WO2017142112A1 - Audible frequency band audio signal reception method for low power - Google Patents

Abstract

An audible frequency band audio signal reception method for low power, of the present invention, comprises the steps in which: (a) first and second encoders scan an input signal and filter an audible frequency band; (b) a splitter splits the input signal into multiple frequency intervals, creates multiple frequency drawers and packs same into multiple boxes; (c) the first and second encoders generate first and second key signals at a broadcast time according to an interval of the filtered audible frequency band; (d) the first and second encoders output an encoded audio signal by encrypting the first and second key signals, which are generated by using a quantization variable, and inserting the encrypted first and second key signals in the audible frequency band input signal; (e) a broadcast device receives the encoded audio signal, coverts same into a digital signal and transmits the digital signal, and a reception device receives the transmitted digital signal, converts same into an analog signal and outputs the analog signal; (f) a mobile device receives the analog signal, is activated by recognizing a specific pattern of the encoded audio signal, and detects the first and second key signals; and (g) a server receives the detected first and second key signals, extracts matching information among pre-stored information, and transmits same to the mobile device.

Description

Receiving method for low power of audio frequency band audio signal

In particular, the present invention relates to a method for receiving a low-power audio signal and, more particularly, to a gyro sensor built in a mobile device, which controls whether a content providing service is activated only by recognizing a specific pattern of an audio signal, To a receiving method for low power consumption of an audio frequency band audio signal which can reduce power consumption by minimizing access of a hardware module in a mobile device by inserting a signal.

One of the biggest concerns of services through mobile devices is 'minimization of power consumption'.

This is the biggest issue when designing the hardware structure of the operating system or mobile device, and it is the gateway that must be surpassed by the limits of mobile devices.

Minimizing the power consumption of the mobile service up to now simplifies the complicated way and the specific information is stored in the storage module of the application itself for the minimum connection to the mobile hardware, It was a form of reducing frequency.

However, the conventional technology has an increase in the capacity of the application itself and a frequent update of the information of the service, which tends to increase the amount of work that the user actually has to do, and causes a small amount of power leakage. On the other hand, It also became the main cause of processor heat.

Further, there are limitations that cause various errors such as a malfunction of a mobile device or an abrupt application off (OFF).

It is an object of the present invention to provide a gyro sensor built in a gyro sensor without a separate additional device in a mobile device to control activation of a content providing service only by recognizing a specific pattern according to frequency resonance of an audio signal, And to provide a receiving method for a low power of an audio frequency band audio signal capable of minimizing power consumption by eliminating and restoring it from a ranking.

It is another object of the present invention to provide a receiving method for a low-power audio signal of an audible frequency band which can prevent leakage of unnecessary power consumption by minimizing access of a hardware module in a mobile device by inserting one or more key signals into an audio signal of an audible frequency band .

According to another aspect of the present invention, there is provided a low-power receiving method for an audio frequency band audio signal including a gyro sensor, a controller, a microphone and a decoder, a first and a second encoder, a divider, A receiving method of a low power receiving system for an audio signal having an encoding apparatus including first and second codecs, the method comprising: (a) scanning an input signal by first and second encoders to filter an audible frequency band; (b) dividing the input signal into a plurality of frequency sections to generate a plurality of frequency drawers, and packaging the plurality of frequency drawers into a plurality of boxes; (c) generating first and second key signals in accordance with the broadcast time according to the interval of the audible frequency band in which the first and second encoders are filtered; (d) encrypting the first and second key signals generated by the first and second encoders using the quantization parameters, inserting the encrypted first and second key signals into the input signal in the audio frequency band, ; (e) converting the encoded audio signal into a digital signal and transmitting the encoded audio signal, and converting the received digital signal into an analog signal and outputting the converted digital signal; (f) receiving the analog signal and recognizing a specific pattern of the encoded audio signal and activating the mobile device to detect the first and second key signals; And (g) extracting matched information from information stored in the server by receiving the first and second detected key signals, and transmitting the extracted information to the mobile device.

According to another aspect of the present invention, there is provided a method for receiving a low-power audio signal in an audio frequency band, the method comprising: generating the first key signal for a device trigger by the first encoder; And the second encoder generates the second key signal for transmitting content information with a predetermined time difference from the first encoder.

In order to achieve the above object, the step (d) of the low power receiving method of an audio frequency band audio signal of the present invention is characterized in that the first combiner applies the divided input signal and the generated first key signal, Outputting an audio signal into which a first key signal is inserted; The first codec receiving the first key signal and the first compressed audio signal; Coupling the second compressed signal to the first compressed signal and inserting the second compressed signal; And outputting the encoded audio signal by performing second compression on the audio signal in which the first and second key signals are inserted, by the second codec.

