WO2005025218A1 - Terminal de videophone et procede de realisation de ce terminal - Google Patents

Terminal de videophone et procede de realisation de ce terminal Download PDF

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Publication number
WO2005025218A1
WO2005025218A1 PCT/CN2003/001037 CN0301037W WO2005025218A1 WO 2005025218 A1 WO2005025218 A1 WO 2005025218A1 CN 0301037 W CN0301037 W CN 0301037W WO 2005025218 A1 WO2005025218 A1 WO 2005025218A1
Authority
WO
WIPO (PCT)
Prior art keywords
message
address
video
network
party
Prior art date
Application number
PCT/CN2003/001037
Other languages
English (en)
Chinese (zh)
Inventor
Tao Chen
Zhibin Sun
Can Shen
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to AU2003292844A priority Critical patent/AU2003292844A1/en
Priority to CNB2003801103772A priority patent/CN100399821C/zh
Publication of WO2005025218A1 publication Critical patent/WO2005025218A1/fr

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Classifications

    • 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
    • H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment

Definitions

  • Video telephone terminal and implementation method thereof are Video telephone terminal and implementation method thereof
  • the present invention relates to a method for transmitting multimedia digital information such as images, voices, and data in multimedia communications, and in particular, to using frequency shift keying (FSK), dual-tone multi-frequency (DTMF), or other modulation methods in a public telephone exchange network (PSTN).
  • FSK frequency shift keying
  • DTMF dual-tone multi-frequency
  • PSTN public telephone exchange network
  • IP Internet Protocol
  • video phones can be divided into three types, which are video phones based on IP networks, PSTN, and Integrated Services Data Network (ISDN).
  • IP networks PSTN
  • ISDN Integrated Services Data Network
  • IP videophones With the increasing improvement of broadband access technology, the communication quality of IP videophones has been continuously improved, and it has gradually become the preferred solution for videophone technology.
  • IP Network knowledge I have never even heard of IP addresses.
  • ADSL or other end users who dynamically obtain IP addresses need IP video phone point-to-point communication to support the central office equipment. The process is relatively complicated, so There are large barriers to use, which prevents the further development and popularization of IP videophones.
  • PSTN videophone uses the existing telephone network to transmit modulated digital digital information. It is convenient and simple to use, and it conforms to the daily habits of users dialing telephone numbers. However, the inherent defects of the original telephone lines limit the data transmission rate. It can only reach 56Kbi t / s, so it is impossible to expect high-quality video and audio effects, and it cannot guide the development trend of video phones.
  • ISDN networks can use existing user loops to access higher-speed, more stable multimedia data streams, but their complex service application processes, unbeatable prices, and limited bandwidth limit their continued development, and they are currently at a standstill. To the point of not moving forward.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the IP and PSTN videophones in the background art, and propose a method for implementing a videophone terminal using PSTN lines to transmit IP addresses and IP networks to transmit multimedia digital information.
  • the videophone terminal of the present invention includes:
  • the main control unit is configured to receive the remote video and audio data transmitted from the IP network access module, and after decoding, transmit the remote image information to the display module or the video and audio signal processing module, and transmit the remote audio information.
  • the main control unit collects the local image and sound information through the video and audio signal processing module, after encoding, transmits to the remote end through the IP network access module; the local image can also be directly transmitted to the display module;
  • a display module for receiving data from the main control unit to provide a good man-machine operation interface and display local or remote dynamic images
  • the video and audio signal processing module is used to perform A / D and D / A conversion on video and audio information to realize the input and output functions of video and audio data. On the one hand, it collects local video and audio information and transmits them to the A / D converter.
  • the main control unit receives the remote video and audio information transmitted by the main control unit, plays it locally after D / A conversion, or transmits it to the external video and audio interface after processing by the video and audio signal processing module, Play through external video and audio playback equipment;
  • IP network access module used to implement the communication access function with the IP network
  • the PSTN phone module receives FSK, DTMF, or other modulation signals transmitted from the PSTN line, parses out the IP address from the opposite end and forwards it to the main control unit, and the main control unit makes an IP network-based call; the opposite direction
  • the PSTN phone module receives the IP address from the main control unit and encapsulates it, and then sends it to the peer after modulation by FSK, DTMF, or other modulation methods.
  • the method of the present invention includes the following basic processes:
  • the first step is to establish the PSTN of the videophone terminal to terminal according to the ordinary way of dialing PSTN.
  • Voice channel
  • the second step is to start the videophone function through corresponding operations (such as clicking a button, touch screen, etc.).
  • the third step is to modulate digital messages such as IP addresses into analog signals and transmit them on the PSTN voice channel to complete the IP address Interactive process
  • the terminal device uses the obtained IP address to automatically make a call on the IP network, and establishes a video phone communication service based on the IP network, that is, transmitting multimedia data such as voice and video through the IP network.
  • the method of the present invention can also be extended to other broader application methods, such as using a common IP videophone terminal (labeled T1) to call the device (labeled T2) of the present invention, the process is as follows:
  • T1 calls the alias or IP address of T2;
  • the network server finds that T2 is not online, it searches the database to find the PSTN phone number corresponding to T2;
  • the service gateway calls T2 on the PSTN by using the telephone number, and establishes a communication link between the gateway and T2;
  • the gateway modulates the digital message into an analog signal and sends it to T2 to activate the videophone function of T2;
