Audio processing system supporting vehicle-mounted karaoke and vehicle

Abstract

The utility model provides an audio processing system supporting vehicle-mounted karaoke and a vehicle, the audio processing system comprises an audio processor with a voice separation function, a power amplifier module and a loudspeaker, and the audio processor is connected with a vehicle-mounted information entertainment system or an intelligent cabin area controller. The microphone is not connected with the audio processing system after passing through the vehicle-mounted information entertainment system, but is directly connected with the audio processor. Based on the structure, the transmission path of the microphone audio signal is greatly simplified, and the audio delay is effectively reduced. And an audio processor with a human voice separation function is utilized to process a second audio signal acquired by the microphone and an audio signal output by the vehicle-mounted information entertainment system or the intelligent cockpit domain controller, and then a loudspeaker is driven to make a sound through a power amplifier module. Therefore, dependence on external equipment such as a vehicle machine is reduced, occupation of system resources is reduced, and the human voice separation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted equipment technology, and in particular to an audio processing system and vehicle that support in-vehicle karaoke. Background Technology

[0002] In the field of automotive audio systems and in-vehicle entertainment systems, as consumers' demands for in-car entertainment experiences continue to rise, many car manufacturers have offered in-car karaoke functions, which have been widely welcomed by consumers.

[0003] However, most current in-vehicle audio systems face numerous challenges in implementing domestically produced karaoke functionality. For example, in microphone audio signal processing, existing solutions typically connect the microphone to the vehicle's infotainment system, which then transmits the signal to the in-vehicle audio system. This multi-stage transmission method not only increases the complexity of signal transmission but also results in high audio latency, making it difficult to meet users' demands for high-quality and convenient in-vehicle karaoke. Utility Model Content

[0004] In view of this, the present invention provides an audio processing system and vehicle that supports in-vehicle karaoke, which simplifies the transmission path of microphone audio signals and reduces audio latency.

[0005] This utility model provides an audio processing system that supports in-vehicle karaoke, the audio processing system comprising: an audio processor with voice separation function, a power amplifier module, and a speaker;

[0006] The audio processor is connected to the in-vehicle infotainment system or the smart cockpit domain controller and is used to receive the first audio signal output by the in-vehicle infotainment system or the smart cockpit domain controller;

[0007] The audio processor is also connected to a microphone to receive a second audio signal collected by the microphone and to process the first and second audio signals.

[0008] The audio processor has a TDM interface, which is connected to the power amplifier module to output the processed audio signal to the power amplifier module for power amplification.

[0009] The power amplifier module is connected to the speaker and is used to play the amplified audio signal through the speaker.

[0010] In one embodiment, the microphone is a wireless microphone, and the audio processing system further includes a wireless receiving module; the wireless microphone is connected to the audio processor through the wireless receiving module.

[0011] In one embodiment, the wireless receiving module is a 2.4G wireless receiving module, which includes a ZG-M100 chip, an antenna, and a matching circuit. The antenna is connected to a pin of the ZG-M100 chip through the matching circuit. The matching circuit includes a first inductor, a first capacitor, and a second capacitor. One end of the first capacitor is connected to one end of the first inductor and the antenna connection port, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the other end of the first inductor and the ANT pin of the ZG-M100 chip, and the other end of the second capacitor is grounded.

[0012] In one embodiment, the wireless receiving module further includes a crystal oscillator circuit, which includes a crystal oscillator, a third capacitor, a fourth capacitor, a first resistor, and a second resistor. The third capacitor is connected to one end of the crystal oscillator and the first end of the first resistor and grounded. The first end of the first resistor is also connected to the output pin of the ZG-M100 chip. The fourth capacitor is connected to the other end of the crystal oscillator, the first end of the second resistor, and the second end of the first resistor and grounded. The second end of the second resistor is connected to the input pin of the ZG-M100 chip.

[0013] In one embodiment, the audio processing system further includes: an A2B bus communication module, a wired microphone, and / or a gravity sensor;

[0014] The A2B bus communication module includes an A2B master node and at least one A2B slave node;

[0015] The in-vehicle infotainment system is connected to the A2B master node via a cable, and the A2B master node is connected to the audio processor via a TDM interface;

[0016] The wired microphone and / or gravity sensor are connected to the A2B slave node via a cable, and the A2B slave node is connected to the audio processor via the TDM interface.

