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Speech Enhancement Method Based on Distributed Microphone Array Network

A microphone array and voice enhancement technology, applied in voice analysis, instruments, etc., can solve the problems of scalability and space constraints

Active Publication Date: 2019-02-15
胡旻波
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, traditional microphone array-based speech enhancement algorithms are limited by the scalability and space of the microphone array itself

Method used

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  • Speech Enhancement Method Based on Distributed Microphone Array Network
  • Speech Enhancement Method Based on Distributed Microphone Array Network
  • Speech Enhancement Method Based on Distributed Microphone Array Network

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0097] figure 1 is a flowchart of the present invention.

[0098] Core content among the present invention mainly comprises three major parts: (1), the establishment of the Ad-hoc network shown in step a and the initialization of audio frequency collection module shown in step b; The single-node speech enhancement of nano-filter; (3) multi-node iterative speech enhancement based on multi-channel Wiener filter shown in step f.

[0099] like figure 1 Shown, the present invention specifically comprises the following steps:

[0100] (1), Ad-hoc network establishment and initialization

[0101] Step a, setting up multiple microphone arrays, and establishing a distributed microphone array network based on the Ad-hoc network composed of multiple microphone arrays; any two network nodes can communicate with each other.

[0102] Ad-hoc network is also called temporary self-organizing network. Since the network does not require additional basic network facilities and is based on co...

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Abstract

The invention discloses a voice enhancement device based on a distributed microphone array network. The method comprises the steps that the distributed microphone array network based on an Ad-hoc network is built; sampling rate synchronization is carried out on network nodes; framing is carried out on signals of the nodes; a multi-channel wiener filter is carried out at each node for voice enhancement; the enhanced voice signals are transmitted to all other nodes of the network; at each node, according to multi-channel microphone array observation signals of the current node and single-channel enhanced voice signals of the other nodes, the multi-channel wiener filters are adopted again for voice enhancement, and the updated single-channel enhanced voice signals of the current node are obtained. Isolated microphone arrays are connected through the wireless communication network to form a microphone array network, so that the voice enhancement effect of a single node can be improved.

Description

technical field [0001] The invention relates to a speech enhancement method, in particular to a speech enhancement method based on a distributed microphone array network. Background technique [0002] Our environment is often accompanied by various noises, such as the sound of TVs and fans in the room, the sound of the engine in the car, the sound of cars running on the road, and the babble noise in the coffee shop, etc. Noise negatively affects many speech processing systems. For example, in voice communication, noise will interfere or even cover the other party's voice, reducing the quality of the call; in a speech recognition system, noise will reduce the speech recognition rate, or even completely disable the recognition system. Therefore, it is of great significance to estimate the pure speech based on the observed noisy speech signal, which we call speech enhancement. [0003] Traditional speech enhancement algorithms use the observation signal of a microphone for pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0208
Inventor 胡旻波
Owner 胡旻波
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