Patent Publication Number: US-2021185102-A1

Title: Server in multipoint communication system, and operating method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This U.S. non-provisional application claims the benefit of priority under 35 U.S.C. § 119 to Korean Patent Application Nos. 10-2019-0168052 filed on Dec. 16, 2019 and 10-2019-0168053 filed on Dec. 16, 2019, the entire contents of which are incorporated herein by reference in their entirety. 
     BACKGROUND 
     Technical Field 
     One or more example embodiments relate to servers of a multipoint communication system, and particularly to servers of a conference call system and/or operating methods thereof. 
     Related Art 
     With the development in communication technology, a conference call as well as a one-to-one call is enabled. Through this, a plurality of electronic devices may exchange content or information and may perform a voice call or a video call through a communication protocol, such as voice over Internet protocol (VoIP). Here, the server supports a conference call between electronic devices such that the electronic devices may perform the conference call. That is, the server allows voice uttered from at least one user among users of the electronic devices to be shared between the electronic devices. 
     Here, to acquire voice uttered from at least one user among users of the electronic devices, the server needs to decode packets received from all of the electronic devices. Meanwhile, the server needs to encode audio data several times to transmit the audio data to the electronic devices. That is, the server needs to encode audio data a number of times corresponding to a number of the electronic devices. Accordingly, relatively great load may occur in the server. Here, the load of the server may be proportional to a number of electronic devices connected to the server for a conference call. That is, according to an increase in the number of electronic devices, load on the server may increase. 
     SUMMARY 
     Some example embodiments provide systems that decrease load on a server in a conference call environment and/or operating methods thereof. 
     Some example embodiments provide systems that allow a server to support a conference call between a plurality of electronic devices without decoding all of the packets received from the electronic devices and/or operating methods thereof. 
     Some example embodiments provide systems that allow a server to support a conference call between a plurality of electronic devices without encoding audio data a number of times corresponding to a number of electronic devices to generate packets for the electronic devices, respectively, and/or operating methods thereof. 
     According to an example embodiment, an operating method of a server that supports a conference call between a plurality of electronic devices includes receiving a packet from each of the electronic devices, detecting audio related information from a header of the received packet, determining whether to decode a payload of the received packet based on the audio related information, and detecting an audio signal by decoding the payload. 
     According to an example embodiment, a server includes and a processor configured to execute the computer-readable instructions included in a memory to support a conference call between the electronic devices such that the processor is configured to receive a packet from each of the electronic devices, detect audio related information from a header of the received packet, determine whether to decode a payload of the received packet based on the audio related information, and detect an audio signal by decoding the payload. 
     According to some example embodiments, a server may support a conference call between a plurality of electronic devices without a need to decode all of packets received from the electronic devices. That is, the server may decode only at least one of packets received from the electronic devices to acquire voice uttered from at least one user among users of the electronic devices. That is, the server does not need to decode all of the packets received from the electronic devices since the server may determine whether an audio signal is detectable from a payload by simply parsing a header of each packet. Accordingly, load on the server may decrease in a conference call environment. 
     According to some example embodiments, a number of times a server performs encoding may decrease. That is, by simply performing encoding once, the server may generate packets for the respective electronic devices. Therefore, the server does not need to encode audio data. Accordingly, the server does not need to encode audio data a number of times corresponding to a number of the electronic devices. Through this, load on the server may decrease. 
     Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an example of a system in a conference call environment; 
         FIG. 2  illustrates an example of a signal flow in a general system; 
         FIG. 3  illustrates another example of a signal flow in a general system; 
         FIG. 4  illustrates an example of describing an operation of a server of  FIG. 3 ; 
         FIG. 5  illustrates an example of a signal flow in a system according to an example embodiment; 
         FIG. 6  illustrates another example of a signal flow in a system according to an example embodiment; 
         FIG. 7  illustrates an example of describing an operation of a server of  FIG. 6 ; 
         FIG. 8  is a diagram illustrating an example of a server according to an example embodiment; 
         FIG. 9  is a flowchart illustrating an example of an operating method of a server according to an example embodiment; 
         FIG. 10  is a flowchart illustrating another example of an operating method of a server according to an example embodiment; 
         FIG. 11  is a flowchart illustrating an audio data generation operation of  FIG. 10 ; 
         FIG. 12  is a flowchart illustrating an example of a packet control operation of  FIG. 10 ; 
         FIG. 13  is a diagram illustrating an example of an electronic device according to an example embodiment; and 
         FIG. 14  is a flowchart illustrating an example of an operating method of an electronic device according to an example embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     One or more example embodiments will be described in detail with reference to the accompanying drawings. Example embodiments, however, may be embodied in various different forms, and should not be construed as being limited to only the illustrated example embodiments. Rather, the illustrated example embodiments are provided as examples so that this disclosure will be thorough and complete, and will fully convey the concepts of this disclosure to those skilled in the art. Accordingly, known processes, elements, and techniques, may not be described with respect to some example embodiments. Unless otherwise noted, like reference characters denote like elements throughout the attached drawings and written description, and thus descriptions will not be repeated. 
     As used herein, the singular forms “a,” “an,” and “the,” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups, thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed products. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. Also, the term “exemplary” is intended to refer to an example or illustration. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. Terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and/or this disclosure, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     Software may include a computer program, program code, instructions, or some combination thereof, for independently or collectively instructing or configuring a hardware device to operate as desired. The computer program and/or program code may include program or computer-readable instructions, software components, software modules, data files, data structures, and/or the like, capable of being implemented by one or more hardware devices, such as one or more of the hardware devices mentioned above. Examples of program code include both machine code produced by a compiler and higher level program code that is executed using an interpreter. 
     A hardware device, such as a computer processing device, may run an operating system (OS) and one or more software applications that run on the OS. The computer processing device also may access, store, manipulate, process, and create data in response to execution of the software. For simplicity, one or more example embodiments may be exemplified as one computer processing device; however, one skilled in the art will appreciate that a hardware device may include multiple processing elements and multiple types of processing elements. For example, a hardware device may include multiple processors or a processor and a controller. In addition, other processing configurations are possible, such as parallel processors. 
     Although described with reference to specific examples and drawings, modifications, additions and substitutions of the disclosed example embodiments may be variously made according to the description by those of ordinary skill in the art. For example, the described techniques may be performed in an order different with that of the methods described, and/or components such as the described system, architecture, devices, circuit, and the like, may be connected or combined to be different from the above-described methods, or results may be appropriately achieved by other components or equivalents. 
     Hereinafter, some example embodiments will be described with reference to the accompanying drawings. 
       FIG. 1  is a diagram illustrating a system  100  in a conference call environment. 
     Referring to  FIG. 1 , the system  100  in the conference call environment may include a plurality of electronic devices  110  and at least one server  120 . The electronic devices  110  and the server  120  may communicate with each other over a network  130 . For example, the network  130  may include at least one of a wired communication network and a wireless communication network. Through this, the electronic devices  110  may perform a conference call through the network  130  and the server  120  may support the conference call between the electronic devices  110  through the network  130 . 
     During the conference call, each electronic device  110  may collect a signal and may transmit the collected signal to the server  120 . The server  120  may mix signals received from the electronic devices  110  and may transmit a result signal to each of the electronic devices  110 . Through this, the server  120  may allow voice uttered from at least one user among users of the electronic devices  110  to be shared between the electronic devices  110 . Here, at least one of the electronic devices  110  may output voice uttered from at least one another user among the users of the electronic devices  110 . Here, at least one user among the users of the electronic devices  110  may be referred to as an utterer that acquires voice uttered from the user and at least one user among the users of the electronic devices  110  may be referred to as a listener to which the voice is output. At a specific time, each of the electronic devices  110  may be either an utterer or a listener, or may be both an utterer and a listener. 
     For example, the electronic devices  110  may include a first electronic device, a second electronic device, and a third electronic device. Each of the first electronic device, the second electronic device, and the third electronic device may collect signals and may transmit the collected signals to the server  120 . For example, the first electronic device may acquire an audio signal including voice uttered from a user and may transmit the acquired audio signal to the server  120 . In this case, the server  120  may transmit an audio signal received from the first electronic device to the second electronic device and the third electronic device. Here, the first electronic device may be an utterer and each of the second electronic device and the third electronic device may be a listener. As another example, each of the first electronic device and the second electronic device may acquire an audio signal that includes voice uttered from a corresponding user and may transmit the acquired audio signal to the server  120 . In this case, the server  120  may mix the audio signals received from the first electronic device and the second electronic device and may transmit a result signal to the third electronic device. In addition, the server  120  may transmit the audio signal received from the first electronic device to the second electronic device and may transmit the audio signal received from the second electronic device to the first electronic device. Here, each of the first electronic device and the second electronic device may be both an utterer and a listener, and the third electronic device may be a listener. 
