Equal-loudness sound mixing method and device
A technology of equal loudness and sound mixing, which is applied in the field of loudness mixing methods and devices, and can solve problems such as different loudness, poor user experience, and impact on conference effects
Active Publication Date: 2021-06-18
深圳百瑞互联技术有限公司
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Problems solved by technology
There are often differences in the loudness of multiple audio signals in a conference call. When these audio signals with loudness differences are mixed, the mixed audio signals will also have loudness differences. This phenomenon leads to the loudness of each channel heard by the user. Different, it brings bad user experience to users and affects the effect of the meeting
[0003] When the prior art adjusts audio signals with different loudness, such as figure 1 As shown, as CN201610939143.8, it is necessary to convert the voice signal to the frequency domain through DFT (Discrete Fourier Transform) to calculate the loudness, and calculate the weight of each voice according to the ratio of the loudness of each voice signal to the total loudness, based on this The weight adjusts the voice signal to be mixed, and finally obtains the voices of each channel with equal loudness, and then mixes the sound. This method has a complex algorithm and a large amount of calculation
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[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0020] 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 a...
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The invention discloses an equal-loudness sound mixing method and device, and belongs to the technical field of audio coding and decoding and speech synthesis. The method mainly comprises the following steps: respectively carrying out a partial LC3 decoding step on multiple paths of LC3 audio code streams to obtain a current frame audio spectrum coefficient of each path of audio code stream; calculating the current frame loudness of all or part of the current frame audio spectrum coefficients through calculation, and calculating the weight of the current frame audio spectrum coefficient corresponding to each current frame loudness through calculation according to all the current frame loudness; adjusting the corresponding current frame audio spectrum coefficient according to the weight of the current frame audio spectrum coefficient corresponding to each current frame loudness, and mixing all the adjusted current frame audio spectrum coefficients to obtain a current frame mixed audio spectrum coefficient. According to the invention, the operand during sound mixing can be reduced, meanwhile, equal-loudness sound mixing is realized, and better experience is provided for teleconferences.
Description
technical field [0001] The invention relates to the technical fields of audio codec, bluetooth audio, and speech synthesis, and in particular to an equal-loudness mixing method and device. Background technique [0002] With the large-scale commercial use of the LC3 codec, it has been widely used in conference calls. There are often differences in the loudness of multiple audio signals in a conference call. When these audio signals with loudness differences are mixed, the mixed audio signals will also have loudness differences. This phenomenon leads to the loudness of each channel heard by the user. Different, it brings bad user experience to users and affects the effect of the meeting. [0003] When the prior art adjusts audio signals with different loudness, such as figure 1 As shown, as CN201610939143.8, it is necessary to convert the voice signal to the frequency domain through DFT (Discrete Fourier Transform) to calculate the loudness, and calculate the weight of each ...
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IPC IPC(8): H04M3/56G10L19/02G10L25/03
CPCG10L19/02G10L25/03H04M3/568
Inventor 李强王尧叶东翔朱勇
Owner 深圳百瑞互联技术有限公司