KR20020019637A - method for automatic connection of picture phone. - Google Patents

method for automatic connection of picture phone. Download PDF

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Publication number
KR20020019637A
KR20020019637A KR1020000052588A KR20000052588A KR20020019637A KR 20020019637 A KR20020019637 A KR 20020019637A KR 1020000052588 A KR1020000052588 A KR 1020000052588A KR 20000052588 A KR20000052588 A KR 20000052588A KR 20020019637 A KR20020019637 A KR 20020019637A
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South Korea
Prior art keywords
video
communication
connection
training
mode
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KR1020000052588A
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Korean (ko)
Inventor
김문선
심신호
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구자홍
엘지전자주식회사
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Priority to KR1020000052588A priority Critical patent/KR20020019637A/en
Publication of KR20020019637A publication Critical patent/KR20020019637A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
    • H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
    • H04M1/72451—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to schedules, e.g. using calendar applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72466—User interfaces specially adapted for cordless or mobile telephones with selection means, e.g. keys, having functions defined by the mode or the status of the device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/50—Telephonic communication in combination with video communication

Abstract

PURPOSE: An automatic connection method of a video phone is provided to return to a speech state immediately in the event of negotiation failure in a training step for connection of video communication. CONSTITUTION: A video system is initiated according to a video key for video connection. Information including the maximum transmission speed, performance, standard and characteristics of a modem is transmitted and received between modems of transmitting and receiving sides according to the state of a line in a negotiation step. The state of the line is probed in a line probing step. The transmission speed is determined according to a connection speed in a training step. A mode is automatically converted into a speech mode when training fails in the training step.

Description

화상전화기의 자동접속 방법{ method for automatic connection of picture phone.}Automatic method of video phone call {method for automatic connection of picture phone.}

본 발명은 화상 전화기에 있어, 화상통신을 위한 접속 방법에 관한 것으로, 특히 화상통신 접속을 위한 트래이닝(Training)단계에서 실패(Negotitation failure)시에 재 트래이닝 중지를 위해 트래이닝에서 사용되지 않는 특정 톤(tone)을 송/수신자간에 주고받도록하여 모뎀의 타이머(Timer)에 설정된 시간이내에서도 무음대기 없이 바로 음성통화모드로 진입할 수 있도록 하는 통신방법을 제공하는데 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection method for video communication in a video telephone, and in particular, to a particular tone that is not used in the training to stop retraining in the event of a negotitation failure in the training step for a video communication connection. The present invention provides a communication method for allowing a transmitter / receiver to transmit and receive a tone so as to immediately enter a voice call mode without a silent standby even within a time set in a timer of a modem.

통신 및 영상의 압축/복원기술이 급격하게 발전하면서, 사용자의 음성은 물론 사용자의 화상까지도 수신측에 전송할 수 있는 화상 전화기가 개발되었다.With the rapid development of communication and video compression / restoration technologies, video telephones have been developed that can transmit not only a user's voice but also a user's image to a receiver.

이러한 화상 전화기는 사용자의 모습을 영상신호로 변환하기 위한 카메라부와, 영상신호를 전송하기 위해 압축하고, 전송되어져 오는 영상신호를 복원하기 위한 영상 압축/복원수단과, 압축된 영상신호를 전송하기 위한 모뎀부와, 복원된 영상신호를 표시(display)하기 위한 표시수단을 포함하여 구성된다.Such a video telephone includes a camera unit for converting a user's appearance into a video signal, a video compression / restore means for compressing to transmit a video signal, restoring a video signal being transmitted, and transmitting the compressed video signal. And a display unit for displaying a restored video signal.

도 1은 화상을 전송하고, 전송되어져 온 화상을 표시하기 위한 화상 전화기의 구성을 나타낸 것으로, 이의 구성을 개략적으로 설명하면 다음과 같다.1 shows a configuration of an image telephone for transmitting an image and displaying an image which has been transferred. The configuration thereof will be described as follows.

렌즈(1a)를 통해 입력되는 사용자의 모습은 CCD(1)를 통해 전기적인 영상신호로 변환되어 CCD 구동부(2)로 입력된다.The image of the user input through the lens 1a is converted into an electric image signal through the CCD 1 and input to the CCD driver 2.