In order to attain the above object, in the step (f) of the low power receiving method for an audio frequency band audio signal of the present invention, the gyro sensor receives the analog signal and the axis is vibrated according to frequency resonance to recognize the specific pattern step; Determining whether the recognized specific pattern is the same as a pattern stored in the storage unit, and activating the mobile device in a wakeup mode if it is the same; The microphone is turned on in response to the activation to convert the applied analog signal into a digital signal; And receiving the converted digital signal and detecting the first and second key signals through a built-in detection algorithm.

According to another aspect of the present invention, there is provided a method for receiving a low-power audio signal in an audio frequency band, the method including the steps of: step; Storing the specific pattern excluded in the priority order in the backup area of the storage unit; And restoring the specific pattern stored in the backup area to the storage area after a predetermined time elapses and restoring the priority to the priority.

In order to attain the above object, the mobile device of the low-power receiving method of an audio frequency band audio signal of the present invention is deactivated when the recognized specific pattern is not the same as the previously stored pattern, .

In order to attain the above object, the present invention provides a method of receiving low frequency power of an audio frequency band audio signal, comprising the steps of: And analyzing the received signal.

In order to achieve the above object, the gyro sensor of the low power receiving method of an audio frequency band audio signal of the present invention is characterized by being a microelectromechanical system type.

In order to achieve the above object, the first and second compressions of the low power receiving method of an audio frequency band audio signal according to the present invention are characterized in that they are irreversible compression methods.

According to another aspect of the present invention, there is provided a method for receiving low-power audio signals in an audio frequency band, the method comprising: receiving at least one of text, video, audio, and URL information;

Specific details of other embodiments are included in the " Detailed Description of the Invention " and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and / or features of the present invention and the manner of achieving them will be apparent by reference to various embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the configurations of the embodiments described below, but may be embodied in various other forms, and each embodiment disclosed in this specification is intended to be illustrative only, It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the present invention, when a content service is provided to a mobile device, a large amount of mobile data is consumed, heat generated by a key signal detection algorithm or program operation is minimized, and power consumption is reduced.

In addition, it is possible to prevent power leakage even in the case of increasing the capacity of the application itself of the content providing service and updating the information with a high frequency, and to prevent various errors such as malfunction of the mobile device or sudden application off.

1 is a block diagram of a system for implementing a low power receiving method of an audio frequency band audio signal according to the present invention.

2 is an internal configuration diagram of the gyro sensor 410 in the low power receiving system of the audio signal shown in FIG.

FIG. 3 is a diagram illustrating an operation principle of the gyro sensor 410 in the low power receiving system of the audio signal shown in FIG.

FIG. 4 is a table of relative amplitude values of the x, y, and z axes for key signals stored in the storage unit 450 of the mobile device 400 in the low power receiving system of the audio signal shown in FIG.

FIG. 5 is a diagram illustrating a driving method of the microelectromechanical system type gyro sensor 410 in the low power receiving system of the audio signal shown in FIG.

6 is a block diagram showing a plurality of boxes 710 to 730 and a plurality of frequency drawers 711 divided in the encoding apparatus 100 in the low power receiving system of the audio signal shown in FIG.

FIG. 7 is a diagram of a plurality of key signal strings inserted into an audio signal for a specific time in the encoding apparatus 100 in the low power receiving system of the audio signal shown in FIG.

FIG. 8 is a timing diagram showing an operation of activating the microphone 430 in the mobile device 400 according to the plurality of first key signals Kn shown in FIG.

9 is a flowchart showing the operation of the low power receiving method of an audio frequency band audio signal according to the present invention.

FIG. 10 is a flowchart showing detailed operations of steps (S160 to S170) during operation of the low power receiving method of the audio frequency band audio signal shown in FIG.

Hereinafter, a method of receiving a low-power audio signal of an audio frequency band according to the present invention will be described with reference to the accompanying drawings.

Before describing the present invention in detail, terms and words used herein should not be construed in an ordinary or dictionary sense and should not be interpreted unconditionally, and in order for the inventor of the present invention to explain his invention in the best way It is to be understood that the concepts of various terms can be properly defined and used, and further, these terms and words should be interpreted in terms of meaning and concept consistent with the technical idea of the present invention.

