Audio information acquisition and processing device

Abstract

The utility model relates to the technical field of audio processing, in particular to an audio information acquisition and processing device, which comprises an acquisition module, a processing module, an output module and a judgment control module, and is characterized in that the acquisition module is connected with the output module through the processing module; the judgment control module comprises a signal conversion module, a comparison module, a reference module and a main control chip; the output end of the signal conversion module is connected with the input end of the comparison module, and the input end of the signal conversion module and the output end of the comparison module are respectively connected into the processing module; the main control chip is connected with the comparison module through the reference module; the processing module comprises a primary processing module, a secondary processing module and a switch module, and the output end of the primary processing module is connected with the secondary processing module through the switch module; the control end of the switch module is connected with the output end of the comparison module. The utility model solves the technical problem that the audio quality is reduced or distorted because the audio information acquisition and processing device cannot respond to the audio signal change in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of audio processing, and more specifically, to an audio information acquisition and processing device. Background Art

[0002] An audio information acquisition and processing device is a device specifically used for collecting, processing, and transmitting audio signals. It mainly consists of an acquisition module, a processing module, and an output module. The working process is as follows: the acquisition module collects the sound signals in the environment and converts them into electrical signals, and after the conversion is completed, it transmits them to the processing module; after receiving the electrical signal, the processing module performs processing such as filtering and amplification on it to enhance the sound quality, and after the processing is completed, it outputs the signal to the output module; the output module stably transmits the processed signal to the subsequent playback device. In the prior art, audio information acquisition and processing devices mainly rely on fixed circuits and preset parameters to work. With the increasing richness and complexity of audio application scenarios, traditional audio information acquisition and processing devices gradually expose their limitations.

[0003] In traditional audio information acquisition and processing devices, the fixed signal transmission path and processing module are difficult to flexibly cope with the changing audio environment, such as clear sound pickup in a strong noise background, effective capture of distant sounds, etc., resulting in the difficulty of ensuring audio quality under specific conditions; moreover, the non-adjustability of preset parameters limits the device's deep processing ability of audio signals and cannot be adjusted according to actual needs, thus unable to meet users' pursuit of high-quality and diverse audio experiences. Therefore, it is of great significance to solve the deficiencies of traditional audio information acquisition and processing devices in terms of flexibility and adaptability to improve audio signal quality and meet diverse audio application requirements.

[0004] The Chinese utility model patent with the patent name "An Audio Acquisition and Preprocessing Device" and the publication number CN207968876U, which has been publicly disclosed, includes a housing, an audio signal acquisition circuit, a programmable low-pass filter circuit, a gain-adjustable amplifier circuit, a single-chip microcomputer, an LCD liquid crystal display screen, and buttons. This utility model patent can effectively filter out high-frequency clutter and the sampling frequency band is adjustable. However, this utility model requires manual adjustment of the sampling frequency band, and in some audio occasions that require real-time processing (such as video conferences, large event sites, etc.), it cannot respond to the changes of audio signals in a timely manner, which is likely to lead to a decline or distortion of audio quality. Summary of the Utility Model

[0005] The purpose of this application is to provide an audio information acquisition and processing device, which solves the technical problem that the existing audio information acquisition and processing device cannot respond to the changes of audio signals in a timely manner, thereby leading to a decline or distortion of audio quality.

[0006] To solve the above technical problems, the solution adopted in this application is as follows:

[0007] The utility model provides an audio information acquisition and processing device, which includes an acquisition module, a processing module, an output module, and a judgment and control module. The acquisition module is connected to the output module through the processing module, and the judgment and control module is connected to the processing module. It is characterized in that: the judgment and control module includes a signal conversion module, a comparison module, a reference module, and a main control chip; the output end of the signal conversion module is connected to the input end of the comparison module, and the input end of the signal conversion module and the output end of the comparison module are respectively connected to the processing module; the main control chip is connected to the comparison module through the reference module.

[0008] In some embodiments, the processing module includes a primary processing module, a secondary processing module, and a switch module. The output end of the primary processing module is connected to the secondary processing module through the switch module; the control end of the switch module is connected to the output end of the comparison module.

[0009] In some embodiments, the switch module includes a first switch element and a second switch element. The control ends of the first switch element and the second switch element are connected, and the input end is set as the control end of the switch module here; the input ends of the first switch element, the second switch element, and the output end of the primary processing module are connected, and the output ends of the first switch element and the second switch element are respectively connected to the secondary processing module.

