751results about "Public address systems" patented technology

A method for synchronizing audio reproduction in collocated end devices is presented. Each of the devices auto-correlates using noise to determine a threshold prior to the antenna receiving an audio signal. When the devices receive a common audio signal, they provide audio outputs. Each device cross-correlates its audio output with the audio outputs of the other devices. The timing of the audio output of each device is then adjusted such that the audio outputs of all of the devices align temporally with the lagging or leading device.

The invention provides a control method and device of a vehicle-mounted external loudspeaker and a vehicle-mounted external loudspeaker system. The control method comprises the following steps that in response to starting of a vehicle-mounted loudspeaker box mode, the relative position relation between a user and a vehicle is obtained at a preset time interval, and the vehicle is provided with a plurality of vehicle-mounted external loudspeakers making sounds outwards; determining a target loudspeaker and a corresponding sound channel from the plurality of vehicle-mounted external loudspeakers at least based on the relative position relationship; and controlling each target loudspeaker to play the audio data of the corresponding sound channel. The invention provides a mode of taking the vehicle as a large mobile sound box capable of providing a surround sound field, and the provided surround sound field can be adjusted according to the relative position relationship between the user and the vehicle, so that the hearing effect of the user when using the vehicle-mounted sound box is improved, the application scene of the vehicle is expanded, and the user experience is improved.

Example techniques relate to primary-ambient playback of surround audio by audio playback devices. Example playback devices described herein may include multiple speakers, such as a forward-firing audio transducer and side-firing audio transducers. Using example techniques, such playback devices may perform primary-ambient decomposition to separate surround channels into primary′ and ambient channels. The playback devices play back the ambient channel(s) via the side-firing transducers and the primary channel via the forward-firing transducer.

A system, method, and computer-readable medium for performing a smart audio operation. The smart audio operation includes detecting a plurality of audio devices available for use by an information handling system; monitoring information handling system audio related information; analyzing the information handling system audio related information using a trained smart audio artificial intelligence model; and, automatically connecting the information handling system to a particular audio device of the plurality of audio devices based upon the information handling system audio related information.

Methods, apparatus, systems, and articles of manufacture are disclosed to generate spatial audio based on computer vision. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a position of an audio source based on an image generated via a camera, and apply an audio spatialization filter to an audio signal generated by a microphone based on the position of the audio source.

A conferencing system includes a plurality of microphones and an audio processing system that performs blind source separation operations on audio signals to identify different audio sources. The system processes the separated audio sources to identify or classify the sources and generates an output stream including the source separated content.

Embodiments provide for a system and method that address challenges associated with audio routing of an incoming call between two devices operatively coupled via a short-range wireless connection. Ultrasonic watermark signals are generated and sent between the two devices. Detection and non-detection of the ultrasonic watermark signals controls the audio routing. The ultrasonic watermark signals can be modified based on a predetermined operational characteristic known only to the two devices for increased robustness to the system.

Multichannel audio playback devices and associated systems and methods are disclosed herein. In some examples, a first playback device is configured to receive a source stream of audio content comprising left, right and center input channels. In a first mode, the first playback device is configured to play back audio via a plurality of transducers based on the left, right, and center input channels. In a second mode, in which the first playback device is bonded to second and third playback devices, the first playback device is configured to (i) play back audio via the plurality of transducers based on at least the center input channel, (ii) cause audio to be played via the second playback device based on at least the right input channel, and (iii) cause audio to be played via the third playback device based on at least the left input channel.

This disclosure provides methods, devices, and systems for audio signal mixing. The present implementations more specifically relate to mixing audio signals from a microphone array by performing fixed beamforming to generate beams, reducing noise on the beams, and mixing the beams to generate a final audio signal for playback. In some aspects, an audio mixing system includes a fixed beamformer to generate beams from audio signals from a microphone array and noise reduction units (NRUs) to reduce a noise component of each audio beam. The system also includes logic to calculate a signal characteristic of each reduced noise audio beam to determine, based on the signal characteristics, the reduced noise audio beams that include a speech component. The logic also generates a gain for each audio beam based on the selection, with the gains used in beam mixing. In some aspects, the NRU includes a neural network noise reduction unit.

