CN1630324A - Video telephone supporting PSTN service based on IP - Google Patents
Video telephone supporting PSTN service based on IP Download PDFInfo
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- CN1630324A CN1630324A CN 200310112551 CN200310112551A CN1630324A CN 1630324 A CN1630324 A CN 1630324A CN 200310112551 CN200310112551 CN 200310112551 CN 200310112551 A CN200310112551 A CN 200310112551A CN 1630324 A CN1630324 A CN 1630324A
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Abstract
This invention discloses an iP based video telephone supporting public telephone exchange network business, which contains micro computer with display terminal and video telephone user terminal software, audio telephone set and adapter, wherein the micro computer respectively connected with IP network and adapter, adapter respectively connected with public telephone exchange network and audio telephone set, microcomputer used as video terminal of video telephone, adapter connecting audio telephone set with micro computer and public telephone exchange network to make the audio telephone set to be used as the public phonetic terminal of video telephone and normal telephone.
Description
Technical field
The present invention relates to multimedia communication technology, relate in particular to a kind of video telephone of IP-based support public telephone switching network telephone service.
Background technology
Along with the progress in epoch and the raising of people's living standard, people no longer are confined to single traditional communication modes to the requirement of communication, no longer are satisfied with " only hear its sound, lose its people ", often need the exchanging of interaction of sound and image.Video-phone system is also sometimes referred to as video-telephone system, two different local individual or colonies, pass through video-phone system, sound, image data are passed mutually, reach instant and interactive communication, for people provide the novel communication that is different from traditional communication modes mode.Visual communication system based on multimedia has connected the world, and the aspectant interchange of information spreads all over each corner of the earth.
Video telephone comes across nineteen sixties the earliest, but all is not widely used all the time, and it is big many that the desired bandwidth ratio voice communication of one of them main cause video telephone is wanted, and the investment of whole video-phone system is huge.
High speed development along with broadband IP network, a large amount of construction of the infrastructure of broadband network, and the maturation of VoIP (VoIP:Voice over Iternet Protocol) technology, for new road has been opened up in the application of video telephone, so, video telephone is widely used in the IP network environment, has both solved the communication bandwidth problem, does not need to spend the huge investment current communication network of upgrading again.
But the mode of current IP-based video telephone or employing pure software realizes, perhaps adopts pure hardware mode to realize.The shortcoming of the mode of pure software is to use complicated operation, and the custom of making a phone call traditional with people do not conform to, and seriously relies on computer, and the service of video telephone just can't be provided when computer shutdown.Pure hardware mode need dispose independently radio phone terminal and handle image and sound, and such terminal equipment is complex structure often, and the cost height costs an arm and a leg, and has limited the popularization of video telephone to a certain extent.
Summary of the invention
Shortcoming at prior art, the video telephone that the purpose of this invention is to provide a kind of IP-based support public telephone switching network telephone service, the user does not need to dispose the radio phone terminal of any special use, utilize existing audio telephone to use as the voice terminal of video telephone, both can support IP-based video telephone, support simultaneously the plain old telephone of current public switched telephone network (PSTN:Public Switched TelephoneNetwork) again, do not change user's use habit.The user does not need very big investment just can use visual telephone service free on the broadband IP network easily like this, does not need to change simultaneously existing telephone terminal again.
In order to achieve the above object, video telephone of the present invention comprises microcomputer 101, audio telephone 103 and the adapter 104 that disposes display terminal and video telephone client software; Microcomputer 101 is connected with IP network 200, adapter 104 respectively, and adapter 104 is connected with public telephone switching network 300, audio telephone 103 respectively; Microcomputer 101 is as the video terminal of video telephone, and adapter 101 is used for audio telephone 103 is inserted microcomputer 101 and public telephone switching network 300, makes the public voice terminal of audio telephone 103 as video telephone and plain old telephone.
In above-mentioned video telephone:
Microcomputer 101 also disposes camera 102, and camera 102 is input sources of local image.
Adapter 104 is connected with microcomputer 101 by the USB connecting line.
When adapter 104 works on power and be in the video telephone mode of operation, be modeled into the computer sound card of the circumscribed of a USB interface, audio telephone 103 be modeled to the microphone and the loud speaker of described sound card; When not working on power, just directly audio telephone 103 and public telephone switching network 300 are not connected by adapter 104.
Adapter 104 is connected with public telephone switching network 300, audio telephone 103 respectively by the telephone wire of RJ11 interface.
Described video telephone client software is based on the VoIP of agreement (Voice over InternetProtocol) client software H.323.
When PSTN (public telephone switching network) phone is dialed or answered to video telephone 100, adapter 104 was connected audio telephone 103 and public telephone switching network 300; When video telephone 100 was dialed or answered video telephone, adapter 104 control microcomputers 101 became the video terminal of video telephone, and control audio telephone set 103 becomes the voice terminal of video telephone.