[0010] In some embodiments, both the first switch element and the second switch element are field effect transistors.

[0011] In some embodiments, the signal conversion module includes a peak detection circuit. The peak detection circuit includes a diode, a capacitor, and a resistor. The resistor and the capacitor are connected in parallel and in series with the diode. The positive electrode of the diode is set as the input end of the signal conversion module, and the negative electrode of the diode is set as the output end of the signal conversion module.

[0012] In some embodiments, the reference module includes an upper limit reference circuit and a lower limit reference circuit. The input ends of the upper limit reference circuit and the lower limit reference circuit are respectively connected to the main control chip; the output ends of the upper limit reference circuit and the lower limit reference circuit are respectively connected to the comparison module.

[0013] In some embodiments, the comparison module includes an upper limit comparator and a lower limit comparator. The positive input terminal of the upper limit comparator and the negative input terminal of the lower limit comparator are connected, and an input terminal is set here as the input terminal of the comparison module; the output terminals of the upper limit comparator and the lower limit comparator are connected, and an output terminal is set here as the output terminal of the comparison module; the negative input terminal of the upper limit comparator is connected to the output terminal of the upper limit reference circuit, and the positive input terminal of the lower limit comparator is connected to the output terminal of the lower limit reference circuit.

[0014] In some embodiments, diodes are respectively provided at the output terminals of the upper limit comparator and the lower limit comparator.

[0015] In some embodiments, the main control chip model is STM32F103C8T6.

[0016] The technical solution of this application has at least the following advantages and beneficial effects:

[0017] The utility model includes a judgment control module and a processing module. The processing module includes a primary processing module, a secondary processing module, and a switching module. The judgment control module continuously monitors the quality of the audio signal output by the primary processing module, controls the switching module according to the real-time evaluation result, and dynamically switches the signal transmission path in the secondary processing module. This design ensures that the audio signal can adapt to changes immediately during the processing process, effectively preventing the signal quality from deteriorating or being distorted, thereby ensuring the stability of the subsequent audio signal processing circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the circuit diagram of the judgment control module of the utility model;

[0019] Figure 2 It is the circuit diagram of the processing module of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. If terms such as "center", "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. It should also be noted that unless otherwise clearly specified and defined, if terms such as "set", "install", "connect" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] Embodiment 1

[0023] Please refer to Figure 1 - Figure 2 , the present utility model provides an audio information acquisition and processing device. The same as the prior art, it includes an acquisition module, a processing module, an output module, and a judgment and control module. The acquisition module is connected to the output module through the processing module, and the judgment and control module is connected to the processing module;

[0024] The acquisition module includes a microphone, which is used to convert the collected sound wave signal into an electrical signal;

[0025] The processing module performs a series of processing operations on the electrical signal transmitted by the acquisition module, including but not limited to filtering, amplification, and analog-to-digital conversion;

[0026] The judgment and control module is used to control the processing work of the processing module on the signal to ensure the accurate processing of the audio signal;

[0027] The output module includes a digital-to-analog converter and a power amplifier circuit. The processed audio electrical signal is sequentially converted into an audio analog signal through the digital-to-analog converter and the power amplifier circuit and transmitted to the playback device. The playback device converts the audio analog signal into a sound wave and outputs it.

[0028] Different from the prior art, the judgment and control module includes a signal conversion module, a comparison module, a reference module, and a main control chip; the output end of the signal conversion module is connected to the input end of the comparison module, and the input end of the signal conversion module and the output end of the comparison module are respectively connected to the processing module; the main control chip is connected to the comparison module through the reference module.

[0029] The signal conversion module includes a peak detection circuit. The peak detection circuit includes a diode, a capacitor, and a resistor. The resistor and the capacitor are in parallel and in series with the diode. The positive electrode of the diode is set as the input end of the signal conversion module, and the negative electrode of the diode is set as the output end of the signal conversion module;

[0030] It should be noted that the signal conversion module receives an audio signal from the processing module and converts the received audio signal for subsequent comparison and analysis by the comparison module.

