Audio sound production system, audio device, and vehicle

Abstract

The embodiment of the application provides an audio sounding system, an audio device and a vehicle. The audio sounding system comprises a digital audio broadcast receiving box, an intermediate concentrator, a system-level chip, an audio bus controller, a power amplification component and a loudspeaker. The application solves the technical problem of how to create a special sounding channel for the external digital audio broadcast receiving box to avoid mutual interference with other audio outputs.

Description

Technical Field

[0001] This application relates to the field of signal processing technology, and more specifically, to an audio sound generation system, audio equipment, and vehicle. Background Technology

[0002] External digital audio broadcast receivers, as modular audio devices independent of the in-vehicle infotainment system, are receiving increasing attention in smart car cockpit systems.

[0003] For external digital audio broadcast receivers, existing technologies typically recognize them as general USB audio devices, relying on the system's default audio manager mechanism to switch audio input sources and reuse the system's existing recording / playback pathways to achieve audio output. This method causes the digital audio signal output by the digital audio broadcast receiver to share the same audio bus and focus management mechanism with system audio such as navigation prompts, Bluetooth phone calls, and multimedia playback. This makes it very easy for audio focus contention to cause playback interruptions and sudden volume changes in the digital audio broadcast receiver, severely impacting the user experience.

[0004] There is currently no good solution to the above problems. Summary of the Invention

[0005] This application provides an audio output system, audio device, and vehicle to at least solve the technical problem of how to create a dedicated output channel for an external digital audio broadcast receiver box to avoid interference with other audio outputs.

[0006] According to one aspect of the embodiments of this application, an audio sound generation system is provided, including: a digital audio broadcast receiver box, an intermediate hub, a system-on-a-chip (SoC), an audio bus controller, a power amplifier component, and a speaker; the digital audio broadcast receiver box is connected to the intermediate hub and configured to output digital audio signals to the intermediate hub; the intermediate hub is connected to the SoC and configured to transmit digital audio signals to the SoC; the SoC is connected to the audio bus controller and configured to create a digital audio bus in response to the digital audio signals, receive digital audio signals through the digital audio bus, perform audio processing on the digital audio signals to obtain a first digital audio signal, and send the first digital audio signal to the audio bus controller; the audio bus controller is connected to the power amplifier component and configured to perform signal format conversion on the first digital audio signal to obtain a second digital audio signal, and transmit the second digital audio signal to the power amplifier component; the power amplifier component is connected to the speaker and configured to perform power amplification and digital-to-analog conversion on the second digital audio signal to obtain a target audio signal, and transmit the target audio signal to the speaker; the speaker is configured to output the target audio signal.

[0007] Furthermore, the system-on-a-chip includes a digital signal processor, configured to decode, reduce noise, and equalize digital audio signals to obtain a first digital audio signal.

[0008] Furthermore, the system-on-a-chip also includes: an audio recording component and a service component; the audio recording component is configured to acquire digital audio signals from the digital audio bus and transmit the digital audio signals to the service component; the service component is configured to perform signal analysis on the digital audio signals to obtain target data.

[0009] Furthermore, the system-on-a-chip also includes an application component, which is configured to update the vehicle infotainment interface display based on target data.

[0010] Furthermore, the application component is also configured to receive user operation instructions and send operation requests corresponding to the user operation instructions to the service component.

[0011] Furthermore, the application component is also configured to trigger a recording permission reminder pop-up in response to digital audio signals.

[0012] Furthermore, the intermediate hub includes: a Universal Serial Bus (USB) hub, configured to transmit digital audio signals to the system-on-a-chip via a USB interface.

[0013] Furthermore, the digital signal processor is configured to send the first digital audio signal to the audio bus controller via a time-division multiplexing interface.

[0014] According to another aspect of the embodiments of this application, an audio device is also provided, including: the audio sound generation system in various embodiments of this application.

[0015] According to another aspect of the embodiments of this application, a vehicle is also provided, including: the audio sound generation system of various embodiments of this application.

[0016] This application provides an audio output system, including: a digital audio broadcast receiver box, an intermediate hub, a system-on-a-chip (SoC), an audio bus controller, a power amplifier component, and a speaker; the digital audio broadcast receiver box is connected to the intermediate hub and configured to output digital audio signals to the intermediate hub; the intermediate hub is connected to the SoC and configured to transmit digital audio signals to the SoC; the SoC is connected to the audio bus controller and configured to create a digital audio bus in response to the digital audio signals, receive digital audio signals through the digital audio bus, perform audio processing on the digital audio signals to obtain a first digital audio signal, and send the first digital audio signal to the audio bus controller; the audio bus controller is connected to the power amplifier component and configured to perform signal format conversion on the first digital audio signal to obtain a second digital audio signal, and transmit the second digital audio signal to the power amplifier component; the power amplifier component is connected to the speaker and configured to perform power amplification and digital-to-analog conversion on the second digital audio signal to obtain a target audio signal, and transmit the target audio signal to the speaker; the speaker is configured to output the target audio signal. In the audio output system disclosed in this application, the digital audio signal output by the digital audio broadcast receiver box is transmitted to the system-on-a-chip (SoC) via an intermediate hub. Instead of using a general audio route, the SoC actively creates a dedicated "digital audio bus" in response to the signal, enabling independent reception and processing of the digital audio signal. This isolates the transmission path of the digital audio signal from that of other audio streams at the system level. After processing the digital audio signal, the SoC sends the processed first digital audio signal to the audio bus controller. The audio bus controller receives the first digital audio signal, performs format conversion on it, and outputs it to the power amplifier component, ensuring that the digital audio signal is not interfered with or preempted by other audio sources in the transmission link. The power amplifier component receives and amplifies the second digital audio signal transmitted through this dedicated path to obtain the target audio signal. The target audio signal ultimately output by the speaker originates entirely from the independent path of the digital audio broadcast receiver box and does not share processing or output nodes with other audio sources. In summary, this application achieves physical and logical isolation between the audio output of the external digital audio broadcast receiver box and other in-vehicle audio systems by constructing an end-to-end dedicated digital audio bus path from the digital audio broadcast receiver box to the speaker. This fundamentally avoids conflicts in sound resources and ensures that the audio output of the external digital audio broadcast receiver box is stable, independent, and interference-free. Therefore, this application achieves the technical effect of creating a dedicated sound channel for the external digital audio broadcast receiver box, thereby avoiding interference with other audio outputs, and thus solves the technical problem of how to create a dedicated sound channel for the external digital audio broadcast receiver box to avoid interference with other audio outputs. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a structural block diagram of an audio sound generation system according to an embodiment of this application;

