KR100378657B1 - A Method of Internet Phone Telecommunication by Voice-file Sending and Receiving - Google Patents

Abstract

The present invention is to transmit and receive a voice file to maintain the basic call by storing and transmitting the phone voice as a file when the data quality of the Internet is low while the call quality is poor while making a phone call over the Internet It relates to an internet telephone call method.

According to the present invention, an internet phone call method using a voice file transmission / reception method is an internet phone call method in which a real-time phone call is made through a full duplex method via the Internet. When the communication line is established between the callers and the real-time Internet phone call is made via the Internet through the real-time call unit 270, the call quality monitoring unit 250 monitors the transmission rate of voice data transmitted and received through the Internet. Alternatively, according to the caller's setting determined by the caller, the call mode switching unit 260 converts the call mode from the real-time call mode to the file transfer call mode; The file transmission call unit 280 generates a file by storing the voice of the caller whose call mode is switched, and transmits the generated file to the other caller and outputs the voice file by transmitting the call file. It is characterized in that the phone call is made, including; voice file transmission call process to make a continuous phone call by.

Description

A method of Internet Phone Telecommunication by Voice-file Sending and Receiving}

The present invention relates to an internet telephony method, and in particular, during a telephone call over the internet, when the data transmission rate of the internet becomes low and the call quality deteriorates, the telephone call is stored as a file, and then the basic call continues. The present invention relates to an internet telephony call method for transmitting and receiving voice files.

In recent years, an internet phone that can make a phone call at a low price using the Internet has been developed and utilized. Internet telephones include a computer with a voice input / output device and a PC (Personal Computer) -to-PC method in which a computer makes a telephone call through the Internet, a PC-to-Phone method in which a telephone call is made through a computer and a general telephone. It is used as a phone-to-phone method through a telephone, and Internet telephones can lower call costs than telephones using a public switched telephone network (PSTN), compared to a public telephone network using a line transmission scheme. This is because the public Internet uses the method. The packet transmission method used in the public Internet does not use a specific line exclusively like the circuit transmission method. Instead, the data to be transmitted is divided into several packets and placed on the transmission line so that the packets reach the destination through the fastest path. As a method, a transmission line is mixed with packets sent by multiple users, and thus, multiple users can share a circuit at the same time, thereby providing a service at a lower price than a circuit transmission method having a monopoly.

However, the Internet phone using the packet transmission method has a problem in that a lot of data packets move through a single line, and thus, if there is a lot of traffic, there is a problem of transmission delay and loss, which degrades the call quality. . Due to this, there are many cases in which the call quality deteriorates during the phone call, so that the voice of the other party cannot be properly confirmed. When the contents of the phone call are important, the call quality of the Internet phone may be fatal in communication with each other.

Accordingly, the present invention has been made to solve the above problems, and the object of the present invention is to continue the doctor even when the phone call with the other party is poor because the call quality is poor while making a phone call via the Internet. It is to provide an internet telephony method that enables delivery.

In order to achieve the above object, the Internet telephony call method according to the present invention transmits / receives a voice file in the Internet telephony call method in which a real-time telephony call is made through a full duplex method through the Internet. When a communication line is established between callers and a real-time Internet telephone call is made through the Internet through a real-time call unit, the caller may be alerted by a call quality monitoring unit that monitors the transmission rate of voice data transmitted and received through the Internet or by the caller's judgment. A call mode switching process of switching a phone call mode from a real time call mode to a file transfer call mode according to a setting; According to the call mode switching of the call mode switching process, the file transmission call unit generates a file by storing the voice of the caller whose call mode is switched, and transmits the generated file to the other caller and outputs the call continuously. The phone call is made, including a voice file transmission call process for making a call. In the call mode switching process, the call quality monitoring unit of the Internet phone server detects the voice data rate according to the phone call and sets the voice data rate. If it is lower than the transmission rate, it is determined that the call quality is poor, and if it recovers the standard transmission rate, it is determined that the call quality is good and outputs the determined call quality state through at least one means of picture, sound, and text. In addition, communication between PCs in the call mode switching process. In the case of a telephone call and a call duration, the call mode switching unit switches the call mode of the caller by the setting of one caller judged that the quality of the voice call is poor. It is preferable that the call mode switching unit switches both call modes by the setting. In addition, when the voice data transmission rate is restored and the call quality improves during the storage call through the voice file during the voice file transmission call, the call quality is improved. The mode switching unit preferably switches from the voice file call mode to the real time call mode through the call mode change.

