Patent Publication Number: US-2022225054-A1

Title: Electronic device for measuring posture of user and method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation of International Application No. PCT/KR2022/000564, filed on Jan. 12, 2022, which claims priority to Korean Patent Application No. 10-2021-0004523, filed on Jan. 13, 2021 in the Korean Intellectual Property Office, the disclosures of which are herein incorporated by reference. 
    
    
     TECHNICAL FIELD 
     One or more embodiments disclosed herein generally relate to an electronic device and, for example, to technology for receiving sensor information from an external electronic device and generating user posture and movement information. 
     BACKGROUND ART 
     Wearable electronic devices that can be directly worn on human bodies have recently been developed. For example, wearable electronic devices may be configured such that they can be attached to/detached from parts of human bodies or clothes, as in the case of true wireless stereo (TWS) headphones and head-mounted devices (HMDs). 
     Stereophonic sound refers to a method for providing sound by using multiple sound output elements such that two or more independent sound channels are used. Audio data may include stereo sound information, and respective independent sound channels may be used such that multiple sound output elements output different sound, respectively, so that the listener hears a stereo sound image. 
     User position information or user posture information may be necessary to provide the user with proper spatial impression. A wearable device may be attached to a part of the user&#39;s body and used to measure the user&#39;s posture. However, when the wearable device and a cooperating electronic device are used to provide the user with the spatial impression, posture measurement may be delayed to some extent depending on the measurement process, communication status, or the like. Such a delay may make instantaneous responses to changes in the user&#39;s posture difficult. 
     SUMMARY 
     An electronic device according to an embodiment disclosed herein may include a sensor, a short-range communication module configured to perform short-distance communication with an external electronic device, and a processor operatively connected to the short-range communication module, wherein the processor is configured to generate first rotation angle information by using the sensor, establish a connection to the external electronic device by using the short-range communication module, receive, from the external electronic device, second rotation angle information and check data uniquely assigned to the second rotation angle information, configure a first time stamp based on the check data and a time of receiving the second rotation angle information, configure a second time stamp based on the check data and a time of correcting the second rotation angle information, compare the first time stamp and the second time stamp to calculate a delay time from the time of receiving the second rotation angle information to the time of correcting the second rotation angle information, correct the second rotation angle information based on the delay time, and generate posture information based on the first rotation angle information and the corrected second rotation angle information. 
     A method for providing three-dimensional sound by an electronic device according to an embodiment disclosed herein may include generating first rotation angle information, establishing a connection to an external electronic device, receiving second rotation angle information and check data uniquely assigned to the second rotation angle information from the external electronic device, configuring a first time stamp based on a time of receiving the second rotation angle information and the check data, configuring a second time stamp based on a time of correcting the second rotation angle information and the check data, comparing the first time stamp and the second time stamp to calculate a delay time from the time of receiving the second rotation angle information to the time of correcting the second rotation angle information, correcting second rotation angle information based on the delay time, and generating posture information based on the first rotation angle information and the corrected second rotation angle information. 
     An electronic device according to an embodiment disclosed herein may include a short-range communication module configured to perform short-distance communication with an external electronic device, a sensor for sensing a rotation angle of the electronic device, and a processor operatively connected to the short-range communication module and the sensor, wherein the processor is configured to generate rotation angle information regarding the rotation angle of the electronic device, by using the sensor, generate check data uniquely assigned to the rotation angle information in response to generating the rotation angle information, and transmit the rotation angle information and the check data to the external electronic device by using the short-range communication module. 
     Certain embodiments provide a method for predicting the user&#39;s head motion by using wearable electronic device sensor information, and changing the sound source according to the head movement in three-dimensional space by using the corresponding information. In addition, certain embodiments provide a method for optimizing posture information by predicting a user head movement pattern, in order to solve the problem of time delay of sensor posture information that is transferred wirelessly. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar elements. 
         FIG. 1  is a block diagram illustrating an electronic device  101  in a network environment  100  according to an embodiment. 
         FIG. 2  illustrates an example in which an electronic device and a wearable device perform wireless communication connection according to an embodiment; 
         FIG. 3  is a block diagram of an electronic device according to an embodiment; 
         FIG. 4  is a block diagram of a wearable device according to an embodiment; 
         FIGS. 5A and 5B  illustrate a three-dimensional sound service according to an embodiment; 
         FIG. 6  illustrates a user interface according to an embodiment; 
         FIG. 7  is a flowchart illustrating an operation in which an electronic device generates posture information according to an embodiment; 
         FIG. 8  illustrates functional elements and information flow of an electronic device for measuring a user&#39;s posture according to an embodiment; 
         FIG. 9  is an exemplary diagram of SPP message data according to an embodiment; 
         FIG. 10  is an exemplary diagram in which an electronic device calculates a delay time according to an embodiment; 
         FIG. 11  is a flowchart illustrating an operation in which an electronic device learns a user movement pattern according to an embodiment; 
         FIG. 12  is an exemplary diagram in which an electronic device provides a three-dimensional sound service according to an embodiment; and 
         FIG. 13  is a flowchart illustrating an operation in which an electronic device provides a three-dimensional sound service according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  is a block diagram illustrating an electronic device  101  in a network environment  100  according to various embodiments. Referring to  FIG. 1 , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or at least one of an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , memory  130 , an input 1module  150 , a sound output 1module  155 , a display 1module  160 , an audio module  170 , a sensor module  176 , an interface  177 , a connecting terminal  178 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module (SIM)  196 , or an antenna module  197 . In some embodiments, at least one of the components (e.g., the 11connecting terminal  178 ) may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In some embodiments, some of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be implemented as a single component (e.g., the display module  160 ). 11 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  coupled with the processor  120 , and may perform various data processing or computation. According to one embodiment, as at least part of the data processing or computation, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in non-volatile memory  134 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)), or an auxiliary processor  123  (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction with, the main processor  121 . For example, when the electronic device  101  includes the main processor  121  and the auxiliary processor  123 , the auxiliary processor  123  may be adapted to consume less power than the main processor  121 , or to be specific to a specified function. The auxiliary processor  123  may be implemented as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one component (e.g., the display 1module  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state, or together with the main processor  121  while the main processor  121  is in an active state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . According to an embodiment, the auxiliary processor  123  (e.g., the neural processing unit) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed, e.g., by the electronic device  101  where the artificial intelligence is performed or via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, e.g., supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-network or a combination of two or more thereof but is not limited thereto. The artificial intelligence model may, additionally or alternatively, include a software structure other than the hardware structure. 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored in the memory  130  as software, and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input 1module  150  may receive a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input 1module  150  may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen). 
     The sound output 1module  155  may output sound signals to the outside of the electronic device  101 . The sound output 1module  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record. The receiver may be used for receiving incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part of the speaker. 
     The display 1module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display 1module  160  may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display 1module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input 1module  150 , or output the sound via the sound output 1module  155  or a headphone of an external electronic device (e.g., an electronic device  102 ) directly (e.g., wiredly) or wirelessly coupled with the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     A connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the electronic device  102 ). According to an embodiment, the connecting terminal  178  may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to one embodiment, the power management module  188  may be implemented as at least part of, for example, a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently from the processor  120  (e.g., the application processor (AP)) and supports a direct (e.g., wired) communication or a wireless communication. According to an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module  196 . 
     The wireless communication module  192  may support a 5G network, after a 4G network, and next-generation communication technology, e.g., new radio (NR) access technology. The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communications (mMTC), or ultra-reliable and low-latency communications (URLLC). The wireless communication module  192  may support a high-frequency band (e.g., the mmWave band) to achieve, e.g., a high data transmission rate. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as, e.g., beamforming, massive multiple-input and multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module  192  may support various requirements specified in the electronic device  101 , an external electronic device (e.g., the electronic device  104 ), or a network system (e.g., the second network  199 ). According to an embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 Gbps or more) for implementing eMBB, loss coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of 1 ms or less) for implementing URLLC. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module  197  may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  (e.g., the wireless communication module  192 ) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module  197 . 
     According to various embodiments, the antenna module  197  may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, a RFIC disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a designated high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., the top or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals of the designated high-frequency band. 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the electronic devices  102  or  104  may be a device of a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra low-latency services using, e.g., distributed computing or mobile edge computing. In another embodiment, the external electronic device  104  may include an internet-of-things (IoT) device. The server  108  may be an intelligent server using machine learning and/or a neural network. According to an embodiment, the external electronic device  104  or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
       FIG. 2  illustrates an example in which an electronic device and a wearable device perform wireless communication connection according to an embodiment. 
     Referring to  FIG. 2 , an electronic device  210  and a wearable device  220  may be connected to each other using a wireless communication network  230 . 
     According to an embodiment, the electronic device  210  may be a device for providing wireless communication. The electronic device  210  may be, for example, a smart phone, a PC, or a tablet PC, but is not limited to these examples. The electronic device  210  may include at least part of the configuration and/or functions of the electronic device  101  of  FIG. 1 . According to an embodiment, the electronic device  210  may provide a three-dimensional sound service to a user. The three-dimensional sound service may be understood as, for example, a sound service based on the user&#39;s posture information. According to an embodiment, the three-dimensional sound service may refer to a function of controlling the output of sound according to the user&#39;s posture. According to an embodiment, the electronic device  210  may receive information related to the user&#39;s posture from the wearable device  220  in order to provide the three-dimensional sound service. The information related to the user&#39;s posture may include, for example, sensor information sensed and/or detected by a sensor included in the wearable device  220  or information regarding a result calculated by using the sensor information by the wearable device  220 . According to an embodiment, the information related to the user&#39;s posture may be information regarding the rotation angle of the wearable device  220 . According to an embodiment, the electronic device  210  may estimate, detect, or calculate the user&#39;s actual posture by using the information related to the user&#39;s posture received from the wearable device  220 . According to an embodiment, the electronic device  210  may generate posture information by using the rotation angle information received from the wearable device  220 . According to an embodiment, the electronic device  210  may generate information related to the posture of the electronic device  210  (e.g., rotation angle information of the electronic device  210 ) via a sensor (e.g., the sensor  320  of  FIG. 3 ) of the electronic device  210 . According to an embodiment, the electronic device  210  may generate information (e.g., posture information) regarding the user&#39;s relative posture with respect to the electronic device  210  based on the information related to the posture of the electronic device  210  and the user&#39;s posture-related information (e.g., rotation angle information) received from the wearable device  220 . 