That is, the terms used herein are used only to describe preferred embodiments of the present invention, and are not intended to specifically limit the contents of the present invention, It should be noted that this is a defined term.

Also, in this specification, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise, and it should be understood that they may include singular do.

Where an element is referred to as " comprising " another element throughout this specification, the term " comprises " does not exclude any other element, It can mean that you can do it.

Further, when it is stated that an element is " inside or connected to " another element, the element may be directly connected to or in contact with the other element, A third component or means for fixing or connecting the component to another component may be present when the component is spaced apart from the first component by a predetermined distance, It should be noted that the description of the components or means of 3 may be omitted.

On the other hand, it should be understood that there is no third component or means when an element is described as being "directly connected" or "directly connected" to another element.

Likewise, other expressions that describe the relationship between the components, such as "between" and "immediately", or "neighboring to" and "directly adjacent to" .

In this specification, terms such as "one side", "other side", "one side", "other side", "first", "second" Is used to clearly distinguish one element from another element, and it should be understood that the meaning of the element is not limited by such term.

It is also to be understood that terms related to positions such as "top", "bottom", "left", "right" in this specification are used to indicate relative positions in the drawing, Unless an absolute position is specified for these positions, it should not be understood that these position-related terms refer to absolute positions.

Furthermore, in the specification of the present invention, the terms "part", "unit", "module", "device" and the like mean a unit capable of handling one or more functions or operations, Or software, or a combination of hardware and software.

In this specification, the same reference numerals are used for the respective components of the drawings to denote the same reference numerals even though they are shown in different drawings, that is, the same reference numerals throughout the specification The symbols indicate the same components.

In the drawings attached to the present specification, the size, position, coupling relationship, and the like of each constituent element of the present invention may be partially or exaggerated or omitted or omitted for the sake of clarity of description of the present invention or for convenience of explanation May be described, and therefore the proportion or scale may not be rigorous.

Further, in the following description of the present invention, a detailed description of a configuration that is considered to be unnecessarily blurring the gist of the present invention, for example, a known technology including the prior art may be omitted.

FIG. 1 is a block diagram of a system for implementing a low power receiving method for an audio frequency band audio signal according to the present invention. The encoding apparatus 100, the broadcasting apparatus 200, the receiving apparatus 300, the mobile apparatus 400, And a server 500.

The encoding apparatus 100 includes a key signal generating unit 110 and a key signal inserting unit 120. The key signal generating unit 110 includes a first encoder 112 and a second encoder 114, The key signal inserting unit 120 includes a divider 121, a first coupler 122, a first codec 124, a second coupler 126, and a second codec 128.

The mobile device 400 includes a gyro sensor 410, a detection algorithm 420, a microphone 430, a decoder 440, a storage unit 450, and a control unit 460.

FIG. 2 is an internal configuration diagram of the gyro sensor 410 in the low power receiving system of the audio signal shown in FIG. 1, and includes a fixing portion 411, a detection arm 412, and a driving arm 413.

FIG. 3 is a diagram illustrating an operation principle of the gyro sensor 410 in the low power receiving system of the audio signal shown in FIG.

FIG. 4 is a table of relative amplitude values of the x, y, and z axes for key signals stored in the storage unit 450 of the mobile device 400 in the low power receiving system of the audio signal shown in FIG.

FIG. 5 is a diagram illustrating a driving method of the microelectromechanical system type gyro sensor 410 in the low power receiving system of the audio signal shown in FIG.

6 is a block diagram showing a plurality of boxes 710 to 730 and a plurality of frequency drawers 711 divided in the encoding apparatus 100 in the low power receiving system of the audio signal shown in FIG.

FIG. 7 is a diagram of a plurality of key signal strings inserted in an audio signal for a specific time in the encoding apparatus 100 in the low power receiving system of the audio signal shown in FIG. 1, in which a plurality of first key signals Kn and a plurality Number of second key signals Ks.

FIG. 8 is a timing diagram showing an operation of activating the microphone 430 in the mobile device 400 according to the plurality of first key signals Kn shown in FIG.

9 is a flowchart showing the operation of the low power receiving method of an audio frequency band audio signal according to the present invention.

FIG. 10 is a flowchart showing detailed operations of steps (S160 to S170) during operation of the low power receiving method of the audio frequency band audio signal shown in FIG.

The operation of the low power receiving method of an audio frequency band audio signal according to the present invention will now be described with reference to FIGS. 1 to 10. FIG.

The encoding device 100 scans an input signal by a digital signal processing method (S110) and filters an audible frequency band (S120).

