CN2726229Y - Network medium telephone terminal - Google Patents

Abstract

The utility model discloses a network medium telephone terminal, which is provided with an IP telephone module making the called number map into the corresponding gateway IP address. The complete appliance is provided with a PIC bus and a main CPU; an Ethernet interface and a multimedia processing module supporting MPEG-4, vision audio coding process and A/V conversion for the streaming are arranged on the PIC bus; the multimedia processing module comprises a speech / multimedia processor and a DSP processing module; the speech / multimedia processor is connected the media port for sending the phone and the video signal through a D/A conversion; the I/O communication is realized under the coordination of the main CPU hardware and the operating system software; the communication is carried out based on the SIP communication protocol and the MPEG-4 streaming formats. The utility model supports the INTERENT roam and the PSTN inserting roam in the same account, having the telephone functions of extending and supporting the visual telephone and the multimedia functions of supporting on-line TV set, sound set, etc.

Description

Network media phone set terminal

Technical field

It is communication network that the utility model relates to a kind of, the unification of three nets information terminal of cable TV network and computer interconnected network, it also is fixed communication network, the unification of three nets information terminal of mobile communications network and digital TV network especially has network service dual-purpose terminal and the application and the method to set up of medium phone set terminal function.

Background technology

At present, still Each performs its own functions to enter " three nets " of family: telephone communication network (PSTN) is mainly used in by telephone set to be conversed.Cable television network is mainly used in by television set and watches the multichannel simulated television.The internet is mainly used in by computer internet browsing page and transmitting-receiving E-MAIL.Fast development along with broadband the Internet, be that the broadband access of representative begins to enter more and more many field and user's (comprising commercialization and domestic consumer) mainly by ADSL/LAN/Cable Modem, the new business application of broadband the Internet is indicating that also along with the expansion in market emerges in an endless stream the communication of family and amusement will have a great change.Disclose a kind of IP telephony system and communication means thereof as patent application 00132689, this system comprises calling terminal and called end, and calling terminal links to each other by IP network with called end; Calling terminal mainly is made of an above client terminal, call server and Calling Side gatekeeper; At least comprise client's application module, client's auxiliary processing module and voice communications module in this client terminal; Communicate by letter with voice communications module with client's auxiliary processing module.The main feature of this method is exactly: the call establishment of calling terminal replaces client terminal to finish by call server, so that this system's interoperability is better, safer, reliable, the terminal solution of this IP telephony system is compared relative complex with the program controlled telephone terminal, and business function is single relatively.Though complete machine structure and operating function improve to some extent in the recent period, be reduced to its utility function of IP network telephone set that inserts the internet as terminal and do not see expansion.

Cable TV is just from the transition of simulation-to-digital TV, but speed is slow, and by the end of the year 2003, the whole nation has 400,000 digital cable customers approximately, and the one thousandth that only accounts for 3.5 hundred million television sets in the whole nation is strong.Aspect the internet,,, still remain to be caught up with in content and application facet though the broadband the Internet development is very fast.And the main flow terminal of broadband the Internet, only be confined to PC at present.Its use must possess certain professional knowledge, is far from using telephone set, television set simple and convenient like that.This also is the obstacle that broadband the Internet is further popularized.

Traditional PSTN speech net based on TDM, though the business of 64kbit/s can be provided, professional and control is all finished by switch.Though this mature technology can guarantee voice communication good quality is arranged, providing of new business is restricted, in the face of the market of competing day by day seems unable to do what one wishes.Meanwhile, the increase of development of computer and computer interconnection demand, make the growing growth of IP-based Packet Switch Data Network, and the broadband networks of this packet switching is more suitable for the various types of information transmission of (comprising streaming media service), and utilization rate of network resource also obviously improves.

