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13results about "Echo suppressors/cancellers" patented technology
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Environmental noise compensation in teleconferencing
A method of compensating for environmental noise during a teleconference may involve: estimating, by a control system, a current speech spectrum corresponding to speech of remote teleconference participants; estimating, by the control system, a current noise spectrum corresponding to environmental noise in a local environment in which a local teleconference participant is located; calculating, by the control system, a current speech intelligibility index (SII) based, at least in part, on the current speech spectrum and the current noise spectrum; determining, by the control system and based at least in part on the current SII, whether to make an adjustment of a local audio system used by the local teleconference participant, wherein the determining involves evaluating the current SII according to one or more target SII parameters; and updating at least one of the one or more target SII parameters responsive to user input corresponding to a playback volume change.
Owner:DOLBY LABORATORIES LICENSING CORP
Method of determining a perceptual impact of reverberation on the perceptual quality of a signal, and computer program product
ActiveCN116134801BSpeech analysisSupervisory/monitoring/testing arrangementsAudio frequencyWindow function
The invention relates to a method of determining a perceptual impact of an amount of echo or an amount of reverberation in a degraded audio signal on a perceptual quality of the degraded audio signal, wherein the degraded audio signal is received from an audio transmission system, the degraded audio signal being obtained by a transmission of a reference audio signal by the audio transmission system to provide the degraded audio signal. The method comprises performing a windowing operation on the degraded audio signal and the reference audio signal by multiplying the degraded audio signal and the reference audio signal with a window function to produce degraded digital audio samples and reference digital audio samples. A local estimate of the amount of echo or the amount of reverberation is determined based on the degraded digital audio samples and the reference digital audio samples.
Owner:NEDERLANDSE ORG VOOR TOEGEPAST NATUURWETENSCHAPPELIJK ONDERZOEK TNO
Ambient noise compensation in teleconferencing
PendingCN121464481ATwo-way loud-speaking telephone systemsGain controlCurrent noiseFrequency spectrum
A method of compensating for ambient noise during a teleconference may involve estimating, by a control system, a current speech spectrum corresponding to a speech of a remote teleconference participant; estimating, by the control system, a current noise spectrum corresponding to ambient noise in a local environment in which a local teleconference participant is located; calculating, by the control system, a current speech intelligibility index (SII) based at least in part on the current speech spectrum and the current noise spectrum; determining, by the control system and based at least in part on the current SII, whether to adjust a local audio system used by the local teleconference participant, where the determining involves evaluating the current SII according to one or more target SII parameters; and updating at least one of the one or more target SII parameters in response to a user input corresponding to the playback volume change.
Owner:DOLBY LABORATORIES LICENSING CORP
Conference system with reduced acoustic feedback
PendingCN121399970ATwo-way loud-speaking telephone systemsPublic address systemsEngineeringLoudspeaker
A conference system (400) comprising: a central server (401); a plurality of conference units (411, 412, 413, 511), each conference unit having a microphone (421, 422, 423) and a loudspeaker (431, 432, 433); and a network (103) connecting the conference units (411, 412, 413; 511) to a central server (401). A central server (401) generates a mixed signal (450) containing contributions of speaker signals (441, 443) from a subset of conference units (411, 413) with microphones (421, 423) in an on state, and the central server (401) is configured to downlink the mixed signal (450) to the conference units (411, 412, 413). The at least one conference unit (411, 413) is configured to subtract the estimated contribution (591) of its own speaker signal (441, 443) from the received mixed signal (451, 453) to generate a speaker signal (471, 473) for its speaker output, the speaker signal (471, 473) containing the contribution of the speaker signal (441, 443; 541) from a subset of the conference units (411, 413) but subtracting the own speaker signal of the at least one conference unit.