The divider 121 divides the input signal into a plurality of frequency sections to generate a plurality of frequency drawers 711 in step S130 and combines the plurality of frequency drawers 711 in a predetermined number to form a plurality of boxes 710 To 730 (S140).

The divider 121 selects a frequency drawer that minimizes deterioration of a plurality of key signals among the generated plurality of frequency drawers 711 in operation S150 and outputs the key signal to the key signal generator 110. In operation S 150, A plurality of key signals having different functions according to the broadcast time are generated in step S160.

Here, the detailed operation of generating a plurality of key signals having different functions and inserting them into an audio signal is as follows.

The first encoder 112 generates the first key signal for the device trigger (S161), and the second encoder 114 generates the second key signal for content information transfer with a predetermined time difference from the first encoder 112 (S162).

The predetermined time is obtained by combining the first key signal generated by the first encoder 112 with an input signal externally applied from the first combiner 122 (S171) Is inserted and the first compression (S172) is performed in the first codec 124. [

Herein, the input signal means a larger category of signal including the content signal.

The second combiner 126 receives and combines the first compressed first key signal insertion audio signal from the first codec 124 and the second key signal generated by the second encoder 114 (S173) When the inserted audio signal is output, the second codec 128 compresses the combined multi-key signal embedded audio signal in a second compression manner and outputs the compressed audio signal (S174).

At this time, the first and second compressions are provided to the mobile device 400 by digitizing the first and second compressions using a non-reversible compression method in order to prevent security or data erasure from the outside.

Here, the irreversible compression method refers to a lossy compression method, and is also referred to as an MPEG compression method in the form of a compression of an MP3 file that is often used when a sound source file is discussed.

This compression method is a compression method that reduces the size of a file by applying a loss to the original data.

The human ear is insensitive to low-band sounds and is most sensitive to mid-band sounds.

For high-band sounds that exceed the middle band, they are more sensitive than low-band, but they are less sensitive than middle-band.

In the irreversible compression method, the above-mentioned characteristic of the human ear is used to set the dB in advance for each frequency, and only the sound of the audible frequency band audible to the human ear is selected, .

In addition, even if a different compression scheme (e.g., wav) is applied to the first and second codecs 324 and 328, the already inserted key signal is not altered or eliminated.

Meanwhile, the key signal generator 110 encrypts the generated key signal using a quantization parameter (S160), inserts the encrypted key signal into the input signal of the audio frequency band, and outputs an encoded audio signal (S170).

The broadcast apparatus 200 receives an encoded audio signal output from the encoding apparatus 100 and transmits the encoded audio signal in a streaming transmission mode. The receiving apparatus 300 having the built-in speaker receives the digitally encoded audio signal transmitted from the broadcast apparatus 200, converts the received digital encoded audio signal into an analog signal, and outputs the analog signal.

An operation in which the mobile device 400 receives an analog signal from the receiving device 300 and recognizes a specific pattern of the encoded audio signal and is activated and detects the first and second key signals is as follows.

The mobile device 400 receives the encoded audio signal, which is an analog signal, from the server 200, and the built-in gyro sensor 410 recognizes the specific pattern by vibrating the axis according to the frequency resonance of the audio signal (S180).

The control unit 460 in the mobile device 400 compares the recognized specific pattern with the pattern stored in the storage unit 450 to determine whether the specific pattern is the same (S190).

(S200), the mobile device 400 is activated in the wakeup mode in the sleep mode (S210), and the microphone 430, which is a kind of the A / D converter 410, is turned on S220). If not, the mobile device 400 is deactivated and the sleep mode is maintained (S215).

After the microphone 430 receives the audio signal including the key signal and converts it into a digital signal (S230), the microphone 430 and access to the application processor are blocked.

The decoder 440 receives the converted digital audio signal and detects the first and second key signals through a built-in detection algorithm 470 or a software development kit (S240).

The server 500 receives the second key signal detected from the mobile device 400 through the wireless communication network such as WI-FI, 3G, 4G, 5G, etc. and receives the second key signal Extracts information such as text, video, audio, and URL matched with the content.

The mobile device 400 receives information such as text, video, audio, and URL extracted from the server 500 and outputs the information to the user.

The detailed operation of the low power receiving method of the audio frequency band audio signal according to the present invention will be described with reference to FIGS. 1 to 10. FIG.

In addition to the method in which the A / D converter relies on the digital signal transmitted to the circuitry of the mobile device 400, the A / D converter further receives the digital content including the key signal, detects the key signal, Thereby activating the providing mobile device 400.