  • T2 connects to the IP network and receives the call from T1 on the IP network, or uses the IP address of T1 transmitted from the PSTN line to call T1 on the IP network.
  • the sixth step is to establish a videophone communication service based on the IP network.
  • the user only needs to dial the ordinary PST phone to establish a multimedia communication process of the videophone based on the IP network, and does not need to do any user operation for the IP network
  • a simple, convenient, and popular videophone function is realized, and at the same time, there is little or no need for telecom operators to participate in activities.
  • FIG. 1 is a structural diagram of a video telephone terminal according to the present invention.
  • FIG. 2 is a basic process of a method for implementing a videophone terminal according to the present invention.
  • FIG. 3 is an IP address interaction process proposed by the present invention.
  • FIG. 4 is a structural diagram of a message according to the present invention.
  • Fig. 5 is a flow chart of a pure IP videophone terminal calling the device according to the present invention.
  • FIG. 1 is a structural diagram of a video telephone terminal according to the present invention.
  • the device consists of five parts, namely the main control unit (MCU), liquid crystal display (LCD) module, video and audio signal processing module, IP network access module and PSTN telephone module. Its functions are:
  • the MCU is mainly used to complete multimedia data flow and related multimedia service protocol processing. That is, the MCU receives the remote video and audio data transmitted from the IP network access module, and after decoding processing, transmits the remote image information to the LCD or the video and audio signal processing module, and the remote sound information to the video and audio signals. Processing module.
  • the MCU collects the local image and sound information through the video and audio signal processing module. After encoding, the MCU transmits the remote image through the IP network access module; the local image can also be directly transmitted to the LCD.
  • the LCD display module receives data from the MCU to provide a good man-machine operation interface, and displays local or remote dynamic images.
  • the video and audio signal processing module performs A / D, D / A conversion on video and audio information, and realizes the input and output functions of video and audio data.
  • the local video and audio information is collected and transmitted to the MCU after A / D conversion.
  • the remote video and audio information transmitted by the MCU is received and transmitted locally after D / A conversion. After being processed by the audio signal processing module, it is transmitted to the external video and audio interfaces and played by the external video and audio playback equipment.
  • the IP network access module realizes the communication access function with the IP network
  • PSTN telephone module has PSTN telephone function, and it also has FSK, DTMF or other ways to adjust Send and receive signals.
  • the PSTN phone module receives FSK, DTMF, or other modulation signals transmitted from the PSTN line, parses out the IP address from the peer end and forwards it to the MCU, and the MCU makes an IP network-based call.
  • the PSTN phone module receives the IP address from the MCU's local end and encapsulates it, and then sends it to the peer end after modulation by FSK, DTMF, or other modulation methods.
  • a basic process of a method for implementing a videophone terminal according to the present invention includes the following steps:
  • the first step is to establish an end-to-end PSTN voice channel.
  • the purpose of establishing a voice channel is to use this channel to transmit analog modulated signals that carry IP addresses (which do not exclude other digital messages).
  • the calling party dials the PSTN number to start the voice channel establishment process, and the called party goes off-hook to complete the process.
  • the terminals directly use the channel to transmit analog modulation signals without the support and intervention of the bureau (PSTN telecommunication network operator) equipment.
  • Step 2 Activate the videophone function.
  • Both parties of the call must start the videophone function through a certain method (such as button or touch screen operation, menu operation, automatic start mode, etc.) to start transmitting analog signals carrying IP addresses.
  • a certain method such as button or touch screen operation, menu operation, automatic start mode, etc.
  • the other party When only one party activates the videophone function, the other party must have a wake-up function, that is, after receiving a signal from the other party, the videophone function is automatically started and related messages are started to be exchanged.
  • the terminal device modulates digital messages such as the IP address into analog signals and transmits them on the PSTN voice channel to complete the IP address interaction process.
  • the called terminal's main control module passes its own IP address to the PSTN module through the serial port.
  • the PSTN module modulates the address and sends it to the peer.
  • the calling PSTN module After receiving the modulation information, the calling PSTN module performs demodulation, and demodulates the demodulated
  • the IP address is passed to the main control module through the serial port.
  • the modulation method can use FSK, DTMF, or other modulation methods.
  • the interaction process can use duplex or half-duplex work.
  • the terminal device uses the obtained IP address to make an automatic call, and establishes a videophone communication service based on the IP network.
  • the calling party calls the IP address of the called party through the IP network, establishes a communication link based on the IP network, and uses this as a carrier to transmit digital audiovisual information to implement the videophone function.
  • Specific protocols can use ITU-T H.323, SIP or other multimedia service protocols.
  • the definitions of the calling party and the called party in the present invention are limited to the process of establishing a communication link on a certain bearer network.
  • the party that initiates the call is called the calling party
  • the party who initiates the call on the IP network is also called the calling party, but the calling party on the PSTN network and the calling party on the IP network are allowed to be different.
  • FIG. 3 it is a specific IP address interaction process that implements the third step of the method for implementing a videophone terminal according to the present invention.
  • the party that starts the videophone function first is the calling party, and the other party is the called party.
  • the caller initiates the interaction process, that is, the "IP address interactive start” message is modulated and sent to the callee.
