Zigbee, Z-Wave, Threads, Matter, and the like. In some embodiments, the RF transmission device 134 132 may be configured to transmit an RF signal having a frequency within a frequency range from 30 MHz to 300 GHz. Similar to the optical transmission device 132, the RF transmission device 134 may be configured to emit the RF signal into the area generally surrounding the patient-worn device 130. Such transmission may be accomplished by at least one of configured the RF transmission device 134 to transmit the RF transmission generally omnidirectionally from a single device or in other emission distributions from multiple devices. The RF signal transmitted by the RF transmission device 134 may include information such as a device ID, a machine ID, and the like.

[0029] The RF transmission device 134 and optical transmission device 132 may operate according to defined transmission cycle durations that establish the timing framework for the camera selection system. In some embodiments, the transmission cycle duration may be the time period between successive transmissions of signals from the patient-worn device 130. For example, the optical transmission device 132 may emit optical signals at regular intervals, such as every 100 milliseconds, 250milliseconds, 500 milliseconds, or 1 second, defining a transmission cycle duration for optical signals. Similarly, the RF transmission device 134 may transmit RF signals at regular intervals that may be the same as or different from the optical transmission cycle duration. The transmission cycle duration may be configurable based on power consumption requirements, detection accuracy needs, and system responsiveness considerations.

[0030] The measurement of transmission cycle duration may be accomplished through various timing mechanisms implemented within the controller device 136. In some embodiments, the controller device 136 may include a timing circuit, crystal oscillator, or other time-keeping component that provides precise timing references for controlling transmission intervals. The controller device 136 may maintain internal counters or timers that track elapsed time since the last transmission and trigger subsequent transmissions when the transmission cycle duration has elapsed. For instance, a 32.768 kHz crystal oscillator may provide timing accuracy sufficient for maintaining transmission cycle durations with millisecond precision. The controller device 136 may also implement software-based timing mechanisms using processor clock cycles or interrupt-driven timing routines to achieve the desired transmission cycle duration.

[0031] The controller device 136 may be configured to control the operation of each of the optical transmission device 132 and the RF transmission device 134. The controller device 136 may operate each of the optical transmission device 132 and the RF transmission device 134 to transmit signals as described above. The controller device 136 may be configured to encode an identifier to identify the patient-worn device 130 to the plurality of cameras 120 within the optical and RF transmissions transmitted by the optical transmission device 132 and the RF transmission device 134, respectively. In some embodiments, the controller device 136 may be configured to operate the optical transmission device 132 and the RF transmission device 134 to transmit the same identifier, and in other embodiments may be configured to operate the optical transmission device 132 and the RF transmission device 134 to transmit different identifiers that are each associated with the particular patient-worn device 130. Where multiple patient-worn devices are employed within a single area, e.g. a medical facility, an assistive care facility, a nursing facility, a rehabilitation facility, an industrial facility, or any other space within which the tracking of individuals is desired, the identifier(s) transmitted by each patient-worn device may be associated with that device, which may in turn be associated with the individual wearing the patient-worn device.Such identifier-individual pairings may be maintained in a database 140 by at least one of the coordination hub 110 and / or on a remote computerized device 150

[0032] The controller device 136 may implement transmission cycle synchronization mechanisms to coordinate the timing of optical and RF transmissions. In some embodiments, the optical and RF transmissions may be synchronized to occur simultaneously within the same transmission cycle, while in other embodiments they may be offset within the transmission cycle to reduce power consumption or interference. The controller device 136 may maintain a transmission schedule that defines when each type of signal should be transmitted within the transmission cycle duration. For example, if the transmission cycle duration is 500 milliseconds, the controller device 136 may be configured to transmit the optical signal at the beginning of the cycle (0 ms) and the RF signal at a predetermined offset (e.g., 50 ms) within the same cycle. This timing coordination may ensure that both signal types are available for detection by the cameras within a predictable timeframe.