The user will use the service content of broadband streaming media just must use corresponding terminal device to come receiving stream media.At present, this type of terminal equipment mainly can be divided into two big classes: a class is the software terminal that the PC computer forms in conjunction with media play software; Another kind of is the multimedia terminal of being made by the dedicated hardware chip.The general terminal equipment that the former is powerful with it, realization simply becomes present support broadband streaming media business.But, more need to support broadband streaming media business by television set/sound equipment (comprising the camera in the growth) terminal that black phone mode of operation and benefit have been popularized along with the development of user's request.The latter's representative products set-top box is wherein a kind of equipment just, present domestic set-top box Development and Production industry the purpose of exploitation of various set-top box are users that contention is bad to use PC, but set-top box purpose of design and the function function setting that all do not comprise the traditional phone terminal operation.The purposes and the function difference degree of the product of the set-top box product in area and domestic set-top box Development and Production hardware mode that manufacturer adopts are less beyond the external and China's Mainland, poor expandability, also do not enter the domestic market on a large scale, the product of its performance and domestic-developed is basic identical, but it is generally higher to offer, thereby does not have tangible competitive advantage.Patent application 00129783 discloses a kind of set-top box, comprise: network interface unit, digital to analog converter, peripheral interface units, have memory and high speed processing chip DSP, described memory stores has mpeg decode software and cable modem software, this DSP is a parallel processing structure, by from memory, calling mpeg decode software or cable modem software respectively, in DSP, carry out corresponding data operation, realize with the one chip receiving digital television or possess the function of cable modem.Though the data handling procedure of the receiving digital television of described DSP or IP data can be carried out simultaneously, but this type of digital TV set-top box only supports the TV signal of the certain format that broadcast mode transmits to receive, can not show colourful image and video on the broadband the Internet

Develop and use the information resources of internet, realize that MMS (Multimedia Message Service) such as mutual/nonreciprocal digital video and data have become the urgent need of information age development, the audio/video on-demand service is exactly wherein a kind of interactive digital video information service.As the user side receiving equipment of audio/video on-demand system, the media termination of compatible existing television set and sound equipment will be developed rapidly, and might become the main flow of 10 years futures or longer time internal information consumption electronic product.The main flow of broadband the Internet applications should be multimedia audio-video service and amusement.On the other hand, the development of IP telephony technology and low conversation cost advantage make and get used to using the user of traditional PSTN voice service to begin to turn to the VOIP voice service, can estimate: thereupon will be that the extensive of broadband network telephone popularized and use.On the multimedia terminal, realize it being a very attracting thing as broadband streaming media service such as the networking telephone (VOIP), video request program (VOD), high definition television (HDTV), remote teaching, tele-medicines.Multimedia terminal---network media phone set terminal based on Session Initiation Protocol and Softswitch technology realization can cooperate to realize above-mentioned business with the broadband streaming media business application platform preferably.

Summary of the invention

The purpose of this utility model is, the very high conformity of business operation network flow-medium terminal of a kind of integrated level and network phone set terminal (integrate communicate by letter, video, data terminal) are provided, the integrated communication terminal function of multimedia services such as integrated speech communication, data, video, be a kind of new network media phone machine terminal simultaneously, the device of a kind of otherwise effective technique and content integration be provided for existing telephone terminal and television set terminal.

The purpose of this utility model also is: the function of IP phone and program-controlled telephone is provided on this commercial or home multimedia terminal that provides, can supports the conventional dial under IP address and the number translation; Extensive interface and peripheral hardware: support television set, sound equipment to insert, possess the network multimedia information online browse, mutual communication, program request download function; Can realize as the networking telephone (VOIP), video request program (VOD), online game, broadband streaming media service such as remote teaching, tele-medicine can also be provided.

The utility model purpose also is to provide a kind of multimedia terminal based on Session Initiation Protocol---and network media phone set terminal is connected with the broadband streaming media business application platform preferably to realize above-mentioned functions and business.And adopt IP to merge design and dsp software technology, make the terminal installation of network media phone set terminal have the function that more meets user and market.

The purpose of this utility model is achieved in that network media phone set terminal, be provided with SLIC phone module, other is provided with the IP phone module that the target called number is mapped as corresponding gateway ip address, be provided with pci bus, host CPU, on pci bus, be provided with Ethernet interface (PCI Tanget) and support Streaming Media MPEG-4 decoding, the A/D conversion, the multimedia processing module of video encoding, described multimedia processing module comprises voice/multimedia processor and DSP processing module, connect the TV signal port at described voice/multimedia processor by the D/A conversion, realization I/O communication under host CPU hardware and operating system software coordination communicates on the basis of SIP communications protocol and MPEG-4 stream media format.

External-connected port is: RJ11-PSTN access, RJ45-IP network insertion, AV/S-V support general television set port, dual track/multichannel sterego sound equipment port and the default port that is used to be connected PC.Make common double audio frequency phone function and realize based on the VOIP of IP-based switching's network and multi-media communication one.

