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Multi-channel sound mixing method and device

A multi-channel and multi-channel technology, applied in the field of computer data processing, can solve problems such as the distortion of the mixing algorithm

Active Publication Date: 2018-07-06
世邦通信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a multi-channel sound mixing method and device to alleviate the technical problem of serious distortion in the existing sound mixing algorithm

Method used

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Embodiment 1

[0072] A multi-channel mixing method, refer to figure 1 , the method includes:

[0073] S101. Obtain a multi-channel signal for transmitting the current frame;

[0074] In the embodiment of the present invention, each frame of audio signal is composed of audio information transmitted by multi-channel signals.

[0075] S102. Expand and sum the multi-channel signals to obtain the sum signal of the current frame;

[0076] After the multi-channel signal is obtained, the signal is not attenuated, but the multi-channel signal is directly expanded and summed, so that the signal loudness will not be reduced. In addition, the expansion process can increase the storage space of the signal. Overflow will occur, so that the loudness of the sum signal of the current frame obtained is close to the real value, and at the same time, no distortion will occur due to overflow.

[0077] S103. Acquire frame data to be analyzed, wherein the frame data to be analyzed is obtained by splicing the s...

Embodiment 2

[0150] The embodiment of the present invention provides a multi-channel sound mixing device, refer to Figure 5 , the device consists of:

[0151] The first acquisition module 11 is configured to acquire a multi-channel signal for transmitting the current frame;

[0152] The expansion and summation module 12 is used to expand and sum the multichannel channel signals to obtain the sum signal of the current frame;

[0153] The second acquisition module 13 is configured to acquire frame data to be analyzed, wherein the frame data to be analyzed is obtained by splicing the sum signal of the previous frame and the sum signal of the current frame;

[0154] The clipping module 14 is used to clip the frame data to be analyzed in a clipping manner to obtain sampled values ​​after clipping;

[0155] The output module 15 is configured to output the data of the first N sampling points of the limited sampling value to obtain the target audio signal.

[0156] In the embodiment of the pre...

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Abstract

The invention provides a multichannel sound mixing method and apparatus. The method comprises the following steps: obtaining multiple paths of channel signals used for transmitting a current frame; performing volume expansion summation on the multiple paths of channel signals to obtain a sum signal of the current frame; obtaining to-be-analyzed frame data; limiting the amplitude of the to-be-analyzed frame data in an amplitude limiting manner to obtain a sampling value after amplitude limiting; and outputting the data of N sampling points in front of the sampling value after amplitude limiting to obtain a target audio signal. In the multichannel sound mixing method provided by the invention, the sound mixing is performed by combining the volume expansion summation with the amplitude limiting, so that the sound quality of the obtained target audio signal is better and is more real, and the technical problem of serious distortion of sound mixing in the traditional sound mixing method is relieved.

Description

technical field [0001] The invention relates to the technical field of computer data processing, in particular to a multi-channel sound mixing method and device. Background technique [0002] Multi-channel mixing algorithms are typically used in conference systems and broadcasting systems. In the conference system, when many people are speaking, it is necessary to mix the audio signals of all the speakers and send them to the conference participants; while in the broadcasting system, background music is played, and sometimes voice messages and notifications need to be broadcast. The signal is mixed. [0003] A good mixing algorithm needs to meet two basic conditions: basically maintain the loudness of the original signals, without causing obvious loudness fluctuations; the mixed signal cannot overflow, and cannot produce obvious distortion due to signal processing. [0004] There are many kinds of mixing algorithms, and the following three are mainly used: one is the avera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/12
CPCH04R3/12H04R2430/00
Inventor 仇波
Owner 世邦通信股份有限公司
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