The invention provides a microphone signal delay compensation control method based on echo cancellation. The method comprises the following steps: after conducting short-time data analysis on a microphone signal and a loudspeaker signal, relatively accurately calculating the time difference between the two signals, and then performing expansion and alignment operations on a buffering area to realize no time delay between the two digital signal sources. The microphone signal delay compensation control method based on echo cancellation effectively solves the problem that due to time delay between the microphone signal and the loudspeaker signal in a non-real-time system such as an Android system, an acoustic echo cancellation module cannot be used normally; and on the premise of not performing any bottom-driver modification on a system platform, the problem of time delay between the microphone signal and the loudspeaker signal is simply and effectively solved, so that the echo cancellation function can complete the same technical effect on an application software layer under Android as the way that the echo cancellation function is directly added to a bottom driver.

Microphone signal delay compensation control method based on echo cancellation

The invention provides an echo cancellation method, an echo cancellation device and a terminal. The echo cancellation method comprises the following steps: receiving multiple voice signals sent by an opposite-side terminal; analyzing the voiceprint characteristic information of any voice signal in the multiple voice signals; determining the matching degree between the voiceprint characteristic information of any voice signal and pre-stored voiceprint characteristic information; and determining any voice signal with the matching degree higher than a preset matching degree as an echo signal, and filtering the echo signal out of the multiple voice signals. Through the technical scheme of the invention, the quality of voice call is improved, the influence of echo signals is reduced, and the user experience is improved.

Echo cancellation method, echo cancellation device and terminal

A threshold control system for controlling a non-linear processor in an echo canceller, the non-linear processor being configured to remove any signal energy below a threshold that remains in a microphone signal after the echo canceller has subtracted an echo estimate from it, the threshold control system comprising a convergence unit configured to determine an indication of the stability of an adaptive filter, the adaptive filter being configured to continuously model an echo path so as to generate the echo estimate, and a threshold tuner configured to adjust the threshold of the non-linear processor in dependence on the indication.

Auto-tuning of non-linear processor threshold

The invention provides an echo cancellation method, an echo cancellation device and call equipment, and relates to the field of communication. The method comprises the steps of caching record data and playback data; respectively marking the record data and the playback data with timestamps; acquiring the fixed delay of the call equipment; correcting the timestamp of the record data and the timestamp of the playback data according to the fixed delay; and canceling echo of the corrected record data. Therefore, accuracy of echo cancellation can be improved, data jitter can be eliminated, and call quality and effect in a VoIP multi-path call can be improved, and thus the effect with high quality can be acquired while people uses the VoIP call mode with low cost.

Echo cancellation method and device, and call equipment

An echo path change detector may be used to control the rate of adaptation in an acoustic echo canceller. When echo path change is declared, the rate of adaptation may be increased. However, echo path change should not be declared in the presence of double talk, because rapid adaptation during double talk is undesirable. Accordingly, various features are disclosed for detecting echo path changes while avoiding the declaration of such changes in the presence of double talk.

Echo path change detector with robustness to double talk

The invention provides a method and device for canceling an echo. The method comprises the steps of estimating echo path characteristic parameters of an echo signal, using a source signal of the echo signal as a reference signal, generating an echo estimating signal according to the echo path characteristic parameters, and subtracting the echo estimating signal from a voice signal to be processed. The method and device solve the problem that self adaptation can not be achieved when the near-end voice frequency is restrained from being back hauled in the correlation technique, and therefore the method and device are beneficial to improving the voice quality of a meeting and improving user experience.

Method and device for canceling echo

Provided are a method and device for eliminating echo. The method comprises: an echo path characteristic parameter of an echo signal is estimated; a source signal of the echo signal is taken as a reference signal, and an echo estimation signal is generated according to the echo path characteristic parameter; and the echo estimation signal is subtracted from a speech signal to be processed. The disclosure solves the problem in the related art that self-adaptation cannot be achieved when a returned near-end audio is suppressed, thus facilitating the enhancement of the speech quality of a conference and the improvement of user experience.

Method and device for elininating echoes

Provided are a method and device for eliminating echo The method comprises: an echo path characteristic parameter of an echo signal is estimated; a source signal of the echo signal is taken as a reference signal, and an echo estimation signal is generated according to the echo path characteristic parameter; and the echo estimation signal is subtracted from a speech signal to be processed The disclosure solves the problem in the related art that self-adaptation cannot be achieved when a returned near-end audio is suppressed, thus facilitating the enhancement of the speech quality of a conference and the improvement of user experience

Method and device for eliminating echoes

Provided are a method and device for eliminating echo. The method comprises: an echo path characteristic parameter of an echo signal is estimated; a source signal of the echo signal is taken as a reference signal, and an echo estimation signal is generated according to the echo path characteristic parameter; and the echo estimation signal is subtracted from a speech signal to be processed. The present invention solves the problem in the related art that self-adaptation cannot be achieved when a returned near-end audio is suppressed, thus facilitating the enhancement of the speech quality of a conference and the improvement of user experience.

Echo elimination method and device

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Method and device for canceling echo

Method and device for elininating echoes

Method and device for eliminating echoes

Echo elimination method and device