  • the callee responds to the caller with an "acknowledgement" message and starts the corresponding network functions, such as activating the network and ADSL dial-up. .
  • the calling party After receiving the "confirmation" message from the called party, the calling party immediately sends a "Get IP Address Request” message to the called party, hoping that the called party provides its own IP address. After receiving the message, if the called party already knows its own IP address, it will immediately return the "called IP address” message, otherwise it will send a "request to wait” message to the calling party (shown as the dotted arrow in the figure) and tell the calling party. The calling party needs to wait for a period of time before sending the "called IP address” message. At this time, the called party is trying to obtain an IP address.
  • the caller After the caller receives the "request to wait” message, it returns the “confirmation” message and continues to wait until the called party sends a "called IP address” message.
  • the caller After the caller receives the "called IP address" message, the caller returns a "confirmation” message and ends the IP address interaction process. Then use the called IP address to initiate a call on the IP network.
  • each time the calling and called parties send a message each time the calling and called parties send a message, they need to start the corresponding timers. If they do not receive a response within the specified time, they must either resend the previous message or terminate the interaction process directly.
  • both parties start the IP address interaction process at the same time, a conflict may occur, that is, after either party sends an "IP address interaction start” message, they also receive the other party's "IP address interaction start” Message.
  • a conflict may occur, after either party has started the operation of the videophone function, it must wait for a random long time before sending out the "IP address interactive start”message; if a conflict occurs, the two parties wait for a random long time. If the other party receives the "IP address interaction start" message within the waiting time, the other party is considered to be the calling party, and it no longer sends the "IP address interaction start” message, and responds to the other party as the called party.
  • FIG. 4 is a structural diagram of a message proposed according to the IP address interaction process described in FIG. 3 of the present invention.
  • the entire message body consists of four parts: message type, message length, message content, and check digit. As needed, the message components can be increased or decreased.
  • the message type indicates the type of the message. According to the content of this part, the message types such as "IP address interaction start”, “Get IP address request”, “Request waiting”, “Called IP address”, and “Confirmation” can be distinguished.
  • the message length indicates the length of the message.
  • ⁇ In bytes, including the message type and the bytes occupied by the message length.
  • the message content is optional.
  • the message content of the "called IP address" message body must contain the called party's IP address.
  • the check digit is obtained by calculating the other three parts of the message body through a certain error correction algorithm, such as CRC check.
  • a communication process between a pure IP videophone terminal and a videophone terminal of the present invention is proposed according to the basic process of the present invention as a starting point.
  • T1 calls the alias or IP address of T2.
  • the network server finds that T2 is not online, it searches the database to find the PSTN phone number corresponding to T2.
  • the network server may be a gatekeeper (GK) of a network or a telecommunication operator, and establish a database according to the requirements of the videophone service, and map the IP address of the videophone terminal according to the present invention to the PSTN phone number, so as to implement the IP address to the PSTN Conversion of phone numbers.
  • GK gatekeeper
  • the service gateway calls T2 on the PSTN by using the telephone number, and establishes a communication link between the gateway and T2.
  • the gateway realizes the conversion from the IP service to the PSTN service, and converts the call with the IP address as the call to the phone number.
  • the communication link between the gateway and the called videophone terminal can be either a voice channel or a non-voice call state similar to that used in the caller ID function, that is, the FSK or DTMF signal is realized without going off-hook Transmission.
  • the gateway modulates the digital message into an analog signal and sends it to T2 to activate the videophone function of T2.
  • T2 connects to the IP network and receives a call from T1 on the IP network, or uses the IP address of T1 transmitted from the PSTN to call T1 on the IP network.
  • the sixth step is to establish a videophone communication service based on the IP network.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Telephonic Communication Services (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Cette invention se rapporte à un procédé de réalisation d'un terminal de vidéophone, associé à un procédé de transmission en communication multimédia, consistant: d'abord, en fonction du mode de numérotation du téléphone commun PSTN, à établir un canal vocal PSTN entre terminaux de vidéophone; puis à lancer une fonction de vidéophone; après que le dispositif terminal a transmis des informations numériques, telles que l'adresse IP, notamment, dans le canal vocal PSTN et qu'il les a modulé en signal analogique, à compléter le processus d'interaction de l'adresse IP; après que le dispositif terminal a lancé un appel dans le réseau IP mode automatique, en utilisant l'adresse IP obtenue, à établir un service de communication de vidéophone sur la base du réseau IP, c'est-à-dire à transmettre des données multimédia, telles que des données vocales et des données vidéo, notamment, via le réseau IP. En utilisant ce procédé, les utilisateurs peuvent établir un processus de communication multimédia de vidéophone uniquement par numérotation du téléphone PSTN commun et réaliser une fonction de vidéophone simple et attractive. Cette invention concerne également un terminal de vidéophone et un procédé de réalisation d'un terminal de vidéophone IP simple appelant le terminal de vidéophone.
PCT/CN2003/001037 2003-09-06 2003-12-04 Terminal de videophone et procede de realisation de ce terminal WO2005025218A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003292844A AU2003292844A1 (en) 2003-09-06 2003-12-04 A video phone terminal and realizing method
CNB2003801103772A CN100399821C (zh) 2003-09-06 2003-12-04 一种可视电话终端及其实现方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03140451 2003-09-06
CN03140451.0 2003-09-06

