CN220830535U - Conference terminal with voice noise reduction function - Google Patents
Conference terminal with voice noise reduction function Download PDFInfo
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- CN220830535U CN220830535U CN202322457355.0U CN202322457355U CN220830535U CN 220830535 U CN220830535 U CN 220830535U CN 202322457355 U CN202322457355 U CN 202322457355U CN 220830535 U CN220830535 U CN 220830535U
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Abstract
The utility model discloses a voice noise reduction conference terminal, which can collect voice information of a user through a pickup circuit, can carry out analog-to-digital conversion on voice analog signals through an ADC circuit, can realize the extraction of corresponding audio signals through an extraction circuit, then generates extraction analog signals to be transmitted to the ADC circuit, and the ADC circuit carries out analog-to-digital conversion on the extraction analog signals to generate extraction digital signals to be transmitted to a voice processor, can realize noise reduction and echo cancellation processing of the corresponding audio signals through the voice processor to obtain a final local audio signal stream, and finally transmits the local audio signal stream to a computer through a USB interface. The utility model can collect the voice information of the user to carry out noise reduction and echo cancellation processing, improves the voice communication effect of the remote conference on the user line, is beneficial to improving the communication quality of the remote conference on the line, is independent of the computer, can be used as the peripheral equipment of the computer for portable use, and has strong applicability.
Description
Technical Field
The utility model belongs to the technical field of electronic circuits, and particularly relates to a voice noise reduction conference terminal.
Background
With the development of internet technology and the popularization of intelligent devices, the manner in which people hold meetings is gradually changed from a person gathering form at a designated place to an online teleconferencing form. The remote conference is to realize the aim of holding the conference across areas by using a modern communication means. To hold a teleconference, a communication line, a teleconferencing system, and in some cases, a professional service to assist in achieving a better teleconference effect are often required. Teleconferencing is mainly embodied as audio conferences and video conferences, which require on-line interaction of audio. When the existing user terminal performs online teleconference, the problems of noise, echo and the like generally exist in the emitted user voice, the listening is interfered, and the voice interaction quality is affected.
Disclosure of utility model
The utility model aims to provide a voice noise reduction conference terminal which is used for solving the problems in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
The utility model provides a voice noise reduction conference terminal which comprises a pickup circuit, an ADC circuit, a voice processor, a stoping circuit and a USB interface, wherein the voice processor is respectively connected with the ADC circuit, the stoping circuit and the USB interface, the USB interface is used for establishing USB data butt joint with an external computer, the pickup circuit is used for collecting voice of a user and generating voice analog signals to be transmitted to the ADC circuit, the ADC circuit is used for receiving the voice analog signals of the pickup circuit to carry out analog-to-digital conversion, generating voice digital signals to be transmitted to the voice processor, the stoping analog signals of the stoping circuit are received to carry out analog-to-digital conversion to generate stoping digital signals to be transmitted to the voice processor, the voice processor is used for receiving the voice digital signals to carry out noise reduction processing, outputting human voice signals to the stoping circuit, receiving the stoping digital signals to carry out echo cancellation processing, outputting local audio signals to the USB interface, and the stoping circuit is used for receiving the human voice signals to carry out digital-to-analog conversion and audio amplification processing, generating stoping analog signals to be transmitted to the ADC circuit, and the USB interface is used for transmitting the local audio signals to the external computer.
When the method is applied, when a user needs to conduct an online teleconference, the terminal can be connected with a corresponding computer through a USB interface, voice information of the user can be collected through a pickup circuit, then a voice analog signal is generated and transmitted to an ADC circuit, analog-to-digital conversion can be conducted on the voice analog signal through the ADC circuit, a voice digital signal is generated and transmitted to a voice processor, extraction of the corresponding audio signal can be achieved through an extraction circuit, then an extraction analog signal is generated and transmitted to the ADC circuit, the ADC circuit conducts analog-to-digital conversion on the extraction analog signal to generate an extraction digital signal and transmits the extraction digital signal to the voice processor, noise reduction, human voice processing and echo elimination processing of the corresponding audio signal can be achieved through the voice processor, a final local audio signal stream is obtained, and finally the local audio signal stream is transmitted to the computer through the USB interface, and is interacted online by the computer. The utility model can collect the voice information of the user to carry out noise reduction and echo cancellation processing, improves the voice communication effect of the remote conference on the user line, is beneficial to improving the communication quality of the remote conference on the line, is independent of the computer, can be used as the peripheral equipment of the computer for portable use, and has strong applicability.