[0033] The coordination hub 110 may be configured to implement a camera weighting system for selecting an optimal video feed from the plurality of cameras 120. In some embodiments, the coordination hub 110 may assign weighting values to cameras based on the type of signal detection achieved. Cameras that detect optical signals from the patient-worn device 130 may be assigned a first weighting value, while cameras that detect RF signals may be assigned a second weighting value. The first weighting value may be greater than the second weighting value, reflecting the higher reliability of optical detection for confirming the presence of a patient within the camera's field of view. In some cases, the first weighting value may be set to a value that exceeds the maximum possible value of the second weighting value, ensuring that optical detection takes precedence in camera selection decisions.

[0034] The second weighting value assigned to RF-detecting cameras may be variable and proportionate to signal quality measurements. In some embodiments, the second weighting value may be determined based on received signal strength indicator (RSSI) measurements, time of flight (ToF) measurements, link quality indicator (LQI) measurements, or other signal quality metrics. For example, an RF-detecting camera receiving a stronger RF signal may be assigned a higher second weighting value within a predetermined range, while an RF-detecting camera receiving a weaker RF signal may be assigned a lower second weighting value within the same range. This variable weighting approach may allow the system to distinguish between cameras that arecloser to or farther from the patient-worn device 130, thereby improving the accuracy of camera selection.

[0035] In some implementations, cameras that detect both optical and RF signals from the patient-worn device 130 may receive combined weighting values. Such dualdetecting cameras may be assigned the first weighting value for optical detection plus an additional weighting component based on the RF signal quality. Alternatively, dualdetecting cameras may be assigned a separate weighting category that prioritizes them over cameras detecting only one type of signal. The coordination hub 110 may maintain weighting tables or algorithms that define how weighting values are calculated and applied during the camera selection process. These weighting parameters may be configurable to accommodate different deployment environments or operational requirements.

[0036] As shown in FIG. 2, the patient-worn device 130 may comprise a substrate 138 having positioned thereon a circuit board 133 comprising the controller device 136 and the RF transmission device (not shown). The substrate 138 may comprise an elongate body member that is flexible and configured to conform to body contours when worn by a patient. The elongate body member may be formed from flexible materials such as flexible printed circuit board (PCB) material, silicone, thermoplastic elastomer, or other bendable substrates that can support electronic components while maintaining structural integrity during flexing and movement. The elongate body member may have a length ranging from approximately 10 centimeters to 100 centimeters and a width ranging from approximately 0.5 centimeters to 5 centimeters, providing sufficient surface area for component placement while remaining comfortable for patient wear. The substrate 138 may further comprise a plurality of optical transmission devices 132’, 132”, 132”’, 132’”' disposed thereon at different locations along the length of the substrate 138. The plurality of optical transmission devices 132’, 132”, 132’”, 132’”' may each be an LED device configured to emit light as described above. Each LED device of the plurality of optical transmission devices 132’, 132”, 132’”, 132’”' may be configured to emit light in a distribution pattern close to a hemisphere there above. By distributing four LEDs along the length of the substrate, when the patient-worn device 130 is being worn, the distribution patterns of light emitted from the plurality of optical transmission devices 132’, 132”, 132’”, 132’”' may result in light being emitted collectively therefrom in all directions from the patient-worn device 130. In the current embodiment, the RF transmission device may emit the RF signal generally omnidirectionally, hence a single device located on the circuit board 133 may result in the RF signal being emittedsufficiently in all directions into the area surrounding the patient-worn device 130. The patient-worn device 130 may further comprise a power source 135, which in the present embodiment is a battery. The power source 135 may provide electrical power to all the electrical components of the patient-worn device 130 including at least the controller device, the RF transmission device, and the plurality of optical transmission devices 132’, 132”, 132”’, 132’”'.

