CN109119053B - Signal transmission method and device, electronic equipment and computer readable storage medium - Google Patents
Signal transmission method and device, electronic equipment and computer readable storage medium Download PDFInfo
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- G10—MUSICAL INSTRUMENTS; ACOUSTICS
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- G10H1/00—Details of electrophonic musical instruments
- G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments
- G10H1/0041—Recording/reproducing or transmission of music for electrophonic musical instruments in coded form
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- G10H1/0066—Transmission between separate instruments or between individual components of a musical system using a MIDI interface
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Abstract
The embodiment of the invention discloses a signal transmission method, a signal transmission device, electronic equipment and a computer readable storage medium, belongs to the field of data transmission, and can enable information transmission between intelligent equipment and MIDI equipment to be more convenient. The signal transmission method modulates the MIDI signal from the first equipment into a preset audio carrier to form a first audio signal; transmitting the first audio signal to a second device over an audio connection line; or, receiving a second audio signal from a second device through the audio connection line; and demodulating the second audio signal to obtain a MIDI signal. The device, the electronic equipment and the computer readable storage medium have corresponding modules for realizing the method. The invention is suitable for signal transmission between the intelligent device and the MIDI device.
Description
Technical Field
The present invention relates to the field of data transmission, and in particular, to a signal transmission method, an apparatus, an electronic device, and a computer-readable storage medium.
Background
The digital signal processing is to process the signal in a numerical calculation mode, and aims to measure or filter a real-world continuous analog signal. In the digital signal processing technology, the frequency of regular sound waves with voice, music and sound effects is converted into digital and analog signals to be heard by the public. Obviously, the advantages and disadvantages of the signal processing technology are outstanding, and the advantages are that the operation speed is high, the programmable characteristic and the flexible interface are provided, and the signal processing technology is very suitable for being applied to the development of electronic products. The processing between the audio signals is completed only by an external audio signal processor, which increases the burden for the transmission of information between intelligent devices which seek mobile flexibility.
Disclosure of Invention
In view of this, embodiments of the present invention provide a signal transmission method, apparatus, electronic device and computer readable storage medium, which facilitate information transmission between an intelligent device and a MIDI device.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a signal transmission method: modulating a MIDI signal from a first device into a preset audio carrier to form a first audio signal; transmitting the first audio signal to a second device over an audio connection line; or, receiving a second audio signal from a second device through the audio connection line; and demodulating the second audio signal to obtain a MIDI signal.
With reference to the first aspect, in a first implementation manner of the first aspect, the first device is a MIDI device, and the second device is an intelligent device; the modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises: converting a MIDI signal generated by MIDI equipment into the first audio signal through a preset AMC chip; the sending the first audio signal to a second device over an audio connection line comprises: transmitting the first audio signal to the second device through a microphone signal line connected between the first device and the second device.
With reference to the first aspect, in a second implementation manner of the first aspect, the first device is a MIDI device, and the second device is an intelligent device; the receiving a second audio signal from a second device over an audio connection line comprises: receiving a second audio signal from the second device through a headphone signal line connected between the first device and the second device; the demodulating the second audio signal to obtain a MIDI signal comprises: and converting the received second audio signal into an MIDI signal through a preset AMC chip.
With reference to the first aspect, in a third implementation manner of the first aspect, the first device is an intelligent device, and the second device is a MIDI device; the modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises: converting a MIDI signal from a first device into the first audio signal through preset software; the sending the first audio signal to a second device over an audio connection line comprises: transmitting the first audio signal to the second device through an earphone signal line connected between the first device and the second device.
With reference to the first aspect, in a fourth implementation manner of the first aspect, the first device is an intelligent device, and the second device is a MIDI device; the receiving a second audio signal from a second device over an audio connection line comprises: receiving a second audio signal from the second device through a microphone signal line connected between the first device and the second device; the demodulating the second audio signal to obtain a MIDI signal comprises: and converting the received second audio signal into a MIDI signal through preset software.
With reference to the first aspect or any one of the first to fourth implementation manners of the first aspect, in a fifth implementation manner of the first aspect, the modulating the MIDI signal from the first device into the preset audio carrier includes modulating the MIDI signal from the first device into the preset audio carrier by at least one of the following modulation manners: frequency modulation, amplitude modulation, phase modulation.
