CN111901726B - Automatic silent sound preamplifier system and control method thereof - Google Patents

Automatic silent sound preamplifier system and control method thereof Download PDF

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Publication number
CN111901726B
CN111901726B CN202010745258.XA CN202010745258A CN111901726B CN 111901726 B CN111901726 B CN 111901726B CN 202010745258 A CN202010745258 A CN 202010745258A CN 111901726 B CN111901726 B CN 111901726B
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input
signal
module
adder
silent
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CN111901726A (en
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郭远林
谢岸海
王恒
李春华
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Guangzhou DSPPA Audio Co Ltd
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Guangzhou DSPPA Audio Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The embodiment of the invention provides an automatic silent sound preamplifier system and a control method thereof. The system comprises computer equipment, an MCU control module, an input module, a volume control module, an adder module, a silent sound circuit module, a high-low sound control module and an audio signal output module; the adder module comprises a first adder, a second adder and a third adder; the silent sound circuit module comprises a first silent sound circuit and a second silent sound circuit; the input module comprises a line input, an MIC input and an EMC input; the computer equipment is used for sending a control signal to the MCU control module; the MCU control module is used for sending control signals to the volume control module and the high and low tone control module; and the input module is used for sending the line input signal input by the line and the MIC input signal input by the MIC to the volume control module and sending the EMC input signal input by the EMC to the first silent circuit. Simple control of each input channel is realized, and operability of cascade control of different pre-amplifiers is enhanced.

Description

Automatic silent sound preamplifier system and control method thereof
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of electronic equipment, in particular to an automatic silent preamplifier system and a control method thereof.
[ background of the invention ]
The preamplifier is a circuit or an electronic device placed between the signal source and the amplifier stage, designed to receive a weak voltage signal from the signal source, and its main role is to compensate the tolerances of the speaker unit and the ANC microphone, which is one of the main components that introduce noise.
The preamplifier with wide application range at present has 12 audio input ports, controls equipment through an RS485 communication protocol, and independently controls the volume and high and low tones of each input channel when the equipment is controlled through an RS845 communication protocol. The control operation of each input channel is complicated and difficult to control, and the singlechip is needed to modify the machine number during cascade control, so that the operability is weak.
[ summary of the invention ]
In view of this, the embodiment of the present invention provides an automatic silent preamplifier system and a control method thereof, so as to implement simple control on each input channel and enhance the operability of cascade control of different pre-amplifiers.
In one aspect, an embodiment of the present invention provides an automatic silent preamplifier system, including:
the device comprises computer equipment, an MCU control module, an input module, a volume control module, an adder module, a silent sound circuit module, a high and low sound control module and an audio signal output module;
the adder module comprises a first adder, a second adder and a third adder;
the silent sound circuit module comprises a first silent sound circuit and a second silent sound circuit;
the input module comprises a line input, an MIC input and an EMC input;
the computer equipment is used for sending a control signal to the MCU control module;
the MCU control module is used for sending control signals to the volume control module and the high and low tone control module;
and the input module is used for sending the line input signal input by the line and the MIC input signal input by the MIC to the volume control module and sending the EMC input signal input by the EMC to the first silent circuit.
The volume control module is used for adjusting the volume of the line input signal and the MIC input signal, sending the adjusted line input signal and the adjusted MIC input signal to the first adder module and sending the adjusted MIC input signal to the second silent sound circuit;
the first adder is used for mixing the adjusted input signals to generate a first mixed signal and sending the first mixed signal to the second adder;
the first silent sound circuit is used for carrying out silent sound regulation on the EMC input signal and sending the regulated first silent sound signal to the second adder;
the second adder is used for mixing the first mixed signal and the regulated silent signal to generate a second mixed signal and sending the second mixed signal to a third adder;
the second silent sound circuit is used for carrying out silent sound pitch on the MIC input signal and sending the adjusted second silent sound signal to a third adder;
the third adder is used for mixing the second mixed signal and the adjusted second silent signal to generate a third mixed signal and sending the third mixed signal to the high-low sound control module;
and the high and low tone control module is used for adjusting the high and low tones of the third mixed signal and sending the adjusted third mixed signal to the audio signal output module.
