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Microphone speech enhancement method and microphone speech enhancement device

A speech enhancement, microphone technology, applied in speech analysis, instruments, etc., can solve problems such as limited performance

Inactive Publication Date: 2016-01-13
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the speech enhancement technologies in the prior art can only process the original speech collected by the array of speech acquisition devices with few array elements and small spacing, so the performance of traditional array speech enhancement technologies is often very limited.

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  • Microphone speech enhancement method and microphone speech enhancement device
  • Microphone speech enhancement method and microphone speech enhancement device
  • Microphone speech enhancement method and microphone speech enhancement device

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Embodiment Construction

[0093] In order to provide an effective implementation solution, the present invention provides the following embodiments, which will be described below in conjunction with the accompanying drawings.

[0094] First of all, beamforming technologies related to the present invention include two types of fixed beams and adaptive beams.

[0095] Fixed beam means that the parameters of the array signal processing system do not change with the pick-up signal, but are determined by the array topology and the preset noise field model, including fixed beams in the time domain and fixed beams in the frequency domain. The directivity of the fixed beam in the middle and low frequencies becomes worse, and the voice signal is a broadband signal. If the directivity of the middle and low frequencies is improved, the robustness of the array will deteriorate, so it is rarely used alone in the actual small microphone array application.

[0096] The adaptive beam is to dynamically generate the opt...

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Abstract

The invention provides a microphone speech enhancement method and a corresponding device. The method comprises the steps of acquiring first array speech signals which are acquired and inputted through multi-channel digital speech acquisition equipment; calculating optimal beam output signals synthesized by the first array speech signals by adopting the first array voice signals according to a minimum variance adaptive beam optimization model of the first array speech signals; and carrying out single-channel speech enhancement processing by adopting a power spectrum estimation value of the optimal beam output signals, wherein the minimum variance adaptive beam optimization model of the first array speech signals comprises a space guidance vector from a target sound source to the multi-channel digital speech acquisition equipment. The microphone speech enhancement method and the microphone speech enhancement device provided by the invention can process original speech of a speech acquisition equipment array with many array elements and large spacing.

Description

technical field [0001] The invention relates to speech processing, in particular to a microphone speech enhancement method and device. Background technique [0002] With the development of hands-free calls, conference systems, smart homes and smart home appliances, high-quality long-distance voice pickup has become one of the key factors affecting the performance of voice acquisition and processing systems. In order to adapt to the complex sound environment, single-microphone technology is already difficult to do, and microphone arrays with multi-channel voice acquisition devices are increasingly becoming the mainstream, among which various beamforming technologies and voice enhancement technologies are the most commonly used. Speech enhancement technology needs to extract as pure target speech as possible from the original speech signal collected by speech collection equipment. Beamforming technology improves the sensitivity of the microphone array to sound in a certain di...

Claims

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Application Information

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IPC IPC(8): G10L21/0216G10L21/0332
CPCG10L21/02
Inventor 范泛付中华黎家力
Owner ZTE CORP
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