[0019] Figure 2 This is a structural block diagram of a system-on-a-chip according to an embodiment of this application;

[0020] Figure 3 This is a system architecture diagram of an audio sound generation system according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of an audio device according to an embodiment of this application;

[0022] Figure 5 This is an example diagram of a vehicle according to an embodiment of this application. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] This embodiment provides an audio sound generation system. Figure 1 This is a structural block diagram of an audio sound generation system according to an embodiment of this application, such as... Figure 1As shown, the audio output system 100 includes: a digital audio broadcast receiver box 101, an intermediate hub 102, a system-on-a-chip (SoC) 103, an audio bus controller 104, a power amplifier assembly 105, and a speaker 106. The digital audio broadcast receiver box 101 is connected to the intermediate hub 102 and is configured to output digital audio signals to the intermediate hub 102. The intermediate hub 102 is connected to the SoC 103 and is configured to transmit digital audio signals to the SoC 103. The SoC 103 is connected to the audio bus controller 104 and is configured to create a digital audio bus in response to the digital audio signals and receive digital audio signals through the digital audio bus. The system performs audio processing on the digital audio signal to obtain a first digital audio signal and sends the first digital audio signal to the audio bus controller 104. The audio bus controller 104 is connected to the power amplifier component 105 and is configured to perform signal format conversion on the first digital audio signal to obtain a second digital audio signal and transmit the second digital audio signal to the power amplifier component 105. The power amplifier component 105 is connected to the speaker 106 and is configured to perform power amplification and digital-to-analog conversion on the second digital audio signal to obtain a target audio signal and transmit the target audio signal to the speaker 106. The speaker 106 is configured to output the target audio signal.

[0026] The aforementioned digital audio broadcast receiver box is an external device independent of the vehicle's main unit. Its core function is to receive digital audio broadcast signals sent by terrestrial broadcasting stations and decode them back into the original digital audio stream. This device typically has a built-in dedicated tuning circuit, demodulation chip, and decoding processor, and can receive multi-dimensional broadcast data, including stereo, multiple program streams, and text information (such as program names and song titles).

[0027] Unlike traditional solutions that solder the receiver chip directly onto the vehicle's main unit motherboard, this system adopts a box-type external design. This means that the device has an independent casing, power interface, and data interface, which are pluggable and can be replaced or upgraded without disassembling the vehicle's main unit.

[0028] Optionally, the digital audio broadcast receiver box does not output analog audio signals, but directly outputs decoded raw digital audio data in a standard linear pulse code modulation format (i.e., uncompressed PCM format).

[0029] Optionally, the digital audio broadcast receiver box outputs digital audio signals via a USB interface (i.e., Universal Serial Bus interface). This interface not only carries audio data but can also be powered by the vehicle system, enabling plug-and-play functionality.

[0030] In one optional embodiment, the digital audio broadcast receiver box is equipped with a microprocessor for automatically searching for broadcast signals, locking channels, determining signal strength, and correcting errors. When the user selects the digital broadcast function in the vehicle's infotainment system, the digital audio broadcast receiver box automatically starts and begins receiving signals. Its USB interface conforms to the USB audio device class specification, enabling it to be automatically recognized by the system as an audio input device without requiring the installation of a dedicated driver on the host computer.

[0031] The aforementioned intermediate hub is a hardware relay device with multi-port expansion capabilities. Its function is to securely and stably transmit the USB audio data stream (i.e., digital audio signal) from the digital audio broadcast receiver box to the system-on-a-chip.

[0032] Optionally, the intermediate hub has a built-in lightweight control chip that can identify the type of connected device (such as whether it is an audio broadcasting device) and assign a dedicated data transmission channel to the device to avoid communication conflicts with other USB devices (such as USB flash drives, mobile phones, and Bluetooth adapters).

[0033] In addition, the intermediate hub can sense the insertion and removal status of the digital audio broadcast receiver box. When the digital audio broadcast receiver box is inserted, it automatically sends a "device access" signal to the control chip; when the digital audio broadcast receiver box is removed, it immediately shuts down the relevant audio processing path to prevent resource waste.

[0034] Optionally, the intermediate hub integrates a high-speed signal conditioning circuit, which can suppress signal reflection and interference during long-distance USB transmission, ensuring that digital audio signals do not experience frame loss, misalignment, or sampling rate drift during transmission, thus guaranteeing the continuity of the audio stream.

[0035] In one alternative embodiment, the intermediate hub is installed in a dedicated cable tray inside the center console and connected to the receiver box via a customized cable, no longer than 1.5 meters, to maintain signal quality.

[0036] Alternatively, the intermediate hub can be a USB hub.

[0037] The aforementioned system-on-a-chip is the core processing unit of the in-vehicle intelligent cockpit, integrating a central processing unit, memory, graphics processing, audio processing unit, multiple communication interfaces, and operating system kernel.

[0038] In this embodiment, the system-on-a-chip undertakes core tasks such as digital audio signal reception, format recognition, audio processing, and path scheduling.

[0039] In one alternative embodiment, the system-on-a-chip (SoC) dynamically creates a virtual channel called a "digital audio bus" in its internal operating system in response to a digital audio signal. This virtual channel is not a physical line, but rather a group data structure and service interface in the operating system kernel, specifically designed to carry audio streams from the external device, achieving complete isolation from other audio sources (such as navigation voice, Bluetooth music, and telephone calls).

[0040] Optionally, the system-on-a-chip integrates a dedicated audio processing engine that can perform multi-level processing on the input digital audio signal, including noise reduction, equalization adjustment, and sampling rate matching.

[0041] Optionally, noise reduction processing refers to using algorithms to filter out background interference such as wind noise and tire noise caused by the in-vehicle environment, while preserving human voice and music frequency bands.