CCD 구동부(2)는 이와 같이 입력되는 영상신호에 대하여 아날로그(analog) 신호를 보정하여 일정 레벨로 만든 후, 디지탈신호처리부(3)로 출력한다.The CCD driver 2 corrects the analog signal with respect to the input image signal as described above, makes it to a predetermined level, and outputs it to the digital signal processor 3.

디지탈신호처리부(DSP)(3)에서는 입력되는 화상을 외부로 전송하기 위한 영상 압축을 위해 휘도신호(Y), 색신호(Cb,Cr)의 일정 포맷으로 변환하여 영상 압축/복원부(5)로 출력한다.The digital signal processor (DSP) 3 converts the input image into a predetermined format of the luminance signal Y and the color signals Cb and Cr for image compression for external transmission to the image compression / restore unit 5. Output

영상 압축/복원부(5)에서는 입력된 영상신호의 종류에 따라 영상 압축을 실행하게되고, 이와 같이 압축된 영상신호는 통신 제어 및 인터페이스부(모뎀)(6)를 통해 통신회선으로 전송된다.The image compression / restoration unit 5 performs image compression according to the type of the input image signal, and the compressed image signal is transmitted to the communication line through the communication control and interface unit (modem) 6.

통신 제어 및 인터페이스부(6)를 통해 상대방으로 부터 수신되는 영상신호는영상 압축/복원부(5)를 통해 복원되어 디지탈신호처리부(3)로 입력되고, 디지탈신호처리부(3)에서는 입력되는 영상신호에 대하여 클램프(clamp), RGB 색제어, 밝기 제어 등을 실행한후, LCD 모니터(4)를 통해 입력된 화상을 표시하게 된다.The image signal received from the counterpart through the communication control and interface unit 6 is restored through the image compression / recovery unit 5 and input to the digital signal processing unit 3, and the image input from the digital signal processing unit 3. After the clamp, RGB color control, brightness control, etc. are performed on the signal, the image input through the LCD monitor 4 is displayed.

상기한 바와 같은 신호흐름은 제어부(7)에서 제어하게 된다.The signal flow as described above is controlled by the controller 7.

상기와 같이 모뎀을 통해 화상을 전송하고, 상대방으로 부터 화상을 접속하게 되는 데, 일반 전화통신 모드에서 화상 통신 모드로 전환하기 위해서는 서로 간의 통신 가능한 전송 속도 등을 정해 송신측과 수신측이 모뎀 접속을 하게 된다.As described above, an image is transmitted through a modem, and an image is connected from the other party. In order to switch from a general telephony mode to a video communication mode, a transmitter and a receiver are connected to a modem by determining a transmission speed that can be communicated with each other. Will be

이러한 접속단계를 살펴보면, 선로의 상태에 따라 최적으로 화상을 주고 받을 수 있도록 송신측과 수신측 모뎀 상호간에 모뎀의 최고 전송속도, 기능, 규격, 특성 등의 정보를 주고 받는 교섭단계(negotiation)와, 선로의 상태를 검사하는 라인 프로빙(line probing) 단계와, 접속속도에 따라 전송속도를 결정하는 트래이닝(training)단계를 통하여 접속하게 된다.In this connection step, the negotiation stage (negotiation) that exchanges information of the maximum transmission speed, function, specification, characteristics, etc. of the modem between the transmitting and receiving modems so that the image can be optimally transmitted and received according to the line condition. The connection is performed through a line probing step of checking the state of the line and a training step of determining a transmission speed according to the connection speed.

