CN110535479B - System for identifying information through broadcasting - Google Patents
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- CN110535479B CN110535479B CN201910831470.5A CN201910831470A CN110535479B CN 110535479 B CN110535479 B CN 110535479B CN 201910831470 A CN201910831470 A CN 201910831470A CN 110535479 B CN110535479 B CN 110535479B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/10—Arrangements for replacing or switching information during the broadcast or the distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/56—Arrangements characterised by components specially adapted for monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
- H04H60/58—Arrangements characterised by components specially adapted for monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 of audio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
- H04H60/78—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by source locations or destination locations
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- Signal Processing (AREA)
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- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a system for identifying information by broadcasting, which comprises an audio transmitting device and an audio receiving device, wherein the audio transmitting device is used for transmitting audio information; the audio transmitting device comprises a first audio file; the system comprises a machine code, a disturbance-free information file and an audio setting unit connected with the disturbance-free information file, wherein the audio setting unit establishes a corresponding relation between the disturbance-free information file and the machine code, sets a second frequency range which cannot be identified by human ears for the machine code, and sends a first audio signal and an audio signal obtained by superposing the second audio signal to an audio receiving device; the audio receiving device comprises a frequency filtering unit, wherein the received audio signals are filtered according to a preset first frequency range and a preset second frequency range to respectively obtain a first frequency range signal and a second frequency range signal, and the second frequency range signal is restored through an audio decoding unit to obtain an anti-disturbance information file.
Description
Technical Field
The invention relates to the technical field of audios and videos, in particular to a system for loading second audio information of a specific frequency band in a first audio and performing information interaction by using the additionally loaded second audio information.
Background
The common audio playing device comprises a broadcast-transmittable sound frequency range of 20 Hz to 20 kHz, a theoretical maximum human-audible sound frequency range of 20 Hz to 20 kHz, and a human-audible sound frequency range of 20 Hz to 17kHz in real life.
The sound from 17kHz to 20 kHz can be mixed in the program of the audio playing device, and the sound from 17kHz to 20 kHz is utilized to interact with the terminal, so that more information is transmitted, and more functions are completed.
Therefore, the prior art is widely applied to the technology of how to load 17khz to 20 khz sound in general audio, and further improvement and development are needed.
Disclosure of Invention
In view of the above problem, the present invention provides a method for adding second audio frequency range information in a first audio frequency range, wherein the second audio frequency range information is non-disturbing information, so that the first audio frequency range information transfers more information in the process of propagation.
In order to solve the above problems, the present invention discloses a system for identifying information by broadcasting, comprising an audio transmitting device, an audio receiving device, wherein,
the audio transmitting device comprises a first audio file and a first digital-to-analog conversion circuit, wherein the first digital-to-analog conversion circuit converts the first audio file into an analog signal first audio signal in a first frequency range;
the audio sending device further comprises a disturbance-free information file and an audio setting unit connected with the disturbance-free information file, wherein the audio setting unit establishes a corresponding relation between the disturbance-free information file and the machine code and sets a second frequency range which cannot be identified by human ears for the machine code; converting the code corresponding to the second frequency range into a second audio signal through a second digital conversion circuit;
the mixing unit sends the first audio signal and the audio signal obtained by superposing the second audio signal to the audio receiving device;
the audio receiving device comprises a frequency filtering unit, and the audio receiving device filters received audio signals according to a preset first frequency range and a preset second frequency range to respectively obtain a first frequency range signal and a second frequency range signal, and the second frequency range signal is restored by an audio decoding unit to obtain an interference-free information file.
The system, wherein the first frequency range is 20 hertz to 17KHZ and the second frequency range is 17KHZ-20 KHZ.
The system, wherein, the audio frequency setting unit includes frequency setting database, the frequency setting database includes data, machine code, code frequency confirm and the corresponding relation of code propagation duration.
The system of (1), wherein the audio receiving apparatus includes an audio decoding unit having a frequency setting database synchronized with the audio setting unit.
The system, wherein, the audio decoding unit also has a second code duration adjustment module connected with the encoding module, the second code duration adjustment module monitors the decoding data processing of the decoding module; when the load of the decoding module exceeds a threshold value, the second code duration adjusting module shortens the code propagation duration and sends the shortened data to the first code duration adjusting module of the audio setting unit; and the first code duration adjusting module adjusts data according to the received frequency and sends the data to a frequency setting database connected with the coding module.