[0042] Optionally, equalization adjustment refers to targeted enhancement of low, mid, and high frequencies based on a preset broadcast audio optimization curve, so that the broadcast content remains clearly identifiable even at high speeds.

[0043] Optionally, sampling rate matching refers to uniformly resampling the input audio to the system's internal standard audio sampling rate (such as 44.1kHz or 48kHz) to ensure that subsequent processing is distortion-free.

[0044] In addition, the system-on-a-chip has an embedded audio management system that can determine whether other audio sources are currently using the speaker (such as navigation prompts). If a conflict occurs, it will automatically reduce the volume of other audio sources to ensure that broadcast content is played first.

[0045] In one alternative embodiment, the system-on-a-chip (SoC) operates based on a custom audio framework. Upon insertion of the DAB box, the device is first identified via USB enumeration, then a pre-configured audio processing profile is loaded, automatically creating a digital audio bus. This bus is assigned independent priority within the system, and its data stream bypasses a general-purpose audio mixer, directly entering a dedicated processing queue to avoid latency and distortion caused by mixing with other audio components.

[0046] The aforementioned audio bus controller is a key bridge connecting the system-on-a-chip (SoC) and the power amplifier components. Its function is to convert the first digital audio signal output by the SoC into a dedicated format suitable for long-distance, high-interference-resistant transmission and transmit it stably to the back-end power amplifier module.

[0047] Optionally, the system-on-a-chip outputs digital audio data in time-division multiplexed format (i.e., multiple audio channels are transmitted in an interleaved manner in time), while the audio bus controller converts it into a high-fidelity audio bus protocol format specifically designed for automotive environments. This protocol has the following characteristics: supports multi-channel synchronous transmission (such as left, right channels and auxiliary channels); uses differential signal transmission (strong resistance to electromagnetic interference); transmission latency is less than 50 microseconds, meeting real-time playback requirements; and supports daisy-chain connection (can connect multiple power amplifier nodes).

[0048] Optionally, the audio bus controller has a built-in high-precision clock generator to ensure that the audio data is strictly synchronized at the sending and receiving ends, avoiding audio interruptions or pops caused by clock drift.

[0049] In one alternative embodiment, the audio bus controller is connected to the power amplifier assembly via a single twisted-pair shielded cable, up to 5 meters long, suitable for audio distribution in the front and rear seats of large vehicles.

[0050] The audio bus controller and the system-on-a-chip use a high-speed serial interface (such as TDM) with a data transmission rate of no less than 256kbps to ensure lossless transmission of high sampling rate audio.

[0051] The aforementioned power amplifier component is the final stage execution unit of the audio system. Its function is to first convert the digital audio signal (i.e., the second digital audio signal) from the audio bus controller into an analog signal (i.e., digital-to-analog conversion), then amplify the power, and finally drive the speaker to emit sound.

[0052] Optionally, digital-to-analog conversion refers to converting the input digital audio signal into a continuous voltage fluctuation signal through a high-precision digital-to-analog converter.

[0053] Optionally, a 24-bit precision conversion chip with a dynamic range greater than 110 dB is used to ensure complete reproduction of everything from the most subtle speech to the loudest music.

[0054] Optionally, the power amplifier assembly contains multiple independent amplifier circuits that can drive the four channels (front left, front right, rear left, and rear right) respectively to achieve stereo or surround sound effects. Each channel has independent gain adjustment and protection circuits (such as overcurrent, overheat, and short-circuit protection).

[0055] Optionally, the power amplifier assembly is installed in a location away from electromagnetic interference sources, such as the vehicle chassis or trunk, and its housing is made of metal shielding material. Its input terminal connects to the audio bus controller via an aviation connector to ensure reliable contact under long-term vibration conditions.

[0056] The aforementioned loudspeaker is the final output terminal of the entire system. Its function is to convert the electrical signal output by the power amplifier into a sound wave signal that can be perceived by the human ear.

[0057] Optionally, the loudspeaker includes a tweeter (for reproducing the vocals and high-frequency details of the broadcast), a midrange driver (for reproducing the main body of the music and speech), and a bass driver (for enhancing the fullness of the broadcast content), all of which work together through a crossover network.

[0058] Optionally, the speaker has a built-in sound sensor that can detect changes in temperature, humidity and number of passengers in the cabin, and automatically adjust the output frequency response curve to ensure that the broadcast sound remains clear and natural under different operating conditions such as full load, empty load, and air conditioning on.

[0059] Optionally, the speakers are positioned on the front door panels and dashboard according to the "front sound field positioning" principle to ensure that the broadcast sound comes from in front of the driver, conforming to auditory habits. All speakers are waterproof and dustproof, meeting automotive-grade protection standards.

[0060] The speakers are positioned on the front door panels and dashboard according to the "front sound field positioning" principle, ensuring that the broadcast sound comes from in front of the driver, which conforms to human hearing habits. All speakers are waterproof and dustproof, meeting the automotive-grade P54 protection level.

[0061] For example, when a user inserts the digital audio broadcast receiver box into the USB port of the central control unit, the intermediate hub detects the device connection and sends a device identification signal to the system-on-a-chip (SoC). The SoC loads a preset configuration file, creates a "digital audio bus" channel, and simultaneously displays a custom permission explanation interface (not the system default pop-up), informing the user in graphic and textual form: "This device is only used to receive broadcast programs; it will not record your voice or upload any data. Playback is only permitted after confirmation." After user confirmation, the user requests underlying recording permissions. The PCM audio stream output from the receiver box is transmitted to the system and SoC via the hub. The SoC initiates noise reduction, equalization, and sampling rate matching processes, outputting the processed audio. The processed audio is sent to the audio bus controller via the TDM interface, converted to a high interference immunity protocol format, and then transmitted to the back-end power amplifier component via a single twisted pair cable. The power amplifier component performs digital-to-analog conversion and power amplification, driving the four-channel speakers to produce sound. When the user turns off the broadcast function or unplugs the receiver box, the system automatically shuts down the digital audio bus, releases related resources, and stops all background processing.

[0062] It is easy to understand that this application achieves seamless, stable, and high-fidelity audio transmission between external digital audio broadcasting equipment and the intelligent cockpit platform by constructing a dedicated sound transmission path that is completely independent of the traditional audio path.