The present invention compared with prior art has following advantage and beneficial effect: (1) utilizes the voice terminal of existing audio telephone as video telephone, does not need special-purpose radio phone terminal; (2) on audio telephone, support IP-based video telephone and common pstn telephone simultaneously; (3) no matter be video telephone or pstn telephone, user's occupation mode does not all have to change; (4) adapter does not need extra power supply power supply; (5) when not powering on, can continue video telephone to answer or dial pstn telephone; (6) simple in structure, cost is low, and ratio of performance to price height is easily promoted the use of.
Description of drawings
Fig. 1 is a syndeton schematic diagram of the present invention.
Fig. 2 is the operation instruction figure of the present invention in network.
Embodiment
The present invention will be described in detail below in conjunction with accompanying drawing.
As shown in Figure 1, video telephone 100 of the present invention is made of microcomputer 101, camera 102, audio telephone 103 and adapter 104.Microcomputer 101 need dispose display, Ethernet card, operation has the client software of video telephone 100 on microcomputer, it is based on agreement H.323, can have the client software of same type to communicate with operation on other microcomputer on the IP network by Ethernet card, the other side's video image just be presented on the display of microcomputer.The client software program of video telephone is responsible for that other computer communicates and is connected on control and the IP network, connection management and control that the video telephone client software can adopt the NetMeeting under the Windows operating system to finish to communicate by letter between IP network.
The video telephone client software also has call treatment and control module and the slave computer module of communicating by letter with adapter 104 except the NetMeeting communication module of being responsible for IP network communication, these programs are fully transparent at running background to the user.
Adapter 104 is connected with microcomputer by the USB connecting line, and its function is that audio telephone is linked into microcomputer, as the voice terminal of video telephone.Operation has the program and a control program of communicating by letter with the video telephone client software in the adapter, monitors the state of audio telephone and the state of the outside line that is connected with public telephone switching network constantly, and gives client software in the microcomputer 101 these status reports; Adapter also receives the instruction from client software, can send multiple signal tone to audio telephone, as ring back tone, howler tone, busy tone etc., can also send dtmf signal to outside line, receives the dtmf signal that audio telephone sends.
Adapter 104 has the control circuit of relay switch and FPGA (Field Programmable Gate Array), under the commands for controlling of client software, the control circuit control relay of adapter connects audio telephone to outside line or microcomputer: can think that when audio telephone directly is connected with outside line the adapter of this moment is transparent, this moment, pstn telephone be answered or be dialed to audio telephone can and can be not influenced; When audio telephone connect to microcomputer, adapter was exactly the sound card of the simulation of an external USB interface concerning microcomputer, and audio telephone just provides microphone and the loudspeaker function on the simulation sound card.Adapter is given tacit consent to relay audio telephone is connected with outside line when not powering up work.
Camera 102, directly linking to each other with microcomputer, for the opposing party of video telephone provides the video image of local side, is the input source of local video, local video image is sent to the opposite end computer after having set up video phone call, simultaneously also can preview on the display of local microcomputer.
Audio telephone 103 is connected on the adapter, is the public voice terminal of video telephone and common pstn telephone.
As shown in Figure 2, video telephone 100 of the present invention is supported IP-based video telephone and common pstn telephone simultaneously, be connected with IP network 200 by Ethernet card on the one hand, one side is connected with public telephone switching network 300 by the telephone wire of RJ11 interface again.The communicating pair of video telephone requires all to use video telephone of the present invention, but also can accept the video phone call from the VoIP signal procedure of measured H.323 agreement.Any pstn telephone can also be answered or dial to video telephone 100, and promptly the other side both can be video telephone 100 of the present invention, also can be common audio telephone 400, and do not have video image this moment, has only voice service.IP-based video telephone and pstn telephone do not interfere with each other, and be separate.
Video telephone operation principle of the present invention is as follows:
When microcomputer started, adapter had also just worked on power, and where it is controlling the audio telephone connection, or moves the microcomputer that the video telephone client software is arranged, or public telephone switching network.4 kinds of situations of concrete branch:
(1) as the caller dials pstn telephone: user's off-hook is dialed the telephone number of a PSTN, it is that a PSTN calls out at this moment that the first item sign indicating number that adapter check is dialled just identifies immediately, so the control circuit of adapter connection audio telephone is connected with public telephone switching network, after this call establishment by public telephone switching network control, is released up to this calling fully.In the meantime, adapter is being monitored the connection status between the switch of audio telephone and public telephone switching network always.