Other is provided with the driving interface module---and support external PC, in-local system, preset function parameter are set

The utility model also is provided with extended function module:

Audio decoder, Streaming Media MPEG-4 coding are looked in multimedia processing module---A/D conversion, support

The AV interface module---support the peripheral hardware picture pick-up device to insert (video telephone function)

Usb interface module---support the peripheral hardware portable hard drive to insert (Streaming Media download function)

RF (simulation) receives the Processing Interface module---and support analog catv to receive, change the output of AV interface

RF (numeral) receives the Processing Interface module---and support satellite television to receive, change the multimedia processing module

RF (numeral) transmitting-receiving Processing Interface module---support that digital cable TV is mutual, change the multimedia processing module

Described DSP processing module comprises the CPCI plate based on dsp processor, PCI interlayer connector is arranged on the pci bus of plate, be the PMC groove, the DSP module is equipped with the serial line interface of Streaming Media processor, audio coder ﹠ decoder (codec), transmission tdm traffic, connects internal processes and data storage.Insert Ethernet chip, dsp chip group, IP-I/O integrated circuit board on the plate; Connecting pci bus and connector links to each other with telecommunications I/O interface with time division multiple access bus (TDM bus).

The processor of I/O interface comprises API multimedia driver.

Can also realize that the PSTN wide area network connects with PMC I/O card; Or be connected on the PSTN PCM/TDM data flow.

The DSP module has the C compiler and the debugging acid of optimization; Carry out the operation of the special sound encoder of fixed point;

The DSP primary processor is connected supports on local pci bus, main pci bus or certain the PMC card that LAN connects.

The IP phone module is provided with telephone signal tone generator and detector and echo canceller.

Phone module connects LCD.The PCI plate is provided with the MPEG-4 DST PLAYER.Carry out the VOIP communication, the MPEG-4 streaming media playing, simple dial-up operation interface and LCD incoming information show.

Plate upper reaches Media Processor has multiple choices, can be application specific processor, carries out the I/O protocol stack, handles grouped data and tdm data, carries out the LAN/WAN protocol stack, handles HDLC and manages DSP.

Can establish the USB mouth in addition, articulate the interface of hard disk, realize program storage.

The setting of network media phone set terminal be connected application process:

As mentioned above, by the dialing carrying out respectively of the network media phone set terminal PSTN or VOIP communication, the Softswitch technology communication Network Based of network media phone set terminal, in conjunction with IP phone machine terminal Integrated Solution, utilize TV as large-screen video display terminal (television field frame and sound equipment are appreciated terminal as audio frequency), magnanimity multimedia messages on the Internet is inserted television set (sound equipment) terminal, make phone set terminal+television set (sound equipment) terminal realize the mutual of multimedia messages by network, two interfaces are arranged between network media phone set terminal and the broadband streaming media application system, one is mutual by realization IP signaling between sip proxy server and the application server, thereby sets up the Session Initiation Protocol interface of medium streaming session; Another is in network media phone set terminal and broadband streaming media application system, the RTP media flow transmission interface of setting up between buffering area agency or the media server.Network media phone set terminal is mutual with media flow transmission interface and broadband streaming media application system by above-mentioned two IP signalings control, thereby on network media phone set terminal, realize the broadband streaming media business application---realize basic hardware and software feature (VOIP communication, the MPEG-4 streaming media playing, simple dial-up operation interface and LCD incoming information show); Network insertion part (10/100Mbp Ethernet interface) is supported by ICP/IP protocol storehouse, CODEC protocol stack software; And dsp processor, embedded type CPU are with embedded OS, application program support.

Lan protocol (TCP/IP) moves on primary processor or application specific processor.In wide area network was used, I/O conducted interviews to public phone network (PSTN) by TDM bus and telecommunications I/O interface.Tdm traffic is imported the DSP serial port again from the output of TSI interchanger.DSP selects suitable TDM time slot (channel) and carries out signal tone and detect to determine type of call.If audio call, encode after then the speech data of this time slot being eliminated echo, handle in real time, ether/IP/UDP packing, directly send to ethernet controller again.If the voice signal detector does not detect voice signal, then enable quiet inhibition.For the grouped data that receives by LAN, at first unpack and send to wobble buffer, send to Voice decoder then.If enabled quiet inhibition, just can generate flexible noise.Speech data is sent to time slot interchanger by the DSP serial data stream and exports through telecommunications I/O interface." embedded real-time multitask development system " is by ICP/IP protocol; The Session Initiation Protocol support performance.

Network media phone set terminal is defined as the Embedded Intelligent Terminal product based on DSP.The possibility of DSP subsystem has: fixed function chipset/kernel, general programmable CPU processing host or local signal and the DSP towards communication able to programme.