[0037] The patient-worn device 130 may be worn in a variety of ways by the patient. As shown in FIG. 3A, a first embodiment of the patient-worn device 130’ may include a componentry housing 137’ that may contain therewithin the electrical circuitry for the patient-worn device 130’ and may be connected to the substrate 138’ via one or more electrical connectors 139. The componentry housing 137’ may be configured to be worn by the patient in a comfortable manner and may be positioned at a distance from where the substrate 138’ is worn. The substrate 138’ may be configured to be worn about the head of the patient, the plurality of LEDs of the plurality of optical transmission devices 132 being distributed about the substrate 138’ as described above. In some embodiments, the RF transmission device may be located on the substrate 138’, while in other embodiments it may be comprised within the componentry housing 137’.

[0038] FIG. 3B shows another embodiment of the patient-worn device 130”. In this embodiment, the substrate 138” may be configured to be positioned adjacent a portion of the torso of the patient, for example, next to the side and / or back of the patient. In such embodiments, the substrate 138” may be configured to be twisted to facilitate greater distribution of light emitted from the optical transmission devices 132 comprised thereby.

[0039] FIG. 3C shows another embodiment of the patient-worn device 130’”. In this embodiment, the substrate 138’” may be configured as a shoulder strap configured to support the componentry housing 137’” and extend up the back and down the front of the torso of the patient, thereby increasing the distribution of light emitted by the optical transmission devices 132 comprised thereby.

[0040] FIG. 3D shows another embodiment of the patient-worn device 130””. In the present embodiment, the patient-worn device 130”” does not comprise a substrate, with the componentry housing 137”” comprising the optical transmission device 132. The optical transmission device 132 may be positioned on the componentry housing 137”” that generally faces outward, away from the patient, so the patient body does not impede the emission of light into the area surrounding the patient, thereby preventing the plurality of cameras 120 from detecting the light transmissions. Moreover, the opticaltransmission device 132 may comprise an optic (not shown) that may increase the distribution of light transmitted thereby.

[0041] Referring now to FIG. 4, an exemplary deployment of a system 400 according to an embodiment of the invention is presented. The system 400 comprises a coordination hub 410 that is positioned in communication with a plurality of cameras, the plurality of cameras comprising a first camera 421 positioned to have a first area within a first field of view 422, a second camera 423 positioned to have a second area within a second field of view 424, a third camera 425 positioned to have a second area within a third field of view 426, and a fourth camera 427 positioned to have a second area within a fourth field of view 428. The system 400 may comprise any number of cameras with any number of fields of view. The coordination hub 410 may be positioned at a location that may facilitate at least one of wired communication and wireless communication with the plurality of cameras. In some embodiments, a plurality of coordination hubs may be employed and configured to communicate and / or make decisions regarding video feed selection with each other, and which may establish a network, such as a mesh network, to further facilitate connection with the plurality of cameras.

[0042] A first patient 450 wearing a first patient-worn device 452 may be within the field of view 426 of the third camera 425. In the current position, both the optical transmission 454 and the RF transmission 456 of the first patient-worn device 452 may be detectable by the third camera 425. RF transmissions are generally able to penetrate common obstructions in physical spaces (walls, furniture, etc.) so long as such obstructions tend not to include metal or other RF-attenuating materials. In contrast, light in the optical transmission is more commonly obstructed by such obstructions, particularly in the visible and ultraviolet spectra, while light within the IR spectrum may be able to penetrate some obstructions. In the current instance, there are no obstacles between the first patient-worn device 452 and the third camera 425, and thus both the optical transmission 454 and the RF transmission 456 of the first patient-worn device 452 are readily detectable by the third camera 425. Accordingly, the third camera 425 may transmit an indication of such detection to the coordination hub 410, which may select the video feed of the third camera 425 to show the first patient 450.