With reference to the fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect, the adopted modulation manner includes the frequency modulation; said modulating the MIDI signal from the first device into the preset audio carrier comprises: encoding the MIDI signal in a binary mode, wherein each byte has 8 bits, and each bit is a digital '0' or a digital '1'; modulating the preset audio carrier wave into a first frequency by using a digital '0' in the MIDI signal, and modulating the preset audio carrier wave into a second frequency by using a digital '1' in the MIDI signal, wherein the first frequency is different from the second frequency.
In a second aspect, the present invention provides a signal transmission apparatus, comprising: the modulation unit is used for modulating the MIDI signal from the first equipment into a preset audio carrier to form a first audio signal; a transmitting unit, configured to transmit the first audio signal to a second device through an audio connection line; a receiving unit for receiving a second audio signal from a second device through an audio connection line; and the demodulation unit is used for demodulating the second audio signal to obtain a MIDI signal.
With reference to the second aspect, in a first implementation manner of the second aspect, the modulation unit is specifically configured to modulate the MIDI signal from the first device into the preset audio carrier by at least one of the following modulation manners: frequency modulation, amplitude modulation, phase modulation.
With reference to the first implementation manner of the second aspect, in a second implementation manner of the second aspect, the adopted modulation manner includes the frequency modulation; the modulation unit includes: the coding module is used for coding the MIDI signal in a binary mode, each byte has 8 bits, and each bit is a digital '0' or a digital '1'; and the modulation module is used for modulating the preset audio carrier wave into a first frequency by using a digital '0' in the MIDI signal and modulating the preset audio carrier wave into a second frequency by using a digital '1' in the MIDI signal, wherein the first frequency is different from the second frequency.
In a third aspect, the present invention provides an electronic device, comprising: the device comprises a shell, a processor, a memory, a circuit board and a power circuit, wherein the circuit board is arranged in a space enclosed by the shell, and the processor and the memory are arranged on the circuit board; a power supply circuit for supplying power to each circuit or device of the electronic apparatus; the memory is used for storing executable program codes; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for executing any one of the aforementioned signal transmission methods.
In a fourth aspect, the present invention provides a computer-readable storage medium storing one or more programs, which are executable by one or more processors to implement any of the signal transmission methods provided by the embodiments of the present invention.
In the signal transmission method provided by the embodiment of the present invention, a MIDI signal from a first device is modulated into a preset audio carrier to form a first audio signal; transmitting the first audio signal to a second device over an audio connection line; or, receiving a second audio signal from a second device through the audio connection line; and demodulating the second audio signal to obtain a MIDI signal. The invention uses one audio connecting line as transmission carrier through digital signal processing technique, which makes the information transmission between intelligent device and MIDI device more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a signal transmission method according to a first embodiment of the present invention;
FIG. 2 is a diagram illustrating a second embodiment of a signal transmission method according to the present invention;
fig. 3 is a schematic diagram of a combination of signal transmission methods according to the first and second embodiments of the present invention;
FIG. 4 is a diagram illustrating a frequency modulation method according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a signal transmission device according to the present invention;
FIG. 6 is a schematic diagram of a modulation unit according to the present invention;
fig. 7 is a schematic structural diagram of an embodiment of an electronic device according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below 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.
Example one
As shown in fig. 1, an embodiment of a signal transmission method according to the present invention includes:
MIDI, the abbreviation for Musical Instrument Digital Interface, is a communications standard only, established by manufacturers of electronic Musical instruments, to determine the way in which computer music programs, synthesizers, and other electronic sound equipment exchange information and control signals with each other.
The MIDI signals are digital interface information of musical instruments, and represent various information of musical instruments (such as various control information of pitches, strength, pedals, and the like) into standard digital information, i.e., MIDI information, so as to facilitate communication between the electroacoustic musical instruments and computers.
