KR101392984B1 - Apparatus and method for receiving data through non-audible frequency - Google Patents

Abstract

An apparatus and method for receiving data through an audiovisual frequency are disclosed. The present invention relates to a method and apparatus for transmitting audio data generated by transmitting data on an audible frequency and acquiring data on a voice signal transmitted on an audiovisual frequency band and storing data including content access information on an audiovisual frequency band to provide. According to the present invention, it is possible to transmit data through a sound that a person can not hear, so that various services can be provided to users without active act of the user, and various information can be delivered through sounds that people can not hear, / Various additional services can be provided to the user who listens.

Description

[0001] Apparatus and method for receiving data through non-audible frequencies [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for receiving data through an audiovisual frequency, and more particularly to an apparatus and method for transmitting data on an audiovisual frequency and acquiring data from a voice signal transmitted through the audiovisual frequency band .

Recent developments in technology have led to the development of advertising / promotion methods using various media. For example, a method of transmitting data through an audio frequency, such as a method of broadcasting a voice advertisement in a subway, or a method of accessing a specific web page by a user through a barcode or a QR code is used.

However, there is a problem that the method of advertising / promoting by voice through the audio frequency is recognized as noise by the user, and the effect is not obtained. In addition, a method of advertising / promoting through a barcode or a QR code requires that a user actively shoot a bar code or a QR code, and in a public space with many people, they are conscious of the gaze of another person and are reluctant to shoot. In addition, such advertisement / publicity methods have a problem in that there is a time difference between the exposure time and the user's perceived time so that the proper advertisement / publicity effect can not be obtained.

Patent Document 1 discloses a digital device for treating a disease using a non-audible frequency wave of a functional digital file or data, and Patent Document 1 discloses a digital device for treating a disease, The use of functional waves to achieve the purpose of diet, insomnia treatment, mental and physical stability and concentration is disclosed. Patent Document 2 discloses a wireless communication terminal having an opening / closing detection function using a signal of an inaudible frequency band and a method thereof, and Patent Document 2 discloses a wireless communication terminal having a non- The display unit is activated through the switch by detecting the opening of the sub-body by using the signal, and the display unit is inactivated through the switch as the sub-body is closed. As a result, the malfunction caused by the self- Is prevented.

An object of the present invention is to provide an apparatus and method for receiving data through a non-audible frequency for transmitting data on an audible frequency and acquiring data from a voice signal transmitted through an audible frequency band.

According to another aspect of the present invention, there is provided a program for causing a computer to execute a method of receiving data through a non-audible frequency for transmitting data on an audible frequency and acquiring data from a voice signal transmitted through the non- And an object of the present invention is to provide a computer-readable recording medium having recorded thereon a computer program.

According to another aspect of the present invention, there is provided an apparatus for receiving data through a non-audible frequency, comprising: a voice receiving unit including an audio receiving module; A noise analyzer for analyzing the intensity of the ambient noise received through the audio receiving module; A data receiving unit for receiving a voice signal transmitted through the non-audible frequency band through the audio receiving module; And a demodulator for demodulating the speech signal to obtain actual data if the intensity of the speech signal received by the data receiver is greater than the intensity of the ambient noise analyzed by the noise analyzer.

According to another aspect of the present invention, there is provided a method of receiving data through a non-audible frequency, comprising: analyzing an intensity of a surrounding noise received through an audio receiving module; Receiving a voice signal transmitted through the non-audible frequency band through the audio receiving module; And demodulating the speech signal to obtain actual data if the strength of the received speech signal is greater than the intensity of the ambient noise.

According to another aspect of the present invention, there is provided a computer readable medium storing a program for causing a computer to execute a method of receiving data through an audible frequency.

According to the apparatus and method for receiving data through a non-audible frequency according to the present invention, by transmitting data on an audible frequency and acquiring data from a voice signal transmitted through the non-audible frequency band, So that it is possible to provide various services to the user without the active action of the user.

