An electronic device comprising: a communication module configured to transmit or receive data by using a call channel established via a call connection to an external electronic device ; and a processor , wherein the processor is configured to: transmit, to the external electronic device , a call connection request message for establishment of the call channel between the external electronic device and the electronic device ; receive a response message from the external electronic device , the response message including capability information of the external electronic device related to the call connection; on the basis of the capability information of the external electronic device , determine whether to pre-process a content, which is transmitted via the call connection, by using a transmission filter that changes a quality of the content before being encoded for transmission to the external electronic device; transmit, to the external electronic device , a call connection confirmation message indicating whether to post-process the conten after decoding it ; and control the communication module to complete establishment of the call channel, wherein the call connection request message comprises capability information of the electronic device , which is related to the transmission filter . a communication module configured to transmit or receive data by using a call channel established via a call connection to an external electronic device ; and a processor , wherein the processor is configured to: transmit, to the external electronic device , a call connection request message for establishment of the call channel between the external electronic device and the electronic device ; receive a response message from the external electronic device , the response message including capability information of the external electronic device related to the call connection; on the basis of the capability information of the external electronic device , determine whether to pre-process a content, which is transmitted via the call connection, by using a transmission filter that changes a quality of the content before being encoded for transmission to the external electronic device; transmit, to the external electronic device , a call connection confirmation message indicating whether to post-process the conten after decoding it ; and control the communication module to complete establishment of the call channel, wherein the call connection request message comprises capability information of the electronic device , which is related to the transmission filter . transmit, to the external electronic device , a call connection request message for establishment of the call channel between the external electronic device and the electronic device ; receive a response message from the external electronic device , the response message including capability information of the external electronic device related to the call connection; on the basis of the capability information of the external electronic device , determine whether to pre-process a content, which is transmitted via the call connection, by using a transmission filter that changes a quality of the content before being encoded for transmission to the external electronic device; transmit, to the external electronic device , a call connection confirmation message indicating whether to post-process the conten after decoding it ; and control the communication module to complete establishment of the call channel, wherein the call connection request message comprises capability information of the electronic device , which is related to the transmission filter . <EOS>