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Sound mixing method and device of SBC code stream, medium and equipment

A code stream and sound mixing technology, which is applied in the field of SBC code stream mixing, can solve the problems of complex operation, large amount of operation, and reduced sound quality, so as to reduce the amount of operation, reduce the number of calculations, and reduce the total computing power requirements.

Active Publication Date: 2021-07-23
BEIJING BAIRUI INTERNET TECH CO LTD
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Problems solved by technology

However, in the SBC encoding and decoding process, the polyphase synthesis step and the polyphase decomposition step usually use fixed-point calculations, which will cause a loss of precision due to the limitation of the word length, thereby reducing the sound quality, and the polyphase synthesis step and the polyphase decomposition step are complicated and difficult to calculate. heavy computation

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  • Sound mixing method and device of SBC code stream, medium and equipment
  • Sound mixing method and device of SBC code stream, medium and equipment
  • Sound mixing method and device of SBC code stream, medium and equipment

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Embodiment Construction

[0023] 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.

[0024] 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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Abstract

The invention discloses a sound mixing method for SBC code streams, which comprises the following steps of respectively carrying out standard SBC decoding on multiple paths of SBC code streams until the standard SBC decoding is carried out after an APCM step and before a multi-phase synthesis step, and obtaining a reconstructed sub-band signal corresponding to each path of SBC code stream; and superposing the reconstructed sub-band signals corresponding to the multiple paths of SBC code streams to obtain a mixed sub-band signal. The application of the invention reduces the calculation times of the multiphase synthesis step in the audio mixing process, omits the operation of the multiphase decomposition step, effectively reduces the total computing power demand in the audio mixing server, reduces the operand in the audio mixing process, saves the power consumption, reduces the cost, and ensures that the voice quality is not reduced.

Description

technical field [0001] The present application relates to the technical field of Bluetooth audio coding and decoding, in particular to a method, device, medium and equipment for mixing SBC code streams. Background technique [0002] As a codec that classic Bluetooth must support, SBC is extremely widely used and is widely used in music, call and conference systems. There are usually two ways of mixing: centralized and distributed. Whether it is a distributed mixing system or a centralized mixing system, in order to support more mixing channels, it is necessary to configure a mixing server with stronger computing power, so that Increased cost of conferencing equipment. Moreover, no matter whether it is distributed mixing or centralized mixing for multiple SBC streams, multiple polyphase synthesis is involved, and centralized mixing also involves a polyphase decomposition. However, in the SBC encoding and decoding process, the polyphase synthesis step and the polyphase decom...

Claims

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Application Information

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IPC IPC(8): G10L19/02G10L19/032
CPCG10L19/0204G10L19/032
Inventor 李强王尧叶东翔朱勇
Owner BEIJING BAIRUI INTERNET TECH CO LTD
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