A Bluetooth audio decoding method, device, medium and equipment for hearing protection
A Bluetooth audio and decoding method technology, applied in the field of devices, Bluetooth audio decoding methods, media and equipment, can solve problems such as limited processor accuracy, heavy headset burden, and reduced user experience, so as to reduce computing requirements and improve user experience , the effect of protecting human hearing
Active Publication Date: 2022-01-18
BEIJING BAIRUI INTERNET TECH CO LTD
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But its disadvantage is that its hearing protection module is based on Fourier transform, inverse Fourier transform and overlap-add method. The inherent characteristics of this method will introduce time delay. For many Bluetooth applications, it is particularly sensitive to time delay. , the increase in delay will reduce the user experience; and the Fourier transform and its inverse transform have a large amount of calculation, which is a heavy burden for Bluetooth receiving modules with limited computing power and power consumption, especially earphones
In addition, Fourier transform, inverse Fourier transform and overlap-add correlation operations are limited by the accuracy of the processor, even if the energy of the sub-band signal does not exceed the threshold, the above processing will cause the loss of sound quality
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[0021] 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.
[0022] 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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This application discloses a Bluetooth audio decoding method, device, medium and equipment for hearing protection, belonging to the field of audio codec, which includes: partially decoding Bluetooth audio to obtain the current frame audio spectral coefficients including multiple subbands and each subband The sub-band gain; calculate the original value of the audio signal energy corresponding to each sub-band according to the spectral coefficient of each sub-band and the corresponding sub-band gain, and perform the sub-band gain of the sub-band whose original energy value of the audio signal is greater than the predetermined safety threshold Adjust the safety sub-band gain so that the audio signal energy adjustment value calculated according to the safety sub-band gain and the spectral coefficient of the corresponding sub-band is not greater than the predetermined safety threshold; and, using the safety sub-band gain and the spectrum of the corresponding sub-band Continue to the decoding steps of Bluetooth audio. Compared with the prior art, the present application can protect human hearing on the premise of reducing computing requirements, power consumption, time delay and sound quality loss, and improves user experience.
Description
technical field [0001] The present application relates to the technical field of audio coding and decoding, and in particular to a Bluetooth audio decoding method, device, medium and equipment for hearing protection. Background technique [0002] More and more consumers like to use Bluetooth devices to listen to audio. At present, some devices (such as Bluetooth headsets) will monitor the full-band energy of the audio. If it is greater than the human hearing safety threshold, the full-band energy will be reduced to a safe value. In some cases, although the overall volume of the entire frequency band does not exceed the safe value, the volume of certain frequency bands, such as the high frequency band, exceeds the safe threshold, which will still cause hearing damage to the human ear. [0003] In view of the above problems, in the prior art, after windowing and Fourier transforming the audio data to obtain the sub-band signal, the energy of the sub-band is calculated and jud...
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IPC IPC(8): G10L19/00
CPCG10L19/00
Inventor 李强朱勇王尧叶东翔
Owner BEIJING BAIRUI INTERNET TECH CO LTD