An adaptive equalizer compensation method for a car audio

By using an adaptive equalizer compensation method for in-vehicle audio systems, in-vehicle noise is monitored and analyzed, loudness levels are calculated, and adaptive gain compensation and filtering are performed. This solves the problem of vehicle noise affecting listening and achieves high-quality audio playback.

CN119012072BActive Publication Date: 2026-05-12GUANGDONG SHENGLI ELECTRONIC TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG SHENGLI ELECTRONIC TECH CO LTD
Filing Date
2024-08-16
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

Existing technologies suffer from poor in-vehicle listening quality due to noise during vehicle operation, and lack effective adaptive gain compensation methods.

Method used

An adaptive equalizer compensation method for in-vehicle audio is adopted. Through noise monitoring, spectrum analysis and model building, the loudness levels of high and low frequencies are calculated, the compensation model is automatically matched for adaptive gain compensation, and filtering is performed through low-pass and high-pass filters.

Benefits of technology

It effectively suppresses vehicle noise, improves in-car listening experience, and ensures high-quality audio signal playback.

✦ Generated by Eureka AI based on patent content.

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    Figure CN119012072B_ABST
Patent Text Reader

Abstract

The present application belongs to the field of equalizer compensation, especially an adaptive equalizer compensation method for vehicle audio, aiming at the problem that the existing method is not convenient for effectively adaptive gain compensation of the noise generated during vehicle driving, thereby affecting the listening effect of the people in the vehicle, the present application proposes the following scheme, which comprises the following steps: S1: preparing a compensation system, the compensation system comprises a noise monitoring module and a multimedia audio acquisition module, the noise monitoring module is connected with a noise acquisition module, the noise acquisition module is connected with a spectrum analysis module, the spectrum analysis module is connected with a model establishment module, the model establishment module is connected with a database module, and the multimedia audio acquisition module is connected with a loudness monitoring module, the present application can effectively adaptive gain compensation of the noise generated during vehicle driving in the use process, thereby effectively guaranteeing the listening effect of the people in the vehicle.
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Description

Technical Field

[0001] This invention relates to the field of equalizer compensation technology, and in particular to an adaptive equalizer compensation method for car audio systems. Background Technology

[0002] Currently, existing car audio systems are divided into two categories: analog speakers and digital speakers. On the one hand, traditional analog speakers suffer from high system power consumption, susceptibility to interference signals, and poor anti-interference capabilities, resulting in limited use. On the other hand, fully digital speakers are driven by digital signals, eliminating the need for digital-to-analog conversion, amplification, and filtering, thus offering advantages such as smaller size, lower power consumption, and stronger anti-interference capabilities. For fully digital speaker products, achieving the high fidelity characteristic of traditional analog speakers is a hot research area. Currently, only a few car audio processing products on the market are specifically developed for fully digital speakers.

[0003] In existing technologies, it is not convenient to effectively adaptively compensate for noise generated during vehicle operation, which in turn affects the listening experience of passengers inside the vehicle. To address this issue, we propose an adaptive equalizer compensation method for in-vehicle audio systems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies that make it difficult to effectively adaptively compensate for noise generated during vehicle operation, thus affecting the listening experience of occupants. Therefore, this invention proposes an adaptive equalizer compensation method for in-vehicle audio systems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adaptive equalizer compensation method for car audio systems includes the following steps:

[0007] S1: Prepare a compensation system. The compensation system includes a noise monitoring module and a multimedia audio acquisition module. The noise monitoring module is connected to the noise acquisition module, which is connected to a spectrum analysis module. The spectrum analysis module is connected to a model building module, which is connected to a database module. The multimedia audio acquisition module is connected to a loudness monitoring module, which is connected to a classification module. The classification module is connected to a vibration detection module and a processing and analysis module. The classification module is connected to the spectrum analysis module, and the processing and analysis module is connected to the database module. The processing and analysis module is connected to a control module and a compensation level setting module. The compensation level setting module is connected to a compensation level selection module, which is connected to the control module. The control module is connected to an automatic compensation module, which is connected to a low-pass filter module, an equalizer module, and a high-pass filter module. The low-pass filter module, equalizer module, and high-pass filter module are all connected to the same speaker module. The speaker module is connected to a test and analysis module.

[0008] S2: The multimedia audio acquisition module and noise acquisition module acquire in-vehicle multimedia sound and noise. The loudness monitoring module and spectrum analysis module analyze in-vehicle multimedia sound and noise. Then, the classification module classifies the sound signals. At the same time, the model building module can build corresponding compensation models based on in-vehicle noise data and store them in the database module.

