CN101500129A - Method for implementing visible phone call combining PSTN network and IP network - Google Patents
Method for implementing visible phone call combining PSTN network and IP network Download PDFInfo
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- CN101500129A CN101500129A CNA2008100653676A CN200810065367A CN101500129A CN 101500129 A CN101500129 A CN 101500129A CN A2008100653676 A CNA2008100653676 A CN A2008100653676A CN 200810065367 A CN200810065367 A CN 200810065367A CN 101500129 A CN101500129 A CN 101500129A
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Abstract
The invention relates to a method for realizing a video telephone by combining a PSTN and an IP network, comprising the steps as follows: a calling party requests connection and a called party makes a response; the method particularly comprises the steps as follows: the calling party and the called party start video connection at a video phone terminal respectively; the terminals of the two parties are accessed to the IP network so as to obtain IP addresses; the IP addresses are registered on an equipment management server by the terminals of the two parties; the video telephone terminals of the two parties exchange the equipment numbers by the signal negotiation in PSTN network band; the video telephone terminals of the two parties obtain the IP addresses of the two parties by the equipment management server; and video communication is established by video protocol negotiation. The method for realizing the video telephone can both have the convenience of video telephones based on the PSTN and the high-quality video effect of IP video telephones and guarantees the quality of voice; and a P2P (Peer to Peer) mode is adopted, and core network equipment such as an IP server and the like do not need to be added, thus being convenient for use.
Description
Technical field
The present invention relates to be suitable for the telephonic communication system with other electric system combinations, particularly relate on same circuit the communication system of transporting speech and telegram or other data simultaneously, relate in particular to the method that realizes video telephone in conjunction with PSTN network and IP network.
Background technology
The application of video telephone at present also is in the group user aspect, and domestic. applications is in the budding stage, is used on a large scale, and it mainly is because need to reach the reason of a balance between the multiple factors such as terminal price, ease of use and video quality.Along with the appearance of single-chip solution, the terminal price problem that the restriction video telephone enters family will progressively solve.
1964, U.S.'s Bell Laboratory proposed first video telephone solution, but owing to be subjected to the restriction of various technical conditions, video telephone never makes substantial progress.Late nineteen eighties, continuous development along with communication, computer, voice and video encoding and decoding technique, video telephone has obtained developing rapidly in countries in the world, in order to realize interconnecting, to promote the development of video telephone and video conferencing system, the ITU of International Telecommunications Union (International Telecom Union) just sets up the group of a research video conference in the eighties, to based on different network environments, has formulated a series of video conference standards.
At present the visual application at the personal user mainly is three kinds: based on the video telephone of PSTN, IP-based video telephone and based on the visual application of software on the personal computer.PSTN (Public Switched Telephone Network) video telephone is meant the terminal equipment that can send and receive audio frequency and video information on an analog of telephone line simultaneously; IP (InternetProtocol) video telephone generally adopts ITU-TH.323 agreement or SIP (Session Initiate Protocol) agreement to carry out video communication, the ITU-TH.323 agreement, it is a video conferencing system standard based on transmission control protocol/Internet Protocol TCP/IP (Transmissioncontrol protocol/Internet Portocol) network, SIP is an application controls (signaling) agreement that is put forward by IETF (InternetEngineering Task Force), it can be used to create, the Multimedia session process that modification and a plurality of participants that terminate participate in, the member who participates in session can pass through the multicast mode, the form of clean culture networking or both combinations communicates; Very extensive based on the visual application of the instant messaging of PC, a lot of people utilize online chat softwares such as QQ, MSN to carry out exchanging based on the video/audio of personal computer.
The PSTN video telephone is meant the terminal equipment that can send and receive audio frequency and video information on an analog of telephone line simultaneously, the use of this video telephone is very simple, the user can directly purchase and not need to obtain the cooperation of the network of operator, directly receive on the telephone wire and get final product, the PSTN video telephone need satisfy YD/T 1237-2002 " network access specification requirement of PSTN video telephone and method of testing " standard, the networking of PSTN video telephone has directly utilized the PSTN network, and its network diagram as shown in Figure 2.
The process of setting up of PSTN video telephone is, the calling party connects according to the request of analog telephone rules, in case complete successfully call setup, be introduced into the analog telephone communications status, enter the video telephone establishment stage by user's manual operations then, after video communication was set up, the user can select to finish conversation or get back to the simulation talking state.