Further, it is not necessary to always activate the microphone 430 as in general audio signal utilization services of the mobile device 400 having an A / D converter capable of receiving an audio signal, and it is not necessary to determine whether the audio signal is an audio signal Activate or deactivate the service whether or not it is.

To this end, the microphone 430 in the mobile device 400 is activated by using the property of the gyro sensor 410, which is one of the sensors required for the smart devices, and a service available only for audio signal recognition is provided to the user with low power do.

That is, access to various modules of the mobile device 400 is minimized for the low power problem that must be overcome in the mobile service, and the information is acquired only by the module when necessary.

In order to provide information related to the contents through the audio signal processing, the present invention wakes up the microphone 430, which is the A / D converter of the mobile device 400, according to the timing at which the audio signal including the key signal is broadcasted, It accepts.

When the signal acquisition operation is completed, the microcomputer 430 is returned to the sleep mode to prevent waste of power consumption.

To this end, in generating and inserting a key signal into an audio signal in an audio frequency band, one or more key signal patterns are input instead of one pattern.

Although it is possible to provide various information or advertisement delivery by only one key signal pattern, it is possible to minimize the access of the hardware module in the mobile device 400 or the mobile device 400 for executing the algorithm for acquiring and detecting the digital signal, It is free from the problem of leakage, and consumers will recognize the service as a good service.

The present invention inserts key signals of various patterns into key signals of different patterns without interference or overlapping.

That is, the first pattern serves to awaken the mobile device 400 in the sleep mode. The first pattern transmits a signal of a specific pattern to the gyro sensor 410 of the mobile device 400, And activates the audio input device if it is the same as the pattern stored in the storage unit 450 in advance.

The second pattern is detected by the key signal detection algorithm 470 or the detection module in which the program is installed, and transmits additional information or advertisement information about the corresponding content that matches the information of the key signal.

The third pattern serves to remotely control the associated smart device through the wireless communication with the mobile device 400. [

The gyro sensor 410 used in the first pattern is a very sensitive sensor that recognizes a specific range of an audio signal and induces a calculation of a result according to a specific pattern that can be regarded as noise.

That is, manufacturers of gyro sensors generally think that such noise is an element that interferes with the measurement of the audio signal, but the present invention utilizes it as a wake up signal for audio signal recognition.

When the frequency resonance of the audio signal vibrates the axis of the gyro sensor 410 built in the mobile device 400, the mobile device 400 recognizes the specific pattern and activates it if it is the same as the stored pattern, 450 or the detection algorithm 470 already installed in the program.

That is, the mobile device 400 receives the encoded audio signal, which is an analog signal, from the receiving device, and the built-in gyro sensor 410 recognizes the specific pattern by vibrating the axis according to the frequency resonance of the audio signal.

The control unit 460 in the mobile device 400 compares the recognized specific pattern with the pattern stored in the storage unit 450 and activates the mobile device 400 in the wakeup mode according to whether the pattern is the same or not, , The mobile device 400 is inactivated to maintain the sleep mode, thereby minimizing the access of the hardware module in the mobile device 400, thereby preventing waste of power consumption.

On the other hand, neither the operating system of iOS nor the operating system of Android, which occupies most of the recent mobile smartphone market, does not prevent access to the gyro sensor 410.

Accordingly, the present invention utilizes the gyro sensor 410 to implement an audio signal recognition service with low power consumption.

Inside the mobile devices we commonly use are all built-in micro-electromechanical systems (mems) type gyro sensors 410.

The principle of operation of the microelectromechanical system type gyro sensor 410 will be briefly described as follows.

2, the microelectromechanical system type gyro sensor 410 has a rectangular shaped fixed portion 411 at its center, and a detection arm 412 is provided on two corresponding sides of the fixed portion 411, And a driving arm 413 is attached in an H beam shape to the other two corresponding sides of the fixing portion 411. [

As shown in FIGS. 3 and 4, the gyro sensor 410 measures the angle using a Coriolis effect.

When the gyro sensor 410 having a predetermined mass moves in the V direction and each rotation speed is applied, the mass is subjected to a force in the direction of the dotted arrow as a result of the Coriolis force.

The resulting physical displacement generated by the Coriolis force, which is a force acting perpendicular to the direction of motion of the object, can be calculated from the capacitive sensing structure.