     For example, the electronic devices  110  may be various types of devices. The electronic devices  110  may include, for example, at least one of a portable communication device (e.g., a smartphone), a computer apparatus, a portable multimedia device, a portable medical device, a camera, a wearable device, and a home appliance. However, it is provided as an example only. 
       FIG. 2  illustrates an example of a signal flow of a general system  200  (e.g., the system  100  of  FIG. 1 ). 
     Referring to  FIG. 2 , the general system  200  may include a plurality of electronic devices  210  (e.g., the electronic device  110  of  FIG. 1 ) and at least one server  220  (e.g., the server  120  of  FIG. 1 ). For a conference call, each electronic device  210  and the server  220  may be connected in operation  230 . Here, the electronic device  210  and the server  220  may be connected based on a predefined communication scheme through a network (e.g., the network  130  of  FIG. 1 ). 
     In operation  241 , the electronic device  210  may collect a signal. To acquire voice uttered from a user, the electronic device  210  may collect a signal. In operation  243 , the electronic device  210  may generate a packet that includes an encoded signal. To this end, the electronic device  210  may encode the collected signal. For example, the electronic device  210  may encode the collected signal at an interval of a desired (or alternatively, preset) time length. In operation  250 , the electronic device  210  may transmit the packet to the server  220 . 
     In operation  250 , the server  220  may receive the packet from the electronic device  210 . In response thereto, the server  220  may decode the packet in operation  261 . Through this, the server  220  may recover, from the packet, the signal collected by the electronic device  210 . In operation  263 , the server  220  may analyze the recovered signal. In operation  265 , the server  220  may determine whether the recovered signal is an audio signal. When it is determined that the recovered signal is the audio signal in operation  265 , the server  220  may mix the audio signal in operation  267 . The server  220  may mix an audio signal of at least one of the electronic devices  210 . Through this, the server  220  may acquire voice uttered from at least one user among users of the electronic devices  210 . When it is determined that the recovered signal is not the audio signal in operation  265 , the server  220  may ignore the recovered signal. 
     According to the general system  200 , the server  220  needs to decode packets received from all of the electronic devices  210  to acquire voice uttered from at least one user among the users of the electronic devices  210 . Therefore, relatively great load may occur on the server  220 . Here, load on the server  220  may be proportional to a number of the electronic devices  210  connected to the server  220  for a conference call. That is, load on the server  220  may increase according to an increase in the number of electronic devices  210 . 
       FIG. 3  illustrates an example of a signal flow in a general system  300  (e.g., the system  100  of  FIG. 1 ), and  FIG. 4  illustrates an example of describing an operation of a server  320  (e.g., the server  120  of  FIG. 1 ) of  FIG. 3 . 
     Referring to  FIG. 3 , the general system  300  may include a plurality of electronic devices  310  (e.g., the electronic device  110  of  FIG. 1 ) and at least one server  320 . In operation  330 , the electronic devices  310  and the server  320  may be connected for a conference call. Here, each electronic device  310  and the server  320  may be connected based on a predefined communication scheme through a network (e.g., the network  130  of  FIG. 1 ). During the connection to the electronic devices  310 , the server  320  may verify network states in connection with the respective electronic devices  310 . 
     Referring to  FIGS. 3 and 4 , in operation  350 , the server  320  may generate audio data  450 . Here, for sharing with at least one of the electronic devices  310 , the server  320  may generate the audio data  450 . 
     In operation  370 , the server  320  may encode the audio data  450  in correspondence to each of the electronic devices  310 . Through this, the server  320  may generate a plurality of packets  471 ,  473 , and  475  respectively corresponding to the electronic devices  310 . Here, the server  320  may encode the audio data  450  by controlling a transfer rate of each electronic device  310 . The server  320  may control a transfer rate based on a network state of each corresponding electronic device  310 . 
     In operation  390 , the server  320  may transmit the packets  471 ,  473 , and  475  to the respective corresponding electronic devices  310 . 
     According to the general system  300 , great load may occur on the server  320 . Here, an encoding operation occupies a great part in load on the server  320 . The server  320  needs to encode the audio data  450  a number of times corresponding to the number of electronic devices  310 . Therefore, load on the server  320  may be proportional to the number of electronic devices  310  connected to the server  320  for a conference call. That is, as the number of electronic devices  310  increases, the load on the server  320  may also increase. 
       FIG. 5  illustrates an example of a signal flow in a system  500  (e.g., the system  100  of  FIG. 1 ) according to an example embodiment. 
     Referring to  FIG. 5 , the system  500  according to an example embodiment may include a plurality of electronic devices  510  (e.g., the electronic device  110 ) and at least one server  520  (e.g., the server  120  of  FIG. 1 ). For a conference call, each electronic device  510  and the server  520  may be connected in operation  530 . Here, the electronic device  510  and the server  520  may be connected based on a predefined communication scheme through a network (e.g., the network  130  of  FIG. 1 ). 
     In operation S 541 , the electronic device  510  may collect a signal. According to an example embodiment, the electronic device  510  may collect an ambient signal to acquire voice uttered from a user. According to another example embodiment, the electronic device  510  may collect a signal from voice synthesized based on a text generated by the user or a text pre-stored in the electronic device  510 . According to another example embodiment, the electronic device  510  may collect a signal from at least one of a pre-stored audio file and an audio file received from an external apparatus (not shown). In operation  543 , the electronic device  510  may detect audio related information from the collected signal. For example, the electronic device  510  may detect audio related information from the collected signal at an interval corresponding to a desired (or alternatively, preset) time length. Here, the audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the collected signal into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an average energy level of collected signals or an energy level for each section. In operation  545 , the electronic device  510  may configure a header that includes the audio related information and a payload that includes an encoded signal. For example, the electronic device  510  may encode the collected signal to include the header and the payload. In operation  550 , the electronic device  510  may transmit, to the server  520 , a packet that includes the header and the payload. 
     In operation  550 , the server  520  may receive the packet from the electronic device  510 . In operation  561 , the server  520  may verify the audio related information by parsing the header of the packet. In operation  563 , the server  520  may determine whether to decode the payload of the packet based on the audio related information. Here, the server  520  may determine whether to decode the payload based on at least one of the audio activity information and the energy level information, which is included in the header as the audio related information. The server  520  may determine whether the encoded signal of the payload is generated from the audio signal, based on the audio related information. When the payload is determined to be decoded in operation  563 , the server  520  may decode the payload in operation  565 . Through this, the server  520  may detect, from the payload, an audio signal that includes at least one of voice and music. According to an example embodiment, the server  520  may acquire voice uttered from at least one user among users of the electronic devices  510 . According to another example embodiment, the server  520  may acquire voice synthesized by at least one of the electronic devices  510 . According to another example embodiment, the server  520  may acquire an audio file from at least one of the electronic devices  510 . In operation  567 , the server  520  may mix the audio signal. The server  520  may mix an audio signal of at least one of the electronic devices  510 . When the payload is determined to not be decoded in operation  563 , the server  520  may not decode and ignore the payload. 
     According to an example embodiment, the server  520  may support a conference call between the plurality of electronic devices  510  without a need to decode all of the packets received from the electronic devices  510 . That is, to detect an audio signal from at least one of the electronic devices  510 , the server  520  decodes only at least one of the packets received from the electronic devices  510 . That is, the server  520  does not need to decode all of the packets received from the electronic devices  510  because the server  520  may determine whether to detect an audio signal from a corresponding payload by simply parsing a header of each packet. Therefore, in a conference call environment, load on the server  520  may decrease. 
       FIG. 6  illustrates an example of a signal flow in a system  600  (e.g., the system  100  of  FIG. 1 ) according to an example embodiment, and  FIG. 7  illustrates an example of describing an operation of a server  620  (e.g., the server  120  of  FIG. 1 ) of  FIG. 6 . 