[0043] A second patient 460 wearing a second patient-worn device 462 may be positioned within the field of view 424 of the second camera 423, although an obstruction 430 is between the second patient 460 and the second camera 423. Such an obstruction may be a wall, furniture, window, or the like. The obstruction may interfere with at least one of the optical transmission 464 and the RF transmission 466of the second patient-worn device 462. Such interference may reduce the detectability of the respective transmission to the second camera 423 or may render the transmission completely undetectable. However, if one of the optical transmission 464 and the RF transmission 466 of the second patient-worn device 462 are detectable by the second camera 423, then such detection may result in the coordination hub 410 selecting a video feed from the second camera 423 to show the second patient 460

[0044] A third patient 470 wearing a third patient-worn device 472 may be within a fields of view 422, 428 of both the first camera 421 and the fourth camera 427. Moreover one or both of the optical and RF transmissions 474, 476 of the third patient- worn device 472 may be detectable by each of the first and fourth cameras 421 , 427. Accordingly, when indications of such detections are sent to the coordination hub 410 from the first and fourth cameras 421 , 427, the coordination hub 410 will have to select from which camera to display the video feed to show the third patient 470. Such decision-making will be explained in greater detail below.

[0045] When multiple cameras detect signals from the same patient-worn device, the coordination hub 410 may apply weighting algorithms to determine the optimal camera selection. The weighting process may involve assigning numerical values to each detecting camera based on predetermined criteria. Optical-detecting cameras may receive higher base weighting values due to the line-of-sight nature of optical detection, which may provide greater confidence that the patient is actually visible within the camera's field of view. RF-detecting cameras may receive lower base weighting values, but these values may be modulated based on signal strength measurements to account for proximity and signal quality factors.

[0046] The coordination hub 410 may implement a multi-tier weighting system where cameras are first categorized by detection type, then ranked within each category by signal quality metrics. For instance, if multiple cameras detect RF signals from the third patient-worn device 472, the coordination hub 410 may calculate weighting values for each RF-detecting camera based on their respective RSSI measurements. The camera with the highest RSSI may receive the highest weighting value within the RF- detecting category, while cameras with progressively lower RSSI values may receive correspondingly lower weighting values. This graduated weighting approach may enable more nuanced camera selection decisions that account for both signal type and signal quality.

[0047] Referring now to FIG. 5, a flowchart illustrating a method 500 of selecting a video feed responsive to optical and RF transmissions from a patient-worn deviceaccording to an embodiment of the invention is presented. The method 500 may be performed by one or more coordination hubs as described above. The method 500 may start with receiving an input at 502. The input may comprise a patient-worn device identifier that the coordination hub may recognize. The received input may be determined to be one of a camera optical identifier at 504 or an RF identifier at 512. If it is a camera optical identifier that is received, the method 500 may proceed to step 506 with determining if the received camera optical identifier comprises an identifying the camera identifier / that is associated with a camera comprised by the plurality of cameras. If the camera identifier / was received at 506, the method 500 may continue at 508 with adding the camera from which the camera identifier / was received to a list of optical-detecting cameras associated with the patient-worn device. The method 500 continues at 510, both from 508 and from 506 if the camera identifier / is not comprised the camera optical identifier, with determining if a threshold length of time has expired. If not, then the method 500 may return to step 504. If yes, then the method 500 may continue to step 520.

[0048] The camera selection method 500 may incorporate weighting calculations at various decision points to optimize video feed selection. The coordination hub may maintain weighting parameters that define how different types of signal detection are valued relative to each other. In some embodiments, optical detection may be assigned a weighting multiplier that is significantly higher than RF detection weighting multipliers, ensuring that cameras with optical detection are preferentially selected when available. The specific weighting values may be configurable parameters stored in the coordination hub's memory and may be adjusted based on deployment requirements or environmental factors.

[0049] When the method 500 encounters scenarios where multiple cameras detect the same patient-worn device, weighting calculations may be performed to rank the available options. For RF-detecting cameras, the weighting calculation may incorporate RSSI values, where higher RSSI measurements result in higher weighting scores within the RF detection category. The weighting formula may be linear, logarithmic, or follow other mathematical relationships depending on the desired sensitivity to signal strength variations. Similarly, when both optical and RF detection are available from the same camera, the combined weighting may exceed the weighting of cameras with only singletype detection, reflecting the increased confidence in patient location provided by dual signal confirmation.