That is, when a sensor is operated, a predetermined oscillation circuit applies a AC oscillating electric field to the drive arm 413 to thereby cause the drive arm 413 to vibrate in the left and right direction at all times. So that it is possible to secure a stable zero point.

If a rotational force is applied to the sensor from the outside, the drive arm 413 continues to move leftward and rightward, but the coriolis force is applied, so that vertical vibration is generated.

Accordingly, when one side of the vibration arm moves upward, the other side of the vibration arm moves down. When the vibration arm vibrates up and down, a rotating force is transmitted to the fixing unit 411 as well.

The detection arm 412, which has been stopped while the fixed portion 411 rotates due to the transmitted rotation force, starts to vibrate from side to side, and the vibration of the detection arm 412 is converted into a change of current to detect the vibration.

At this time, after the detected current is amplified and the waveform is corrected, the vibration phase of the drive arm 413 is delayed by 90 degrees and compared with the vibration waveform of the detection arm 412, thereby detecting the angular velocity of the rotation applied to the sensor.

At this time, after the output of the detected angular velocity is corrected, a voltage proportional to the angular velocity is outputted.

Generally, the gyro sensor is installed in the mobile device 400 having functions capable of sampling in the range of 800 Hz to 8 kHz. In order to prevent leakage of power of the mobile device 400, the gyro sensor is involved in the operation of the mobile device 400 The operating system limits the sampling frequency of the above range to a level at which no problem occurs in application utilization.

Since the gyro sensor 410 is a sensor having a capability of recognizing the direction, it is possible to store the pattern recognition for all the axes x, y, and z in advance in the storage unit 450, There should be no problem recognizing the pattern whether it is placed or not.

Accordingly, the present invention generates a key signal in the encoding device 100 and inserts it into the input signal, measures the relative amplitudes of the x, y, and z axes of the inserted key signal, Save it in advance.

In Figure 4, the shaded portion is the amplitude value that the gyro sensor 410 should recognize, among the relative amplitude values of the x, y, and z axes of the respective input audio signal directly to the embedded key signal.

5, the reason why the z axis has two variables is that the x axis is the rolling motion mode in the M2 and M4 directions and the y axis is the pitching (pitching) mode in the driving method of the microelectromechanical system type gyro sensor 410. [ ) Motion mode in the M1 and M3 directions, and the z-axis is the yawing motion mode, which is a direction three-dimensionally perpendicular to the x- and y-axes.

The present invention also considers the operation of rotating about the x-axis or the y-axis.

The gyro sensor 410 with this operating principle is set to detect 200 movements per second (200 hz for Android and 100 hz for iOS).

In this case, the first key signal for triggering is inserted into the 20-200 Hz audio band, the gyro sensor 410 guides the user to find a specific pattern, and when the pattern is found, the microphone 430 turns And the low-power audio signal utilizing service is implemented by collecting audio signals.

It is determined whether the service is activated or deactivated by only the continuous audio signal transmitted in the unspecified space provided with the equipment for outputting the audio signal to the mobile device 400 in the standby state without an additional device.

If the service is activated, a module capable of receiving an audio signal, such as the microphone 430, is activated to convert the received audio signal to digital, and statistical analysis is actively performed to apply the service.

If the service is inactivated, it is kept in standby mode continuously. Thus, the power consumption of the corresponding service can be reduced.

At this time, a pattern in which a low frequency signal is used to operate the gyro sensor 410 and the same pattern is displayed with a specific period is referred to as a pattern.

An audio signal is a signal that includes both an analog element and a digital element, and utilizes an audio signal transmitted through an electrical output device such as a speaker that outputs an audio signal to the outside.

An audio signal includes an audible frequency band or a signal other than a signal that can be immediately heard and recognized.

Unlike a general audio signal, an audio signal to which the present invention is applied has a difference that includes a modulated digital signal as a key value.

As shown in FIG. 7, the key is not inserted into the audio signal of all time zones, but the key is inserted freely in a specific pattern for a specific time.

The key is concealed inside the audio signal unrecognizable by the human hearing, is revealed through digitization through the audio signal receiving device included in the computing device, and is hidden again in the analog state.

The key referred to in this technique is divided into a first key signal (Kn) for noise and a second key signal (Ks) for service application, and is included in the audio signal.

The first key signal Kn periodically appears as a trigger signal that can transmit a specific pattern to the gyro sensor 410 to instruct the user to prepare to receive an audio signal.

The second key signal Ks is a key that is completely different from the first key signal Kn. The second key signal Ks is a system key according to the first key signal Kn. The audio signal receiving device, such as the microphone 430, The pattern is exposed when converting, and the service is judged according to this pattern.