The greatest problem of PSTN video telephone is the quality of image and voice, and the communication quality of code requirement is:
Public intermediate form CIF (Common Intermediate Format): 288 row * 352 pixels were not less than for 3 frame/seconds;
1/4 public intermediate form QCIF (Quarter Common Intermediate Format): 144 row * 176 pixels were not less than for 10 frame/seconds;
Son 1/4 public intermediate form SQCIF (Sub Quarter Common Intermediate Format): 96 row * 128 pixels were not less than for 15 frame/seconds.
With most IP video telephone support CIF:288 capable * 352 pixels, 25-30/ compares second, the visual telephone video quality that realizes by PSTN has very big gap, this is the major obstacle of PSTN video telephony applications.
The IP video telephone can solve the video quality problem of PSTN video telephone, and the IP video telephone mainly utilizes IP network to carry out video transmission, and its network diagram as shown in Figure 3.
Most IP video telephone has the function of plain old telephone, therefore can utilize PSTN to carry out voice communication, the IP video telephone can carry out video communication by IP network, the most needs is routed to correct destination to visual telephone by equipment such as gatekeeper's equipment GK (Gate Keeper) in the network or SIPserver, concerning the IP video telephone, PSTN network and IP network are independently, therefore when calling out, need this phone of judgement to walk the PSTN network or walk IP network, general design is by judging that this telephone number is that pstn telephone number and IP video telephone number carry out network selection, certainly also there is the IP video telephone of part to lack the function of plain old telephone by IP network communication.
Based on the video communication network figure of PC as shown in Figure 4, visual most widely used general based on the instant messaging of PC, as long as communicating pair broadband access network, just can carry out video communication based on PC, because do not need communication cost, cheap, and along with development of technology, communication quality is relatively good under most situation, but requires to install on the network of operator IMServer (Instant Messaging Server) server.Most of users of software video have adopted JICQ, QQ for example, and softwares such as MSN carry out video communication, and software video also has other scheme certainly, but this mode requires both sides' operation that coomputerates, and simultaneously online, use inconvenience.
To sum up, the PSTN video telephone is easy to use, but poor video quality; IP visual telephone video quality is good, but needs core network device, needs terminal forever online, needs the user to understand the other side's device type, has caused the expense of the inconvenient and possible broadband access network that uses to increase; Face-to-face communication based on PC is cheap, but use is least convenient, the people who does not coomputerate, for example most of old men, can not adopt this mode to communicate by letter, and the maximum application scene of video telephone is house person, uses between the relatives and between the close friend, has only the old man a side, children etc. need crowd simple to operate, and it is less feasible to use PC to carry out video communication, in addition, the start-up course of computer is long, also is the factor of an inconvenience.
The method of realization video telephone recited above has the following disadvantages:
1, the PSTN video telephone is easy to use, but poor video quality;
2, IP visual telephone video quality is good, but needs core network device, needs terminal forever online, needs the user to understand the other side's device type, uses inconvenience, broadband access network expense height;
3, cheap based on the face-to-face communication of PC, require both sides' operation that coomputerates, and need simultaneously onlinely, to use inconveniently, the start-up course of computer is long;
4, the QOS of the video communication of IP based network (Quality of Service) can not guarantee, has the IP network quality problems, can influence voice and video;
5, the video communication of IP based network, both sides are pstn telephone and IP video telephone number simultaneously, is difficult to use on a large scale.
Summary of the invention
The technical problem to be solved in the present invention is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of method that realizes video telephone in conjunction with PSTN network and IP network.
The present invention solve the technical problem can be by realizing by the following technical solutions, provides a kind of and realize the method for video telephone in conjunction with PSTN network and IP network, and the method comprising the steps of:
A, calling party connect according to analog telephone dialing rule request;
B, called party answer are finished a common pstn telephone calling procedure;
Also comprise step:
C, caller and called both sides are pressing the corresponding function key on the radio phone terminal separately, start video and connect;
D, caller and each leisure of called both sides can the phonovision terminal judges whether this machine has inserted IP network, if judged result is a "No", then in square starting terminal broadband dial-up access IP network, each terminal obtains IP address, continues to carry out next step;
E, if the judged result among the step D is a "Yes", caller and called both sides separately will be can the phonovision terminal the IP address information register to device management server;
F, caller and called both sides' radio phone terminal is consulted mutual both sides' device number information by PSTN network inband signaling;
G, caller and called both sides' radio phone terminal after obtaining the other side's device number information, the IP address that obtains the other side by device management server;
H, both sides' radio phone terminal consults to set up face-to-face communication by video protocols;
After I, the end of conversation, user's on-hook disconnects broadband connection.
