CN1564594A - Visual telephone compatible public telephone switched network with protocal network of internet - Google Patents
Visual telephone compatible public telephone switched network with protocal network of internet Download PDFInfo
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- CN1564594A CN1564594A CN 200410017257 CN200410017257A CN1564594A CN 1564594 A CN1564594 A CN 1564594A CN 200410017257 CN200410017257 CN 200410017257 CN 200410017257 A CN200410017257 A CN 200410017257A CN 1564594 A CN1564594 A CN 1564594A
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Abstract
The videophone set consists of a DSPCPU control core, a memory, a video converter for A/D, D/A conversion, an audio MD and D/A converter, a video interface circuit, an audio interface circuit, a bus arbitration and control circuit, a keyboard, an Ethernet interface circuit, a PSTN module and a PSTN interface circuit. The invention can implement real time bi-directional transmission of audio and video data on the PSTN and IP network, or implement pure speech call on PSTN network.
Description
Technical field
The present invention relates to a kind of network data transmission device, specifically, the present invention relates to a kind of IP-based LAN local area network (LAN) or Internet Internet and carry out Visual communications, realize voice and image transmitted in both directions simultaneously, also can utilize based on network implementation realize voice and the image while transmitted in both directions of PSTN (public switched telephone network (PSTN)) or be used for the device of simple normal speech telephonic communication.
Background technology
Along with development of internet technology, the video telephone set of IP based network has appearred, and it can realize high-quality image transmission and audio transmission under the network condition in broadband, changed the exchange way that people " only heard its sound and lose its people " in the past.But the audio telephone that generally uses can only be beaten plain old telephone on the PSTN network at present, and the video telephone set of IP based network also can only use in the environment of IP network, and the video telephone set of compatible PSTN and IP network does not have the precedent of succeeding in developing as yet.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of video telephone set of taking compatible PSTN of reasonably easy communication modes and IP network is provided.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The invention provides the video telephone set of a kind of compatible PSTN and IP network, contain DSPCPU processing and control module, memory, video a/d and D/A, audio A/D and D/A, video interface circuit, audio interface circuit, bus arbitration and control circuit, keyboard, ethernet interface circuit, PSTN module, PSTN interface circuit, described DSPCPU processing and control module is connected with control circuit, keyboard, ethernet interface circuit and PSTN module with D/A, bus arbitration with D/A, audio A/D with memory, video a/d respectively; Described video a/d is connected with video interface circuit with D/A; Described audio A/D is connected with audio interface circuit with D/A; Described PSTN module is connected with the PSTN interface circuit.
DSPCPU processing and control module of the present invention is connected by the data address control bus with memory, and the DSPCPU processing and control module is connected by the ITU656 bus with D/A with video a/d; The DSPCPU processing and control module is connected by the IIS bus with D/A with audio A/D; The DSPCPU processing and control module is connected by the XIO bus with control circuit, keyboard, ethernet interface circuit with bus arbitration; The DSPCPU processing and control module is connected by universal serial bus with the PSTN module.
PSTN module of the present invention is connected by analog signal line with the PSTN interface circuit.
Compared with prior art, the invention has the beneficial effects as follows:
The video telephone set of compatible PSTN provided by the invention and IP network can utilize IP-based LAN local area network (LAN) or Internet Internet to carry out Visual communications, realizes voice and image transmitted in both directions simultaneously; Also can utilize based on the network implementation realize voice of PSTN (public switched telephone network (PSTN)) and image transmitted in both directions or be used for simple normal speech telephonic communication simultaneously; The general utility functions that not only have video telephone set on IP network: the two-way real-time Transmission of voice and image, and have the function of transmitting-receiving short message, tone information, telephone directory, and has the function that on the PSTN network, realizes voice and image transmitted in both directions or be used for simple normal speech telephonic communication; The present invention has video input/output interface, audio frequency input/output interface, can connect audio-visual devices such as video camera, television set, monitor, microphone, audio amplifier.The present invention is applicable to broadband network and the common public telephone networks of PSTN such as LAN, VPN, xDSL, can be widely used in the video intercom and the communication on telephone of Web conference, business meeting, long-distance education, remote interview, kith and kin's gathering.
Description of drawings
Fig. 1 is the structured flowchart of a specific embodiment 1 among the present invention.
Fig. 2 is the applicating flow chart of specific embodiment 1 among the present invention.
Embodiment
With reference to the accompanying drawings 1 and 2, describe the present invention below in conjunction with a specific embodiment 1.