[0050] The timing implementation of the camera selection method 500 may involve specific mechanisms to ensure that all method steps are completed within the transmission cycle duration. In some embodiments, the method 500 may implement time-bounded execution where each step or group of steps is allocated a specific time budget within the overall transmission cycle duration. For instance, if the transmission cycle duration is 1 second, the method 500 may allocate 100 milliseconds for signal reception and processing (steps 502-518), 200 milliseconds for list generation and sorting operations (steps 520-544), and 100 milliseconds for final camera selection and video feed transmission (steps 546-556), with the remaining 600 milliseconds reserved for video feed processing and system overhead.

[0051] The measurement and monitoring of timing performance relative to transmission cycle duration may be accomplished through various timing measurement techniques implemented within the coordination hub 110. In some embodiments, the processor 112 may maintain timing statistics that track the execution time of camera selection method steps and compare these times to the transmission cycle duration. The coordination hub 110 may implement performance monitoring that measures the time elapsed from signal detection to camera selection completion, ensuring that this total time remains within acceptable limits relative to the transmission cycle duration. For example, timing measurements may be recorded using high-resolution system clocks or hardware timers that provide microsecond or nanosecond precision, allowing accurate assessment of whether method execution times meet the transmission cycle duration requirements. If timing violations are detected, the coordination hub 110 may implement adaptive algorithms that optimize processing priorities or adjust method parameters to maintain timing compliance.

[0052] If, at step 502, it is determined that an RF identifier that is received, the method may continue to step 512. When an RF identifier is received, an RSSI may also be at least one of received or determined from the received RF identifier. The method 500 may continue at 514 with determining if the received RF identifier comprises a camera identifier / that is associated with a camera of the plurality of cameras and if an RSSI r is included with or determinable from the RF identifier. If the camera identifier / and the RSSI rare identified at 514, the method 500 may continue at 516 with adding the camera having camera identifier / and RSSI to a list of RF-detecting cameras associated with the patient-word device. The RSSI rmay be associated with the entry for the camera identifier / on the list for selecting the video feed from a plurality of cameras that may be included on the list, as receiving multiple received RF identifiers ismore likely than receiving multiple optical identifiers due to the obstruction-penetrating nature of RF transmissions from the patient-worn device.

[0053] The method 500 continues at 518, both from 516 and from 514 if the camera identifier / is not comprised by the RF identifier, with determining if a threshold length of time has expired. If not, then the method 500 may return to step 512. If yes, then the method 500 may continue to step 520.

[0054] At step 520, the method 500 may continue with determining if the list of optical-detecting cameras has only one entry. If the list of optical-detecting cameras has only one entry, the method 500 may continue at 522 with selecting the camera listed on the list of optical-detecting cameras and begin transmitting the video feed from the optical-detecting camera to a remote computerized device.

[0055] If, at 520, there is not only one entry on the list of optical-detecting cameras, the method 500 may continue at 524 with determining if the list of optical-detecting cameras comprises more than one entry. If yes, then the method 500 may continue at 526 with determining if list of RF-detecting cameras comprises one entry. If yes, the method 500 may continue at 5528 with selecting the camera listed on the list of RF- detecting cameras and being transmitting the video feed from the RF-detecting camera to the remote computerized device.

[0056] If, at 524, it is determined the list of RF-detecting cameras does not have one entry, the method 500 may continue at 530 with determining if the list of RF-detecting cameras comprises more than one entry. If yes, the method 500 may continue at 532 with determining if each camera comprised on the list of RF-detecting cameras is also comprised on the list of optical-detecting cameras. For each camera, if the camera is on both lists, the method 500 may proceed to 534 where that camera may be added to a list of dual-detecting cameras along with RSSI r. If a camera is not on the list of optical- detecting cameras, it may not be added to the list of dual-detecting cameras. This may be done recursively until all cameras on the RF-receiving list are reviewed, at which point the method 500 may continue at 536 with determining if the list of dual-detecting cameras comprises one or more entries.