[0017] In one embodiment, the audio processing system further includes an MCU processor and a first memory for storing audio processing programs; the audio processor also includes an SPI interface.

[0018] The MCU processor is connected to the audio processor via the SPI interface;

[0019] The first memory is connected to the audio processor via the SPI interface.

[0020] In one embodiment, the audio processing system further includes a second memory for storing system configuration information and a CAN communication module;

[0021] The MCU processor includes an I2C interface, and the second memory is connected to the MCU processor through the I2C interface;

[0022] The CAN communication module is connected to the MCU processor.

[0023] In one embodiment, there are multiple power amplifier modules, each of which is a Class D amplifier with an FS5024E chip. Each power amplifier module is connected to multiple speakers, which are located at different positions in the vehicle.

[0024] In one embodiment, the audio processing system further includes a power management module;

[0025] The power management module includes a filter and switch module, a first DC-DC converter, a second DC-DC converter, a voltage regulator, and a third DC-DC converter. The input power supply is connected to the filter and switch module. The filter and switch module is connected to the first DC-DC converter and the second DC-DC converter. The first DC-DC converter converts the input voltage to a first target voltage. The second DC-DC converter converts the input voltage to a second target voltage. The first DC-DC converter is connected to both the voltage regulator and the third DC-DC converter. The voltage regulator converts the first target voltage to a third target voltage. The third DC-DC converter converts the first target voltage to a fourth target voltage.

[0026] This utility model also provides a vehicle, including an in-vehicle infotainment system, a microphone, and an audio processing system supporting in-vehicle karaoke as described in the above embodiments.

[0027] This invention provides an audio processing system for in-vehicle karaoke, along with a vehicle. The audio processor connects to the in-vehicle infotainment system or smart cockpit domain controller, eliminating the need for the microphone to pass through the infotainment system before connecting to the audio processing system; instead, it connects directly to the audio processor. This structure significantly simplifies the transmission path of the microphone audio signal, effectively reducing audio latency. The audio processor, equipped with voice separation capabilities, processes the second audio signal collected by the microphone and the audio signal output from the in-vehicle infotainment system or smart cockpit domain controller, then drives the speakers to produce sound via a power amplifier module. This reduces reliance on external devices such as the vehicle's infotainment system, lowers system resource consumption, and improves voice separation performance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an existing audio processing system.

[0029] Figure 2 This is a schematic diagram of the structure of an audio processing system in one embodiment.

[0030] Figure 3This is a schematic diagram of the audio processing system in another embodiment.

[0031] Figure 4 This is a schematic diagram of the circuit principle of a wireless receiving module in one embodiment.

[0032] Figure 5 This is a schematic diagram of the structure of an audio processing system in one embodiment. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0036] like Figure 1 The diagram shows the structure of an existing audio system supporting in-car karaoke. In this system, microphone 10 is connected to in-vehicle infotainment system 20, which in turn is connected to audio processing system 30. Audio processing system 30 performs audio processing and amplification. In this design, the microphone signal transmission path is cumbersome. This multi-stage transmission method not only increases the complexity of signal transmission but also leads to high audio latency. Regarding voice separation, it largely relies on software processing on the in-vehicle infotainment system or other external devices. This not only consumes significant system resources but also results in poor separation performance.

[0037] In view of this, this application provides an audio processing system 200 that supports in-vehicle karaoke, such as... Figure 2 As shown, it includes: an audio processor 202 with voice separation function, a power amplifier module 204, and a speaker 206. The specific connection relationship is as follows:

[0038] The audio processor 202 is connected to the in-vehicle infotainment system 104 or the smart cockpit domain controller 106, and is used to receive a first audio signal output by the in-vehicle infotainment system 104 or the smart cockpit domain controller 106. The audio processor 202 is also connected to the microphone 102, and is used to receive a second audio signal collected by the microphone 102, and process the first and second audio signals. The audio processor has a TDM interface, which is connected to the power amplifier module 204, and is used to output the processed audio signal to the power amplifier module 204 for power amplification. The power amplifier module 204 is connected to the speaker 206, and is used to play the power-amplified audio signal through the speaker 206.