그러나 상기 트래이닝 단계에서 접속이 안될 경우 모뎀의 타이머(timer)에서 설정된 소정시간 동안 재접속 시도(1차, 2차, 3차....)를 반복하게 된다. 따라서 사용자가 통신선로의 이상이나 교환국설비가 노후된 통신접속이 어려운 환경에서 화상통화를 시도할 경우 빠른시간안에 접속시도(training)를 중단하고 음성통화모드로 들어가지 못하고 이 타이머(timer)가 설정된 시간이 종료될때까지 장시간 무음상태로 대기해야 하는 불편함이 있다. 또한 통신 상대방의 화상 전화기의 모뎀이 서로다른 타이머(timer)값에의해 (30초- 60초) 한쪽이 먼저 접속을 중단하고 다른쪽은 계속 접속을 시도할 경우, 먼저 접속을 중단한 쪽의 사용자는 상대편 전화기의 시끄러운 접속시도음을 계속 듣게되는 불편을 없애도록 하는데 있다.However, if the connection is not established in the training step, the reconnection attempt (first, second, third, ...) is repeated for a predetermined time set by the timer of the modem. Therefore, if a user attempts to make a video call in an environment where communication connection is difficult or an old communication facility is difficult, the user stops the connection attempt and does not enter the voice call mode in a short time. It is inconvenient to wait for a long time silent state until it is finished. Also, if one of the video call modems of the other party is disconnected first by the different timer value (30 seconds to 60 seconds), and the other side continues to try to connect, the user who first stopped the connection In order to eliminate the inconvenience of continuing to hear the loud connection attempt sound of the other phone.

본 발명은 화상 전화기에 있어, 화상 통신을 위한 접속 방법에 관한 것으로, 음성통화 모드에서 화상통화 모드로 전환할 경우 화상통신 접속을 위한 트래이닝(training)을 실행하는데 1차 트래이닝(training) 시도후 실패 (failure)시에 2차 트래이닝(training) 시도를 중지하고 바로 음성통화모드로 전환할 수 있도록 하기위해 트래이닝(training)단계에서 사용되지 않는 특정 톤(tone)을 송/수신 단말기의 모뎀간에 교환하여 트래이닝(training) 실패에 따른 음성통화 모드로 전환하는 통신방법 및 장치를 제공하는데 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection method for video communication in a video telephone, wherein when switching from a voice call mode to a video call mode, a training for a video communication connection fails to be executed after a first training attempt. In order to stop the second training attempt at the time of failure and immediately switch to the voice call mode, a specific tone which is not used in the training step is exchanged between modems of the transmitting / receiving terminal. The present invention provides a communication method and apparatus for switching to a voice call mode according to a training failure.

도 1은 화상 통신을 위한 일반적인 화상 전화기의 구성을 나타낸 블록도.1 is a block diagram showing a configuration of a general video telephone for video communication.

도 2는 본 발명에 해당하는 화상통신을 위한 송신자측 화상통신단말기 통신접속 플로우 챠트2 is a flowchart of a communication connection of a sender side video communication terminal for video communication according to the present invention;

도3은 본 발명에 해당하는 화상통신을 위한 수신자측 화상통신 단말기의 통신접속 플로우 챠트3 is a communication connection flowchart of a receiver side video communication terminal for video communication according to the present invention;

본 발명은 음성통신모드에서 화상통신모드로 전환한후 화상통신을 위한 접속 방법에 있어서,The present invention provides a connection method for video communication after switching from a voice communication mode to a video communication mode.

화상 접속을 위한 비디오 키이(Video key)의 선택여부를 판별하여 화상 시스템의 기동여부를 판단하는 과정과,Determining whether a video system is activated by determining whether a video key is selected for image access;

선로의 상태에 따라 송신측과 수신측 모뎀 상호간에 모뎀의 최고 전송속도, 기능, 규격, 특성 등의 정보를 주고 받는 교섭단계(negotiation)와Negotiation and communication between the sender and the receiver modem according to the condition of the line to exchange information such as the maximum transmission speed, function, specification, and characteristics of the modem.

선로의 상태를 검사하는 라인 프로빙 단계와A line probing step to check the condition of the track

접속속도에 따라 전송속도를 결정하는 트래이닝 단계와Training step to determine the transmission speed according to the connection speed

상기 트래이닝 단계에서 트래이닝이 실패할 경우 음성통화 모드로 자동 전환되는실행수순을 포함하여 이루어짐을 특징으로 한다.If the training fails in the training step, characterized in that it comprises the execution procedure to automatically switch to the voice call mode.