     Referring to  FIG. 6 , the system  600  according to an example embodiment may include a plurality of electronic devices  610  (e.g., the electronic device  110  of  FIG. 1 ) and at least one server  620 . In operation  630 , each electronic device  610  and the server  620  may be connected for a conference call. Here, the electronic device  610  and the server  620  may be connected based on a predefined communication scheme through a network (e.g., the network  130  of  FIG. 1 ). During connection to the electronic devices  610 , the server  620  may verify network states in connection with the respective electronic devices  610 . Here, the server  620  may verify the network states based on signals received from the electronic devices  610 , respectively. 
     In operation  650 , the server  620  may generate audio data  750 . Here, for sharing with at least one of the electronic devices  610 , the server  620  may generate the audio data  750  of  FIG. 7 . Here, the server  620  may verify audio related information with respect to the audio data  750 . Here, the audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the audio data  750  into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an energy level of the audio data  750 . According to an example embodiment, the server  620  may generate the audio data  750  based on data received from another server (not shown). According to another example embodiment, the server  620  may generate the audio data  750  based on at least one packet received from at least one of the electronic devices  610 . 
     In operation  670 , the server  620  may encode the audio data  750 . Through this, the server  620  may generate a single encoded packet  770  of  FIG. 7 . Here, the encoded packet  770  may include a plurality of sections. Here, the server  620  may acquire audio related information for each of the sections. 
     In operation  680 , the server  620  may control the encoded packet  770  in correspondence to each of the electronic devices  610 . Through this, the server  620  may convert the encoded packet  770  to a plurality of packets  781 ,  783 , and  785  respectively corresponding to the electronic devices  610 . Here, the server  620  may control a transfer rate of the encoded packet  770  for each electronic device  610 . The server  620  may also control a transfer rate of the encoded packet  770  based on a network state of each electronic device  610 . Here, the server  620  may control the encoded packet  770  based on the audio related information of the encoded packet  770 . 
     In operation  690 , the server  620  may transmit the packets  781 ,  783 , and  785  to the respective corresponding electronic devices  610 . 
     According to an example embodiment, a number of times the server  620  performs encoding may decrease. That is, by simply performing encoding once, the server  620  may generate the packets  781 ,  783 , and  785  for the respective electronic devices  610 . Therefore, the server  620  does not need to encode the audio data  750  a number of times corresponding to the number of electronic devices  610 . Through this, the load on the server  620  may decrease. 
       FIG. 8  is a diagram illustrating an example of a server  800  (e.g., the server  120  of  FIG. 1 , the server  520  of  FIG. 5 , and the server  620  of  FIG. 6 ) according to an example embodiment. 
     Referring to  FIG. 8 , the server  800  according to an example embodiment may include at least one of a communication module  810 , a memory  820 , and a processor  830 . Depending on some example embodiments, at least one component may be omitted from components of the server  800  or at least one another component may be added thereto. 
     The communication module  810  may communicate with an external apparatus (not shown) in the server  800 . The communication module  810  may establish a communication channel between the server  800  and the external apparatus and may communicate with the external apparatus through the communication channel. The communication module  810  may include at least one of a wired communication module and a wireless communication module. For example, the wireless communication module may communicate with the external apparatus through at least one of a far-field communication network and a near-field communication network. The communication module  810  may be included in the processor  830 . The ranking detector  831 , the decoder  833 , the mixer  825 , the encoder  837 , and the transfer rate controller  839 , as well as the communication module  810  may be functional units of the processor  830 . However, the processor  830  is not intended to be limited to the disclosed functional units. In some example embodiments, additional functional units may be included in the processor  830 . Further, the processor  830  may perform the operations and/or functions of the various functional units without sub-dividing the operations and/or functions of the various functional units into these various functional units. The processor  830  may include hardware including logic circuits or a hardware/software combination (e.g., processing circuitry). For example, the processing circuitry more specifically may include, but is not limited to, a central processing unit (CPU), an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a System-on-Chip (SoC), a programmable logic unit, a microprocessor, application-specific integrated circuit (ASIC), etc. 
     The memory  820  may store a variety of data used by at least one component of the server  800 . For example, the memory  820  may include at least one of a volatile memory and a non-volatile memory. Data may include input data or output data about a program or an instruction related thereto. The program may be stored in the memory  820  as software and may include at least one of an OS and middleware. The program may include a program for supporting a conference call. 
     The processor  830  may control at least one component of the server  800  and may perform data processing or operation by executing the program of the memory  820 . The program may include the program for supporting the conference call. Here, the processor  830  may support the conference call between a plurality of electronic devices (e.g., the electronic device  110  of  FIG. 1 , the electronic device  510  of  FIG. 5 , and the electronic device  610  of  FIG. 6 ). For example, the processor  830  may connect to each of the electronic devices (e.g., the electronic device  110  of  FIG. 1 , the electronic device  510  of  FIG. 5 , and the electronic device  610  of  FIG. 6 ) through the communication module  810 . For example, the processor  830  may include at least one of a ranking detector  831 , a decoder  833 , a mixer  835 , an encoder  837 , and a transfer rate controller  839 . 
     During supporting of the conference call, the processor  830  may receive packets from the respective electronic devices  310  through the communication module  810 . In response thereto, the processor  830  may verify audio related information by parsing a header of each packet. Through this, the processor  830  may determine whether to decode a payload of a corresponding packet based on the audio related information. Here, the processor  830  may determine whether to decode a payload of the corresponding packet based on at least one of audio activity information and energy level information. The processor  830  may determine whether an encoded signal of the payload is generated from an audio signal that includes at least one of voice and music, based on the audio related information. 
     According to an example embodiment, the processor  830  may detect a ranking of each electronic device (e.g., the electronic device  510  of  FIG. 5 ) among the electronic devices (e.g., the electronic device  510  of  FIG. 5 ). For example, the ranking detector  831  may detect a ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the audio related information. Here, the ranking detector  831  may assign a score to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the audio related information and may detect a ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the score. For example, the ranking detector  831  may detect the ranking of the corresponding electronic device as being relatively high according to an increase in the score and may detect the ranking of the corresponding electronic device as being relatively low according to a decrease in the score. If the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is greater than or equal to a desired (or alternatively, preset) threshold ranking, the ranking detector  831  may determine that the payload of the corresponding packet is to be decoded. On the contrary, if the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is less than the threshold ranking, the ranking detector  831  may determine that the payload of the corresponding packet does not need to be decoded. 
     For example, if the audio activity information represents one of voice (voiced or unvoiced), silent, music, and noise, the ranking detector  831  may assign one of +1, 0, and −1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score based on the audio activity information. As another example, if the energy level information exceeds a desired (or alternatively, preset) threshold, for example, −30 dBfs, the ranking detector  831  may assign +2 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score. If the energy level information is less than or equal to the threshold, for example, −30 dBfs, the processor  830  may assign +1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score. As another example, if the audio activity information represents voice or music, the ranking detector  831  may assign +2 or +1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score depending on whether the energy level information exceeds the threshold. If the audio activity information represents silent or noise, the ranking detector  831  may assign 0 or −1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score. 
     If the payload is determined to be decoded in the above manner, the processor  830  may decode the payload. Here, the decoder  833  may decode the payload. Through this, the processor  830  may detect, from the payload, an audio signal that includes at least one of voice and music. According to an example embodiment, the processor  830  may acquire voice uttered from at least one user among users of the electronic devices (e.g., the electronic device  510  of  FIG. 5 ). According to another example embodiment, the processor  830  may acquire voice synthesized in at least one of the electronic devices (e.g., the electronic device  510  of  FIG. 5 ). According to another example embodiment, the processor  830  may acquire an audio file from at least one of the electronic devices (e.g., the electronic device  510  of  FIG. 5 ). That is, the processor  830  may acquire voice uttered from the user of the electronic device (e.g., the electronic device  510  of  FIG. 5 ). The processor  830  may mix an audio signal. Here, the mixer  835  may mix the audio signal with an audio signal of at least one another electronic device (e.g., the electronic device  510  of  FIG. 5 ). Meanwhile, if the payload is determined to not be decoded, the processor  830  may not decode the payload and may ignore the payload. 
     During supporting of the conference call, the processor  830  may generate a packet that includes an encoded audio signal. For example, the encoder  837  may encode an audio signal. Here, the encoder  837  may encode the mixed audio signal and may transmit the packet to at least one of the electronic devices (e.g., the electronic device  510  of  FIG. 5 ) through the communication module  810 . 
