Audio processing system

Abstract

The invention relates to the technical field of audio processing, in particular to an audio processing system, which is characterized in that a USB-dongle main body module is used for realizing power supply management, main control scheduling and data storage, and overall planning the operation of the whole system; the microphone signal receiving module is used for wirelessly capturing microphone audios and preprocessing the microphone audios for signal processing; the external playing equipment interface module is used for establishing connection with external equipment and processing audio transmission and control instructions; the audio signal optimization module is used for performing noise reduction, AI human voice elimination and sound mixing fusion processing on the audio; the wireless transmitting and audio output module is used for converting the optimized audio into a Bluetooth signal and supporting synchronous receiving of multiple devices; the user parameter adjusting module adjusts system function parameters in real time through multiple ways of keys / HID / APP; the low-delay wireless transmission chip and the AI voice eliminating module are integrated through the USB-dongle body module, so that the problem of high voice delay of a microphone in a traditional scheme is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of audio processing, in particular to an audio processing system. BACKGROUND

[0002] In the field of audio processing, the sound transmission of wireless microphones in the prior art usually needs to go through multiple transmission links. Specifically, the sound of the microphone is first transmitted wirelessly to the USB dongle, then the USB dongle is transmitted to the receiving device such as a TV, computer, etc. through USB Audio, and finally the sound is transmitted to the playback device such as a sound box by the receiving device. This multi-stage transmission method causes significant delay in the transmission process of the sound signal. SUMMARY

[0003] To solve the above problems, an audio processing system is provided, which integrates a low-delay wireless transmission chip and an AI de-voice module in the USB-dongle body module to solve the problem of high microphone sound delay in the traditional solution.

[0004] To solve the problems of the prior art, the present application provides an audio processing system, which includes a USB-dongle main module, a microphone signal receiving module, an external playback device interface module, an audio signal optimization module, a wireless transmission and audio output module, and a user parameter adjustment module.

[0005] The USB-dongle main module is used to realize power management, main control scheduling and data storage, and to overall plan the system operation.

[0006] The microphone signal receiving module is used to wirelessly capture microphone audio and pre-process signal processing.

[0007] The external playback device interface module is used to establish a connection with the external device, process audio transmission and control instructions.

[0008] The audio signal optimization module is used to perform noise reduction, AI de-voice and mixing fusion processing on the audio.

[0009] The wireless transmission and audio output module is used to convert the optimized audio into a Bluetooth signal and support multiple device synchronous reception.

[0010] The user parameter adjustment module adjusts the system function parameters in real time through multiple ways such as keys, HID and APP.

[0011] External audio is input through the external playback device interface module and the microphone signal is input through the microphone signal receiving module, and after being processed by the audio signal optimization module, it is output through the wireless transmission and audio output module; the USB-dongle main module coordinates the timing of each unit, and the user parameter adjustment module dynamically configures the processing strategy to form a complete function chain of "input-optimization-output-control".

[0012] As a specific embodiment of the application, the USB-dongle main module includes:

[0013] The power management unit is used to realize voltage conversion and noise suppression;

[0014] The storage unit is used to coordinate the collection, processing and transmission of audio signals;

[0015] The main control unit is used to store system firmware, algorithm parameters and user configuration.

[0016] As a specific embodiment of the application, the microphone signal receiving module includes:

[0017] The wireless receiving unit is used to capture the wireless microphone radio frequency signal, convert the radio frequency signal into a digital audio signal through the built-in demodulation circuit, and realize the conversion from the high frequency carrier to the baseband signal;

[0018] The signal conditioning unit is used to filter and gain adjust the demodulated digital audio signal, and output the I / Q data with optimized signal-to-noise ratio to the main control unit;

[0019] The state indication unit feedbacks the working conditions of each module through the LED light state.

[0020] As a specific embodiment of the application, the external playback device interface module includes:

[0021] The USB physical interface unit is used to realize physical connection with the external device;

[0022] The USB Audio protocol processing unit receives the decoded digital audio output from the external device and processes it.