Optionally, the method further comprises: a first signal transmission module;
the first signal transmission module is used for converting the network control signal output by the computer equipment into an SPI signal and sending the SPI signal to the MCU control module;
the first signal transmission module comprises an RJ45 information socket, an RTL8309 switch chip and a W5500 network chip.
Optionally, a control panel is further included;
the control panel is used for sending a control signal to the MCU control module and displaying a control result;
the control panel comprises an LCD display device and a key control device.
Optionally, the line inputs include line input 1, line input 2, line input 3, line input 4, and line input 5.
Optionally, the MIC inputs include MIC input 1, MIC input 2, MIC input 3, MIC input 4, MIC input 5.
Optionally, the volume control module sends the adjusted input signals of the line input 1, the line input 2, the line input 3, the line input 4, and the line input 5 and the input signals of the MIC input 2, the MIC input 3, the MIC input 4, and the MIC input 5 to the first adder module, and sends the adjusted input signal of the MIC input 1 to the second silent sound circuit.
Optionally, the EMC inputs comprise EMC input 1, EMC input 2.
Optionally, the computer device is connected to the second preamplifier through the second signal transmission module.
In another aspect, an embodiment of the present invention provides an automatic silent preamplifier method, including:
the first preamplifier sends a signaling to the computer equipment through a first signal transmission module;
the computer equipment receives the signaling and sets a first label for the first preamplifier;
the second preamplifier sends a signaling to the computer equipment through a second signal transmission module;
the computer equipment receives the signaling and sets a second label for the second-stage amplifier;
the computer device classifies the tags and sends different control signals according to the categories.
Optionally, if the first tag and the second tag are of the same class, the computer device sends the same control signal to the first preamplifier and the second preamplifier.
In the technical scheme of the automatic silent preamplifier system and the control method thereof provided by the embodiment of the invention, computer equipment sends a control signal to an MCU control module, the MCU control module sends the control signal to a volume control module and a high-low tone control module, the input module sends an MIC input signal to the volume control module and sends an EMC input signal to a first silent circuit, the volume control module carries out volume adjustment on the received signal, sends the adjusted line input signal and the MIC input signal to a first adder module and sends the adjusted MIC input signal to a second silent circuit, the first adder module mixes the adjusted input signals to generate a first mixed signal and sends the first mixed signal to a second adder, the first silent circuit carries out silent adjustment on the EMC input signal and sends the adjusted first silent signal to the second adder, the second adder mixes the first mixed signal and the adjusted silent signal to generate a second mixed signal, the second mixed signal is sent to the third adder, the third adder mixes the second mixed signal and the adjusted second silent signal to generate a third mixed signal, the third mixed signal is sent to the high-bass control module, the high-bass control module carries out high-bass adjustment on the third mixed signal, and the adjusted third mixed signal is sent to the audio signal output module, so that simple control on each input channel is realized, and the operability of cascade control of different preamplifier amplifiers is enhanced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an automatic silent preamplifier system according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling an automatic silent preamplifier according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 1 is a schematic structural diagram of an automatic silent preamplifier system according to an embodiment of the present invention, as shown in fig. 1, the system includes:
the system comprises a computer device 11, an MCU (micro controller Unit (MCU) control module, an input module, a volume control module 13, an adder module, a silent sound circuit module, a high and low sound control module 14 and an audio signal output module 12;
the adder module comprises a first adder 16, a second adder 17 and a third adder 18;
the silent sound circuit module comprises a first silent sound circuit 19 and a second silent sound circuit;
the input module comprises line input, MIC microphone (MIC for short) input and EMC input;
the computer device 11 is used for sending a control signal to the MCU control module 12;
the MCU control module 12 is configured to send control signals to the volume control module 13 and the high and low sound control module 14;
and an input module for transmitting the line input signal of the line input and the MIC input signal of the MIC input to the volume control module 13 and transmitting the EMC input signal of the EMC input to the first mute circuit 19.