1 is a block diagram of an Internet telephony call system according to an embodiment of the present invention;

2 is a block diagram of the Internet phone server of the Internet phone call system according to an embodiment of the present invention;

3 is a flowchart illustrating a process of switching to an internet phone call method by transmitting and receiving a voice file according to poor call quality during a real-time internet phone call according to an embodiment of the present invention;

Figure 4a is a flow chart illustrating a process when the communication quality between the client in the real-time call mode is established by the communication line between the client through the Internet phone server in the PC-to-PC method according to an embodiment of the present invention ,

Figure 4b is a process when a communication line between the client and the phone is set through the Internet phone server in the PC-to-Phone method according to an embodiment of the present invention when the call quality in the real-time call mode is abnormal It is a flow chart showing.

* Explanation of symbols for main parts of the drawings

100: client 200: Internet phone server

210: Internet connection 220: PSTN connection

230: Internet / PSTN interworking unit 240: call setting unit

250: call quality monitoring unit 260: call mode switching unit

270: real-time call unit 280: file transfer call unit

290: central processing unit 300: Internet

400: PSTN (Public Telephone Network) 500: Telephone

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an embodiment of an internet telephony method and a system by voice file transmission and reception according to the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration diagram of an internet telephony telephony system having a telephone call function by transmitting and receiving a voice file according to an exemplary embodiment of the present invention, and FIG. 2 is a schematic diagram of an internet telephony server according to an exemplary embodiment of the present invention.

In the present invention, if the call quality is poor while communicating with the other party while using the Internet phone, the voice is recorded by recording the voice to be delivered and generating a voice file, and transmitting the generated voice file. In order to confirm this, it is implemented to enable continuous communication with each other. As shown in FIG. 1, an internet telephony system includes a plurality of clients 100 and a telephone 500 for performing a telephone call, and Internet phone server 200 for establishing and controlling a telephone call between the client 100 or between the client 100 and the general telephone 500.

The client 100 is composed of a voice input / output device for a telephone call, that is, a computer having a microphone and a speaker, and the other client 100 or the telephone 500 that wants to make a call by accessing the Internet telephone server 200. Request a phone call with The Internet phone server 200 controls a telephone call via the Internet 300 by establishing a communication line between the client 100 requesting the telephone call, the client 100 and the telephone 500. Since the telephone call between the client 100 and the ordinary telephone 500 is made through the Internet 300 and the PSTN 400, the Internet telephone server 300 is suitable for data transmission and PSTN transmission. It transfers data format interchangeably.

As shown in FIG. 2, the Internet phone server 200 includes an Internet connection 210 connected to the Internet 300, a PSTN connection 220 connected to a public telephone communication network, an Internet 300 and a PSTN ( Internet / PSTN interworking unit 230 for interworking 400, call setup unit 240 for establishing a communication line between client 101 and client 102 or client 101 and telephone 501, and the set Real-time call unit 270 for transmitting and controlling voice data to make a telephone call in real time through a communication line, and checking the transmission rate of voice data transmitted through the Internet, and when the data rate falls below a predetermined standard, the quality of telephone call The call quality monitoring unit 250 that warns the client 100 or the phone 500 of this poorness, and the call quality of the phone may be poor so that one party cannot recognize the voice of the other party. In this case, the caller of the other side records his / her voice to be delivered, generates a voice file, and transmits the voice file to one party caller. The one party caller checks the received voice file and continuously controls the phone call. The unit 280 selects one of the real-time call mode of the real-time call unit 270 and the file transfer call mode of the file transfer call unit 280 according to the warning of the call quality monitoring unit 250 or the request of the caller. And a call mode switching unit 260 capable of switching modes so as to make a call, and a central processing unit 290 for executing and controlling each unit of the Internet phone server 200.