[0031] The reference module includes an upper limit reference circuit and a lower limit reference circuit. The input ends of the upper limit reference circuit and the lower limit reference circuit are respectively connected to the main control chip; the output ends of the upper limit reference circuit and the lower limit reference circuit are respectively connected to the comparison module;

[0032] The comparison module includes an upper limit comparator and a lower limit comparator. The positive input end of the upper limit comparator and the negative input end of the lower limit comparator are connected, and an input end is set here as the input end of the comparison module; the output ends of the upper limit comparator and the lower limit comparator are connected, and an output end is set here as the output end of the comparison module; the negative input end of the upper limit comparator is connected to the output end of the upper limit reference circuit, and the positive input end of the lower limit comparator is connected to the output end of the lower limit reference circuit;

[0033] Diodes are respectively provided at the output ends of the upper limit comparator and the lower limit comparator.

[0034] It should be noted that the staff can control the reference module through the main control chip according to actual needs, thereby adjusting the threshold parameter range in the comparison module to optimize the signal recognition and processing conditions, improving the adaptability and flexibility of the device.

[0035] Furthermore, the judgment control module includes comparators U1, U2, diodes D1, D2, D3, capacitor C1, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9; triodes Q1, Q2;

[0036] Among them, the peak detection circuit includes diode D1, capacitor C1, resistor R9; the comparison module includes comparators U1, U2, resistors R7, R8, diodes D2, D3; the reference module includes resistors R1, R2, R3, R4, R5, R6, triodes Q1, Q2;

[0037] It should be noted that the upper limit comparator includes comparator U2, resistor R8; the lower limit comparator includes comparator U1, resistor R7; the upper limit reference circuit includes resistors R4, R5, R6, triode Q2; the lower limit reference circuit includes resistors R1, R2, R3, triode Q1.

[0038] Specifically, the positive electrode of diode D1 is set as the D_IN2 input terminal, and the negative electrode of diode D1, one end of capacitor C1, one end of resistor R9, the positive input terminal of comparator U1, and the negative input terminal of comparator U2 are connected; the other end of capacitor C1 and the other end of resistor R9 are connected and grounded; the base of triode Q1 is set as the D_IN1 input terminal, and the emitter of triode Q1 is connected to one end of resistor R3 and grounded; the collector of triode Q1 is connected to one end of resistor R1, and the other end of resistor R1, one end of resistor R2, the other end of resistor R3, and the negative input terminal of comparator U1 are connected, and the other end of resistor R2 is connected to the positive power supply; pin 5 of comparator U1 is connected to the positive power supply, and pin 1 of comparator U1, pin 5 of comparator U2, one end of resistor R7, and one end of resistor R8 are connected and grounded. The output terminal of comparator U1, the other end of resistor R7, and the positive electrode of diode D2 are connected. The negative electrodes of diode D2 and diode D3 are connected, and the D_OUT output terminal is set here; the positive electrode of diode D3, the other end of resistor R8, and the output terminal of comparator U2 are connected. Pin 4 of comparator U2 and one end of resistor R6 are connected and connected to the positive power supply; the positive input terminal of comparator U2, one end of resistor R4, one end of resistor R5, and the other end of resistor R6 are connected, and the other end of resistor R5 is connected to the emitter of triode Q2 and grounded; the collector of triode Q2 is connected to the other end of resistor R4, and the base of triode Q2 is set as the D_IN3 input terminal.

[0039] It should be noted that the D_IN1 input terminal and the D_IN3 input terminal are respectively connected to different pins of the main control chip, and the D_IN2 input terminal and the D_OUT output terminal are respectively connected to the processing module.

[0040] It should be noted that both triode Q1 and triode Q2 are NPN triodes.

[0041] The processing module includes a primary processing module, a secondary processing module, and a switching module. The output terminal of the primary processing module is connected to the secondary processing module through the switching module; the control terminal of the switching module is connected to the output terminal of the comparison module;

[0042] The switching module includes a first switching element and a second switching element. The control terminals of the first switching element and the second switching element are connected, and the input terminal is set as the control terminal of the switching module here; the input terminals of the first switching element, the second switching element, and the output terminal of the primary processing module are connected, and the output terminals of the first switching element and the second switching element are respectively connected to the secondary processing module.

[0043] It should be noted that both the first switching element and the second switching element are field effect transistors; specifically, the first switching element is an NMOS transistor, and the second switching element is a PMOS transistor.