[0039] In this embodiment, by setting the microphone 102 to be directly connected to the audio processor 202 of the audio processing system 200, the second audio signal collected by the microphone 102 is directly transmitted to the audio processor 202 of the audio processing system 200 for processing, which greatly simplifies the transmission path of the microphone audio signal and effectively reduces audio latency.

[0040] The in-vehicle infotainment system 104 is part of the in-vehicle terminal, integrating audio, video, navigation, and communication functions. The intelligent cockpit domain controller 106, based on the in-vehicle infotainment system 104, integrates functions such as air conditioning and driver assistance, enhancing the overall level of intelligence. Both the in-vehicle infotainment system 104 and the intelligent cockpit domain controller 106 provide interactive interfaces for easy user operation, command input, and response to user actions, displaying relevant content such as audio and video feeds and navigation maps. In a karaoke scenario, users can input song titles through the interactive interfaces of the intelligent cockpit domain controller 106 or the in-vehicle infotainment system 104, and the lyrics and / or video will be displayed on the interface.

[0041] The in-vehicle infotainment system 104 or the smart cockpit domain controller 106 is connected to the audio processor 202. The user selects a song through the in-vehicle infotainment system 104 or the smart cockpit domain controller 106, and the in-vehicle infotainment system 104 or the smart cockpit domain controller 106 sends the first audio signal of the song selected by the user to the audio processor 202.

[0042] The audio processor 202 features voice separation. In karaoke scenarios, the second audio signal captured by microphone 102 includes not only the user's vocals but also the accompaniment from the speakers. In multi-person singing scenarios, the audio signal captured by each microphone also includes the vocals of singers using other microphones. Through voice separation technology, the singer's actual voice can be separated from the second audio signal, eliminating interference from the accompaniment. It also allows for independent voice separation of signals from different microphones, avoiding mixing interference from different singers' voices.

[0043] The audio processor 202 with human voice separation function can be an automotive-grade DSP (Digital Signal Processor) audio processor, which performs human voice separation on the second audio signal, extracts independent and clean human voice signals, and mixes the human voice signals with the first audio signal.

[0044] In existing technologies, voice separation often relies on software processing on the vehicle's infotainment system or other external devices. This not only consumes significant system resources but also yields unsatisfactory separation results. This embodiment, however, utilizes an audio processor with voice separation capabilities to achieve voice separation. This reduces reliance on external devices such as the vehicle's infotainment system, lowers system resource consumption, and improves voice separation performance.

[0045] The audio processor 202 has a TDM interface, through which it connects to the power amplifier module 204. The power amplifier module 204 may include a DAC conversion circuit and a power amplifier, used to convert the audio signal processed by the audio processor 202 into an analog signal and amplify it. In some embodiments, the power amplifier module 204 may also employ a power amplifier chip, directly processing the analog signal output by the audio processor without the need for complex analog-to-digital / digital-to-analog conversion processes, resulting in extremely low latency that meets the low-latency requirements of in-vehicle karaoke rooms.

[0046] The power amplifier module 204 is connected to the speaker 206. The power amplifier module amplifies the processed audio and drives the speaker 206 to produce sound.

[0047] Using the aforementioned audio processing system, the audio processor connects to the in-vehicle infotainment system or smart cockpit domain controller. The microphone no longer connects to the audio processor directly, bypassing the in-vehicle infotainment system. This structure significantly simplifies the transmission path of the microphone audio signal, effectively reducing audio latency. The audio processor, equipped with voice separation capabilities, processes the second audio signal captured by the microphone and the audio signal output from the in-vehicle infotainment system or smart cockpit domain controller, then drives the speakers through a power amplifier module. This reduces reliance on external devices such as the vehicle's infotainment system, lowers system resource consumption, and improves voice separation performance.

[0048] In one embodiment, such as Figure 3 As shown, microphone 102 is a wireless microphone, and the audio processing system also includes a wireless receiving module 208; the wireless microphone 102 is connected to the audio processor through the wireless receiving module 208.

