Environmental sound noise reduction system

Abstract

The utility model discloses an environmental sound noise reduction system, which comprises a multi-core processor, a power management module, a Bluetooth audio system-level chip, an audio power amplifier chip, a digital audio processor, a loudspeaker, an echo cancellation module, a key module, a storage module, a USB (Universal Serial Bus) interface and a frequency band interference eliminator, wherein the multi-core processor is connected with the power management module, the Bluetooth audio system-on-chip, the audio power amplifier chip, the digital audio processor, the loudspeaker, the echo cancellation module, the key module, the storage module, the USB interface and the frequency band interference eliminator, and the audio power amplifier chip is connected with the Bluetooth audio system-on-chip, the echo cancellation module and the loudspeaker. And the echo cancellation module is connected with the frequency band interference canceller and the audio processor. According to the utility model, a user can carry out clear player conversation without wearing an earphone, and can enjoy all-dimensional 3D sound effect and clear conversation without the earphone in an open environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit technical field especially relates to an environmental sound noise reduction system. BACKGROUND

[0002] With the improvement of people's living standards, people also pay more attention to the rich spiritual world, so various entertainment methods appear in people's daily life. Among various entertainment methods, games occupy a large proportion, through games not only can release work pressure, and can enrich the spiritual world, therefore, the game industry develops rapidly. In the process of people's pursuit of immersive game experience, game sound effect and player call are very important. But the current game sound product has the problem of poor environmental noise reduction effect, so that users cannot clearly call between players when playing experience, if you want to achieve clear communication between users, you need to wear earphones for a long time, not only will seriously reduce the user's game experience, but also will damage the user's hearing, therefore, how to develop a better environmental sound noise reduction system is a technical problem that enterprises have been researching. SUMMARY

[0003] The utility model discloses a kind of environmental sound noise reduction systems, without earphone can make user can clearly player call, in open environment, earphone can also enjoy all-round 3D sound effect and clearly call.

[0004] To solve the above technical problems, the utility model provides an environmental sound noise reduction system, the environmental sound noise reduction system includes: multi-core processor, power management module, bluetooth audio system level chip, audio power amplifier chip, digital audio processor, loudspeaker, echo cancellation module, key module, storage module, universal serial bus USB interface and band interference canceller, wherein:

[0005] The multi-core processor is connected with the power management module, bluetooth audio system level chip, audio power amplifier chip, digital audio processor, loudspeaker, echo cancellation module, key module, storage module, USB interface and band interference canceller respectively, the audio power amplifier chip is connected with the bluetooth audio system level chip, echo cancellation module and loudspeaker respectively, the echo cancellation module is connected with the band interference canceller and audio processor respectively.

[0006] Optionally, the multi-core processor includes XVF3100 multi-core microcontroller and OTP6266 controller.

[0007] Optionally, the XVF3100 multi-core microcontroller is internally provided with a plurality of XCORE chips, programmable logic control circuits, buffer registers and phase-locked loop feedback circuits, and each XCORE chip is connected based on an XCORE connection switch.

[0008] Optionally, the OTP6266 controller is internally provided with a RISC-V processor core and a cache register.

[0009] Optionally, the Bluetooth audio system-level chip adopts an ATS2853 Bluetooth audio system-level chip, and the ATS2853 Bluetooth audio system-level chip is connected with an audio power amplifier chip through a serial communication bus interface.

[0010] Optionally, the audio power amplifier chip adopts an ACM8625M dual-channel audio power amplifier chip.

[0011] Optionally, the ACM8625M dual-channel audio power amplifier chip is connected with a sampling circuit, and the sampling circuit collects signals from a power amplifier bridge load output port of the ACM8625M dual-channel audio power amplifier chip for filtering and level conversion.

[0012] Optionally, the echo cancellation module comprises a filtering circuit and a level conversion circuit.

[0013] Optionally, the filtering circuit comprises a first TLV9062 differential operational amplifier and a second TLV9062 differential operational amplifier, and a pin 66 of the first TLV9062 differential operational amplifier is connected with a pin 11 of the second TLV9062 differential operational amplifier.

[0014] Optionally, the power management module comprises an AC-DC adapter and a linear voltage stabilizer.