Radio phone terminal of the present invention can adopt the radio phone terminal of band network dialling function, and the software that operates in the radio phone terminal operation by change enables to realize Overall Steps recited above.
Among the described step H, after both sides have set up face-to-face communication, can utilize the function key on both sides' radio phone terminal to select video data to transmit by IP network, voice data transmits by the PSTN network, perhaps video data and voice data all transmit by IP network, need to disconnect original normal talking PSTN network this moment.
The described video protocols of step H is H.323 agreement, Session Initiation Protocol or a P2P agreement of ITU-T.
The described device management server of step e is a computer equipment, computer program that operation is preset in it, the IP address of radio phone terminal that can be by this program registration caller and called both sides, and can penetrating NAT or fire compartment wall enter internal lan; Described device management server is installed in the IP network side, needs the configuration public network IP address, conducts interviews for caller and called both sides' radio phone terminal.
Step D described broadband dialing can be the PPPoE dialing or obtain the IP address by DHCP.
Compare with prior art, the beneficial effect of technique scheme of the present invention is:
1, the method for realization video telephone of the present invention, can take into account convenience based on the PSTN video telephone, the effect of the high-quality video of IP video telephone can be reached simultaneously, under the unwarrantable situation of IP network quality Q OS (Quality ofService), the quality of voice can be guaranteed;
2, adopt the IP broadband to carry out video transmission, guaranteed the quality of video;
3, adopted the mode of P2P (Peer to Peer), need not increase core network devices such as IP server, used very convenient.
Description of drawings
Fig. 1 is the realization flow figure of video telephone implementation method of the present invention;
Fig. 2 is based on the network diagram that the PSTN network is realized video telephone;
Fig. 3 is based on the network diagram that IP network realizes video telephone;
Fig. 4 is based on the network diagram that the software that moves on the computer is realized video telephone;
Fig. 5 is the network diagram of realization video telephone of the present invention.
Embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in each accompanying drawing.
The present invention's the method in conjunction with PSTN network and IP network realization video telephone comprises step:
A, step 100 as shown in Figure 1, the calling party connects according to analog telephone dialing rule request;
B, called party answer are finished common pstn telephone calling procedure, a step 101 as shown in Figure 1;
Especially, further comprising the steps of:
C, step 102 as shown in Figure 1, caller and called both sides are pressing the corresponding function key on the radio phone terminal separately, start video and connect;
D, step 103 as shown in Figure 1, caller and each leisure of called both sides can the phonovision terminal judges whether this machine has inserted IP network, if judged result is a "No", then in square starting terminal broadband dial-up access IP network, each terminal obtains the IP address, continues to carry out next step;
E, if the judged result among the step D is a "Yes", caller and called both sides separately will be can the phonovision terminal the IP address information register to device management server, this process is with reference to step 104 as shown in Figure 1;
F, step 105 as shown in Figure 1, caller and called both sides' radio phone terminal is consulted mutual both sides' device number information by PSTN network inband signaling;
G, caller and called both sides' radio phone terminal after obtaining the other side's device number information, the IP address that obtains the other side by device management server, step 106 as shown in Figure 1;
H, step 107 as shown in Figure 1, both sides' radio phone terminal consults to set up face-to-face communication by video protocols;
I, step 108 as shown in Figure 1, after the end of conversation, user's on-hook disconnects broadband connection.
Radio phone terminal of the present invention can adopt the radio phone terminal of band network dialling function, and the software that operates in the radio phone terminal operation by change enables to realize Overall Steps recited above.
Above among the described step H, after both sides have set up face-to-face communication, can utilize the corresponding function key to select video data to transmit at both sides' radio phone terminal by IP network, voice data transmits by the PSTN network, the person is after both sides have set up face-to-face communication, utilize the function key on the radio phone terminal to select video data and voice data all to transmit by IP network, disconnect original normal talking PSTN network by the corresponding button on the video terminal this moment.
The described video protocols of step H is ITU-TH.323 agreement, Session Initiation Protocol or P2P agreement.
The described device management server of step e is a computer equipment, the program that operation is preset in it.
Described device management server is by the operation computer program registration caller within it and the IP address of called both sides' radio phone terminal, and can penetrating NAT or fire compartment wall enter internal lan.
Described device management server is installed in the IP network side, needs the configuration public network IP address, conducts interviews for caller and called both sides' radio phone terminal.