The video telephone set of compatible PSTN and IP network in the specific embodiment 1 contains DSPCPU processing and control module (1), memory (2), video a/d and D/A (3), audio A/D and D/A (4), video interface circuit (5), audio interface circuit (6), bus arbitration and control circuit (7), keyboard (8), ethernet interface circuit (9), PSTN module (10), PSTN interface circuit (11).
DSPCPU processing and control module (1) is connected with memory (2) by the data address control bus; Be connected with D/A (3) with video a/d by the ITU656 bus; Be connected with D/A (4) with audio A/D by the IIS bus; Be connected with control circuit (7), keyboard (8), ethernet interface circuit (9) with bus arbitration by the XIO bus; Be connected with PSTN module (11) by universal serial bus.
PSTN module (10) is connected with PSTN interface circuit (11) by analog signal line.
Video a/d is connected with video interface circuit (5) with D/A (3); Audio A/D is connected with audio interface circuit (6) with D/A (4).
In the present embodiment, DSPCPU processing and control module (1) adopts the TriMedia multimedia processor of philips company, this kind of processor is that philips company develops at multimedia application specially, belong to flush bonding processor, it is integrated MCU (micro-control unit) and two powerful cores of DSP (Digital Signal Processing) make the performance of image coding and decoding improve greatly.
Memory (2) comprises SDRAM, EEPROM, FLASH, is respectively applied for storage execution command and deal with data, start-up routine and application program.
Video a/d and D/A (3) comprise to the video a/d conversion with to the video d/a conversion, are respectively applied for analog video signal is converted to digital video signal and digital video signal is converted to analog video signal;
Audio A/D and D/A (4) comprise to audio A/D conversion with to audio frequency D/A conversion, are respectively applied for simulated audio signal is converted to digital audio and video signals and digital audio and video signals is converted to simulated audio signal;
Video interface circuit (5) comprises to the treatment circuit of external analog video signal with to the demonstration and the output circuit of inner analog video signal, is respectively applied for to the conversion of external analog video signal with to the demonstration and the output of inner analog video signal.
Audio interface circuit (6) comprises to the treatment circuit of external simulated audio signal with to the broadcast and the output circuit of inner simulated audio signal, is respectively applied for to the conversion of external simulated audio signal with to the broadcast and the output of inner simulated audio signal.
Bus arbitration and control circuit (7) are used for arbitration and control to DSPCPU processing and control module XIO bus, to realize exchanges data and the control of DSPCPU processing and control module to keyboard, ethernet interface circuit.
Keyboard (8) is used for gathering the push button signalling of man-machine interaction, and sends this signal to the DSPCPU processing and control module.
Ethernet interface circuit (9) is used for receiving and sending network data, realizes the exchanges data between DSPCPU processing and control module and the IP-based Ethernet.
PSTN module (10) is used to handle from the reception data of PSTN interface circuit with from the transmission data of DSPCPU processing and control module, realizes exchanges data with the DSPCPU processing and control module by universal serial bus.
PSTN interface circuit (11) is used for the modulation to PSTN network telephone wire analog signals, is digital signal and digital signal is converted to can be in the defeated analog signal of phone line with analog signal conversion.
The applicating flow chart of the specific embodiment of the invention as shown in Figure 2.
Video telephone set in the accompanying drawing 2 is the present invention, and the network interface of its RJ45 links to each other with the broadband access netting twine plug of Netcom;
The RJ11 telephony interface of video telephone set inserts plug with the telephone wire of telecommunications and links to each other;
Many video telephone sets interconnect by Internet (Internet), realize multiple functions such as video call;
Many video telephone sets interconnect by PSTN (public switched telephone network), realize multiple functions such as video call or simple voice call.
The present invention has two kinds of mode of operations, i.e. the mode of operation of IP based network and based on the mode of operation of PSTN network, and two kinds of mode of operations can be switched mutually with a button, do following elaboration respectively with regard to two kinds of mode of operations below:
1, the mode of operation of IP based network:
RJ45 network interface on the video telephone set is connected netting twine, be communicated with, turn on the power switch, and mode of operation is switched to the IP network state with IP network;
One among target ip address by keyboard input the other side, target designation, the destination phone numbers three promptly can have been called out by " affirmation " key.
After video telephone set found target machine by network, video call had just been set up, and at this moment both sides just can carry out the real time bidirectional transmission of image and sound, and our LCD shows the other side's image, and the other side LCD shows we's image.
By there is multiple call mode to switch mutually by key control.Can see the other side's image under the privacy mode, and the other side can't see we's image; Picture-in-picture mode can show both sides' image simultaneously on LCD; Under silent mode, can make the other side can't hear your sound.