[0015] The utility model provides a kind of ambient noise reduction system, can improve data processing performance by XVF3100 multi-core microcontroller and OTP6266 controller, effectively promote the processing efficiency of ambient noise reduction process. By the cooperation of Bluetooth audio system-level chip and echo cancellation module, ambient noise can be better eliminated, the ACM8625M dual-channel audio power amplifier chip connection sampling circuit is used, sampling circuit collects signals from the power amplifier bridge load output port of ACM8625M dual-channel audio power amplifier chip for filtering and level conversion, echo cancellation module includes filtering circuit and level conversion circuit, can effectively filter high-frequency noise, avoid being influenced by near-end loudspeaker. Without wearing earphone, user can carry out clear player communication, earphone is also avoided in open environment, and omnidirectional 3D sound effect and clear communication can be enjoyed. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structural composition of the environmental sound noise reduction system in this embodiment of the utility model;

[0018] Figure 2 This is a circuit structure diagram of the filter circuit in the echo cancellation module of this utility model embodiment. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] The environmental noise reduction system provided in this embodiment of the utility model, such as Figure 1 As shown, Figure 1 A schematic diagram of the structural composition of an ambient sound noise reduction system according to an embodiment of the present invention is shown. The ambient sound noise reduction system includes: a multi-core processor, a power management module, a Bluetooth audio system-on-a-chip, an audio amplifier chip, a digital audio processor, a speaker, an echo cancellation module, a button module, a storage module, a Universal Serial Bus (USB) interface, and a frequency band interference canceller. The multi-core processor is connected to the power management module, the Bluetooth audio system-on-a-chip, the audio amplifier chip, the digital audio processor, the speaker, the echo cancellation module, the button module, the storage module, the USB interface, and the frequency band interference canceller. The audio amplifier chip is connected to the Bluetooth audio system-on-a-chip, the echo cancellation module, and the speaker. The echo cancellation module is connected to the frequency band interference canceller and the audio processor.

[0021] In the embodiment process of the utility model, the multi-core processor plays a whole control role on the environmental sound noise reduction system, the power management module is used for distributing power to different component modules of the environmental sound noise reduction system, the Bluetooth audio system level chip is used for providing Bluetooth audio function, the audio power amplifier chip is used for adjusting the power of output audio, the digital audio processor is used for processing audio, the loudspeaker is used for playing audio after noise reduction processing, the echo cancellation module is used for eliminating echo noise existing in audio, the key module is used for providing key function for the environmental sound noise reduction system, the storage module is used for storing the program and data of the environmental sound noise reduction system, the universal serial bus (Universal Serial Bus, USB) interface is used for connecting with external equipment, and the frequency band interference eliminator is used for eliminating point noise source.

[0022] In the embodiment process of the utility model, the multi-core processor includes XVF3100 multi-core microcontroller and OTP6266 controller.

[0023] The XVF3100 multi-core microcontroller is built-in with several XCORE chips, programmable logic control circuit, buffer register and phase-locked loop feedback circuit, and each XCORE chip is connected based on XCORE connection switch.

[0024] The OTP6266 controller is built-in with RISC-V processor core and cache.