A multi-room audio synchronous playback method, a system, a device and a storage medium are provided. The multi-room audio synchronous playback method includes: creating an ad-hoc network using a plurality of audio devices supporting a target wireless communication protocol via point-to-point connection, the ad-hoc network covering a plurality of rooms, the target wireless communication protocol operating at a frequency band of 5 GHz to 7 GHz; dynamically analyzing link quality to select an optimum transmission path, and dynamically optimizing a network topology of the ad-hoc network via multi-hop relay; transmitting target audio data between the audio devices of the ad-hoc network based on the optimum transmission path, and performing real-time interaction and dynamic compensation based on a synchronization signal to obtain a synchronization parameter; and controlling each audio device of the ad-hoc network based on the synchronization parameter to synchronously play the target audio data.

A method for adaptive additive sound includes receiving ambient sound data corresponding to ambient sound in a first zone acquired by a microphone in the first zone, analyzing the ambient sound data from the first zone, generating audio signal data for the second zone based at least in part on the ambient sound data from the first zone, and transmitting the audio signal data for the second zone to a speaker in the second zone. The first zone is separate from the second zone within a space.

Digital signal processing (DSP) may be distributed across a plurality of endpoints and one or more aggregators in an audio system. An aggregator may perform DSP and / or may control DSP features performed by endpoints based on DSP feature capability of the endpoints and the aggregator. Links may be established between the aggregator and the endpoints to communicate audio signals and related information for performing the DSP features.

An audiovisual system uses a spatial position detection module to process audio signals and determine the location and orientation of a speaking participant. Based on this data, the system dynamically controls sensors to optimize audio and video capture. Behavioral and contextual information may also be used to train intelligence models for improved system performance. Further, sensor arrays may be utilized to identify gaze vectors of participants to select a camera sensor of the sensor array. Meeting content collected with the sensor array may be organized into meeting metrics in accordance with an analytics strategy before training an intelligence module with the meeting metrics. Meeting content may also be configured into digital tiles in accordance with a tile strategy. At least one of the digital tiles may be altered in response to a meeting condition detected by the sensor array.

A localized sound projection system can coordinate the sounds of speakers to simulate the placement of an auditory cue in a 3D space. The system can include a plurality of speakers configured to output auditory signals and a sound localization controller configured to control the plurality of speakers to coordinate the auditory signals to simulate an origination location of a patient alarm. The sound localization controller can determine adjusted auditory signals and control a plurality of speakers to output the plurality of adjusted auditory signals. A method for dynamically controlling speaker settings in a medical environment can include determining volume settings corresponding to a speaker, monitoring a level of ambient noise corresponding to a room of a patient, controlling the volume settings of the speaker to reduce or increase a sound level output of a speaker. A patient monitoring system can be configured to physically manipulate medical devices in response to audible commands. The system can receive a plurality of vocal commands from a user and can manipulate various settings after confirmation from a user.

A device is configured to (i) receive media content from a media source, (ii) generate a first series of frames including first portions of the media content and first playback timing information, (iii) generate a second series of frames including second portions of the media content and second playback timing information, (iv) transmit the first series of frames to a first playback device in a synchrony group for playback of the first portions of the media content in accordance with the first playback timing information, and (v) transmit the second series of frames to a second playback device in the synchrony group for playback of the second portions of the media content in accordance with the second playback timing information such that the media content is played back in synchrony by the synchrony group.

Various implementations include systems and approaches for grouping speakers. In some cases, an audio device includes: a body housing an electro-acoustic transducer; a controller for controlling the electro-acoustic transducer; and an actuatable control feature on the body configured to control audio output from an audio source at the electro-acoustic transducer in a plurality of modes, wherein, in a first of the plurality of modes, the audio output includes a subset of channels of the audio source, output in coordination with at least one additional audio device, and in a second of the plurality of modes, the audio output includes an entirety of the channels of the audio source, output in synchrony with the at least one additional audio device.

