Bass boosting processing method and device

A technology of bass and multiplier, applied in automatic pitch/bandwidth control, instrument, stereo circuit arrangement, etc., can solve problems such as complex structure, unsatisfactory bass enhancement effect, etc., and achieve good effect of bass enhancement

Inactive Publication Date: 2006-07-12
SHENZHEN LANGUANG ELECTRONICS INDAL CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The second object of the present invention is to provide a simple structure, low-frequency enhancement device for the existing bass booster device that uses continuous multiple harmonic combinations to replace the fundamental frequency signal. Relatively good bass booster

Method used

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  • Bass boosting processing method and device

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Embodiment Construction

[0036] Embodiment is the device of bass enhancement processing, and the function and connection relation of each component of it are as figure 1 shown, as described below:

[0037] (a) bandpass filter 1: its effect is to obtain the required low-frequency signal of algorithm from input signal, present embodiment adopts a 4th order bandpass IIR bandpass filter, the upper passband point of this bandpass filter is set is the cutoff frequency point of the system, and the lower passband point is set to half of the cutoff frequency point, such as the system cutoff frequency point is set to 160HZ, then the passband of the bandpass filter is [80, 160], the transition of the bandpass filter The band attenuation characteristic has a great influence on the bass enhancement effect, and it is more appropriate for the band pass filter 1 of this embodiment to use an attenuation range of 12-24 db / oct.

[0038] (b) Energy detector 2: Energy detection is mainly for the needs of harmonic energy ...

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Abstract

The method for bass boosting treatment comprises: transforming the base frequency signal on low-frequency range into effective combination of second, third and fourth harmonic signals with loudness matched with base frequency signal. The opposite device comprises: a bandpass filter to filter input signal and obtain low-frequency signal, a multiplier to multiply the low-frequency signal self and low-frequency signal with second, third and fourth harmonic signals respectively, an energy detector for low-frequency signal, a auto-gain control module to calculate output control signal according to detector result and control time-varying gain of said harmonic signals, a constant attenuator to control fixed gain of harmonic signals, and a summator to add effective harmonics. This invention is simple but with well effect.

Description

technical field [0001] The invention relates to a method and device for synergistic processing of low-frequency signals in an audio system. Background technique [0002] People have always regarded the low-frequency response characteristics of the audio system as an important indicator to measure the quality of the product, but many products are limited by factors such as size, cost and power, and their low-frequency performance is not satisfactory. Generally, the traditional method of bass enhancement is to increase the energy of the low-frequency part, but it also brings many problems, such as easy overload of speakers and amplifiers, serious nonlinear distortion, etc., especially for lower-end and miniaturized audio systems. , its bass performance is muddy, and there are often obvious distorted sounds such as splitting, popping, and humming, and even physical damage to the speaker. [0003] From the principle of psychoacoustics, we know that if the spectrum of the audio ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G5/16H04R3/04H04R5/04
CPCH04R3/04G10H5/07G10H1/0091G10H1/12G10H2210/315G10H2250/481
Inventor 林雁周耀良郭平日
Owner SHENZHEN LANGUANG ELECTRONICS INDAL CORP
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