[0023] As a specific embodiment of the application, the wireless transmission and audio output module includes:

[0024] The differential signal conversion unit is used to convert the differential audio signal output by the main control unit into a single-ended signal, suppress high-frequency noise through low-pass filtering, and provide pure analog audio input for the wireless transmission unit;

[0025] The wireless transmission unit is used to modulate the single-ended audio signal into a radio frequency signal and send it to the audio playback device.

[0026] As a specific embodiment of the present application, the user parameter adjustment module comprises:

[0027] A microphone button control unit for quick control of volume and reverb level and wireless transmission of hardware button instructions;

[0028] The HID control protocol unit implements device identification, parameter adjustment and mode switching through the HID protocol;

[0029] The APP interaction unit provides a fine parameter adjustment interface.

[0030] As a specific embodiment of the present application, the signal conditioning unit comprises:

[0031] The AI de-voice sub-unit runs a human voice separation algorithm to suppress the human voice component in the audio stream,

[0032] The USB Audio signal processing sub-unit performs amplitude limiting processing and preset EQ adjustment on the input audio;

[0033] The mixing sub-unit weights and mixes the accompaniment signal after AI de-voice and the microphone processing signal, controls the output level through dynamic range compression, and avoids signal clipping distortion.

[0034] The present application has the following beneficial effects compared with the prior art:

[0035] 1. Significantly reduces audio transmission delay

[0036] The present application optimizes the internal hardware architecture of the USB-dongle, adopts a low-delay wireless transmission chip solution, and reduces the signal transfer link in the traditional multi-stage transmission. The wireless microphone signal can be directly transmitted to the processing core through a dedicated link, avoiding the delay accumulation caused by multiple conversions through the USB Audio protocol in the traditional scheme. This improvement enables the audio and video to remain synchronized in real-time interactive scenarios, and users can obtain natural sound feedback in karaoke, live streaming and other scenarios, eliminating the auditory disconnection caused by delay.

[0037] 2. Achieve high-quality audio processing effect

[0038] The AI de-voice module integrated in the system can accurately separate the human voice component in the external audio, preserving the integrity of the accompaniment music. At the same time, the microphone signal processing module is optimized through dynamic noise reduction, reverb adjustment and other algorithms, effectively suppressing environmental noise and enhancing the expressiveness of human voice. The mixing link adopts intelligent proportional fusion technology, allowing the microphone signal and the processed accompaniment to be naturally superimposed, presenting a clear sound field effect, meeting the user's demand for professional-level audio quality.

[0039] 3. Improve system compatibility and flexibility

[0040] The external playback device interface module supports connection to various terminal devices, achieving plug-and-play functionality via a standardized USB protocol, requiring no additional driver configuration. The user control module offers multiple adjustment methods; parameters can be adjusted in real-time via physical buttons, external devices, and a mobile app, adapting to different operating habits in various usage scenarios. The system supports simultaneous audio signal reception from multiple devices, meeting the needs of multi-user sharing scenarios and expanding the product's application scope. Attached Figure Description

[0041] Figure 1 This is an architecture connection diagram of an audio processing system according to the present invention.

[0042] Figure 2 This is an internal architecture diagram of the USB-dongle main module in an audio processing system of the present invention.

[0043] Figure 3 This is a circuit diagram of a power management unit and a USB physical interface unit in an audio processing system according to the present invention.

[0044] Figure 4 This is a circuit diagram of a microphone signal receiving module in an audio processing system according to the present invention.

[0045] Figure 5 This is a circuit diagram of the main control unit in an audio processing system according to the present invention.

[0046] Figure 6 This is a circuit diagram of the AI ​​voice removal subunit in an audio processing system of the present invention.

[0047] Figure 7 This is a circuit diagram of a differential signal conversion unit in an audio processing system according to the present invention.

[0048] Figure 8 This is a circuit diagram of a wireless transmitting unit in an audio processing system according to the present invention. Detailed Implementation

[0049] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0050] An audio processing system includes a USB dongle main module, a microphone signal receiving module, an external playback device interface module, an audio signal optimization module, a wireless transmission and audio output module, and a user parameter adjustment module.