A communication protocol provides group communications between at least two wireless headsets. Multiple broadcast links, mutually time staggered, are established between the headsets for sequentially sending broadcast messages between group members. Group members can retransmit and forward one or more received broadcast messages to improve robustness and range. In the receiving headset, audio received in broadcast messages from multiple members is combined into a single audio signal provided to the loudspeaker of the receiving headset.

Disclosed herein are systems and methods for augmented reality multi-view telepresence. An embodiment takes the form of a method that includes obtaining a session geometry of a multi-location telepresence session that includes a first-location participant at a first location and a second-location participant at a second location, each location having respective pluralities of cameras and display segments. The method includes selecting, according to the session geometry, both a first-to-second-viewpoint second-location camera from the plurality of second-location cameras as well as a first-to-second-viewpoint first-location display segment from the plurality of first-location display segments. The method includes receiving a first-to-second-viewpoint video stream captured by the selected first-to-second-viewpoint second-location camera, and further includes generating a line-of-sight augmented-reality experience for the multi-location telepresence session at least in part by rendering the received first-to-second-viewpoint video stream via the selected first-to-second-viewpoint first-location display segment.

The invention provides a method, a device and a system for audio signal mixing. The present implementation more particularly relates to mixing audio signals from a microphone array to generate beams by performing fixed beamforming, reducing noise on the beams, and mixing the beams to generate a final audio signal for playback. In some aspects, an audio mixing system includes a fixed beamformer to generate beams from audio signals from a microphone array and a noise reduction unit (NRU) to reduce noise components of each audio beam. The system also includes logic to compute a signal characteristic of each de-noised audio beam to determine a de-noised audio beam including a speech component based on the signal characteristic. The logic also generates a gain for each audio beam based on the selection, wherein the gains are used in beam mixing. In some aspects, the NRU includes a neural network noise reduction unit.

Systems and methods are disclosed in which a playback device transmits a first sound signal including a predetermined waveform. In one example, the playback device receives a second sound signal including at least one reflection of the first sound signal. The second sound signal is processed to determine a location of a person relative to the playback device, and a characteristic of audio reproduction by the playback device is selected, based on the determined location of the person.

Systems and methods for mediating an audio source during a meeting are provided. An active audio source is identified and mapped to instances connected to a communications and collaboration platform to determine a mapped instance. An audio signal device is determined from multiple devices for capturing audio from the active audio source. An audio system is configured to manipulate an active audio signal from the audio signal device via the mapped instance. In some cases, upon identifying a new active audio source, a new mapped instance is determined corresponding to the new active audio source.

The invention provides a sound amplification device based on an M-H metamaterial and a sound transmission method using the sound amplification device, the sound amplification device at least comprises an upper shell, a lower shell and a waveguide located between the upper shell and the lower shell, and the waveguide is made of the Mie metamaterial; the waveguide comprises an outer wall, a plurality of sound wave inlets are formed in the outer wall, and the upper shell, the lower shell and the outer wall enclose a waveguide space; a through hole penetrating through the waveguide and the upper shell is formed in the waveguide space, and the through hole is a sound wave outlet in the sound amplification device; the waveguide comprises a plurality of fan parts which are arranged around the through hole in a circumferential radiation manner; a waveguide channel penetrating through the sound wave outlet and the sound wave inlet is formed between the adjacent fan parts; the control current of the sound source is determined by the size of the sound amplifying device and the scattering distribution condition of the sound amplifying device in different resonance modes, the sound at the sound wave outlet is larger than the sound at the sound source in energy level, and an included angle exists in the propagation direction. By determining the control current at the sound source which is most matched with the size of the sound amplifying device, the sound propagation control with low cost, high accuracy and wide application range is realized.

In a wireless stereo system including first and second battery-powered speakers, if low power is sensed in the second speaker, the user may be given the option of shifting the first speaker to mono mode, or maintain the first speaker in stereo mode, playing its assigned channel, or alter a left / right stereo balance between the speakers. Speaker setting may also change depending on whether a speaker is on or off a charging dock.