[0063] This application provides an audio output system, including: a digital audio broadcast receiver box, an intermediate hub, a system-on-a-chip (SoC), an audio bus controller, a power amplifier component, and a speaker; the digital audio broadcast receiver box is connected to the intermediate hub and configured to output digital audio signals to the intermediate hub; the intermediate hub is connected to the SoC and configured to transmit digital audio signals to the SoC; the SoC is connected to the audio bus controller and configured to create a digital audio bus in response to the digital audio signals, receive digital audio signals through the digital audio bus, perform audio processing on the digital audio signals to obtain a first digital audio signal, and send the first digital audio signal to the audio bus controller; the audio bus controller is connected to the power amplifier component and configured to perform signal format conversion on the first digital audio signal to obtain a second digital audio signal, and transmit the second digital audio signal to the power amplifier component; the power amplifier component is connected to the speaker and configured to perform power amplification and digital-to-analog conversion on the second digital audio signal to obtain a target audio signal, and transmit the target audio signal to the speaker; the speaker is configured to output the target audio signal.

[0064] In the audio output system disclosed in this application, the digital audio signal output by the digital audio broadcast receiver box is transmitted to the system-on-a-chip (SoC) via an intermediate hub. Instead of using a general audio route, the SoC actively creates a dedicated "digital audio bus" in response to the signal, enabling independent reception and processing of the digital audio signal. This isolates the transmission path of the digital audio signal from that of other audio streams at the system level. After processing the digital audio signal, the SoC sends the processed first digital audio signal to the audio bus controller. The audio bus controller receives the first digital audio signal, performs format conversion on it, and outputs it to the power amplifier component, ensuring that the digital audio signal is not interfered with or preempted by other audio sources in the transmission link. The power amplifier component receives and amplifies the second digital audio signal transmitted through this dedicated path to obtain the target audio signal. The target audio signal ultimately output by the speaker originates entirely from the independent path of the digital audio broadcast receiver box and does not share processing or output nodes with other audio sources.

[0065] In summary, this application achieves physical and logical isolation between the audio output of the external digital audio broadcast receiver box and other in-vehicle audio systems by constructing an end-to-end dedicated digital audio bus path from the digital audio broadcast receiver box to the speaker. This fundamentally avoids conflicts in sound resources and ensures that the audio output of the external digital audio broadcast receiver box is stable, independent, and interference-free. Therefore, this application achieves the technical effect of creating a dedicated sound channel for the external digital audio broadcast receiver box, thereby avoiding interference with other audio outputs, and thus solves the technical problem of how to create a dedicated sound channel for the external digital audio broadcast receiver box to avoid interference with other audio outputs.

[0066] The audio sound generation system in the embodiments of this application will be further described below.

[0067] Optionally, the system-on-a-chip includes: a digital signal processor, configured to decode, reduce noise, and equalize the digital audio signal to obtain a first digital audio signal.

[0068] The aforementioned digital signal processor is a microprocessor architecture specifically designed for high-speed, high-precision, and real-time digital audio processing, unlike general-purpose processors (such as application processors in mobile phones).

[0069] Digital signal processors (DSPs) possess the following key structural features: a hardware multiply-accumulate unit with multiple parallel processing units, capable of performing multiple multiplication and addition operations within a single clock cycle, crucial for mathematical operations such as audio signal filtering and spectral transformation; a Harvard bus architecture with completely separated instruction and data storage spaces, allowing simultaneous reading of instructions and data, significantly improving processing throughput and avoiding "data congestion"; fixed-point arithmetic optimization, employing a numerical representation method with a fixed decimal point position, greatly reducing power consumption and hardware complexity while ensuring sufficient accuracy, making it more suitable for embedded automotive environments; a dedicated instruction set, with built-in dedicated instructions for audio processing, such as Fast Fourier Transform, window function superposition, and convolution operations, enabling operations that traditionally require dozens of instructions to be completed with a single instruction; and a low-latency pipeline, with its internal execution units employing a deep pipeline design, where each processing stage operates independently and in parallel, achieving the processing of hundreds of audio sampling points per millisecond, meeting the stringent real-time requirements of automotive sound fields (latency less than 20 milliseconds).

[0070] The aforementioned decoding refers to the process of restoring the compressed digital audio data stream transmitted from an external DAB box via USB into the original uncompressed pulse code modulation audio sample sequence.

[0071] Optionally, the DAB box outputs a bitstream that has been compressed and encoded according to standard standards. Essentially, it compresses the original audio signal in the frequency domain according to the psychoacoustic model, removing redundant information that is not easily perceived by the human ear, thereby greatly reducing the transmission bandwidth requirements.

[0072] Optionally, the decoding process includes: bitstream parsing, Huffman inverse mapping, frequency domain reconstruction, quantization restoration, and channel separation and interleaving.

[0073] Optionally, bitstream parsing refers to reading the frame header information of the input data packet, identifying the encoding format, sampling rate (e.g., 48kHz), number of channels (2 channels for stereo), bit rate, and other key parameters.

[0074] Optionally, Huffman inverse mapping refers to variable-length encoding restoration of compressed data, restoring frequently occurring short codewords to their original spectral coefficients.

[0075] Optionally, frequency domain reconstruction refers to restoring the compressed frequency domain coefficients to time domain audio sampling points through inverse fast Fourier transform.

[0076] Optionally, quantization restoration refers to restoring quantized sampled values ​​(such as 12-bit precision) to the original 16-bit or 24-bit high-precision samples, thereby restoring the dynamic range.

[0077] Optionally, channel separation and interleaving refers to the synchronous recombination of left and right channel data to form a standard alternating sampling sequence of left and right channels.

[0078] In one alternative embodiment, a double-buffered decoding mechanism is employed, where one buffer is used to receive new data packets and the other is used for real-time decoding output, with the two switching alternately. This ensures that the decoding process is never interrupted, maintaining audio continuity even during brief jitter in USB transmission, avoiding interruptions or pops.

[0079] The aforementioned noise reduction refers to the process of actively identifying and suppressing environmental noise components while maintaining speech clarity and music integrity.