1 is a block diagram for explaining a data transmitting apparatus using a non-audible frequency according to a preferred embodiment of the present invention;
2 is a diagram for explaining an operation of transmitting data on an audible frequency according to a preferred embodiment of the present invention;
3 is a view for explaining a data receiving apparatus through a non-audible frequency according to a preferred embodiment of the present invention,
4 is a view for explaining an operation for confirming whether data is transmitted through a non-audible frequency according to a preferred embodiment of the present invention;
5 and 6 are diagrams for explaining an operation of acquiring data from a speech signal according to a preferred embodiment of the present invention;
FIG. 7 is a diagram for explaining an operation of acquiring data from a voice signal transmitted through the non-audible frequency band according to a preferred embodiment of the present invention;
FIG. 8 is a flowchart illustrating a method of transmitting data through a non-audible frequency according to a preferred embodiment of the present invention;
FIG. 9 is a flowchart illustrating a method of receiving data through a non-audible frequency according to a preferred embodiment of the present invention;
FIG. 10 is a block diagram for explaining an audio data providing apparatus using a non-audible frequency according to a preferred embodiment of the present invention;
FIG. 11 is a block diagram illustrating a configuration of an audio data providing apparatus using a non-audible frequency according to a preferred embodiment of the present invention,
12 is a flowchart illustrating a method of providing audio data using a non-audible frequency according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

FIG. 1 is a block diagram for explaining a data transmitting apparatus using a non-audible frequency according to a preferred embodiment of the present invention.

Referring to FIG. 1, an apparatus 100 for transmitting data through a non-audible frequency according to the present invention (hereinafter referred to as a "data transmitting apparatus") transmits data on a non-audible frequency. Here, the unclear frequency refers to a frequency band that can not be heard by human hearing. For example, the non-audible frequency includes a frequency of 18000 Hz or more. To this end, the data transmission apparatus 100 includes a data transmission unit 110 and a voice output unit 130.

The audio output unit 130 includes two audio output modules 131 and 133. Here, the audio output module 131 or 133 may include a speaker or the like. 1, the audio output unit 130 includes two audio output modules 131 and 133. However, the present invention is not limited thereto. For example, the audio output unit 130 may include an audio output module The number can be increased or decreased. For example, the audio output unit 130 may include one audio output module.

The data transmission unit 110 outputs data as a voice signal through the voice output unit 130 after storing the data at the non-audible frequency. That is, the data transmission unit 110 outputs the actual data and the reference data on the non-audible frequency and outputs the voice data through the voice output unit 130.

Here, the actual data represents data requested to be transmitted, and includes a predetermined preamble, a payload, a cyclic redundancy check (CRC), and the like. For example, the actual data includes "preamble + request code + error detection code", "preamble + IP address + port number + error detection code" and the like.

The reference data indicates whether actual data is transmitted or not. For example, the reference data is also transmitted while the actual data is transmitted, and the reference data is not transmitted while the actual data is not transmitted.

At this time, the data transmission unit 110 outputs the actual data to the first non-audible frequency through the first audio output module 131 and outputs the voice data to the second audio output module 133 as a voice signal.

Here, each of the first non-audible frequency and the second non-audible frequency refers to a frequency band preset in the non-audible frequency band, and the first non-audible frequency and the second audible frequency are set to be different from each other. For example, the first unvoiced frequency may use the band '21000 Hz' and the second unvoiced frequency may use the band '20000 Hz'. At this time, interference can be prevented by putting a difference between the first non-audible frequency and the second non-audible frequency by a predetermined magnitude.

In this way, by outputting the audio data through the audio output module which is different from the actual data and the reference data by being transmitted on different non-audible frequencies, it is possible to reduce a beating phenomenon and noise phenomenon during phase shift which may occur in data transmission.

2 is a view for explaining an operation of transmitting data on an audible frequency according to a preferred embodiment of the present invention.

Referring to FIG. 2, when data '10101010' is requested to be transmitted, the data transmission apparatus 100 modulates data '10101010'. Here, the modulation schemes include amplitude shift keying (ASK), frequency shift keying (FSK), and phase shift keying (PSK).