Generative media content (e.g., generative audio) can be played back across multiple playback devices concurrently. A generative content group coordinator device can receive input parameters, which can include sensor data, media content, or other such input. The coordinator device can generate first and second generative media content streams, each of which can be transmitted to first and second playback devices, respectively. The first and second playback devices can play back the first and second streams of generative media content concurrently.

Disclosed embodiments relate to Multi-Player Playback Devices. In some embodiments, the Multi-Player Playback Device is configured to selectively operate in one of a plurality of operating modes. In each operating mode, the Multi-Player Playback Device is configured to implement a multi-stage audio processing procedure comprising: (i) routing incoming audio streams to mixer inputs of a mixer based on a current operating mode in which the Multi-Player Playback Device is operating; (ii) for one or more audio streams routed to an individual mixer input, (a) generating a mixed stream based on the one or more audio streams routed to the mixer input, and (b) routing the mixed stream to at least one audio output of the Multi-Player Playback Device based at least in part on a channel map associated with the current operating mode in which the Multi-Player Playback Device is operating.

Systems and methods spatial audio rendering using spatialization shaders in accordance with embodiments of the invention are illustrated. One embodiment includes a spatial audio system, including a plurality of loudspeakers, where each loudspeaker includes at least one driver, a processor, and a memory containing a spatial audio rendering application, where the spatial audio rendering application directs the processor to obtain a plurality of audio stems, obtain a position and a rotation of each loudspeaker in the plurality of loudspeakers, obtain a relative location for each audio stem to be rendered, calculate a plurality of tuning parameters for each loudspeaker in the plurality of loudspeakers, provide the plurality of tuning parameters, the position and rotation of each loudspeaker to a spatialization shader, generate a driver feed for each driver in the plurality of loudspeakers using the spatialization shader, and render each audio stem at their respective location using the loudspeakers.

A control system may comprise a plurality of audio output devices (e.g., controllable speakers), and a remote control device having at least one button for selecting a preset, where the preset defines different commands for at least two of the audio output devices. The at least two audio output devices may be configured to be controlled according to the different commands (e.g., starting, pausing, or stopping playback, adjusting volume, etc.) in response to an actuation of the button of the remote control device. The control system may also comprise a load control device, such as a dimmer configured to control an intensity of a lighting load to a predetermined intensity in response to the actuation of the button of the remote control device to select the preset. The audio output device may be configured to play a feedback signal indicating an operational characteristic of the dimmer.

The utility model relates to the technical field of loudspeakers, and particularly discloses an invisible sound reinforcement plate which comprises a middle core layer which is a composite base material formed by interweaving carbon fibers and aramid fibers. The supporting layer is arranged at the upper end of the middle core layer, and the supporting layer is composed of a plurality of frameworks with the sections of regular hexagon structures and is of a honeycomb structure as a whole; the sound reinforcement plate has the advantages of high strength, good tensile effect, support of ultrahigh-frequency sound wave conduction, light weight and reduction of the overall weight of the sound reinforcement plate; the supporting layer is composed of a plurality of frameworks with the sections of regular hexagon structures, the whole supporting layer is of a honeycomb structure, rigidity is good, bending resistance is high, deformation is not prone to being caused in the assembling and using process, and therefore the using performance of the sound reinforcement plate is improved. The supporting ribs form a continuous force transmission path and disperse local stress, the trapezoid cross section reduces the stress concentration coefficient, and the buffering wrapping edge is made of silica gel materials, prevents external dust from invading the sound reinforcement plate interlayer and meanwhile plays a role in buffering and shock resistance.

Embodiments are provided for populating a preference database affiliated with a media playback system with preferences received for media items. A preference may be associated with a media item from a service provider account, and may be stored in the preference database in association with the service provider account. The service provider account may be associated with multiple user profiles used to access a media playback device, and the preference may be associated with one of the user profiles associated with the service provider account, and stored in association with the user profile. Further, the preference may be received from a user account different from a user account used to access the media item. In this case, the preference may be stored in association with the user account providing the preference. The stored preferences may be used to manage media content playback by the media playback system.