[0080] Optionally, noise reduction includes: noise source analysis and noise reduction processing.

[0081] Optionally, in an automotive environment, the main noises include: engine operating noise (low frequency 10-100Hz), wind noise (mid frequency 200-1000Hz), tire friction noise (wideband impact diaphragm noise), and air conditioning fan hum (high frequency 500-3000Hz), etc.

[0082] Alternatively, noise reduction is achieved through adaptive filter banks, reference noise sampling, spectral subtraction algorithms, nonlinear threshold control, and the utilization of the human ear masking effect.

[0083] Alternatively, an adaptive filter bank refers to a network built into the system consisting of multiple finite impulse response filters with adjustable parameters.

[0084] Optionally, reference noise sampling refers to collecting ambient noise as a reference signal using an in-vehicle microphone (which can be integrated into the vehicle's infotainment system or integrated into a DAB box) and comparing it with the audio signal.

[0085] Alternatively, the spectrum subtraction algorithm refers to estimating the noise spectrum in the frequency domain and subtracting the estimated value from the original audio spectrum to preserve the main energy regions of speech and music.

[0086] Optionally, nonlinear threshold control refers to setting an adaptive threshold for low-energy frequency bands, allowing passage only when the signal strength is higher than a certain threshold of the noise floor, thus preventing "noise residue" or "speech distortion".

[0087] Optionally, the use of the human ear masking effect refers to enhancing the signal gain in the frequency band (2-5kHz) that the human ear is sensitive to, while appropriately attenuating low-frequency noise that the human ear is not sensitive to, in order to achieve "subjective listening optimization" rather than "objective data purity" based on psychoacoustic models.

[0088] Optionally, a dual-channel collaborative noise reduction strategy can be adopted, that is, the forward channel is used for real-time noise reduction and the backward channel is used for long-term noise modeling.

[0089] The aforementioned equalization process refers to precisely compensating the audio frequency response curve based on the acoustic environment inside the car (such as seat layout, body material, and speaker position) so that the final output sound conforms to human auditory preferences.

[0090] Optionally, the purpose of equalizing the signal is to eliminate problems such as "dull bass", "muffled midrange" and "harsh treble" caused by vehicle body resonance, uneven speaker frequency response, and sound field distortion at passenger positions.

[0091] Optionally, equalization processing is achieved by combining a multi-segment adjustable filter array, preset sound field modes, automatic sound field calibration, dynamic equalization, and user-defined memory.

[0092] The aforementioned multi-segment adjustable filter array refers to a system with 10-16 independent digital filters, each covering a specific frequency band and supporting independent adjustment of gain, bandwidth, and center frequency.

[0093] The aforementioned preset sound field modes refer to the pre-loaded multiple listening modes (such as cinema mode, clear speech mode, and natural balance mode), each mode corresponding to a set of optimized filter parameters.

[0094] The aforementioned automatic sound field calibration refers to the ability to automatically measure the response curve of each speaker at the passenger's ear position through built-in test tones and microphone feedback, and then generate a supplementary curve in reverse.

[0095] The aforementioned dynamic balancing refers to automatically adjusting the balancing parameters based on changes in vehicle speed (obtained via the CAN bus).

[0096] For example, low frequencies are enhanced at high speeds to counteract wind noise, while mid-to-high frequencies are boosted at low speeds to enhance speech clarity.

[0097] The aforementioned personalized memory refers to the ability to store different drivers' preference settings (such as Zhang San's preference for low frequencies), which will be automatically loaded the next time the computer is started.

[0098] Optionally, it supports dual-channel switching of equalization mode using physical buttons and voice commands.

[0099] Optionally, the system-on-a-chip may also include: an audio recording component and a service component; the audio recording component is configured to acquire digital audio signals from a digital audio bus and transmit the digital audio signals to the service component; the service component is configured to perform signal analysis on the digital audio signals to obtain target data.

[0100] Optionally, the audio recording component is a hardware-software co-processing unit dedicated to capturing digital audio broadcast signals. Embedded within the system-on-a-chip, this component connects directly to a USB digital audio interface, a TDM (Time Division Multiplexing) bus, or a dedicated digital audio link. Its function is to continuously monitor and actively capture raw digital audio streams transmitted from an external DAB (Digital Audio Block) box.

[0101] The audio recording component includes a low-level driver that can recognize the audio data packet format of a specific device and has data buffering and time synchronization capabilities to ensure that the audio stream is transmitted without frame loss or out of order. In addition, the component has a built-in dynamic sampling rate detection mechanism that can automatically identify the audio sampling frequency output by the external device and adjust the internal processing parameters in real time to avoid noise, stuttering, or distortion caused by frequency mismatch.

[0102] The audio recording component operates in a "passive monitoring + active data acquisition" mode, only initiating data acquisition after the system confirms that the DAB box is connected and ready, thus avoiding resource waste.

[0103] The aforementioned service components are responsible for performing deep structuring processing on the raw digital audio stream.

[0104] After receiving the raw digital audio data transmitted by the audio recording component, the service component first performs frame structure identification, that is, determines whether the data conforms to the protocol specifications of digital audio broadcasting, such as whether it is the frame header specified by the DAB standard, and the arrangement of padding bytes and audio blocks. Subsequently, its built-in audio decoding engine parses the data blocks frame by frame, extracts the audio sampling point sequence, and performs fault tolerance repair in combination with error correction codes to ensure that clear audio can still be output in weak signal environments.

[0105] Building upon this, the service component further parses additional broadcast information, such as radio station name, program type, timestamp, traffic information, and other metadata, and structures it into identifiable "target data." This target data is stored in standard data structures (such as local cached objects in / SON format) for use by upper-layer applications.

[0106] For example, displaying the radio station name on the central control screen, triggering traffic warning prompts, and binding voice command keywords.

[0107] Optionally, the service component also has status monitoring capabilities, which can detect abnormal situations such as data stream interruption and abnormal device disconnection, and automatically trigger reconnection mechanisms or degradation processing strategies to ensure the continuity of user experience.

[0108] In summary, this application achieves full-stack autonomous processing of external DAB devices from raw digital signals to semantic target data by constructing a dedicated processing link of "audio recording component - service component." This overcomes the drawbacks of traditional solutions that rely on the host system's general audio framework, resulting in limited functionality, poor compatibility, and slow response. This architecture ensures high-fidelity, low-latency output of digital broadcast audio.