[0044] Further, the processing module includes operational amplifiers U3 and U4, voltage follower U5, switching element one Q3, switching element two Q4, inductors L1 and L2, capacitors C2, C3, C4, C5, C6, C7, C8, C9, and resistors R10, R11, R12, R13, R14, R15, R16, R17, R18;

[0045] Among them, the primary processing module includes operational amplifier U3, capacitors C2, C3, C4, resistors R10, R11, R12, R13, and inductor L1; the secondary processing module includes operational amplifier U4, voltage follower U5, capacitors C6, C7, C8, C9, resistors R16, R17, and inductor L2;

[0046] It should be noted that in this embodiment, the processing module is in a band-pass filtering mode; as an implementable mode, the processing module can also be designed in a low-pass filtering mode;

[0047] It should be noted that in the secondary processing module, operational amplifier U4, capacitors C7, C8, and resistors R16, R17 form a first channel; voltage follower U5 and capacitor C6 form a second channel;

[0048] It should be noted that the difference between the first channel and the second channel is that the first channel can filter and amplify the audio signal output by the primary processing module again; the second channel can directly transmit the audio signal output by the primary processing module to the subsequent circuit.

[0049] Specifically, one end of resistor R10 is connected to one end of inductor L1, and the CH_IN1 input terminal is set here. The other end of resistor R10, one end of capacitor C4, one end of capacitor C2, one end of resistor R12, one end of capacitor C3, and one end of resistor R18 are connected; the other end of inductor L1, the other end of capacitor C4, the other end of resistor R12, and one end of resistor R13 are connected and grounded; the other end of resistor R13 is connected to the positive input terminal of operational amplifier U3. The pin 5 of operational amplifier U3 is connected to the negative power supply, and the pin 2 is connected to the positive power supply; the other end of capacitor C2, one end of resistor R11, and the negative input terminal of operational amplifier U3 are connected; the other end of resistor R11, the other end of capacitor C3, the output terminal of operational amplifier U3, one end of capacitor C5, and the drain of switch element Q3 are connected and the T_OUT output terminal is set here; the source of switch element Q3 is connected to one end of capacitor C6, and the other end of capacitor C6, one end of resistor R17, and the positive input terminal of voltage follower U5 are connected; the pin 2 of voltage follower U5 is connected to the pin 2 of operational amplifier U4 and connected to the positive power supply. The pin 5 of operational amplifier U4 is connected to the negative power supply. The positive input terminal of operational amplifier U4 is connected to one end of resistor R16; the other end of resistor R16 is connected to the other end of resistor R17 and grounded; the negative input terminal of operational amplifier U4, one end of capacitor C7, and one end of capacitor C8 are connected. The other end of capacitor C7, one end of resistor R15, and the drain of switch element Q4 are connected. The source of switch element Q4, the other end of capacitor C5, and one end of resistor R14 are connected. The other end of resistor R14 is connected to the other end of resistor R15 and grounded; the gate of switch element Q3 and the gate of switch element Q4 are connected and the CON_IN input terminal is set here; the other end of resistor R18, the other end of capacitor C8, the output terminal of operational amplifier U4, the output terminal of voltage follower U5, the negative input terminal of voltage follower U5, one end of inductor L2, and one end of capacitor C9 are connected; the other end of inductor L2 is grounded, and the other end of capacitor C9 is set as the CH_OUT output terminal.

[0050] It should be noted that the CH_IN input terminal is the audio signal input terminal, and the CH_OUT output terminal is the audio signal output terminal; the CON_IN input terminal is connected to the D_OUT output terminal, and the T_OUT output terminal is connected to the D_IN2 input terminal.

[0051] For easy understanding, the working process of the present invention is described as follows:

[0052] The audio signal collected by the acquisition module is transmitted from the CH_IN input terminal to the primary processing module. The primary processing module filters and amplifies the signal. After completion, the initially amplified signal is output from the T_OUT output terminal to the D_IN2 input terminal in the judgment and control module;

[0053] The D_IN2 input terminal receives the initially amplified analog signal. The peak detection circuit converts the analog signal into a stable DC voltage, and this DC voltage value is stabilized near the peak value of the analog signal. After the processing is completed, it is transmitted to the comparison circuit;

[0054] The comparison circuit determines whether the DC voltage value is within the set range;

[0055] If it is determined that the DC voltage is within the reference range, D_OUT outputs a low level. At this time, the first switching element Q3 is cut off and the second switching element Q4 is turned on, that is, the first channel is opened and the second channel is closed. The audio signal output by the primary processing module is filtered and amplified again when passing through the secondary processing module. After completion, the audio signal after secondary amplification is transmitted from the CH_OUT output terminal to the output module;