     According to an embodiment, the electronic device  210  may transmit audio information to the wearable device  220  in order to provide the three-dimensional sound service. The audio information may be a voice signal or a signal obtained by digitizing the voice signal. According to an embodiment, the electronic device  210  may render audio information based on the user&#39;s posture-related information (e.g., posture information) in order to provide the three-dimensional sound service. Rendering may be understood as, for example, changing audio information based on the user&#39;s posture information generated by the electronic device  210 . According to an embodiment, the electronic device  210  may transmit audio information rendered based on the user&#39;s posture information to the wearable device  220 . 
     According to an embodiment, the wearable device  220  may be worn on a part of the user&#39;s body or may be attached or fixed to a part of clothes worn by the user. According to an embodiment, the wearable device  220  may include a first wearable device  221  and a second wearable device  222 . According to an embodiment, the first wearable device  221  and the second wearable device  222  may be connected to each other using wireless communication. According to an embodiment, each of the first wearable device  221  and the second wearable device  222  may be connected to the electronic device  210  by using the wireless communication network  230 , or only one of the first wearable device  221  and the second wearable device  220  may be wirelessly connected to the electronic device  210 . According to an embodiment, the wearable device  220  may measure, detect, and/or sense information related to the posture of the user wearing the wearable device. According to an embodiment, the wearable device  220  may generate sensor information related to the posture of the wearable device  220  via a sensor (e.g., the sensor  420  of  FIG. 4 ) included in the wearable device  220 , and may calculate information (e.g., rotation angle information) related to the posture of the user wearing the wearable device  220  by using the sensor information. According to an embodiment, the wearable device  220  may transmit the generated and/or calculated user&#39;s posture-related information to the electronic device  210 . According to an embodiment, the wearable device  220  may receive audio information from the electronic device  210  and may output sound based on the received audio information. 
     According to an embodiment, the electronic device  210  and the wearable device  220  may be connected to each other using the wireless communication network  230 . The wireless communication network  230  may be, for example, a short-range wireless communication network (e.g., the first network  198  of  FIG. 1 ). According to various embodiments, the electronic device  210  and the wearable device  220  may be connected to each other using at least one wireless communication scheme among Bluetooth, WiFi-P2P, Bluetooth low energy (BLE), and ultra-wide band (UWB). However, the wireless communication scheme is not limited to the above-described example. In certain embodiments disclosed herein, for convenience, an example in which the electronic device  210  and the wearable device  220  are connected using the Bluetooth scheme is described in a limited manner. 
       FIG. 3  is a block diagram of an electronic device according to an embodiment. 
     According to an embodiment, an electronic device  300  may include a short-range communication module  310 , a sensor  320 , a memory  330 , and a processor  340 . The electronic device  300  may include at least part of the configurations and/or functions included in the electronic device  101  of  FIG. 1  and the electronic device  210  of  FIG. 2 . 
     According to an embodiment, the short-range communication module  310  may include a software and/or hardware module (e.g., a communication processor (CP)) for wirelessly communicating with a network (e.g., the wireless communication network  230  of  FIG. 2 ) or an external electronic device (e.g., the wearable device  220  of  FIG. 2 ), and may include at least part of the configuration and/or functions of the communication module  190  of  FIG. 1 . The short-range communication module  310  may be communicatively connected to the wearable device  220  through a short-range wireless communication network (e.g., the first network  198  of  FIG. 1 ). According to an embodiment, the short-range communication module  310  may transmit data, which is provided from another element (e.g., the processor  340 ) of the electronic device  300 , to an external electronic device, or may receive data from the external electronic device and provide the received data to the other element of the electronic device  300 . 
     According to an embodiment, the sensor  320  may sense the movement of the electronic device  300 . The sensor  320  may include at least part of the configuration and/or functions of the sensor module  176  of  FIG. 1 . According to an embodiment, the sensor  320  may sense a physical quantity related to the movement of the electronic device  300  including information related to the posture of the electronic device  300 , such as the speed, acceleration, angular velocity, angular acceleration, and/or geographic location of the electronic device  300 . According to an embodiment, the sensor  320  may at least include an acceleration sensor  321  and a gyro sensor  322 . According to an embodiment, the sensor  320  may generate acceleration information of the electronic device  300  via the acceleration sensor  321 . According to an embodiment, the sensor  320  may generate angular velocity information of the electronic device  300  via the gyro sensor  322 . According to an embodiment, the sensor  320  may generate rotation angle information (e.g., first rotation angle information) of the electronic device  300  by using the acceleration information and the angular velocity information. 
     According to an embodiment, the memory  330  may store various pieces of data used by at least one element (e.g., the processor  340 ) of the electronic device  300 , and may include at least part of the configuration and/or functions of the memory  130  of  FIG. 1 . According to an embodiment, the memory  330  may store instructions executed by the processor  340 . For example, the memory  330  may store instructions for causing the processor  340  to provide the three-dimensional sound service. According to an embodiment, the memory  330  may temporarily or permanently store information (e.g., rotation angle information) required for the electronic device  300  to provide the three-dimensional sound service. 
     According to an embodiment, the processor  340  may process data within the electronic device  300 , may control at least one other element related to a function of the electronic device  300 , and may perform data processing and computation required to perform various functions. The processor  340  may include at least part of the configuration and/or functions of the processor  120  of  FIG. 1 . The processor  340  may include a microprocessor or any suitable type of processing circuitry, such as one or more general-purpose processors (e.g., ARM-based processors), a Digital Signal Processor (DSP), a Programmable Logic Device (PLD), an Application-Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), a Graphical Processing Unit (GPU), a video card controller, etc. In addition, it would be recognized that when a general purpose computer accesses code for implementing the processing shown herein, the execution of the code transforms the general purpose computer into a special purpose computer for executing the processing shown herein. Certain of the functions and steps provided in the Figures may be implemented in hardware, software or a combination of both and may be performed in whole or in part within the programmed instructions of a computer. No claim element herein is to be construed as means-plus-function elements, unless the element is expressly recited using the phrase “means for.” In addition, an artisan understands and appreciates that a “processor” or “microprocessor” may be hardware in the claimed disclosure. The processor  340  may be electrically and/or functionally connected to elements of the electronic device  300 , such as the short-range communication module  310 , the sensor  320 , and/or the memory  330 . According to an embodiment, there will be no limitations on the computation and data processing functions that the processor  340  can implement in the electronic device  300 . However, embodiments disclosed herein are used to primarily describe the function of generating the user&#39;s posture information and rendering audio information based on the generated posture information in order to provide the three-dimensional sound service. 
     According to an embodiment, the processor  340  may generate first rotation angle information. The first rotation angle information may be, for example, information regarding the rotation angle of the electronic device  300  indicating the degree of rotation of the electronic device  300 . According to an embodiment, the processor  340  may generate angular velocity information, acceleration information, and position information of the electronic device  300  by controlling the sensor  320 , and may combine and/or compute the generated angular velocity information, acceleration information, and position information to generate rotation angle information (e.g., first rotation angle information) of the electronic device  300 . The rotation angle information may be information indicating the degree at which the electronic device  300  rotates with reference to virtual three-dimensional coordinates. The rotation angle information may be expressed as an angle, and the virtual three-dimensional coordinates may be formed with reference to at least a partial area of the electronic device  300 . The rotation angle information may include at least three types of rotation angles (e.g., R value, P value, and Y value) in order to specify rotation in three dimensions. According to an embodiment, the rotation angle information may include an X-axis rotation angle (roll, R value) with reference to the X-axis, a Y-axis rotation angle (pitch, P value) with reference to the Y-axis, and a Z-axis rotation angle (yaw, Y value) with reference to the Z-axis, and the three pieces of rotation angle information may be collected as one piece of rotation angle information (e.g., yaw-pitch-roll (YPR) information). According to an embodiment, the processor  340  may continuously and/or periodically generate the first rotation angle information. 
     According to an embodiment, the processor  340  may be connected to an external electronic device (e.g., the wearable device  220  of  FIG. 2 ). The processor  340  may control the short-range communication module  310  to establish a wireless connection with the wearable device  220 . The processor  340  may transmit a signal for controlling to establish and maintain the wireless connection with the wearable device  220  using the short-range communication module  310 , and may continuously and/or periodically transmit or receive signals related to wireless connection control (e.g., a serial port profile (SPP) message) during wireless connection establishment and wireless connection performance. 
     According to an embodiment, the processor  340  may receive second rotation angle information and latency check data of the second rotation angle information. According to an embodiment, the processor  340  may receive, from the wearable device  220 , information related to the posture of the wearable device  220 , for example, second rotation angle information via the short-range communication module  310 . The processor  340  may continuously and/or periodically receive information related to the posture of the wearable device  220 , and may receive latency check data related to the sequence of the posture-related information substantially simultaneously or sequentially with the posture-related information periodically transmitted from the wearable device  220 . According to an embodiment, the latency check data is information for identifying a time period of delay between receiving data (e.g., second rotation angle information) and then processing the received data (e.g., second rotation angle information). According to an embodiment, there is a possibility that a delay may occur depending on the actual system implementation, from the point in time when the electronic device  300  receives the second rotation angle information by using the short-range communication module  310  to the time when the second rotation angle information reaches a functional element (e.g., an application  860  of  FIG. 8 ) configured to correct the received second rotation angle information. Alternatively, a delay may occur from the point in time when the second rotation angle information is received to the point in time when the processor  340  corrects the received second rotation angle information. In this case, latency check data may be used to identify the delay time that has occurred. According to an embodiment, the latency check data may be information for identifying a time delay taken for data transmission between two devices (e.g., the electronic device  300  and the wearable device  220 ). According to an embodiment, the latency check data may be information required to calculate a delay time taken for data from each functional element (e.g., a BT  850  in  FIG. 8 ) of the electronic device  300  to reach another functional element (e.g., an application  860  in  FIG. 8 ) thereof. For example, the latency check data may be unique information associated with specific data transmitted at a specific time point in the plurality of second rotation angle information transmitted in real time. The latency check data may be, for example, unique data relating to one data transmission unit (e.g., a packet) transmitted by the wearable device  220 . According to an embodiment, the latency check data may be check data uniquely assigned to the second rotation angle information. According to an embodiment, the processor  340  may receive check data (e.g., latency check data) uniquely assigned to the second rotation angle information. When two predetermined packets include the identical latency check data, the processor  340  may recognize that the two packets include the same data. The information related to the posture of the wearable device  220  may be, for example, second rotation angle information, and the second rotation angle information may include information regarding the rotation angle (e.g., yaw-pitch-roll (YPR) information) with reference to the three-dimensional coordinates of the wearable device  220 . The latency check data may be, for example, information (e.g., sequence information) regarding the sequence of signals and/or information transmitted by the wearable device  220  to the electronic device  300 . According to an embodiment, the processor  340  may receive, from the wearable device  220 , a signal (e.g., an SPP message) for controlling a wireless connection with the wearable device  220 , a time stamp related to transmission, reception, or processing times of the SPP message, and YPR data (e.g., rotation angle information) and/or latency check data of the wearable device  220 . The above data may be included in the same transmission unit (packet). 