[0109] Optionally, the system-on-a-chip also includes an application component, configured to update the vehicle infotainment interface display based on target data.

[0110] This application component is a dedicated functional module built into the system chip, scheduled by the operating system at the lower level, and characterized by high priority and strong real-time performance. It works directly with the audio processing framework, user interface rendering engine, system state manager, and external device communication interface to transform real-time broadcast data from the external DAB box, including station name, program type, current music title, signal strength, time information, emergency broadcast indicators, etc., into visually perceptible content on the vehicle's infotainment screen after structured parsing, and ensures that the updates of this content are strictly synchronized with audio playback behavior.

[0111] The target data consists of metadata extracted by the service component during the audio signal decoding process. This metadata is defined by the digital broadcast protocol standard and includes structured fields such as station identification, program service name, text information blocks, time segments, and emergency warning flags. Application components in the system-on-a-chip receive this data through a dedicated memory-mapped channel reserved by the kernel driver layer to ensure that data transmission does not pass through ordinary application buffers, preventing preemption or delay by other processes.

[0112] Secondly, the application component has a built-in semantic parsing engine with a mapping table of national broadcast data format specifications. This engine can automatically convert the original hexadecimal encoded metadata into Chinese semantic text. The parsing process does not rely on cloud services and is completed entirely within the local chip to ensure that information can be displayed normally in environments without network access, such as tunnels and remote areas.

[0113] In addition, the application component allows users to customize display preferences, such as choosing to only show the radio station name, hide the music title, or enable the "auto lock current station" function.

[0114] Optionally, the application also has a history function, which automatically saves information and icons of the five most recently listened to radio stations. Users can bring up a quick switching menu by long-pressing the radio icon to listen to the stations with one click.

[0115] Optionally, the application component is also equipped with an intelligent refresh strategy. When the DAB signal strength is detected to be lower than a preset threshold, the application component will actively fade out the currently displayed program information and display a semi-transparent message in the corner of the screen stating "Weak signal, information may be delayed" to avoid misleading the user. When an emergency broadcast signal is received, the application component will immediately interrupt the current interface display and force a full-screen red warning box to pop up, containing text descriptions and synchronized audio prompts, ensuring that the driver can obtain critical information immediately in an emergency.

[0116] In summary, this application achieves deep collaboration between external DAB devices and the vehicle's infotainment system at the visual interaction level by embedding a dedicated application component within the system-on-a-chip. This component parses broadcast metadata in a localized, low-latency, and highly reliable manner, dynamically generating ergonomically designed interface content.

[0117] Optionally, the application component is also configured to receive user operation instructions and send operation requests corresponding to the user operation instructions to the service component.

[0118] Optionally, when a user clicks a channel button on the screen, the operating system's underlying touchscreen driver converts the physical coordinates into touch events and transmits them to the application component's event handler via the event dispatch bus. This handler, based on the preset interface layout and control binding relationships, determines which functional control the currently clicked area belongs to, and then extracts the operation intent. For example, clicking the "Previous Channel" button will be recognized as a "Channel Up" operation. Simultaneously, it records the current time and user identity (if multi-user mode is enabled), and verifies whether the operation conditions are met (such as whether the DAB box has been successfully connected and whether it is in playback mode). This process is not simply triggered but includes detailed processing such as input validity verification, anti-misclick filtering, and continuous operation debouncing to ensure that every user click is accurately and stably captured, avoiding misoperations caused by gesture misjudgment or screen interference.

[0119] Sending operation requests corresponding to user operation instructions to service components is the key bridge in the entire control chain.

[0120] The operation requests issued by the application component do not directly invoke the hardware. Instead, they are encapsulated into standardized request packets through inter-process communication mechanisms. These packets contain an opcode, a parameter list, a security token (for authorization verification), and a callback address (for returning the execution result). Upon receiving the request, the service component first parses the opcode to determine whether it belongs to channel switching, volume adjustment, signal strength query, or other functions. Then, it performs resource scheduling based on the current system status (such as whether the DAB box is online or whether the audio bus is occupied by other applications).

[0121] For example, if a user requests to switch channels, the service component will first pause the currently playing audio stream, send a channel tuning command to the DAB box, wait for it to return a lock signal, then start the audio data receiving channel, and finally, after confirming the playback status, send feedback to the application component to indicate "playback successful" or "weak signal, please try again".

[0122] Optionally, the application component is also configured to trigger a recording permission reminder pop-up in response to a digital audio signal.

[0123] The application component is also set to respond to digital audio signals and trigger a recording permission reminder pop-up. Its core is to build a human-computer interaction security mechanism. By actively intervening in the user authorization process before receiving the digital broadcast audio data stream at the system level, it ensures that the user voluntarily grants the system access to the audio input channel under the premise that the user clearly understands the purpose of the function.

[0124] In one alternative embodiment, when the DAB box is inserted into the USB interface, the kernel driver first identifies the device type and confirms that it is a valid audio input device. Then, the audio hardware abstraction layer reports an "audio stream pending access" event to the application component, at which point it enters a waiting authorization state.

[0125] Upon receiving the event, the application component immediately invokes the system UI service to load a pre-designed pop-up resource package. This resource package includes high-definition icons (such as a digital broadcast antenna graphic), three text descriptions (explaining the purpose of the function, the scope of data processing, and privacy protection measures), and two buttons: "OK" and "Cancel". The pop-up style adopts a dark mode to adapt to the in-vehicle environment, with enlarged fonts and enhanced contrast to ensure that the driver can still read clearly under changing lighting conditions.

[0126] The system's default permission declaration pop-up is forcibly blocked by the application component through the interface provided by the operating system, ensuring that users do not see a vague or general system message. All authorization processes are led by a customized pop-up, avoiding accidental rejection by users due to misunderstanding.

[0127] When the user clicks "OK", the application component immediately sends a legitimate authorization request to the system permission manager. After verifying that the request source is trustworthy and the purpose is compliant, the system grants read permission to the audio input channel and persistently stores the permission status to avoid duplicate requests. If the user clicks "Cancel", the system will not only refuse authorization, but also actively close the audio data channel of the DAB device to prevent resource waste and misoperation.