[0009] S3: Then, the processing and analysis module can extract the in-vehicle multimedia sound and noise, and then transmit it to the level calculation unit. The level calculation unit calculates the loudness level of the high and low sounds based on the spectral characteristics of the extracted audio signal, automatically matches the compensation model in the database module according to the loudness level, and generates control commands to send to the control module.

[0010] S4: Finally, the control module controls the automatic compensation module to perform adaptive gain compensation on the audio. The low-pass filter module, equalizer module, and high-pass filter module filter the compensated audio. Then, the automatically compensated audio signal is transmitted to the speaker module for playback.

[0011] Preferably, the noise monitoring module includes a vehicle speed monitoring unit, a wind noise monitoring unit, a tire noise monitoring unit, and an air conditioning fan speed monitoring unit. The vehicle speed monitoring unit is connected to the wind noise monitoring unit, the wind noise monitoring unit is connected to the tire noise monitoring unit, and the tire noise monitoring unit is connected to the air conditioning fan speed monitoring unit.

[0012] Preferably, the vibration monitoring module includes a vibration sensor unit, an acceleration sensor unit, and an information transmission unit, wherein the vibration sensor unit is connected to the acceleration sensor unit, and the acceleration sensor unit is connected to the information transmission unit.

[0013] Preferably, the multimedia audio acquisition module and the noise acquisition module are used to acquire audio signals of in-vehicle multimedia sound, driving speed, wind noise, tire noise and air conditioning fan speed, and transmit the acquired data to the classification module for classification processing.

[0014] Preferably, the model building module is used to build a corresponding compensation model based on the collected audio signal data, and transmit the compensation model to the database module for storage.

[0015] Preferably, the processing and analysis module is used to extract the spectral characteristics of the audio signal, calculate the loudness levels of high and low frequencies through the level calculation unit, and then configure the corresponding loudness gain compensation level according to the current playback volume.

[0016] Preferably, the automatic compensation module includes a compensation receiving unit, a loudness compensation unit, and a reconstruction unit, wherein the compensation receiving unit is connected to the loudness compensation unit, and the loudness compensation unit is connected to the reconstruction unit.

[0017] Preferably, the processing and analysis module includes an extraction unit, a level calculation unit, and a matching unit, wherein the extraction unit is connected to the level calculation unit, and the level calculation unit is connected to the matching unit.

[0018] The beneficial effects of the adaptive equalizer compensation method for car audio systems described in this invention are as follows:

[0019] 1. This solution uses a multimedia audio acquisition module and a noise acquisition module to collect audio signals of in-vehicle multimedia sound, driving speed, wind noise, tire noise and air conditioning fan speed. The collected data is then transmitted to a classification module for classification processing. The model building module then builds a corresponding compensation model based on the collected audio signal data and transmits the compensation model to a database module for storage.

[0020] 2. This solution can extract in-vehicle multimedia sound and noise through the processing and analysis module, and then transmit it to the level calculation unit. The level calculation unit calculates the loudness level of high and low sounds based on the spectral characteristics of the extracted audio signal, automatically matches the compensation model in the database module according to the loudness level, and generates control commands to send to the control module. The automatic compensation module performs adaptive gain compensation for the audio.

[0021] 3. This solution uses a low-pass filter module, an equalizer module, and a high-pass filter module to filter the compensated audio, and then transmits the automatically compensated audio signal to the speaker module for playback, further ensuring the playback effect.

[0022] This invention enables effective adaptive gain compensation for noise generated during vehicle operation, thereby ensuring the listening experience for passengers inside the vehicle. Attached Figure Description

[0023] Figure 1 This is a structural block diagram of the compensation system for an adaptive equalizer compensation method for in-vehicle audio systems proposed in this invention.

[0024] Figure 2 This is a structural block diagram of the processing and analysis module of the adaptive equalizer compensation method for in-vehicle audio proposed in this invention;

[0025] Figure 3 This is a structural block diagram of the noise monitoring module of an adaptive equalizer compensation method for in-vehicle audio systems proposed in this invention.

[0026] Figure 4 This is a structural block diagram of the automatic compensation module of the adaptive equalizer compensation method for car audio proposed in this invention.