[0057] If, at 536, it is determined the list of dual-detecting cameras comprises one or more entries, the method 500 may continue at 538 where that list may be sorted by RSSI rvalues, where the camera with the highest RSSI rvalue is at the top of the list and the camera with the lowest RSSI rvalue is at the bottom of the list. The method 500 may continue at 540 with selecting the camera at the top of the sorted dual-detectingcamera list with the greatest RSSI rand transmitting the video feed therefrom to the remote computerized device.

[0058] If, at 536, it is determined that the list of dual-detecting cameras does not comprise one or more entries (i.e. has no entries) then the method 500 may continue at 542 with sorting the list of optical-detecting cameras by the identifiers camera optical identifiers and at 544 with selecting the first camera on the sorted list of optical- detecting cameras and transmitting the video feed therefrom to the remote computerized device.

[0059] If, at 530, the list of RF-detecting cameras does not comprise more than one entry, the method 500 may continue at 546 with sorting the list of optical-detecting cameras by the identifiers camera optical identifiers and at 548 with selecting the first camera on the sorted list of optical-detecting cameras and transmitting the video feed therefrom to the remote computerized device.

[0060] If, at 524, the list of optical-detecting cameras is determined not to have more than one entry, the method 500 may continue at 550 with determining if the length of RF-detecting cameras is greater than or equal to 1. If not, then the method 500 may terminate at 552, as no cameras having either optical detection or RF detection are identified, and thus no video feed can be selected. If yes, then the method 500 may continue at 554 with sorting the list of RF-detecting cameras with the camera having the greatest RSSI rvalue being first on the list and at 556 with selecting the camera at the front of the list of RF-detecting cameras and transmitting the video feed therefrom to the remote computerized device.

[0061] At the termination of method 500, each of the optical-detecting camera list, the RF-detecting camera list, and the dual-detecting camera list may have the entries comprised thereof removed and / or the list may be deleted and recreated in the next execution of method 500. This may prevent the unintended display of a video feed based on outdated and inaccurate detection information, resulting in showing a video feed that is less likely to show the patient wearing the patient-worn device.

[0062] Some of the illustrative aspects of the present invention may be advantageous in solving the problems herein described and other problems not discussed which are discoverable by a skilled artisan.

[0063] While the above description contains much specificity, these should not be construed as limitations on the scope of any embodiment, but as exemplifications of the presented embodiments thereof. Many other ramifications and variations are possible within the teachings of the various embodiments. While the invention has beendescribed with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best or only mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the description of the invention. Also, in the drawings and the description, there have been disclosed exemplary embodiments of the invention and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention therefore not being so limited. Moreover, the use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another. Furthermore, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.

Claims

What is claimed is:1 . A method for selecting a video stream comprising: receiving at a coordination hub (110) one or more transmissions from a plurality of cameras (120), each transmission being associated with a camera of the plurality of cameras (120); determining whether the one or more transmissions from the plurality of cameras (120) indicate detection of at least one of an optical detection of the patient-worn device (130) and a radio frequency (RF) detection of the patient-worn device (130); and responsive to determining at least one transmission of the one or more transmissions indicates detection of at least one of an optical detection of a patient-worn device (130) and an RF detection of the patient-worn device (130), selecting a video feed from a camera of the plurality of cameras (120) from which at least one of the one or more transmissions indicating detection was received.

2. The method for selecting a video stream of claim 1 further comprising: determining a list of optical-detecting cameras of the plurality of cameras (120) providing a transmission indicating an optical detection of the patient-worn device (130); and determining a list of RF-detecting cameras of the plurality of cameras (120) providing a transmission indicating an RF detection of the patient-worn device (130); wherein selecting a video feed comprises selecting a video feed from a camera comprised by at least one of the list of optical-detecting cameras and the list of RF- detecting cameras.

