Audio frequency band processing method and system

Abstract

The embodiment of the invention discloses an audio frequency band processing method and system, being capable of improving audio performances which can be perceived by a user without adding algorithm complexity and power consumption. According to the embodiment, the audio frequency band processing method comprises the steps of: determining a loudness value dynamic range of a to-be-processed audio signal; selecting a corresponding human ear equal-loudness contour based on the loudness value dynamic range of the audio signal; determining a frequency range of the audio signal; determining a weight value of each frequency point within the frequency range of the audio signal based on the selected human ear equal-loudness contour; and dividing the audio signal into a plurality of audio frequency sub-band signals based on the weight value of each frequency point. The embodiment of the invention also provides an audio frequency band processing system. The embodiment of the invention can improve audio performances which can be perceived by the user without adding the algorithm complexity and the power consumption.

Description

technical field [0001] The invention relates to the field of data processing, in particular to an audio frequency band processing method and system. Background technique [0002] In a large number of digital audio equipment applications, it is necessary to perform audio signal processing on digital audio signals to improve audio quality, such as noise suppression, audio automatic gain control, echo cancellation, and the like. [0003] From the perspective of time domain, the audio signal amplitude can be adjusted in the signal time domain, and the time compression and expansion of the voice signal can also be performed on the time axis; from the perspective of frequency, it is usually necessary to divide the audio frequency band into multiple sub-bands , and then perform digital signal processing on the audio signals of each sub-band respectively. [0004] In the audio processing process, it can generally be considered that the more sub-bands are divided, the more accurate ...

AI Technical Summary

Problems solved by technology

[0004] In the audio processing process, it can generally be considered that the more sub-bands are divided, the more accurate the audio signal processing will be. Of course, this will also have a negative impact, that is, it will increase the complexity of the algorithm and occupy more processor system resources. , increase system power consumption

[0005] Especially for mobile terminal equipment, the system resources and system power consumption of the processor are very sensitive, so the division of audio frequency sub-bands is very particular. Too few sub-frequency bands will reduce the accuracy of audio signal processing, and too many sub-frequency bands will reduce the accuracy of audio signal processing. It will increase system overhead and system power consumption, and the solutions in the prior art often cannot take both aspects into consideration

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