이와 같은 실행수순을 특징으로 하는 본 발명은 화상통신 접속시 통신선로의 이상이나 교환국의 설비가 노후하여 통신접속이 어려운 환경에서 화상통화를 시도할 경우 빠른시간안에 트래이닝(training) 재시도를 중단하고 음성모드로 복귀토록 하여 타이머(timer)가 종료될 때 까지 무음상태로 대기하는 불편이 없도록 하는데 있다. 또한 통신 상대방의 화상 전화기의 모뎀이 서로다른 타이머(timer)값에의해 (30초- 60초) 한쪽이 먼저 접속을 중단하고 다른쪽은 계속 접속을 시도할 경우, 먼저 접속을 중단한 쪽의 사용자는 상대편 전화기의 시끄러운 접속시도음을 계속 듣게되는 불편을 없애도록 하는데 있다.The present invention, which is characterized by the above-described execution procedure, stops retraining training when a video call is attempted in an environment in which communication line is difficult due to an error in a communication line or an equipment of an exchange station due to an obsolescence. By returning to the voice mode, there is no inconvenience of waiting in the silent state until the timer ends. Also, if one of the video call modems of the other party is disconnected first by the different timer value (30 seconds to 60 seconds), and the other side continues to try to connect, the user who first stopped the connection In order to eliminate the inconvenience of continuing to hear the loud connection attempt sound of the other phone.

첨부된 각 실시예로 본 발명의 화상통신 접속과정을 설명하면 다음과 같다.Referring to the video communication connection process of the present invention with each of the embodiments as follows.

먼저, 첨부된 도면 도 2내지 도 3에 도시된 실시예를 들어 설명하면, 제2도의 경우는 송신자의 화상통신 단말기에서 호(call)접속 상태에서 화상접속을 위한 수순을 나타낸 플로우 차트로서 사용자가 음성통화 단계에서 화상접속을 위한 비디오키(Video key)를 선택함에 의해 화상통신기기를 기동하는 단계와, 이후 시스템을 기동한 송신부의 모뎀은 선로의 상태에 따라 송신측과 수신측 모뎀 상호간에 모뎀의 최고 전송속도, 기능, 규격, 특성 등의 정보를 주고 받는 교섭단계(negotiation)를 진행하며, 선로의 상태를 검사하는 라인 프로빙 단계와First, referring to the embodiments illustrated in FIGS. 2 to 3, the second diagram is a flow chart showing a procedure for video connection in a call connection state at a sender's video communication terminal. Starting a video communication device by selecting a video key for video connection in the voice call step, and then, the modem of the transmitting unit which started the system has a modem between the transmitting side and the receiving side modem depending on the state of the line. Negotiation process that sends and receives information such as maximum transmission speed, function, specification, and characteristics of the network,

