Audio signal processing method and device and storage medium
An audio signal processing and audio signal technology, applied in the field of signal processing, can solve the problems of increased cost of microphone products, sensitivity to microphone position errors, and large performance impact.
Active Publication Date: 2020-07-17
BEIJING XIAOMI PINECONE ELECTRONICS CO LTD
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Problems solved by technology
However, the beamforming technology of multiple microphones is sensitive to microphone position errors and has a great impact on performance. In addition, the increase in the number of microphones will also lead to higher product costs.
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[0066] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0067] figure 1 It is a flowchart of a method for processing an audio signal according to an exemplary embodiment, such as figure 1 shown, including the following steps:
[0068] Step S101, using at least two microphones to acquire audio signals from at least two sound sources respectively, so as to obtain original noisy signals of the at least two microphones;
[0069] Step S102. For each fr...
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The invention relates to an audio signal processing method and device and a storage medium. The method comprises the steps of: acquiring audio signals sent by at least two sound sources respectively by at least two microphones so as to acquire original noisy signals of the at least two microphones respectively; for each frame in the time domain, acquiring respective frequency domain estimation signals of the at least two sound sources according to the respective original noisy signals of the at least two microphones; dividing a predetermined frequency band range into a plurality of frequency sub-bands, wherein each frequency sub-band comprises a plurality of frequency points, and any two adjacent frequency sub-bands have an overlapping frequency band; determining a weighting coefficient ofeach frequency point contained in the frequency sub-bands according to the frequency domain estimation signal of each frequency point in each frequency sub-band; determining a separation matrix of each frequency point according to the weighting coefficient; and based on the separation matrix and the original noisy signal, acquiring audio signals emitted by the at least two sound sources respectively. Through the technical scheme of the embodiment of the invention, voice damage can be reduced, and the voice signal quality is improved.
Description
technical field [0001] The present disclosure relates to the field of signal processing, and in particular, to an audio signal processing method and device, and a storage medium. Background technique [0002] In related technologies, smart product equipment mostly uses microphone arrays to pick up sound, and uses microphone beamforming technology to improve the quality of voice signal processing, so as to improve the voice recognition rate in real environments. However, the beamforming technology of multiple microphones is sensitive to microphone position errors and has a great impact on performance. In addition, the increase in the number of microphones will also lead to increased product costs. [0003] Therefore, at present, more and more smart product devices are equipped with only two microphones; two microphones often use blind source separation technology that is completely different from multiple microphone beamforming technology to enhance speech, and how to make th...
Claims
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IPC IPC(8): G10L21/0216G10L21/0224G10L21/0232G10L21/0272
CPCG10L21/0216G10L21/0224G10L21/0232G10L21/0272G10L2021/02165G10L2021/02166
Inventor 侯海宁
Owner BEIJING XIAOMI PINECONE ELECTRONICS CO LTD