The volume control module 13 is used for adjusting the volume of the line input signal and the MIC input signal, sending the adjusted line input signal and the MIC input signal to the first adder 16 module and sending the adjusted MIC input signal to the second silent circuit;
a first adder 16, configured to mix the adjusted input signals to generate a first mixed signal, and send the first mixed signal to a second adder 17;
the first silent sound circuit 19 is used for performing silent sound adjustment on the EMC input signal and sending the adjusted first silent sound signal to the second adder 17;
a second adder 17, configured to mix the first mixed signal and the adjusted silence signal to generate a second mixed signal, and send the second mixed signal to a third adder 18;
the second silent sound circuit is used for carrying out silent sound pitch on the MIC input signal and sending the adjusted second silent sound signal to the third adder 18;
a third adder 18, configured to mix the second mixed signal and the adjusted second mute signal to generate a third mixed signal, and send the third mixed signal to the high-low sound control module 14;
and the high-low tone control module 14 is configured to perform high-low tone adjustment on the third mixed signal, and send the adjusted third mixed signal to the audio signal output module 12.
As an alternative, the MCU control module 12 comprises an STM32 single chip microcomputer.
As an alternative, the volume control module 13 comprises a PT2258 microprocessor.
Alternatively, the bass control module 14 includes a PT2313 microprocessor.
In the embodiment of the present invention, the system further includes: a first signal transmission module;
a first signal transmission module, configured to convert a network control signal output by the computer device 11 into an SPI (Serial Peripheral Interface, abbreviated as SPI) signal, and send the SPI signal to the MCU control module 12;
the first signal transmission module comprises an RJ45 information socket 21, an RTL8309 switch chip 22 and a W5500 network chip 23.
In the embodiment of the present invention, the RJ45 information socket 21 is used to connect the computer device 11 and the RTL8309 switch chip 22.
In this embodiment of the present invention, the RTL8309 switch chip 22 is used to convert the network signal sent by the computer device 11 into an electrical signal.
In the embodiment of the invention, the W5500 network chip 23 is used for connecting the RTL8309 switch chip 22 and the MCU control module 12.
In the embodiment of the invention, the system also comprises a control panel;
the control panel is used for sending a control signal to the MCU control module 12 and displaying a control result;
the control panel includes an LCD display device 24, a key control device 25.
In the embodiment of the present invention, the LCD display device 24 is configured to receive and display the control result sent by the MCU control module 12.
In the embodiment of the present invention, the key control device 25 is configured to send a control signal to the MCU control module 12 through key control.
In the embodiment of the invention, the MIC input comprises MIC input 1, MIC input 2, MIC input 3, MIC input 4 and MIC input 5.
In the embodiment of the invention, the volume control module 13 sends the input signals of the adjusted line input 1, line input 2, line input 3, line input 4 and line input 5 and the input signals of the MIC input 2, MIC input 3, MIC input 4 and MIC input 5 to the first adder 16 module, and sends the input signal of the adjusted MIC input 1 to the second silent sound circuit, so that the unified control of each input channel is realized, and the control is simpler.
In an embodiment of the invention, the EMC inputs comprise EMC input 1, EMC input 2.
In the embodiment of the present invention, the computer device 11 is connected to the second preamplifier through the second signal transmission module.
As an alternative, the first signal transmission module and the second signal transmission module have the same structure, and the first preamplifier and the second preamplifier have the same structure.
As an alternative, the computer device 11 may also be connected to a third preamplifier via a third signal transmission module.
In the embodiment of the present invention, the number of the signal transmission modules and the number of the pre-stage amplifiers are not limited.