     According to an embodiment, the processor  340  may configure a first time stamp and a second time stamp. The time stamp may be information of a recorded system time, such as when a wireless connection control signal (e.g., an SPP message) received from the wearable device  220  is transmitted to the electronic device  300 , is transmitted to a functional element (e.g., an application  860  of  FIG. 8 ) of the electronic device  300 , or is processed in the functional element. The processor  340  may configure, change, or update the time stamp with respect to the same SPP message. The processor  340  may continuously receive the SPP message from the wearable device  220 , and may configure a first time stamp in response to the time point at which the received SPP message is received by the short-range communication module  310 . The processor  340  may temporarily or permanently store the configured first time stamp in the memory  330 . According to an embodiment, the processor  340  may configure the first time stamp in response to the time of receiving the SPP message and the latency check data. The processor  340  may receive the SPP message when it is included in the same transmission unit as the rotation angle information (e.g., second rotation angle information) and latency check data of the wearable device  220 , and may configure, at the time of receiving the SPP message or the time of receiving the second rotation angle information, the first time stamp in response to the corresponding message or latency check data included in the same packet as the corresponding second rotation angle information. According to an embodiment, the processor  340  may configure a second time stamp. The second time stamp may be, for example, a time stamp configured in response to latency check data and the time point for correction of the second rotation angle information. According to an embodiment, the processor  340  may correct the second rotation angle information received from the wearable device  220 , and the correction of the second rotation angle may be performed after time period equal to a predetermined period of time (e.g., delay time) from the time of receiving the second rotation angle information. The delay time may differ depending on, for example, data processing speed of the processor  340 , the configuration environment of the processor  340 , the type of an application being executed by the processor  340 , or the data processing mode of the processor  340 . The processor  340  may configure the second time stamp at substantially the same time as the time of correcting the second rotation angle information, for example, immediately before the second rotation angle information is corrected. 
     According to an embodiment, the processor  340  may calculate the delay time. According to an embodiment, the first time stamp and the second time stamp configured by the processor  340  may be at different time points. For example, the first and second time stamps may be the reception time point and the correction time point, respectively, in response to receiving the second rotation angle information having latency check data. The processor  340  may calculate the delay time by using different first and second time stamps that correspond to the same latency check data. According to an embodiment, the processor  340  may calculate the delay time by using the difference between the second time stamp and the first time stamp. According to an embodiment, the delay time may refer to the difference from the time point at which the same second rotation angle information is received by the electronic device  300  to the time point at which the second rotation angle information is corrected. 
     According to an embodiment, the processor  340  may correct the second rotation angle information. According to an embodiment, the second rotation angle information may be information indicating rotation information of the wearable device  220 . The rotation angle of the wearable device  220  may be in a state of being changed when the processor  340  receives and processes the second rotation angle information. The processor  340  may correct the second rotation angle information based on the calculated delay time. According to an embodiment, the processor  340  may continuously generate information regarding a variance in the previously received second rotation angle information (e.g., rotation angle variance information) when correcting the second rotation angle information. According to an embodiment, the processor  340  may calculate a correction value for the second rotation angle information based on the rotation angle variation information and the delay time, and may apply the calculated correction value to the received second rotation angle information to correct the second rotation angle information. According to an embodiment, the processor  340  may calculate a rotation direction of the wearable device  220  based on the second rotation angle information received from the wearable device  220 . According to an embodiment, the processor  340  may calculate the rotation direction of the wearable device  220  and identify rotation-enabling range information, which is pre-stored in the memory  330 , based on the rotation direction. The rotation-enabling range information may be, for example, a range of maximum rotatable angle corresponding to the rotation direction. Rotation of the wearable device  220  may be made by the movement of a body part (e.g., the head) of the user wearing the wearable device  220 , and the movement of the user&#39;s body part (e.g., the head) exhibits different tendencies depending on the rotation direction. For example, with reference to the head of the user wearing the wearable device  220 , the rotation-enabling range in the up and down directions may have a relatively small value compared to the rotation-enabling range in the left and right directions. According to an embodiment, the processor  340  may correct the second rotation angle information based on the identified rotation-enabling range information. According to an embodiment, the processor  340  may receive multiple short-range wireless signals (e.g., ultra-wide band (UWB) signals) output from multiple components (e.g., the first wearable device  221  and the second wearable device  222 ) of the wearable device  220 , and may control the sensor  320  to measure distances from each component from which each of multiple short-range wireless signals are output. These distances may be, for example, the distances between each component from which the wearable device  220  outputs short-range wireless signals, to the electronic device  300 . According to an embodiment, the processor  340  may measure the movement of the user&#39;s body part (e.g., the head) by using each measured distance values obtained by using short-range wireless signals, and may correct the second rotation angle information by using the difference between the movement measurement value of the user&#39;s body part (e.g., the head) and the second rotation angle information. According to an embodiment, the processor  340  may correct the second rotation angle information by using each measured distance. 
     According to an embodiment, the processor  340  may generate posture information. According to an embodiment, the posture information may be information related to a relative posture formed by the wearable device  220  with reference to the position and posture of the electronic device  300 . The posture information may include, for example, the position and rotation angle information of the wearable device  220  with reference to the electronic device  300 . According to an embodiment, the processor  340  may generate posture information based on the rotation angle information (e.g., first rotation angle information) of the electronic device  300  and rotation angle information (e.g., second rotation angle information) of the wearable device  220 . According to an embodiment, the processor  340  may calculate a relative rotation angle of the wearable device  220  with respect to the electronic device  300  by using the first rotation angle information and the second rotation angle information, and may generate the calculated relative rotation angle as the posture information. 
     According to an embodiment, the processor  340  may render audio information based on the posture information and transmit the rendered audio information to an external electronic device (e.g., the wearable device  220  of  FIG. 2 ). According to an embodiment, the processor  340  may render audio information based on the generated posture information. Rendering may refer to, for example, changing audio information based on the posture information generated by the processor  340 . According to an embodiment, the three-dimensional sound service may refer to forming a virtual sound source, that is, a sound image that allows the listener to feel as if the sound source exists at a designated location when audio information is output by the wearable device  220 . According to an embodiment, the processor  340  may render audio information together with information for adjusting the sound output based on the posture information, and may give the listener the effect that the sound source is located in a particular virtual location. According to an embodiment, the processor  340  may render audio information in order to give the listener, who receives the three-dimensional sound service through the wearable device  220 , the effect that a sound image is to be formed at the electronic device  300  or at a designated location with respect to the electronic device  300 . According to an embodiment, the processor  340  may transmit the rendered audio information to the wearable device  220 . 
     According to an embodiment, the processor  340  may learn a pattern regarding the rotation direction of the wearable device  220 . The pattern regarding the rotation direction may refer to, for example, the rotation direction of the wearable device  220 , calculated in response to rotation angle information (e.g., second rotation angle information). According to an embodiment, the processor  340  may collect learning data, that is, information regarding a rotation state. According to an embodiment, the information regarding the rotation state may include a stationary state, a rotation state, a left/right rotation state, an up/down rotation state, or a combination thereof. The learning data may be, for example, information regarding various states of the user&#39;s head as a result of the rotation. According to an embodiment, the learning data may be information regarding rotation states pre-stored in the memory  330  or information calculated using rotation angle information (e.g., first rotation angle information or second rotation angle information). According to an embodiment, the processor  340  may store the collected learning data in at least a partial area of the memory  330 . 
     According to an embodiment, the processor  340  may determine basic data. According to an embodiment, the processor  340  may determine basic data that serves as a basis for learning the rotation direction pattern. The basic data may be, for example, a sensor value of the wearable device  220 , received from the wearable device  220 . According to an embodiment, the processor  340  may receive an acceleration value generated by an acceleration sensor (e.g., the acceleration sensor  421  of  FIG. 4 ) and an angular velocity value generated by a gyro sensor (e.g., the gyro sensor  422  of  FIG. 4 ) of the wearable device  220  and store the same. The basic data determined by the processor  340  may include the acceleration value and angular velocity value of the wearable device  220 . According to an embodiment, the basic data may include a pre-stored rotation-enabling range, a system environment of the electronic device  300 , an operation mode of the processor  340 , or a type of an application being executed by the processor  340 . 
     According to an embodiment, the processor  340  may extract a feature value. According to an embodiment, the processor  340  may extract a vector direction, which serves as the feature value of a rotation direction pattern and rotation angle information (e.g., a second rotation angle information) of the wearable device  220 , based on the acceleration value and the angular velocity value determined as basic data. According to an embodiment, the processor  340  may receive the second rotation angle information from the wearable device  220 , and may store the received second rotation angle information as a feature value. 
     According to an embodiment, the processor  340  may learn the rotation direction based on the feature value. According to an embodiment, the processor  340  may learn the rotation direction based on the feature value extracted using an algorithm pre-stored in the memory  330  and the collected and stored learning data. 
     According to an embodiment, the processor  340  may classify the learning data, and may store, in the memory  330 , information regarding the rotation direction based on the classified learning data. According to an embodiment, the processor  340  may correct the second rotation angle information based on the learned rotation direction data. 
     According to an embodiment, the processor  340  may use posture information in order to provide the three-dimensional sound service. According to an embodiment, when rendering the audio information, the processor  340  may render audio information based on the generated posture information, or may render the audio information based on a default value (stationary state) without using the posture information. According to an embodiment, the processor  340  may determine whether to provide the three-dimensional sound service or whether the three-dimensional sound service is required, by using the posture information. 
     According to an embodiment, the processor  340  may sense whether an external electronic device (e.g., the wearable device  400  of  FIG. 4 ) is rotated. According to an embodiment, the posture information may be generated based on rotation angle information (e.g., first rotation angle information) of the electronic device  300  and rotation angle information (e.g., second rotation angle information) of the wearable device  400 . According to an embodiment, when rotation of the wearable device  400  is sensed, the processor  340  may determine that the user&#39;s movement has occurred, and may determine that it is necessary to provide the three-dimensional sound service. According to an embodiment, when rotation of the wearable device  400  is sensed, the processor  340  may render audio information based on the posture information. 