The key may have a single key or multiple keys.

The key may be located lower or higher than the frequency band used by the input signal.

The first key signal Kn is generally present as a threshold for driving the device of the mobile device 400.

The key signal Kn can be applied to a mobile settlement area through non-contact or contact in the future.

The second key signal (Ks) modulating the digital signal may include a direct position or information on the image content.

The key itself is encrypted and can not be determined by pattern analysis alone.

A filter (not shown) for analyzing the cipher may be additionally present in the analysis of the pattern stored in the storage unit 450 and the input pattern.

When the specific pattern is matched and activated, the pattern contributed to the activation is prevented from being performed twice by the control unit 460 in the same pattern except for the priority of the pattern comparison step, thereby reducing unnecessary power consumption.

And an error detection process of whether or not the key value is received.

If the key value is detected and the integrated circuits and programs of the mobile computing device operate accordingly to derive the resultant value, the pattern of the key value is stored in the storage unit 450, which is stored in advance for statistical comparison of patterns, And all processes are disabled.

That is, when the key value is detected and reacted, the deactivation condition is satisfied at the same time, so that the inactivation algorithm works together with the activation process.

In this algorithm, the control unit 460 restores the pattern that is excluded from the priority order through deactivation to a higher priority after a predetermined time is applied through the program.

In the case of the first key signal Kn, if the reaction pattern of the gyro sensor 410 according to the vibration is input in advance and the pattern is a pattern corresponding to the first key signal Kn applied to the reaction pattern of the gyro sensor 410, As shown, the audio signal receiving unit such as the microphone 430 or the receiving module is activated to perform the pattern analysis.

The first key signal Kn corresponds to a starting point for preparing a necessary integrated circuit to inform the mobile device that the second key signal Ks will be included in implementing the service model through the audio signal in the mobile device 400.

The first key signal Kn and the second key signal Ks are present in the signal in an alternating manner. However, in order to apply the new second key signal Ks, the driving of the mobile device 400 The first key signal Kn is preapplied to activate devices and programs capable of receiving and analyzing audio signals.

The first key signal Kn is applied with patterns of wireless communication networks such as LTE and 3G.

In particular, LTE has a pattern considering the auxiliary antenna portion.

The pattern includes both the type of frequency and the response of the internal program.

The computing device referred to in the present invention includes all computing devices having gyro sensors 410 with audio receiving devices.

The operation according to the two keys of the first key signal Kn and the second key signal Ks is thoroughly performed through a program prepared in accordance with the operating system or the program platform of the corresponding computing device.

The program controls both the application processor and the storage unit of the mobile device 400 during the driving process.

The storage unit 450 has at least two areas.

One has a space in which the reference pattern is stored and a space in which the reference pattern is backed up.

These patterns are separately stored and backed up into two patterns of the first key signal Kn and the second key signal Ks.

In the case of the second key signal Ks, the reference pattern applied through the low-power audio signal reception program is moved from the storage area to the backup area.

The pattern is transferred and stored in the backup area of the storage unit 450, and the active state is shifted to the inactive state.

When a specified time has passed, the pattern stored in the backup area is moved to the storage area again, and the preparation for activating the computing device for the pattern is performed again.

In the case of the first key signal Kn, this pattern may not be followed.

This is because the first key signal Kn participates in the simple on / off operation of the audio signal receiving unit of the mobile computing device, so that even if the same pattern is repeatedly received, no problem is caused in the entire system.

The first key signal Kn has one or more various patterns.

The input signal is converted into a modulated audio signal including a key value through an encoding device and transmitted to an audio signal output device such as a speaker.

The first key signal Kn and the second key signal Ks are respectively produced in the audio signal modulation and are coupled to the most suitable drawer among the drawers in the divided boxes 710 to 730 through the divider.

Since the first key signal Kn and the second key signal Ks do not interfere with each other, they do not exist at the same time on the time line.

As described above, according to the present invention, a built-in gyro sensor without a separate additional device in a mobile device controls whether or not to activate a content providing service by only recognizing a specific pattern according to frequency resonance of an audio signal, Power consumption of an audio frequency band audio signal capable of minimizing power consumption by eliminating and recovering from a priority order.

The present invention also provides a method for receiving a low-power audio signal of an audible frequency band by minimizing access of a hardware module in a mobile device by inserting one or more key signals into an audio signal of an audible frequency band, thereby preventing leakage of unnecessary power consumption.

