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Multistage voltage limiter design method for audio link architecture preprocessing

An audio link and design method technology, applied in the compression/expansion of digital/encoded signal volume, instruments, speech analysis, etc. improved effect

Inactive Publication Date: 2019-08-23
深圳市昂思科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the technical problem solved by the present invention is that when the audio signal is processed by the compression effector, when the input signal is too large, the frequency division point will be upturned, resulting in the problem of distortion and overflow of the middle and low frequency signals.

Method used

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  • Multistage voltage limiter design method for audio link architecture preprocessing
  • Multistage voltage limiter design method for audio link architecture preprocessing
  • Multistage voltage limiter design method for audio link architecture preprocessing

Examples

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Embodiment

[0030] Example: Processing with guitar audio files

[0031] A multi-segment compressor design method for audio chain architecture preprocessing, such as figure 1 shown, including the following steps:

[0032] (1) Read the audio data and save it as an x ​​array with a sampling frequency of 44100. The original audio data is as follows figure 2 As shown, it can be seen that there are large signals that may overflow, and the data is two channels of left and right channels, so the left channel data is processed first, and the right channel data is processed in the same way as the left channel, and the data is merged after processing;

[0033] (2) Divide the read data into frames, a total of 249 frames, and save it as a two-dimensional array y;

[0034] (3) Find the maximum value of each frame, if the data is a complex number, take the real part, and use the absolute value as a reference to compare the standard, and save the data in the Max array;

[0035] (4) Arrange the elemen...

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PUM

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Abstract

The invention discloses a multistage voltage limiter design method for audio link architecture preprocessing. A large signal is attenuated is by front-end audio preprocessing, when a multi-stage voltage limiter is designed, two cascade second order Butterworth filters are adopted to construct a fourth order Linquiz-Rayleigh smoothing frequency divider to realize amplitude response at the crossoverposition is -6dB , that is, bumps do not exist at a frequency division point, at the same time parameters of a compressor can be reasonably set according to signal characteristics of different frequency bands, so that during audio processing, the satisfactory sound effect is obtained. According to the multistage voltage limiter design method, during audio signal compressor processing, the chimneyeffect generated by great compression and limitation and low-frequency distortion and audible clicking caused rapid establishment time and recovery time are improved to a certain, so that during audio processing, the satisfactory sound effect is obtained.

Description

technical field [0001] The invention relates to the technical field of audio signal processing, in particular to a design method of a multi-stage compressor for audio link architecture preprocessing. Background technique [0002] One of the most misused or overused pieces of equipment in mixing processing is the compressor, which is worrisome given its place in current mixes. The compressor determines most of the sound in the current mix, it can make the sound louder, louder, more punchy, fuller, and more powerful, but if it is used incorrectly or overused, the compressor will suppress The dynamics of the signal. Dynamics is a crucial element in music and an important embodiment of musical expression, so it is necessary to find a more harmonious compressor processing method. [0003] The traditional dual-stage pressure limiter has been widely used in DSP back-end audio signal processing. It can effectively increase the volume and avoid the pumping phenomenon, but there are...

Claims

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Application Information

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IPC IPC(8): G10L21/007H03G7/00
CPCG10L21/007H03G7/007
Inventor 方韶劻卜玉婷林凤梅曾庆宁张洋韦莎丽刘帅何彦兴
Owner 深圳市昂思科技有限公司
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