     According to an embodiment, the processor  340  may sense whether the electronic device  300  is rotated. According to an embodiment, when the rotation of the electronic device  300  is sensed substantially simultaneously with the rotation of the wearable device  400 , the processor  340  may determine that there is no need to provide the three-dimensional sound service. According to an embodiment, when the electronic device  300  rotates substantially simultaneously with the wearable device  400 , the electronic device  300  may move together with the user and the wearable device  400 . In this case, it may not be necessary to provide the three-dimensional sound service. Alternatively, when the rotation of the electronic device  300  occurs substantially simultaneously with the rotation of the wearable device  400 , there is a risk that the three-dimensional sound service may cause confusion to the listener and thus, the processor  340  may not provide the three-dimensional sound service. 
     According to an embodiment, the processor  340  may render audio information based on the posture information. According to an embodiment, when the rotation of the wearable device  400  is sensed and when the rotation of the electronic device  300  is not sensed, the processor  340  may render audio information using the generated posture information. 
     According to an embodiment, the processor  340  may render audio information using a default value. According to an embodiment, when it is determined that the three-dimensional sound service is unnecessary, that is, when the rotation of the wearable device  400  is not sensed or when the rotation of the electronic device  300  occurs substantially simultaneously with the rotation of the wearable device  400 , the processor  340  may render the audio information using the preset default value, and therefore not render the audio information based on the posture information. 
       FIG. 4  is a block diagram of a wearable device according to an embodiment. 
     According to an embodiment, a wearable device  400  may include a short-range communication module  410 , a sensor  420 , a speaker  430 , and a processor  440 . The wearable device  400  may include at least part of the configuration and/or functions included in the electronic device  102  of  FIG. 1  and the wearable device  220  of  FIG. 2 . 
     According to an embodiment, the short-range communication module  410  may include a software and/or a hardware module (e.g., a communication processor (CP)) for wirelessly communicating with a network (e.g., the wireless communication network  230  of  FIG. 2 ) or an external electronic device (e.g., the electronic device  210  of  FIG. 2 ). The communication module may be communicatively connected with an electronic device (e.g., the electronic device  210  of  FIG. 2  or the electronic device  300  of  FIG. 3 ) through a short-range wireless communication network (e.g., the first network  198  of  FIG. 1 ). According to an embodiment, the short-range communication module  410  may transmit data provided from another element (e.g., the processor  440 ) of the wearable device  400  to an external electronic device (e.g., the electronic device  300  of  FIG. 3 ), or may receive data from the external electronic device and provide the received data to other element of the wearable device  400 . 
     According to an embodiment, the sensor  420  may sense the movement of the wearable device  400 . According to an embodiment, the sensor  420  may sense a physical quantity, which is related to the movement of the wearable device  400  and includes information related to the posture of the wearable device  400 , for example, the speed, acceleration, angular velocity, angular acceleration, and/or geographic location of the wearable device  400 . According to an embodiment, the sensor  420  may at least include an acceleration sensor  421  and a gyro sensor  422 . According to an embodiment, the sensor  420  may generate acceleration information of the wearable device  400  via the acceleration sensor  421 . According to an embodiment, the sensor  420  may generate angular velocity information of the wearable device  400  via the gyro sensor  422 . According to an embodiment, the sensor  420  may generate rotation angle information (e.g., second rotation angle information) of the wearable device  400  by using the acceleration information and the angular velocity information. 
     According to an embodiment, the speaker  430  may output audio information of the wearable device  400 . The speaker  430  may convert the audio information from digital to analog and output the analog signal. According to an embodiment, the speaker  430  may output audio information received from the electronic device  300  under the control of the processor  440 . 
     According to an embodiment, the processor  440  may process data within the wearable device  400 , may control at least one other element related to a function of the wearable device  400 , and may perform data processing and computation required to perform various functions. The processor  440  may be electrically and/or functionally connected to elements of the wearable device  400 , such as the short-range communication module  410 , the sensor  420 , or the speaker  430 . According to an embodiment, the processor  440  may not be limited to the computation and data processing functions that can be implemented in the wearable device  400 . However, as disclosed herein, the function of generating and transmitting rotation angle information in order to provide the three-dimensional sound service and outputting audio information received from the electronic device  300  will be primarily described. 
     According to an embodiment, the processor  440  may generate second rotation angle information. The second rotation angle information may be, for example, information regarding the rotation angle of the wearable device  400  indicating the degree of rotation of the wearable device  400 . According to an embodiment, the processor  440  may control the sensor  420  to generate angular velocity information, acceleration information, and/or position information of the wearable device  400 , and may combine and/or compute the generated angular velocity information, acceleration information, and/or position information to generate rotation angle information (e.g., second rotation angle information) of the wearable device  400 . The rotation angle information may be information indicating the degree at which the wearable device  400  rotates with reference to virtual three-dimensional coordinates. The rotation angle information may be expressed as an angle, and the virtual three-dimensional coordinates may be formed with reference to at least a partial area of the wearable device  400 . The rotation angle information may include at least three types of rotation angles (e.g., R value, P value, and Y value) used to specify three dimensions. According to an embodiment, the rotation angle information may include an X-axis rotation angle (roll, R value) with reference to the X-axis, a Y-axis rotation angle (pitch, P value) with reference to the Y-axis, and a Z-axis rotation angle (yaw, Y value) with reference to the Z-axis, and three pieces of rotation angle information may be collected as one piece of rotation angle information (e.g., yaw-pitch-roll (YPR) information). According to an embodiment, the processor  440  may continuously and/or periodically generate the second rotation angle information. 
     According to an embodiment, the processor  440  may be connected to an external electronic device (e.g., the electronic device  300  of  FIG. 3 ). The processor  440  may control the short-range communication module  410  to establish a wireless connection with the electronic device  300 . The processor  440  may transmit a signal for controlling to establish and maintain the wireless connection with the electronic device  300  using the short-range communication module  410 , and may continuously and/or periodically transmit or receive a signal related to wireless connection control (e.g., a serial port profile (SPP) message) during wireless connection establishment and wireless connection performance. 
     According to an embodiment, the processor  440  may generate second rotation angle information and latency check data of the second rotation angle information, and transmit the same to the electronic device  300 . According to an embodiment, the processor  440  may transmit information related to the posture of the wearable device  400 , for example, second rotation angle information, to the electronic device  300  by using the short-range communication module  410 . The processor  440  may continuously and/or periodically transmit the posture-related information of the wearable device  400 , and may generate latency check data related to the sequence of the posture-related information substantially simultaneously or sequentially with the posture-related information and transmit the same to the electronic device  300 . According to an embodiment, the latency check data may be information used for identifying a delay time between the receiving of data (e.g., second rotation angle information) and the processing of the received data (e.g., second rotation angle information). According to an embodiment, there is a possibility that a delay may occur depending on the actual system implementation, from the point in time when the electronic device  300  receives the second rotation angle information by using the short-range communication module  310  to the point in time when the second rotation angle information reaches a functional element (e.g., an application  860  of  FIG. 8 ) configured to correct the received second rotation angle information. Alternatively, a delay time may occur from the point in time when the second rotation angle information is received to the point in time when the processor  340  of the electronic device  300  corrects the received second rotation angle information. In this case, latency check data may be used to identify the delay time that has occurred. According to an embodiment, the latency check data may be information for identifying a time delay consumed for data transmission between two devices (e.g., the electronic device  300  and the wearable device  400 ). According to an embodiment, the latency check data may be information required to calculate a delay time taken for data from each functional element (e.g., a BT  850  in  FIG. 8 ) of the electronic device  300  to reach another functional element (e.g., an application  860  in  FIG. 8 ) thereof. For example, the latency check data may be unique information associated with specific data transmitted at a specific time point in the plurality of second rotation angle information transmitted in real time. The latency check data may be, for example, unique data relating to one data transmission unit (e.g., a packet) transmitted by the wearable device  400 . According to an embodiment, the latency check data may be check data uniquely assigned to the second rotation angle information. According to an embodiment, the processor  340  may receive check data (e.g., latency check data) uniquely assigned to the second rotation angle information. With regard to a predetermined packet, unique latency check data may be included therein. The information related to the posture of the wearable device  400  may be, for example, second rotation angle information, and the second rotation angle information may include information regarding the rotation angle (e.g., yaw-pitch-roll (YPR) information) with reference to the three-dimensional coordinates of the wearable device  400 . The latency check data may be, for example, information (e.g., sequence information) regarding the sequence of information and/or signal transmitted by the processor  440  to the electronic device  300 . According to an embodiment, the processor  440  may transmit, to the electronic device, a signal (e.g., an SPP message) for controlling a wireless connection with the electronic device  300 , a time stamp related to transmission, reception, or processing times of the SPP message, and YPR data (e.g., rotation angle information) and/or latency check data of the wearable device  400 . The above data may be included in the same transmission unit (packet). 
       FIGS. 5A and 5B  illustrate a three-dimensional sound service according to an embodiment. 
       FIG. 6  illustrates a user interface according to an embodiment. 
     Referring to [a] of  FIG. 5A , information related to the posture of the user  500  may be expressed as rotation angle information (e.g., second rotation angle information) of the wearable device  400 . According to an embodiment, the electronic device  300  may use information related to the posture of the user  500  in order to provide the three-dimensional sound service. The information related to the posture of the user  500  may require only information regarding the movement of the user&#39;s head  510 , and the wearable device  400  may sense a physical quantity (e.g., acceleration and angular velocity) generated or changed according to the movement of the user&#39;s head  510 . The movement of the user&#39;s head  510  may be expressed as a rotation angle using three-dimensional coordinates. According to an embodiment, the wearable device  400  may generate second rotation angle information. The second rotation angle information may be, for example, information regarding the rotation angle of the wearable device  400  indicating the degree of rotation of the wearable device  400 . The rotation angle information may be information indicating the degree at which the wearable device  400  or the user&#39;s head  510  rotates with reference to virtual three-dimensional coordinates. The rotation angle information may be expressed as an angle, and the virtual three-dimensional coordinates may be formed with reference to at least a partial area of the wearable device  400  or at least a partial area of the user&#39;s head  510  wearing the wearable device  400 . The rotation angle information may include at least three types of rotation angles (e.g., R value, P value, and Y value) configuring three dimensions. According to an embodiment, the rotation angle information may include an X-axis rotation angle (roll, R value) with reference to the X-axis, a Y-axis rotation angle (pitch, P value) with reference to the Y-axis, and a Z-axis rotation angle (yaw, Y value) with reference to the Z-axis, and three pieces of rotation angle information may be expressed together as one piece of rotation angle information (e.g., yaw-pitch-roll (YPR) information). 