The reference data transmission rate in the call quality monitoring unit 250 is set to a data transmission rate such that the voice of the calling party can be understood by the receiving caller. In an embodiment of the present invention, the transmission rate of data transmitted to the receiving end is approximately equal. Although 12 k bps (bits per second) is set, the reference data rate may vary depending on the status of the client 100 or the Internet 300 or other conditions of the transmission error rate. When the voice data rate is lower than the reference data rate, the call quality monitoring unit 250 indicates a poor quality of the call to the receiving party, and when the original reference data rate is restored again, the call quality is restored. The display method of the call quality may be implemented by various methods such as a picture, a sound, and a text.

The call mode switching unit 260 selects one of a real-time call mode and a file transmission call mode to make a phone call. The selection of the call mode is performed by the receiving caller in the call quality monitoring unit 250. According to the displayed call quality state and the call voice state felt by the other party, the caller of the other party is switched to the appropriate mode by changing the call mode, or the call quality monitoring unit 250 is directly connected to the sender according to the call quality state. You can request a conversion. That is, if the voice data transmission rate is lower than the reference data transmission rate and the call quality is poor, the call quality monitoring unit 250 displays the poor call quality and switches the call mode to the file transfer call mode so that the call is made. When the call quality is restored to the standard or higher again, the call may be requested to switch the call mode to the real time call mode so that the phone call can be made. Since the transmission rate of the voice data transmitted through the Internet may be different from the transmitting side and the receiving side, the communication mode is switched separately from the transmitting side and the receiving side.

The real-time call unit 270 performs a full duplex telephone call by transmitting and outputting the caller's voice in real time, while the file transfer call unit 280 is half-duplex transmitted and output in one direction at a time. (Half Duplex) In the telephony method, when transmitting voice data, the voice data is stored as a complete file and then transmitted.If the voice data is output, the received voice data is reassembled to the original file. The phone call is continuously made by printing after completion. This has a disadvantage in that the time is somewhat delayed than the real-time call of the real-time call unit 270, but even when the data rate is low, the voice can be output without interruption in the middle without noise.

The Internet / PSTN interworking unit 230 converts data transmitted in the form of packets between the client 100 and the Internet telephone server 200 into data in the form transmitted from the PSTN 400 or vice versa. It converts the data of the form into the data of the form used in the Internet 300 and transmits it so that the telephone call between the client 100 and the telephone 500 can be performed.

Internet telephone call method by transmitting and receiving voice files using the Internet telephony system consisting of the above configuration is the Internet during the real-time telephone call between the caller via the Internet 300 in step S10 as shown in FIG. Call quality determination process (S20) for judging the quality of the voice of the other party's caller through the computer 300 or the caller's time and hearing (S20), and real-time call mode or file transmission call mode according to the call quality determination result. Call mode switching process (S30) for switching between the mutual mode, the caller who switched the mode stores his voice to create a file and transmits it to the receiving side and the transmitted voice file is output to the receiving side, Internet phone call is in progress, including the voice file transmission call process (S40) where the call is continuously made by checking the voice.

In the call quality determination process (S20), if the call quality monitoring unit 250 of the Internet phone server 200 detects a transmission rate of voice data received at both sides according to a phone call and becomes lower than a preset reference transmission rate, call quality This fault is determined to warn the receiving party of a bad call through a picture, sound or text. For example, if the call quality monitoring unit 250 indicates that the call quality is poor, such as a graph, a histogram, or a digital coefficient, the caller visually recognizes that the call quality is poor. In addition, when the call quality monitoring unit 250 notifies that the call quality is poor, such as a specific sound or a guide broadcast, the caller recognizes that the current call quality is poor. It is also possible to determine whether or not defective by direct judgment. The caller may recognize that the call quality is deteriorated by hearing and determine that the call quality is poor when the caller performs a real-time Internet telephone call and the call quality becomes poor due to the low data rate of the Internet.

In the call mode switching process (S30), the caller of one side whose voice data transmission rate received in the call quality determination process (S20) is lower than the reference rate is transmitted to the caller of the other side through the call mode switching unit 260 in real time. Switch from voice call mode to voice file transfer mode and request voice data to be sent so that the other caller can switch his call mode.

In the voice file transmission call process (S40), the caller who has switched the call mode generates and transmits a voice file containing the contents to be transmitted through the file transmission caller 280, and the caller of the other party transmits the transmitted voice file. A telephone call is made through the voice output device. If the transmission rate of the voice data recovers more than the reference transmission rate during the telephone call through the voice file transmission call process (S40), the phone call is made again by switching the mode to the original real-time telephone call method.