[0051] The USB-dongle main module is used to implement power management, main control scheduling, and data storage, and to coordinate the operation of the entire system.

[0052] The microphone signal receiving module is used to wirelessly capture microphone audio and perform signal processing.

[0053] The external playback device interface module is used to establish a connection with external devices and process audio transmission and control commands.

[0054] The audio signal optimization module is used to perform noise reduction, AI voice removal, and audio mixing and fusion processing on audio.

[0055] The wireless transmitter and audio output module is used to convert optimized audio into Bluetooth signals, supporting simultaneous reception by multiple devices.

[0056] The user parameter adjustment module allows for real-time adjustment of system function parameters via multiple methods, including buttons, HID, and the app.

[0057] External audio is input via the external playback device interface module, and microphone signals are input via the microphone signal receiving module. After being processed by the audio signal optimization module, the audio is output via the wireless transmission and audio output module. The USB-dongle main module coordinates the timing of each unit, and the user parameter adjustment module dynamically configures the processing strategy, forming a complete functional chain of "input-optimization-output-control".

[0058] Furthermore, the main USB-dongle module includes: a power management unit for voltage conversion and noise suppression; a storage unit for coordinating audio signal acquisition, processing, and transmission; and a main control unit for storing system firmware, algorithm parameters, and user configurations.

[0059] Furthermore, the microphone signal receiving module includes: a wireless receiving unit, used to capture the radio frequency signal of the wireless microphone, and convert the radio frequency signal into a digital audio signal through a built-in demodulation circuit, realizing the conversion from high-frequency carrier to baseband signal; a signal conditioning unit, used to filter and adjust the gain of the demodulated digital audio signal, and output I / Q data with optimized signal-to-noise ratio to the main control unit; and a status indicator unit, which provides feedback on the working status of each module through LED lights.

[0060] Furthermore, the external playback device interface module includes: a USB physical interface unit for physical connection with external devices; and a USB Audio protocol processing unit for receiving audio streams from external devices, decoding them, outputting digital audio, and processing it.

[0061] Furthermore, the wireless transmission and audio output module includes: a differential signal conversion unit, used to convert the differential audio signal output by the main control unit into a single-ended signal, suppressing high-frequency noise through low-pass filtering, and providing a clean analog audio input for the wireless transmission unit; and a wireless transmission unit, used to modulate the single-ended audio signal into a radio frequency signal and send it to the audio playback device.

[0062] Furthermore, the user parameter adjustment module includes: a microphone button control unit for quick control of volume and reverb level and wireless transmission of hardware button commands; an HID control protocol unit for device identification, parameter adjustment and mode switching via the HID protocol; and an APP interaction unit for providing a refined parameter adjustment interface.

[0063] Furthermore, the signal conditioning unit includes: an AI vocal removal subunit that runs a vocal separation algorithm to suppress vocal components in the audio stream; a USB Audio signal processing subunit that performs amplitude limiting and preset EQ adjustment on the input audio; and a mixing subunit that weights and mixes the AI-removed accompaniment signal with the microphone processing signal, and controls the output level through dynamic range compression to avoid signal clipping distortion.

[0064] Reference Figure 1 As shown in the diagram, the device includes a wireless microphone, USB dongle, external player, multiple headphones, and receiver.

[0065] Transmission method:

[0066] 1. Connect external playback devices (TV, mobile phone, computer, etc.) via USB, Type-C, etc. The external playback devices transmit audio signals to the USB dongle module via USB Audio.

[0067] 2. The wireless microphone transmits the microphone signal wirelessly to the USB dongle module.

[0068] 3. The USB dongle module processes and mixes the two signals mentioned above, and then transmits them wirelessly to the headphones and speakers.

[0069] 4. The USB dongle module contains a microphone signal receiving module, which performs reverb, echo, noise reduction, EQ adjustment, and limiting on the microphone audio.