Modulation is a process of applying a baseband signal (modulation signal) to be transmitted to a high-frequency oscillation signal, and is a process of transferring the baseband signal to a high-frequency carrier, that is, a process of shifting a frequency spectrum, in order to convert an analog signal or a digital signal to be transmitted into a high-frequency signal suitable for channel transmission. In this embodiment, the MIDI signal is moved to the audio carrier as the baseband signal to form the first audio signal for transmission in the audio channel.
Optionally, in order to convert the MIDI signal into the audio signal, the modulating the MIDI signal from the first device into the preset audio carrier includes modulating the MIDI signal from the first device into the preset audio carrier by using at least one of the following modulation methods: frequency modulation, amplitude modulation, phase modulation.
As an alternative, as shown in fig. 4, the adopted modulation method includes the frequency modulation; said modulating the MIDI signal from the first device into the preset audio carrier b comprises: encoding the MIDI signal in a binary manner, each byte has 8 bits, each bit is a digital "0" or a digital "1" (at this time, the MIDI signal is encoded into a binary baseband signal, as shown in FIG. 4 a); modulating the preset audio carrier b to a first frequency by using a digital '0' in the MIDI signal, and modulating the preset audio carrier b to a second frequency by using a digital '1' in the MIDI signal, wherein the first frequency is different from the second frequency (as shown in c in fig. 4).
Optionally, the frequency range of the preset audio carrier is: 0-44.1 kHz.
And 102, sending the first audio signal to a second device through an audio connecting line.
As shown in fig. 3, in a first implementation manner of this embodiment, the first device is a MIDI device 1, the second device is a smart device 2 (such as an iPhone, an Android smartphone, a tablet pc, etc.), a 3.25mm audio connection line (not limited to the 3.25mm audio connection line, and the model of the audio connection line can be changed according to the requirement in practical application) is used as a transmission carrier, one end of the transmission carrier is connected to the smart device 2, and the other end of the transmission carrier is connected to the MIDI device 1 through an AMC chip 5. The modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises: the MIDI signal generated by the MIDI equipment 1 is converted into the first audio signal through a preset AMC chip 5; the sending the first audio signal to a second device over an audio connection line comprises: the first audio signal is transmitted to the second device via a microphone signal line 3 connected between the first device and the second device. In this embodiment, an audio connection line is used as a transmission carrier through a digital signal processing technology, which brings convenience to the MIDI device 1 to transmit information to the intelligent device 2, and makes audio signal transmission more concise and convenient.
Alternatively, the AMC chip 5 may be integrated with the audio connection or integrated on the MIDI device 1, the AMC chip 5 having a modulation algorithm that modulates the MIDI signal into the first audio signal.
As shown in fig. 3, in a second implementation manner of this embodiment, the first device is a smart device 2 (such as an iPhone, an Android smart phone, a tablet computer, etc.); the second device is a MIDI device 1, and uses a 3.25mm audio connection line (not limited to the 3.25mm audio connection line, and the type of the audio connection line can be changed according to the requirements in practical application) as a transmission carrier, one end of which is connected to the smart device 2, and the other end of which is connected to the MIDI device 1. The modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises: the MIDI signal from the first device is converted into the first audio signal through preset software. The sending the first audio signal to a second device over an audio connection line comprises: the first audio signal is transmitted to the second device via an earphone signal line 4 connected between the first device and the second device. In this embodiment, an audio connection line is used as a transmission carrier through a digital signal processing technology, which facilitates the transmission of information from the intelligent device 2 to the MIDI device 1, and makes the transmission of audio signals more concise and convenient.
Optionally, the preset software is software installed on the intelligent device 2, and the preset software has a modulation algorithm for modulating the MIDI signal into the audio signal.
Example two
As shown in fig. 2, an embodiment of a signal transmission method according to the present invention includes:
In this embodiment, in order to enable MIDI device 1 to receive the signal from intelligent device 2, the second audio signal is demodulated into a MIDI signal for recognition by MIDI device 1; the second audio signal demodulation process is an inverse operation process of modulating the MIDI signal from the first device to a preset audio carrier in step 101 to form the first audio signal.