3. The method for selecting a video stream of claim 2 wherein selecting a video feed from a camera comprised by at least one of the list of optical-detecting cameras and the list of RF-detecting cameras comprises: weighting each camera comprised by the list of optical-detecting cameras by a first weighting value; weighting each camera comprised by the list of RF-detecting cameras by a second weighting value; and selecting a video feed of one or more cameras of the lists of optical-detecting cameras and RF-detecting cameras having the greatest weighted value.

4. The method for selecting a video stream of claim 3 wherein: the first weighting value is greater than a maximum value of the second weighting value; and the second weighting value is a value within a range of values, the value being proportionate to a measurement of a received signal strength received along with the indication of RF detection of the patient-worn device (130) associated with the RF- detecting camera, with the RF-detecting camera having the greatest received signal strength receiving a second weighting value that is a relatively greater value within the range of values and the RF-detecting camera having the lowest received signal strength receiving a second weighting value that is a relatively lower value within the range of values.

5. The method for selecting a video stream of claim 1 further comprising: determining a list of optical-detecting cameras of the plurality of cameras (120) providing a transmission indicating an optical detection of the patient-worn device (130); upon determining the list of optical-detecting cameras comprises one camera, selecting the video stream from the optical-detecting camera; upon determining the list of optical-detecting cameras comprises zero cameras: determining a list of RF-detecting cameras of the plurality of cameras(120) providing a transmission indicating an RF detection of the patient-worn device (130); upon determining the list of RF-detecting cameras comprises zero cameras; selecting no video streams of the plurality of cameras (120); and upon determining the list of RF-detecting cameras comprises one or more cameras: sorting the list of RF-detecting cameras by a measurement of the received signal strength received along with the indication of RF detection of the patient-worn device (130) associated with the RF-detecting camera; and selecting the video stream of the RF-detecting camera having the greatest received signal strength; upon determining the list of optical-detecting cameras is more than one: determining the list of RF-detecting cameras; upon determining the list of RF-detecting cameras comprises one camera, selecting the video feed of the RF-detecting camera;upon determining the list of RF-detecting cameras comprises more than one camera: comparing a camera identifier received along with each indication of optical detection of the patient-worn device (130) to a camera identifier received along with each indication of RF detection of the patient-worn device (130); determining a list of dual-detecting cameras for which the camera identifier was received in both an indication of optical detection of the patient-worn device (130) and an indication of RF detection of the patient- worn device (130); upon determining the list of dual-detecting cameras comprises one or more cameras: sorting the list of dual-detecting cameras by the measurement of the received signal strength received along with the indication of RF detection of the patient-worn device (130) associated with the dual-detecting camera; and selecting the video stream of the camera having the greatest measured signal strength; and upon determining the list of dual-detecting cameras comprises zero cameras: sorting the list optical-detecting cameras by the camera identifiers received along with the indication of optical detection of the patient-worn device (130); and selecting the video stream of the optical-detecting camera with the lowest value camera identifier; wherein the video stream that is selected is at least one of displayed on a display device, transmitted to a remote computerized device, and recorded on a computer- readable medium.

6. The method of claim 1 wherein the one or more transmissions are evaluated to determine whether a time threshold has elapsed since at least one of a transmission of the transmission of the one or more transmissions or a receipt of the transmission of the one or more transmissions.

7. The method of claim 1 wherein the steps recited in claim 1 are performed in a period of time that is less than or equal to a transmission cycle duration of at least one of an optical transmission device comprised by the patient-worn device (130) or an RF transmission device comprised by the patient-worn device (130).

8. The method of claim 1 further comprising: detecting at a detecting camera of the plurality of cameras (120) at least one of an optical transmission transmitted from an optical signal device comprised by the patient-worn device (130) or an RF signal transmitted from an RF transmission device comprised by the patient-worn device (130); and transmitting from the detecting camera of the plurality of cameras (120) to the coordination hub (110) a transmission indicating detection of the at least one an optical signal or an RF signal.