     Referring to [b] of  FIG. 5A , the electronic device  300  may provide a three-dimensional sound service to the user  500 . The three-dimensional sound service may refer to the function of outputting sound based on the posture information of the user  500 . According to an embodiment, the posture information may be generated based on the posture of the user  500  and the posture of the electronic device  300 . The posture of the user  500  may include, for example, information regarding the rotation angle of the user&#39;s head  510 . According to an embodiment, the posture information may be information regarding a posture formed by the user&#39;s head  510  with reference to the position of the electronic device  300  and/or the rotation angle of the electronic device  300 . According to an embodiment, the three-dimensional sound service may refer to forming a virtual sound source, that is, a sound image that allows the listener (i.e. the user  500 ) to feel as if a sound source exists at a designated location when audio information is output by the wearable device  400 . According to an embodiment, the electronic device  300  may render audio information together with information for adjusting the sound output based on the posture information, and may give the listener the effect that the virtual sound sources  520  are located in a designated virtual location. According to an embodiment, multiple virtual sound sources  520  may exist, and the electronic device  300  may control the wearable device  400  to render audio information based on information (e.g., posture information) related to the movement of the user&#39;s head  510  so that the virtual sound sources  520  are felt as if they exist at predetermined locations. 
     Referring to  FIG. 5B , the three-dimensional sound service may be described based on the location of the virtual sound sources  520  and the corresponding sound image. Referring to [a] of  FIG. 5B , a conventional example in which the three-dimensional sound service is not provided is described. For example, the case [a] of  FIG. 5B  may describe a conventional sound service. When the three-dimensional sound service is not provided, that is, when rendering of audio information using posture information is not performed and the user&#39;s head  510  is rotated from a first posture  511  to a second posture  512 , the sound image can be rotated from the first sound image  521  to the second sound image  522 . 
     Referring to [b] of  FIG. 5B , the effect of the electronic device  300  providing a three-dimensional sound service may be described. According to an embodiment, when the user&#39;s head  510  is rotated from a third posture  513  to a fourth posture  514 , a change may occur in the posture information. Even in the case in which the posture information is changed during formation of a third sound image  523 , the electronic device  300  may form a fourth sound image  524  at the same position with respect to the electronic device  300 . In this case, it is possible to generate the effect in which the position of the sound image is relatively changed with respect to the user. 
     Referring to  FIG. 6 ,  FIG. 6  may illustrate a user interface (UI) for execution of a three-dimensional sound service. According to an embodiment, the electronic device (e.g., the electronic device  101  of  FIG. 1 , the electronic device  210  of  FIG. 2 , and/or the electronic device  300  of  FIG. 3 ) may provide a three-dimensional sound service function using an application stored in a memory (e.g., the memory  330 ). The application providing the three-dimensional sound service may include, for example, instructions causing the processor (e.g., the processor  340  of  FIG. 3 ) to provide the three-dimensional sound service, and may include a user interface  610  for execution of a three-dimensional sound service function. For example, the user interface  610  may include a function menu (e.g., a “useful function” menu button  611 ) for execution of the three-dimensional sound service function. According to an embodiment, the application providing the three-dimensional sound service may include a user interface  620  for activating the function for the three-dimensional sound service, and a visual object (e.g., a button)  622  for activating the three-dimensional sound service function. According to an embodiment, when the three-dimensional sound service function is activated, the electronic device (e.g., the electronic device  300  of  FIG. 3 ) may provide three-dimensional sound while performing various functions (e.g., video playback  630 ) supporting the sound service. 
       FIG. 7  is a flowchart illustrating an operation of an electronic device for generating posture information according to an embodiment. 
     The operation of generating posture information by an electronic device (e.g., the electronic device  300  of  FIG. 3 ) may be described as an operation of a processor (e.g., the processor  340  of  FIG. 3 ) included in the electronic device  300 . 
     Referring to operation  710 , the processor  340  may generate first rotation angle information. The first rotation angle information may be, for example, information regarding the rotation angle of the electronic device  300 , indicating the degree of rotation of the electronic device  300 . According to an embodiment, the processor  340  may generate angular velocity information, acceleration information, and/or position information of the electronic device  300  by controlling the sensor (e.g., the sensor  320  of  FIG. 3 ), and may combine and/or compute the generated angular velocity information, acceleration information, and/or position information to generate rotation angle information (e.g., first rotation angle information) of the electronic device  300 . The rotation angle information may be information indicating the degree at which the electronic device  300  rotates with reference to virtual three-dimensional coordinates. The rotation angle information may be expressed as an angle, and the virtual three-dimensional coordinates may be formed with reference to at least a partial area of the electronic device  300 . The rotation angle information may include at least three types of rotation angles (e.g., R value, P value, and Y value) configuring three dimensions. According to an embodiment, the rotation angle information may include an X-axis rotation angle (roll, R value) with reference to the X-axis, a Y-axis rotation angle (pitch, P value) with reference to the Y-axis, and a Z-axis rotation angle (yaw, Y value) with reference to the Z-axis, and three pieces of rotation angle information may be expressed as one piece of rotation angle information (e.g., yaw-pitch-roll (YPR) information). According to an embodiment, the processor  340  may continuously and/or periodically generate the first rotation angle information. 
     Referring to operation  720 , the processor  340  may be connected to an external electronic device (e.g., the wearable device  220  of  FIG. 2  and/or the wearable device  400  of  FIG. 4 ). The processor  340  may control a short-range communication module (e.g., the short-range communication module  310 ) to establish a wireless connection with the wearable device  400 . The processor  340  may transmit a signal for controlling to establish and maintain the wireless connection with the wearable device  400  using the short-range communication module  310 , and may continuously and/or periodically transmit or receive a signal related to wireless connection control (e.g., a serial port profile (SPP) message) during wireless connection establishment and wireless connection performance. 
     Referring to operation  730 , the processor  340  may receive second rotation angle information and latency check data of the second rotation angle information. According to an embodiment, the processor  340  may receive, from the wearable device  400 , information related to the posture of the wearable device  400 , for example, second rotation angle information via the short-range communication module  310 . The processor  340  may continuously and/or periodically receive information related to the posture of the wearable device  400 , and may receive latency check data related to the sequence of the posture-related information substantially simultaneously or sequentially with the posture-related information periodically transmitted from the wearable device  400 . According to an embodiment, the latency check data is information for identifying a delay time between receiving data (e.g., second rotation angle information) and then processing the received data (e.g., second rotation angle information). According to an embodiment, there is a possibility that a delay may occur depending on the actual system implementation, from the point in time when the electronic device  300  receives the second rotation angle information by using the short-range communication module  310  to the time when the second rotation angle information reaches a functional element (e.g., an application  860  of  FIG. 8 ) configured to correct the received second rotation angle information. Alternatively, a delay time may occur from the point in time when the second rotation angle information is received to the point in time when the processor  340  corrects the received second rotation angle information. In this case, latency check data may be used to identify the delay time that has occurred. According to an embodiment, the latency check data may be information for identifying a time delay taken for data transmission between two devices (e.g., the electronic device  300  and the wearable device  400 ). According to an embodiment, the latency check data may be information required to calculate a delay time taken for data from each functional element (e.g., a BT  850  in  FIG. 8 ) of the electronic device  300  to reach another functional element (e.g., an application  860  in  FIG. 8 ) thereof. For example, the latency check data may be unique information associated with specific data transmitted at a specific time point in the plurality of the second rotation angle information transmitted in real time. The latency check data may be, for example, unique data relating to one data transmission unit (e.g., a packet) transmitted by the wearable device  400 . According to an embodiment, the latency check data may be check data uniquely assigned to the second rotation angle information. According to an embodiment, the processor  340  may receive check data (e.g., latency check data) uniquely assigned to the second rotation angle information. When two predetermined packets include the identical latency check data, the processor  340  may recognize that the two packets include the same data. The information related to the posture of the wearable device  400  may be, for example, second rotation angle information, and the second rotation angle information may include information regarding the rotation angle with reference to the three-dimensional coordinates of the wearable device  400  (e.g., yaw-pitch-roll (YPR) information). The latency check data may be, for example, information (e.g., sequence information) regarding the sequence of signals and/or information transmitted by the wearable device  400  to the electronic device  300 . According to an embodiment, the processor  340  may receive, from the wearable device  400 , a signal (e.g., an SPP message) for controlling a wireless connection with the wearable device  400 , a time stamp related to transmission, reception, or processing times of the SPP message, and YPR data (e.g., rotation angle information) and/or latency check data of the wearable device  400 . The above data may be included in the same transmission unit (packet). 
     Referring to operation  740 , the processor  340  may configure a first time stamp and a second time stamp. The time stamp may be information of a recorded system time of, for example, when a wireless connection control signal (e.g., an SPP message) received from the wearable device  400  is transmitted to the electronic device  300 , is transmitted to a functional element (e.g., an APP  860  of  FIG. 8 ) of the electronic device  300 , or is processed in the functional element. The processor  340  may configure, change, or update a time stamp with respect to the same SPP message. The processor  340  may continuously receive the SPP message from the wearable device  400 , and may configure the first time stamp in response to the time point at which the received SPP message is received by the short-range communication module  310 . The processor  340  may temporarily or permanently store the configured first time stamp in the memory (e.g., the memory  330  of  FIG. 3 ). According to an embodiment, the processor  340  may configure the first time stamp based on the time of receiving the SPP message and the latency check data. The processor  340  may receive the SPP message when it is included in the same transmission unit as the rotation angle information (e.g., second rotation angle information) and latency check data of the wearable device  400 , and may configure, at the time of receiving the SPP message or the time of receiving the second rotation angle information, the first time stamp in response to the latency check data being included in the same packet as the corresponding message or the corresponding second rotation angle information. According to an embodiment, the processor  340  may configure a second time stamp. The second time stamp may be, for example, a time stamp configured based on the latency check data and the time point for correction of the second rotation angle information. According to an embodiment, the processor  340  may correct the second rotation angle information received from the wearable device  400 , and the correction of the second rotation angle may be performed when a predetermined period of time (e.g., a delay time) from the time of receiving the second rotation angle information has elapsed. The delay time may differ depending on, for example, the data processing speed of the processor  340 , the configuration environment of the processor  340 , the type of an application being executed by the processor  340 , or the data processing mode of the processor  340 . The processor  340  may configure the second time stamp at substantially the same time as the time of correcting the second rotation angle information, for example, immediately before the second rotation angle information is corrected. 
