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Bluetooth audio howling detection suppression method and device, medium and Bluetooth equipment

A technology of bluetooth audio and suppression devices, which is applied in the field of audio codec, can solve the problems of large amount of calculation, etc., and achieve the effects of avoiding time-frequency conversion, reducing system delay, and high detection accuracy

Active Publication Date: 2021-11-30
BEIJING BAIRUI INTERNET TECH CO LTD
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AI Technical Summary

Problems solved by technology

In the existing solutions, the method based on the frequency domain is more accurate and widely used, but it needs to complete the time-frequency transformation, and then detect the howling based on the features obtained in the frequency domain, which requires a large amount of calculation.

Method used

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  • Bluetooth audio howling detection suppression method and device, medium and Bluetooth equipment
  • Bluetooth audio howling detection suppression method and device, medium and Bluetooth equipment
  • Bluetooth audio howling detection suppression method and device, medium and Bluetooth equipment

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Embodiment Construction

[0018] 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.

[0019] 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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Abstract

The invention discloses a Bluetooth audio howling detection suppression method and device, a medium and Bluetooth equipment and belongs to the technical field of audio coding and decoding. The method comprises the following steps of calculating to obtain a pseudo-spectral coefficient corresponding to each spectral coefficient by using each spectral coefficient in current frame audio spectral coefficients obtained through discrete cosine transform in a Bluetooth audio coding and / or decoding process and two spectral coefficients adjacent to the spectral coefficient; calculating a sub-band energy entropy by using all pseudo-spectral coefficients corresponding to the current frame audio spectral coefficient to obtain a pseudo-spectral entropy of the current frame audio spectral coefficient; and judging whether the current frame audio spectrum coefficient contains howling or not by using the pseudo spectrum entropy of the current frame audio spectrum coefficient and a preset spectrum entropy threshold value. The howling detection method and device can avoid time-frequency transformation required by howling detection in the prior art, save the operand and reduce the system time delay.

Description

technical field [0001] The present invention relates to the technical field of audio coding and decoding, in particular to a Bluetooth audio howling detection and suppression method, device, medium and Bluetooth equipment. Background technique [0002] Among the current mainstream Bluetooth audio encoders, "Subband Coding (SBC)" is the most widely used and must be supported by all Bluetooth audio devices, but the sound quality is average; "Advanced Audio Coding (AAC-LC)" has lower sound quality Good and widely used, many mainstream mobile phones support it, but it takes up a lot of memory and has high computational complexity. Many Bluetooth devices are based on embedded platforms, with limited battery capacity, poor processor computing power and limited memory; " Qualcomm Bluetooth Audio Coding Technology (aptX series)" and "Sony Bluetooth Audio Coding Technology (LDAC)" have better sound quality but high bit rate, and they are exclusive technologies of Qualcomm and Sony re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208
CPCG10L21/0208G10L2021/02082
Inventor 李强朱勇王尧叶东翔
Owner BEIJING BAIRUI INTERNET TECH CO LTD
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