(2) as the caller dials video telephone: dial video telephone and need set in advance a prefix, first number of dialing as the user is prefix for this reason, it is a video phone call that adapter just identifies immediately, this moment, adapter will be modeled to audio telephone microphone and the loud speaker that is connected on the sound card, the number that the user dialed is given the video telephone that moves client software on microcomputer, allow the video telephone client software according to the targeted customer of number call on broadband IP network that the user dialled, behind the call setup, on the display of microcomputer, just demonstrate callee's video image (if the callee has camera and working properly), just can carry out normal talking with the callee by audio telephone.Initiatively then video telephone end of on-hook of user, perhaps callee's on-hook finishes video telephone.
(3) answer the PSTN calling as the callee: the observation circuit of adapter is being monitored the state of the outside line that is connected with public telephone switching network and the state of audio telephone always, when the PSTN calling, if audio telephone is in hook state, then audio telephone and public telephone switching network are connected, allow the voice frequency telephone power ringing, like this, audio telephone just works in common pstn telephone pattern.
(4) answer video telephone as the callee: when the incoming call user is arranged on the network, the video telephone client software that moves on microcomputer just monitors immediately, on display, give visual cues on the one hand to the user, send instruction to adapter on the one hand, indication has the incoming call of video telephone, so just will being in the audio telephone of idle condition, the control circuit of adapter is linked into microcomputer, the disconnection telephone set is connected with public telephone switching network, and to audio telephone transmission bell signal, when user's off-hook, adapter just monitors immediately, and to video telephone client software report, the video telephone client is just mutual and connect this calling with Calling Side, and begins at transmission over networks sound and image, wherein the other side's video image just is presented on the display of microcomputer, and speech is then exchanged by audio telephone.
When microcomputer is not activated, adapter does not work on power yet, this moment, adapter was connected audio telephone and public telephone switching network, the call function of telephone service is provided by public telephone switching network fully, do not have visual telephone service this moment, and the processes such as foundation of dialing, ring, conversation are to work between the switch of audio telephone and public telephone switching network fully.
Claims (7)
1, a kind of video telephone (100) of IP-based support public telephone switching network telephone service is characterized in that, it comprises microcomputer (101), audio telephone (103) and the adapter (104) that disposes display terminal and video telephone client software; Microcomputer (101) is connected with IP network (200), adapter (104) respectively, and adapter (104) is connected with public telephone switching network (300), audio telephone (103) respectively; Microcomputer (101) is as the video terminal of video telephone, adapter (101) is used for audio telephone (103) is inserted microcomputer (101) and public telephone switching network (300), makes the public voice terminal of audio telephone (103) as video telephone and plain old telephone.
2, video telephone as claimed in claim 1 is characterized in that, microcomputer (101) also disposes camera (102), and camera (102) is the input source of local image.
3, video telephone as claimed in claim 1 is characterized in that, adapter (104) is connected with microcomputer (101) by the USB connecting line.
4, video telephone as claimed in claim 3, it is characterized in that, when adapter (104) works on power and is in the video telephone mode of operation, be modeled into the computer sound card of the circumscribed of a USB interface, audio telephone (103) be modeled to the microphone and the loud speaker of described sound card; When adapter (104) is just directly connected audio telephone (103) and public telephone switching network (300) when not working on power.
5, video telephone as claimed in claim 1 is characterized in that, adapter (104) is connected with public telephone switching network (300), audio telephone (103) respectively by the telephone wire of RJ11 interface.
6, video telephone as claimed in claim 1 is characterized in that, described video telephone client software is based on the VoIP of agreement (Voice over Internet Protocol) client software H.323.
7, video telephone as claimed in claim 1 is characterized in that, when PSTN (public telephone switching network) phone is dialed or answered to video telephone (100), adapter (104) was connected audio telephone (103) and public telephone switching network (300); When video telephone (100) was dialed or answered video telephone, adapter (104) control microcomputer (101) became the video terminal of video telephone, and control audio telephone set (103) becomes the voice terminal of video telephone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112551 CN1630324A (en) | 2003-12-15 | 2003-12-15 | Video telephone supporting PSTN service based on IP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112551 CN1630324A (en) | 2003-12-15 | 2003-12-15 | Video telephone supporting PSTN service based on IP |
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| Publication Number | Publication Date |
|---|---|
| CN1630324A true CN1630324A (en) | 2005-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310112551 Pending CN1630324A (en) | 2003-12-15 | 2003-12-15 | Video telephone supporting PSTN service based on IP |
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| CN (1) | CN1630324A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017000781A1 (en) * | 2015-06-30 | 2017-01-05 | 华为技术有限公司 | Video communication method and apparatus |
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2003
- 2003-12-15 CN CN 200310112551 patent/CN1630324A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017000781A1 (en) * | 2015-06-30 | 2017-01-05 | 华为技术有限公司 | Video communication method and apparatus |
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