As shown in fig. 3, in a first implementation manner of this embodiment, the first device is a MIDI device 1, the second device is a smart device 2 (such as an iPhone, an Android smartphone, a tablet computer, etc.), a 3.25mm audio cable (not limited to the 3.25mm audio cable, and the model of the audio cable can be changed according to the requirement in practical application) is used as a transmission carrier, one end of the audio cable is connected to the smart device 2, and the other end of the audio cable is connected to the MIDI device 1; the receiving a second audio signal from a second device over an audio connection line comprises: a second audio signal from the second device is received via a headphone signal line 4 connected between the first device and the second device. The demodulating the second audio signal to obtain a MIDI signal comprises: and converting the received second audio signal into a MIDI signal through preset software. In this embodiment, an audio connection line is used as a transmission carrier through a digital signal processing technology, which facilitates the transmission of information from the intelligent device 2 to the MIDI device 1, and makes the transmission of audio signals more concise and convenient.
Optionally, the preset software is software installed on the intelligent device 2, and the preset software has a demodulation algorithm for demodulating the audio signal into the MIDI signal.
As shown in fig. 3, in a second implementation manner of this embodiment, the first device is a smart device 2 (such as an iPhone, an Android smartphone, a tablet computer, etc.), the second device is a MIDI device 1, and one end of the MIDI device 1 is connected to the smart device 2, and the other end of the MIDI device 1 is connected to an AMC chip 5 by using a 3.25mm audio connection line (not limited to the 3.25mm audio connection line, and the model of the audio connection line can be changed according to the requirement in practical application) as a transmission carrier; the receiving a second audio signal from a second device over an audio connection line comprises: the receiving a second audio signal from a second device over an audio connection line comprises: a second audio signal from the second device is received via a microphone signal line 3 connected between the first device and the second device. The demodulating the second audio signal to obtain a MIDI signal comprises: and converting the received second audio signal into a MIDI signal through a preset AMC chip 5. In this embodiment, an audio connection line is used as a transmission carrier through a digital signal processing technology, which brings convenience to the MIDI device 1 to transmit information to the intelligent device 2, and makes audio signal transmission more concise and convenient.
Alternatively, the AMC chip 5 may be integrated with the audio connection or integrated on the MIDI device 1, and the AMC chip 5 has a demodulation algorithm for demodulating the second audio signal into a MIDI signal.
In the signal transmission method according to the first and second embodiments of the present invention, a MIDI signal from a first device is modulated into a preset audio carrier to form a first audio signal; transmitting the first audio signal to a second device over an audio connection line; or, receiving a second audio signal from a second device through the audio connection line; and demodulating the second audio signal to obtain a MIDI signal. Therefore, an external audio signal processor is not needed, information exchange between the first equipment and the second equipment can be realized only by taking one audio connecting wire as a transmission carrier, convenience is brought to information transmission between the intelligent equipment 2 and the MIDI equipment 1, and audio signal transmission is simpler and more convenient.
EXAMPLE III
As shown in fig. 5, a signal transmission apparatus according to an embodiment of the present invention includes:
the modulation unit is used for modulating the MIDI signal from the first equipment into a preset audio carrier to form a first audio signal;
in the embodiment of the invention, when the first device transmits the MIDI signal to the outside through the audio connection line, the modulating unit modulates the MIDI signal from the first device into the preset audio carrier to form the first audio signal for transmission in the audio channel.
A transmitting unit, configured to transmit the first audio signal to a second device through an audio connection line;
in the embodiment of the invention, after the MIDI signal from the first device is modulated into the first audio signal by the modulation unit, the first audio signal is transmitted to the second device through the audio connecting line of the sending unit.
A receiving unit for receiving a second audio signal from a second device through an audio connection line;
in the embodiment of the invention, when the second device transmits the second audio signal outwards, the second audio signal is transmitted through the audio connecting line of the receiving unit.
And the demodulation unit is used for demodulating the second audio signal to obtain a MIDI signal.
In an embodiment of the present invention, a demodulation process of the demodulation unit is an inverse operation of the modulation process of the modulation unit, and the demodulation unit demodulates the second audio signal from the receiving unit to obtain a MIDI signal for the first device to identify.
As an optional embodiment, the modulation unit is specifically configured to modulate the MIDI signal from the first device into a preset audio carrier by at least one of the following modulation manners: frequency modulation, amplitude modulation, phase modulation.