[0027] Figure 5 This is a structural block diagram of the vibration monitoring module of the adaptive equalizer compensation method for in-vehicle audio proposed in this invention. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example 1

[0030] Reference Figures 1-5 An adaptive equalizer compensation method for car audio systems includes the following steps:

[0031] S1: Prepare the compensation system, which includes a noise monitoring module and a multimedia audio acquisition module. The noise monitoring module is connected to the noise acquisition module, which in turn is connected to a spectrum analysis module. The spectrum analysis module is connected to a model building module, which is connected to a database module. The multimedia audio acquisition module is connected to a loudness monitoring module, which is connected to a classification module. The classification module is connected to a vibration detection module and a processing and analysis module. The classification module is connected to the spectrum analysis module, and the processing and analysis module is connected to the database module. The processing and analysis module is connected to a control module and a compensation level setting module. The compensation level setting module is connected to a compensation level selection module, which is connected to the control module. The control module is connected to an automatic compensation module. The system is connected to a low-pass filter module, an equalizer module, and a high-pass filter module. The low-pass filter allows low-frequency or DC components in the signal to pass through while suppressing high-frequency components or interference and noise. The high-pass filter allows high-frequency components in the signal to pass through while suppressing low-frequency or DC components. The low-pass filter module, equalizer module, and high-pass filter module are connected to the same speaker module. The speaker module is connected to a test and analysis module. The multimedia audio acquisition module and noise acquisition module are used to acquire audio signals of in-vehicle multimedia sound, driving speed, wind noise, tire noise, and air conditioning fan speed, and transmit the acquired data to the classification module for classification processing. The model building module is used to build corresponding compensation models based on the acquired audio signal data and transmit the compensation models to the database module for storage.

[0032] S2: The multimedia audio acquisition module and noise acquisition module acquire in-vehicle multimedia sound and noise. The loudness monitoring module and spectrum analysis module analyze in-vehicle multimedia sound and noise. Then, the classification module classifies the sound signals. At the same time, the model building module can build corresponding compensation models based on in-vehicle noise data and store them in the database module.

[0033] S3: Then, the processing and analysis module can extract the in-vehicle multimedia sound and noise, and then transmit it to the level calculation unit. The level calculation unit calculates the loudness level of the high and low sounds based on the spectral characteristics of the extracted audio signal, automatically matches the compensation model in the database module according to the loudness level, and generates control commands to send to the control module.

[0034] S4: Finally, the control module controls the automatic compensation module to perform adaptive gain compensation on the audio. The low-pass filter module, equalizer module, and high-pass filter module filter the compensated audio. Then, the automatically compensated audio signal is transmitted to the speaker module for playback.

[0035] Reference Figure 2The processing and analysis module includes an extraction unit, a level calculation unit, and a matching unit. The extraction unit is connected to the level calculation unit, and the level calculation unit is connected to the matching unit. The processing and analysis module is used to extract the spectral characteristics of the audio signal, calculate the loudness levels of high and low frequencies through the level calculation unit, and then configure the corresponding loudness gain compensation level according to the current playback volume.

[0036] Reference Figure 3 The noise monitoring module includes a vehicle speed monitoring unit, a wind noise monitoring unit, a tire noise monitoring unit, and an air conditioning fan speed monitoring unit. The vehicle speed monitoring unit is connected to the wind noise monitoring unit, the wind noise monitoring unit is connected to the tire noise monitoring unit, and the tire noise monitoring unit is connected to the air conditioning fan speed monitoring unit. The noise monitoring module can extract key factors that affect in-vehicle listening (noise generated by driving speed, driving wind noise, driving tire noise, air conditioning fan speed, etc.).

[0037] Reference Figure 4 The automatic compensation module includes a compensation receiving unit, a loudness compensation unit, and a reconstruction unit. The compensation receiving unit is connected to the loudness compensation unit, and the loudness compensation unit is connected to the reconstruction unit.

[0038] Reference Figure 5 The vibration monitoring module includes a vibration sensor unit, an acceleration sensor unit, and an information transmission unit. The vibration sensor unit is connected to the acceleration sensor unit, and the acceleration sensor unit is connected to the information transmission unit. The vibration monitoring module can monitor the vibration of the engine and the vehicle body and collect corresponding data.

[0039] In this embodiment, during use, the multimedia audio acquisition module and noise acquisition module collect in-vehicle multimedia sound and noise. The loudness monitoring module and spectrum analysis module analyze the in-vehicle multimedia sound and noise. Then, the classification module classifies the sound signals. Simultaneously, the model building module builds a corresponding compensation model based on the in-vehicle noise data and stores it in the database module. Then, the processing and analysis module extracts the in-vehicle multimedia sound and noise and transmits it to the level calculation unit. The level calculation unit calculates the loudness levels of high and low frequencies based on the spectral characteristics of the extracted audio signal, automatically matches the compensation model in the database module according to the loudness level, and generates control commands to send to the control module. Finally, the control module controls the automatic compensation module to perform adaptive gain compensation on the audio. The low-pass filter module, equalizer module, and high-pass filter module filter the compensated audio and then transmit the automatically compensated audio signal to the speaker module for playback.