Step D described broadband dialing can be the PPPoE dialing or obtain the IP address by DHCP.
The described PSTN network of step H inband signaling is fsk signal, dtmf signal or utilizes modem communication to realize alternately.
When video data transmits by IP network, when voice data transmits by the PSTN network, need to realize the synchronous of video data and voice data in the certain time-delay of PSTN circuit introducing by the time-delay and the shake of RTCP (Real-time Transport Control Protocol) agreement Statistics Division IP network.
Claims (10)
1, a kind of method in conjunction with PSTN network and IP network realization video telephone comprises step:
A, calling party connect according to the telephone dialing rule request;
B, called party answer are finished a common pstn telephone calling procedure;
It is characterized in that, also comprise step:
C, caller and called both sides are pressing the corresponding function key on the radio phone terminal separately, start video and connect;
D, caller and each leisure of called both sides can the phonovision terminal judges whether this machine has inserted IP network, if judged result is a "No", then in square starting terminal broadband dial-up access IP network, each terminal obtains IP address, continues to carry out next step;
E, if the judged result among the step D is a "Yes", caller and called both sides separately will be can the phonovision terminal the IP address information register to device management server;
F, caller and called both sides' radio phone terminal is consulted mutual both sides' device number information by PSTN network inband signaling;
G, caller and called both sides' radio phone terminal after obtaining the other side's device number information, the IP address that obtains the other side by device management server;
H, both sides' radio phone terminal consults to set up face-to-face communication by video protocols;
After I, the end of conversation, user's on-hook disconnects broadband connection.
2, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
Among the described step H, after both sides have set up face-to-face communication, can select video data to transmit by IP network on both sides' radio phone terminal, voice data transmits by the PSTN network.
3, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
Among the described step H, after both sides have set up face-to-face communication, can on radio phone terminal, select video data and voice data all to transmit, need to disconnect original normal talking PSTN network this moment by IP network.
4, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
The described video protocols of step H is H.323 agreement, Session Initiation Protocol or a P2P agreement of ITU-T.
5, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
The described device management server of step e is a computer equipment, the computer program that operation is preset in it.
6, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
Described device management server is by the operation computer program registration caller within it and the IP address of called both sides' radio phone terminal, and can penetrating NAT or fire compartment wall enter internal lan.
7, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
Described device management server is installed in the IP network side, needs the configuration public network IP address, conducts interviews for caller and called both sides' radio phone terminal.
8, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
Step D described broadband dialing can be the PPPoE dialing or obtain the IP address by DHCP.
9, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 1 is characterized in that:
The described PSTN network of step H inband signaling is fsk signal, dtmf signal or utilizes modem communication to realize alternately.
10, the method in conjunction with PSTN and IP network realization video telephone as claimed in claim 2 is characterized in that:
When video data transmits by IP network, when voice data transmits by the PSTN network, need to realize the synchronous of video data and voice data in the certain time-delay of PSTN circuit introducing by the time-delay and the shake of rtcp protocol Statistics Division IP network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100653676A CN101500129A (en) | 2008-02-01 | 2008-02-01 | Method for implementing visible phone call combining PSTN network and IP network |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100653676A CN101500129A (en) | 2008-02-01 | 2008-02-01 | Method for implementing visible phone call combining PSTN network and IP network |
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| CN101500129A true CN101500129A (en) | 2009-08-05 |
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| CNA2008100653676A Pending CN101500129A (en) | 2008-02-01 | 2008-02-01 | Method for implementing visible phone call combining PSTN network and IP network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986911A (en) * | 2014-05-20 | 2014-08-13 | 兴天通讯技术（天津）有限公司 | Visiting side communication device, visited side communication device and visiting system |
| CN104811583A (en) * | 2015-05-06 | 2015-07-29 | 广州海格通信集团股份有限公司 | Video and audio synchronizing device and method |
-
2008
- 2008-02-01 CN CNA2008100653676A patent/CN101500129A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986911A (en) * | 2014-05-20 | 2014-08-13 | 兴天通讯技术（天津）有限公司 | Visiting side communication device, visited side communication device and visiting system |
| CN104811583A (en) * | 2015-05-06 | 2015-07-29 | 广州海格通信集团股份有限公司 | Video and audio synchronizing device and method |
| CN104811583B (en) * | 2015-05-06 | 2018-03-20 | 广州海格通信集团股份有限公司 | A kind of device and method of audio-visual synchronization |
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Open date: 20090805 |