[0056] If it is determined that the DC voltage is not within the reference range, D_OUT outputs a high level. At this time, the first switching element Q3 is turned on and the second switching element Q4 is cut off, that is, the first channel is closed and the second channel is opened. The audio signal output by the primary processing module is directly transmitted from the CH_OUT output terminal to the output module through the secondary processing module;

[0057] It should be noted that the processing module further includes an analog-to-digital converter and a digital signal processor. The secondary processing module is sequentially connected to the analog-to-digital converter, the digital signal processor, and the audio-video codec; the analog-to-digital converter is used to convert the analog audio signal transmitted by the secondary processing module into a digital signal; the digital signal processor is used to further process the received digital signal, and the processing methods include but are not limited to echo cancellation, noise suppression, and equalizer adjustment. The analog-to-digital converter and the digital signal processor belong to the prior art and will not be described in detail here.

[0058] It should be noted that the main control chip model is STM32F103C8T6.

[0059] This judgment and control module can monitor the quality of the primary audio signal in real time and flexibly control the switching of the signal path in the secondary processing module according to the evaluation result, ensuring that the audio signal can quickly adapt to changes, avoiding quality degradation or distortion, and thus maintaining the stability of the entire audio processing device.

[0060] So far, the embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details well known in the art have not been described. Those skilled in the art can clearly understand how to implement the technical solutions of the present invention based on the above description. The scope of the present invention is defined by the appended claims.

Claims

1. An audio information acquisition and processing device, comprising an acquisition module, a processing module, an output module, and a judgment and control module, wherein the acquisition module is connected to the output module through the processing module, and the judgment and control module is connected to the processing module; characterized in that: The judgment and control module includes a signal conversion module, a comparison module, a reference module, and a main control chip; the output end of the signal conversion module is connected to the input end of the comparison module, and the input end of the signal conversion module and the output end of the comparison module are respectively connected to the processing module; the main control chip is connected to the comparison module through the reference module.

2. The audio information acquisition and processing device according to claim 1, characterized in that, The processing module includes a primary processing module, a secondary processing module, and a switch module. The output end of the primary processing module is connected to the secondary processing module through the switch module; the control end of the switch module is connected to the output end of the comparison module.

3. An audio information acquisition and processing device according to claim 2, characterized in that, The switch module includes a first switch element and a second switch element. The control ends of the first switch element and the second switch element are connected, and the input end is set as the control end of the switch module here; the input ends of the first switch element, the second switch element, and the output end of the primary processing module are connected, and the output ends of the first switch element and the second switch element are respectively connected to the secondary processing module.

4. An audio information acquisition and processing device according to claim 3, characterized in that Both the first switch element and the second switch element are field effect transistors.

5. An audio information acquisition and processing device according to claim 1, characterized in that, The signal conversion module includes a peak detection circuit. The peak detection circuit includes a diode, a capacitor, and a resistor. The resistor and the capacitor are connected in parallel and in series with the diode. The positive electrode of the diode is set as the input end of the signal conversion module, and the negative electrode of the diode is set as the output end of the signal conversion module.

6. An audio information acquisition and processing device according to claim 1, characterized in that The reference module includes an upper limit reference circuit and a lower limit reference circuit. The input ends of the upper limit reference circuit and the lower limit reference circuit are respectively connected to the main control chip; the output ends of the upper limit reference circuit and the lower limit reference circuit are respectively connected to the comparison module.

7. An audio information acquisition and processing device according to claim 6, characterized in that, The comparison module includes an upper limit comparator and a lower limit comparator. The positive input end of the upper limit comparator and the negative input end of the lower limit comparator are connected, and the input end is set as the input end of the comparison module here; the output ends of the upper limit comparator and the lower limit comparator are connected, and the output end is set as the output end of the comparison module here; the negative input end of the upper limit comparator is connected to the output end of the upper limit reference circuit, and the positive input end of the lower limit comparator is connected to the output end of the lower limit reference circuit.

8. An audio information acquisition and processing device according to claim 7, characterized in that Diodes are respectively provided at the output ends of the upper limit comparator and the lower limit comparator.

9. An audio information acquisition and processing device according to claim 1, characterized in that, The model of the main control chip is STM32F103C8T6.

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