Method and system for picking up sound based on microphone array

Abstract

The present invention relates to a method and system for picking up sound based on a microphone array, comprising: step 1, using a microphone array to pick up and output one of multiple voice signals for voice activation detection, and judging whether a voice activation signal occurs, and if so, performing steps 2. If not, repeat step 1; step 2, perform sound source localization on multiple voice signals, and obtain the sound source localization direction; step 3, perform voice enhancement on the voice signal in the sound source localization direction, and obtain the enhanced voice signal; step 4. Perform voice wake-up detection on the enhanced voice signal to determine whether voice wake-up is detected. If so, perform step 5, otherwise, repeat step 1; step 5, the microphone array picks up and outputs multiple voice signals; The voice signal of one channel is processed into one channel as the final picked-up sound output. The invention can better pick up the voice signal in the far-field environment, especially in the high-noise environment, and can pick up the voice accurately, and provides an excellent solution for long-distance voice control.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a microphone array-based sound pickup method and system. Background technique [0002] Recording high-quality speech signals plays a vital role in speech analysis methods such as speech recognition. The traditional single-microphone recording method has a sharp drop in recording quality in a long-distance high-noise environment, which greatly limits the application scenarios of speech analysis methods. Therefore, applications such as voice input methods and voice search on mobile phones must ensure that the distance between the speaker and the microphone of the mobile phone is close enough. This kind of sound pickup environment is classified as near-field sound pickup. [0003] The use of microphone array recording can use multi-channel speech signal data for post-processing, thereby suppressing noise and enhancing the target speech signal. Therefore, in the far-field pickup, t...

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