[0025] Specifically, the XVF3100 multi-core microcontroller is a multi-core parallel architecture microcontroller suitable for high-performance application scenarios, bringing low latency and time determinism of XCORE architecture to mainstream embedded applications, XCORE is a high-performance and multi-logic core architecture specially used for XVF3100 multi-core microcontroller, unlike traditional microcontroller chips, the XVF3100 multi-core microcontroller can execute multiple real-time tasks simultaneously and communicate between tasks using high-speed networks. Each logic core of the XVF3100 multi-core microcontroller chip can perform some tasks, it can be serviced and synchronized in the logic core, it does not need internal interrupt processing program routines, and it also has a scheduler to trigger the core by hardware resources, meanwhile, the XVF3100 multi-core microcontroller reduces three main noise sources to ensure high-quality voice capture and transmission, the three main noise sources are self-generated noise, point noise and environmental noise; the XVF3100 multi-core master chip is built-in with a plurality of XCORE chips, the plurality of XCORE chips are connected to form a high-performance system, the interconnection between each XCORE chip depends on XCORE connection switches and internal chip connections, the connection between each XCORE connection switch is based on XMOS link, the XMOS link provides physical connection between two connection switches, and the system formed by connecting a plurality of XCORE chips can realize mutual exchange, single or multiple mutual systems for algorithm, and supports many different topologies. The programmable logic control circuit is used for realizing complex control logic and automation control function, the buffer register is used as a transfer station for information transmission, and ensures that data will not be lost or delayed due to speed mismatch during transmission. The phase-locked loop feedback circuit is used for ensuring the phase synchronization between the input signal and the output signal, and ensuring that the frequency and phase of the output signal remain consistent with the input signal. The OTP6266 controller can select a noise reduction application according to the real-time communication application scene requirement, the built-in RISC-V processor core and cache, the RISC-V processor core is a chip architecture core that is simple and fast in response, and using the processor core can make the chip more suitable for specific requirements, and it is suitable for low-power and high-efficiency embedded processing, and the cache can improve the speed of accessing memory.

[0026] In the specific implementation process of the utility model, the bluetooth audio system level chip adopts ATS2853 bluetooth audio system level chip, and the ATS2853 bluetooth audio system level chip is connected with the audio power amplifier chip through a serial communication bus interface.

[0027] Specifically, the ATS2853 Bluetooth audio system level chip integrates a high-performance transceiver, a function-rich baseband processor and a Bluetooth audio mode, so that the device has stable and fast experience in the connection and transmission process, can provide high audio quality in voice calls, and ensure the intelligibility and stability of the call, and the ATS2853 Bluetooth audio system level chip is connected with the audio power amplifier chip through a serial communication bus interface, so that the intelligibility of the player call between users can be ensured.

[0028] In the embodiment of the utility model, the audio power amplifier chip adopts ACM8625M double-channel audio power amplifier chip.

[0029] The ACM8625M double-channel audio power amplifier chip is connected with a sampling circuit, which collects signals from the power amplifier bridge type load output port of the ACM8625M double-channel audio power amplifier chip for filtering and level conversion.

[0030] Specifically, the ACM8625M double-channel audio power amplifier chip is a highly integrated double-channel digital input audio power amplifier chip, which has built-in dynamic bass enhancement and voice enhancement functions and can process noise, and the ACM8625M double-channel audio power amplifier chip is connected with a sampling circuit, which collects signals from the power amplifier bridge type load output port of the ACM8625M double-channel audio power amplifier chip for filtering and level conversion, and in combination with the VF3100 processor / OTP6266 processor, the frequency spectrum of the input audio can be subdivided into multiple frequency bands again, the signals of each frequency band are downsampled and converted, each frequency band is denoised, then the single frequency band is upsampled to the original sampling rate again and recombined, and the denoising of the audio is realized.

[0031] In the embodiment of the utility model, the echo cancellation module includes a filtering circuit and a level conversion circuit.

[0032] The filtering circuit includes a first TLV9062 differential operational amplifier and a second TLV9062 differential operational amplifier, and the pin 66 of the first TLV9062 differential operational amplifier is connected with the pin 11 of the second TLV9062 differential operational amplifier.

[0033] Specifically, the multi-channel audio signal is mixed into a single-channel audio signal through the filtering circuit and the level conversion circuit, the audio signal already contains all echo information and can well correspond to the received echo audio, and the filtering circuit and the level conversion circuit of the echo cancellation module can better filter high-frequency noise. Figure 2As shown, the filter circuit includes a first TLV9062 differential operational amplifier and a second TLV9062 differential operational amplifier, the pin 66 of the first TLV9062 differential operational amplifier is connected with the pin 11 of the second TLV9062 differential operational amplifier, the TLV9062 differential operational amplifier has rail-to-rail input and output swing capability, can effectively amplify the amplitude of the input signal, amplify the weak signal to a sufficient level for subsequent circuit processing, and simultaneously form a filter circuit through the combination of the first LV9062 differential operational amplifier and the second LV9062 differential operational amplifier, so that the signal in the required frequency range can be selected, thereby filtering out high-frequency noise, and the filtered level converted signal is input to the ADC port of the audio processor for analog-to-digital conversion.

[0034] In the specific implementation process of the utility model, the power management module includes an AC / DC adapter and a linear voltage regulator.

[0035] Specifically, the AC / DC adapter provides stable power supply for the system, converts the input power current and voltage into appropriate output current and voltage, and simultaneously has overcurrent protection and overvoltage protection functions to protect the system from damage. The linear voltage regulator assists the AC / DC adapter to convert the input voltage into stable output voltage, ensuring that other components in the system can obtain the required voltage supply.

[0036] To sum up, the environmental sound noise reduction system provided by the utility model embodiment can improve the data processing performance through the XVF3100 multi-core microcontroller and the OTP6266 controller, and effectively improve the processing efficiency of the environmental sound noise reduction process. Through the cooperation of the Bluetooth audio system level chip and the echo cancellation module, the environmental noise can be better eliminated, the ACM8625M double-channel audio power amplifier chip is connected with the sampling circuit, the echo cancellation module includes a filter circuit and a level conversion circuit, high-frequency noise can be effectively filtered, and the influence of the near-end loudspeaker can be avoided. Without wearing earphones, the user can clearly communicate with players, and in an open environment, the user can also enjoy omnidirectional 3D sound effects and clear communication.

[0037] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by programs instructing related hardware, and the programs can be stored in a computer readable storage medium, and the storage medium can include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0038] In addition, the environmental sound noise reduction system provided by the embodiment of the utility model is introduced in detail, the principle and implementation mode of the utility model are described by using specific examples in this paper, the above embodiment is only used for helping understanding the method and core idea of the utility model; meanwhile, for the general technical personnel in the art, according to the idea of the utility model, the specific implementation mode and application range will have the change, and the above is not understood as the limitation of the utility model.

Claims

1. An ambient sound noise reduction system, characterized by, The environmental sound noise reduction system comprises a multi-core processor, a power management module, a Bluetooth audio system chip, an audio power amplifier chip, a digital audio processor, a speaker, an echo cancellation module, a key module, a storage module, a universal serial bus (USB) interface and a frequency band interference canceller. The multi-core processor is connected with the power management module, the Bluetooth audio system chip, the audio power amplifier chip, the digital audio processor, the speaker, the echo cancellation module, the key module, the storage module, the USB interface and the frequency band interference canceller.

2. The ambient sound noise reduction system of claim 1, wherein, The multi-core processor comprises an XVF3100 multi-core microcontroller and an OTP6266 controller.

3. The ambient sound noise reduction system of claim 2, wherein, The XVF3100 multi-core microcontroller is internally provided with a plurality of XCORE chips, a programmable logic control circuit, a buffer register and a phase-locked loop feedback circuit, and each XCORE chip is connected based on an XCORE connection switch.

4. The ambient sound noise reduction system of claim 2, wherein, The OTP6266 controller is internally provided with a RISC-V processor core and a cache register.

5. The ambient sound noise reduction system of claim 1, wherein, The Bluetooth audio system chip adopts an ATS2853 Bluetooth audio system chip, and the ATS2853 Bluetooth audio system chip is connected with the audio power amplifier chip through a serial communication bus interface.

6. The ambient sound noise reduction system of claim 1, wherein, The audio power amplifier chip adopts an ACM8625M dual-channel audio power amplifier chip.

7. The ambient sound noise reduction system of claim 6, wherein, The ACM8625M dual-channel audio power amplifier chip is connected with a sampling circuit, and the sampling circuit collects signals from a power amplifier bridge load output port of the ACM8625M dual-channel audio power amplifier chip to perform filtering and level conversion.

8. The ambient sound noise reduction system of claim 1, wherein, The echo cancellation module comprises a filtering circuit and a level conversion circuit.

9. The ambient sound noise reduction system of claim 8, wherein, The filtering circuit comprises a first TLV9062 differential operational amplifier and a second TLV9062 differential operational amplifier, and a pin 66 of the first TLV9062 differential operational amplifier is connected with a pin 11 of the second TLV9062 differential operational amplifier.

10. The ambient sound noise reduction system of claim 1, wherein, The power management module comprises an AC / DC adapter and a linear voltage stabilizer.

Images