An audio device is provided. The audio device includes processing circuitry which is connected to a loudspeaker and a microphone. The processing circuitry is configured to play an echo reference signal from a far end on the loudspeaker, and perform an acoustic echo cancellation (AEC) process using the echo reference signal and an acoustic signal received by the microphone using an AEC adaptive filter. The processing circuitry repeatedly determines a first status of the loudspeaker according to a relation between the played echo reference signal and the received acoustic signal, and transmits a first status signal indicating the first status of the loudspeaker to the far end through a cloud network.

A head mounted display (HMD) worn on a head of a first person that provides an electronic call between the first person and a second person. The HMD includes or more sensors that determine a size of a physical environment where the first person is located and objects in the physical environment. A display displays a virtual image of the second person during the electronic call, and one or more processors adjust a voice of the second person played to the first person to compensation for sound reverberation. The HMD include speakers that play the voice of the second person in binaural sound compensated for the sound reverberation.

A signal processing method includes obtaining, by a signal processing apparatus, a network delay time with respect to a device connected to the signal processing apparatus via a network, obtaining an input signal, determining an allowable upper limit of a delay time for an output signal corresponding to the obtained input signal based on the obtained network delay time and a total allowable delay time, selecting a signal processing having a longest delay time that is less than or equal to the allowable upper limit of the delay time, performing the selected signal processing on the obtained input signal, and transmitting the obtained input signal on which the selected signal processing has been performed, as the output signal, to the device connected to the signal processing apparatus via the network.

The present disclosure provides an echo cancellation method and a terminal and relates to the field of audio and video real-time communication technology. The echo cancellation method includes collecting, by a terminal, first-end audio data, the first-end data including a voice of a first-end user and an audio played by an audio playback device on the terminal. Then reference audio data corresponding to the first-end audio data is queried from a cache region, the cache region caches to-be-played audio data played on the audio playback device as the reference audio data. The reference audio data is then used to cancel the audio played by the audio playback device in the first-end audio data to determine the corrected audio data. Finally, the corrected audio data is sent to a second-end user terminal. Because the reference audio data is used to cancel the audio played on the audio playback device in the first-end audio data, the voice of the first-end user is left, the audio played on the audio playback device is prevented from interfering with the voice of the first-end user, thereby improving call quality between the first-end user and a second-end user.

During an electronic call between two individuals, a sound localization point simulates a location in empty space from where an origin of a voice of one individual occurs for the other individual.

A method for detecting and flagging problems in videoconferencing is provided. The method includes measuring, by a processing device of a user videoconferencing device, a first set of acoustic data associated with a conference room during a video conference attended by a plurality of users. The first set of acoustic data indicates one or more acoustic parameters, including the reverberation time, the signal-to-noise ratio, or the absolute noise level of the conference room. The method further includes comparing the one or more first acoustic parameters to one or more thresholds during the video conference. Moreover, the method includes providing at least one of the first acoustic parameters or a result of the comparison to the at least one user during the video conference.

A method for detecting and flagging problems in videoconferencing is provided. The method includes measuring, by a processing device of a videoconferencing device, a first set of acoustic data associated with a conference room during a video conference attended by a plurality of users. The first set of acoustic data indicates one or more acoustic parameters, including the reverberation time, the signal-to-noise ratio, or the absolute noise level of the conference room. The method further includes determining whether the acoustic parameters suggest that a feedback is to be provided to one or more of the users regarding an action to be performed to improve the acoustic parameters during the video conference. Moreover, the method includes responsive to determining that the feedback is to be provided to at least one user, providing the feedback to the at least one user during the video conference.

A method for detecting and flagging problems in videoconferencing is provided. The method includes measuring, by a processing device of a videoconferencing device, a first set of acoustic data associated with a conference room during a video conference attended by a plurality of users. The first set of acoustic data indicates one or more acoustic parameters, including the reverberation time, the signal-to-noise ratio, or the absolute noise level of the conference room. The method further includes determining whether the acoustic parameters suggest that a feedback is to be provided to one or more of the users regarding an action to be performed to improve the acoustic parameters during the video conference. Moreover, the method includes responsive to determining that the feedback is to be provided to at least one user, providing the feedback to the at least one user during the video conference.

A head mounted display (HMD) determines a distance between eyes of a user wearing the HMD, and head-related transfer functions (HRTFs) are selected based on the eye distance. The HMD displays a virtual image to the user and processes sound with the HRTFs into binaural sound that externally localizes at the virtual image. The HMD that determines the distance between the eyes of the user is also the HMD that displays the virtual image and processes the sound with the HRTFs.

A noise eliminating device including: an acoustic sensor array including a first acoustic sensor at a vertex forming a vertex angle of an isosceles triangle, and second and third acoustic sensors at the other vertexes of the isosceles triangle, the first sensor being arranged on a bisector between two boundaries between a direction range in which a target sound source can exist and a direction range in which a noise source can exist; and the second and third sensors being arranged so that the boundaries coincide with a direction of a perpendicular bisector of a line segment connecting the first and second sensors, and a direction of a perpendicular bisector of a line segment connecting the first and third sensors; and a processor to use signals output from the sensors to output a signal obtained by enhancing sound from the target sound source and eliminating noise from the noise source.