WO2023221955A1 - Vehicle-mounted sound effect system and vehicle sound effect processing method - Google Patents

Abstract

Disclosed in embodiments of the present application is a vehicle-mounted sound effect system and a vehicle sound effect processing method. The system comprises a vehicle-mounted audio subsystem and a seat; the vehicle-mounted audio subsystem comprises a power amplifier and a vehicle-mounted loudspeaker. The power amplifier is configured to obtain audio data to be played back, perform first preset sound effect processing on said audio data and perform second preset sound effect processing on said audio data, and respectively sending, to the seat and the vehicle-mounted loudspeaker, said audio data subjected to the first preset sound effect processing and said audio data subjected to the second preset sound effect processing. The seat is provided with an oscillator, and the oscillator is configured to receive said audio data subjected to the first preset sound effect processing, and generate vibration on the basis of said audio data subjected to the first preset sound effect processing, so as to form a 4D vehicle sound effect with said audio data played back by the vehicle-mounted loudspeaker and subjected to the second preset sound effect processing.

Description

Vehicle sound effect system and vehicle sound effect processing method

This application claims priority to the Chinese patent application with application number 202210528588.2, which was submitted to the China Patent Office on May 16, 2022. The entire content of the above application is incorporated into this application by reference.

Technical field

Embodiments of the present application relate to the technical field of automotive equipment, for example, to a vehicle audio effect system and a vehicle audio effect processing method.

Background technique

4D movie viewing technology combines vibration, wind, rain and other scenes in the movie with the 3D movie projected on the screen to truly restore it in the theater, allowing the audience to experience the movie immersively from multiple senses such as vision, hearing, touch and so on. entertainment effect. With the development of the automobile industry, consumers are paying more attention to in-vehicle infotainment products. In addition to requiring cars to be equipped with high-quality sound systems, they also hope to have an immersive music experience with 4D effects.

Contents of the invention

Embodiments of the present application provide a vehicle-mounted sound effect system and a vehicle-mounted sound effect processing method, which can enable the original car to vibrate the seats while playing high-quality music on the speakers to form a 4D sound effect.

An embodiment of the present application provides a vehicle audio system, which includes:

Vehicle audio subsystems and seats;

The vehicle audio subsystem includes a power amplifier and a vehicle speaker. The power amplifier is configured to obtain audio data to be played, perform a first preset sound effect processing on the audio data to be played, and perform a second preset sound effect processing on the audio data to be played. Preset sound effect processing, and send the audio data to be played after the first preset sound effect processing and the audio data to be played after the second preset sound effect processing to the seat and the vehicle speaker respectively. ;

The seat is provided with an oscillator, and the oscillator is configured to receive audio data to be played that has been processed by the first preset sound effect, and based on the audio data to be played that has been processed by the first preset sound effect. The data vibrates and forms a 4D vehicle sound effect with the to-be-played audio data played by the vehicle speaker that has been processed by the second preset sound effect.

The embodiment of the present application provides a vehicle sound effect processing method, including:

Get the audio data to be played;

Process the audio data to be played according to the first preset sound effect processing process to obtain the first audio Process the result, and process the audio data to be played according to the second preset sound effect processing process to obtain the second audio processing result;

The first audio processing result is sent to a car seat equipped with an oscillator to drive the oscillator to vibrate, and the second audio processing result is sent to a car speaker for audio playback to form a 4D car sound effect .

Description of the drawings

Figure 1 is a schematic structural diagram of a vehicle audio system provided in Embodiment 1 of the present application;

Figure 2 is a schematic structural diagram of an audio processing module provided in Embodiment 1 of the present application;

Figure 3 is a flow chart of a vehicle sound effect processing method provided in Embodiment 2 of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Embodiment 1

Figure 1 is a schematic structural diagram of an in-vehicle audio system provided in Embodiment 1 of the present application. The embodiment of the present application can be applied to the scenario of a mobile car that implements 4D in-vehicle sound effects. The system can be configured in the in-vehicle infotainment (in -vehicle infotainment, IVI) system.

As shown in Figure 1, the vehicle audio system includes: vehicle audio subsystem and seats.