     During supporting of the conference call, the processor  830  may verify network states in connection with the respective electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Here, the processor  830  may verify the network states based on signals received from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively, through the communication module  810 . For example, during connection to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), the processor  830  may verify network states based on packets received from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively. For example, the processor  830  may verify a network state of each electronic device (e.g., the electronic device  610  of  FIG. 6 ) based on received signal strength of each corresponding packet. 
     The processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ). Here, for sharing with at least one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), the processor  830  may generate the audio data (e.g., the audio data  750  of  FIG. 7 ). Here, the processor  830  may verify audio related information with respect to the audio data (e.g., the audio data  750  of  FIG. 7 ). The audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the audio data (e.g., the audio data  750  of  FIG. 7 ) into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an energy level of the audio data (e.g., the audio data  750  of  FIG. 7 ). 
     According to an example embodiment, the processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ) based on data received from another server (not shown). For example, the processor  830  may receive encoded data from the other server. Here, the decoder  833  may decode the encoded data. Through this, the processor  830  may generate the audio data (e.g., the audio data  750  of  FIG. 7 ). 
     According to another example embodiment, the processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ) based on at least one packet received from at least one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect an ambient signal to acquire voice uttered from the user. As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from voice synthesized based on a text generated by the user or a text pre-stored in the corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from at least one of a pre-stored audio file and an audio file received from an external apparatus (not shown). The electronic device (e.g., the electronic device  610  of  FIG. 6 ) may generate a packet by encoding the collected signal and may transmit the generated packet to the server  800 . The processor  830  may receive the packet and may recover, from the packet, the signal collected by the electronic device (e.g., the electronic device  610  of  FIG. 6 ). For example, the decoder  833  may decode the packet. In this manner, the processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ) using the signal collected by each of at least one electronic device (e.g., the electronic device  610  of  FIG. 6 ). For example, the mixer  835  may mix signals collected by at least two electronic devices (e.g., the electronic device  610  of  FIG. 6 ). 
     The processor  830  may encode audio data (e.g., the audio data  750  of  FIG. 7 ). Here, the encoder  837  may encode the audio data (e.g., the audio data  750  of  FIG. 7 ). Through this, the processor  830  may generate a single encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the encoded packet (e.g., the encoded packet  770 ) may be divided into a plurality of sections. Here, the server  800  may acquire audio related information for each section. 
     The processor  830  may control the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) in correspondence to each of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Through this, the processor  830  may convert the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) to a plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) respectively corresponding to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). For example, the transfer rate controller  839  may control a transfer rate of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) with respect to each electronic device (e.g., the electronic device  610  of  FIG. 6 ). The transfer rate controller  839  may control a transfer rate of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) based on a network state in connection with the electronic device (e.g., the electronic device  610  of  FIG. 6 ). Here, the processor  830  may control the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) based on the audio related information of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). 
     For example, if the electronic device (e.g., the electronic device  610  of  FIG. 6 ) is in a good network state relative to a reference network state, the processor  830  may maintain the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the converted packet (e.g., the packet  781  of  FIG. 7 ) may be identical to the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). On the contrary, if the electronic device (e.g., the electronic device  610  of  FIG. 6 ) is in a poor network state relative to a reference network state, the processor  830  may remove at least a portion of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) based on the audio related information of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the converted packets (e.g., the packets  783  and  785  of  FIG. 7 ) may differ from the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the processor  830  may discard at least one of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) or may discard the entire encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). 
     The processor  830  may transmit packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively, through the communication module  810 . 
     The server  800  according to an example embodiment may be connected to the plurality of electronic devices (e.g., the electronic device  510  of  FIG. 5 ), and includes the communication module  810  configured to communicate with the electronic devices  610  of  FIG. 6 , and the processor  830  configured to support a conference call between the electronic devices (e.g., the electronic device  510  of  FIG. 5 , the electronic devices  610  of  FIG. 6 ) through the communication module  810 . 
     According to an example embodiment, the processor  830  may be configured to receive a packet from each electronic device (e.g., the electronic device  510  of  FIG. 5 ) through the communication module  810 , to detect audio related information from a header of the packet, to determine whether to decode a payload of the packet based on the audio related information, and to detect an audio signal by decoding the payload. 
     According to an example embodiment, the processor  830  may be configured to detect a ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the audio related information and to determine whether to decode the payload by comparing the ranking to a desired (or alternatively, preset) threshold ranking. 
     According to an example embodiment, the audio related information may include at least one of audio activity information and energy level information. 
     According to an example embodiment, the processor  830  may be configured to mix an audio signal. 
     According to an example embodiment, the processor  830  may determine to decode the payload if the ranking is greater than or equal to the threshold ranking, and may determine to ignore the payload if the ranking is less than the threshold ranking. 
     According to an example embodiment, the processor  830  may be configured to generate a packet (e.g., the packet  770  of  FIG. 7 ) by encoding audio data (e.g., the audio data  750  of  FIG. 7 ), to convert the generated packet (e.g., the packet  770  of  FIG. 7 ) to a plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) respectively corresponding to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) based on network states in connection with the respective electronic devices (e.g., the electronic device  610  of  FIG. 6 ), and to transmit the converted packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively, through the communication module  810 . 
     According to an example embodiment, the processor  830  may be configured to maintain the generated packet (e.g., the packet  770  of  FIG. 7 ) if one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) is in a good network state and to remove at least a portion of the generated packet (e.g., the packet  770  of  FIG. 7 ) if one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) is in a poor network state. 
     According to an example embodiment, the processor  830  may be configured to convert the generated packet (e.g., the packet  770  of  FIG. 7 ) to the plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) based on audio related information about the generated packet (e.g., the packet  770  of  FIG. 7 ). 
     According to an example embodiment, the generated packet (e.g., the packet  770  of  FIG. 7 ) may be divided into a plurality of sections and each of the section may include the audio related information. 
     According to an example embodiment, the processor  830  may be configured to maintain the generated packet (e.g., the packet  770  of  FIG. 7 ), to discard at least one of the sections from the generated packet (e.g., the packet  770  of  FIG. 7 ), or to discard the generated packet (e.g., the packet  770  of  FIG. 7 ). 
     According to an example embodiment, the audio related information may include at least one of audio activity information and energy level information. 
     According to an example embodiment, the audio related information may be verified from packets received from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively. 
     According to an example embodiment, the audio related information may be detected from the audio data (e.g., the audio data  750  of  FIG. 7 ). 
     According to an embodiment, the processor  830  may be configured to generate audio data (e.g., the audio data  750  of  FIG. 7 ) by decoding encoded data received from another server. 
     According to another example embodiment, the processor  830  may be configured to receive packets from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively, through the communication module  810 , to detect at least one audio signal by decoding encoded data from at least one of the received packets, and to generate the audio data (e.g., the audio data  750  of  FIG. 7 ) from the detected audio signal. 
       FIG. 9  is a flowchart illustrating an example of an operating method of the server  800  (e.g., the server  520  of  FIG. 5 ) according to example an example embodiment. 
     Referring to  FIG. 9 , in operation  910 , the server  800  may connect to a plurality of electronic devices (e.g., the electronic device  510  of  FIG. 5 ) in a conference call environment. To support a conference call between the electronic devices (e.g., the electronic device  510  of  FIG. 5 ), the server  800  may connect to each electronic device (e.g., the electronic device  510  of  FIG. 5 ) through the communication module  810 ). Through this, the server  800  may connect the electronic devices (e.g., the electronic device  510  of  FIG. 5 ). 
     In operation  920 , the server  800  may receive a packet from each electronic device (e.g., the electronic device  510  of  FIG. 5 ). The processor  830  may receive a packet from each electronic device (e.g., the electronic device  510  of  FIG. 5 ) through the communication module  810 . 
     In operation  930 , the server  800  may verify audio related information by parsing a header of the packet. The processor  830  may verify audio related information by parsing a header of each packet. Here, the audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the collected signal into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an average energy level of collected signals or an energy level for each section. 
