A method of bass boosting processing

Abstract

This invention refers to a process method for increasing bass effect, which converts the base frequency signal in bass band to harmonic signal to process, said base frequency signal generating multiple harmonic signal after nonlinear processing, the loudness generated by base frequency signal matched with that generated by harmonic signal, the every harmonic component of base frequency obtained by multiplication of base frequency signal and every control signal, by nonlinear processing base frequency signal of bass band to obtain multiple harmonic with higher frequency. Said invention utilizes the advantage of harmonic signal easy process to obtain same bass process effect without improving equipment and saving sound box cost in keeping bass effect.

Description

【Technical field】 [0001] The invention relates to a processing method for audio signals in a sound box, in particular to a processing method for bass signals. 【Background technique】 [0002] The miniaturization of the audio system is an important direction of the product. In order to obtain excellent sound effects, the home audio system currently adopts a large number of frequency-band pronunciation methods (such as 5.1 channel technology and systems), and uses speakers with different characteristics for different frequency bands. The main reason for the sound is that it is currently impossible for a speaker to provide high-fidelity playback in the full frequency range of the audio. At present, in the low range, a dedicated bass speaker (commonly known as a "subwoofer") is generally used for playback. Generally speaking, miniaturized sound playback systems generally do not require full-band sound playback effects, but relatively speaking, the damage to bass effects in miniat...

AI Technical Summary

Problems solved by technology

When the overall sound pressure level (SPL) of the music signal is lowered, the loudness of the middle and high frequencies will be attenuated accordingly, but the attenuation factor of the loudness in the low frequency range will be higher, resulting in a rapid decline in the bass effect. Therefore, the physiological acoustic perception of low frequencies that controls hearing is very important. difficult

[0005] The current method to deal with this effect is mainly to improve the low-frequency sound signal of this effect through compensation, which also leads to other unsolvable problems, that is, increasing the amplitude compensation of the low-frequency signal will lead to distortion of the audio sound wave, which will bring Some new problems, such as the requirement to expand the dynamic range of audio signals and easily cause overload of audio equipment, and to improve the attenuation of low-frequency sound waves caused by speakers (its sound pressure is attenuated by about 40dB per octave below its cut-off frequency) tend to cause problems. Increase the cost of devices and materials, which is very unfavorable for production cost control in a large number of applications (such as multimedia speakers)

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