     Referring to operation  750 , the processor  340  may calculate the delay time. According to an embodiment, the first time stamp and the second time stamp configured by the processor  340  may be at different time points. For example, the first and second time stamps may be the reception time and the correction time, respectively, in response to receiving the second rotation angle information having latency check data. The processor  340  may calculate the delay time by using different first and second time stamps that correspond to the same latency check data. According to an embodiment, the processor  340  may calculate the delay time by using the difference between the second time stamp and the first time stamp. According to an embodiment, the delay time may refer to the difference from the time point at which the same second rotation angle information is received by the electronic device  300  to the time point at which the second rotation angle information is corrected. 
     Referring to operation  760 , the processor  340  may correct the second rotation angle information. According to an embodiment, the second rotation angle information may be information indicating rotation information of the wearable device  400 . The rotation angle of the wearable device  400  may be changed at the time point at which the processor  340  receives and processes the second rotation angle information. The processor  340  may correct the second rotation angle information based on the calculated delay time. According to an embodiment, the processor  340  may continuously generate information regarding a variance in the previously received second rotation angle information (e.g., rotation angle variance information) at the time of correcting the second rotation angle information. According to an embodiment, the processor  340  may calculate a correction value for the second rotation angle information based on the rotation angle variation information and the delay time, and may apply the calculated correction value to the received second rotation angle information to correct the second rotation angle information. According to an embodiment, the processor  340  may correct the second rotation angle information using Equations 1 and 2. Referring to Equations 1 and 2, Ψ k  may represent corrected second rotation angle information, and Ψ k-1  may represent previously corrected second rotation angle information. For example, Ψ k  may be k-th corrected second rotation angle information, Ψ k-1  may be (k−1)th corrected second rotation angle information, and Ψ 0  may be second rotation angle information before correction. In addition, Δ  may represent the rotation angle variance information, and delay latency  may represent the delay time. Referring to Equations 1 and 2, the final correction value of the second rotation angle information may be calculated based on the previous correction value and the current delay time. 
     
       
         
           
             
               
                 
                   
                       
                   
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     Referring to Equation 1, when the variance value in the rotation angle is not 0, for example, when the rotation angle changes, the second rotation angle information may be corrected by adding the variance in the rotation angle corresponding to the delay time to the second rotation angle information. 
     Referring to Equation 2, when the rotation angle is no longer changed, such as in the case when correction has already been made by further adding the rotation angle corresponding to the delay time. In this case, the second rotation angle information may be corrected by subtracting the variance in the rotation angle corresponding to the delay time from the second rotation angle information. 
     According to an embodiment, the processor  340  may calculate the rotation direction of the wearable device  400  based on the second rotation angle information received from the wearable device  400 . According to an embodiment, the processor  340  may calculate a rotation direction of the wearable device  400  and identify rotation-enabling range information, which is pre-stored in the memory  330 , based on the rotation direction. The rotation-enabling range information may be, for example, a range of a maximum rotatable angle corresponding to the rotation direction. Rotation of the wearable device  400  may be made by the movement of the head of the user wearing the wearable device  400 , and the movement of the user&#39;s head exhibits different tendencies depending on the rotation direction. For example, with reference to the head of the user wearing the wearable device  400 , the rotation-enabling range in the up and down directions may have a relatively small value compared to the rotation-enabling range in the left and right directions. According to an embodiment, the processor  340  may correct the second rotation angle information based on the identified rotation-enabling range information. According to an embodiment, the processor  340  may receive multiple short-range wireless signals (e.g., ultra-wide band (UWB) signals) output from various components (e.g., the first wearable device  221  and the second wearable device  222 ) of the wearable device  400 , and may control the sensor  320  to measure distances from each component from which each of multiple short-range wireless signals are output. These distances may refer to, for example, the distances between each component from which the wearable device  220  outputs short-range wireless signals, to the electronic device  300 . According to an embodiment, the processor  340  may measure the movement of the user&#39;s body part (e.g., the head) by using each measured distance values using short-range wireless signals, and may correct the second rotation angle information by using the difference between the movement measurement value of the user&#39;s body part (e.g., the head) and the second rotation angle information. According to an embodiment, the processor  340  may correct the second rotation angle information by using each measured distance. 
     Referring to operation  770 , the processor  340  may generate posture information. According to an embodiment, the posture information may be information related to a relative posture formed by the wearable device  400  with reference to the position and posture of the electronic device  300 . The posture information may include, for example, the position and rotation angle information of the wearable device  400  with reference to the electronic device  300 . According to an embodiment, the processor  340  may generate posture information based on the rotation angle information (e.g., first rotation angle information) of the electronic device  300  and rotation angle information (e.g., second rotation angle information) of the wearable device  400 . According to an embodiment, the processor  340  may calculate a relative rotation angle of the wearable device  400  with respect to the electronic device  300  by using the first rotation angle information and the second rotation angle information, and may generate the calculated relative rotation angle as the posture information. 
     Referring to operation  780 , the processor  340  may render audio information based on the posture information and transmit the rendered audio information to an external electronic device (e.g., the wearable device  400  of  FIG. 4 ). According to various embodiments, the processor  340  may render audio information based on the generated posture information. Rendering may refer to, for example, changing audio information based on the posture information generated by the processor  340 . According to an embodiment, the three-dimensional sound service may refer to forming a virtual sound source, that is, a sound image that allows the listener to feel as if the sound source exists at a designated location when audio information is output by the wearable device  400 . According to an embodiment, the processor  340  may render audio information together with information for adjusting the sound output based on the posture information, and may give the listener the effect that the sound source is located in a particular virtual location. According to an embodiment, the processor  340  may render audio information in order to give the listener, who receives the three-dimensional sound service through the wearable device  400 , the effect that a sound image is to be formed at the electronic device  300  or at a designated location with respect to the electronic device  300 . According to an embodiment, the processor  340  may transmit the rendered audio information to the wearable device  400 . 
       FIG. 8  illustrates functional elements and information flow of an electronic device for measuring a user&#39;s posture according to an embodiment. 
     Referring to  FIG. 8 , the electronic device  300  may receive rotation angle information (e.g., second rotation angle information  810 ) of the wearable device  400  from the wearable device by using a Bluetooth communication module  850  (e.g., the short-range communication module  310  of  FIG. 3 ). According to an embodiment, the received second rotation angle information may be transmitted to an application  860  via a service module  865 . According to an embodiment, a sensor module  870  may generate rotation angle information (e.g., first rotation angle information  830 ) of the electronic device  300 , and the first rotation information  830  generated by the sensor module  870  may be transmitted to the application  860  through the service module  865 . The application  860  may be, for example, an application for providing the three-dimensional sound service. According to an embodiment, the application  860  may generate a control signal  820  for the sensor module  870  and transmit the control signal to the service module  865 . The service module  865  may control the sensor module  870  based on the control signal  820  received from the application  860 . According to an embodiment, the application  860  may generate posture information  840  based on the received first rotation angle information  830  and second rotation angle information  810 . According to an embodiment, the application  860  may correct the second rotation angle information  810  and generate the posture information  840  based on the corrected second rotation angle information  810 . According to an embodiment, the application  860  may transmit the generated posture information  840  to a three-dimensional sound module  890 . According to an embodiment, the application  860  may transmit an activation control signal  845  to the three-dimensional sound module  890  to control the activation of the three-dimensional sound service. The activated three-dimensional sound module  890  may render audio information, which is received from a media playback module  880 , based on the received posture information  840  and transmit the rendered audio information to the Bluetooth (BT) communication module  850 . According to an embodiment, the Bluetooth communication module  850  may transmit the rendered audio information  895  to the wearable device  400 . 
       FIG. 9  is an exemplary diagram of an SPP message data according to an embodiment. 
     According to an embodiment disclosed herein, a wearable device (e.g., the wearable device  400  of  FIG. 4 ) may be connected to an electronic device (e.g., the electronic device  300  of  FIG. 3 ) by using a wireless communication network (e.g., the wireless communication network  230  of  FIG. 2 ), and may transmit a signal for controlling wireless communication in order to initiate or maintain wireless communication. According to an embodiment, the wearable device  400  may control wireless communication, and may include various pieces of data including rotation angle information of the wearable device  400  in one transmission unit (e.g., a packet) and transmit the same. According to an embodiment, the wireless communication performed by the wearable device  400  together with the electronic device  300  may be Bluetooth communication, and the wearable device  400  may generate a serial port profile (SPP) message  900  for controlling Bluetooth communication. According to an embodiment, the SPP message  900  may include Bluetooth SPP data (BT SPP Data)  911 , a time stamp  912 , second rotation angle information  913 , and latency check data (e.g., sequence information)  914  in one packet. According to an embodiment, the time stamp  912  may be information of a recorded system time when the SPP message  900  is transmitted, received, and/or processed. According to an embodiment, the time stamp  912  may be updated or configured in the electronic device  300  or the wearable device  400 , and may be updated or changed when the SPP message  900  is transmitted/received between devices or between functional elements within the same device. According to an embodiment, the second rotation angle information  913  may be information generated from a sensor of the wearable device  400  (e.g., the sensor  420  of  FIG. 4 ). The second rotation angle information may be, for example, information regarding the rotation angle of the wearable device  400  indicating the degree of rotation of the wearable device  400 . According to an embodiment, the processor  440  may generate angular velocity information, acceleration information, and/or position information of the wearable device  400  by controlling the sensor  420 , and may combine and/or compute the generated angular velocity information, acceleration information, and/or position information to generate rotation angle information (e.g., second rotation angle information) of the wearable device  400 . The rotation angle information may be information indicating the degree at which the wearable device  400  rotates with reference to virtual three-dimensional coordinates. The rotation angle information may be expressed as an angle, and the virtual three-dimensional coordinates may be formed with reference to at least a partial area of the wearable device  400 . The rotation angle information may include at least three types of rotation angles (e.g., R value, P value, and Y value) configuring three dimensions. According to an embodiment, the latency check data may be information for used identifying a delay time between the receiving of data (e.g., second rotation angle information) and then the processing of the received data (e.g., second rotation angle information). According to an embodiment, there is a possibility that a delay may occur depending on the actual system implementation, from the point in time when the electronic device  300  receives the second rotation angle information by using the short-range communication module  310  to the point in time when the second rotation angle information reaches a functional element (e.g., the application  860  of  FIG. 8 ) configured to correct the received second rotation angle information. Alternatively, a delay time may occur from the point in time when the second rotation angle information is received to the point in time when the processor  340  corrects the received second rotation angle information. In this case, latency check data may be used to identify the delay time that has occurred. According to an embodiment, the latency check data may be information for identifying a time delay taken for data transmission between two devices (e.g., the electronic device  300  and the wearable device  400 ). According to an embodiment, the latency check data may be information required to calculate a delay time taken for data from each functional element (e.g., the BT  850  in  FIG. 8 ) of the electronic device  300  to reach another functional element (e.g., the application  860  in  FIG. 8 ) thereof. For example, the latency check data may be unique information associated with specific data transmitted at a specific time point in the plurality of second rotation angle information transmitted in real time. According to an embodiment, the latency check data  914  may be unique data relating to one data transmission unit (e.g., a packet) transmitted by the wearable device  400 . According to an embodiment, the latency check data may be check data uniquely assigned to the second rotation angle information. According to an embodiment, the processor  340  may receive check data (e.g., latency check data) uniquely assigned to the second rotation angle information. When predetermined two packets include the identical latency check data, the processor may recognize that the two packets include the same data. The information related to the posture of the wearable device  400  may be, for example, second rotation angle information  913 , and the second rotation angle information  913  may include information regarding the rotation angle with reference to the three-dimensional coordinates of the wearable device  400  (e.g., yaw-pitch-roll (YPR) information). The latency check data  914  may be, for example, information (e.g., sequence information) regarding the sequence of signals (e.g., SPP message  900 ) and/or information transmitted by the wearable device  400  to the electronic device  300 . According to an embodiment, the processor  440  of the wearable device  400  may receive a signal (e.g., an SPP message  900 ) for controlling a wireless connection with the electronic device  300 , a time stamp  912  related to transmission, reception, or processing times of the SPP message  900 , and YPR data (e.g., second rotation angle information  913 ) and latency check data  914  of the wearable device  400 , by including the same in the same transmission unit (packet). According to an embodiment, different SPP messages (e.g., a first message  910 , a second message  920 , and/or a third message  930 ) may be sequentially and/or periodically generated from the wearable device  400  and transmitted to the electronic device  300 , and may include different pieces of latency check data. The electronic device  300  may identify whether the SPP messages correspond to the identical SPP data by using latency check data. According to an embodiment, the wearable device  400  may transmit the generated SPP message  900  to the electronic device  300 . 
