AUDIO SOURCE CLASSIFICATION FOR HANDSFREE COMMUNICATIONS
Granted: September 19, 2024
Application Number:
20240312472
This disclosure provides methods, devices, and systems for audio signal processing. The present implementations more specifically relate to speech enhancement techniques that utilize multi-channel audio signals for audio source classification. In some aspects, a speech enhancement system may include an adaptive filter, a feature extractor, and a feature classifier. The adaptive filter is configured to receive a multi-channel audio signal, via at least a first microphone and a second…
ADAPTIVE PROXIMITY SENSING DELAY
Granted: September 19, 2024
Application Number:
20240310955
An input device includes a proximity sensing panel including sensor electrodes and a proximity sensing circuit. The proximity sensing circuit is configured to acquire, for a sensing frame, sensing measurements of a sensing region using the sensor electrodes, process, for the sensing frame, the sensing measurements to obtain positional information, transmit the positional information to a processing system, and receive, from the processing system, vertical synchronization (Vsync) signal…
LOW-LATENCY SPEECH ENHANCEMENT
Granted: September 12, 2024
Application Number:
20240304204
This disclosure provides methods, devices, and systems for audio signal processing. The present implementations more specifically relate to low-latency speech enhancement. In some aspects, a speech enhancement system may receive a number (B) of frames of a signal, where each of the B frames include a number (N) of time-domain samples. The speech enhancement system may transform the B*N time-domain samples into B*N first frequency-domain samples based on an N-point fast Fourier transform…
NETWORK-AGNOSTIC REGION OF INTEREST (ROI) INFERENCING
Granted: August 8, 2024
Application Number:
20240265665
This disclosure provides methods, devices, and systems for object detection. The present implementations more specifically relate to region of interest (ROI) inferencing techniques that can be implemented using a single object detection model. In some aspects, a computer vision system maps a set of grid cells to an input image so that each grid cell includes a respective portion of the image, and where each of the grid cells is assigned a respective priority value. The system selects an…
DATA PRE-PROCESSING FOR LOW-LIGHT IMAGES
Granted: August 1, 2024
Application Number:
20240257303
This disclosure provides methods, devices, and systems for low-light imaging. In some implementations, an image processor may be configured to reduce or remove noise associated with an image based, at least in part, on a neural network. For example, the neural network may be trained to infer a denoised representation of the image. In some aspects, the image processor may scale the brightness level of the image to fall within a normalized range of values associated with the neural…
VIDEO COMPRESSION BASED ON SPATIAL-TEMPORAL FEATURES
Granted: August 1, 2024
Application Number:
20240259576
This disclosure provides methods, devices, and systems for video compression. The present implementations more specifically relate to video compression techniques that account for spatial-temporal changes in pixel values. In some aspects, an encoder may determine a change importance factor (CIF) for each image tile of a current image to be encoded. The encoder may calculate the CIF for an image tile of the current image (the “current image tile”) based on a degree of variation among…
VIDEO COMPRESSION BASED ON SPATIAL-TEMPORAL FEATURES
Granted: August 1, 2024
Application Number:
20240259575
This disclosure provides methods, devices, and systems for video compression. The present implementations more specifically relate to video compression techniques that account for spatial-temporal changes in pixel values. In some aspects, an encoder may determine a change importance factor (CIF) for each image tile of a current image to be encoded. The encoder may calculate the CIF for an image tile of the current image (the “current image tile”) based on a degree of variation among…
IMAGE PROCESSING SYSTEM FOR REGION-OF-INTEREST-BASED VIDEO COMPRESSION
Granted: August 1, 2024
Application Number:
20240259571
An apparatus for remote processing of raw image data receives the raw image data from a camera, such as a security camera. The apparatus includes a detection module to detect portions of the image data that contain possible regions of interest. Information indicating the portions that contain the possible regions of interest is then used during a compression process so that the portions that contain the possible regions of interest are compressed using one or more compression algorithms…
NEURAL TEMPORAL BEAMFORMER FOR NOISE REDUCTION IN SINGLE-CHANNEL AUDIO SIGNALS
Granted: August 1, 2024
Application Number:
20240257827
This disclosure provides methods, devices, and systems for audio signal processing. The present implementations more specifically relate to multi-frame beamforming using neural network supervision. In some aspects, a speech enhancement system may include a linear filter, a deep neural network (DNN), a voice activity detector (VAD), and an IFC calculator. The DNN infers a probability of speech (pDNN) in a current frame of a single-channel audio signal based on a neural network model. The…
SPATIO-TEMPORAL BEAMFORMER
Granted: August 1, 2024
Application Number:
20240257822
This disclosure provides methods, devices, and systems for signal processing. The present implementations relate more specifically to a spatio-temporal beamformer. In some aspects, a beamforming system may receive an audio signal via a plurality of microphones, the audio signal including a number (B) of frames for each of the plurality of microphones, each of the B frames for each of the plurality of microphones including a number (N) of time-domain samples. For a first microphone, the…
