Method and device for strengthening subwoofer signals

Abstract

The invention discloses a method and device for strengthening subwoofer signals. Left input sound track signals and right input sound track signals are combined and then input into a low-pass filter for low-pass filtering, low-frequency-band signals are extracted and input into a harmonic generation module, the generated harmonic signals of each time are fed into a band-pass filter to be controlled, then the harmonic signals of each time are input into a harmonic signal control module to be subjected to harmonic amplitude control and regulation of the ratio of the harmonic signals of each time, the subwoofer signals are output through a first output end, the harmonic signals of each time are output through a second output end and output to the harmonic generation module through a feedback module, and generation of the harmonic signals of each time is controlled in a self-adaptation mode. The method and device for the strengthening subwoofer signals adopt full-time-domain processing and fixed-point calculation, and occupies a few hardware resources, a loudness control module for harmonic signals and the like adopts self-adaptation Q-value calibration adjustment, the output subwoofer signals avoid overflowing, and the maximum accuracy of the output subwoofer signals is guaranteed. The control over the loudness and the sound type is optimized, a smoothing filtering module carries out smoothing filtering on the adjusted harmonic signals, and therefore the sound effect sounds more natural and continuous.

Description

technical field [0001] The invention relates to audio signal processing technology, in particular to a method and device for enhancing bass signals. Background technique [0002] Audio is an important part of multimedia equipment. Without good sound, no matter how good the image is, no matter how many multimedia devices are used, the multimedia equipment is not perfect. With the development of multimedia equipment, in consumer electronic products, especially handheld electronic devices and flat-panel TVs, due to the limitation of volume and shape, the size of the speaker is limited, resulting in a high resonance frequency of the speaker, which cannot radiate radiation below its resonance. Signal components at frequencies that result in a lack of bass in the audio section. [0003] Methods for realizing bass playback in the prior art include: directly using a subwoofer speaker box, increasing bass compensation, and using a power compensation filter. Subwoofer speakers have ...

AI Technical Summary

Problems solved by technology

Subwoofer speakers are low in power and high in cost, and cannot be integrated into handheld electronic devices and flat-panel TVs that are increasingly thin and light; methods of improving bass compensation and using power compensation filters are inefficient, have large distortion, and have limited effects

Therefore, it is impossible to accurately restore the bass on small and medium-sized speakers, and cannot provide consumers with higher-demand enjoyment.

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