Apparatus and method for reducing harmonic distortion

Abstract

The invention discloses a device and method for reducing total harmonic distortion. The device includes: a storage module for storing a harmonic distortion database; a file reading module for pre-reading the audio file to be played when playing an audio file audio data; the frequency component analysis module is used to obtain the main frequency components of the fundamental wave of the audio data, query the harmonic distortion database, and predict the amplitude and amplitude of the harmonic distortion generated after the waveform of the main frequency components passes through the hardware circuit of the terminal. phase; the reverse waveform adding module is used to add the reverse waveform of harmonic distortion to the audio data according to the amplitude and phase of the predicted harmonic distortion, and then transmit it to the audio playback module for playback. Therefore, on the premise of not increasing the hardware cost and modifying the hardware circuit, by adding the reverse waveform of the harmonic distortion in the digital domain, the effect of reducing the overall harmonic distortion is achieved, the high-fidelity index is improved, and the user experience is enhanced. auditory experience.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a device and method for reducing harmonic distortion. Background technique [0002] At present, after the hardware circuit design of the mobile terminal is completed, the total harmonic distortion (THD) value of its audio subsystem is also fixed and cannot be lowered. Harmonic distortion is a major factor that interferes with the user's hearing experience. On some low-end platforms, due to the limitation of the quality of the audio decoding chip itself, the value of total harmonic distortion is relatively high, resulting in serious distortion of the terminal output sound and poor quality. It cannot meet the increasing high-fidelity needs of users and affect the user's hearing experience. Contents of the invention [0003] The main purpose of the present invention is to provide a device and method for reducing harmonic distortion, aiming at reducing the total harmonic dis...

AI Technical Summary

Problems solved by technology

[0002] At present, after the hardware circuit design of the mobile terminal is completed, the total harmonic distortion (THD) value of the audio subsystem is also fixed and cannot be reduced.

Harmonic distortion is a major factor that interferes with the user's hearing experience. On some low-end platforms, due to the limitation of the quality of the audio decoding chip itself, the value of total harmonic distortion is relatively high, resulting in serious distortion of the sound output by the terminal and poor texture. Can not meet the growing high-fidelity needs of users, affecting the user's hearing experience

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