The data transmitting apparatus 100 outputs actual data based on the modulated data at a first non-audible frequency and outputs the voice data through the first audio output module 131 as a voice signal, And outputs it as a voice signal through the second audio output module 133.

3 is a view for explaining a data receiving apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 3, a data receiving apparatus 200 (hereinafter, referred to as a data receiving apparatus) through a non-audible frequency according to the present invention demodulates a voice signal transmitted through a non-audible frequency band to obtain data. The data receiving apparatus 200 includes a voice receiving unit 210, a noise analyzing unit 230, a data receiving unit 250, and a demodulating unit 270.

The audio receiving unit 210 includes at least one audio receiving module 211. Here, the audio receiving module 211 may include a microphone or the like.

The noise analysis unit 230 analyzes the intensity of the ambient noise received through the audio receiving module 211. The noise analyzer 230 may analyze the intensity of the ambient noise periodically or at a preset time.

The data receiving unit 250 receives a voice signal transmitted through the non-audible frequency band through the audio receiving module 211.

The demodulator 270 acquires data transmitted through the non-audible frequency band from the voice signal received by the data receiver 250. [ That is, the demodulator 270 demodulates the voice signal to obtain actual data if the strength of the voice signal received by the data receiver 250 is greater than the intensity of the ambient noise analyzed by the noise analyzer 230.

At this time, the demodulator 270 analyzes the strength of a voice signal corresponding to the first non-audible frequency and the second audible frequency, respectively, in the voice signal received by the data receiving unit 250, by the noise analyzer 230 It can be compared with the intensity of the ambient noise. At this time, the first non-audible frequency and the second non-audible frequency band are known to the data receiving apparatus 200 in advance.

4 is a view for explaining an operation for confirming whether data is transmitted through a non-audible frequency according to a preferred embodiment of the present invention.

Referring to FIG. 4, the demodulator 270 multiplies the strength of a speech signal corresponding to a first non-audible frequency DF and the strength of a speech signal corresponding to a second audible frequency BF, BU1, BU2, or BU3). Here, the intensity of the ambient noise uses one of an average intensity BU1 of the ambient noise, a maximum intensity BU2 of the ambient noise, and a predetermined ambient noise intensity BU3. As described above, the first non-audible frequency DF indicates the frequency band in which the actual data is transmitted, and the second audible frequency BF indicates the frequency band in which the reference data is transmitted.

If the strength of the voice signal corresponding to each of the first non-audible frequency and the second audible frequency is greater than the intensity of the ambient noise, the demodulation unit 270 outputs the reference data acquired from the voice signal corresponding to the second non- And acquires actual data by demodulating the voice signal corresponding to the first non-audible frequency. That is, the demodulator 270 demodulates the voice signal corresponding to the first non-audible frequency only while the reference data is being transmitted at a preset value, and obtains the actual data. For example, the demodulation unit 270 demodulates the voice signal only for a period in which the reference data is maintained at 1, acquires the actual data, and is a period during which the actual data is not transmitted during the period in which the reference data remains 0. Therefore, . ≪ / RTI >

More specifically, the demodulator 270 compares a value calculated based on the presence or absence of a voice signal corresponding to the first non-audible frequency with a reference value for a predetermined period of time, and obtains 1 or 0 as actual data. Here, a value calculated based on the presence or absence of a voice signal, and a reference value include an area size and the like. For example, when the actual area size calculated based on the presence or absence of the audio signal corresponding to the first non-audible frequency for a predetermined period is larger than the reference area size, which is a reference value used in actual data determination, the demodulation unit 270 outputs 1 If the actual area size is smaller than the reference area size, 0 is acquired as the actual data, and the actual data can be obtained from the speech signal corresponding to the first non-audible frequency in units of a predetermined period.

5 and 6 are views for explaining an operation of acquiring data from a speech signal according to a preferred embodiment of the present invention.