[0070] 5. The USB dongle module contains a USB Audio protocol processing unit and an AI vocal removal subunit, which performs AI vocal removal, EQ adjustment, and amplitude limiting on the audio from playback devices such as TVs, computers, and mobile phones.

[0071] Control method:

[0072] The wireless microphone's button can wirelessly transmit commands to the USB dongle module to control the USB dongle module's output volume, AI voice cancellation level, EQ mode, reverb and echo levels, etc.

[0073] The USB dongle module uses the HID protocol to enable various controls with players (TVs, set-top boxes, computers, mobile phones, etc.), such as device identification, volume control, and mobile apps that can be installed to control sound effects and other functions.

[0074] core:

[0075] Audio 1: The wireless microphone transmits audio to the USB dongle module, where it undergoes reverb processing via the internal DSP.

[0076] Audio 2: The audio transmitted from the external player device to the USB dongle module is processed by the internal DSP using AI to remove human voices.

[0077] The two audio tracks are mixed in the DSP and then wirelessly transmitted to multiple headphones, speakers, and players.

[0078] Reference Figure 2 The internal architecture of the USB dongle body module is shown.

[0079] Signal flow:

[0080] 1. External playback devices connect to the USB dongle module via USB, transmitting USB audio signals to the U1 main control DSP module (main control unit). U1 then transmits the signals to U7 (AI vocal removal sub-unit), which processes the signals by removing vocals before sending them back to U1.

[0081] 2. The wireless microphone connects wirelessly to the internal wireless receiver module U2 of the USB dongle main unit. U2 processes the signal and transmits it to the main control DSP U1.

[0082] 3. The main control DSP U1 mixes the processed music signal and microphone signal together and transmits them to the U12 module via differential transmission.

[0083] 4. U12 converts the differential signal into a single-ended signal and transmits it to the U10 wireless transmission module.

[0084] 5. The U10 transmits the signal via wireless Bluetooth broadcast mode.

[0085] 6. U1 can also transmit digital audio signals from U10's IIS IN via IIS OUT. This allows U12 to be used for monitoring and amplification.

[0086] Reference Figure 3The circuit diagram shown illustrates the power management unit and USB physical interface unit. Pin 1 of USB2 is connected to pins 1 and 3 of U6 via ferrite bead L3. Pins 2 and 3 are connected to pins 10 and 11 of the main controller U1 via resistors R99 and R98 for USB AUDIO signal and HID protocol transmission. Pin 5 of U6 outputs 3.3V, which is connected to pin 7 of U2 via resistor R8, to pin 31 of U1 via resistor L5, to pin 31 of U7 via resistor L11, to pin 8 of U10 via resistor R25, and to pin 5 of U12 via resistor R91, providing power to each of these pins.

[0087] Reference Figure 4 The circuit diagram of the microphone signal receiving module shown is as follows: pins 2, 3, and 4 of U2 are connected to pins 23, 24, and 15 of U1 to transmit the received microphone signal to U1. Pin 15 is connected to pin 2 of antenna ANT2 via C2. Pins 17 and 18 are connected to pins 1 and 3 of external crystal oscillator Y5. Pins 21 and 22 are connected to LED1 and LED2.

[0088] Reference Figure 5 The circuit diagram of the main control unit shown is as follows: Pins 7 and 8 of U1 are connected to pins 2 and 3 of U7 for IIC communication. Pins 2 and 3 are connected to pins 11 and 12 of U2 through resistors R5 and R6, and to pins 21 and 22 of U10 through resistors R20 and R21, respectively, for serial communication. Pins 13, 4, 5, and 6 are connected to pins 13, 4, 5, and 6 of U7 for signal processing and feedback. Pins 15, 24, and 14 are connected to pins 13, 14, and 15 of U10 through resistors R27, R28, and R2 to transmit digital signals to U10. Pins 38 and 39 are connected to pins 3 and 1 of the external crystal oscillator Y1. Pins 19, 21, 21, and 22 are connected to C43, C42, C48, and C49 to input analog signals to U12.

[0089] Reference Figure 6 The circuit diagram of the AI ​​voice cancellation subunit shown is shown. Pins 38 and 39 of U7 are connected to pins 1 and 3 of the external crystal oscillator Y4.