In one possible design, the extraction circuit includes a DAC circuit and an audio power amplifier circuit that are connected to each other, where the DAC circuit and the audio power amplifier circuit are used to perform digital-to-analog conversion and audio amplification processing on the human voice signal, respectively. When the voice signal processing circuit is applied, the DAC circuit can be used for carrying out digital-to-analog conversion on the voice signal processed by the voice processor, the obtained analog audio signal is transmitted to the audio power amplifier circuit, the audio power amplifier circuit is used for carrying out audio amplification processing on the analog audio signal, and the analog audio signal is fed back to the ADC circuit.
In one possible design, the stoping circuit further comprises a loudspeaker, and signal ends of the loudspeaker are respectively connected with the audio power amplifier circuit and the ADC circuit. When the loudspeaker is applied, the audio power amplifier circuit can transmit the extracted audio after the audio amplification treatment to the ADC circuit through the loudspeaker signal end, the extracted audio after the audio amplification treatment can be played through the loudspeaker, and the on-line audio received by the voice processor through the USB interface can also be subjected to digital-to-analog conversion and audio amplification treatment through the DAC circuit and the audio power amplifier circuit, and then played through the loudspeaker.
In one possible design, the DAC circuit uses an ES7148 digital-to-analog converter for digital-to-analog conversion, and the audio power amplifier circuit uses a CS5250 power amplifier chip for audio amplification.
In one possible design, the terminal further includes a controller, a key processor, a switch key and an indicator light, where the controller is connected with the key processor and the voice processor, respectively, and is configured to receive a switch control signal of the key processor and control an operating state of the voice processor, and the key processor is further connected with the switch key and the indicator light, and is configured to receive a switch control signal of the switch key, transmit the switch control signal to the controller, receive a status signal of the controller, and drive the indicator light to indicate a state of the controller. When the voice processor is applied, the working state of the voice processor can be controlled through the switch key, the key processor and the controller, and the state of the controller can be indicated by the indicator lamp driven by the key processor.
In one possible design, the controller employs an AT32F421C8T7 type single-chip microcomputer, and the key processor employs an HTR3236 driver.
In one possible design, the pickup circuit includes a dual channel pickup. When the voice communication method is applied, the voice collection of the two channels can be carried out on a user through the two-channel pick-up, the stereo processing is realized, the voice communication effect of the online teleconference can be improved, and the online teleconference call quality is improved.
In one possible design, the ADC circuit employs an ES7210 analog-to-digital converter and the speech processor employs a CSK4002 speech chip.
The beneficial effects are that: the utility model can collect the voice information of a user through the pickup circuit, then generate a voice analog signal to transmit to the ADC circuit, carry out analog-to-digital conversion on the voice analog signal through the ADC circuit, generate a voice digital signal to transmit to the voice processor, realize the stoping of the corresponding audio signal through the stoping circuit, then generate a stoping analog signal to transmit to the ADC circuit, carry out analog-to-digital conversion on the stoping analog signal by the ADC circuit to generate a stoping digital signal to transmit to the voice processor, realize the noise reduction, the human voice processing and the echo cancellation processing of the corresponding audio signal through the voice processor, obtain a final local audio signal stream, finally transmit the local audio signal stream to the computer through the USB interface, and carry out on-line interaction by the computer. The utility model can collect the voice information of the user to carry out noise reduction and echo cancellation processing, improves the voice communication effect of the remote conference on the user line, is beneficial to improving the communication quality of the remote conference on the line, is independent of the computer, can be used as the peripheral equipment of the computer for portable use, and has strong applicability.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of a terminal in an embodiment;
FIG. 2 is a schematic diagram of a pick-up circuit in an embodiment;
FIG. 3 is a schematic diagram of an ADC circuit according to an embodiment;
FIG. 4 is a schematic circuit diagram of a speech processor according to an embodiment;
FIG. 5 is a schematic circuit diagram of a USB interface according to an embodiment;
FIG. 6 is a schematic diagram of a DAC circuit in an embodiment;
FIG. 7 is a schematic diagram of an audio power amplifier circuit according to an embodiment;
FIG. 8 is a schematic circuit diagram of a switch key according to an embodiment;
FIG. 9 is a schematic circuit diagram of a key processor according to an embodiment;
FIG. 10 is a schematic circuit diagram of an indicator lamp in an embodiment;
FIG. 11 is a schematic circuit diagram of a controller according to an embodiment;
Fig. 12 is a circuit schematic diagram of a power module in an embodiment.