The system comprises an audio decoding unit, an audio setting unit and a first code frequency adjusting unit, wherein the audio decoding unit is provided with a second code frequency adjusting module connected with an encoding module, when the load of the decoding module exceeds a threshold value, the second code frequency increases a frequency band for data of a specified type, the increased data transmission frequency band data is sent to the first code frequency adjusting module of the audio setting unit, and the first code frequency adjusting module adjusts data according to the received frequency and sends the data to a frequency setting database connected with the encoding module.
The system, wherein, audio frequency transmitting device sets up first audio frequency and video transmitting device for the exhibition gate, set up the information file of exempting from disturbing that has control instruction in the first audio frequency and video transmitting device, control instruction includes exhibition application software search instruction, exhibition application software download instruction, exhibition map download instruction.
The system, wherein, each stand sets up second audio frequency transmitting device respectively, sends the file of exempting from to disturb that has the propaganda information file.
The system, wherein, the audio receiving device includes the information receiving setting unit of setting information filtering, the information receiving setting unit connects the audio signal receiving module of the audio receiving device, the information receiving setting unit is used for setting the corresponding relation between the power of the audio signal receiving module and the signal source distance.
The system described above, wherein the audio receiving apparatus includes a position confirmation unit that determines the current position of the audio receiving apparatus based on the serial number of the exhibition stand where the audio receiving apparatus travels to receive the advertisement information.
Compared with the prior art, according to the scheme provided by the invention, the mixing unit of the audio sending device converts the first audio file into the first audio signal in the first frequency range, and sends the audio signal obtained by superposing the converted second audio signal in the second frequency range of the disturbance-free information file to the audio receiving device. The audio receiving device receives the disturbance-free information file without disturbance while normally receiving the first audio file, and enriches the content spread in the audio file sending process. The invention establishes a coding mechanism corresponding to the disturbance-free information file and the machine code, and the audio sending device and the audio receiving device realize information transmission through an inter-translation mechanism.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows an architectural diagram of a system for identifying information by broadcast in accordance with the present invention;
FIG. 2 is a schematic diagram showing the structure of an audio setting unit and an audio decoding unit according to the present invention;
fig. 3 is a schematic structural diagram of an audio receiving apparatus when the present invention is applied to an exhibition.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In some of the flows described in the present specification and claims and in the above-described figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein, with the order of the operations being indicated as 101, 102, etc. merely to distinguish between the various operations, and the order of the operations by themselves does not represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 first preferred embodiment of the system for identifying information by broadcasting provided by the invention, as shown in fig. 1, comprises an audio transmitting device and an audio receiving device. The audio frequency sending device is used for playing the audio file with the disturbance-free information, the audio frequency sending device sends the first audio frequency file that the human ear can be normally identified, the disturbance-free information file that the human ear can not be identified can be mixed in the first audio frequency file, the disturbance-free information file is sent when the first audio frequency file is sent, the audio frequency receiving device is enabled to normally receive the first audio frequency file, the disturbance-free information file is received without disturbance, and the content transmitted in the audio frequency file sending process is enriched.
The audio sending device comprises a first audio file and a first digital-to-analog conversion circuit, wherein the first digital-to-analog conversion circuit converts the first audio file into an analog signal in a first frequency range, the first frequency range can be 20 Hz to 17kHz, and the first frequency range is determined according to the recognition range of people to audio.
The audio sending device further comprises a disturbance-free information file and an audio setting unit connected with the disturbance-free information file. The disturbance-free information file can comprise types such as a control instruction file and a propaganda information file, and different propagation frequencies and propagation durations can be set for different types of files.
The audio setting unit comprises a frequency setting database, the frequency setting database comprises data, machine codes, code frequency determination and code propagation duration determination, and the following specifically shows:
the audio setting unit sets corresponding machine codes, frequencies and propagation duration for the disturbance-free information, wherein the frequencies are in a second frequency range, the second frequency range is a frequency range which cannot be identified by human ears, and the frequency range is preferably 17KHZ-20 KH. The 17KHZ-20KH audio signal is difficult to identify by human ears, but does not belong to ultrasonic waves, so that the interference to other electronic devices is small, and the audio signal is a frequency band which is preferably selected after a large number of experiments.
