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Speech recognition method and device based on artificial intelligence

A technology of speech recognition and artificial intelligence, applied in speech recognition, speech analysis, measuring devices, etc., can solve the problem of low far-field speech recognition rate and achieve the effect of solving the low far-field speech recognition rate

Active Publication Date: 2017-11-03
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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Problems solved by technology

[0006] For this reason, the first object of the present invention is to propose a speech recognition method based on artificial intelligence, to realize de-reverberation, enhancement, and denoising processing of the speech recognition input signal, to solve the problem of far-field speech recognition rate in the prior art. low problem

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  • Speech recognition method and device based on artificial intelligence
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  • Speech recognition method and device based on artificial intelligence

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Embodiment Construction

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0042] The artificial intelligence-based speech recognition method and device according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0043] At present, relatively mature speech recognition technologies are mostly applied in the near-field environment, that is, the distance between the user and the microphone is relatively short, and the recognition rate in this scenario is mostly relatively high. However, when the user is in a far-field environment, for example...

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Abstract

The invention provides a speech recognition method and device based on artificial intelligence. The method comprises steps of acquiring a microphone array and acquiring multiple paths of first speech signals; based on the WPE algorithm, removing reverberation signals in each path of the first speech signal so as to obtain each path of second speech signal, and passing each path of the second speech signal through an MVDR wave beam former to acquire one path of third speech signal; inputting the third speech signal into an adaptive blocking matrix module and an adaptive interference elimination module; carrying out noise extraction based on the third speech signal and each path of first speech signal in the adaptive blocking matrix module to obtain each path of first noise signal; and filtering each path of the first speech signal and carrying out superposition in the adaptive interference elimination module to obtain one path of second noise signal and subtracting the third speech signal from the second noise signal to obtain a target speech signal. According to the invention, by carrying out de-reverberation, enhancement and de-noising processing on the input signal, far-field speech recognition rate is improved.

Description

technical field [0001] The present invention relates to the technical field of speech recognition, and in particular, to a method and device for speech recognition based on artificial intelligence. Background technique [0002] Artificial intelligence (Artificial Intelligence), the English abbreviation is AI. It is a new technical science that studies and develops theories, methods, techniques and application systems for simulating, extending and expanding human intelligence. Artificial intelligence is a branch of computer science that attempts to understand the essence of intelligence and produce a new type of intelligent machine that can respond in a similar way to human intelligence. Research in this field includes robotics, speech recognition, image recognition, Natural language processing and expert systems, etc. Among them, the most important aspect of artificial intelligence is speech recognition technology. [0003] At present, relatively mature speech recognition...

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Application Information

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IPC IPC(8): G10L21/0208G10L21/0216G10L15/22
CPCG10L15/22G10L21/0208G10L21/0216G10L2021/02082G10L2021/02166G10L15/20G10L21/0232H04R1/406H04R3/005H04R2430/25G01S3/8083G10L25/84
Inventor 宋辉
Owner BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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