2, based on the mode of operation of PSTN network:
RJ11 telephone line interface on the video telephone set is connected telephone wire, with the PSTN network-in-dialing, turn on the power switch, and mode of operation is switched to the PSTN network state;
Under the PSTN network state, there are two kinds of call modes to select, i.e. general telephone mode and videophone mode, two kinds of patterns can be selected by menu operation.The working mechanism of these two kinds of patterns is different, and the number of transfering under the general telephone mode is fixed telephone number or Mobile Directory Number, and this is consistent with common base dial mode; Be to set up video call by the PSTN net under the videophone mode, this needs the support of the other side's phone, with the operation class of MODEM seemingly;
If the selection general telephone mode, dial mode is the same with common base dialing so;
If the selection videophone mode, dial mode is consistent with the mode of operation of IP based network so.
At last, it is also to be noted that what more than enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to above examples of implementation, many other execution modes can also be arranged.All other the execution mode that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (3)
1, the video telephone set of a kind of compatible PSTN and IP network, contain DSPCPU processing and control module, memory, video a/d and D/A, audio A/D and D/A, video interface circuit, audio interface circuit, bus arbitration and control circuit, keyboard, ethernet interface circuit, PSTN module, PSTN interface circuit, it is characterized in that described DSPCPU processing and control module is connected with control circuit, keyboard, ethernet interface circuit and PSTN module with D/A, bus arbitration with D/A, audio A/D with memory, video a/d respectively; Described video a/d is connected with video interface circuit with D/A; Described audio A/D is connected with audio interface circuit with D/A; Described PSTN module is connected with the PSTN interface circuit.
2, the video telephone set of compatible PSTN according to claim 1 and IP network, it is characterized in that, described DSPCPU processing and control module is connected by the data address control bus with memory, and the DSPCPU processing and control module is connected by the ITU656 bus with D/A with video a/d; The DSPCPU processing and control module is connected by the IIS bus with D/A with audio A/D; The DSPCPU processing and control module is connected by the XIO bus with control circuit, keyboard, ethernet interface circuit with bus arbitration; The DSPCPU processing and control module is connected by universal serial bus with the PSTN module.
3, the video telephone set of compatible PSTN according to claim 1 and IP network is characterized in that, described PSTN module is connected by analog signal line with the PSTN interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017257 CN1564594A (en) | 2004-03-25 | 2004-03-25 | Visual telephone compatible public telephone switched network with protocal network of internet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017257 CN1564594A (en) | 2004-03-25 | 2004-03-25 | Visual telephone compatible public telephone switched network with protocal network of internet |
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| CN1564594A true CN1564594A (en) | 2005-01-12 |
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| CN 200410017257 Pending CN1564594A (en) | 2004-03-25 | 2004-03-25 | Visual telephone compatible public telephone switched network with protocal network of internet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007003131A1 (en) * | 2005-07-04 | 2007-01-11 | Shenzhen Donjin Communication Tech Co., Ltd | An integrated telecom service system |
| CN101998000A (en) * | 2009-08-18 | 2011-03-30 | 米特尔网络公司 | Device and method for preventing ion buildup in liquid crystal displays |
| CN101465919B (en) * | 2007-12-19 | 2012-02-01 | 北京品视电子技术有限公司 | Method and system for implementing video conference |
| WO2012016441A1 (en) * | 2010-08-05 | 2012-02-09 | Cai Chunsheng | Desk telephone set and communication method thereof |
| CN105187590A (en) * | 2015-10-19 | 2015-12-23 | 重庆梅安森科技股份有限公司 | Broadcast telephone set |
-
2004
- 2004-03-25 CN CN 200410017257 patent/CN1564594A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007003131A1 (en) * | 2005-07-04 | 2007-01-11 | Shenzhen Donjin Communication Tech Co., Ltd | An integrated telecom service system |
| CN101465919B (en) * | 2007-12-19 | 2012-02-01 | 北京品视电子技术有限公司 | Method and system for implementing video conference |
| CN101998000A (en) * | 2009-08-18 | 2011-03-30 | 米特尔网络公司 | Device and method for preventing ion buildup in liquid crystal displays |
| WO2012016441A1 (en) * | 2010-08-05 | 2012-02-09 | Cai Chunsheng | Desk telephone set and communication method thereof |
| CN105187590A (en) * | 2015-10-19 | 2015-12-23 | 重庆梅安森科技股份有限公司 | Broadcast telephone set |
| CN105187590B (en) * | 2015-10-19 | 2019-03-22 | 重庆梅安森科技股份有限公司 | Broadcasting call machine |
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