Microphone array-orientated acoustic echo cancellation method and device

Abstract

The invention relates to a microphone array-orientated acoustic echo cancellation method. According to the method, a microphone array acquires the data of near-end signals and echo signals in real time; the channel signals of one microphone are selected to construct an initialization model according to an adaptive filtering idea and an independent component analysis algorithm; an echo cancellationmodel is established according to the initialization model to perform echo cancellation on the single-channel signals of the microphone; and the echo cancellation models of the other microphones in the microphone array are constructed according to the initial echo cancellation model and a single-channel filter coefficient, so that the echo cancellation models can be adopted to perform echo cancellation. With the microphone array-orientated acoustic echo cancellation method of the invention, acoustic echo cancellation can be performed on the multi-channel microphone array, so that effective data processing can be provided, and a speech identification rate can be improved. According to a device provided by the invention, acoustic sensors are distributed at key positions on a ring-shaped sensor array so as to measure the multi-channel sound record signals and echo signals of a system and perform echo cancellation on the multi-channel sound record signals and the echo signals, so that theecho cancelled signals of the microphone array can be obtained, and therefore, a speech identification rate can be improved.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to an acoustic echo cancellation method and device for microphone arrays. Background technique [0002] With the advent of the era of artificial intelligence, speech technology, as an interface for human-computer interaction, has attracted more and more attention. Traditional near-field voice interaction technology can no longer meet people's needs, and people hope to develop smart devices that can be controlled by voice in longer distances and in more complex scenarios. As a result, microphone array technology has become the core of far-field voice interaction. [0003] The so-called microphone array refers to a plurality of microphone systems in which a certain number of acoustic sensors (microphones) are arranged according to certain rules, and is applied to the processing of voice signals. In the past voice interaction application scenarios, a single microphone was mai...

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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 reco

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