       FIG. 10  is an exemplary diagram in which an electronic device calculates a delay time according to an embodiment. 
     Referring to  FIG. 10 , the wearable device  400  may generate an SPP message  1010  and transmit the SPP message to the electronic device  300 . According to an embodiment, the wearable device  400  may include an initial time stamp  1012  and latency check data  1014  in the SPP message  1010 . According to an embodiment, the initial time stamp  1012  may be configured with reference to the system time of the wearable device  400 , and for example, the system time of the wearable device  400  when transmission to the electronic device  300  occurs. According to an embodiment, the latency check data  1014  included in the designated SPP message  1010  may include unique latency check data. According to an embodiment, the time stamp of the SPP message  1020  transmitted to the electronic device  300  may be updated. For example, at a time when the Bluetooth communication module  850  of the electronic device  300  receives the SPP message  1010  transmitted by the wearable device  400 , the electronic device  300  may configure the first time stamp  1022 . The SPP message  1020  including the first time stamp  1022  may maintain latency check data  1024  as it is, and it is identified that the SPP message  1020  is identical to the SPP message  1010  transmitted from the wearable device  400  by using the identicalness of the latency check data. According to an embodiment, with regard to an SPP message  1030  transmitted to the application  860  through the service module  865 , the electronic device  300  may configure a second time stamp  1032  at a time when the SPP message is transmitted to the application  860  or a time when the second rotation angle information is corrected. According to an embodiment, the electronic device  300  may identify the identical SPP messages  1020  and  1030  by using the identical latency check data  1024  and  1034 , and may compare the first time stamp  1022  and the second time stamp  1032  between the identical SPP messages to calculate a delay time. According to an embodiment, the delay time may be calculated as the difference between the second time stamp  1032  and the first time stamp  1022 . According to an embodiment, the application  860  may correct the second rotation angle information based on the calculated delay time. 
       FIG. 11  is a flowchart illustrating an operation in which an electronic device learns a user movement pattern according to an embodiment. 
     An operation in which the electronic device (e.g., the electronic device  101  of  FIG. 1 , the electronic device  210  of  FIG. 2 , and/or the electronic device  300  of  FIG. 3 ) learns a user movement pattern may be described as operations of the processor (e.g., the processor  340  of  FIG. 3 ) included in the electronic device  300 . According to an embodiment, the operation of learning the user movement pattern may be understood as the operation of learning a pattern with respect to the rotation direction of the wearable device (e.g., the wearable device  220  of  FIG. 2  and/or the wearable device  400  of  FIG. 4 ). According to an embodiment, the processor  340  may learn a pattern with respect to the rotation direction of the wearable device  400 . The pattern with respect to the rotation direction may refer to, for example, a rotation direction of the wearable device  400  calculated in response to rotation angle information (e.g., second rotation angle information). 
     Referring to operation  1110 , the processor  340  may collect learning data, that is, information regarding a rotation state. According to an embodiment, the information regarding the rotation state may include a stationary state, a rotation state, a left/right rotation state, an up/down rotation state, or a combination thereof. The learning data may be, for example, information regarding various states of the user&#39;s head as a result of the rotation. According to an embodiment, the learning data may be information calculated using rotation angle information (e.g., first rotation angle information or second rotation angle information) or information regarding rotation states stored in advance in a memory (e.g., the memory  330  of  FIG. 3 ). According to an embodiment, the processor  340  may store the collected learning data in at least a partial area of the memory  330 . 
     Referring to operation  1120 , the processor  340  may determine basic data. According to an embodiment, the processor  340  may determine basic data that serves as a basis for learning the rotation direction pattern. The basic data may be, for example, a sensor value of the wearable device  400 , received from the wearable device  400 . According to an embodiment, the processor  340  may receive, from the wearable device  400 , an acceleration value generated by an acceleration sensor (e.g., the acceleration sensor  421  of  FIG. 4 ) and an angular velocity value generated by a gyro sensor (e.g., the gyro sensor  422  of  FIG. 4 ) of the wearable device  400  and store the same. The basic data determined by the processor  340  may include the acceleration value and angular velocity value of the wearable device  400 . According to an embodiment, the basic data may include a pre-stored rotation-enabling range, a system environment of the electronic device  300 , an operation mode of the processor  340 , or a type of an application being executed by the processor  340 . 
     Referring to operation  1130 , the processor  340  may extract a feature value. According to an embodiment, the processor  340  may extract a vector direction, which serves as the feature value of a rotation direction pattern and rotation angle information (e.g., a second rotation angle information) of the wearable device  400 , based on an acceleration value and an angular velocity value determined as basic data. According to an embodiment, the processor  340  may receive the second rotation angle information from the wearable device  400 , and may store the received second rotation angle information as a feature value. 
     Referring to operation  1140 , the processor  340  may learn the rotation direction based on the feature value. According to an embodiment, the processor  340  may learn the rotation direction based on the feature value extracted using an algorithm pre-stored in the memory  330  and the collected and stored learning data. 
     Referring to operation  1150 , the processor  340  may classify the learning data, and may store information regarding the rotation direction based on the classified learning data in the memory  330 . According to an embodiment, the processor  340  may correct the second rotation angle information based on the learned rotation direction data. According to an embodiment, the processor  340  may identify the rotation direction based on the learned data and the second rotation angle information. After identification of the rotation direction, the processor  340  may correct the second rotation angle information by using a rotation-enabling range corresponding to the rotation direction and/or a delay time. 
       FIG. 12  is an exemplary diagram in which an electronic device provides a three-dimensional sound service according to an embodiment. 
     Referring to  FIG. 12 , according to an embodiment, the electronic device  300  may use posture information in order to provide the three-dimensional sound service. According to an embodiment, when rendering the audio information, the electronic device  300  may render the audio information based on the generated posture information, or may render audio information based on a default value (stationary state) without using the posture information. According to an embodiment, the electronic device  300  may determine whether to provide the three-dimensional sound service or whether the three-dimensional sound service is required, by using the posture information. 
     When the electronic device  300  provides the three-dimensional sound service, it may be classified into three examples based on the rotation of the electronic device  300  and the rotation of the user&#39;s head (e.g., rotation of the wearable device). Referring to [a] of  FIG. 12 , when only the user (e.g., the user&#39;s head  500 ) rotates and the electronic device  300  is maintained at a first position  1210  in which the electronic device is first placed, the electronic device  300  provides the three-dimensional sound service, and thus the sound image may maintain the same second sound image  1211  as the existing first sound image  1200 . According to an embodiment, the three-dimensional sound service may be performed by changing the sound image with reference to in front of the user&#39;s head  500  and maintaining the sound image with reference to the location of the electronic device  300 . However, when the electronic device  300  rotates substantially simultaneously with the user&#39;s head and is changed to the second position  1220 , the three-dimensional sound service may be changed to output the sound image  1221  where the sound source is still in front, but is not directly in front, with reference to the user&#39;s posture. 
     Referring to [b] of  FIG. 12 , when the user&#39;s head  500  and the electronic device  300  rotate substantially simultaneously, the electronic device  300  rotates from a third position  1230  to a fourth position  1240 . However, the user&#39;s posture (e.g., the direction of the user&#39;s head  500 ) is also changed in the same manner, and thus the three-dimensional sound service may not be provided. In this case, the sound image may also be changed from the third sound image  1231  to a fourth sound image  1241  in the same manner as the user&#39;s posture (e.g., the direction of the user&#39;s head  500 ), but the electronic device  300  may transmit the same audio information to the wearable device  400  regardless of the posture information. 
     Referring to [c] of  FIG. 12 , when only the electronic device  300  rotates, the three-dimensional sound service may not be provided. When only the electronic device  300  rotates while the user&#39;s posture (e.g., the user&#39;s head  500 ) is stationary, the user (e.g., the user&#39;s head  500 ) may feel confused due to the sound image being changed even though the user is stationary. In this case, even though the electronic device  300  rotates from a fifth position  1250  to a sixth position  1260  without changing the sound image, the fifth sound image  1251  and the sixth sound image  1252  can be maintained to identically face the front of the user. 
       FIG. 13  is a flowchart illustrating an operation in which an electronic device provides a three-dimensional sound service according to an embodiment. 
     Referring to  FIG. 13 , an operation, in which an electronic device (e.g., the electronic device  101  of  FIG. 1 , the electronic device  210  of  FIG. 2 , and/or the electronic device  300  of  FIG. 3 ) provides the three-dimensional sound service, may be described as each operations performed by the processor  340  included in the electronic device  300 . 