Hereinafter, an embodiment of an internet telephony call process using an internet telephony system will be described in more detail with reference to the accompanying drawings.

FIG. 4A illustrates a process when a communication line between the client 100 is established through the Internet phone server 200 in the PC-to-PC phone call method and an abnormality occurs in the call quality in the real time call mode. Figure 4b is a flow chart, when the communication line between the client and the phone is set through the Internet phone server 200 in the PC-to-Phone phone call method in the real-time call mode when the abnormality in the call quality during the call A flow chart showing the process is described. Prior to the description, the clients 101 and 102 are all connected to the Internet 300, and the call mode change is performed by the receiving caller who does not recognize the call voice properly.

[PC-to-PC Phone Call]

As shown in FIG. 4A, first, client A 101 connects to the Internet telephone server 200 in step S110, and client B 102 wants to make a telephone call to the connected Internet telephone server 200 in step S120. Requests a telephone call connection with. The Internet phone server 200 having received the call connection request calls the client B 102 in step S130 to perform a call connection process between both the clients 101 and 102, thereby establishing a connection between the client A 101 and the client B 102. A communication line is established through the Internet 300. When the call connection is established, the call quality monitoring unit 250 operates in step S140 to check the data transmission rate of the set communication line. In step S150, both the client A 101 and the client B 102 call in the real time call mode. You make a call.

If there is no abnormality in the voice call, the client A 101 and the client B 102 continue the call and, after completion of each other's business, the call is terminated through the step S160 and the step S170.

In step S180, the call quality monitoring unit 250 provides call quality information to the client A 101 and the client B 102, and the caller of the client A 101 and the client B 102 calls in step S200. The quality status is directly judged to determine whether to change the call mode.

If the caller can hear the voice despite the poor call quality warning of the call quality monitor 250, the client A 101 and the client B 102 continue the phone call in the real-time call mode, and the caller If the contents of the call cannot be normally understood, the call mode is changed in step S210.

In step S210, the client A 101 is set to change the call mode, which is based on the data rate provided by the client A 101 from the call quality monitoring unit 250 through step S180. ) Or a call mode change request from the client B 102, which determines that the received call voice is bad in step S190.

When the client A 101 changes the call mode, in step S220, the client A 101 transmits the voice data in the file transfer mode, and the client B 102 transmits the voice data in the real time call mode to proceed with the stored call. .

When the stored call of the client A 101 ends in step S230, the call mode of the client A 101 is changed to the real-time call mode, and the process returns to the step S150 to repeat the subsequent process.

In step S190, if the caller of the client A 101 determines that the voice of the caller of the client B 102 cannot be understood because the voice is delayed and the noise is high, the client B 102 through the steps S200 and S210. Can change the call mode to perform a stored call.

Through the above process, a telephone call is made between the client A 101 and the client B 102. If the other party cannot recognize the voice properly due to a failure of real-time voice data transmission during the telephone call, the voice of one side caller is to be delivered. The storage call can be stored in a half-duplex manner in which the file is stored and transmitted. If the data transmission is satisfactory, the original real-time two-way telephone call can be made again in step S230.

[PC-to-Phone Phone Call]

As shown in FIG. 4B, first, the client 101 accesses the Internet telephone server 200 in step S310, and requests a telephone call connection with the telephone 501 that wants to make a telephone call in step S320. The Internet phone server 200, which has received a request for a telephone call connection, calls the phone 501 through the PSTN 400 in step S330 to perform a call connection process. The Internet phone server 200 is connected between the client 101 and the phone 501. The communication line is established through the Internet 300 and the PSTN 400 via the network. When the communication line is established between the client 101 and the telephone 501, the telephone call quality monitoring unit 250 operates in step S340 to check the data transmission rate on the Internet 300 during the set communication line, step S350. In the client 101 and the telephone 501 both make a telephone call in the real-time call mode. When the telephone call is to be ended in step S360, the call is terminated by ending the call connection established between the client 101 and the telephone 501 in step S370.