Accordingly, the present invention can minimize the heat generated by a large amount of mobile data consumption, a key signal detection algorithm, and a program operation when a content service is provided to a mobile device, and reduce power consumption.

In addition, it is possible to prevent power leakage even in the case of increasing the capacity of the application itself of the content providing service and updating the information with a high frequency, and to prevent various errors such as malfunction of the mobile device or sudden application off.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. It will be understood by 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 as defined by the appended claims.

In addition, since the present invention can be embodied in various other forms, the present invention is not limited by the above description, and the above description is intended to be a complete description of the present invention, It will be understood by those of ordinary skill in the art that the present invention is only provided to fully inform the person skilled in the art of the scope of the present invention and that the present invention is only defined by the claims of the claims.

Claims (10)

A low power receiving system for an audio signal comprising a mobile device including a gyro sensor, a control, a microphone and a decoder and an encoding device including first and second encoders, a divider, first and second combiners, first and second codecs The method comprising: (a) the first and second encoders scan an input signal to filter an audible frequency band; (b) dividing the input signal into a plurality of frequency sections to generate a plurality of frequency drawers, and packaging the plurality of frequency drawers into a plurality of boxes; (c) generating the first and second key signals according to the broadcast time according to the interval of the filtered audible frequency band, the first and second encoders generating the first and second key signals; (d) the first and second encoders encrypt the generated first and second key signals using a quantization parameter, and transmit the encrypted first and second key signals to the input signal in the audio frequency band Outputting an encoded audio signal by inserting the encoded audio signal; (e) converting the encoded audio signal into a digital signal and transmitting the encoded audio signal, and converting the received digital signal into an analog signal and outputting the converted digital signal; (f) receiving the analog signal and recognizing a specific pattern of the encoded audio signal to be activated and detecting the first and second key signals; And (g) extracting matching information among information stored in the server by receiving the detected first and second key signals, and transmitting the extracted information to the mobile device; Wherein the audio signal is a low frequency audio signal. The method according to claim 1, The step (c) The first encoder generating the first key signal for a device trigger; And The second encoder generating the second key signal for content information transfer with a predetermined time difference from the first encoder; Wherein the audio signal is a low frequency audio signal. 3. The method of claim 2, The step (d) The first combiner applying the divided input signal and the generated first key signal and outputting an audio signal in which the first key signal is inserted; The first codec receiving the first key signal and the first compressed audio signal; Coupling the second compressed signal to the first compressed signal and inserting the second compressed signal; And The second codec receiving an audio signal in which the first and second key signals are inserted and performing second compression to output the encoded audio signal; Wherein the audio signal is a low frequency audio signal. The method according to claim 1, The step (f) The gyro sensor receiving the analog signal and vibrating the shaft according to frequency resonance to recognize the specific pattern; Determining whether the recognized specific pattern is the same as a pattern stored in the storage unit, and activating the mobile device in a wakeup mode if it is the same; The microphone is turned on in response to the activation to convert the applied analog signal into a digital signal; And The decoder receiving the converted digital signal and detecting the first and second key signals through a built-in detection algorithm; Wherein the audio signal is a low frequency audio signal. 5. The method of claim 4, When activated Excluding the specific pattern contributed to the activation from the priority of the pattern comparison object stored in the storage area of the storage unit; Storing the specific pattern excluded in the priority order in the backup area of the storage unit; And The control unit restores the specific pattern stored in the backup area to the storage area after a predetermined time elapses and restores the priority to the priority; Lt; RTI ID = 0.0 > 1, < / RTI & A method for receiving an audio signal of an audio frequency band for a low power. 5. The method of claim 4, The mobile device And when the recognized specific pattern is not the same as the previously stored pattern, it is inactivated to maintain the sleep mode. A method for receiving an audio signal of an audio frequency band for a low power. 5. The method of claim 4, The step of determining whether or not they are the same The filter interpreting the recognized specific pattern of ciphers for the encrypted first and second key signals; Lt; RTI ID = 0.0 > 1, < / RTI & A method for receiving an audio signal of an audio frequency band for a low power. 5. The method of claim 4, The gyro sensor Characterized in that it is of the microelectromechanical system type. A method for receiving an audio signal of an audio frequency band for a low power. The method of claim 3, The first and second compression Characterized in that it is a non- A method for receiving an audio signal of an audio frequency band for a low power. The method according to claim 1, The matched information is Text, video, audio, and URL information. A method for receiving an audio signal of an audio frequency band for a low power.

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