접속속도에 따라 전송속도를 결정하는 트래이닝 단계를 통해 상대측 모뎀과 제정보를 주고 받는 단계가 종료되면 상대방과 화상통화를 할수 있게 된다. 그러나 상기 트래이닝 단계에서 통신선로의 이상이나 교환국의 설비가 노후되어 접속이 실패(Failure)할 경우 재접속을 위해 모뎀의 타이머(timer)에서 설정된 소정시각이 경과 되었는지를 판단하고, 소정시간이 경과 되었을 경우는 자동적으로 음성모드로 전환되며, 상기 모뎀의 타이머(timer)에서 설정된 소정시각이 경과되지 않았을 경우는 통신 상대방에게 화상접속 시도를 중단하기 위해 트래이닝(training)단계에서 사용되지 않는 특정주파수의 톤(tone)을 통신 상대방과 주고 받아서 상기 소정시각이 경과되지 않았더라도 통신상대방과의 화상접속을 중단하고, 음성통화 모드로 자동전환하는데 있다. 제3도의 경우는 수신자의 화상통신 단말기에서 호(call)접속 상태에서 화상접속을 위한 수순을 나타낸 플로우 차트로서 사용자가 음성통화 단계에서 화상접속을 위한 비디오키(Video key)를 선택함에 의해 화상통신기기를 기동하는 단계와, 이후 시스템을 기동한 송신부의 모뎀은 선로의 상태에 따라 송신측과 수신측 모뎀 상호간에 모뎀의 최고 전송속도, 기능, 규격, 특성 등의 정보를 주고 받는 교섭단계(negotiation)를 진행하며, 선로의 상태를 검사하는 라인 프로빙 단계와 접속속도에 따라 전송속도를 결정하는 트래이닝 단계를 통해 상대측 모뎀과 제정보를 주고 받는 단계가 종료되면 상대방과 화상통화를 할수 있게 된다. 그러나 상기 트래이닝 단계에서 통신선로의 이상이나 교환국의 설비가 노후되어 접속이 실패(Failure)할 경우 재접속을 위해 모뎀의 타이머(timer)에서 설정된 소정시각이 경과 되었는지를 판단하고, 소정시간이 경과 되었을 경우는 자동적으로 음성모드로전환되며, 상기 모뎀의 타이머(timer)에서 설정된 소정시각이 경과되지 않았을 경우는 통신 상대방에게 화상접속 시도를 중단하기 위해 트래이닝(training)단계에서 사용되지 않는 특정주파수의 톤(tone)을 통신 상대방과 주고 받아서 상기 소정시각이 경과되지 않았더라도 통신상대방과의 화상접속을 중단하고, 음성통화 모드로 자동전환하는데 있다. 이상 상기에서 살펴본 바와 같이 송신자 화상통신 말기와 수신자 화상통신단말기에서 화상통신을 위한 접속에 있어서 트래이닝(training) 단계 실패(failure)시에 음성통화 모드로 자동 전환되는 과정은 동일한 수순임을 알 수있다.Through the training step of determining the transmission speed according to the connection speed, when the step of exchanging information with the other side modem is completed, the video call can be made with the other party. However, when the connection is failed due to an error in the communication line or the equipment of the switching center in the training step, it is determined whether the predetermined time set by the timer of the modem has elapsed for reconnection, and when the predetermined time has elapsed. Is automatically switched to the voice mode, and when a predetermined time set by the timer of the modem has not elapsed, a tone of a specific frequency not used in the training step to stop the video connection attempt from the communication counterpart ( Even if the predetermined time has not elapsed after the tone has been transmitted to and received from the communication counterpart, the video connection with the communication partner is interrupted and the voice call mode is automatically switched. 3 is a flow chart showing the procedure for video connection in a call connection state at the receiver's video communication terminal, and the user selects a video key for video connection in the voice call step. The start-up phase of the device, and the modem of the transmitting part that has started the system afterwards, negotiate and exchange information on the maximum transmission speed, function, specification, and characteristics of the modem between the transmitting side and the receiving side modem depending on the state of the line. Through the line probing step of checking the state of the line and the training step of determining the transmission speed according to the connection speed, the call is made with the other party when the step of exchanging information with the other side modem is completed. However, when the connection is failed due to an error in the communication line or the equipment of the switching center in the training step, it is determined whether the predetermined time set by the timer of the modem has elapsed for reconnection, and when the predetermined time has elapsed. Is automatically switched to the voice mode, and when a predetermined time set by the timer of the modem has not elapsed, a tone of a specific frequency not used in the training step to stop the video connection attempt from the communication counterpart ( Even if the predetermined time has not elapsed after the tone has been transmitted to and received from the communication counterpart, the video connection with the communication partner is interrupted and the voice call mode is automatically switched. As described above, it can be seen that the process of automatically switching to the voice call mode at the time of the training step failure in the connection for the video communication in the sender video communication terminal and the receiver video communication terminal is the same procedure.

이상에서 설명한 바와 같이, 기존의 통신프로토콜의 한계를 극복하고, 접속이 어려운 환경에서 사용자가 화상통신을 시도한 경우 빠른 시간내에 접속시도를 중단하고 음성통화 모드로 복귀하도록 하여 무음상태에서 장시간 대기하여야 하는 불편함을 없애도록 하였으며 또한 통신 상대방의 화상 전화기의 모뎀이 서로다른 타이머(timer)값에 의해 (30초- 60초) 한쪽이 먼저 접속을 중단하고 다른쪽은 계속 접속을 시도할 경우, 먼저 접속을 중단한 쪽의 사용자는 상대편 전화기의 시끄러운 접속시도음을 계속 듣게되는 불편을 없애도록 하는데 있다.As described above, if the user tries to overcome the limitations of the existing communication protocol and the video communication is difficult, the user should stop the connection attempt quickly and return to the voice call mode for a long time in the silent state. In addition, if the modem of the video telephone of the communication counterpart is disconnected first by the different timer value (30 seconds to 60 seconds) and the other side keeps trying to connect, the first connection is made. The user of the discontinued side is to eliminate the inconvenience of continuing to hear the loud connection attempt sound of the other phone.