HYBRID INTER-FRAME CODING USING AN AUTOREGRESSIVE MODEL
Granted: July 18, 2024
Application Number:
20240244237
This disclosure provides methods, devices, and systems for video coding. The present implementations more specifically relate to hybrid coding techniques that combine aspects of inter-frame coding with aspects of intra-frame coding. In some aspects, a video encoder may perform inter-frame coding in a weighted manner so that the coded video frames (also referred to as “residual frames”) may include contributions from the current video frame to be transmitted over a communication…
MULTI-PASS NEURAL NETWORK FOR SPEECH ENHANCEMENT
Granted: July 18, 2024
Application Number:
20240242726
This disclosure provides methods, devices, and systems for audio signal processing. The present implementations more specifically relate to multi-pass neural networks configured for speech enhancement. In some aspects, a speech enhancement system may include a deep neural network (DNN) and a statistical signal processor (SSP). The DNN is configured to receive an input audio signal and infer a speech signal representing a speech component of the input audio signal based on a neural…
NEURAL NETWORK CACHING FOR VIDEO
Granted: June 27, 2024
Application Number:
20240212333
This disclosure provides methods, devices, and systems for machine learning. The present implementations more specifically relate to techniques for reducing the computational load of a convolutional neural network (CNN) when processing successive video frames. In some aspects, a machine learning system may cache or store the outputs (also referred to as “activations”) produced by one or more layers of a CNN so that one or more cached activations can be substituted for respective…
BACKLIGHT CONTROL FOR DISPLAY DEVICES
Granted: June 20, 2024
Application Number:
20240203368
A display driver includes a display panel, a backlight array, and backlight control circuitry. The backlight array includes a plurality of light sources and is configured to illuminate the display panel. The backlight control circuitry is configured to determine first base luminance for a first light source of the plurality of light sources based at least in part on pixel data for a first set of pixels associated with the first light source. The backlight control circuitry is further…
IMAGE DATA RECEPTION VIA NON-VIDEO INTERFACE
Granted: June 6, 2024
Application Number:
20240184737
This disclosure provides methods, devices, and systems for transmitting and receiving image data. The present implementations more specifically relate to repurposing non-video interfaces to receive image data. In some aspects, an image processing device may be coupled to an image source via an audio interface. For example, the audio interface may be an inter-IC sound (I2S) serial bus interface having at least a serial data input and a word select (WS) input. In some implementations, the…
NEURAL NETWORK TRAINING FOR SPEECH ENHANCEMENT
Granted: May 23, 2024
Application Number:
20240170008
A method of training neural networks may include receiving a sequence of audio frames, and mapping a first audio frame in the sequence of audio frames to a first output frame based on a neural network. The first output frame may represent a noise-invariant component of the first audio frame. The method may also include determining a first loss value based on differences between the first output frame and a first ground truth frame. The method may include mapping the first audio frame to…
HOWLING SUPPRESSION FOR ACTIVE NOISE CANCELLATION (ANC) SYSTEMS AND METHODS
Granted: May 23, 2024
Application Number:
20240169969
An audio processing system, such as an active noise cancellation system, and method suppresses tonal howling in a feedback system based on a gain enhancement system that emphasizes the howling signal and deemphasizes non-howling signals. The howling signal is extracted from an error signal generated from sound from a speaker sensed by an error sensor. The gain enhancement signal is generated based on a first power ratio between a filtered reference signal, generated based on sound sensed…
REDUCING IMAGE SCALING ARTIFACTS VIA TILE SIZE SELECTION
Granted: May 23, 2024
Application Number:
20240169478
This disclosure provides methods, devices, and systems for image scaling. The present implementations more specifically relate to downscaling techniques that preserve a subset of pixel values in a digital image so that all reconstructed pixel values in the upscaled image can be interpolated based on two or more preserved pixel values. In some aspects, an image downscaler may partition a digital image into a number of image tiles based on a base tile size and one or more scaling factors…
MULTI-FREQUENCY SIMULATANEOUS ABSOLUTE CAPACITANCE TOUCH SENSING
Granted: February 29, 2024
Application Number:
20240069667
An input device that includes multiple electrodes disposed in a sensing region of the input device and a sensing circuit coupled to a first electrode and configured to detect an input object proximate the sensing region. The sensing circuit includes an amplifier having an inverting input coupled to the first electrode, a non-inverting input coupled to a drive signal, and an output generating a resulting signal. The sensing circuit includes a feedback capacitor coupled between the output…
BACKLIGHT CONTROL FOR DISPLAY DEVICES
Granted: February 1, 2024
Application Number:
20240038183
A display device includes a display panel, a backlight module, and backlight control circuitry. The backlight module is configured to illuminate the display panel, the backlight module comprising a plurality of light sources. The backlight control circuitry is configured to control first luminance of a first light source of the plurality of light sources based at least in part on a first weighted average of brightness values for a first set of pixels of the display panel.