The processing for the poor call quality occurring during the telephone call made in steps S380 to S430 is performed except that the telephone 501 is connected to one side of the Internet telephone server 200 and not the client 102. Since the process is the same as that of to-PC, a detailed description thereof will be omitted. However, the control of the stored call method is established at the client 101, and when the stored call is set by the client 101, the phone 501 is also converted to the stored call, and accordingly, the caller presses a button designated by the caller. To record and transmit voice.

In the case of a phone-to-phone phone call method, since the Internet phone server 200 must be provided for each phone, at least two or more are required, and the poor phone call quality generated during the phone call is provided on both sides of the Internet phone server. Each side can be controlled by the telephone 501 using the 200, and the telephone 501 can make a stored call for recording and transmitting voice by pressing a designated button. In the case of the telephone call method, the telephone line 501 establishes a communication line through the Internet telephone server 200 and the PSTN 400, and then sets up a call connection with the client 101 through the Internet 300. The processing for poor call quality occurring during a telephone call is the same as the PC-to-Phone method except that the telephone 501 is connected to and controlled by the client 101 via the Internet telephone server 200. Detailed description thereof will be omitted.

In the above, a telephone call in which the client A 101 and the client B 102 are connected through the internet telephone server 200, and a telephone call made by the client 101 and the telephone 501 via the internet telephone server 200. In a call and an Internet telephone call of a telephone connected to one of the Internet telephone server 200 and a telephone connected to the other Internet telephone server 200, the voice data transmission rate is lowered so that the telephone voice is interrupted or the voice of the other party cannot be recognized properly. We have described the Internet phone that can accurately communicate between callers by recording the voice to be transmitted, creating a file, and transmitting and confirming the file.

The Internet phone server 200 constituting the Internet phone call system not only serves to control the Internet phone call by establishing a communication line between the client 101 (102) or the phone 500, but also a voice input / output device. It can also serve as a client by itself. That is, an internet phone call is possible between the clients 100 and the internet phone server 200, and an internet phone call by transmitting and receiving a voice file according to the present invention is also possible. In addition, the present invention can be implemented to enable accurate communication by a method of storing and transmitting the voice as a file when the call quality is poor even when a direct telephone call is made between the client 100 via the Internet (300) Do.

As described above, an Internet telephone having a telephone call function by transmitting / receiving a voice file according to the present invention is poor in call quality due to a decrease in data rate caused by data transmission characteristics of the Internet in all telephone calls made through the Internet. When the telephone call with the other party is not properly made, it is possible to continuously transmit accurate information by storing and transmitting the contents to be transmitted as a voice file.

Claims (5)

In the Internet telephony call method in which a real-time telephone call is made through a full duplex method through the Internet, When a communication line is established between callers by the call setup unit 240 of the Internet phone server 200 and a real-time Internet phone call is made via the Internet through the real-time call unit 270, the voice data transmitted and received through the Internet is stored. According to a warning of the call quality monitoring unit 250 that monitors the transmission rate or the setting of the caller based on the caller's judgment, the call mode switching unit 260 switches the call call mode from the real time call mode to the file transfer call mode. Process; The file transmission call unit 280 generates a file by storing the voice of the caller whose call mode is switched, and transmits the generated file to the other caller and outputs the voice file by transmitting the call file. The voice file transmission call process for continuous telephone call is made by the Internet telephone call method by transmitting and receiving a voice file, characterized in that a telephone call is made. The method of claim 1, wherein The call quality monitoring unit 250 of the Internet phone server 200 detects the voice data rate according to the telephone call and determines that the call quality is poor when the voice data rate is lower than the preset reference rate, and restores the reference rate. And determining the call quality is good and outputting the determined call quality state through at least one means of pictures, sounds and texts. delete The method of claim 1, wherein In the case of a PC-to-PC call and a call duration call, the call mode switching unit 260 switches the call mode of the caller by the setting of one caller judged that the quality of the transmitted voice quality is poor. In the case of a phone call with a PC, the call mode switching unit 260 switches both call modes by the setting of the PC side caller. The voice file transmission call of claim 1, wherein If the voice data transmission rate is restored during the storage call through the voice file and the call quality is good, the call mode switching unit 260 switches the voice file call mode from the voice file call mode to the real-time call mode by switching the call mode. Internet telephony call by sending and receiving files.