Detailed Description
It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model. Specific structural and functional details disclosed herein are merely representative of example embodiments of the utility model. This utility model may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be appreciated that the term "coupled" is to be interpreted broadly, and may be a fixed connection, a removable connection, or an integral connection, for example, unless explicitly stated and limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in the embodiments can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, specific details are provided to provide a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, a system may be shown in block diagrams in order to avoid obscuring the examples with unnecessary detail. In other embodiments, well-known processes, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.
Examples:
The embodiment provides a voice noise reduction conference terminal, as shown in fig. 1, including a pickup circuit, an ADC circuit, a voice processor, a stoping circuit and a USB interface, where the voice processor is connected with the ADC circuit, the stoping circuit and the USB interface, the USB interface is used to establish USB data docking with an external computer, the pickup circuit is used to collect user voice and generate a voice analog signal to transmit to the ADC circuit, the ADC circuit is used to receive the voice analog signal of the pickup circuit to perform analog-to-digital conversion, generate a voice digital signal to transmit to the voice processor, and receive the stoping analog signal of the stoping circuit to perform analog-to-digital conversion to generate a stoping digital signal to transmit to the voice processor, the voice processor is used to receive the voice digital signal to perform noise reduction processing, output a human voice signal to the stoping circuit, receive the stoping digital signal to perform echo cancellation processing, output a local audio signal to the USB interface, and the stoping circuit is used to receive the human voice signal to perform digital-analog conversion and audio amplification processing, generate a stoping analog signal to transmit to the ADC circuit, and the USB interface is used to transmit the local audio signal to the external computer.
When a user needs to conduct an online teleconference, the terminal can be connected with a corresponding computer through a USB interface, voice information of the user can be collected through the pickup circuit, then voice analog signals are generated and transmitted to the ADC circuit, analog-to-digital conversion can be conducted on the voice analog signals through the ADC circuit, voice digital signals are generated and transmitted to the voice processor, extraction of corresponding audio signals can be achieved through the extraction circuit, then extraction analog signals are generated and transmitted to the ADC circuit, the ADC circuit conducts analog-to-digital conversion on the extraction analog signals to generate extraction digital signals and transmits the extraction digital signals to the voice processor, noise reduction, human voice processing and echo elimination processing of the corresponding audio signals can be achieved through the voice processor, a final local audio signal stream is obtained, and finally the local audio signal stream is transmitted to the computer through the USB interface and is interacted online by the computer. The utility model can collect the voice information of the user to carry out noise reduction and echo cancellation processing, improves the voice communication effect of the remote conference on the user line, is beneficial to improving the communication quality of the remote conference on the line, is independent of the computer, can be used as the peripheral equipment of the computer for portable use, and has strong applicability.
As shown in fig. 2, the pickup circuit includes a dual channel pickup. During implementation, the two-channel sound pick-up can be used for carrying out two-channel voice collection on the user, stereophonic processing is achieved, the voice communication effect of the online teleconference of the user can be improved, and the online teleconference conversation quality is improved. The ADC circuit adopts an ES7210 analog-to-digital converter shown in FIG. 3, and the voice processor adopts a CSK4002 voice chip shown in FIG. 4. The USB interface adopts an USB Type-C interface as shown in FIG. 5.
Further, as shown in fig. 6 to 7, the extraction circuit includes a DAC circuit and an audio power amplifier circuit that are connected to each other, and the DAC circuit and the audio power amplifier circuit are respectively used for performing digital-to-analog conversion and audio amplification processing on the human voice signal. When the voice signal processing circuit is applied, the DAC circuit can be used for carrying out digital-to-analog conversion on the voice signal processed by the voice processor, the obtained analog audio signal is transmitted to the audio power amplifier circuit, the audio power amplifier circuit is used for carrying out audio amplification processing on the analog audio signal, and the analog audio signal is fed back to the ADC circuit. The stoping circuit also comprises a loudspeaker, and the signal end of the loudspeaker is respectively connected with the audio power amplifier circuit and the ADC circuit. In specific implementation, the audio power amplifier circuit can transmit the extracted audio after the audio amplification treatment to the ADC circuit through the loudspeaker signal end, the extracted audio after the audio amplification treatment can be played through the loudspeaker, and the on-line audio received by the voice processor through the USB interface can also be subjected to digital-to-analog conversion and audio amplification treatment through the DAC circuit and the audio power amplifier circuit, and then played through the loudspeaker. The DAC circuit adopts an ES7148 digital-to-analog converter to carry out digital-to-analog conversion, and the audio power amplifier circuit adopts a CS5250 power amplifier chip to carry out audio amplification treatment.
