A controller for an acoustic echo canceller is described. The controller includes a noise estimator configured to estimate a level of noise that is comprised in a microphone signal relative to an echo component, estimated by the acoustic echo canceller, comprised in the microphone signal. The controller further includes a control module configured to control the acoustic echo canceller in dependence on that estimate.

Controlling Operational Characteristics of Acoustic Echo Canceller

Power amplifier circuits can behave in a non-linear manner particularly when operated to produce output signal swings approaching an amplifier saturation region. A pre-distortion signal can be applied to a signal to be transmitted to compensate for such power amplifier non-linearity. In applications where two or more transmitter power amplifiers are used, a beam-former can be configured to modify a digitally pre-distorted transmission signal by applying respective beam-forming weighting factors to the digitally pre-distorted transmission signal to provide input transmission signals for respective ones of the power amplifier circuits. The pre-distortion signal can be established at least in part using one or more of a sensed or estimated representation of a transmitted beam formed by spatially aggregating transmitted outputs from the two or more power amplifier circuits. In this manner, power amplifier efficiency can be enhanced without entirely separate pre-distortion compensation for each of the power amplifier circuits.

Spatial digital pre-distortion

Some implementations involve analyzing audio packets received during a time interval that corresponds with a conversation analysis segment to determine network jitter dynamics data and conversational interactivity data. The network jitter dynamics data may provide an indication of jitter in a network that relays the audio data packets. The conversational interactivity data may provide an indication of interactivity between participants of a conversation represented by the audio data. A jitter buffer size may be controlled according to the network jitter dynamics data and the conversational interactivity data. The time interval may include a plurality of talkspurts.

Jitter buffer control based on monitoring of delay jitter and conversational dynamics

Disclosed are an apparatus and a method of cancelling an echo signal flowing in a microphone of an electronic device. The electronic device may include: a microphone configured to receive a sound signal; an Application Processor (AP) configured to execute an application; a communication module configured to control a voice call service; a speaker configured to output a sound signal; an audio processing module configured to process an output of at least one of an audio signal received from the AP, a voice signal received from the communication module, or a combined signal to the speaker; a first Acoustic Echo Canceller (AEC) configured to cancel an echo of the sound signal received through the microphone based on the output from the audio processing module and provide the signal to the AP, the first AEC being located in at least one of the AP, the audio processing module, and an external pre-processing module; and a second AEC configured to cancel an echo of the sound signal received through the microphone based on the output from the audio processing module and provide the signal to the communication module, the second AEC being located in at least one of the communication module, the audio processing module, and the external pre-processing module. Other embodiments may be possible.

Method of cancelling echo and electronic device thereof

The invention provides an audio processing system and method based on echo suppression switch in voice detection. The system comprises a local voice detection module, a network voice detection module,an attenuator module, a switch module, an echo suppression module, a speaker and a pickup device. When the local voice detection module determines a local voice, and the network voice detection module determines no voice in the network through a voice detection method, the switch module forwards an audio stream C not passing through the echo suppression module to an audio stream E, so as to reduce distortion of the audio stream E, the attenuator module is started to attenuate an audio stream A, so as to prevent the audio stream A, the background noise, from inhibiting the network to send theaudio stream E, further, slight background sound of the audio stream A received by the network is kept. Through adoption of the system and method, the local voice processing process eliminates necessary echo and reduces echo suppression, so that the voice is less damaged, and the sound quality of the network audio stream E sent locally is improved.

Audio processing system and method based on echo suppression switch in voice detection

A method for controlling acoustic echo cancellation and an audio processing apparatus are described. In one embodiment, the audio processing apparatus includes an acoustic echo canceller for suppressing acoustic echo in a microphone signal, a jitter buffer for reducing delay jitter of a received signal, and a joint controller for controlling the acoustic echo canceller by referring to at least one future frame in the jitter buffer.

Method for controlling acoustic echo cancellation and audio processing apparatus

The application describes a method used for controlling acoustic echo cancellation, and an audio processing device In one execution method, the audio processing device includes: an acoustic echo canceller used for inhibiting acoustic echoes in microphone signals, a jitter buffer used for reducing delay jitters of received signals and a joint controller used for controlling the acoustic echo canceller through referring to at least one future frame in the jitter buffer

Method used for controlling acoustic echo cancellation, and audio processing device

The embodiment of the invention relates to space consistency adjustment, and discloses a method for adjusting the space consistency in a video conference system. The method comprises the steps of detecting the space consistency between a visual scene acquired by video endpoint equipment and an auditory scene acquired by audio endpoint equipment, wherein the video endpoint equipment is positioned relative to the video endpoint equipment, and the space consistency is the degree of calibration between the auditory scene and the visual scene; comparing the detected space consistency with a preset threshold; and adjusting the space consistency in response to a condition that the detected space consistency is less than the threshold. The invention further discloses a corresponding system and a corresponding computer program product.

Method for adjusting space consistency in video conference system

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Method for controlling acoustic echo cancellation and audio processing apparatus

Method used for controlling acoustic echo cancellation, and audio processing device

Method for adjusting space consistency in video conference system