Car audio subsystems include power amplifiers and car speakers. The power amplifier is configured to obtain audio data to be played, perform first preset sound effect processing on the audio data to be played and second preset sound effect processing on the audio data to be played, and process the audio data to be played after the first preset sound effect processing and The audio data to be played after being processed by the second preset sound effect is sent to the seat and the car speakers respectively.

The seat is provided with an oscillator, and the oscillator is configured to receive audio data to be played that has been processed by the first preset sound effect, and to generate vibration based on the audio data to be played that has been processed by the first preset sound effect, and to interact with the process of playback by the vehicle-mounted speaker. The audio data to be played after the second preset sound effect is processed forms a 4D vehicle sound effect. In an optional implementation, the oscillator can be a low-frequency oscillator, which is arranged at the back position of the seat. The low-frequency oscillator can better adapt to the car audio system and achieve greater amplitude of oscillation. In addition, because the contact area between the seat back and the passenger's body is larger, setting the oscillator here can make the vibration effect more obvious.

In order to further enhance the oscillation effect, the number of oscillators on each seat can be set to greater than or equal to two, and considering that the number of oscillators may be relatively large, in order to reduce power amplifier data transmission To occupy the pins, multiple oscillators can be connected in parallel. This connection method can also make the signal transmission speed faster, so that each oscillator can oscillate at the same amplitude at the same time, ensuring that the user has a good Immersive music experience. In addition, in order to resist external electromagnetic wave interference and reduce the interference of its own signal to the outside world, twisted pairs can be used to connect the power amplifier and multiple oscillators for signal transmission.

Optionally, the power amplifier includes a first audio processing module and a second audio processing module, and the number of vehicle-mounted speakers is multiple. The first audio processing module is configured to process the audio data to be played according to the first preset sound effect processing process to obtain the first audio processing result, send the first audio processing result to the oscillator, and drive the oscillator to generate oscillation to allow the passengers to feel to shock. During the audio processing, the first audio processing module converts the audio signal corresponding to the audio data to be played through audio processing to obtain a vibration signal synchronized with the audio signal, and then sends the vibration signal to the oscillator. The second audio processing module is configured to process the audio data to be played according to the second preset sound effect processing process to obtain a second audio processing result, and send the second audio processing result to multiple vehicle-mounted speakers to form a sound effect that can be heard by passengers in the vehicle. . Among them, the second preset sound effect processing process can use a variety of preset sound effect processing algorithms to perform sound effect processing. For example, when conventional audio processing is performed to enable audio playback on each vehicle speaker, some ambient sound effects can also be superimposed on the audio data to be played.

In an optional implementation, the second audio processing module includes an audio frequency division sub-module, configured to divide the audio data to be played according to a preset frequency division standard to obtain audio data to be played in different frequency bands, and Send the audio data to be played in different frequency bands to multiple car speakers for playback.

The working process of the vehicle audio system is as follows: after the user selects the audio data to be played through the IVI system interactive interface, the IVI system sends the audio data to be played to the vehicle audio system, and then the vehicle audio system sends the audio data to be played to the vehicle audio subsystem. , the power amplifier in the vehicle audio subsystem obtains the audio data to be played and then transmits the audio data to be played to the first audio processing module and the second audio processing module respectively. The first audio processing module obtains the audio data to be played, processes the audio to be played, converts the audio signal corresponding to the audio data to be played into a vibration signal synchronized with the audio signal, and then sends the vibration signal to the vehicle seat. chair, after the vehicle seat receives the vibration signal synchronized with the audio signal, it drives the oscillator to vibrate synchronized with the audio signal; at the same time, the second audio processing module obtains the audio data to be played, and according to the preset frequency division standard, the audio data to be played is Play the audio data and divide the data to obtain audio data to be played in different frequency bands. Then, the audio data to be played in different frequency bands are sent to multiple vehicle-mounted speakers, and the multiple vehicle-mounted speakers play the audio data to be played in different frequency bands.

In an optional implementation, the structural diagram of the first audio processing module is shown in Figure 2, including: a first low-pass filter sub-module, a fundamental frequency filter sub-module, a frequency band adjustment sub-module, a second low-pass filter submodule and inverse filtering submodule.