[0049] In this embodiment, the wireless receiving module 208 can function as a receiver for the wireless microphone 102, and is integrated into the audio processing system. In application scenarios, two wireless microphones can be configured to directly connect to the audio processing system, reducing signal transmission steps. This method of integrating the microphone receiver into the audio processing system effectively improves the system's integration and stability.

[0050] In one embodiment, the wireless receiving module 208 can be a 2.4G wireless receiving module or a Bluetooth receiving module, and the wireless microphone 102 can be a microphone with a communication method corresponding to the wireless communication module.

[0051] In one embodiment, such as Figure 4 As shown, the wireless receiving module is a 2.4G wireless receiving module, which includes a ZG-M100 chip, an antenna, and a matching circuit P1; the antenna is connected to the pins of the ZG-M100 chip through the matching circuit.

[0052] like Figure 4 As shown, antenna J13 is used to capture electromagnetic wave signals in space and is connected to the ANT pin of the ZG-M100 chip through matching circuit P1. Matching circuit P1 includes a first inductor L1, a first capacitor C580, and a second capacitor C581. One end of the first capacitor C580 is connected to one end of the first inductor L1 and the antenna connection port, and the other end of the first capacitor C580 is grounded. One end of the second capacitor C581 is connected to the other end of the first inductor L1 and the ANT pin of the ZG-M100 chip, and the other end of the second capacitor C581 is grounded.

[0053] The matching circuit P1 performs impedance matching on the weak 2.4G wireless signal received by the antenna, enabling the signal to be efficiently transmitted through the ANT pin to the RF receiving circuit inside the ZG-M100 chip, thereby improving the receiving sensitivity.

[0054] like Figure 4 As shown, the wireless receiver module also includes a crystal oscillator circuit P2, which includes a crystal oscillator X5, a third capacitor C583, a fourth capacitor C584, a first resistor R323, and a second resistor R324. The third capacitor C583 is connected to one end of the crystal oscillator X5 and the first end of the first resistor R323 and grounded. The first end of the first resistor R323 is also connected to the 24MOUT pin of the ZG-M100 chip. The fourth capacitor C584 is connected to the other end of the crystal oscillator X5, the first end of the second resistor R324, and the second end of the first resistor R323 and grounded. The second end of the second resistor R324 is connected to the 24MIN pin of the ZG-M100 chip.

[0055] In this embodiment, the 24MOUT pin of the ZG-M100 chip serves as an output pin, providing the internally generated clock signal. The 24MIN pin of the ZG-M100 chip serves as an input pin, receiving the external clock signal. The ZG-M100 chip is connected to an external crystal oscillator X5 via the 24MOUT and 24MIN pins. The crystal oscillator X5 is connected in series with the third capacitor C583 and the fourth capacitor C584 to form a resonant circuit, improving the stability and reliability of the oscillation and providing the basic clock for the chip's internal digital circuit operation and wireless signal processing functions. The first resistor R323 and the second resistor R324 are connected to the ZG-M100 chip to feed back the amplifier's output signal to the crystal oscillator input, forming a negative feedback loop. The negative feedback stabilizes the oscillation amplitude and prevents distortion caused by excessive gain.

[0056] like Figure 4 As shown, the ZG-M100 chip also includes VCC_RF related pins, such as the VCC_RF pin, CDCD_VCC pin, and DCDC_LX pin, to power the wireless receiver module. Through inductor L43 and capacitor C582, power supply interference between circuits is prevented, ensuring the stability of RF signal processing.

[0057] The ZG-M100 chip also includes a VCC_RTC pin, which is grounded via capacitor C585.

[0058] The ZG-M100 chip also includes VCC3V3 related pins (PIN 8 / 9 / 14 / 27 / 28): As shown in the diagram, multiple lines are connected to VCC3V3, which is the main power supply for the chip and some circuits. Capacitors C588 and C589 form a filter circuit to stabilize the VCC3V3 power supply, remove high-frequency and low-frequency noise from the power supply, and ensure stable power supply to the chip.

[0059] The ZG-M100 chip also includes a VCC5V related pin (PIN 7): a filter circuit composed of capacitors C586 and C587 provides 5V power to the M100 chip.