[0128] Optionally, the intermediate hub includes: a Universal Serial Bus (USB) hub, configured to transmit digital audio signals to the system-on-a-chip via a USB interface.

[0129] A Universal Serial Bus (USB) hub is a hardware repeater device with multi-port expansion capabilities. Essentially, it's a multi-USB communication hub embedded in the automotive electronic architecture, providing power management, signal shaping, and protocol forwarding functions. It connects to an external DAB box via a standard physical interface and simultaneously provides multiple independent data channels to the system-on-a-chip (SoC).

[0130] Optionally, the digital signal processor is configured to send the first digital audio signal to the audio bus controller via a time-division multiplexing interface.

[0131] A time-division multiplexing interface consists of a set of physical pins that transmit multiple independent audio data channels on the same set of wires through precise time division. Specifically, the system divides each second into several tiny time segments, and only one channel's data is allowed to be transmitted through the interface within each segment. Data from all channels cyclically occupies these time segments in a fixed order.

[0132] Optionally, Figure 2 This is a structural block diagram of a system-on-a-chip according to an embodiment of this application, such as... Figure 2 As shown, the system-on-a-chip 103 includes: a digital signal processor 201, an audio recording component 202, a service component 203, and an application component 204.

[0133] Optionally, Figure 3 This is a system architecture diagram of an audio sound generation system according to an embodiment of this application, such as... Figure 3As shown, the audio output system includes: a digital audio broadcast receiver box (DAB box), a hub, an audio bus controller, a power amplifier, and a system-on-a-chip (SoC). The SoC includes a central processing unit (CPU) and a high-fidelity digital signal processor (DSN) (driven via USB, unable to recognize the hub). The CPU includes: an application layer (including DAB applications), a service layer (including DAB services), a framework layer (including audio recording and playback modules), a hardware abstraction layer (including the digital audio bus), and a kernel driver (including the hub driver and the pulse code modulation sound card). The digital audio signal output from the DAB box is transmitted to the USB hub via a USB interface (Universal Serial Bus interface), and the USB hub transmits the digital audio signal to the SoC via the USB interface.

[0134] Optionally, the generation path of the digital audio broadcast receiver box uses a hardware abstraction layer to add a digital audio bus, sending pulse code modulation sound card data to the upper layer every 20ms, and the audio recording module records and sends the recordings to the DAB service for calling.

[0135] Optionally, the audio processing system in this application embodiment, particularly a sound transmission path system for digital audio broadcasting applications, is suitable for embedded audio devices, car audio systems, or high-fidelity audio processing devices.

[0136] In one alternative embodiment, the DAB box is connected to the system-on-a-chip (SoC) via a USB hub, and the final audio signal is transmitted to the amplifier output via the A2B bus (i.e., the audio bus). The external DAB box generates a digital audio signal, which is transmitted to the USB hub via a USB interface. If the hub is identifiable (driver compatibility required), the signal is received by the USB driver of a high-fidelity digital signal processor (HDD). The audio data undergoes high-fidelity processing (such as noise reduction, equalization, and decoding) by the HDD. The HDD sends the processed audio data to the audio bus controller via a TDM (Time Division Multiplexing) interface. The A2B module converts the TDM data to the A2B protocol format and transmits it to the remote amplifier via a single twisted-pair cable. The A2B bus supports multi-node connections and enables synchronous low-latency transmission (typical latency <50μs). The amplifier receives the A2B data, performs digital-to-analog conversion (DAC) and power amplification. Finally, it drives the speakers to produce sound, completing the entire sound production path.

[0137] Furthermore, since the aforementioned pathways involve recording permissions, in mobile applications, when sensitive permissions (such as recording permissions) are invoked, the system's default permission request pop-up usually lacks specific usage scenario explanations, leading users to refuse authorization due to misunderstanding the purpose of the permission, thus affecting the normal use of the function. In existing technologies, the permission request process does not fully incorporate contextual prompts, resulting in poor user experience. To address this, a custom pop-up explanation should be added to the function triggering pathways involving recording permissions. This explanation should clearly state the purpose and scenario of the permission's use through a combination of text and images, and the system-level permission request should only be triggered after the user confirms their understanding. The specific purpose of the recording permission should be clearly stated in the pre-explanation pop-up (e.g., "only for speech recognition and translation, no background recording"). Users are more likely to authorize the permission after being fully informed, ensuring the usability of the function. When a user's operation triggers a function pathway involving recording permissions (such as clicking the voice input button), it should first check whether recording permissions have been authorized. If not authorized, the system's default permission request pop-up should be blocked, and the custom explanation pop-up should be displayed first.

[0138] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0139] According to another aspect of the embodiments of this application, an audio device is also provided, including: the audio sound generation system in various embodiments of this application.

[0140] Optionally, Figure 4 This is a schematic diagram of an audio device according to an embodiment of this application, such as... Figure 4 As shown, the audio device 400 includes: an audio sound-generating system 100.

[0141] Optionally, the aforementioned audio output system includes: a digital audio broadcast receiver box, an intermediate hub, a system-on-a-chip (SoC), an audio bus controller, a power amplifier component, and a speaker; the digital audio broadcast receiver box is connected to the intermediate hub and configured to output digital audio signals to the intermediate hub; the intermediate hub is connected to the SoC and configured to transmit digital audio signals to the SoC; the SoC is connected to the audio bus controller and configured to create a digital audio bus in response to the digital audio signals, receive digital audio signals through the digital audio bus, perform audio processing on the digital audio signals to obtain a first digital audio signal, and send the first digital audio signal to the audio bus controller; the audio bus controller is connected to the power amplifier component and configured to perform signal format conversion on the first digital audio signal to obtain a second digital audio signal, and transmit the second digital audio signal to the power amplifier component; the power amplifier component is connected to the speaker and configured to perform power amplification and digital-to-analog conversion on the second digital audio signal to obtain a target audio signal, and transmit the target audio signal to the speaker; the speaker is configured to output the target audio signal.