Publications (1)

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WO2005025218A1 true WO2005025218A1 (fr) 2005-03-17

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PCT/CN2003/001037 WO2005025218A1 (fr) 2003-09-06 2003-12-04 Terminal de videophone et procede de realisation de ce terminal

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CN (1) CN100399821C (fr)
AU (1) AU2003292844A1 (fr)
WO (1) WO2005025218A1 (fr)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN1937687B (zh) * 2006-08-31 2011-01-19 华为技术有限公司 一种可视电话终端自动配置和维护的参数传输方法
CN101335640B (zh) * 2007-06-25 2011-04-06 华为技术有限公司 一种通信终端自动获取配置的方法及设备
CN102292989A (zh) * 2011-06-15 2011-12-21 华为终端有限公司 一种音视频呼叫的方法、设备及系统
CN103826321A (zh) * 2012-11-19 2014-05-28 联想(北京)有限公司 一种电子设备连接的方法和设备
CN106792839A (zh) * 2017-03-30 2017-05-31 北京小米移动软件有限公司 通话控制的方法及装置

Families Citing this family (2)

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CN101489084B (zh) * 2008-01-15 2012-07-25 英华达(上海)电子有限公司 一种可视电话物理层通道的模拟方法和装置
CN102413308A (zh) * 2011-12-08 2012-04-11 深圳市迪威新软件技术有限公司 一种视频会议终端的点对点呼叫方法及视频会议终端

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WO2002009372A1 (fr) * 2000-07-22 2002-01-31 Giosys Co., Ltd Videophone internet
KR20030016085A (ko) * 2001-08-20 2003-02-26 주식회사 엔버전스 데이터 서버 운영 방법
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN1937687B (zh) * 2006-08-31 2011-01-19 华为技术有限公司 一种可视电话终端自动配置和维护的参数传输方法
CN101335640B (zh) * 2007-06-25 2011-04-06 华为技术有限公司 一种通信终端自动获取配置的方法及设备
CN102292989A (zh) * 2011-06-15 2011-12-21 华为终端有限公司 一种音视频呼叫的方法、设备及系统
CN103826321A (zh) * 2012-11-19 2014-05-28 联想(北京)有限公司 一种电子设备连接的方法和设备
CN103826321B (zh) * 2012-11-19 2017-11-03 联想(北京)有限公司 一种电子设备连接的方法和设备
CN106792839A (zh) * 2017-03-30 2017-05-31 北京小米移动软件有限公司 通话控制的方法及装置

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CN100399821C (zh) 2008-07-02
CN1802855A (zh) 2006-07-12
AU2003292844A1 (en) 2005-03-29

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