Microphone array-oriented acoustic echo cancellation method and device

An acoustic echo cancellation and microphone array technology, applied in speech analysis, speech recognition, instruments, etc., can solve the problem of difficult acoustic echo cancellation, and achieve the effect of improving the speech recognition rate

Active Publication Date: 2021-12-28
苏州奇梦者科技有限公司
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the object of the present invention is to solve the problem of difficult acoustic echo cancellation for far-field speech recognition, and provide a microphone array-oriented acoustic echo cancellation method and device based on the combination of independent component analysis algorithm and adaptive filtering idea

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  • Microphone array-oriented acoustic echo cancellation method and device
  • Microphone array-oriented acoustic echo cancellation method and device
  • Microphone array-oriented acoustic echo cancellation method and device

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Embodiment Construction

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following examples are intended to illustrate the invention, but not to limit the scope of the invention.

[0030] See figure 1 , figure 1 It is a preferred embodiment of a microphone array provided by the present invention. In this embodiment:

[0031] First, the microphone array collects data of the echo signal in the proximal signal and the echo channel in the recording channel in real time, and then selects the microphone channel signal of one of the microphones output, according to the data in the microphone channel signal, according to adaptive filtering ideology and independent component analysis The algorithm constructs an initialization model of ICA. The echo elimination model is established according to the ICA initialization model. The echo cancellation of the microphone channel signal is elected. According to the initial echo elimination model and the single-channel filter coefficient to build the echo elimin...

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Abstract

The invention relates to an acoustic echo cancellation method for a microphone array. The microphone array collects the data of the near-end signal and the echo signal in real time, selects the channel signal of one of the microphones, and constructs an initialization model according to the idea of ​​adaptive filtering and an independent component analysis algorithm. Initialize the model to establish an echo cancellation model to perform echo cancellation on the single-channel signal of the microphone, and construct an echo cancellation estimation model of other microphones in the microphone array according to the initial echo cancellation model and the filter coefficient of the single channel to perform echo cancellation. The present invention can perform echo cancellation on multi-channel The microphone array performs acoustic echo cancellation, provides effective data processing and improves the speech recognition rate; the device provided by the present invention arranges the acoustic sensor at a key position on a circular sensor array, and measures the multi-channel recording signal and echo signal of the system for echo Elimination, to obtain the echo cancellation signal of the microphone array, and finally achieve the purpose of improving the speech recognition rate.

Description

Technical field [0001] The present invention relates to a field of digital signal processing, and more particularly to an acoustic echo cancellation method and apparatus for a microphone array. Background technique [0002] With the coming of artificial intelligence, voice technology is increasingly attracted by people's interaction. Traditional near-field voice interaction technology can no longer meet people's needs, and people want to develop speech control smart devices in a further distance and more complex scenes. Thereby, the microphone array technology has become the core of far field voice interaction. [0003] The so-called microphone array, that is, a plurality of microphone systems that are somewhat acoustic sensors (microphones) are arranged in a certain rule, and is applied to the processing of speech signals. The previous speech interaction application scenarios mainly uses a single microphone, but the single microphone system needs to obtain a signal that meets th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0208G10L21/0216G10L15/34
Inventor 官威张李吴科苇李志
Owner 苏州奇梦者科技有限公司
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