[0060] The ZG-M100 chip also includes GPIO pins, such as PB0 and PD0, which can be used as general-purpose input / output ports for data interaction and control signal transmission between the chip and other external devices (such as sensors, microcontrollers, etc.).

[0061] The ZG-M100 chip also includes UART interfaces, such as M100_UART_TX and M100_UART_RX, which are used for asynchronous serial communication between the chip and external devices, and to receive configuration commands from the main control chip.

[0062] The ZG-M100 chip also includes USB interfaces, such as M100_DP and M100_DM, for USB communication.

[0063] The ZG-M100 chip also includes M100_HPR and M100_HPL pins (pin 32, pin 30) for analog audio signal output.

[0064] The ZG-M100 chip also includes M100_I2S0_D0 / M100_I2S0_LRCLK / M100_I2S0_BCLK for I2S signal output.

[0065] In one embodiment, such as Figure 3 As shown, the audio processing system further includes an A2B bus communication module 210, which includes an A2B master node and at least one A2B slave node.

[0066] The audio processing system also includes a wired microphone 108 and / or a gravity sensor 110.

[0067] The in-vehicle infotainment system 104 is connected to the A2B master node via a cable, and the A2B master node is connected to the audio processor via a TDM interface.

[0068] A wired microphone 108 and / or a gravity sensor 110 are connected to the A2B slave node via a cable, and the A2B slave node is connected to the audio processor via the TDM interface.

[0069] The A2B bus communication module has advantages such as simplified wiring, high bandwidth, and low latency. It typically includes one master node and multiple slave nodes. As the core of the in-vehicle interactive system, the in-vehicle infotainment system is responsible for encapsulating audio data into A2B protocol frames. These frames are connected to the master node via cables, and the encapsulated audio data is sent to the master node, which then transmits it to the audio processor 202.

[0070] The audio processor uses a DSP chip as its core processing unit and has SPI1, SPI2 and TDM interfaces. The master node is connected to the audio processor 202 through the TDM interface, which enables high-speed transmission of audio data.

[0071] In this embodiment, the audio processing system communicates with other in-vehicle devices (such as IVI or CDC) via the A2B bus communication module, and can also connect to a microphone or gravity sensor to ensure smooth transmission of audio and related data.

[0072] In one embodiment, such as Figure 3 As shown, the audio processing system also includes an MCU processor 212 and a first memory 214 for storing audio processing programs; the audio processor also includes an SPI interface.

[0073] The MCU processor 212 is connected to the audio processor 202 via the SPI interface; the first memory 214 is connected to the audio processor 202 via the SPI interface.

[0074] The audio processing system also includes a second memory 216 for storing system configuration information and a CAN communication module.

[0075] The MCU processor includes an I2C interface, and the second memory 216 is connected to the MCU processor through the I2C interface.

[0076] The first memory can be a flash memory to store audio processing programs, and the second memory can be an EEPROM to store system configuration information, thus ensuring the stability and configurability of the system operation.

[0077] In one embodiment, the CAN communication module 208 is connected to the MCU processor 212 and can be used to access various control units in automotive electronic systems (such as engine control units, brake control units, etc.), distributed nodes in industrial automation equipment (such as sensors, actuators, etc.), or CAN bus network nodes in smart IoT devices to achieve efficient and reliable data transmission and communication control.

[0078] In other embodiments, the audio processing system may also include other types of communication buses, such as the FlexRay bus.

[0079] In this application, the audio processing system covers communication methods such as CAN bus and A2B bus, and the audio processor and MCU processor support multiple interface access methods, which can meet the access needs of different types of devices.

[0080] In one embodiment, such as Figure 5 As shown, there are multiple power amplifier modules 204, each a Class D amplifier using an FS5024E chip. Each power amplifier module is connected to multiple speakers located at different positions within the vehicle. Therefore, each power amplifier module 204 can drive speakers located in different positions, achieving power amplification of the audio signal output and providing users with clear and loud sound.