As shown in fig. 6, as an alternative embodiment, the adopted modulation mode includes the frequency modulation;
the modulation unit includes:
the coding module is used for coding the MIDI signal in a binary mode, each byte has 8 bits, and each bit is a digital '0' or a digital '1';
and the modulation module is used for modulating the preset audio carrier wave into a first frequency by using a digital '0' in the MIDI signal and modulating the preset audio carrier wave into a second frequency by using a digital '1' in the MIDI signal, wherein the first frequency is different from the second frequency.
Example four
Fig. 7 is a schematic structural diagram of an embodiment of an electronic device of the present invention, which may implement the process of the embodiment shown in fig. 1 or fig. 2 of the present invention, and as shown in fig. 7, the electronic device may include: the device comprises a shell 41, a processor 42, a memory 43, a circuit board 44 and a power circuit 45, wherein the circuit board 44 is arranged inside a space enclosed by the shell 41, and the processor 42 and the memory 43 are arranged on the circuit board 44; a power supply circuit 45 for supplying power to each circuit or device of the electronic apparatus; the memory 43 is used for storing executable program code; the processor 42 executes a program corresponding to the executable program code by reading the executable program code stored in the memory 43, so as to execute the method for playing the video by using the web browser according to any one of the foregoing embodiments.
For the specific execution process of the above steps by the processor and the steps further executed by the processor by running the executable program code, reference may be made to the description of the above embodiments of the present invention, which is not described herein again.
The electronic device exists in a variety of forms, including but not limited to:
(1) a mobile communication device: such devices are characterized by mobile communications capabilities and are primarily targeted at providing voice, data communications. Such terminals include: smart phones (e.g., iphones), multimedia phones, functional phones, and low-end phones, among others.
(2) Ultra mobile personal computer device: the equipment belongs to the category of personal computers, has calculation and processing functions and generally has the characteristic of mobile internet access. Such terminals include: PDA, MID, and UMPC devices, etc., such as ipads.
(3) A portable entertainment device: such devices can display and play multimedia content. This type of device comprises: audio, video players (e.g., ipods), handheld game consoles, electronic books, and smart toys and portable car navigation devices.
(4) A server: the device for providing the computing service comprises a processor, a hard disk, a memory, a system bus and the like, and the server is similar to a general computer architecture, but has higher requirements on processing capacity, stability, reliability, safety, expandability, manageability and the like because of the need of providing high-reliability service.
(5) And other electronic equipment with data interaction function.
EXAMPLE five
A computer-readable storage medium storing one or more programs, which are executable by one or more processors, to implement any one of the signal transmission methods provided by the foregoing embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
For convenience of description, the above devices are described separately in terms of functional division into various units/modules. Of course, the functionality of the units/modules may be implemented in one or more software and/or hardware implementations of the invention.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
1. A signal transmission method, characterized in that,
modulating a MIDI signal from a first device into a preset audio carrier to form a first audio signal; transmitting the first audio signal to a second device over an audio connection line;
or,
receiving a second audio signal from a second device over the audio connection line; demodulating the second audio signal to obtain a MIDI signal;
the first device is a MIDI device, the second device is an intelligent device, or the first device is an intelligent device, and the second device is a MIDI device;
the MIDI equipment is integrated with an AMC chip, or the AMC chip is integrated on the audio connecting line; the AMC chip is provided with a modulation algorithm for modulating the MIDI signal into a first audio signal, and the number of the audio connecting lines is one;
the modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises: the MIDI signal of the first device is transformed into a high frequency signal suitable for channel transmission.
2. The signal transmission method according to claim 1, wherein the first device is a MIDI device, and the second device is a smart device;
the modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises:
converting a MIDI signal generated by MIDI equipment into the first audio signal through a preset AMC chip;
the sending the first audio signal to a second device over an audio connection line comprises:
transmitting the first audio signal to the second device through a microphone signal line connected between the first device and the second device.
3. The signal transmission method according to claim 1, wherein the first device is a MIDI device, and the second device is a smart device;
the receiving a second audio signal from a second device over an audio connection line comprises:
receiving a second audio signal from the second device through a headphone signal line connected between the first device and the second device;
the demodulating the second audio signal to obtain a MIDI signal comprises:
and converting the received second audio signal into an MIDI signal through a preset AMC chip.