In the automatic silent preamplifier system provided by the embodiment of the invention, computer equipment sends a control signal to an MCU control module, the MCU control module sends the control signal to a volume control module and a high-low tone control module, the input module sends an MIC input signal to the volume control module and sends an EMC input signal to a first silent circuit, the volume control module carries out volume adjustment on the received signal, sends the adjusted line input signal and the MIC input signal to a first adder module and sends the adjusted MIC input signal to a second silent circuit, the first adder module mixes the adjusted input signals to generate a first mixed signal and sends the first mixed signal to a second adder, the first silent circuit carries out silent adjustment on the EMC input signal and sends the adjusted first silent signal to the second adder, the second adder mixes the first mixed signal and the adjusted silent signal to generate a second mixed signal, the second mixed signal is sent to the third adder, the third adder mixes the second mixed signal and the adjusted second silent signal to generate a third mixed signal, the third mixed signal is sent to the high-bass control module, the high-bass control module carries out high-bass adjustment on the third mixed signal, and the adjusted third mixed signal is sent to the audio signal output module, so that simple control on each input channel is realized, and the operability of cascade control of different preamplifier amplifiers is enhanced.
Fig. 2 is a flowchart of a method for controlling an automatic silent preamplifier according to an embodiment of the present invention, as shown in fig. 2, the method includes:
step 101, the first preamplifier sends a signaling to the computer device through the first signal transmission module.
Step 102, the computer device receives the signaling and sets a first label to the first preamplifier.
And step 103, the second preamplifier of the second preamplifier sends a signaling to the computer equipment through the second signal transmission module.
Step 104, the computer device receives the signaling and sets a second label to the second stage amplifier.
And 105, classifying the labels by the computer equipment, and sending different control signals according to the classes.
As an alternative, the computer device may receive a third preamplifier, send signaling to the computer device via the third signal transmission module and set a third label to the third preamplifier.
In the embodiment of the invention, the computer equipment can classify different labels differently and send different control signals according to the classification, thereby realizing the enhancement of the operability of cascade control of different front stage amplifiers.
In the automatic silent preamplifier system provided by the embodiment of the invention, computer equipment sends a control signal to an MCU control module, the MCU control module sends the control signal to a volume control module and a high-low tone control module, the input module sends an MIC input signal to the volume control module and sends an EMC input signal to a first silent circuit, the volume control module carries out volume adjustment on the received signal, sends the adjusted line input signal and the MIC input signal to a first adder module and sends the adjusted MIC input signal to a second silent circuit, the first adder module mixes the adjusted input signals to generate a first mixed signal and sends the first mixed signal to a second adder, the first silent circuit carries out silent adjustment on the EMC input signal and sends the adjusted first silent signal to the second adder, the second adder mixes the first mixed signal and the adjusted silent signal to generate a second mixed signal, the second mixed signal is sent to the third adder, the third adder mixes the second mixed signal and the adjusted second silent signal to generate a third mixed signal, the third mixed signal is sent to the high-bass control module, the high-bass control module carries out high-bass adjustment on the third mixed signal, and the adjusted third mixed signal is sent to the audio signal output module, so that simple control on each input channel is realized, and the operability of cascade control of different preamplifier amplifiers is enhanced.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. An automatic silent preamplifier system, comprising: the device comprises computer equipment, an MCU control module, an input module, a volume control module, an adder module, a silent sound circuit module, a high and low sound control module and an audio signal output module;
the adder module comprises a first adder, a second adder and a third adder;
the silent sound circuit module comprises a first silent sound circuit and a second silent sound circuit;
the input module comprises a line input, an MIC input and an EMC input;
the computer equipment is used for sending a control signal to the MCU control module;
the MCU control module is used for sending control signals to the volume control module and the high and low tone control module;
the input module is used for sending a line input signal input by a line and an MIC input signal input by an MIC to the volume control module and sending an EMC input signal input by an EMC to the first silent circuit;
the volume control module is used for adjusting the volume of the line input signal and the MIC input signal, sending the adjusted line input signal and the adjusted MIC input signal to the first adder and sending the adjusted MIC input signal to the second silent sound circuit;
the first adder is used for mixing the adjusted input signals to generate a first mixed signal and sending the first mixed signal to the second adder;
the first silent sound circuit is used for carrying out silent sound regulation on the EMC input signal and sending the regulated first silent sound signal to the second adder;
the second adder is used for mixing the first mixed signal and the regulated silent signal to generate a second mixed signal and sending the second mixed signal to a third adder;
the second silent sound circuit is used for carrying out silent sound pitch on the MIC input signal and sending the adjusted second silent sound signal to a third adder;
the third adder is used for mixing the second mixed signal and the adjusted second silent signal to generate a third mixed signal and sending the third mixed signal to the high-low sound control module;
and the high and low tone control module is used for adjusting the high and low tones of the third mixed signal and sending the adjusted third mixed signal to the audio signal output module.