[0081] In one embodiment, such as Figure 5 As shown, the audio processing system also includes a power management module 218, which includes a filter and switch module, a first DC-DC converter, a second DC-DC converter, a voltage regulator, and a third DC-DC converter. The input power supply is connected to the filter and switch module. The filter and switch module is connected to the first DC-DC converter and the second DC-DC converter. The first DC-DC converter converts the input voltage to a first target voltage. The second DC-DC converter in the filter and switch module converts the input voltage to a second target voltage. The first DC-DC converter is connected to the voltage regulator and the third DC-DC converter. The voltage regulator converts the first target voltage to a third target voltage. The third DC-DC converter converts the first target voltage to a fourth target voltage.

[0082] For example, the input power supply output voltage of 12V after passing through the filter and switching module is converted to 5V by the first DC-DC converter, to 8V by the second DC-DC converter, to 3V by the voltage regulator, and to 1V by the third DC-DC converter to meet the input voltage requirements of different devices in the audio processing system. For example, the power management module 218 can provide an 8V input voltage to the A2B bus communication module, a 5V input voltage to the 2.4G wireless receiver module and the CAN communication module, and a 12V input voltage to the power amplifier module.

[0083] In this application, the power management module accurately converts the input battery voltage (9V-16V) into different voltages required by various modules of the system (such as 12V, 5V, 3V3, 1V, 8V, etc.) and outputs a variety of stable voltages to provide power support for the stable operation of the system.

[0084] like Figure 5As shown, the audio processing system supporting in-car karaoke includes:

[0085] The power management module has an input range of 9V-16V battery voltage (Vbat 12V). It first undergoes preliminary processing by a filter and switching module, and then outputs various stable voltages through multiple DC-DC converters (such as SCT2434 and SCT2130) and voltage regulator modules to power other modules in the system and ensure the normal operation of each module.

[0086] The communication module, which includes CAN bus (CAN T / R, CAN_Tx / Rx) and A2B bus (A2B1Slave, A2B2Master), enables data communication with other in-vehicle devices (such as IVI or CDC), and can also connect to a microphone or gravity sensor to ensure smooth transmission of audio and related data.

[0087] The audio processor uses a DSP chip as its core processing unit and communicates with other modules via SPI1 and SPI2 interfaces to perform audio processing tasks such as vocal separation in karaoke modes. It utilizes a TDM interface to achieve high-speed transmission of audio data.

[0088] The storage module, which includes EEPROM and Flash, is used to store critical data such as system configuration information and audio processing programs, ensuring the stability and configurability of the system.

[0089] The power amplifier module is equipped with four Class D 25W@4Ω FS5024E power amplifier modules, which drive multiple speakers to amplify and output audio signals, providing users with clear and loud sound.

[0090] It can be configured with two karaoke microphones, which can be directly connected to the audio processing system, reducing signal transmission links. Furthermore, the microphone receivers are built-in, effectively improving the system's integration and stability.

[0091] The power management module provides a stable power supply to all modules of the system. The communication module acts as a bridge for data transmission, accurately transmitting data from IVI or CDC and devices such as microphones to the audio processing module. The audio processing processor performs fine processing on the input audio signal and then transmits the processed signal to the power amplifier module through the TDM interface. The power amplifier module outputs the amplified audio signal to the speaker to achieve sound playback.

[0092] The audio processing system for in-vehicle karaoke in this application solves the problems of existing technologies, such as reliance on imports, high cost, large audio latency, poor vocal separation, and insufficient system stability. The beneficial technical effects are as follows:

[0093] 1. Significantly reduce system costs and enhance product market competitiveness.

[0094] 2. Simplify the signal transmission path, significantly reduce audio latency, achieve synchronization between sound and picture, and significantly improve the in-car karaoke experience.

[0095] 3. Optimize the voice separation function to reduce system resource consumption, ensure the normal operation of other functions of the vehicle system, and improve audio processing quality.

[0096] 4. Improve system integration and stability, and enhance product reliability and user satisfaction.

[0097] This application also provides a vehicle including an in-vehicle infotainment system, a microphone, and an audio processing system supporting in-vehicle karaoke according to any embodiment of this application. The vehicle provided in this application and the in-vehicle audio processing system supporting in-vehicle karaoke provided in this application can achieve the same technical effects, and will not be described further here.