Network media phone set terminal will be designed to advance the practical flexible exchanging network intelligent terminal of unification of three nets application.Its business interface (Service Interfaces) comprising: the interface that application access network capabilities and information are provided.The service application that provides approach to make the user possesses the addressable network ability, as call manager, and message, mutual etc., business interface also comprises the common application interface of the application that alleviates communication application program.

The utility model framework interface (Framework Interfaces) provides the professional necessary external tenability that receives.By the framework interface support: based on the interactive operation of traditional calling mode; Insert for telephone terminal; Insert for television terminal; Insert for sound terminal.

The utility model network media phone set terminal connects supports general television set and sound equipment, the VOIP and the multimedia VOD one of program controlled telephone based on the PSTN network, IP-based switching's network are realized, are that a kind of cost performance, stability of the generation network application that faces down is high and meet the popular media terminal apparatus of traditional use habit most.

The utility model is supported SIP communications protocol and MPEG-4 stream media format, and the application location at existing network application and next generation network (NGN) can be described as:

---communication network, the unification of three nets information terminal of cable TV network and computer interconnected network

---by PSTN and PABX intercommunication

---by CATV-HFC/IP-LAN and front end intercommunication

---by Internet and WEB, WAP intercommunication

---fixed communication network, three net interconnecting information terminals of mobile communications network and digital TV network

---by Internet and Pc intercommunication, by PSTN and PABX intercommunication

---by 2.5G/3G mobile communications network and GSM, the intercommunication of CDMA mobile phone

---by digital TV network under IP world with the intercommunication of CATV front end

The utility model closes key combination: network media phone set terminal adopts the embedded system of at present up-to-date in the world class PC pattern, this system will exceed about 50% than existing embedded system on the performance, near the performance of common PC, providing powerful serviceability aspect the multimedia processing.The hardware technology of network media phone set terminal merges existing software engineering, supports by the IP call center's platform that comprises sip proxy server and application server:

(1) Softswitch technology: transmitting voip in IP network, realize that interaction of multimedia information and value-added service employing is international, the Session Initiation Protocol of domestic current standard.

(2) source coding technology:

Behind the analog signal digital, amount of information is increased sharply, and must adopt corresponding data compression standard.Adopt the MPEG-4 compression standard, be suitable for multiple definition picture quality.Two kinds of standards of audio frequency compatible AC-3-3 and MPEG-2.Source decoder adapts to the different coding strategy, correctly reduces original sound, video data.

(3) large scale integrated chip (LSI chip) technology:, adopt special chip, with CPU core and VOIP-DSP for realizing real-time demultiplexing and processing data information, MPEG-4 transmission flow demultiplexing device, the MPEG audio/video decoder, the NTSC/PAL encoder is integrated, forms the acp chip of STB.

(4) the link communication of upstream data: the interactive application under the Session Initiation Protocol, transmit upstream data by IP network.

(5) networking telephone: the core of network voip phone and key equipment are the IP phone gateways.The IP phone gateway has the routing management function, and it is mapped as corresponding gateway ip address to target called number.These information leave in the database, and relevant process software is finished functions such as call treatment, digital speech packing, routing management.When user's calling IP phone, the IP phone gateway is determined the IP address of respective gateway according to the area code database data, and with in this IP address adding IP packet, select best route simultaneously, to reduce propagation delay time, the IP packet arrives destination IP phone gateway through the internet.Area for the internet does not extend to or temporarily do not set up gateway can be provided with route, is transferred by long-distance network by nearest gateway, realizes communication service.Traditional IP network mainly is to be used for transmitting data service, employing be technology that do one's best, connectionless, therefore do not have service quality to guarantee, have situations such as packet loss, out-of-sequence arrival and delay variation.Data service is less demanding to this, but speech belongs to real time business, and sequential, time delay etc. is had strict requirement.Therefore must take special measure to ensure certain quality of service.The key technology of IP phone comprises: signaling technology, coding techniques, Real-time Transmission, service quality (QoS) assurance technology and network transmission technology etc.

(6) signaling technology

Signaling technology guarantees the smooth realization and the speech quality of call, and control signaling system adopts the IETF Session initiation protocol SIP of ITU-T.