Referring to FIG. 5, on the basis of the presence or absence of a voice signal during a predetermined period (for example, '1 second') through a graph in which the horizontal axis represents time and the presence or absence of a voice signal corresponding to the first non- The actual area size can be calculated in units of a predetermined period.

Referring to FIG. 6, a comparison is made with a reference area size (BS) in units of a predetermined period (for example, '1 second') through a graph having a time as a horizontal axis and an area size as a vertical axis, If the size is larger than the BS, the actual data becomes 1. If the actual size is smaller than the reference area size BS, the actual data becomes 0. For example, the actual data obtained in '0 second ~ 1 second' and '3 seconds ~ 4 seconds' becomes 1, and the actual data obtained in '1 second ~ 2 seconds' and '2 seconds ~ 3 seconds' do.

At this time, the demodulator 270 may obtain the reference value through the preamble. That is, since the data transmitted through the preamble is also known in advance by the data receiving apparatus 200, the demodulating unit 270 demodulates the value calculated based on the presence or absence of the voice signal corresponding to the first non- The reference value can be determined through the amble. Thus, by obtaining the reference value variably, it is possible to demodulate the data stably even in an environment change.

7 is a view for explaining an operation of acquiring data from a voice signal transmitted through the non-audible frequency band according to a preferred embodiment of the present invention.

Referring to FIG. 7, the data receiving apparatus 200 filters the voice signal corresponding to the first non-audible frequency using the reference data obtained from the voice signal corresponding to the second non-audible frequency. Here, the filtering is performed through a fast Fourier transform (FFT) or the like. Then, the data receiving apparatus 200 demodulates the filtered speech signal to acquire data.

However, the present invention is not limited to this. However, the present invention is not limited to this, and the data receiving apparatus 200 may be a single data receiving apparatus, . ≪ / RTI > For example, the data receiving apparatus 200 according to the present invention may be implemented in software such as an application, or may be implemented in hardware such as a chip and installed in a conventional mobile terminal. Here, the conventional mobile terminal includes a portable computer, a tablet PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a mobile phone, a smart phone, .

8 is a flowchart illustrating a method of transmitting data through a non-audible frequency according to a preferred embodiment of the present invention.

The data transmitting apparatus 100 outputs actual data and reference data at a non-audible frequency and outputs the voice data through an audio output module. At this time, the data transmitting apparatus 100 may output actual data as a voice signal through the first audio output module by placing the data at the first non-audible frequency (S810). Then, the data transmitting apparatus 100 may output the reference data as a voice signal through the second audio output module by putting the reference data at the second non-audible frequency (S820).

Meanwhile, although it has been described that the second output step S820 is performed after the first output step S810, the order of execution may be changed according to the embodiment. Of course, the first output step S810 and the second output step S820 may be performed simultaneously.

9 is a flowchart illustrating a method of receiving data through a non-audible frequency according to a preferred embodiment of the present invention.

The data receiving apparatus 200 analyzes the intensity of the ambient noise (S910). The data receiving apparatus 200 receives the voice signal transmitted through the invisible frequency band (S920).

The data receiving apparatus 200 then demodulates the voice signal to obtain the actual data if the strength of the received voice signal is greater than the intensity of the ambient noise. At this time, if the intensity of the voice signal corresponding to the first non-audible frequency and the second audible frequency in the received voice signal is greater than the intensity of the ambient noise, then the data receiving apparatus 200 outputs the voice corresponding to the second non- The actual data may be obtained from the speech signal corresponding to the first non-audible frequency using the reference data obtained from the signal (S930). Here, the intensity of the ambient noise uses one of the average intensity of the ambient noise, the maximum intensity of the ambient noise, and the intensity of the ambient noise plus a predetermined value higher than the maximum intensity.