The audio setting unit of the invention establishes the corresponding relation between the disturbance-free information file and the machine code, sets the frequency which can not be identified by human ears for the machine code, converts the disturbance-free information file into the code corresponding to the second frequency range which can not be identified by human ears, can transmit the hidden signal in the audio information which can be identified by human ears, does not influence the playing of normal audio, and realizes the disturbance-free transmission of information. And then the codes corresponding to the second frequency range are converted into second audio signals through a second digital conversion circuit.
And the mixing unit of the audio transmitting device converts the first audio file into a first audio signal in a first frequency range, and transmits the audio signal obtained by superposing a second audio signal in a second frequency range converted from the disturbance-free information file to the audio receiving device.
The audio receiving device comprises a frequency filtering unit, wherein the received audio signals are filtered according to a preset first frequency range and a preset second frequency range to respectively obtain a first frequency range signal and a second frequency range signal, and the first frequency range signal is restored through a third digital-to-analog conversion circuit to obtain a first audio file which can be directly identified by human ears; and the second frequency range signal is restored by an audio decoding unit to obtain an undisturbed information file. The invention establishes a coding mechanism corresponding to the disturbance-free information file and the machine code, and the audio sending device and the audio receiving device realize information transmission through an inter-translation mechanism.
The audio decoding unit of the present invention has a frequency setting database synchronized with the audio setting unit, as shown in fig. 2, the audio decoding unit further has a second code duration adjustment module connected to the decoding module, the second code duration adjustment module monitors the decoding data processing of the decoding module, when the load of the decoding module exceeds a threshold, the second code duration adjustment module shortens the code propagation duration according to a preset strategy and sends the shortened data to the first code duration adjustment module of the audio setting unit, and the first code duration adjustment module sends the received frequency adjustment data to the frequency setting database connected to the encoding module.
The audio decoding unit is also provided with a second code frequency adjusting module connected with the decoding module, when the load of the decoding module exceeds a threshold value, the second code frequency adjusting module adds a frequency band to the data of a specified type according to a preset strategy, for example, the propaganda information receiving unit can set the frequency of 0 to be 18.9KHZ, the frequency of 1 to be 19.9KHZ, the frequency of 0 to be 18.8KHZ and the frequency of 1 to be 19.9KHZ, and the data transmission rate is increased by a multi-band method. The second frequency adjustment module increases the frequency band of data transmission and sends the increased data transmission frequency band data to the first code frequency adjustment module of the audio setting unit, and the first code frequency adjustment module sends the received frequency adjustment data to the frequency setting database connected with the coding module.
When the second frequency range signals are the same type of data, the second frequency range signals form a signal stream in sequence, and the signal stream is transmitted to the audio setting unit in sequence, so that the audio processing mode is a serial data processing mode. The audio setting unit collects the second frequency range signals with the same frequency band data in sequence each time and synchronously performs machine code coding and analog signal conversion, and the process is parallel data processing. The audio decoding unit receives analog signals of a plurality of frequency band data, and decodes the analog signals according to the same sequence as the audio setting unit to obtain corresponding machine codes, which are parallel data processing. And then, restoring the machine codes of the multiple frequency bands into a signal stream, and restoring the signal stream into a serial data processing mode.
The audio setting unit and the audio decoding unit can dynamically adjust the frequency and the code propagation duration according to the data transmission quantity, and improve the data transmission rate.
In another preferred embodiment of the present invention, the audio transmitting apparatus and the audio receiving apparatus may also be a video transmitting and receiving apparatus and a video receiving apparatus, and the transmission and reception of video data by the video transmitting apparatus and the video receiving apparatus are prior art, but the transmission and reception of the audio signal is innovative, so that the audio signal is transmitted and received without disturbing the propagation hidden signal.
Another preferred embodiment of the present invention can use the hidden disturbance-free signal during audio transmission and reception in the information transmitting and receiving device of the exhibition, and recommend the exhibition route according to the reception condition of the disturbance-free signal, as shown in fig. 3 in detail.
Each exhibition stand of the exhibition is provided with an audio and video playing device, the user terminal is provided with an audio receiving device, the audio receiving device can be application software in a mobile phone, and the specific form is not limited here.