[0090] Reference Figure 7 The circuit diagram of the differential signal conversion unit shown is shown. Pins 3 and 12 of U12 are connected to C127 and C128, and then connected to pins 3 and 4 of U10 through R65 C71 and R66 C70 to transmit the signal to U10.

[0091] Reference Figure 8 The circuit diagram of the wireless transmitter unit shown is provided. Pins 17 and 18 of U10 are connected to pins 2 and 1 of the external crystal oscillator Y2. Pin 16 is connected to antenna ANT1 via C115.

[0092] The above embodiments only illustrate one or more implementations of the invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the invention, and these all fall within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the appended claims.

Claims

1. An audio processing system, characterized by The USB-dongle main module, the microphone signal receiving module, the external playback device interface module, the audio signal optimization module, the wireless transmission and audio output module, and the user parameter adjustment module are connected in series. The USB-dongle main module is used for power management, main control scheduling and data storage, and overall planning of the whole system operation. The microphone signal receiving module is used for wireless capture of microphone audio and preprocessing for signal processing. The external playback device interface module is used for establishing a connection with an external device, processing audio transmission and control instructions. The audio signal optimization module is used for noise reduction, AI voice removal and audio mixing fusion processing of audio. The wireless transmission and audio output module is used for converting the optimized audio into a Bluetooth signal and supporting multi-device synchronous reception. The user parameter adjustment module adjusts system function parameters in real time through multiple ways such as keys, HID and APP. External audio is input through the external playback device interface module, and microphone signal is input through the microphone signal receiving module. After processing by the audio signal optimization module, the output is obtained through the wireless transmission and audio output module. The USB-dongle main module coordinates the timing of each unit, and the user parameter adjustment module dynamically configures the processing strategy to form a complete function chain of "input-optimization-output-control".

2. The audio processing system of claim 1, wherein the USB-dongle main module comprises: a power management unit for voltage conversion and noise suppression; a storage unit for coordinating audio signal collection, processing and transmission; a main control unit for storing system firmware, algorithm parameters and user configuration.

3. The audio processing system of claim 2, wherein the microphone signal receiving module comprises: a wireless receiving unit for capturing wireless microphone radio frequency signals, converting the radio frequency signals into digital audio signals through a built-in demodulation circuit, and realizing conversion from high frequency carrier to baseband signal; a signal conditioning unit for filtering and gain adjustment of the demodulated digital audio signal, and outputting I / Q data with optimized signal-to-noise ratio to the main control unit; a state indication unit for feedback of the working conditions of each module through LED light state.

4. The audio processing system of claim 3, wherein the external playback device interface module comprises: a USB physical interface unit for physical connection with an external device; a USB Audio protocol processing unit for receiving and processing digital audio after decoding of the audio stream of the external device.

5. The audio processing system of claim 1, wherein the wireless transmission and audio output module comprises: a differential signal conversion unit for converting differential audio signals output by the main control unit into single-ended signals, suppressing high-frequency noise through low-pass filtering, and providing pure analog audio input for the wireless transmission unit; a wireless transmission unit for modulating single-ended audio signals into radio frequency signals and sending them to an audio playback device.

6. The audio processing system of claim 5, wherein the user parameter adjustment module comprises: ​ ​ ​ ​ ​ Microphone button control unit, for volume and reverb level fast control and wireless transmission of hardware button instructions; HID control protocol unit, for device identification, parameter adjustment and mode switching through HID protocol; APP interaction unit, for providing fine parameter adjustment interface.

7. The audio processing system of claim 3, wherein, The signal conditioning unit includes: AI de-voice sub-unit, for running a human voice separation algorithm to suppress human voice components in the audio stream, USB Audio signal processing sub-unit, for performing amplitude limiting processing and preset EQ adjustment on the input audio; Mixing sub-unit, for weighting and mixing the accompaniment signal after AI de-voice and the microphone processing signal, controlling the output level through dynamic range compression to avoid signal clipping distortion.

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