     In operation  940 , the server  800  may detect a ranking of each electronic device (e.g., the electronic device  510  of  FIG. 5 ). The processor  830  may detect a ranking of each electronic device (e.g., the electronic device  510  of  FIG. 5 ) among the electronic devices (e.g., the electronic device  510  of  FIG. 5 ). For example, the ranking detector  831  may detect the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the audio related information. Here, the ranking detector  831  may assign a score to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the audio related information and may detect a ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) based on the score. For example, the ranking detector  831  may detect the ranking of the corresponding electronic device as being relatively high according to an increase in the score and may detect the ranking of the corresponding electronic device as being relatively low according to a decrease in the score. 
     For example, if the audio activity information represents one of voice (voiced or unvoiced), silent, music, and noise, the ranking detector  831  may assign one of +1, 0, and −1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score based on the audio activity information. As another example, if the energy level information exceeds a desired (or alternatively, preset) threshold, for example, −30 dBfs, the ranking detector  831  may assign +2 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score. If the energy level information is less than or equal to the threshold, for example, −30 dBfs, the processor  830  may assign +1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score. As another example, if the audio activity information represents voice or music, the ranking detector  831  may assign +2 or +1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score depending on whether the energy level information exceeds the threshold. If the audio activity information represents silent or noise, the ranking detector  831  may assign 0 or −1 to the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a score. 
     In operation  950 , the server  800  may determine whether the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is greater than or equal to a desired (or alternatively, preset) threshold ranking. For example, the processor  830  may compare the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) to the threshold ranking. Here, if the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is determined to be greater than or equal to the threshold ranking, the processor  830  may register the electronic device (e.g., the electronic device  510  of  FIG. 5 ) as a new ranker. On the contrary, if the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is determined to be less than the threshold ranking, the processor  830  may exclude the electronic device (e.g., the electronic device  510  of  FIG. 5 ) from a ranker. 
     If the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is determined to be greater than or equal to the desired (or alternatively, preset) threshold ranking in operation  950 , the server  800  may detect an audio signal by decoding a payload of the corresponding packet in operation  960 . If the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is determined to be greater than or equal to the desired (or alternatively, preset) threshold ranking, the processor  830  may determine that the payload of the packet is to be decoded. That is, the processor  830  may determine that the encoded signal of the payload is generated from the audio signal that includes at least one of voice and music. Therefore, the processor  830  may decode the payload. Here, the decoder  833  may decode the payload. Through this, the processor  830  may detect, from the payload, the audio signal that includes at least one of voice and music. According to an example embodiment, the processor  830  may acquire voice uttered from the user of the electronic device (e.g., the electronic device  510  of  FIG. 5 ). According to another example embodiment, the processor  830  may acquire voice synthesized by the electronic device (e.g., the electronic device  510  of  FIG. 5 ). According to another example embodiment, the processor  830  may acquire an audio file from the electronic device (e.g., the electronic device  510  of  FIG. 5 ). 
     In operation  970 , the server  800  may mix the audio signal. The processor  830  may mix the audio signal. Here, the mixer  835  may mix the audio signal with an audio signal of at least one another electronic device (e.g., the electronic device  510  of  FIG. 5 ). 
     If the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is determined to be less than the threshold ranking in operation  950 , the server  800  may ignore the payload of the corresponding packet without decoding the same. If the ranking of the electronic device (e.g., the electronic device  510  of  FIG. 5 ) is determined to be less than the threshold ranking, the processor  830  may determine that the payload of the packet does not need to be decoded. That is, the processor  830  may determine that the encoded signal of the payload is not generated from the audio signal that includes voice. 
     The operating method of the server  800  according to an example embodiment relates to supporting a conference call between the plurality of electronic devices (e.g., the electronic device  510  of  FIG. 5 ) and may include receiving a packet from each electronic device (e.g., the electronic device  510  of  FIG. 5 ), detecting audio related information from a header of the packet, determining whether to decode a payload of the packet based on the audio related information, and detecting an audio signal by decoding the payload. 
     According to an example embodiment, the determining whether to decode the payload may include detecting a ranking of the electronic device based on the audio related information and determining whether to decode the payload by comparing the ranking to a desired (or alternatively, preset) threshold ranking. 
     According to an example embodiment, the audio related information may include at least one of audio activity information and energy level information. 
     According to an example embodiment, the operating method of the server  800  may further include mixing the audio signal. 
     According to an example embodiment, the determining whether to decode the payload may include determining to decode the payload if the ranking is greater than or equal to the threshold ranking, and determining to ignore the payload if the ranking is less than the threshold ranking. 
       FIG. 10  is a flowchart illustrating an example of an operating method of the server  800  (e.g., the server  620  of  FIG. 6 ) according to an example embodiment. 
     Referring to  FIG. 10 , in operation  1010 , the server  800  may connect to a plurality of electronic devices (e.g., the electronic device  610  of  FIG. 6 ) in a conference call environment. To support the conference call between the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), the server  800  may connect to each of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) through the communication module  810 . Through this, the server  800  may interconnect the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). 
     In operation  1020 , the server  800  may verify network states in connection with the respective electronic devices (e.g., the electronic device  610  of  FIG. 6 ). During connection to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), the processor  830  may verify the network states of the respective electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Here, the processor  830  may verify the network states based on signals received from the electronic devices (e.g., the electronic device  610  of  FIG. 6 , respectively, through the communication module  810 . 
     According to an example embodiment, the processor  830  may receive performance information representing communication performance of each of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) through the communication module  810 . Through this, the processor  830  may verify the network states based on the performance information. 
     According to another example embodiment, the processor  830  may periodically transmit reference signals to the electronic devices (e.g., the electronic device  610  of  FIG. 6 , respectively, through the communication module  810  and, in response thereto, may receive response signals from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively. Through this, the processor  830  may verify the network states based on the response signals. For example, the processor  830  may verify a network state of each electronic device (e.g., the electronic device  610  of  FIG. 6 ) based on received signal strength of each response signal. 
     According to another example embodiment, the processor  830  may receive packets from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively, through the communication module  810 . For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect an ambient signal to acquire voice uttered from the user. As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from voice synthesized based on a text generated by the user or a text pre-stored in the corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from at least one of a pre-stored audio file and an audio file received from an external apparatus (not shown). The electronic device (e.g., the electronic device  610  of  FIG. 6 ) may generate a packet by encoding the collected signal and may transmit the packet to the server  800 . Through this, the processor  830  may verify network states based on packets. For example, the processor  830  may verify a network state of each electronic device (e.g., the electronic device  610  of  FIG. 6 ) based on received signal strength of each packet. 
     In operation  1030 , the server  800  may generate audio data (e.g., the audio data  750  of  FIG. 7 ). For sharing with at least one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), the processor  830  may generate the audio data (e.g., the audio data  750  of  FIG. 7 ). Here, the processor  830  may verify audio related information with respect to the audio data (e.g., the audio data  750  of  FIG. 7 ). The audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the audio data (e.g., the audio data  750  of  FIG. 7 ) into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an energy level of the audio data (e.g., the audio data  750  of  FIG. 7 ). 
     According to an example embodiment, the processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ) based on data received from another server (not shown). For example, the processor  830  may receive encoded data from the other server. For example, the other server may receive packets from the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect an ambient signal to acquire voice uttered from the user. As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from voice synthesized based on a text generated by the user or a text pre-stored in the corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from at least one of a pre-stored audio file and an audio file received from an external apparatus (not shown). The electronic device (e.g., the electronic device  610  of  FIG. 6 ) may generate a packet by encoding the collected signal and may transmit the packet to the other server. In response thereto, the other server may decode the received packet and may recover the signal collected by the electronic device (e.g., the electronic device  610  of  FIG. 6 ). In this manner, the other server may generate encoded data based on signals collected by the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Through this, the other server may transmit the encoded data to the server (e.g., the electronic device  610  of  FIG. 6 ). The processor  830  may decode the encoded data. Here, the decoder  833  may decode the encoded data. Through this, the processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ). 
     According to another example embodiment, the processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ) based on at least one packet received from at least one of electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Description related thereto may be further made with reference to  FIG. 11 . 
       FIG. 11  is a flowchart illustrating an example of an operation of generating audio data (e.g., the audio data  750  of  FIG. 7 ) according to an example embodiment. 