2. The system of claim 1, further comprising: a first signal transmission module; the first signal transmission module is used for converting the network control signal output by the computer equipment into an SPI signal and sending the SPI signal to the MCU control module;
the first signal transmission module comprises an RJ45 information socket, an RTL8309 switch chip and a W5500 network chip.
3. The system of claim 1, further comprising a control panel;
the control panel is used for sending a control signal to the MCU control module and displaying a control result;
the control panel comprises an LCD display device and a key control device.
4. The system of claim 1, wherein the line inputs comprise line input 1, line input 2, line input 3, line input 4, and line input 5.
5. The system of claim 1, wherein the MIC inputs comprise MIC input 1, MIC input 2, MIC input 3, MIC input 4, MIC input 5.
6. The system of claim 4, wherein the volume control module sends the adjusted input signals of line input 1, line input 2, line input 3, line input 4, and line input 5 and the input signals of MIC input 2, MIC input 3, MIC input 4, and MIC input 5 to the first summer and the adjusted input signal of the MIC input 1 to the second silent sound circuit.
7. The system of claim 1, wherein the EMC inputs comprise EMC input 1, EMC input 2.
8. The system of claim 1, wherein the computer device is connected to a second preamplifier through a second signal transmission module.
9. A control method of an automatic silent preamplifier is characterized by comprising the following steps:
the first preamplifier sends a signaling to the computer equipment through a first signal transmission module;
the computer equipment receives the signaling and sets a first label for the first preamplifier;
the second preamplifier sends a signaling to the computer equipment through a second signal transmission module;
the computer equipment receives the signaling and sets a second label for the second-stage amplifier;
the computer equipment classifies the first label and the second label and sends different control signals according to the classification;
the first preamplifier includes: the device comprises an MCU control module, an input module, a volume control module, an adder module, a silent sound circuit module, a high and low sound control module and an audio signal output module;
the adder module comprises a first adder, a second adder and a third adder;
the silent sound circuit module comprises a first silent sound circuit and a second silent sound circuit;
the input module comprises a line input, an MIC input and an EMC input;
the MCU control module sends control signals to the volume control module and the high and low tone control module;
the input module sends a line input signal input by a line and an MIC input signal input by an MIC to the volume control module and sends an EMC input signal input by an EMC to the first silent circuit;
the volume control module is used for adjusting the volume of the line input signal and the MIC input signal, sending the adjusted line input signal and the adjusted MIC input signal to the first adder and sending the adjusted MIC input signal to the second silent sound circuit;
the first adder mixes the adjusted input signals to generate a first mixed signal and sends the first mixed signal to a second adder;
the first silent circuit carries out silent adjustment on the EMC input signal and sends the adjusted first silent signal to the second adder;
the second adder mixes the first mixed signal and the adjusted silence signal to generate a second mixed signal, and sends the second mixed signal to a third adder;
the second silent sound circuit carries out silent sound pitch on the MIC input signal and sends the adjusted second silent sound signal to a third adder;
the third adder mixes the second mixed signal and the adjusted second silent signal to generate a third mixed signal, and sends the third mixed signal to the high-low sound control module;
and the high-low tone control module is used for adjusting the high-low tone of the third mixed signal and sending the adjusted third mixed signal to the audio signal output module.
10. The method of claim 9, wherein the computer device sends the same control signal to the first preamplifier and the second preamplifier if the first tag and the second tag are of the same class.
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