[0142] Optionally, the system-on-a-chip includes: a digital signal processor, configured to decode, reduce noise, and equalize the digital audio signal to obtain a first digital audio signal.

[0143] Optionally, the system-on-a-chip may also include: an audio recording component and a service component; the audio recording component is configured to acquire digital audio signals from a digital audio bus and transmit the digital audio signals to the service component; the service component is configured to perform signal analysis on the digital audio signals to obtain target data.

[0144] Optionally, the system-on-a-chip also includes an application component, configured to update the vehicle infotainment interface display based on target data.

[0145] Optionally, the application component is also configured to receive user operation instructions and send operation requests corresponding to the user operation instructions to the service component.

[0146] Optionally, the application component is also configured to trigger a recording permission reminder pop-up in response to a digital audio signal.

[0147] Optionally, the intermediate hub includes: a Universal Serial Bus (USB) hub, configured to transmit digital audio signals to the system-on-a-chip via a USB interface.

[0148] Optionally, the digital signal processor is configured to send the first digital audio signal to the audio bus controller via a time-division multiplexing interface.

[0149] According to another aspect of the embodiments of this application, a vehicle is also provided, including: the audio sound generation system of various embodiments of this application.

[0150] Optionally, Figure 5 This is an example diagram of a vehicle according to an embodiment of this application, such as... Figure 5 As shown, vehicle 500 includes: audio sound system 100.

[0151] Optionally, the aforementioned audio output system includes: a digital audio broadcast receiver box, an intermediate hub, a system-on-a-chip (SoC), an audio bus controller, a power amplifier component, and a speaker; the digital audio broadcast receiver box is connected to the intermediate hub and configured to output digital audio signals to the intermediate hub; the intermediate hub is connected to the SoC and configured to transmit digital audio signals to the SoC; the SoC is connected to the audio bus controller and configured to create a digital audio bus in response to the digital audio signals, receive digital audio signals through the digital audio bus, perform audio processing on the digital audio signals to obtain a first digital audio signal, and send the first digital audio signal to the audio bus controller; the audio bus controller is connected to the power amplifier component and configured to perform signal format conversion on the first digital audio signal to obtain a second digital audio signal, and transmit the second digital audio signal to the power amplifier component; the power amplifier component is connected to the speaker and configured to perform power amplification and digital-to-analog conversion on the second digital audio signal to obtain a target audio signal, and transmit the target audio signal to the speaker; the speaker is configured to output the target audio signal.

[0152] Optionally, the system-on-a-chip includes: a digital signal processor, configured to decode, reduce noise, and equalize the digital audio signal to obtain a first digital audio signal.

[0153] Optionally, the system-on-a-chip may also include: an audio recording component and a service component; the audio recording component is configured to acquire digital audio signals from a digital audio bus and transmit the digital audio signals to the service component; the service component is configured to perform signal analysis on the digital audio signals to obtain target data.

[0154] Optionally, the system-on-a-chip also includes an application component, configured to update the vehicle infotainment interface display based on target data.

[0155] Optionally, the application component is also configured to receive user operation instructions and send operation requests corresponding to the user operation instructions to the service component.

[0156] Optionally, the application component is also configured to trigger a recording permission reminder pop-up in response to a digital audio signal.

[0157] Optionally, the intermediate hub includes: a Universal Serial Bus (USB) hub, configured to transmit digital audio signals to the system-on-a-chip via a USB interface.

[0158] Optionally, the digital signal processor is configured to send the first digital audio signal to the audio bus controller via a time-division multiplexing interface.

[0159] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0160] In this application, "multiple" refers to two or more.

[0161] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0162] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0163] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0164] In the embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0165] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0166] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0167] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0168] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An audio sound generation system, characterized in that, include: Digital audio broadcast receiver box, intermediate hub, system-on-a-chip, audio bus controller, power amplifier components and speakers; The digital audio broadcast receiver box is connected to the intermediate hub and is configured to output digital audio signals to the intermediate hub; The intermediate hub is connected to the system-on-a-chip and is configured to transmit the digital audio signal to the system-on-a-chip. The system-on-a-chip is connected to the audio bus controller and is configured to create a digital audio bus in response to the digital audio signal, receive the digital audio signal through the digital audio bus, perform audio processing on the digital audio signal to obtain a first digital audio signal, and send the first digital audio signal to the audio bus controller. The audio bus controller is connected to the power amplifier component and is configured to convert the signal format of the first digital audio signal to obtain a second digital audio signal, and to transmit the second digital audio signal to the power amplifier component. The power amplifier component is connected to the speaker and is configured to amplify and convert the second digital audio signal into a digital-to-analog signal to obtain a target audio signal, and to transmit the target audio signal to the speaker. The speaker is configured to output the target audio signal.

2. The audio sound generation system according to claim 1, characterized in that, The system-on-a-chip includes a digital signal processor, which is configured to decode, reduce noise, and equalize the digital audio signal to obtain the first digital audio signal.

3. The audio sound generation system according to claim 1, characterized in that, The system-on-a-chip also includes: audio recording components and service components; The audio recording component is configured to acquire the digital audio signal from the digital audio bus and transmit the digital audio signal to the service component; The service component is configured to perform signal analysis on the digital audio signal to obtain target data.

4. The audio sound generation system according to claim 3, characterized in that, The system-on-a-chip also includes an application component, which is configured to update the vehicle infotainment interface display based on the target data.

5. The audio sound generation system according to claim 4, characterized in that, The application component is further configured to receive user operation instructions and send operation requests corresponding to the user operation instructions to the service component.

6. The audio sound generation system according to claim 4, characterized in that, The application component is also configured to trigger a recording permission reminder pop-up in response to the digital audio signal.

7. The audio sound generation system according to claim 1, characterized in that, The intermediate hub includes a Universal Serial Bus (USB) hub, which is configured to transmit the digital audio signal to the system-on-a-chip via a USB interface.

8. The audio sound generation system according to claim 2, characterized in that, The digital signal processor is configured to send the first digital audio signal to the audio bus controller via a time-division multiplexing interface.

9. An audio device, characterized in that, include: The audio sound generation system according to any one of claims 1 to 8.

10. A vehicle, characterized in that, include: The audio sound generation system according to any one of claims 1 to 8.

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