Method, apparatus and device for audio dynamic range compression

Abstract

The invention is suitable for the field of audio signal processing, and provides a method, an apparatus and a device for audio dynamic range compression. The method comprises the following steps of: regulating a peak value and a mean value of a current audio processing frame by a preset control volume so as to obtain a modified peak value and a modified mean value; when the modified peak value or the modified mean value is not in a target dynamic range, attenuating or progressively increasing the preset control volume for many times to get the modified control volume until realizing that the modified peak value and the modified mean value can be regulated to a range meeting a regulation termination condition by the modified control volume; and regulating the modified peak value and the modified mean value to the range meeting the regulation terminal condition by the modified control volume. In the method, the peak value and the mean value of an audio signal are taken as the detection quantity, and by dynamically regulating the control volume of the audio signal and performing audio dynamic range compression on the audio signal, the loudness and the tone quality of the sound are guaranteed well.

Description

technical field [0001] The invention belongs to the field of audio signal processing, in particular to an audio dynamic range compression method, device and equipment. Background technique [0002] The dynamic range of an audio signal refers to the strength difference between the largest undistorted audio signal and the smallest audio signal, usually expressed in decibels (dB). The greater the dynamic range of an audio signal, the louder its sound will be . The dynamic range of an audio amplifier refers to the strength difference between the maximum undistorted audio signal that the audio amplifier can output and the noise of the audio amplifier itself. To achieve good sound performance, the audio dynamic range of the audio amplifier must be greater than the audio it plays. The dynamic range of the signal. [0003] However, for portable playback devices, due to the limitation of speaker size and power supply voltage, its own dynamic range is small, so playing audio signals...

AI Technical Summary

Problems solved by technology

[0003] However, for portable playback devices, due to the limitation of speaker size and power supply voltage, its own dynamic range is small, so playing audio signals with excessive dynamic range will cause distortion, and when the battery power changes or receives different inputs When the sound source of the range is large, the relatively stable sound loudness and sound quality cannot be guaranteed.

[0004] At the same time, after the sound effect equalization processing is performed on the audio signal, it is easy to enlarge the dynamic range of the audio signal and exceed the dynamic range of the audio amplifier. Cause crackling noise, which seriously affects the sound quality

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