Abstract: In one embodiment, a computing system may determine, for a pixel, a sampling location within a texture that comprises a plurality of texels, and based on the sampling location, select a set of texels in the plurality of texels. Each texel in the set of texels may encode a distance field. An interpolated distance field associated with the sampling location may be computed based on the distance fields associated with the set of texels. The interpolated distance field may represent a relative distance between the sampling location and a texture edge. According to a blending proportion based on the interpolated distance field, the computing system may determine a blended color for the sampling location by blending, a first and second color associated with a first side of the edge and a second side of the edge, and output a color for the pixel based on the blended color.

Abstract: A system that uses persistent sound source selection to augment audio content. The system comprises one or more microphones coupled to a frame of a headset. The one or more microphones capture sound emitted by sound sources in a local area. The system further comprises an audio controller integrated into the headset. The audio controller receives sound signals corresponding to sounds emitted by sound sources in the local area. The audio controller further updates a ranking of the sound sources based on eye tracking information of the user. The audio controller further selectively applies one or more filters to the one or more of the sound signals according to the ranking to generate augmented audio data. The audio controller further provides the augmented audio data to a speaker assembly for presentation to the user.

Abstract: An apparatus for determining the position of artificial reality wearables may include a wearable dimensioned to be donned by a user of an artificial reality system. The apparatus may also include a sensor incorporated into the wearable. The sensor may detect physical interactions between the wearable and at least one specific body part of the user. The apparatus may further include a processing device communicatively coupled to the sensor. The processing device may determine, based at least in part on one or more physical interactions between the wearable and the specific body part of the user, a change in a position of the wearable relative to the specific body part of the user. Various other apparatuses, systems, and methods are also disclosed.

Abstract: Some embodiments include a high voltage direct current (HVDC) power generator system for information technology (IT) racks. The HVDC power generator system can include a three-phase alternating current (AC) transformer having a primary winding and a plurality of secondary windings. A plurality of three-phase bridge rectifier circuits can be electrically coupled respectively to the plurality of secondary windings. The HVDC power generator system can include output terminals for powering its load. A first string of bridge rectifier circuits can be in series with each other and a first inductor. A second string of bridge rectifier circuits can be in series with each other and a second inductor. The first and second strings can be electrically coupled in parallel to the output terminals.

Abstract: A waveguide includes an input area, a multi-layered substrate, and an output area. The multi-layered substrate includes a plurality of layers of at least a substrate and at least one partially reflective layers. The input area in-couples light in a first band into the waveguide. The one or more partially reflective layers are partially reflective to light in the first band. Each of the one or more partially reflective layers are located between respective layers of the plurality of layers of the substrate. The output area out-couples light from the waveguide. The pupil replication density of the out-coupled light is based in part on a number of the one or more partially reflective layers and respective locations of the one or more partially reflective layers in the waveguide.

Abstract: In general, this disclosure describes encryption engines that adaptively synchronize signals and suppress glitch propagation in a data decryption pipeline. An apparatus includes a decryption data path having a plurality of computational stages arranged in a pipeline configured to decrypt an encrypted block of data to form a decrypted block of data. One of the computational stages included in the pipeline of the decryption data path includes multiple asymmetric logical paths. A first signal traverses a first logical path and a second signal traverses a second logical path having a greater number of logical units than the first logical path. A glitch suppression register of the apparatus is configured to synchronize the first signal with respect to the second signal such that the first signal and the second signal arrive at a downstream logic element of the computational stage of the decryption data path at substantially a same time.

Abstract: The disclosed systems and methods are generally directed to providing a musculoskeletal representation of a hand. The system comprises one or more neuromuscular sensors configured to record a plurality of neuromuscular signals from a user and at least one computer processor. The computer processor is programmed to provide the plurality of neuromuscular signals as input to one or more trained inference models. The one or more trained inference models may include a smoothing function such as a loss function, such as a total variation loss function, a finite difference loss function, or another suitable loss function, to generate a temporally smooth output based on the processed neuromuscular signals. The computer processor is further programmed to determine the musculoskeletal representation of the hand based on the temporally smooth output. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: An audio system for customizing sound fields for increased user privacy. A microphone array of a headset detects sounds from one or more sound sources in a local area of the headset. The audio system estimates array transfer functions (ATFs) associated with the sounds, and determines determining sound field reproduction filters for a loudspeaker array of the headset using the ATFs. The audio system presents audio content, via the loudspeaker array, based in part on the sound field reproduction filters. The presented audio content has a sound field that has a reduced amplitude in a first damped region of the local area that includes a first sound source of the one or more sound sources.

Abstract: An electronic display assembly includes a display element and a corrective element coupled to the display element. The display element has a first plurality of sub-pixels of a first type and a second plurality of sub-pixels of a second type. Two adjacent sub-pixels of the first plurality of sub-pixel are separated by a sub-pixel distance. The corrective element has a plurality of features configured to diffuse light emitted by the first plurality of sub-pixels such that an apparent distance between the two adjacent sub-pixels of the first type, viewed at a viewing distance away from the electronic display assembly, is less than the sub-pixel distance.