At this time, the data receiving apparatus 200 compares a value calculated based on the presence or absence of a voice signal corresponding to the first non-audible frequency with a reference value for a predetermined period of time, and obtains 1 or 0 as actual data. For example, when the actual area size calculated based on the presence or absence of the audio signal corresponding to the first non-audible frequency is greater than the reference area size for a predetermined period, the data receiving apparatus 200 obtains 1 as actual data, Is smaller than the reference area size, 0 is obtained as actual data, and actual data can be obtained from the speech signal corresponding to the first non-audible frequency in units of a predetermined period. Here, the data receiving apparatus 200 may acquire a reference value through the preamble.

Meanwhile, although it has been described that the voice signal receiving step (S920) is performed after the peripheral noise analyzing step (S910), the order of performing the voice signal may be changed according to the embodiment. Of course, the ambient noise analysis step S910 and the voice signal reception step S920 may be performed simultaneously.

In this way, data can be transmitted through a sound that a person can not hear by transmitting data on an audible frequency and acquiring data from a voice signal transmitted through an inaudible frequency band, thereby providing various services Can be provided to the user.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an apparatus and method for providing audio data using audiovisual frequency according to the present invention will be described in detail with reference to the accompanying drawings.

10 is a block diagram for explaining an audio data providing apparatus using a non-audible frequency according to a preferred embodiment of the present invention.

10, an audio data providing apparatus 300 (hereinafter, referred to as 'audio data providing apparatus') using an audible frequency according to the present invention includes a content providing apparatus 400 and a user terminal 500).

The audio data providing apparatus 300 provides the content providing apparatus 400 with the audio data generated by loading the actual data including the content access information provided from the content providing apparatus 400 in the invisible frequency band.

Here, the content access information refers to address information that can be accessed to a web page capable of identifying contents such as moving images, images, text, and the like. For example, when the 'IP address' and the' port number 'are provided from the content providing apparatus 400 or the user terminal 500, the audio data providing apparatus 300 transmits' preamble + IP address + port number + "Can be obtained.

Of course, the audio data providing apparatus 300 may acquire actual data composed of "preamble + request code + error detection code ". Here, the request code is identification information capable of identifying 'IP address and port number' provided from the content providing apparatus 400. In this case, the audio data providing apparatus 300 stores a table in which content access information provided from the content providing apparatus 400 is mapped according to the request code. When the content access information is requested from the user terminal 500, the content access information mapped to the request code is retrieved and the corresponding content access information is provided to the user terminal 500.

The content providing apparatus 400 includes an audio output module (not shown), and simultaneously outputs audio data included in various contents and audio data provided from the audio data providing apparatus 300 as audio signals through an audio output module . That is, the content providing apparatus 400 includes the data transmitting apparatus 100 according to the previous embodiment, and outputs the audio data provided from the audio data providing apparatus 300 as a voice signal. Here, the data transmission apparatus 100 may be implemented by software such as an application, or by hardware such as a chip or the like, and installed in the content providing apparatus 400.

Here, various contents include broadcast contents such as drama and home shopping broadcast, advertisement contents such as TV advertisements and radio advertisements, information contents such as station announcements, music contents such as cafe background music, and the like. Of course, the content providing apparatus 400 further includes a video output module (not shown), and can output video included in the content as a video signal.

For example, when outputting a home shopping broadcast, audio data generated based on content access information that can be accessed through a 'product detail view web page', a 'product order web page', etc., or 'event application web page' It is possible to output audio data generated based on accessibility information of contents to be accessed, audio data generated based on contents access information that can be connected to a 'station peripheral information web page' when a subway station announcement is outputted, and the like as a voice signal .

The user terminal 500 receives a voice signal transmitted from the content providing apparatus 400 through the inaudible frequency band, and acquires actual data from the received voice signal. That is, the user terminal 500 includes the data receiving apparatus 200 according to the previous embodiment, and obtains actual data from the voice signal received from the contents providing apparatus 400. Here, the data receiving apparatus 200 may be implemented in software such as an application, or may be implemented in hardware such as a chip and installed in the user terminal 400.