Claims (4)

호(call)접속 상태에서 화상통신을 위한 통신모드를 설정함에 있어서,In setting a communication mode for video communication in a call connection state, 화상접속을 위한 비디오 키(Video key)에 의해 화상시스템을 기동시키는 단계와,Activating the image system by means of a video key for image connection; 선로의 상태에 따라 송신측과 수신측 모뎀 상호간에 모뎀의 최고 전송속도, 기능, 규격, 특성 등의 정보를 주고 받는 교섭단계(negotiation)와Negotiation and communication between the sender and the receiver modem according to the condition of the line to exchange information such as the maximum transmission speed, function, specification, and characteristics of the modem. 선로의 상태를 검사하는 라인 프로빙 단계와A line probing step to check the condition of the track 접속속도에 따라 전송속도를 결정하는 트래이닝 단계와Training step to determine the transmission speed according to the connection speed 상기 트래이닝 단계에서 트래이닝이 실패할 경우 음성통화 모드로 자동 전환되는If the training fails in the training step, the voice call mode is automatically switched. 전환단계로 구성된 것을 특징으로 하는 화상 전화기의 통신방법.A communication method for a video telephone, characterized in that configured to a switching step. 상기 제1항에 있어서, 자동 전환단계는The method of claim 1, wherein the automatic switching step 트래이닝이 실패할 경우 재 트래이닝을 위해 타이머에서 설정된 소정설정시간을 체크하여 소정설정시간이 경과하였을 경우 음성통화 모드로 자동 전환되는 것을 특징으로 하는 화상전화기의 통신방법.The method of communication of a video telephone, characterized in that if the training fails, the predetermined time set by the timer is checked for retraining, and when the predetermined time elapses, the call is automatically switched to the voice call mode. 상기 제2항에 있어서, 자동전환단계는The method of claim 2, wherein the automatic switching step 트래이닝이 실패할 경우 재 트래이닝을 위해 타이머에서 설정된 소정 설정시간을 체크하여 소정설정시간이 경과하지 않았을 경우 상대측 단말기로 음성모드로의 자동전환을 위한 특정톤(tone)을 송출하고,If the training fails, it checks the predetermined setting time set in the timer for retraining, and if the predetermined setting time has not elapsed, sends a specific tone for automatic switching to the voice mode to the opposite terminal. 상대측 단말기로 부터 특정톤(tone)을 수신을 확인하는 단계로 구성된 것을 특징으로 하는 화상전화기의 통신방법.And confirming reception of a specific tone from the opposite terminal. 상기 제3항에 있어서, 특정톤(tone)은The method of claim 3, wherein the specific tone is 트래이닝 단계에서 사용되지 않는 톤(tone)인것을 특징으로 하는 화상전화기의 통신 방법.A communication method of a video telephone, characterized in that the tone is not used in the training step.
KR1020000052588A 2000-09-06 2000-09-06 method for automatic connection of picture phone. KR20020019637A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100533020B1 (en) * 2002-11-12 2005-12-02 엘지전자 주식회사 Method for changing call mode
KR100646228B1 (en) * 2005-01-13 2006-11-23 에스케이 텔레콤주식회사 Method for Conversion from Voice Call into Video Call
KR100689119B1 (en) * 2005-10-25 2007-03-02 에스케이 텔레콤주식회사 Method and system for providing homepage service by using video telephony system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100533020B1 (en) * 2002-11-12 2005-12-02 엘지전자 주식회사 Method for changing call mode
KR100646228B1 (en) * 2005-01-13 2006-11-23 에스케이 텔레콤주식회사 Method for Conversion from Voice Call into Video Call
KR100689119B1 (en) * 2005-10-25 2007-03-02 에스케이 텔레콤주식회사 Method and system for providing homepage service by using video telephony system

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