The exhibition can enter the mouth at the exhibition to and the exhibition gate sets up first audio frequency and video transmitting device set up among the first audio frequency and video transmitting device and have control command's the information file of exempting from disturbing, control command includes exhibition application software search instruction, exhibition application software download instruction, exhibition map download instruction etc. make the user before getting into the stand, can pass through frequency filtering unit at audio frequency receiving device, filter the second frequency range signal that obtains, and audio decoding unit obtains and carry out these control command, make in the audio frequency receiving device that the exhibitor used enter the mouth to the in-process of stand from the exhibition, according to control command in advance, download and install relevant exhibition recommendation module.
And a second audio transmitting device is respectively arranged at each exhibition stand to transmit the disturbance-free file with the propaganda information file.
The audio receiving apparatus is the same as the audio receiving apparatus of the first embodiment, and for the receiving structure of the disturbance-free information file, this embodiment is not repeated, as shown in fig. 3 (a part included in fig. 1 is omitted in this figure), the audio receiving apparatus includes a propaganda information receiving unit and a propaganda information selecting unit connected to the propaganda information receiving unit, the propaganda information receiving unit is used for receiving an audio signal sent by an audio playing apparatus when a presenter visits a display stand, the disturbance-free information file in the audio signal may be propaganda information of the display stand, and the audio receiving apparatus obtains the detailed content of the propaganda information through a second frequency range signal obtained by a frequency filtering unit and an audio decoding unit.
Because the exhibition stands are numerous, the quantity of the propaganda information sent by the exhibition stands is large, and in order to ensure that the audio receiving device receives effective propaganda information, the invention sets an information receiving and setting unit for information filtering. The information receiving setting unit is connected with an audio signal receiving module of the audio receiving device, and the audio receiving device sets the corresponding relation between the power of the audio signal receiving module and the distance of a signal source. The invention provides a method for receiving audio signals within a threshold distance range by adjusting the power of an audio signal receiving module in an audio receiving device, so as to receive the audio signals of a display stand within the threshold distance range.
The propaganda information can carry the serial number of the exhibition stand, and the audio receiving device receives the propaganda information of the exhibition stand in a fixed distance through the information receiving setting unit.
The invention selects the interesting exhibition stand information from the received exhibition stand propaganda information within the fixed distance through the propaganda information selection unit. All the information of the exhibition stand can be set with the classification label in advance,
according to the invention, the clicked propaganda information is recorded according to the click of the propaganda information selection unit, and the interested label of the interested exhibition stand classification is obtained.
In addition, the position confirmation unit of the invention determines the current position of the audio receiving device according to the serial number of the exhibition stand which receives the propaganda information by the audio receiving device.
The exhibition route recommending unit of the audio receiving device recommends the nearest exhibition route which is the same as the interest label for the user according to the exhibition arrangement map, the interest label of interest classification obtained by the propaganda information clicking record and the current position, and guides and displays the recommended route through the exhibition route guiding unit by using arrows corresponding to the front, the back, the left and the right.
The exhibition route optimizing unit is connected with the exhibition route recommending unit, the exhibition route optimizing unit can count the number of people around each exhibition stand, congestion exhibition stands are set for the exhibition stands with the number of people exceeding a threshold number, the exhibition route optimizing unit is combined with the positions of the exhibition stands and the congestion conditions of the exhibition stands to avoid the congestion exhibition stands, and a quick route is provided for users to reach interested exhibition stands.
The exhibition route optimizing unit further comprises an exhibition stand monitoring unit, wherein the exhibition stand monitoring unit is used for performing polling monitoring on the congestion condition of a target exhibition stand which is the same as the interest tag, the number of people near the exhibition stand reaches a first threshold value, namely severe congestion, a second threshold value is congestion, a third threshold value is good, and a fourth threshold value is excellent; when the congestion condition of the interested target exhibition stand reaches a set threshold value, the exhibition route guiding unit immediately displays a route map guiding the target exhibition stand according to the position of the audio receiving device.
