sound transmission system using UDP protocol for PC-to-Phone method

摘要

The present invention relates to a PC-to-phone remote voice call system using the UPD protocol, and more particularly, in a voice call system using the Internet and the PSTN 400 network, a server connected to the Internet by the call client 100 ( Requesting connection to the reception number of the called party 300 to the first step (S1); A second step (S2) of attempting to connect to the called party (300) by the received number requested by the server (200); A third step (S3) of receiving a connection request from the called party and sending a connection response signal to the server 200; A fourth step (S4) in which the server 200 sends a connection completion message to the call client 100 according to the transmitted response signal; A fifth step (S5) of preparing a buffer for recording and reproducing voice in real time and in both directions, wherein the call client 100 to which the completion message has been sent is received; A sixth step (S6) of storing the voice data input to the call client 100 in a buffer and transmitting the voice data to the server 200 using a UIP protocol; The seventh step S7 of transmitting the voice data of the calling client 100 transmitted to the server 200 to the voice compression board 500, and transmitting the voice data to the telephone receiver 300 through the PSTN 400 network. ; The voice of the called party 300 is transmitted to the voice compression board 500 of the server 200 through the PSTN 400 network, and the server 200 transmits the transmitted voice using a UIP protocol. An eighth step S8 of transmitting to 100; Receives the voice of the talker 300 transmitted from the server 200 in the voice playback buffer to play the voice, and reproduces a predetermined amount of the voice recording buffer received from the talk client 100 as real-time voice data, And a ninth step (S9) of preventing the accumulation of voice data in the buffer by deleting the contents of the buffer so as to be able to use the reproduced buffer next time and placing it at the end of the queue. The second step S2 includes transmitting a request impossible message from the server 200 to the talk client 100 when the connection attempt fails due to the PSTN 400 network, and the talk client 100. ) Or when transmitting the voice data recorded in 500Byte ~ 2000Byte unit over the network to transmit the voice from the server 200 in real time. It is attached to the sex data packet, and the server 200 side is compared to the PC to the far-end voice call system using the UDPI protocol, characterized in that to reproduce in real time. Accordingly, there is an advantage that the user can talk without sound collision even when using the sound of the computer game.