Owner:TELEVIC CONFERENCE NV
Spatial audio for video calls
Owner:NOKIA TECHNOLOGIES OY
Voice processing method, smart terminal and storage medium
A voice processing method, apparatus and system, a smart terminal, an electronic device (800) and a storage medium. The method includes: obtaining audio information in a conference process (S101, S201); generating a call flow and a recognition flow, respectively, according to the audio information (S102), where the call flow is used for a voice call, and the recognition flow is used for voice recognition; and sending the call flow and the recognition flow respectively (S103, S207). By means of the technical solution of respectively generating the call flow and the recognition flow based on the audio information, determined conference content corresponding to the audio information has more presentation dimensions and is richer, and thus the accuracy of the conference is improved, the intelligence and quality of the conference are improved, and the conference experience of users is further improved.
Owner:DOUYIN VISION CO LTD
Spatial audio for video telephony
PendingCN121531291ATwo-way loud-speaking telephone systemsImage enhancementAudio frequencyAudio signal
Examples of the present disclosure relate to spatial audio for video telephony in which two or more participants participate in the video telephony using different devices, but at the same acoustic location. The apparatus identifies two or more participant devices of the video phone at the acoustic location, where the participant devices provide images for the composite image for one or more recipients in the video phone. The at least one identified participant device provides an audio signal to the video phone such that the audio signal corresponds to the composite image. The apparatus also determines a location of the image from the identified participant device in the composite image, and associates audio signals from two or more participant devices with the image from the identified participant device in the composite image. The apparatus also adjusts the direction of the audio signal from the identified participant devices to increase the angle from the center so as to counteract audio leakage between the identified participant devices and render audio from the identified participant devices to the adjusted direction.
Owner:NOKIA TECHNOLOGIES OY
Spatial audio for video calls
PendingGB2643412ATwo-way loud-speaking telephone systemsImage enhancementAcoustic locationAudio frequency
Owner:NOKIA TECHNOLOGIES OY
Spatial audio for video calls
PendingUS20260113587A1Two-way loud-speaking telephone systemsImage enhancementMedicineComputer vision
Owner:NOKIA TECHNOLOGIES OY
Spatialized voice feedback
PendingUS20260059073A1Television conference systemsSpeech analysisOutput deviceHuman–computer interaction
Systems and methods for providing spatialized voice feedback for video conferences are provided. A computer-implemented method includes receiving a configuration for voice feedback for a client device including a spatial audio configuration including an apparent distance and direction. The method further includes receiving a first audio stream from a remote server. The method further includes receiving a second audio stream from an audio input device of the client device including a voice of a user of the client device. The method further includes playing the first audio stream on a first channel of an audio output device connected to the client device and a modified second audio stream on a second channel of the audio output device, in which the modified second audio stream is configured to cause the user of the client device to hear the voice of the user coming from the apparent distance and direction.
Owner:ZOOM COMMUNICATIONS INC
Efficient detection of co-located participant devices in teleconferencing sessions
ActiveUS12556655B2Television conference systemsTwo-way working systemsHuman–computer interactionTeleconference
Owner:GOOGLE LLC
Delay estimation for performing echo cancellation for co-located devices
PendingEP4674113A1Two-way loud-speaking telephone systemsSound producing devicesSoftware engineeringDelay
An audio transmission is received by a participant computing device. The participant computing device is one of a plurality of participant computing devices of a participant cohort that are co-located. Matched filters are generated based on the transmission that are configured to predict at least a portion of audio caused by playback of the transmitted audio signal. Each of the matched filters includes coefficients. An audio signal is captured with an audio capture device. The captured audio signal corresponds to audio produced by playback of the transmitted audio signal with audio output devices of devices of the participant cohort. A matched filter is identified that most accurately predicts the audio signal. A delay estimate is generated based on a predictive contribution of one of the coefficients of the matched filter.
Owner:GOOGLE LLC
Semi-global muting
ActiveUS12627760B2Special service for subscribersSound input/outputTelecommunicationsLong-haul communications
The present disclosure is directed towards a semi-global mute system and method. In one example, a method for muting communication devices includes receiving a message indicating the semi-global mute switch has been activated. The method further includes upon receiving the message: preventing a co-located communication device from receiving the audio signals transmitted from the first audio communication device, permitting the first audio communication device to transmit signals to the remote communication device, and permitting the first audio communication device and the co-located communication device to receive audio signals transmitted from the remote communication device.
Owner:IPC SYSTEMS INC