A dynamic range control method and system for stable gain adjustment

A dynamic range control and stable technology, which is applied in voice analysis, instruments, etc., can solve the problems of voice signal sound quality damage, large gain fluctuation, etc., to achieve accurate results and ensure stable changes

Active Publication Date: 2022-03-01
NANJING INST OF TECH
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Problems solved by technology

[0006] Technical purpose: In order to solve the problem that the classic dynamic range control algorithm has large gain fluctuations, which leads to the damage of the sound quality of the voice signal, the present invention provides a dynamic range control algorithm and system with stable gain adjustment, which can control the sound signal without distortion. The amplitude is controlled, and the amplitude of large signals can be well limited

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  • A dynamic range control method and system for stable gain adjustment
  • A dynamic range control method and system for stable gain adjustment
  • A dynamic range control method and system for stable gain adjustment

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Embodiment Construction

[0063] Such as figure 1 As shown, a dynamic range control algorithm for smooth gain adjustment of the present invention includes the following steps.

[0064] Step A, designing a variable gain curve that can be adjusted according to actual needs;

[0065] Step B, for each point of a frame signal, determine the real-time gain Gr according to the amplitude of the input voice signal and the gain curve, compare the relationship between the real-time gain Gr and the expected gain Ge, and find the expected gain change rate Re, according to the expected gain change The value of the expected gain is updated at a rate;

[0066] Step C, for each point of a frame signal, update the value of the actual gain according to the actual gain change rate Ra; according to the obtained actual gain, do a denormalization process, at this time you can choose to multiply it by a main gain to get the final The gain g involved in the calculation; the main gain is a parameter related to the gain curve;...

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Abstract

The invention discloses a dynamic range control algorithm and system for stable gain adjustment, and relates to the technical field of audio signal processing. According to the needs of the actual dynamic range control degree, relevant parameters of the gain curve are given, and the parameters include the starting point of the transition section, the transition section The bandwidth and the slope of the compression section, by calculating the unknown parameters of the transition section curve equation, and then get the entire gain curve; according to the amplitude of the input voice signal and the gain curve to determine the real-time gain, through the smooth adjustment of the expected gain and actual gain, Make sure that the gain involved in the operation changes smoothly. The method of the present invention further ensures that the gain can keep up with the needs of the current point data for the gain through data buffering, so that the result is accurate. Compared with the classic DRC algorithm, the outstanding advantage of the method used in the present invention is that it can process the original audio signal with less distortion. Scaling will not affect subsequent functional modules.

Description

technical field [0001] The invention relates to the technical control field of sound signal processing, in particular to a dynamic range control algorithm and system for stable gain adjustment. Background technique [0002] Dynamic range control technology is a technology that artificially compresses large-amplitude signals before using sound signals to avoid clipping distortion, and at the same time amplifies small-amplitude signals to make them easily perceived by the human ear. In the period when analog circuits were prevalent, the adjustment of the dynamic range of the voice signal was realized by dividing the current into two lines for amplitude modulation and rectification respectively. [0003] In the 1990s, the wide application of digital signal processing technology made the dynamic range controller also begin to go digital. Dynamic range control covers various dynamic processors such as compressor, limiter, expander, noise gate, etc., which can be used separately ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/04G10L21/0316
CPCG10L21/04G10L21/0316
Inventor 王青云梁瑞宇余兵唐闺臣包永强谢跃
Owner NANJING INST OF TECH
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