While the present invention has been described in detail with reference to the embodiments of the present invention, it will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A system for identifying information through broadcasting comprises an audio transmitting device and an audio receiving device, and is characterized in that the system is applied to the transmission of exhibition application software control instructions and the transmission of exhibition propaganda information files;
the audio transmitting device comprises a first audio file and a first digital-to-analog conversion circuit, wherein the first digital-to-analog conversion circuit converts the first audio file into an analog signal first audio signal in a first frequency range;
the audio sending device also comprises a disturbance-free information file and an audio setting unit, wherein the disturbance-free information file comprises a control instruction file and a propaganda information file, and different types of files are set with different propagation frequencies and propagation durations; the audio setting unit is connected with the disturbance-free information file, establishes a corresponding relation between the disturbance-free information file and the machine code, and sets a second frequency range which cannot be identified by human ears for the machine code; converting the code corresponding to the second frequency range into a second audio signal through a second digital conversion circuit;
the mixing unit sends the first audio signal and the audio signal obtained by superposing the second audio signal to the audio receiving device;
the method comprises the steps that a first audio and video transmitting device is arranged at an exhibition entrance, and a disturbance-free information file with a control instruction is arranged in the first audio and video transmitting device;
respectively arranging a second audio transmitting device at each exhibition stand, and transmitting a disturbance-free file with a propaganda information file;
the audio receiving device comprises a frequency filtering unit and an audio decoding unit, wherein the audio receiving device filters received audio signals according to a preset first frequency range and a preset second frequency range to respectively obtain a first frequency range signal and a second frequency range signal, and the second frequency range signal is restored by the audio decoding unit to obtain an interference-free information file; receiving a disturbance-free information file with a control instruction in an audio receiving device, wherein the control instruction comprises an exhibition application software searching instruction, an exhibition application software downloading instruction, an exhibition map installing instruction, a network connection opening instruction and a position judging instruction;
receiving a disturbance-free information file with propaganda information in the audio receiving device;
when the disturbance-free information files are the same type of data, the disturbance-free information files form signal streams in sequence, and the signal streams are transmitted to the audio setting unit in sequence, so that the data processing mode is a serial data processing mode; the audio setting unit collects the disturbance-free information files in sequence each time and synchronously performs coding of machine codes and analog signal conversion, and the process is parallel data processing;
the audio decoding unit receives analog signals of data in different frequency bands, and decodes the analog signals according to the same sequence as the audio setting unit to obtain corresponding machine codes, which are parallel data processing; then, restoring the machine code into a signal stream again, and restoring the signal stream into a serial data processing mode;
the information receiving setting unit is connected with an audio signal receiving module of the audio receiving device and sets the corresponding relation between the power of the audio signal receiving module and the distance of a signal source.
2. The system of claim 1, wherein the first frequency range is 20 hertz to 17KHZ and the second frequency range is 17KHZ-20 KHZ.
3. The system of claim 2, wherein the audio setting unit comprises a frequency setting database comprising a correspondence of data, machine codes, code frequency determinations, and code propagation durations.
4. The system of claim 3, wherein the audio receiving device comprises an audio decoding unit having a frequency setting database synchronized with the audio setting unit.
5. The system of claim 4, wherein the audio decoding unit further has a second code duration adjustment module connected to the decoding module, the second code duration adjustment module monitoring decoded data processing of the decoding module; when the load of the decoding module exceeds a threshold value, the second code duration adjusting module shortens the code propagation duration and sends the shortened data to the first code duration adjusting module of the audio setting unit; and the first code duration adjusting module sends the received duration adjusting data to a frequency setting database connected with the coding module.
6. The system of claim 4, wherein the audio decoding unit has a second code frequency adjustment module connected to the decoding module, and when the load of the decoding module exceeds a threshold, the second code frequency adjustment module adds a frequency band to the data of the specified type and sends the added data propagation frequency band data to the first code frequency adjustment module of the audio setting unit, and the first code frequency adjustment module sends the received frequency adjustment data to the frequency setting database connected to the encoding module.
7. The system of claim 4, wherein the audio receiving device comprises a position confirmation unit, and the position confirmation unit determines the current position of the audio receiving device according to the serial number of the promotional information exhibition stand received by the audio receiving device.
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| CN102355308A (en) * | 2011-06-24 | 2012-02-15 | 软库创投（北京）科技有限公司 | Information transmission method, receiving method and terminal equipment |
| CN103248434A (en) * | 2012-02-14 | 2013-08-14 | 上海爱加科技有限公司 | Communication method for electronic device |
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