Acoustic echo elimination and dereverberation method and device

A technology of echo cancellation and reverberation, which is applied in speech analysis, instruments, etc., can solve problems such as inability to enhance speech signals, and achieve the effect of improving clarity and enhancing the effect of microphones picking up speech time-domain signals

Pending Publication Date: 2020-10-13
INST OF ACOUSTICS CHINESE ACAD OF SCI +1
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Problems solved by technology

However, these algorithms only consider the situation when echo or reverberation exists alone in the environment, so when the two kinds of interference exist at the same time, the above algorithms cannot enhance the voice signal picked up by the microphone very well.

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  • Acoustic echo elimination and dereverberation method and device
  • Acoustic echo elimination and dereverberation method and device
  • Acoustic echo elimination and dereverberation method and device

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Embodiment Construction

[0062] The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0063] figure 1 It is a schematic diagram of a scene where two people make a hands-free call according to an embodiment of the present invention. In the embodiment of the present invention, end A is regarded as the proximal end, and end B is regarded as the far end. Correspondingly, the speech time-domain signal picked up by the A-end microphone is a speech time-domain signal interfered by echo and reverberation, including the A-end speaker's voice time-domain signal, the echo (that is, the delayed B-end picked up by the A-end microphone). The speaker's voice time-domain signal, where the B-side speaker's voice time-domain sign...

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Abstract

The embodiment of the invention discloses an acoustic echo elimination and dereverberation method and device. The method comprises the steps of: determining a corresponding frequency domain signal according to a microphone pickup voice time domain signal and a far-end speaker voice time domain signal transmitted by a loudspeaker; determining estimated masking according to a microphone pickup voicefrequency domain signal, a far-end speaker voice frequency domain signal and an echo elimination stage neural network in a preset cascade network; determining hidden masking according to the estimated masking, the amplitude spectrum of the microphone pickup voice frequency domain signal and a dereverberation stage neural network in the preset cascade network; and determining an estimated target voice time domain signal according to the amplitude spectrum of the microphone pickup voice frequency domain signal, the estimated masking, the hidden masking and the phase of the microphone pickup voice frequency domain signal. According to the embodiment of the invention, through the preset cascade network, echoes in the microphone pickup voice time domain signal are suppressed, reverberation isalso suppressed, the microphone pickup voice time domain signal is enhanced, and the integrity of the target voice is maintained.

Description

technical field [0001] The invention relates to the field of speech signal processing. In particular, it relates to an acoustic echo cancellation and de-reverberation method and device. Background technique [0002] In modern communication systems, such as teleconferencing, hands-free calls, etc., due to the existence of surface reflections in the signal transmission process and the existence of coupling between the speaker and the microphone, the far-end speaker often hears a mixed signal, which contains Echo (i.e. delayed own voice) and near-end speech with reverberation. Both echo and reverberation will seriously degrade the quality of the target speech. Therefore, how to remove echo and reverberation has become an important challenge in the field of speech signal processing. [0003] In recent years, methods based on deep learning have been widely used in speech signal processing, such as speech separation and speech enhancement based on deep learning. Many studies ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216G10L21/0224G10L25/30
CPCG10L21/0216G10L21/0224G10L25/30G10L2021/02082
Inventor 栾书明李军锋颜永红
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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