     Referring to  FIG. 11 , in operation  1110 , the server  800  may verify packets received from electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect an ambient signal to acquire voice uttered from the user. As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from voice synthesized based on a text generated by the user or a text pre-stored in the corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). As another example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may collect a signal from at least one of a pre-stored audio signal and an audio file received from an external apparatus (not shown). The electronic device (e.g., the electronic device  610  of  FIG. 6 ) may generate a packet by encoding the collected signal and may transmit the packet to the server  800 . Through this, each of packets of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) may be received by the server  800 . The processor  830  may verify the packets received from the respective electronic devices (e.g., the electronic device  610  of  FIG. 6 ). 
     In operation  1120 , the server  800  may decode encoded data of at least one of packets. The processor  830  may recover a signal collected by at least one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) from at least one of the packets. For example, the decoder  833  may decode at least one of the packets. 
     According to an example embodiment, the processor  830  may verify audio related information from the packets before decoding at least one encoded data of the packets. Here, the audio related information may be detected by the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) and may be inserted into the respective corresponding headers of the packets. For example, each electronic device (e.g., the electronic device  610  of  FIG. 6 ) may detect the audio related information by analyzing the collected signal. Here, the processor  830  may select at least one of the packets based on the audio related information and may decode only the selected packet instead of unconditionally decoding all of the packets. 
     According to another example embodiment, the processor  830  may decode encoded data of each of all of the packets and may detect audio related information from each of signals collected by the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). The processor  830  may analyze each of the collected signals and may detect the audio related information from each of the collected signals. 
     In operation  1130 , the server  800  may generate audio data (e.g., the audio data  750  of  FIG. 7 ). The processor  830  may generate audio data (e.g., the audio data  750  of  FIG. 7 ) using a signal collected by each of at least one electronic device (e.g., the electronic device  610  of  FIG. 6 ). For example, the mixer  835  may mix signals collected by at least two electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Here, in response to the collected signal, audio related information of audio data (e.g., the audio data  750  of  FIG. 7 ) may be determined. For example, if a plurality of collected signals is mixed, audio related information of each of the collected signals may be summed. The server  800  may return to  FIG. 10 . 
     Referring again to  FIG. 10 , in operation  1040 , the server  800  may encode the audio data (e.g., the audio data  750  of  FIG. 7 ). Through this, the server  800  may generate a single encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). The processor  830  may encode the audio data (e.g., the audio data  750  of  FIG. 7 ). Here, the encoder  837  may encode the audio data (e.g., the audio data  750  of  FIG. 7 ). Through this, the processor  830  may generate a single encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) may be divided into a plurality of sections. Here, the server  800  may acquire audio related information for each of the sections. 
     In operation  1050 , the server  800  may control the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) in correspondence to each of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Through this, the server  800  may convert the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) to a plurality of packets e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) respectively corresponding to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). The processor  830  may control the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) in correspondence to each of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). Through this, the processor  830  may convert the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) to the plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) respectively corresponding to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ). For example, the transfer rate controller  839  may control a transfer rate of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) with respect to each electronic device (e.g., the electronic device  610  of  FIG. 6 ). The transfer rate controller  839  may control a transfer rate of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) based on a network state of each corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). Here, the processor  830  may control the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) based on audio related information of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). 
     For example, if the electronic device (e.g., the electronic device  610  of  FIG. 6 ) is in a good network state, the processor  830  may maintain the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the converted packet (e.g., the packet  781  of  FIG. 7 ) may be identical to the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). On the contrary, if the electronic device (e.g., the electronic device  610  of  FIG. 6 ) is in a poor network state, the processor  830  may remove at least a portion of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) based on audio related information of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). The converted packets (e.g., the packets  783  and  785  of  FIG. 7 ) may differ from the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the processor  830  may discard at least one of sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) or may discard the entire encoded packet (e.g., the encoded packet  770  of  FIG. 7 ), which is further described with reference to  FIG. 12 . The server  800  may control the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) in correspondence to each electronic device (e.g., the electronic device  610  of  FIG. 6 ). 
       FIG. 12  is a flowchart illustrating an operation of controlling a packet (e.g., the encoded packet  770  of  FIG. 7 ) of  FIG. 10 . 
     Referring to  FIG. 12 , in operation  1210 , the server  800  may select a first section from an encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). The processor  830  may select the first section from the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) and may verify audio related information of the selected first section. 
     In operation  1220 , the server  800  may verify whether audio activity information of the selected section represents noise. In operation  1230 , the server  800  may determine whether energy level information of the selected section is less than a desired (or alternatively, preset) threshold level. For example, the processor  830  may verify the selected audio activity information. Here, if the audio activity information of the selected section is determined to represent noise in operation  1220 , the processor  830  may determine whether the energy level information of the selected section is less than a desired (or alternatively, preset) threshold level in operation  1230 . For example, the processor  830  may verify the energy level information of the selected section and may compare an energy level of the energy level information to the threshold level. Here, the threshold level may be determined to be different for each electronic device (e.g., the electronic device  610  of  FIG. 6 ). That is, the threshold level may be determined based on a network state in connection with each corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). For example, if the electronic device (e.g., the electronic device  610  of  FIG. 6 ) is in a good network state, the threshold level may be determined as a low value. 
     If the audio activity information of the selected section is determined to not represent noise in operation  1220 , or if the energy level information is determined to be greater than or equal to the threshold level in operation  1230 , the server  800  may maintain the selected section in operation  1240 . That is, the processor  830  may determine that the selected section needs to be transmitted. Through this, the processor  830  may maintain the selected section in the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). The server  800  may perform operation  1280 . 
     If the audio activity information of the selected section is determined to represent noise in operation  1220 , or if the energy level information is determined to be less than the threshold level in operation  1230 , the server  800  may increase a noise count in operation  1250 . Here, the processor  830  may increase the noise count by a desired (or alternatively, preset) unit value. For example, the processor  830  may increase the noise count by each 1. In operation  1260 , the server  800  may determine whether the noise count exceeds a desired (or alternatively, preset) threshold count. For example, the processor  830  may compare the noise count and a threshold count. Here, the threshold count may be differently determined for each electronic device (e.g., the electronic device  610  of  FIG. 6 ). That is, the threshold count may be determined based on a network state in connection with the electronic device (e.g., the electronic device  610  of  FIG. 6 ). For example, if the electronic device (e.g., the electronic device  610  of  FIG. 6 ) is in a good network state, the threshold level may be determined to have a relatively large value. 
     If the noise count is determined to exceed a threshold count in operation  1260 , the server  800  may discard the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) in operation  1265 . That is, the processor  830  may determine that there is no need to transmit the entire encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Therefore, the processor  830  may discard the entire encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). 
     On the contrary, if the noise count is determined to be less than or equal to the threshold count in operation  1260 , the server  800  may discard the selected section in operation  1270 . That is, the processor  830  may determine that there is no need to transmit the section selected in the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Through this, the processor  830  may discard the section selected in the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). The server  800  may perform operation  1280 . 
     In operation  1280 , the server  800  may determine whether a subsequent section of the selected section is present in the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the processor  830  may verify whether verification is performed with respect to all of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). Here, the processor  830  may determine whether at least one of audio activity information and energy level information is verified with respect to all of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). 
     If a subsequent section is determined to be present in operation  1280 , the server  800  may select the subsequent section in operation  1290 . The processor  830  may select the subsequent section in the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) and may verify audio related information of the selected section. The server  800  may return to operation  1220 . Through this, the server  800  may maintain all of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ), may discard at least one of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ), or may discard all of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) with respect to each electronic device (e.g., the electronic device  610  of  FIG. 6 ). 
     If the subsequent section is determined to be absent in operation  1280 , the server  800  may return to  FIG. 10 . Here, the processor  830  may determine that verification is performed with respect to all of the sections of the encoded packet (e.g., the encoded packet  770  of  FIG. 7 ). 
     Referring again to  FIG. 10 , in operation  1060 , the server  800  may transmit packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively. The processor  830  may transmit the packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) to the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), respectively, through the communication module  810 . Here, if the entire encoded packet (e.g., the encoded packet  770  of  FIG. 7 ) is discarded with respect to at least one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), the processor  830  may transmit each of the packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) to a remaining corresponding electronic device (e.g., the electronic device  610  of  FIG. 6 ). 
