Harmonic distortion reducing device and method

A technology of harmonic distortion and total harmonic distortion, which is applied in the field of communication, can solve problems such as inability to reduce, sound distortion, and poor texture, and achieve the effect of improving hearing experience, improving HIFI (HIFI) indicators, and reducing overall harmonic distortion

Active Publication Date: 2015-11-25
南通垣益新材料科技有限公司
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  • Abstract
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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

Method used

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  • Harmonic distortion reducing device and method
  • Harmonic distortion reducing device and method

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no. 2 example

[0083] Such as image 3 As shown, the second embodiment of the method for reducing total harmonic distortion of the present invention is proposed, and the method includes the following steps:

[0084] S11. When playing an audio file, pre-read audio data to be played.

[0085] Specifically, when the user plays an audio file, the terminal performs a pre-reading action on the audio file to be played, and performs a processing to reduce the total harmonic distortion before playing it.

[0086] Optionally, the terminal reads in advance the audio data of the entire audio file to be played, and plays the audio data only after the total harmonic distortion reduction processing is performed on the audio data.

[0087] Optionally, during the playback of the audio file, the terminal continuously pre-reads the next piece of audio data to be played in the audio file, and plays the audio data after processing to reduce the total harmonic distortion, and the processing and playback process ...

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Abstract

The invention discloses a total harmonic distortion reducing device and method. The device comprises a storage module which is used for storing a harmonic distortion database; a file reading module which is used for pre-reading audio data to be played when an audio file is played; a frequency component analysis module which is used for acquiring the main frequency component of fundamental wave of the audio data, inquiring the harmonic distortion database and prejudging amplitude and phase of harmonic distortion generated after the waveform of the main frequency component passes through the hardware circuit of a current terminal; and a reverse waveform adding module which is used for adding reverse waveform of harmonic distortion to the audio data according to the prejudged amplitude and phase of harmonic distortion and then transmitting the audio data to an audio playing module to be played. Therefore, an effect of reducing overall harmonic distortion is achieved by the method of adding the reverse waveform of harmonic distortion to a digital domain without increasing hardware cost or modifying the hardware circuit so that the high-fidelity index is enhanced and auditory feeling of users is enhanced.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/725G11B20/10H04M1/72433
Inventor 张圣杰
Owner 南通垣益新材料科技有限公司
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