Dual-microphone based speech enhancement device and method

Abstract

The invention provides a dual-microphone based speech enhancement device, comprising a digital microphone array module and a signal processing integrated chip. The signal processing integrated chip is electrically connected with the digital microphone array module and is internally provided with a pulse density modulation decoder module, a directivity forming module, a speech enhancement processing module and an output module. The invention also provides a speech enhancement method based on the dual-microphone based speech enhancement device. Compared with the related technology, the dual-microphone based speech enhancement device has high level of integration because a decoding chip, a de-noising chip and the like are integrated into one signal processing chip. The two digital microphones are characterized by sound inlet in different directions, and the directivity formation is adopted so that the background noise outside wave beams is inhibited. The speech enhancement method is simple, and the development cost is saved.

Description

【Technical field】 [0001] The invention relates to a speech enhancement device and method, in particular to a dual-microphone-based speech enhancement device and method. 【Background technique】 [0002] With the development of wireless communication, there are more and more mobile phone users around the world. The requirements of users for mobile phones are not only satisfied with calls, but also to be able to provide high-quality call effects. Especially the current development of mobile multimedia technology, the mobile phone Call quality is even more important. [0003] Due to the existence of a large amount of environmental noise, the signal-to-noise ratio of the voice signals collected by the microphones of mobile phones and other communication devices is generally not high enough. Especially in high-noise environments such as street cars, it is necessary to increase the volume to make the other party hear clearly. Therefore, it is necessary to improve the signal-to-nois...

AI Technical Summary

Problems solved by technology

The noise reduction effect of the single-channel speech enhancement method in the related art is limited, and it will cause great distortion to the speech, while the dual-microphone speech enhancement device can effectively improve the signal-to-noise ratio. The dual-microphone speech enhancement device in the related art includes a microphone and a variety of signal processing chip

[0004] However, various signal processing chips in the dual-microphone speech enhancement device of the related art are separately arranged, and this structure makes the speech enhancement method of the dual-microphone speech enhancement device of the related art relatively complicated, and the development cost is high

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