The user terminal 500 can access the corresponding web page through the actual data obtained from the received voice signal. That is, the user terminal 500 can access the web page through the content access information included in the actual data. For example, through the 'IP address and port number' included in the actual data, a specific web page such as 'product detail view web page', 'product order web page', 'event application web page' .

At this time, if the request code is included in the actual data, the user terminal 500 may request the contents access information while providing the corresponding request code to the audio data providing apparatus 300. The user terminal 500 can access the web page through the content access information provided from the audio data providing apparatus 300.

The user terminal 500 may include a computer, a tablet PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a mobile phone, a smart phone, and navigation devices.

The communication network 600 may include a data communication network including a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN) It does not matter whether it is wired or wireless, and any communication method can be used.

However, the present invention is not limited to this, and the contents providing apparatus 400 may be connected to the data transmitting apparatus 100 (100) according to the previous embodiment through the communication network 600, To an output device (not shown) provided with the content and audio data. Then, the output device can output the content and audio data. In this case, the user terminal 500 may receive a voice signal transmitted from the output device through the non-audible frequency band. For example, the output device refers to a television, a computer, a radio, or the like installed in a home, a restaurant, a restaurant, a cafe, or the like, or a broadcasting device installed in a facility.

11 is a block diagram illustrating a configuration of an audio data providing apparatus using a non-audible frequency according to a preferred embodiment of the present invention in more detail.

The audio data providing apparatus 300 includes an audio data generating unit 310, an audio data providing unit 330, an access information request receiving unit 350 and an access information providing unit 370.

The audio data generation unit 310 generates audio data by storing actual data including content access information provided from the content providing apparatus 400 or the user terminal 500 in an invisible frequency band. That is, the audio data generation unit 310 generates audio data by putting the actual data and the reference data on the non-audible frequency.

At this time, the audio data generation unit 310 generates the first audio track by putting the actual data at the first non-audible frequency. Then, the audio data generation unit 310 generates the second audio track by loading the reference data at the second non-audible frequency. The audio data generation unit 310 may generate audio data having a first audio track as a first channel and a second audio track as a second channel. Here, the first audio track and the second audio track are different from each other, and the first channel and the second channel are also different from each other.

The audio data providing unit 330 provides the audio data generated by the audio data generating unit 310 to the content providing apparatus 400.

The access information request receiving unit 350 receives a request for content access information corresponding to the request code from the user terminal 500. [

The access information provider 370 retrieves the content access information mapped to the request code provided from the user terminal 500 in the table in which the content access information is mapped according to the request code as shown in [Table 1]. Then, the access information providing unit 370 provides the retrieved content access information to the user terminal 500.

Request code

Contact Information
Request code 1

Connection information 1
Request Code 2

Connection information 2
...

12 is a flowchart illustrating a method of providing audio data using a non-audible frequency according to a preferred embodiment of the present invention.

The audio data providing apparatus 300 generates audio data by transmitting actual data and reference data including content access information provided from the content providing apparatus 400 at an audible frequency. At this time, the audio data providing apparatus 300 generates the first audio track by loading the actual data including the content access information provided from the content providing apparatus 400 at the first non-audible frequency (S1210). Then, the audio data providing apparatus 300 generates the second audio track by loading the reference data at the second non-audible frequency (S1220). Thereafter, the audio data providing apparatus 300 may generate audio data having the first channel as the first channel and the second channel as the second channel (S1230).

Then, the audio data providing apparatus 300 provides the generated audio data to the content providing apparatus 400 (S1240).

Meanwhile, although it has been described that the second audio track generation step S1220 is performed after the first audio track generation step S1210, the present invention is not limited thereto and the order of execution may be changed according to the embodiment. Of course, the first audio track creation step S1210 and the second audio track creation step S1220 may be performed at the same time.

As described above, by outputting the audio data generated by storing the data including the content access information in the non-audible frequency band as a voice signal, various information can be transmitted through a sound that can not be heard by a person, It is possible to provide various additional services.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer apparatus is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like in the form of a carrier wave . In addition, the computer-readable recording medium may be distributed to computer devices connected to a wired / wireless communication network, and a computer-readable code may be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the appended claims.