     The operating method of the server  800  according to an example embodiment relates to supporting a conference call between the plurality of electronic devices (e.g., the electronic device  610  of  FIG. 6 ) and may include generating a packet (e.g., the packet  770  of  FIG. 7 ) by encoding audio data (e.g., the audio data  750  of  FIG. 7 ), converting the generated packet (e.g., the packet  770  of  FIG. 7 ) to a plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) respectively corresponding to a plurality of electronic devices (e.g., the electronic device  610  of  FIG. 6 ) based on network states of the respective electronic devices (e.g., the electronic device  610  of  FIG. 6 ), and transmitting the converted packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) to the electronic device (e.g., the electronic device  610  of  FIG. 6 ), respectively. 
     According to an example embodiment, the converting to the plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) may include at least one of maintaining the generated packet (e.g., the packet  770  of  FIG. 7 ) if one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) is in a good network state and removing at least a portion of the generated packet (e.g., the packet  770  of  FIG. 7 ) if one of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ) is in a poor network state. 
     According to an example embodiment, the converting to the plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) may include converting the generated packet (e.g., the packet  770  of  FIG. 7 ) to the plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) based on audio related information about the generated packet (e.g., the packet  770  of  FIG. 7 ). 
     According to an example embodiment, the generated packet (e.g., the packet  770  of  FIG. 7 ) may be divided into the plurality of sections and the audio related information may represent each of the sections. 
     According to an example embodiment, the converting to the plurality of packets (e.g., the packets  781 ,  783 , and  785  of  FIG. 7 ) may include at least one of maintaining the generated packet (e.g., the packet  770  of  FIG. 7 ), discarding at least one of the sections from the generated packet (e.g., the packet  770  of  FIG. 7 ), and discarding the generated packet (e.g., the packet  770  of  FIG. 7 ). 
     According to an example embodiment, the audio related information may include at least one of audio activity information and energy level information. 
     According to an example embodiment, the audio related information may be verified from packets received from the electronic devices, respectively. 
     According to an example embodiment, the audio related information may be verified from the audio data (e.g., the audio data  750  of  FIG. 7 ). 
     According to an example embodiment, the operating method of the server  800  may further include generating audio data (e.g., the audio data  750  of  FIG. 7 ) by decoding encoded data received from another server. 
     According to another example embodiment, the operating method of the server  800  may further include receiving a packet from each of the electronic devices (e.g., the electronic device  610  of  FIG. 6 ), detecting at least one audio signal by decoding encoded data of at least one packet among the received packets, and generating audio data (e.g., the audio data  750  of  FIG. 7 ) from the detected audio signal. 
       FIG. 13  is a diagram illustrating an electronic device  1300  (e.g., the electronic device  110  of  FIG. 1 , the electronic device  510  of  FIG. 5 , and the electronic device  610  of  FIG. 6 ) according to an example embodiment. 
     Referring to  FIG. 13 , the electronic device  1300  according to an example embodiment may include at least one of a communication module  1310 , a camera module  1320 , an input module  1330 , an output module  1340 , a display module  1350 , a memory  1360 , and a processor  1370 . Depending on some example embodiments, at least one of the components of the electronic device  1300  may be omitted or at least one another component may be added thereto. 
     The communication module  1310  may communicate with an external apparatus (not shown) in the electronic device  1300 . The communication module  1310  may establish a communication channel between the electronic device  1300  and the external apparatus and may communicate with the external apparatus through the communication channel. The communication module  1310  may include at least one of a wired communication module and a wireless communication module. For example, the wireless communication module may communicate with the external apparatus through at least one of a far-field communication network and a near-field communication network. 
     The camera module  1320  may capture an image. For example, the camera module  1320  may be a camera including at least one of a lens, an image sensor, an image signal processor, and a flash. 
     The input module  1330  may input an instruction to be used for at least one component of the electronic device  1300 . The input module  1330  may include at least one of an input device configured for the user to directly input an instruction or a signal to the electronic device  1300  and a sensor device configured to detect an ambient environment and to generate a signal. For example, the input device may include at least one of a microphone, a mouse, and a keyboard. Depending on some example embodiments, the sensor device may include at least one of a touch circuitry configured to detect a touch and a sensor circuitry configured to measure strength of force occurring due to the touch. 
     The output module  1340  may output an audio signal to an outside of the electronic device  1300 . For example, the output module  1340  may include at least one of a speaker and a receiver. The speaker and the receiver may be classifiably used for their respective purpose and may be selectively used regardless of the purpose. 
     The display module  1350  may visually provide information to an outside of the electronic device  1300 . For example, the display module  1350  may include at least one of a display, a hologram device, and a projector. Depending on some example embodiments, the display module  1350  may be configured as a touchscreen through assembly to at least one of the touch circuitry of the input module  1330  and the sensor circuitry configured to measure strength of force occurring due to the touch. 
     The memory  1360  may store a variety of data used by at least one component of the electronic device  1300 . For example, the memory  1360  may include at least one of a volatile memory and a non-volatile memory. Data may include input data or output data about a program or an instruction related thereto. The program may be stored in the memory  1360  as software and may include at least one of an OS, middleware, and an application. The program may include an application for supporting a conference call. 
     The processor  1370  may control at least one component of the electronic device  1300  and may perform data processing and operation by executing the program of the memory  1360 . The processor  1370  may execute the application. The application may include an application to perform a conference call. Here, during execution of the application, the processor  1370  may perform a conference call with at least one another electronic device  1300  through the server  800  (e.g., the server  120  of  FIG. 1 , the server  520  of  FIG. 5 , and the server  620  of  FIG. 6 ). To this end, the processor  1370  may connect to the server  800  through the communication module  1310 . For example, the processor  1370  may include at least one of an audio related detector  1371 , an encoder  1373 , and a decoder  1375 . The communication module  1310  may be included in the processor  1370 . The audio related detector  1371 , the encoder  1373 , and the decoder  1375 , as well as the communication module  1310  may be functional units of the processor  1370 . However, the processor  1370  is not intended to be limited to the disclosed functional units. In some example embodiments, additional functional units may be included in the processor  1370 . Further, the processor  1370  may perform the operations and/or functions of the various functional units without sub-dividing the operations and/or functions of the various functional units into these various functional units. The processor  1370  may include hardware including logic circuits or a hardware/software combination (e.g., processing circuitry). For example, the processing circuitry more specifically may include, but is not limited to, a central processing unit (CPU), an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a System-on-Chip (SoC), a programmable logic unit, a microprocessor, application-specific integrated circuit (ASIC), etc. 
     With performing a conference call, the processor  1370  may collect a signal. According to an example embodiment, the processor  1370  may collect a signal through a microphone of the input module  1330  to acquire voice uttered from the user. According to another example embodiment, the processor  1370  may synthesize voice based on a text generated by the user through the input module  1330  or a text pre-stored in the memory  1360  and may collect a signal from the synthesized voice. According to another example embodiment, the processor  1370  may collect a signal from at least one of an audio file pre-stored in the memory  1360  and an audio file received from the external apparatus through the communication module  1310 . The processor  1370  may detect audio related information from the collected signal. For example, the audio related detector  1371  may detect audio related information from the collected signal at an interval of a desired (or alternatively, preset) time length. Here, the audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the collected signal into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an average energy level of collected signals or an energy level for each section. For example, the audio related detector  1371  may include a voice activity detector (VAD). The processor  1370  may configure a header that includes the audio related information and a payload that includes an encoded signal. For example, the encoder  1373  may encode the collected signal to include the header and the payload. Through this, the processor  1370  may transmit a packet that includes the header and the payload to the server  320  through the communication module  1310 . 
     With performing a conference call, the processor  1370  may collect a signal. For example, to acquire voice uttered from the user, the processor  1370  may collect a signal through the microphone of the input module  1330 . As another example, the processor  1370  may synthesize voice based on a text generated by the user through the input module  1330  or a text pre-stored in the memory  1360  and may collect a signal from the synthesized voice. As another example, the processor  1370  may collect a signal from at least one of an audio file pre-stored in the memory  1360  and an audio file received from an external apparatus (not shown) through the communication module  1310 . Through this, the processor  1370  may generate a packet by encoding the collected signal and may transmit the packet to the server  800 . For example, the encoder  1373  may encode the collected signal. Through this, the processor  1370  may transmit the packet to the server  800  through the communication module  1310 . 