Abstract: In one embodiment, a kernel of an operating system receives a request to store a message in a message buffer, which includes a plurality of chunks. Each chunk of the message buffer is associated with a message-occupancy indicator. The kernel determines a start and end position of the message when stored in the message buffer. The kernel determines, based on the start and end positions, whether the message, when stored, will occupy more than one chunk. Responsive to determining that the message will occupy more than one chunk, the kernel determines each chunk that will contain the message when stored. If a message occupancy-indicator associated with each chunk indicates that at least each chunk after a first chunk associated with the start position is unoccupied, the kernel stores the message in the message buffer and updates the message-occupancy indicator for each chunk containing the stored message.

Abstract: A light emitting diode (LED) chip is bonded to a substrate. The LED chip includes one or more dummy electrodes that corresponds to one or more contacts on the substrate. The one or more dummy electrodes are exposed to a laser beam for coupling the one or more dummy electrodes to the one or more contacts. The one or more dummy electrodes may be positioned along edges of the LED chip that surround a display area of the LED chip and provide bonding strength between the LED chip and the substrate.

Abstract: An audio system in a local area providing an audio signal to a headset of a remote user is presented herein. The audio system identifies sounds from a human sound source in the local area, based in part on sounds detected within the local area. The audio system generates an audio signal for presentation to a remote user within a virtual representation of the local area based in part on a location of the remote user within the virtual representation of the local area relative to a virtual representation of the human sound source within the virtual representation of the local area. The audio system provides the audio signal to a headset of the remote user, wherein the headset presents the audio signal as part of the virtual representation of the local area to the remote user.

Abstract: This disclosure describes systems on a chip (SOCs) that prevent side channel attacks (SCAs). The SoCs of this disclosure concurrently operate multi-round encryption and decryption datapaths according to a combined sequence of encryption rounds and decryption rounds. An example SoC of this disclosure includes an engine configured to encrypt transmission (Tx) channel data using a multi-round encryption datapath, and to decrypt encrypted received (Rx) channel data using a multi-round decryption datapath. The SoC further includes a security processor configured to multiplex the multi-round encryption datapath against the multi-round decryption datapath on a round-by-round basis to generate a mixed sequence of encryption rounds and decryption rounds, and to control the engine to encrypt the Tx channel data and decrypt the encrypted Rx channel data according to the mixed sequence of encryption rounds and decryption rounds.

Abstract: The disclosed system may include a substructure configured to support various components, an actuator configured to provide substantially linear motion along a specified axis in response to an electrical input, an input component hingedly coupled to the substructure, where the input component is configured to receive input from a user, and a mechanical linkage coupled to the input component and to at least a portion of the actuator. The mechanical linkage may be configured to translate the substantially linear motion provided by the actuator to a rotary force applied to the input component via the mechanical linkage. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: A GaN layer of micro-LEDs is exposed to ion implantation to amorphize one or more regions of the GaN layer. As a result, the GaN layer through which light rays propagate have non-uniform refractive indexes that modify propagation paths of some light rays. Ions are implanted in a region overlapping an active region that emits light to function as a converging GRIN (gradient-index) lens. The ion implanted regions collimate light rays that propagate along predetermined directions. As such, the light extraction from and the focus of the micro-LEDs is increased.

Abstract: A system can include one or more processors configured to execute a first object tracker to detect one or more objects in images received via a sensor of a device, monitor one or more metrics of the first object tracker, determine that the one or more metrics do not meet a criteria corresponding to a profile of the device, and use, responsive to the determination, a second object tracker instead of the first object tracker.

Abstract: In an embodiment, a method involves accessing a first pixel block of an image, the first pixel block comprising pixels, each associated with three color values, determining whether to separately or jointly encode the three color values of each of the pixels of the first pixel block, determining that the three color values of each of the pixels in the first pixel block are to be jointly encoded based on (1) determining, based on the three color values of each of the pixels, a line defined within a three-dimensional coordinate system in which each of the pixels is represented as a three-dimensional point and (2) determining that the line satisfies a predetermined criteria, and encoding the three color values of each of the pixels in the first pixel block as a single quantized value based on a projection of the three-dimensional point associated with that pixel onto the line.

Abstract: The disclosed computer-implemented method may include identifying a muscle group engaged by a user to execute a predefined body action by (1) capturing a set of images of the user while the user executes the predefined body action, and (2) associating a feature of a body of the user with the muscle group based on the predefined body action and the set of images. The method may also include determining, based on the set of images, a set of parameters associated with the user, the muscle group, and the predefined body action. The method may also include directing a computer-generated avatar that represents the body of the user to produce the predefined body action in accordance with the set of parameters. Various other methods, systems, and computer-readable media are also disclosed.