The first low-pass filtering sub-module is configured to filter the audio data to be played to obtain first filtered audio data with a frequency less than or equal to the first frequency threshold. The first filtered audio data may select a low-frequency signal that can generate a strong vibration. For example, the first filtered audio may select a low-frequency signal less than or equal to 200 Hz.

The fundamental frequency filtering sub-module is configured to filter the harmonics in the first filtered audio data to obtain the second filtered audio data. Filtering harmonics other than the fundamental frequency can eliminate unclear music signals and make the vibration signal obtained after processing more pure.

The frequency band adjustment submodule is configured to map the second filtered audio data to a preset frequency band range to obtain target frequency band audio data. Among them, the frequency band of the fundamental frequency can be adjusted down to a preset frequency range, so that the processed vibration signal is more concentrated near the resonant frequency and improves the vibration feeling of the seat.

The second low-pass filtering sub-module is configured to filter the target frequency band audio data to obtain third filtered audio data with a frequency less than or equal to the second frequency threshold. Wherein, the second frequency threshold is smaller than the first frequency threshold, so that the retained audio signal can be converted into a vibration signal with a stronger vibration feeling. For example, the second frequency threshold can be selected to be less than or equal to 100 Hz.

The inverse filtering sub-module is configured to perform phase compensation on the third filtered audio data, obtain a first audio processing result, and send the first audio processing result to the oscillator. Among them, the first audio processing result obtained after phase compensation is a vibration signal, and the vibration signal is synchronized with the audio signal corresponding to the music data to be played.

The technical solution provided by the embodiment of the present application forms a 4D vehicle audio system through a vehicle audio subsystem and seats. The vehicle audio subsystem includes a power amplifier and a vehicle speaker. The power amplifier includes a first audio processing module and a second audio system. The processing module is provided with an oscillator on the seat. The audio data to be played is obtained by the power amplifier, and the audio data to be played is transmitted to the first audio processing module and the second audio processing module respectively. The two modules respectively perform preset sound effect processing on the audio data to be played: the first processing is The first audio processing module performs primary filtering, harmonic removal, frequency band adjustment, secondary filtering and inverse filtering on the audio data to be played, and then converts the audio data to be played into a vibration signal that is synchronized with the audio signal corresponding to the audio data to be played. ; The second process is that the second audio processing module divides the audio data to be played according to the preset frequency division standard to obtain the audio data to be played in different frequency bands. The audio data to be played after being processed by the first audio processing module and the audio data to be played after being processed by the second audio processing module are respectively sent to the oscillator of the seat and the vehicle-mounted speaker. The oscillator of the seat is driven by the vibration signal. It generates vibrations and forms a 4D car sound effect with the audio played by the car speakers. The technical solution provided by the embodiment of the present application realizes the synergetic effect of the 4D sound effect seat vibration device while the original in-car audio plays high-quality music, bringing a strong sense of presence and psychological and physiological pleasure to the user. , which can make users achieve mental relaxation.

Embodiment 2

Figure 3 is a flow chart of an in-vehicle sound effect processing method provided in Embodiment 2 of the present application. This embodiment can be applied to mobile cars that implement 4D in-vehicle sound effects, so that the original car speakers can play high-quality music while vibrating the seats. to produce 4D sound effects.

As shown in Figure 3, the vehicle audio processing method includes the following steps:

S310. Obtain the audio data to be played.

After the user selects the audio data to be played on the IVI system interactive interface, the IVI system sends the audio data to be played to the vehicle audio system, and then the vehicle audio system sends the audio data to be played to the vehicle audio subsystem. The power amplifier of the vehicle audio subsystem can Get the audio data to be played and process the audio data to be played.

S320: Process the audio data to be played according to the first preset sound effect processing process to obtain the first audio processing result, and process the audio data to be played according to the second preset sound effect processing process to obtain the second audio processing result.

The first audio processing module and the second audio processing module in the power amplifier process the audio data to be played respectively. After obtaining the audio data to be played, the first audio processing module extracts the low-frequency signal in the audio data to be played, processes the low-frequency signal, and then uses the processed low-frequency signal as a driving signal for the seat oscillator to vibrate, and then drives the The signal is used as the first audio processing result; the second audio processing module divides the audio data to be played according to the preset frequency division standard to obtain audio data to be played in different frequency bands, and uses the audio data to be played in different frequency bands as the second Audio processing results.

The process of processing the audio data to be played according to the first preset sound effect processing process (algorithm) includes: performing a first low-pass filtering on the audio data to be played to obtain first filtered audio data with a frequency less than or equal to the first frequency threshold. The first filtered audio data can select a low-frequency signal that can produce a strong sense of vibration. For example, the first filtered audio can select a low-frequency signal less than or equal to 200Hz; filter the harmonics in the first filtered audio data to obtain the second filtered audio. data. Filtering harmonics outside the fundamental frequency can eliminate unclear music signals and make the vibration signal obtained after processing more pure; map the second filtered audio data to the preset frequency band range to obtain the target frequency band audio data. Among them, the frequency band of the fundamental frequency can be lowered to the preset frequency range, so that the vibration signal obtained after processing is more concentrated near the resonant frequency, improving the vibration feeling of the seat; and then the target frequency band audio data can be lowered for a second time. Through filtering, third filtered audio data with a frequency less than or equal to the second frequency threshold is obtained. Among them, the second frequency threshold is smaller than the first frequency threshold, so that the retained audio signal can be converted into a vibration signal with a stronger sense of vibration. For example, the second frequency threshold can be selected to be less than or equal to 100Hz; for the third filtered audio data Phase compensation is performed to obtain the first audio processing result. Among them, the first audio processing result obtained after phase compensation is the vibration signal used to drive the oscillator to vibrate.

The second preset sound effect processing algorithm processes the audio data to be played to obtain the second audio processing result. In the process, the audio data to be played can be divided according to the preset frequency division standard to obtain the audio data to be played in different frequency bands, and the audio data to be played in different frequency bands are used as the second audio processing result. Among them, the frequency division standard can be adjusted according to the frequency of audio played by the car speakers, which can give users sensory experience in different modes.

S330. Send the first audio processing result to a vehicle seat equipped with an oscillator, drive the oscillator to vibrate, and send the second audio processing result to the vehicle speaker for audio playback to form a 4D vehicle sound effect.

The first audio processing module sends the first audio processing result to the vehicle seat equipped with an oscillator. After receiving the first audio processing result, the vehicle seat drives the oscillator to vibrate; at the same time, the second audio processing module sends the second The audio processing results are sent to multiple car speakers, and the multiple car speakers play audio to form 4D car sound effects.

The technical solution provided by the embodiment of the present application provides a vehicle audio effect processing method. After the user selects the audio data to be played on the IVI system interactive interface, the vehicle audio effect system can obtain the audio data to be played. Subsequently, the vehicle audio effect system will The audio data to be played is sent to the vehicle audio subsystem. The power amplifier of the vehicle audio subsystem sends the audio data to be played to the first audio processing module and the second audio processing module respectively for corresponding sound effect processing: the first audio processing module passes the audio data to be played. After playing the audio data for primary filtering, harmonic removal, frequency band adjustment, secondary filtering and inverse filtering, the audio signal corresponding to the audio data to be played is converted into a vibration signal synchronized with the audio signal; the second audio processing module follows the preset Set the frequency division standard, divide the audio data to be played, and obtain the audio data to be played in different frequency bands. The audio data to be played processed by the first audio processing module and the audio data to be played processed by the second audio processing module are respectively sent to the oscillator of the seat and the vehicle-mounted speaker. The oscillator of the seat is driven by the vibration signal. It generates vibrations and forms a 4D car sound effect with the audio played by the car speakers. The technical solution provided by the embodiments of this application enables the original in-car speakers to play high-quality music while simultaneously causing the seats to vibrate to produce 4D sound effects, giving users a strong sense of presence and a sense of psychological and physiological pleasure. , can make users achieve mental relaxation effect.

Claims (10)

1. A car audio system, including:

   Vehicle audio subsystems and seats;

   The vehicle audio subsystem includes a power amplifier and a vehicle speaker. The power amplifier is configured to obtain audio data to be played, perform a first preset sound effect processing on the audio data to be played, and perform a second preset sound effect processing on the audio data to be played. Preset sound effect processing, and send the audio data to be played after the first preset sound effect processing and the audio data to be played after the second preset sound effect processing to the seat and the vehicle speaker respectively. ;

   The seat is provided with an oscillator, and the oscillator is configured to receive audio data to be played that has been processed by the first preset sound effect, and based on the audio data to be played that has been processed by the first preset sound effect. The data vibrates and forms a 4D vehicle sound effect with the to-be-played audio data played by the vehicle speaker that has been processed by the second preset sound effect.
2. The system according to claim 1, wherein the power amplifier includes a first audio processing module and a second audio processing module; the number of the vehicle-mounted speakers is multiple;

   The first audio processing module is configured to process the to-be-played audio data according to a first preset sound effect processing process to obtain a first audio processing result, and send the first audio processing result to the oscillator;

   The second audio processing module is configured to process the to-be-played audio data according to a second preset sound effect processing process to obtain a second audio processing result, and send the second audio processing result to the plurality of vehicle-mounted speakers.
3. The system according to claim 2, wherein the first audio processing module includes: a first low-pass filter sub-module, a fundamental frequency filter sub-module, a frequency band adjustment sub-module, a second low-pass filter sub-module and an inverse filter submodule;

   The first low-pass filtering sub-module is configured to filter the audio data to be played to obtain first filtered audio data with a frequency less than or equal to a first frequency threshold;

   The fundamental frequency filtering sub-module is configured to filter harmonics in the first filtered audio data to obtain second filtered audio data;

   The frequency band adjustment sub-module is configured to map the second filtered audio data to a preset frequency band range to obtain target frequency band audio data;

   The second low-pass filtering sub-module is configured to filter the target frequency band audio data to obtain third filtered audio data with a frequency less than or equal to the second frequency threshold;

   The inverse filtering sub-module is configured to perform phase compensation on the third filtered audio data, obtain the first audio processing result, and send the first audio processing result to the oscillator.
4. The system according to claim 2, wherein the second audio processing module includes an audio frequency division sub-module configured to divide the audio data to be played according to a preset frequency division standard to obtain the audio data to be played in different frequency bands. Play audio data, and send the audio data to be played in different frequency bands to the plurality of vehicle-mounted speakers for playing.
5. The system according to claim 4, wherein the oscillator is a low-frequency oscillator, and the oscillator is disposed at a seatback position of the seat.
6. The system according to claim 5, wherein the number of the oscillators on the seat is greater than or equal to two, and a plurality of oscillators are connected in parallel.
7. The system according to claim 1, wherein the power amplifier and the oscillator are connected using twisted pairs for signal transmission.
8. A vehicle sound effect processing method, including:

   Get the audio data to be played;

   Process the audio data to be played according to a first preset sound effect processing process to obtain a first audio processing result, and process the audio data to be played according to a second preset sound effect processing process to obtain a second audio processing result;

   The first audio processing result is sent to a car seat equipped with an oscillator to drive the oscillator to vibrate, and the second audio processing result is sent to a car speaker for audio playback to form a 4D car sound effect .
9. The method according to claim 8, wherein said processing the to-be-played audio data according to a first preset sound effect processing algorithm to obtain a first audio processing result includes:

   Filter the audio data to be played to obtain first filtered audio data with a frequency less than or equal to a first frequency threshold;

   Filter harmonics in the first filtered audio data to obtain second filtered audio data;

   Map the second filtered audio data to a preset frequency band range to obtain target frequency band audio data;

   Filter the target frequency band audio data to obtain third filtered audio data with a frequency less than or equal to the second frequency threshold;

   Phase compensation is performed on the third filtered audio data to obtain the first audio processing result.
10. The method according to claim 8, wherein the second preset sound effect processing algorithm processes the to-be-played audio data to obtain a second audio processing result, including:

    The audio data to be played is divided according to a preset frequency division standard to obtain audio data to be played in different frequency bands, and the audio data to be played in different frequency bands is used as the second audio processing result. fruit.