     According to an example embodiment, the processor  1370  may detect audio related information from the collected signal. For example, the audio related detector  1371  may detect audio related information from the collected signal at an interval of a desired (or alternatively, preset) time length. Here, the audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the collected signal into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an average energy level of collected signals or an energy level for each section. For example, the audio related detector  1371  may include a voice activity detector (VAD). The processor  1370  may configure a header that includes the audio related information and a payload that includes an encoded signal. For example, the encoder  1373  may encode the collected signal to include the header and the payload. Through this, the processor  1370  may transmit a packet that includes the header and the payload to the server  800  through the communication module  1310 . 
     With performing a conference call, the processor  1370  may receive the packet from the server  800  through the communication module  1310 . The processor  1370  may recover the audio signal from the packet by decoding the packet. For example, the decoder  1375  may decode the packet. Through this, the processor  1370  may output an audio signal through the output module  1340 . For example, the audio signal may be acquired at the server  800  from a single other electronic device  1300  that performs a conference call with the electronic device  1300 . As another example, the audio signal may be acquired by mixing audio signals acquired at the server  800  from at least two other electronic devices  1300  that perform a conference call with the electronic device  1300 . 
     The electronic device  1300  according to an example embodiment is to perform a conference call through the server  800  and may include the communication module  1310  and the processor  1370  configured to make a call with at least one another electronic device  1300  by communicating with the server  800  through the communication module  1310 . 
     According to an example embodiment, the processor  1370  may detect audio related information from a collected signal, and may generate a packet that includes a header including audio related information and a payload that includes an encoded signal, and may be configured to transmit the packet to the server  800  through the communication module  1310 . 
     According to an example embodiment, the audio related information may include at least one of audio activity information and energy level information. 
       FIG. 14  is a flowchart illustrating an example of an operating method of the electronic device  1300  according to an example embodiment. 
     Referring to  FIG. 14 , in operation  1410 , the electronic device  1300  may connect to the server  800  in a conference call environment. For a conference call, the processor  1370  may connect to the server  800  through the communication module  1310 . Here, the server  800  may connect to at least one another electronic device  1300 . Through this, the processor  1370  may connect to the other electronic device  1300  through the server  800 . 
     In operation  1420 , the electronic device  1300  may collect a signal. The processor  1370  may collect the signal through the input module  1330 . According to an example embodiment, to acquire voice uttered from the user, the processor  1370  may collect an ambient signal through the microphone of the input module  1330 . According to another example embodiment, the processor  1370  may synthesize voice based on a text generated by the user through the input module  1330  or a text pre-stored in the memory  1360 . According to another example embodiment, the processor  1370  may collect the signal from at least one of an audio file pre-stored in the memory  1360  and an audio file received from the external apparatus through the communication module  1310 . 
     In operation  1430 , the electronic device  1300  may detect audio related information from the collected signal. The processor  1370  may detect the audio related information from the collected signal. For example, the audio related detector  1371  may detect the audio related information from the collected signal at an interval of a desired (or alternatively, preset) time length. Here, the audio related information may include at least one of audio activity information and energy level information. The audio activity information may be used to classify the collected signal into at least one of voice (voiced or unvoiced), silent, music, and noise. The energy level information may represent an average energy level of collected signals or an energy level for each section. 
     In operation  1440 , the electronic device  1300  may configure a header that includes the audio related information and a payload that includes an encoded signal. The processor  1370  may configure the header that includes the audio related information and the payload that includes the encoded signal. For example, the encoder  1373  may encoded the collected signal to include the header and payload. 
     In operation  1450 , the electronic device  1300  may transmit, to the server  800 , a packet that includes the header and the payload. The processor  1370  may transmit the packet to the server  800  through the communication module  1310 . 
     The electronic device  1300  may receive the packet from the server  800 . The processor  1370  may receive the packet from the server  800  through the communication module  1310 . The processor  1370  may recover the audio signal from the packet by decoding the packet. For example, the decoder  1375  may decode the packet. Through this, the electronic device  1300  may output an audio signal acquired from at least one another electronic device  1300 . The processor  1370  may output the audio signal through the output module  1340 . For example, the audio signal may be acquired from a single other electronic device  1300 . As another example, the audio signal may be acquired by mixing audio signals acquired from at least two other electronic devices  1300 . 
     The operating method of the electronic device  1300  according to an example embodiment is to perform a conference call through the server  800  and may include detecting audio related information from a collected signal, generating a packet including a header that includes the audio related information and a payload that includes an encoded signal, and transmitting the packet to the server  800 . 
     According to an example embodiment, the audio related information may include at least one of audio activity information and energy level information. 
     According to an example embodiment, although the server  800  does not decode all of packets received from a plurality of electronic devices  1300 , it is possible to support a conference call between the electronic devices  1300 . That is, to detect an audio signal from at least one of the electronic devices  1300 , the server  800  decodes at least one of the packets received from the electronic devices  1300 . That is, the server  800  does not need to decode all of the packets received from the electronic devices  1300  because the server  800  may determine whether the audio signal is detectable from the payload by simply parsing a header of each packet. Accordingly, load on the server  800  may decrease in a conference call environment. 
     According to an example embodiment, a number of times the server  800  performs encoding may decrease. That is, by simply performing encoding once, the server  800  may generate packets for the respective electronic devices  1300 . Therefore, the server  800  does not need to encode audio data a number of times corresponding to the number of electronic devices  1300 . Through this, load on the server  800  may decrease. 
     The disclosed example embodiments and the terms used herein are not construed to limit the technique described herein to specific example embodiments and may be understood to include various modifications, equivalents, and/or substitutions. Like reference numerals refer to like elements throughout. As used herein, the singular forms “a,” “an,” and “the,” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Herein, the expressions, “A or B,” “at least one of A and/or B,” “A, B, or C,” “at least one of A, B, and/or C,” and the like may include any possible combinations of listed items. Terms “first,” “second,” etc., are used to describe various components and the components should not be limited by the terms. The terms are simply used to distinguish one component from another component. When a component (e.g., a first component) is described to be “(functionally or communicatively) connected to” or “accessed to” another component (e.g., a second component), the component may be directly connected to the other component or may be connected through still another component (e.g., a third component). 
     The term “module” used herein may include a unit configured as hardware, or a combination of hardware and software (e.g., firmware), and may be interchangeably used with, for example, the terms “logic,” “logic block,” “part,” “circuit,” etc. The module may be an integrally configured part, a minimum unit that performs at least one function, or a portion thereof. For example, the module may be configured as an application-specific integrated circuit (ASIC). 
     Some example embodiment may be implemented as a non-transitory computer-readable recording medium (e.g., the memory  820  of  FIG. 8 , the memory  1360  of  FIG. 13 ) storing software that includes at least one instruction and, when executed by a processor included in a machine (e.g., the electronic device  110  of  FIG. 1 , the server  120  of  FIG. 1 , the server  800  of  FIG. 8 , and the electronic device  1300  of  FIG. 13 ), causes the machine to implement an operating method for supporting a conference call. For example, a processor (e.g., the processor  830  of  FIG. 8  and the processor  1370  of  FIG. 13 ) of the machine may call at least one instruction from among the stored one or more instructions from the storage medium and may execute the called at least one instruction, which enables the machine to operate to perform at least one function according to the called at least one instruction. The at least one instruction may include a code generated by a compiler or a code executable by an interpreter. The machine-readable storage medium may be provided in a form of a non-transitory record medium. Here, “non-transitory” simply indicates that the record medium is a tangible device and does not include a signal (e.g., electromagnetic wave). This term does not distinguish a case in which data is semi-permanently stored and a case in which the data is temporarily stored in the record medium. 
     According to some example embodiments, each component (e.g., module or program) of the aforementioned components may include a singular entity or a plurality of entities. According to some example embodiments, at least one component among the aforementioned components or operations may be omitted, or at least one another component or operation may be added. Alternately or additionally, the plurality of components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform the same or similar functionality as being performed by a corresponding component among a plurality of components before integrating at least one function of each component of the plurality of components. According to the disclosed example embodiments, operations performed by a module, a program, or another component may be performed in parallel, repeatedly, or heuristically, or at least one of the operations may be performed in different order or omitted. Alternatively, at least one another operation may be added. 
     While this disclosure includes specific example embodiments, it will be apparent to one of ordinary skill in the art that various alterations and modifications in form and details may be made in these example embodiments without departing from the spirit and scope of the claims and their equivalents. For example, suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents.