Circuit realized based on disc array microphone multi-machine cascade connection

Abstract

The utility model relates to the technical field of circuit design, in particular to a circuit realized based on disk array microphone multi-machine cascade, which comprises a plurality of disk array microphone devices. Each microphone device comprises a main control chip module, a cascade audio signal processing module, a microphone circuit design module, a cascade audio circuit design module, a condenser microphone and an operational amplifier chip, and further comprises an interface or module for monitoring and debugging, so that a user can conveniently monitor and debug a circuit in real time. According to the utility model, a plurality of disc array microphone devices are arranged, each device is internally provided with a cascade processing circuit and algorithm and is connected in series in a hand-in-hand manner, and a main control chip module, a cascade audio signal processing module, a microphone circuit design module, a cascade audio circuit design module, a condenser microphone and an operational amplifier chip are arranged at the same time. And an interface or module for monitoring and debugging is also included, so that excellent performance can be achieved in a large-space environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit design, concretely is the circuit based on disc array microphone multi -machine cascade realization. BACKGROUND

[0002] With the progress of modern science and technology, audio processing technology and equipment play an increasingly important role in conference rooms, remote video conferences, judicial interrogations, educational environments and other scenarios. For these application scenarios, not only high-quality audio pickup and sound reinforcement systems are needed, but also the ability to adapt to the needs of different sizes of space, especially full-area uniform sound pickup in large venues. However, traditional single microphone or single array microphone devices cannot meet the uniform sound pickup needs of all areas in a large space, and when multiple microphones are configured, there are often problems with smooth sound switching. The existing audio processing technology has the following shortcomings:

[0003] 1. Limited coverage of a single device: Most devices on the market cannot implement multi-machine cascading in the sound reinforcement interactive audio processing system. In a large space environment, a single microphone or a single array microphone device can only achieve uniform sound pickup in a limited area near it, and cannot provide consistent sound capture effect in the entire large space.

[0004] 2. Sound switching problem: When multiple microphones are distributed in a larger space, the current market solution usually cannot handle the smooth switching of sound between microphones, resulting in very undesirable output sound effects, which may appear frequently switching, large and small, and even accompanied by other abnormal sounds, affecting the audience experience.

[0005] 3. Delay and efficiency problem: The existing technology often accompanies high delay when processing signals between microphones, which not only reduces the real-time performance of audio signals, but also may cause echo or other quality problems in voice communication, further weakening the user experience.

[0006] 4. Lack of advanced audio processing capabilities: Some traditional devices may not have advanced audio processing algorithms such as automatic feedback suppression (AFC), automatic noise suppression (ANS), AI noise reduction, automatic echo cancellation (AEC), automatic gain control (AGC), etc. Therefore, it cannot effectively improve the quality of voice sound reinforcement interaction, especially in complex environments such as spaces with background noise or reverberation.

[0007] 5. Installation and maintenance inconvenience: The deployment of a multi-microphone system is usually complex, requiring professional wiring and technical support, and once a problem occurs, debugging and maintenance will also become difficult. INVENTION CONTENTS

[0008] The utility model discloses a purpose at providing based on disc array microphone multi -machine cascade realization's circuit, to solve above -mentioned background art in the single microphone or array microphone equipment of proposal, there is limitation when picking up in big space, difficult to realize the even pick -up of full area, can no longer satisfy the demand of current large -scale meeting place etc. to high -quality audio acquisition problem.

[0009] To realize above -mentioned purpose, the utility model provides the following technical scheme:

[0010] Based on disc array microphone multi -machine cascade realization's circuit, including a plurality of disc array microphone equipment, every microphone equipment is built -in with cascade processing circuit and algorithm, is used in big space environment through hand -in -hand mode series connection, every microphone equipment includes main control chip module, cascade audio signal processing module, microphone circuit design module, cascade audio circuit design module, condenser microphone and operational amplifier chip, still includes the interface or module for monitoring and debugging, to facilitate user real -time monitoring and debugging to the circuit, main control chip module passes through the execution audio signal processing algorithm, promotes the quality of voice expansion interaction, realizes 5A intelligent audio algorithm.

[0011] As preferred, the main control chip module adopts an audio processor, and the audio processor has at least four cores and a main frequency of no less than 1.5 GHz.

[0012] As preferred, the 5A intelligent audio algorithm includes automatic feedback suppression (AFC), automatic noise suppression (ANS), automatic echo cancellation (AEC), automatic gain control (AGC), and reverberation suppression (ARR).

[0013] As preferred, the cascade audio signal processing module adopts an FPGA chip to process the cascade audio signal, and the FPGA chip is used to process the signal switched between microphones, realize low-delay and high-efficiency processing of the audio signal, improve the sound quality effect of the cascade sound and the real-time performance of the sound, and realize smooth switching and inductive switching between the microphones.

[0014] As preferred, the microphone circuit design module adopts a low-noise circuit design to improve the driving capacity of the microphone signal transmission and the signal-to-noise ratio of the sound signal sampling.

[0015] As preferred, the cascade audio circuit includes a digital-to-analog converter (DAC) and an analog-to-digital converter (ADC).

[0016] As preferred, the digital-to-analog converter (DAC) is used to improve the signal-to-noise ratio of the algorithm and the cascade signal output conversion, and restore high-quality audio signals.

[0017] As preferred, the analog-to-digital converter ADC is used to provide high-quality digital signals for the audio processor and FPGA, thereby improving the efficiency of the master audio algorithm and the quality of the algorithm, and is used to improve the quality of the cascaded signal processing, and output digital signals with higher signal-to-noise ratio.

[0018] As preferred, the operational amplifier chip is used to pre-amplify the weak signal of the microphone, thereby improving the real restoration degree of the sound signal.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1、In the circuit realized by the multiple machine cascading based on the disc array microphone, multiple disc array microphone devices are arranged, and each device is internally provided with a cascading processing circuit and algorithm and is connected in a hand-in-hand manner, and is simultaneously provided with a master control chip module, a cascaded audio signal processing module, a microphone circuit design module, a cascaded audio circuit design module, a condenser microphone, and an operational amplifier chip, and further contains an interface or module for monitoring and debugging, so that the circuit realized by the multiple machine cascading based on the disc array microphone can play excellent performance in a large space environment. The master control chip module executes an audio signal processing algorithm to realize 5A intelligent audio algorithm, thereby improving the quality of voice amplification interaction and providing high-quality audio experience; the FPGA chip in the cascaded audio signal processing module processes the cascaded audio signal, realizes low-delay and high-efficiency switching between microphones, guarantees the sound quality effect and sound real-time performance, and makes the switching process smooth and inapparent; the low-noise microphone circuit design module improves the driving capability of microphone signal transmission and the signal-to-noise ratio of sound signal sampling, and ensures the purity of the audio signal; the digital-to-analog converter DAC and the analog-to-digital converter ADC of the cascaded audio circuit design module improve the signal-to-noise ratio of algorithm and cascaded signal output conversion, provide high-quality digital signals for the audio processor and FPGA, and improve the algorithm efficiency and cascaded signal processing quality; the condenser microphone can effectively collect sound signals; the operational amplifier chip pre-amplifies the weak signal of the microphone, guarantees the real restoration degree of the sound signal; and the monitoring and debugging interface or module facilitates the user to monitor and debug the circuit in real time, so that the circuit has good operability and maintainability, and the overall effect and convenience of audio collection, processing, and amplification interaction in a large space environment are improved.

[0021] 2. In this circuit based on the cascading of multiple microphones in a circular array, the cascaded audio signal processing module uses an FPGA chip to process the cascaded audio signals. The FPGA chip is used to process the switching signals between microphones, achieving low latency and high efficiency in processing audio signals, improving the sound quality and real-time performance of the cascaded sound, and enabling smooth and seamless switching between microphones. By using an FPGA chip in the cascaded audio signal processing module, the chip can process the switching signals between microphones with low latency and high efficiency, ensuring the sound quality and real-time performance of the cascaded sound, enabling smooth and seamless switching between microphones, and improving the overall system stability and user experience.

[0022] 3. In this circuit based on the cascading of multiple microphone arrays, the cascaded audio circuit includes a digital-to-analog converter (DAC) and an analog-to-digital converter (ADC). The DAC is used to improve the signal-to-noise ratio (SNR) of the algorithm and the cascaded signal output, restoring high-quality audio signals. The ADC provides high-quality digital signals to the audio processor and FPGA, thereby improving the efficiency and quality of the main audio algorithm and enhancing the quality of cascaded signal processing, outputting digital signals with higher SNR. The cascaded audio circuit, including a high-quality DAC and ADC, ensures excellent performance across the entire audio processing chain. The DAC improves the SNR of the algorithm and the cascaded signal output, restoring high-quality audio signals; the ADC provides high-quality digital signals to the audio processor and FPGA, thereby improving the efficiency and quality of the main audio algorithm and enhancing the quality of cascaded signal processing, outputting digital signals with higher SNR. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are explained in detail together with the embodiments of the present invention, but do not constitute a limitation thereof.

[0024] Figure 1 This is a flowchart illustrating the working principle of the cascaded implementation system of this utility model.

[0025] Figure 2 This is a block diagram illustrating the working principle of the cascaded disc array microphone of this utility model;

[0026] Figure 3 This is the circuit schematic diagram of the audio processing module of this utility model;

[0027] Figure 4 This is the schematic diagram of the microphone circuit design of this utility model;

[0028] Figure 5 This is one of the schematic diagrams of the cascaded circuit of this utility model;

[0029] Figure 6 For the utility model cascade circuit schematic diagram two of the utility model;

[0030] Figure 7 For the utility model cascade audio signal processing circuit schematic diagram. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the embodiments of the utility model and the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] The circuit realized based on the multi-machine cascade of the disc array microphone, like Figure 1 And Figure 2As shown, the application comprises a plurality of disc array microphone devices, each of which is internally provided with cascade processing circuit and algorithm, connected in series in a hand-in-hand manner in a large space environment, each of which comprises a master control chip module, a cascade audio signal processing module, a microphone circuit design module, a cascade audio circuit design module, a condenser microphone and an operational amplifier chip, and further comprises an interface or module for monitoring and debugging to facilitate real-time monitoring and debugging of the circuit by the user; the master control chip module improves the quality of voice sound reinforcement interaction by executing audio signal processing algorithm, and realizes 5A intelligent audio algorithm; by setting a plurality of disc array microphone devices, each of which is internally provided with cascade processing circuit and algorithm and connected in series in a hand-in-hand manner, and further equipped with a master control chip module, a cascade audio signal processing module, a microphone circuit design module, a cascade audio circuit design module, a condenser microphone and an operational amplifier chip, and containing an interface or module for monitoring and debugging, the circuit realized based on the disc array microphone multi-machine cascade can perform outstanding performance in a large space environment. The master control chip module executes the audio signal processing algorithm to realize the 5A intelligent audio algorithm, thereby improving the quality of voice sound reinforcement interaction and providing high-quality audio experience; the FPGA chip in the cascade audio signal processing module processes the cascade audio signal to realize low-delay and high-efficiency switching between microphones, guaranteeing sound quality effect and sound real-time performance, making the switching process smooth and inapparent; the low-noise microphone circuit design module improves the driving capability of microphone signal transmission and the signal-to-noise ratio of sound signal sampling, ensuring the purity of audio signal; the digital-to-analog converter DAC and analog-to-digital converter ADC of the cascade audio circuit design module improve the signal-to-noise ratio of algorithm and cascade signal output conversion, providing high-quality digital signals for the audio processor and FPGA, and improving the algorithm efficiency and cascade signal processing quality; the condenser microphone can effectively collect sound signals; the operational amplifier chip pre-amplifies the weak signal of the microphone to ensure the true restoration degree of the sound signal; and the monitoring and debugging interface or module facilitates real-time monitoring and debugging of the circuit by the user, making the circuit have good operability and maintainability, and improving the effect and convenience of audio acquisition, processing and sound reinforcement interaction in a large space environment.

[0033] Further, as shown in the drawings, Figure 3 The master control chip module adopts an audio processor, which has at least four cores and a main frequency not lower than 1.5GHz, so that the system can efficiently run complex 5A intelligent audio algorithm, improve the speed and efficiency of audio processing, and ensure excellent voice interaction quality and real-time response capability in a large-scale cascade scenario.

[0034] Specifically, the 5A intelligent audio algorithm includes automatic feedback suppression (AFC), automatic noise suppression (ANS), automatic echo cancellation (AEC), automatic gain control (AGC), and reverberation suppression (ARR). Through the integrated 5A intelligent audio algorithm, the system can automatically adapt to different acoustic environments, effectively suppress feedback, noise, echo, and reverberation, and automatically adjust the gain to maintain the stability and clarity of the sound, so that high-quality voice amplification and interactive experience can be achieved even in complex and variable environments.

[0035] As shown in Figure 7 , the cascaded audio signal processing module uses an FPGA chip to process the cascaded audio signal. The FPGA chip is used to process the switching signal between microphones, realize low-latency and high-efficiency processing of the audio signal, improve the sound quality effect of the cascaded sound and the real-time performance of the sound, and realize smooth switching and inductive switching between microphones. The cascaded audio signal processing module uses an FPGA chip, which can process the switching signal between microphones with low latency and high efficiency, ensure the sound quality effect of the cascaded sound and the real-time performance of the sound, realize smooth and inductive switching between microphones, and improve the stability of the overall system and the user experience.

[0036] As shown in Figure 4 , the microphone circuit design module uses a low-noise circuit design to improve the driving capability of the microphone signal transmission and the signal-to-noise ratio of the sound signal sampling. The microphone circuit design module uses a low-noise circuit design to effectively improve the driving capability of the microphone signal transmission and the signal-to-noise ratio of the sound signal sampling, so that the system can capture more pure and clear sound signals and provide high-quality input for subsequent audio processing.

[0037] As shown in Figure 5 and Figure 6 , the cascaded audio circuit includes a digital-to-analog converter (DAC) and an analog-to-digital converter (ADC). The digital-to-analog converter (DAC) is used to improve the signal-to-noise ratio of the algorithm and the output conversion of the cascaded signal, and restore high-quality audio signals. The analog-to-digital converter (ADC) is used to provide high-quality digital signals for the audio processor and the FPGA, thereby improving the efficiency of the main control audio algorithm and the quality of the algorithm, and improving the quality of the cascaded signal processing and outputting higher signal-to-noise ratio digital signals. The cascaded audio circuit includes high-quality DAC and ADC. The DAC is used to improve the signal-to-noise ratio of the algorithm and the output conversion of the cascaded signal, and restore high-quality audio signals. The ADC provides high-quality digital signals for the audio processor and the FPGA, thereby improving the efficiency of the main control audio algorithm and the quality of the algorithm, and improving the quality of the cascaded signal processing and outputting higher signal-to-noise ratio digital signals, ensuring excellent performance of the entire audio processing link.

[0038] In addition, the operational amplifier chip is used for pre-amplifying the weak signal of the microphone, improving the real restoration degree of the sound signal, and the weak signal of the microphone is pre-amplified through the operational amplifier chip, so that the real restoration degree of the sound signal is effectively improved, and even in the case of long distance or low volume, clear and full sound can be captured, thereby providing a solid foundation for subsequent audio processing and sound amplification.

[0039] The working principle of the circuit realized by the multi-device cascade of the disc array microphone is as follows:

[0040] The plurality of disc array microphone devices are connected in series in a hand-in-hand manner, the main control chip module built-in each device adopts an audio processor with at least four cores and a main frequency not lower than 1.5GHz, executes 5A intelligent audio algorithm, and performs multi-aspect processing on the audio signal, such as automatic feedback suppression and noise suppression. The FPGA chip in the cascade audio signal processing module is responsible for processing the switching signal between the microphones, ensuring low delay and high efficiency of the signal processing, and making the sound switching smooth. The low noise circuit design of the microphone circuit design module ensures high signal-to-noise ratio of the sound signal sampling, and improves the signal transmission driving capability. The analog-to-digital converter ADC in the cascade audio circuit converts the collected analog audio signal into a high-quality digital signal, provides high-quality input for the audio processor and the FPGA chip, and after processing, the digital-to-analog converter DAC converts the processing result into a high-quality analog audio signal output. The operational amplifier chip pre-amplifies the weak signal of the microphone, and enhances the signal strength. During the whole process, the monitoring and debugging interface facilitates the user to monitor and adjust the circuit state in real time, realizes high-quality audio acquisition, processing and sound amplification interaction in a large space environment.

[0041] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and do not limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. Circuit for implementing multi-device cascading based on a circular array of microphones, characterized in that: The application relates to a plurality of disc array microphone devices, each of which is internally provided with a cascade processing circuit and an algorithm, is connected in series in a large space environment in a hand-in-hand mode, and comprises a master control chip module, a cascade audio signal processing module, a microphone circuit design module, a cascade audio circuit design module, a condenser microphone and an operational amplifier chip. The master control chip module improves the quality of voice amplification interaction by executing an audio signal processing algorithm, and realizes 5A intelligent audio algorithm.

2. The circuit based on the multi-machine cascade implementation of the circular disc array microphone according to claim 1, characterized in that: The master control chip module adopts an audio processor, and the audio processor has at least four cores and a frequency not lower than 1.5 GHz.

3. The circuit based on the multi-machine cascade implementation of the circular disc array microphone according to claim 1, characterized in that: The 5A intelligent audio algorithm comprises automatic feedback suppression (AFC), automatic noise suppression (ANS), automatic echo cancellation (AEC), automatic gain control (AGC) and reverberation suppression (ARR).

4. The circuit based on the multi-machine cascade implementation of the circular disc array microphone according to claim 1, characterized in that: The cascade audio signal processing module adopts an FPGA chip to process cascade audio signals, the FPGA chip is used for processing signals for switching between microphones, realizes low-delay and high-efficiency processing of audio signals, improves the sound quality effect of cascade sound and the real-time performance of sound, and realizes smooth switching and inductive switching between microphones.

5. The circuit based on the multi-machine cascade implementation of the circular disc array microphone according to claim 1, characterized in that: The microphone circuit design module adopts a low-noise circuit design, and is used for improving the driving capacity of microphone signal transmission and the signal-to-noise ratio of sound signal sampling.

6. The circuit realized by cascading multiple units based on the disc array microphone according to claim 1, characterized in that: The cascade audio circuit comprises a digital-to-analog converter (DAC) and an analog-to-digital converter (ADC).

7. The circuit realized by cascading multiple units based on the disc array microphone according to claim 6, characterized in that: The digital-to-analog converter (DAC) is used for improving the signal-to-noise ratio of algorithm and cascade signal output conversion and restoring high-quality audio signals.

8. The circuit realized by cascading multiple units based on the disc array microphone according to claim 6, characterized in that: The analog-to-digital converter (ADC) is used for providing high-quality digital signals for an audio processor and an FPGA, thereby improving the efficiency of master control audio algorithm and the quality of algorithm, and improving the quality of cascade signal processing and outputting digital signals with higher signal-to-noise ratio.

9. The circuit realized by cascading multiple units based on the disc array microphone according to claim 1, characterized in that: The operational amplifier chip is used for preamplification processing of weak signals of the microphone, and improves the real restoration degree of sound signals.

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