[0040] Example 2

[0041] The difference between this embodiment and Embodiment 1 is that: the test analysis module is connected to a judgment module, and the judgment module is connected to the automatic compensation module. The test analysis module can test and analyze the compensated audio signal and transmit the test results to the judgment module. The judgment module calculates whether the compensation standard is met according to the corresponding algorithm. If the compensation standard is not met, the audio signal is transmitted to the automatic compensation module again for gain compensation to further ensure the audio signal compensation effect.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adaptive equalizer compensation method for car audio systems, characterized in that, Includes the following steps: S1: Prepare a compensation system. The compensation system includes a noise monitoring module and a multimedia audio acquisition module. The noise monitoring module is connected to the noise acquisition module, which is connected to a spectrum analysis module. The spectrum analysis module is connected to a model building module, which is connected to a database module. The multimedia audio acquisition module is connected to a loudness monitoring module, which is connected to a classification module. The classification module is connected to a vibration monitoring module and a processing and analysis module. The classification module is connected to the spectrum analysis module, which is connected to the database module. The processing and analysis module is connected to a control module and a compensation level setting module. The compensation level setting module is connected to a compensation level selection module, which is connected to the control module. The control module is connected to an automatic compensation module, which is connected to a low-pass filter module, an equalizer module, and a high-pass filter module. The low-pass filter module, equalizer module, and high-pass filter module are all connected to the same speaker module. The speaker module is connected to a test and analysis module. S2: The multimedia audio acquisition module and noise acquisition module acquire in-vehicle multimedia sound and noise. The loudness monitoring module and spectrum analysis module analyze in-vehicle multimedia sound and noise. Then, the classification module classifies the sound signals. At the same time, the model building module can build corresponding compensation models based on in-vehicle noise data and store them in the database module. S3: Then, the processing and analysis module can extract the in-vehicle multimedia sound and noise, and then transmit it to the level calculation unit. The level calculation unit calculates the loudness level of the high and low sounds based on the spectral characteristics of the extracted audio signal, automatically matches the compensation model in the database module according to the loudness level, and generates control commands to send to the control module. S4: Finally, the control module controls the automatic compensation module to perform adaptive gain compensation on the audio. The low-pass filter module, equalizer module, and high-pass filter module filter the compensated audio. Then, the automatically compensated audio signal is transmitted to the speaker module for playback.

2. The adaptive equalizer compensation method for vehicle audio systems according to claim 1, characterized in that, The processing and analysis module includes an extraction unit, a level calculation unit, and a matching unit. The extraction unit is connected to the level calculation unit, and the level calculation unit is connected to the matching unit.

3. The adaptive equalizer compensation method for in-vehicle audio systems according to claim 2, characterized in that, The noise monitoring module includes a vehicle speed monitoring unit, a wind noise monitoring unit, a tire noise monitoring unit, and an air conditioning fan speed monitoring unit. The vehicle speed monitoring unit is connected to the wind noise monitoring unit, the wind noise monitoring unit is connected to the tire noise monitoring unit, and the tire noise monitoring unit is connected to the air conditioning fan speed monitoring unit.

4. The adaptive equalizer compensation method for in-vehicle audio systems according to claim 3, characterized in that, The automatic compensation module includes a compensation receiving unit, a loudness compensation unit, and a reconstruction unit. The compensation receiving unit is connected to the loudness compensation unit, and the loudness compensation unit is connected to the reconstruction unit.

5. The adaptive equalizer compensation method for a car audio system according to claim 4, characterized in that, The vibration monitoring module includes a vibration sensor unit, an acceleration sensor unit, and an information transmission unit. The vibration sensor unit is connected to the acceleration sensor unit, and the acceleration sensor unit is connected to the information transmission unit.

6. The adaptive equalizer compensation method for vehicle audio systems according to claim 5, characterized in that, The processing and analysis module is used to extract the spectral characteristics of the audio signal, calculate the loudness levels of high and low frequencies through the level calculation unit, and then configure the corresponding loudness gain compensation level according to the current playback volume.

7. The adaptive equalizer compensation method for vehicle audio systems according to claim 6, characterized in that, The multimedia audio acquisition module and noise acquisition module are used to acquire audio signals of in-vehicle multimedia sound, driving speed, wind noise, tire noise and air conditioning fan speed, and transmit the acquired data to the classification module for classification processing.

8. The adaptive equalizer compensation method for a car audio system according to claim 7, characterized in that, The model building module is used to build a corresponding compensation model based on the collected audio signal data, and then transmit the compensation model to the database module for storage.