Sound mixing processing method, device and intelligent equipment
A processing method and technology of a processing device, which are applied in speech analysis, instruments, etc., to achieve the effect of maintaining the amount of information, avoiding the shortcomings of large-area saturated areas, and low computational complexity
Active Publication Date: 2012-07-25
WONDERSHARE TECH CO LTD
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[0012] The technical problem to be solved by the present invention is to provide a sound mixing processing method, device and intelligent equipment, which are simple to implement, low in computational complexity, and can effectively avoid problems such as peak overflow and reduction of sounds from various channels.
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[0032] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
[0033] In the embodiment of the present invention, when performing mixing processing on at least two audio signals, a variable attenuation factor is introduced, which is multiplied by the sum of the sample values of each audio signal after weighting processing, and when the synthesized sample value of the product overflows , output the audio with the maximum sampling value or the minimum sampling value, and at the same time properly reduce the attenuation factor, so that at the next sampling point, the new attenuation factor is multiplied by the sum of the weighted audio signal sampling values of each channel, which can reduce the overflow possibility. In addition, in order to prevent the audio signal from being attenuated unnecessarily, the attenuation factor can also be appropriately increased. Therefore, the audio mixing processing method in the ...
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The invention provides a sound mixing processing method, a sound mixing processing device and sound mixing processing intelligent equipment. The sound mixing processing method comprises the following steps of: respectively weighting a sampling value of each voice frequency signal which needs sound mixing by a preset weighting coefficient, so as to obtain weighting sampling values; summating the weighting sampling values, and multiplying by a current attenuation factor, so as to obtain a synthetic intermediate value; judging whether the synthetic intermediate value overflows or not; if the synthetic intermediate value overflows, outputting voice frequency by a maximum sampling value or a minimum sampling value, and reducing the current attenuation factor to be taken as a next sampled attenuation factor; if the synthetic intermediate value does not overflow, outputting the voice frequency by the synthetic intermediate value; and if the current attenuation factor is less than 1, increasing the current attenuation factor to be taken as the sampled attenuation factor. The method, the device and the equipment are easy to realize, low in computation complexity, and smoother to transit the voice frequency signals, so that the original information content can be furthest kept.
Description
technical field [0001] The present invention relates to the field of audio signal processing, in particular to a sound mixing processing method, device and intelligent equipment. Background technique [0002] In audio editing, playback software, and various multimedia application software, the situation of mixing two or more signals into one output is used, which is called sound mixing. In voip, sound mixing is also the most basic and necessary algorithm, but due to the complex application scenarios, the combination of excellent sound mixing effect and fast implementation speed is still a difficult point. [0003] The existing mixing processing methods can be divided into two categories: (1) direct saturation addition; (2) addition and averaging. [0004] Direct saturation addition can be simply considered as a process in which several sounds are roughly mixed together without any processing, and then saturated. As shown in formula (3.1). [0005] (Formula 3.1) [000...
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Inventor 赵伟峰
Owner WONDERSHARE TECH CO LTD