[0098] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An audio processing system supporting in-vehicle karaoke, characterized in that, The audio processing system includes: an audio processor with voice separation function, a power amplifier module, and a speaker; The audio processor is connected to the in-vehicle infotainment system or the smart cockpit domain controller and is used to receive the first audio signal output by the in-vehicle infotainment system or the smart cockpit domain controller; The audio processor is also connected to a microphone to receive a second audio signal collected by the microphone and to process the first and second audio signals. The audio processor has a TDM interface, which is connected to the power amplifier module to output the processed audio signal to the power amplifier module for power amplification. The power amplifier module is connected to the speaker and is used to play the amplified audio signal through the speaker.

2. The audio processing system supporting in-vehicle karaoke according to claim 1, characterized in that, The microphone is a wireless microphone, and the audio processing system further includes a wireless receiving module; the wireless microphone is connected to the audio processor through the wireless receiving module.

3. The audio processing system supporting in-vehicle karaoke according to claim 2, characterized in that, The wireless receiving module is a 2.4G wireless receiving module, which includes a ZG-M100 chip, an antenna, and a matching circuit. The antenna is connected to the pin of the ZG-M100 chip through the matching circuit. The matching circuit includes a first inductor, a first capacitor, and a second capacitor. One end of the first capacitor is connected to one end of the first inductor and the antenna connection port, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the other end of the first inductor and the ANT pin of the ZG-M100 chip, and the other end of the second capacitor is grounded.

4. The audio processing system supporting in-vehicle karaoke according to claim 3, characterized in that, The wireless receiving module further includes a crystal oscillator circuit, which includes a crystal oscillator, a third capacitor, a fourth capacitor, a first resistor, and a second resistor. The third capacitor is connected to one end of the crystal oscillator and the first end of the first resistor and grounded. The first end of the first resistor is also connected to the output pin of the ZG-M100 chip. The fourth capacitor is connected to the other end of the crystal oscillator, the first end of the second resistor, and the second end of the first resistor and grounded. The second end of the second resistor is connected to the input pin of the ZG-M100 chip.

5. The audio processing system supporting in-vehicle karaoke according to claim 1, characterized in that, The audio processing system also includes: an A2B bus communication module, a wired microphone, and / or a gravity sensor; The A2B bus communication module includes an A2B master node and at least one A2B slave node; The in-vehicle infotainment system is connected to the A2B master node via a cable, and the A2B master node is connected to the audio processor via a TDM interface; The wired microphone and / or gravity sensor are connected to the A2B slave node via a cable, and the A2B slave node is connected to the audio processor via the TDM interface.

6. The audio processing system supporting in-vehicle karaoke according to claim 1, characterized in that, The audio processing system also includes an MCU processor and a first memory for storing audio processing programs; the audio processor also includes an SPI interface. The MCU processor is connected to the audio processor via the SPI interface; The first memory is connected to the audio processor via the SPI interface.

7. The audio processing system for supporting in-vehicle karaoke according to claim 6, characterized in that, The audio processing system also includes a second memory for storing system configuration information and a CAN communication module; The MCU processor includes an I2C interface, and the second memory is connected to the MCU processor through the I2C interface; The CAN communication module is connected to the MCU processor.

8. The audio processing system supporting in-vehicle karaoke according to claim 1, characterized in that, There are multiple power amplifier modules, each of which is a Class D amplifier with an FS5024E chip. Each power amplifier module is connected to multiple speakers, which are located at different positions in the vehicle.

9. The audio processing system for supporting in-vehicle karaoke according to any one of claims 1 to 8, characterized in that, The audio processing system also includes a power management module; The power management module includes a filter and switch module, a first DC-DC converter, a second DC-DC converter, a voltage regulator, and a third DC-DC converter. The input power supply is connected to the filter and switch module. The filter and switch module is connected to the first DC-DC converter and the second DC-DC converter. The first DC-DC converter converts the input voltage to a first target voltage. The second DC-DC converter converts the input voltage to a second target voltage. The first DC-DC converter is connected to the voltage regulator and the third DC-DC converter. The voltage regulator converts the first target voltage to a third target voltage. The third DC-DC converter converts the first target voltage to a fourth target voltage.

10. A vehicle, characterized in that, It includes an in-vehicle infotainment system, a microphone, and an audio processing system for supporting in-vehicle karaoke as described in any one of claims 1 to 9.

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