     According to an embodiment, the processor  340  may use posture information to provide the three-dimensional sound service. According to an embodiment, when rendering audio information, the processor  340  may render the audio information based on the generated posture information, or may render the audio information based on a default value (stationary state) without using the posture information. According to an embodiment, the processor  340  may determine whether to provide the 3D sound service or whether the 3D sound service is required, by using the posture information. 
     Referring to operation  1310 , the processor  340  sense whether an external electronic device (e.g., the wearable device  400  of  FIG. 4 ) is rotated. According to an embodiment, the posture information may be generated based on rotation angle information (e.g., first rotation angle information) of the electronic device  300  and rotation angle information (e.g., second rotation angle information) of the wearable device  400 . According to an embodiment, when rotation of the wearable device  400  is sensed, the processor  340  may determine that the user&#39;s movement has occurred, and may determine that it is necessary to provide the three-dimensional sound service. According to an embodiment, when rotation of the wearable device  400  is sensed, the processor  340  may render audio information based on the posture information. When rotation of the wearable device  400  is sensed, the processor  340  may proceed to operation  1320 . Alternatively, when the rotation of the wearable device  400  is not sensed, the processor  340  may proceed to operation  1340 . 
     Referring to operation  1320 , the processor  340  may sense whether the electronic device  300  is rotated. According to an embodiment, when the rotation of the electronic device  300  is sensed substantially simultaneously with the rotation of the wearable device  400 , the processor  340  may determine that there is no need to provide the three-dimensional sound service. According to an embodiment, when the electronic device  300  rotates substantially simultaneously with the wearable device  400 , the electronic device  300  may move together with the user. In this case, it may not be necessary to provide a three-dimensional sound service. Alternatively, when the rotation of the electronic device  300  occurs substantially simultaneously with the rotation of the wearable device  400 , there is a risk that the three-dimensional sound service causes confusion to a user who is listening and thus, the processor  340  may stop providing the three-dimensional sound service. When the rotation of the electronic device  300  is not sensed, the processor  340  proceeds to operation  1330 . Alternatively, when the rotation of the electronic device  300  is sensed, the processor  340  may proceed to operation  1340 . 
     Referring to operation  1330 , the processor  340  may render audio information based on the posture information. According to an embodiment, when the rotation of the wearable device  400  is sensed and when the rotation of the electronic device  300  is not sensed, the processor  340  may render audio information by using the generated posture information. 
     Referring to operation  1340 , the processor  340  may render audio information using a default value. According to an embodiment, when it is determined that the three-dimensional sound service is unnecessary, that is, when the rotation of the wearable device  400  is not sensed or when the rotation of the electronic device  300  occurs substantially simultaneously with the rotation of the wearable device  400 , the processor  340  may render or not the audio information using a preset default value, without rendering the audio information based on the posture information. 
     The electronic device  300  according to an embodiment disclosed herein may include a sensor  320 , a short-range communication module  310  configured to perform short-distance communication with an external electronic device; and a processor  340  operatively connected to the short-range communication module  310 , wherein the processor  340  is configured to generate first rotation angle information by using the sensor  320 , establish a connection to the external electronic device by using the short-range communication module  310 , receive, from the external electronic device, second rotation angle information and check data uniquely assigned to the second rotation angle information, configure a first time stamp based on the check data and a time of receiving the second rotation angle information, configure a second time stamp based on the check data and a time of correcting the second rotation angle information, compare the first time stamp and the second time stamp to calculate a delay time from the time of receiving the second rotation angle information to the time of correcting the second rotation angle information, correct the second rotation angle information based on the delay time, and generate posture information based on the first rotation angle information and the corrected second rotation angle information. 
     Further, the processor  340  may be configured to render audio information based on the posture information, and transmit the rendered audio information to the external electronic device. 
     Further, the processor  340  may be configured to render the audio information based on the posture information when only rotation of the external electronic device is sensed, and render the audio information using a preset default value of the audio information when rotation of the electronic device  300  is sensed together with the rotation of the external electronic device. 
     In addition, the second rotation angle information includes a yaw value, a pitch value, and a roll value representing rotation angles of the external electronic device, and the processor may be configured to generate a variance in the rotation angles of the external electronic device. 
     In addition, the processor  340  may be configured to calculate a correction value for the second rotation angle information based on the calculated delay time and the variance in the rotation angles of the external electronic device, and correct the second rotation angle information by applying the calculated correction value to the second rotation angle information. 
     In addition, the electronic device may further include a memory  330  operatively connected to the processor  340 , wherein the processor  340  is configured to identify context information, store the delay time corresponding to the context information in the memory  330 , identify the delay time based on the stored context information, and correct the second rotation angle information based on the identified delay time. 
     In addition, wherein the context information includes the type of an application being executed by the processor and a data processing mode of the processor  340 . 
     In addition, the electronic device may further include a memory  330  operatively connected to the processor  340 , wherein the processor  340  is configured to learn a rotation direction pattern of the external electronic device based on the second rotation angle information, using a learning algorithm stored in the memory, and store pattern information regarding the rotation direction pattern in the memory  330 . 
     In addition, the electronic device may further include a memory  330  operatively connected to the processor  340 , wherein the processor  340  is configured to calculate a rotation direction of the external electronic device based on the second rotation angle information, identify rotation-enabling range information corresponding to the rotation direction pre-stored in the memory  330 , and correct the second rotation angle information based on the rotation-enabling range information. 
     In addition, the processor  340  may be configured to detect multiple short-range wireless signals, which are output from multiple components of the external electronic device, by using the sensor  320 , measure distances between each of the multiple components of the external electronic device and the electronic device, based on the detected multiple short-range wireless signals, and correct the second rotation angle information based on the measured distances between each of the multiple components of the external electronic device and the electronic device. 
     A method for providing three-dimensional sound by an electronic device  300  according to an embodiment disclosed herein may include: generating first rotation angle information; establishing a connection to an external electronic device; receiving second rotation angle information and check data uniquely assigned to the second rotation angle information from the external electronic device; configuring a first time stamp based on a time of receiving the second rotation angle information and the check data; configuring a second time stamp based on a time of correcting the second rotation angle information and the check data; comparing the first time stamp and the second time stamp to calculate a delay time from the time of receiving the second rotation angle information to the time of correcting the second rotation angle information; correcting second rotation angle information based on the delay time; and generating posture information based on the first rotation angle information and the corrected second rotation angle information. Further, the method may further include rendering audio information based on the posture information, and transmitting the rendered audio information to the external electronic device. 
     Further, the rendering of the audio information may include rendering the audio information based on the posture information when only rotation of the external electronic device is sensed, and rendering the audio information using a preset default value of the audio information when rotation of the electronic device is detected together with the rotation of the external electronic device. 
     Further, the second rotation angle information may include a yaw value, a pitch value, and a roll value representing rotation angles of the external electronic device, and the method may further include generating a variance in the rotation angles of the external electronic device. 
     In addition, the correcting of second rotation angle information may further include calculating a correction value for the second rotation angle information based on the calculated delay time and the variance in the rotation angles of the external electronic device, and applying the calculated correction value to the second rotation angle information to correct the second rotation angle information. 
     In addition, the method may include identifying context information, storing the delay time corresponding to the context information, identifying the delay time based on the stored context information, and correcting the second rotation angle information based on the identified delay time. 
     In addition, the method may include learning a rotation direction pattern of the external electronic device based on the second rotation angle information, by using a pre-stored learning algorithm, and storing pattern information regarding the rotation direction pattern. 
     In addition, the method may include calculating a rotation direction of the external electronic device based on the second rotation angle information, identifying rotation-enabling range information corresponding to the rotation direction, and correcting the second rotation angle information based on the rotation-enabling range information. 
     An electronic device  400  according to various embodiments disclosed herein may include: a short-range communication module  410  configured to perform short-distance communication with an external electronic device; a sensor  420  for sensing a rotation angle of the electronic device  400 ; and a processor  440  operatively connected to the short-range communication module  410  and the sensor  420 , wherein the processor  440  is configured to generate rotation angle information regarding the rotation angle of the electronic device  400 , by using the sensor, generate check data uniquely assigned to the rotation angle information in response to generating the rotation angle information, and transmit the rotation angle information and the check data to the external electronic device by using the short-range communication module  410 . 
     In addition, the electronic device may further include speaker  430  operatively connected to the processor  440 , wherein the processor  440  is configured to receive audio information from the external electronic device by using the short-range communication module  410 , and output a sound to the speaker  430  based on the audio information. 
     The electronic device according to various embodiments may be one of various types of electronic devices. The electronic devices may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. According to an embodiment of the disclosure, the electronic devices are not limited to those described above. 
     It should be appreciated that various embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, each of such phrases as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B, or C,” “at least one of A, B, and C,” and “at least one of A, B, or C,” may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “1st” and “2nd,” or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” “connected with,” or “connected to” another element (e.g., a second element), it means that the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used in connection with various embodiments of the disclosure, the term “module” may include a unit implemented in hardware, software, or firmware, and may interchangeably be used with other terms, for example, “logic,” “logic block,” “part,” or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. For example, according to an embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Various embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., internal memory  136  or external memory  138 ) that is readable by a machine (e.g., the electronic device  101 ). For example, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it, with or without using one or more other components under the control of the processor. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a compiler or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Wherein, the term “non-transitory” simply means that the storage medium is a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an embodiment, a method according to various embodiments of the disclosure may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smart phones) directly. If distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     According to various embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. According to various embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, according to various embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to various embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
     Certain of the above-described embodiments of the present disclosure can be implemented in hardware, firmware or via the execution of software or computer code that can be stored in a recording medium such as a CD ROM, a Digital Versatile Disc (DVD), a magnetic tape, a RAM, a floppy disk, a hard disk, or a magneto-optical disk or computer code downloaded over a network originally stored on a remote recording medium or a non-transitory machine readable medium and to be stored on a local recording medium, so that the methods described herein can be rendered via such software that is stored on the recording medium using a general purpose computer, or a special processor or in programmable or dedicated hardware, such as an ASIC or FPGA. As would be understood in the art, the computer, the processor, microprocessor controller or the programmable hardware include memory components, e.g., RAM, ROM, Flash, etc. that may store or receive software or computer code that when accessed and executed by the computer, processor or hardware implement the processing methods described herein. 
     While the present disclosure has been shown and described with reference to various embodiments thereof, 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 present disclosure as defined by the appended claims and their equivalents.