100: data transmitting apparatus, 200: data receiving apparatus,
300: Audio data providing apparatus, 400: Content providing apparatus,
500: user terminal, 600: communication network

Claims (13)

A voice receiving unit including an audio receiving module;
A noise analyzer for analyzing the intensity of the ambient noise received through the audio receiving module;
A data receiving unit for receiving a voice signal transmitted through the non-audible frequency band through the audio receiving module; And
And a demodulator for demodulating the speech signal to obtain actual data if the strength of the speech signal received by the data receiver is greater than the intensity of the ambient noise analyzed by the noise analyzer A device for receiving data over an audible frequency. The method according to claim 1,
Wherein the demodulating unit demodulates the audio signal received by the data receiving unit so that the strength of a voice signal corresponding to each of the first non-audible frequency and the second non- If the magnitude of the ambient noise is greater than the magnitude of the ambient noise analyzed by the demodulator, demodulates the voice signal to obtain the actual data. 3. The method of claim 2,
Wherein the demodulation unit demodulates the voice signal corresponding to the first non-audible frequency by using the reference data acquired from the voice signal corresponding to the second non-audible frequency, And the data is received by the receiver. The method of claim 3,
Wherein the demodulation unit obtains 1 as actual data if a value calculated based on the presence or absence of a voice signal corresponding to the first non-audible frequency is greater than a reference value for a predetermined period of time, and if the calculated value is smaller than the reference value 0 is obtained as actual data, and the actual data is obtained in the speech signal corresponding to the first non-audible frequency in units of the predetermined period. 5. The method of claim 4,
Wherein the actual data includes a preamble and a payload,
Wherein the demodulation unit obtains the reference value through the preamble and acquires the payload from a voice signal corresponding to the first non-audible frequency through the reference value. . The method of claim 3,
Wherein the demodulation unit demodulates the speech signal corresponding to the first non-audible frequency and the second audible signal corresponding to the first non-audible frequency when the strength of the speech signal corresponding to the first non- And obtains the actual data. Analyzing the intensity of the ambient noise received through the audio receiving module;
Receiving a voice signal transmitted through the non-audible frequency band through the audio receiving module; And
And demodulating the speech signal to obtain actual data if the strength of the received speech signal is greater than the intensity of the ambient noise. 8. The method of claim 7,
Wherein in the actual data acquisition step, the strength of a voice signal corresponding to each of a first non-audible frequency and a second non-audible frequency different from a band of the first audible frequency, And if so, demodulating the voice signal to obtain the actual data. 9. The method of claim 8,
Wherein in the actual data acquiring step, the voice signal corresponding to the first non-audible frequency is demodulated based on reference data indicating whether the actual data obtained in the voice signal corresponding to the second non-audible frequency is transmitted, The method comprising the steps of: acquiring data at a first frequency; and acquiring data at a second frequency. 10. The method of claim 9,
If the value calculated on the basis of the presence or absence of a voice signal corresponding to the first non-audible frequency for a predetermined period is greater than the reference value in the actual data acquisition step, 1 is obtained as actual data and the calculated value is greater than the reference value And acquires the actual data from the speech signal corresponding to the first non-audible frequency on the basis of the predetermined period. 9. The method of claim 8,
Wherein the actual data includes a preamble and a payload,
Acquires the reference value set in advance through the preamble in the actual data acquisition step and acquires the payload from the speech signal corresponding to the first non-audible frequency through the reference value A method for receiving data over an invisible frequency. 10. The method of claim 9,
If the strength of the speech signal corresponding to each of the first non-audible frequency and the second audible frequency is greater than or equal to a preset value than the intensity of the ambient noise, Wherein the real data is obtained from a speech signal to be transmitted. A computer-readable recording medium having recorded thereon a program for causing a computer to execute one of the methods for receiving data through the audible frequency described in any one of claims 7 to 12.

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