The invention discloses an echo cancellation processing method for a network voice call, which is characterized by comprising the following steps of: 1, acquiring a far-end (sound box) signal and a near-end (microphone) signal, and by fast Fourier transform, calculating power spectra of the far-end signal and the near-end signal; 2, obtaining an echo estimated value of the far-end signal by an adaptive filter; 3, calculating power spectrum densities of a far end and a near end, then calculating correlation, judging whether to eliminate echo, and if no, outputting a signal which is the near-endsignal; and 4, if yes, outputting a signal which is obtained by subtracting the echo estimated value from the near-end signal, and simultaneously, adaptively regulating and updating filter parameters. The echo cancellation processing method has the beneficial effects that a problem of influence of echo on the network voice call is solved, and the voice call quality is improved.

Echo cancellation processing method for network voice call

Embodiments of the invention disclose a short-time voice signal processing method and device, equipment and a storage medium. The method comprises the following steps of acquiring a near-end time-domain signal, and determining a far-end time-domain signal and an error time-domain signal which are matched with the near-end time-domain signal; determining an audio acquisition state matched with thenear-end time-domain signal, wherein the audio acquisition state comprises a single-talk state or a double-talk state; determining a residual echo amplitude spectrum and an ambient noise amplitude spectrum which are corresponding to the near-end time-domain signal according to the far-end time-domain signal, the error time-domain signal and the audio acquisition state; and generating an output time-domain signal which is matched with the near-end time-domain signal according to the residual echo amplitude spectrum, the ambient noise amplitude spectrum and the error time-domain signal. According to the technical scheme of the embodiments of the present invention, the residual echo and the ambient noise in a voice signal can be effectively inhibited in an echo scene, and the definition of the voice signal is improved.

Short-time voice signal processing method and device, equipment and storage medium

The invention provides an acoustic echo canceller output voice signal post-processing method and device and relates to the signal processing technology field. The method comprises steps that a presetAEC output signal subband spectrum is acquired; weighted processing on the AEC output signal subband spectrum is carried out according to the processing criterion that the distortion error of near-endvoice signal sub-band spectrum estimation is minimized on the condition that residual echo components of the AEC output signal subband spectrum are inhibited to a preset level, a liner estimation value of the near-end voice signal sub-band spectrum is acquired; and the liner estimation value of the near-end voice signal sub-band spectrum is outputted. The method is advantaged in that the distortion error of near-end voice signal sub-band spectrum estimation is minimized on the condition that the residual echo components of the AEC output signal subband spectrum are inhibited to the preset level, residual echo is effectively inhibited, and full duplex characteristic stability of a voice communication system is guaranteed.

Acoustic echo canceller output voice signal post-processing method and device

An acoustic echo canceller output voice signal post-processing method and apparatus, relating to the technical field of signal processing. The method comprises: obtaining a preset AEC output signal subband spectrum (11); performing weighted processing on the AEC output signal subband spectrum according to the processing criterion that the distortion error of near-end voice signal subband spectrum estimation is minimized on the condition that residual echo components of the AEC output signal subband spectrum are suppressed to a preset level, to obtain a liner estimation value of the near-end voice signal subband spectrum (12); and outputting the linear estimation value of the near-end voice signal subband spectrum (13). According to the method and apparatus, the distortion error of near-end voice signal subband spectrum estimation is minimized on the condition that the residual echo components of the AEC output signal subband spectrum are suppressed to the preset level, residual echo is effectively suppressed, and the stability of the full-duplex characteristic of a voice communication system is ensured.

Acoustic echo canceller output voice signal post-processing method and apparatus

The present invention provides an adaptive modulation coding method suitable for wireless communication system multiple scenes. The method comprises the steps of: determining an instant smooth parameter according to an estimated instant SINR (Signal to Interference plus Noise Ratio); according to the instant smooth parameter and a smooth parameter historical value, determining an available smoothparameter at present; according to the estimated instant SINR and the available smooth parameter at present, determining an available SINR at present; and according to the available SINR at present, inquiring a modulation coding mode comparison table available for the SINR and the system, and determining the modulation coding mode. The adaptive modulation coding method can adaptively perform regulation for the SINR smooth parameter according to the estimated SINR change to allow the finally used SINR to adaptively reflect the channel change, and performs filtering for little hair in an unstable state to finally determine the proper modulation coding mode according to the SINR. The adaptive modulation coding method is easy to implement and is suitable for various different scenes.

Adaptive modulation coding method suitable for wireless communication system multiple scenes

The invention provides a residual echo estimating method and device, and belongs to the technical field of voice signal processing. The method comprises that a residual error signal and an aligned far-end signal are obtained; a power spectrum of the residual error signal, a first power spectrum of the aligned far-end signal and a coherent function of the aligned far-end signal are obtained; a self-adaptive smoothing parameter is calculated and obtained; on the basis of the self-adaptive smoothing parameter and a preset rule, a second power spectrum of the aligned far-end signal is obtained; and according to the coherent function of the second power spectrum of the aligned far-end signal, an estimated value of residual echo is obtained. Thus, the residual echo can be estimated accurately.

Residual echo estimating method and device

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Residual echo estimating method and device