4. The signal transmission method according to claim 1, wherein the first device is an intelligent device, and the second device is a MIDI device;
the modulating the MIDI signal from the first device into a preset audio carrier to form a first audio signal comprises:
converting a MIDI signal from a first device into the first audio signal through preset software;
the sending the first audio signal to a second device over an audio connection line comprises:
transmitting the first audio signal to the second device through an earphone signal line connected between the first device and the second device.
5. The signal transmission method according to claim 1, wherein the first device is an intelligent device, and the second device is a MIDI device;
the receiving a second audio signal from a second device over an audio connection line comprises:
receiving a second audio signal from the second device through a microphone signal line connected between the first device and the second device;
the demodulating the second audio signal to obtain a MIDI signal comprises:
and converting the received second audio signal into a MIDI signal through preset software.
6. The signal transmission method according to any one of claims 1 to 5, wherein the modulating the MIDI signal from the first device into the predetermined audio carrier comprises modulating the MIDI signal from the first device into the predetermined audio carrier by at least one of the following modulation schemes: frequency modulation, amplitude modulation, phase modulation.
7. The signal transmission method according to claim 6, wherein the adopted modulation mode comprises the frequency modulation;
said modulating the MIDI signal from the first device into the preset audio carrier comprises:
encoding the MIDI signal in a binary mode, wherein each byte has 8 bits, and each bit is a digital '0' or a digital '1';
modulating the preset audio carrier wave into a first frequency by using a digital '0' in the MIDI signal, and modulating the preset audio carrier wave into a second frequency by using a digital '1' in the MIDI signal, wherein the first frequency is different from the second frequency.
8. The signal transmission method according to any one of claims 1 to 5, wherein the frequency range of the preset audio carrier is: 0-44.1 kHz.
9. A signal transmission apparatus, comprising:
the modulation unit is used for modulating the MIDI signal from the first equipment into a preset audio carrier to form a first audio signal;
a transmitting unit, configured to transmit the first audio signal to a second device through an audio connection line;
a receiving unit for receiving a second audio signal from a second device through an audio connection line;
the demodulation unit is used for demodulating the second audio signal to obtain a MIDI signal;
the first device is a MIDI device, the second device is an intelligent device, or the first device is an intelligent device, and the second device is a MIDI device;
the MIDI equipment is integrated with an AMC chip, or the AMC chip is integrated on the audio connecting line; the AMC chip is provided with a modulation algorithm for modulating the MIDI signal into a first audio signal, and the number of the audio connecting lines is one;
the modulation unit is particularly adapted to transform a MIDI signal of the first device into a high frequency signal suitable for channel transmission.
10. The signal transmission apparatus according to claim 9, wherein the modulation unit is specifically configured to modulate the MIDI signal from the first device into the preset audio carrier by at least one of the following modulation manners: frequency modulation, amplitude modulation, phase modulation.
11. The signal transmission apparatus according to claim 10, wherein the modulation scheme adopted includes the frequency modulation;
the modulation unit includes:
the coding module is used for coding the MIDI signal in a binary mode, each byte has 8 bits, and each bit is a digital '0' or a digital '1';
and the modulation module is used for modulating the preset audio carrier wave into a first frequency by using a digital '0' in the MIDI signal and modulating the preset audio carrier wave into a second frequency by using a digital '1' in the MIDI signal, wherein the first frequency is different from the second frequency.
12. An electronic device, characterized in that the electronic device comprises: the device comprises a shell, a processor, a memory, a circuit board and a power circuit, wherein the circuit board is arranged in a space enclosed by the shell, and the processor and the memory are arranged on the circuit board; a power supply circuit for supplying power to each circuit or device of the electronic apparatus; the memory is used for storing executable program codes; the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for executing the signal transmission method of any one of the preceding claims 1 to 8.
13. A computer-readable storage medium, characterized in that the computer-readable storage medium stores one or more programs which are executable by one or more processors to implement the signal transmission method of any one of the preceding claims 1 to 8.
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