9. The method of claim 8 wherein a received RF transmission is detected, the method further comprising: measuring at the detecting camera a signal intensity of the received RF transmission; generating at the detecting camera an RSSI value responsive to the signal intensity; and transmitting from the detecting camera the RSSI value along with the transmission indicating detection of the received RF transmission.

10. The method of claim 8 wherein the optical transmission is detected within an infrared wavelength range within a range from 700 nanometers to 1 millimeter.11 . The method of claim 8 wherein the RF transmission conforms to an IEEE 802 wireless transmission standard.

12. The method of claim 8 further comprising: transmitting from the optical transmission device comprised by the patient-worn device (130) an optical signal comprising an optical unique identifier associated with the patient-worn device (130); andtransmitting from the RF transmission device comprised by the patient-worn device (130) an RF signal comprising an RF unique identifier associated with the patient-worn device (130).

13. A system for selecting a video stream comprising: a patient-worn device (130) comprising: an optical transmission device configured to emit an optical signal being electromagnetic radiation (EMR) within an infrared spectrum of EMR having a wavelength within a range from 700 nanometers to 1 millimeter; a radio frequency (RF) transmission device configured to emit an RF signal being EMR within a radio frequency spectrum of EMR having a frequency within a frequency range from 30 megahertz to 300 gigahertz; and a controller configured to control operation of each of the optical transmission device and the RF transmission device; a plurality of cameras (120) positioned within an observation area, each camera comprising: an optical detection device operable to detect optical signals emitted by the optical transmission device of the patient-worn device (130) within a field of view of the camera; an RF detection device operable to detect RF signals emitted by the RF transmission device of the patient-worn device (130); a video capture device operable to capture a video feed within the field of view of the camera; and a processor positioned in communication with each of the optical detection device, RF detection device, and video capture device and operable to: receive an indication from the optical detection device responsive to detecting an optical signal emitted by the optical transmission device; receive an indication from the RF detection device responsive to detecting an RF signal from the RF transmission device; receive the video feed from the video capture device; and generate a transmission comprising at least one of an indication of detecting an optical signal, detecting an RF signal, and the video feed; a communication device operable to transmit transmissions received from the processor; and a coordination hub (110) comprising:a processor; a communication device operable to: communicate with and receive transmission from the plurality of cameras (120); and transmit a selected video feed to a remote computerized device; and a non-transitory computer-readable storage medium comprising executable software that causes the processor to select a video feed received from the plurality of cameras (120) to be at least one of recorded to the non- transitory computer-readable medium and transmitted to a remote computerized device responsive to transmissions.

14. The system for selecting a video stream of claim 13 wherein: the optical transmission device comprises: an elongate body member; and a plurality of light-emitting diodes (LEDs) distributed along the elongate body member and configured to emit the optical signal; and the controller is configured to operate the plurality of LEDs to emit the optical signal.

15. The system for selecting a video stream of claim 14 wherein the elongate body member is configured to be worn on at least one of a head of the patient, a neck of the patient, a shoulder of the patient, and a waist of the patient.

16. The system for selecting a video stream of claim 14 wherein the elongate body member is a flexible circuit board.

17. The system for selecting a video stream of claim 13 wherein the optical signal has a modulated pulse within a range from 20 kHz to 60 kHz.

18. The system for selecting a video stream of claim 13 wherein the RF transmission device is configured to transmit an RF signal complying with an IEEE 802 standard.

19. The system for selecting a video stream of claim 13 wherein the optical detection device and the video capture device are a single hardware device.

20. The system for selecting a video stream of claim 13 wherein: each of the optical transmission device and the RF transmission device are configured to transmit an identifier in the respective optical signal and RF signal that is associated with the patient-worn device (130); and the controller is operable to: extract the identifier from the detected optical signal and the detected RF signal; and transmit the identifier in the transmission indicating detection of optical signals and RF signals.

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