Further, as shown in fig. 8 to 11, the terminal further includes a controller, a key processor, a switch key and an indicator light, where the controller is connected with the key processor and the voice processor, respectively, and is used to receive a switch control signal of the key processor and control an operating state of the voice processor, and the key processor is further connected with the switch key and the indicator light, and is used to receive a switch control signal of the switch key, transmit the switch control signal to the controller, receive a status signal of the controller, and drive the indicator light to indicate a status of the controller. In the implementation process, the working state of the voice processor can be controlled through the switch key, the key processor and the controller, and the state of the controller can be indicated by the indication lamp driven by the key processor. The controller adopts an AT32F421C8T7 single-chip microcomputer, and the key processor adopts an HTR3236 driver.
Further, the terminal also includes a power module as shown in fig. 12, where the power module is a voltage conversion part inside the terminal, and the 5V power input through the USB interface is converted into 3.3V through a voltage stabilizing chip U1 of the power module to provide 3.3V voltage for internal devices of the terminal, and is converted into 1.1V through a voltage stabilizing chip U2 to provide core power for a voice chip CSK 4002.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The voice noise reduction conference terminal is characterized by comprising a pickup circuit, an ADC circuit, a voice processor, a stoping circuit and a USB interface, wherein the voice processor is respectively connected with the ADC circuit, the stoping circuit and the USB interface, the USB interface is used for establishing USB data docking with an external computer, the pickup circuit is used for collecting voice of a user and generating voice analog signals to be transmitted to the ADC circuit, the ADC circuit is used for receiving the voice analog signals of the pickup circuit to carry out analog-to-digital conversion and generating voice digital signals to be transmitted to the voice processor, the stoping analog signals of the stoping circuit are received to carry out analog-to-digital conversion and generating stoping digital signals to be transmitted to the voice processor, the voice processor is used for receiving the voice digital signals to carry out noise reduction processing and outputting human voice signals to the stoping circuit, the stoping digital signals are received to carry out echo cancellation processing and outputting local audio signals to the USB interface, the stoping circuit is used for receiving the human voice signals to carry out digital-to-analog conversion and audio amplification processing and generating stoping analog signals to be transmitted to the ADC circuit, and the USB interface is used for transmitting the local audio signals to the external computer.
2. The voice noise reduction conference terminal according to claim 1, wherein the extraction circuit comprises a DAC circuit and an audio power amplifier circuit which are connected with each other, and the DAC circuit and the audio power amplifier circuit are respectively used for performing digital-to-analog conversion and audio amplification processing on the human voice signal.
3. The voice noise reduction conference terminal according to claim 2, wherein the stoping circuit further comprises a loudspeaker, and signal ends of the loudspeaker are respectively connected with the audio power amplifier circuit and the ADC circuit.
4. The voice noise reduction conference terminal according to claim 2, wherein the DAC circuit performs digital-to-analog conversion using an ES7148 digital-to-analog converter, and the audio power amplifier circuit performs audio amplification using a CS5250 power amplifier chip.
5. The voice noise reduction conference terminal according to claim 1, further comprising a controller, a key processor, a switch key and an indicator light, wherein the controller is connected with the key processor and the voice processor respectively, and is used for receiving a switch control signal of the key processor and controlling an operating state of the voice processor, and the key processor is further connected with the switch key and the indicator light, is used for receiving a switch control signal of the switch key, transmitting the switch control signal to the controller, receiving a state signal of the controller, and driving the indicator light to indicate a state of the controller.
6. The voice noise reduction conference terminal according to claim 5, wherein said controller employs an AT32F421C8T7 type single-chip microcomputer, and said key processor employs an HTR3236 driver.
7. The voice noise reduction conference terminal of claim 1, wherein the pickup circuitry comprises a dual channel pickup.
8. The voice noise reduction conference terminal of claim 1, wherein the ADC circuit employs an ES7210 analog-to-digital converter and the voice processor employs a CSK4002 voice chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322457355.0U CN220830535U (en) | 2023-09-08 | 2023-09-08 | Conference terminal with voice noise reduction function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322457355.0U CN220830535U (en) | 2023-09-08 | 2023-09-08 | Conference terminal with voice noise reduction function |
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| CN220830535U true CN220830535U (en) | 2024-04-23 |
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| CN202322457355.0U Active CN220830535U (en) | 2023-09-08 | 2023-09-08 | Conference terminal with voice noise reduction function |
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| CN (1) | CN220830535U (en) |
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- 2023-09-08 CN CN202322457355.0U patent/CN220830535U/en active Active
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