Bluetooth audio howling suppression method and device, medium and Bluetooth equipment
A Bluetooth audio and audio technology, applied in the field of audio codec, can solve the problems of complex system, unfavorable implementation, large amount of calculation, etc., and achieve the effect of reducing system complexity, improving user experience, and reducing system delay
Active Publication Date: 2022-01-11
BEIJING BAIRUI INTERNET TECH CO LTD
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In the existing technology, when suppressing howling based on deep learning, it is necessary to convert the audio data to the frequency domain, or use other additional hardware devices, the system is complex and the amount of calculation is large, which is not conducive to specific implementation
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[0015] The preferred embodiments of the application will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the application can be more easily understood by those skilled in the art, so as to define the protection scope of the application more clearly.
[0016] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elemen...
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The invention discloses a Bluetooth audio howling suppression method and device, a medium and Bluetooth equipment, and belongs to the technical field of audio coding and decoding. The method mainly comprises the steps of performing offline training on a neural network model by using a training set comprising a large number of pure audio spectrum coefficients and corresponding howling-containing audio spectrum coefficients to obtain a howling suppression neural network model; in the Bluetooth audio coding and / or decoding process, obtaining a current frame feature vector by using a current frame audio spectrum coefficient obtained through discrete cosine transform; and taking the current frame feature vector as input, and using a howling suppression neural network model to output a howling-free current frame audio spectrum coefficient or a howling-suppressed current frame audio spectrum coefficient. According to the invention, the system complexity can be reduced, the calculation amount can be reduced, the system delay can be reduced and the user experience can be improved while a relatively good howling suppression effect is achieved.
Description
technical field [0001] The present application relates to the technical field of audio coding and decoding, and in particular to a Bluetooth audio howling suppression method, device, medium and Bluetooth equipment. Background technique [0002] Bluetooth audio has many typical application scenarios, such as Bluetooth-based karaoke, Bluetooth-based wireless microphone / speaker, etc. From the perspective of data flow, it can be abstracted as figure 1 As shown, it can be seen that there is a feedback path from the speaker to the microphone in this figure (as shown by the dotted arrow). This closed-loop state makes the system likely to become unstable when the gain increases to a certain state, resulting in self-excited Oscillation whistles. In order to avoid howling, howling can be suppressed based on deep learning. In the existing technology, when suppressing howling based on deep learning, it is necessary to convert the audio data to the frequency domain, or use other additi...
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Login to View More IPC IPC(8): G10L19/02G10L21/02G10L21/0232G10L25/30
CPCG10L19/0212G10L21/0232G10L25/30
Inventor 李强朱勇王尧叶东翔
Owner BEIJING BAIRUI INTERNET TECH CO LTD