WO2017142112A1 - Procédé de réception de signal audio de bande de fréquences audible pour faible puissance - Google Patents

Procédé de réception de signal audio de bande de fréquences audible pour faible puissance Download PDF

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Publication number
WO2017142112A1
WO2017142112A1 PCT/KR2016/001677 KR2016001677W WO2017142112A1 WO 2017142112 A1 WO2017142112 A1 WO 2017142112A1 KR 2016001677 W KR2016001677 W KR 2016001677W WO 2017142112 A1 WO2017142112 A1 WO 2017142112A1
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WO
WIPO (PCT)
Prior art keywords
signal
audio signal
frequency band
key
audio
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PCT/KR2016/001677
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English (en)
Korean (ko)
Inventor
길현배
정지환
김재영
Original Assignee
주식회사 트리니티랩
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Priority to PCT/KR2016/001677 priority Critical patent/WO2017142112A1/fr
Publication of WO2017142112A1 publication Critical patent/WO2017142112A1/fr

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding

Definitions

  • 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.
  • 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 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, ;
  • a method for receiving a low-power audio signal in an audio frequency band 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.
  • 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.
  • 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.
  • a method for receiving a low-power audio signal in an audio frequency band 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.
  • 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, .
  • 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.
  • 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.
  • 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.
  • a method for receiving low-power audio signals in an audio frequency band comprising: receiving at least one of text, video, audio, and URL information;
  • a content service 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.
  • FIG. 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.
  • 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.
  • 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.
  • 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. 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • FIG. 1 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. 1 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.
  • 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.
  • operation S 150 A plurality of key signals having different functions according to the broadcast time are generated in step S160.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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, .
  • 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).
  • 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).
  • the microphone 430 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 wireless communication network such as WI-FI, 3G, 4G, 5G, etc.
  • 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.
  • FIG. 1 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. 1 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.
  • the A / D converter 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.
  • the microphone 430 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.
  • 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.
  • 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.
  • the microcomputer 430 When the signal acquisition operation is completed, the microcomputer 430 is returned to the sleep mode to prevent waste of power consumption.
  • one or more key signal patterns are input instead of one pattern.
  • the present invention inserts key signals of various patterns into key signals of different patterns without interference or overlapping.
  • 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.
  • the mobile device 400 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.
  • 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.
  • the present invention utilizes the gyro sensor 410 to implement an audio signal recognition service with low power consumption.
  • micro-electromechanical systems (mems) type gyro sensors 410.
  • microelectromechanical system type gyro sensor 410 The principle of operation of the microelectromechanical system type gyro sensor 410 will be briefly described as follows.
  • 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.
  • the gyro sensor 410 measures the angle using a Coriolis effect.
  • 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.
  • 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.
  • 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.
  • 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.
  • the gyro sensor is installed in the mobile device 400 having functions capable of sampling in the range of 800 Hz to 8 kHz.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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.
  • 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.
  • an audio signal to which the present invention is applied has a difference that includes a modulated digital signal as a key value.
  • 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.
  • the control unit 460 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • this pattern may not be followed.
  • 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.
  • 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.
  • 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.
  • 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.

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Abstract

L'invention concerne un procédé de réception de signal audio de bande de fréquences audible pour faible puissance, qui comprend les étapes suivantes : (a) des premier et second codeurs balaient un signal d'entrée et filtrent une bande de fréquences audible ; (b) un diviseur divise le signal d'entrée en de multiples intervalles de fréquence, crée de multiples tiroirs de fréquence, et les intègre dans de multiples boîtes ; (c) les premier et second codeurs génèrent des premier et second signaux de clé à une heure de diffusion selon un intervalle de la bande de fréquences audible filtrée ; (d) les premier et second codeurs délivrent un signal audio codé en chiffrant les premier et second signaux de clé, qui sont générés par utilisation d'une variable de quantification, et en insérant les premier et second signaux de clé chiffrés dans le signal d'entrée de bande de fréquences audible ; (e) un dispositif de diffusion reçoit le signal audio codé, le convertit en signal numérique et émet le signal numérique, et un dispositif de réception reçoit le signal numérique émis, le convertit en un signal analogique et délivre le signal analogique ; (f) un dispositif mobile reçoit le signal analogique, est activé en reconnaissant un motif spécifique du signal audio codé, et détecte les premier et second signaux de clé ; et (g) un serveur reçoit les premier et second signaux de clé détectés, extrait des informations de mise en correspondance parmi des informations pré-stockées, et les transmet au dispositif mobile.
PCT/KR2016/001677 2016-02-19 2016-02-19 Procédé de réception de signal audio de bande de fréquences audible pour faible puissance WO2017142112A1 (fr)

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PCT/KR2016/001677 WO2017142112A1 (fr) 2016-02-19 2016-02-19 Procédé de réception de signal audio de bande de fréquences audible pour faible puissance

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PCT/KR2016/001677 WO2017142112A1 (fr) 2016-02-19 2016-02-19 Procédé de réception de signal audio de bande de fréquences audible pour faible puissance

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