SIP is a kind of fairly simple conversation initialized protocol.Session or call establishment and controlled function are provided.SIP had both supported single-point to send (Unicast) and had also supported the multiple spot transmission that session participation person and medium kind can add an already present meeting at any time.SIP can be used for called person or machinery equipment, as calls out meeting of a media storage device record, or calls out a video on demand server to the meeting broadcast video signal.

SIP is a kind of application layer protocol, can be with UDP or TCP as its host-host protocol.SIP is a kind of text based agreement, with the location language description (SIP Uniform Resource Locators) of SIP rule resource, is easy to like this realize and debugging, the more important thing is flexibility and favorable expandability.Because only doing in initialization, calls out SIP, rather than transmission of media data, thereby the additional transmitted cost that causes is also little.SIP also has the calling of foundation fast, supports to transmit the characteristics of telephone number

(7) coding techniques

The voice compression coding techniques is an important component part of IP telephony technology.At present, main coding techniques have the ITU-T definition G.729, G.723 (G.723.1) etc.Wherein G.729 can will be compressed to 8kbit/s with distortionless quality almost through the 64kbit/s of over-sampling speech.Owing in packet switching network, quality of service can not obtain fine assurance, thereby needs the coding of speech to have certain flexibility, i.e. the variable adaptability of code rate, coding yardstick.G.729 be originally the speech coding standard of 8kbit/s, present working range extends to 6.4～11.8kbit/s, and speech quality also has certain variation in this scope, even but 6.4kbit/s, speech quality thereby is well suited for using in VoIP system also well.G723.1 adopts 5.3/6.3Kbit/s dual rate speech coding, and its speech quality is good, but processing delay is bigger, and it is the speech coding algorithm of present standardized minimum speed limit.

(8) Real-time Transmission

Real-time Transmission mainly is to adopt realtime transmission protocol RTP.RTP provides the agreement of the real time data transmission that comprises audio frequency end to end.RTP comprises data and control two parts, and the latter is RTCP.RTP provides the mechanism of time tag and control different data streams synchronizing characteristics, can allow the packet of receiving terminal reorganization transmitting terminal, and the quality of service feedback of receiving terminal to multiple spot transmission group can be provided.

Characteristics of the present utility model are: for making the device reliability height, be easy to use, be convenient to popularize, the utility model network media phone set terminal terminal installation does not adopt the popular technique scheme of " medium computer ", does not adopt the man-machine machine interactive mode of the PC that needs professional knowledge to use.But the telephone terminal model that conforms to user's use habit, on LCD display, can demonstrate gateway address translation number by caller identification, the information that also can upload or pass is down carried out the interactive transmission of short message, has then reduced cost with the synthetic terminal of existing television set (sound equipment).

Network media phone set terminal can help to charge and management by binding gateway address translation telephone number.

The utility model Streaming Media phone set terminal is also protected the investment of user's existing telephone/broadband connections and television receiver as the start-up technique of IP-based switching, also be convenient to the popularization and the development of VOIP and Streaming Media type of service.

The utility model and digital TV set-top box also have very big difference.Digital Television only provides the TV signal of certain format, and transmits with broadcast mode, can not show colourful audio/video information on the broadband the Internet, particularly more and more many personalized multi-media service content such as VOD etc.But and the utility model the two take in concurrently, enlarged rating content and audio/video program to appreciate mode, allow spectators that more selection is arranged.

The utility model network media phone set terminal is except all operations function with program controlled telephone, support by IP call center: also be easy to realize enlarged the phone function of use of terminal such as SMS, MMS, video telephone, MPTY, tone information, VOICEMAIL, E-MAIL, information on demand, Music on Demand etc.

As mentioned above: the utility model network media phone set terminal is by expansion design, and external interface will be abundanter, can articulate hard disk realization program storage or the like by increasing being connected of the existing and digital camera/Digital Video of USB cause for gossip.

Network media phone set terminal is the end product of PSTN and broadband network, and function of the present utility model can be accomplished:

1. break through region service boundary fully, support INTERNET roaming and the same account PSTN of PSTN access roaming

2. compatible value-added service: support SMS, MMS, PUSH TO TALK, business developments such as VOICE-MAIL

3. be reduced to the dialing phone set terminal owing to user interface, general television set, then range of application can extensively be expanded:

---telephonic communication: configuration PSTN number, VOIP telephone communication (support NG and PSTN is two-way dial);

---the multi-medium data communication: with web site url (by the dialing translation), be provided at the spider lines recreation, recreation is downloaded and the network multimedia content program request, can the communication of adaptive network enabled video telephone.

The function of network media phone set terminal:

---the phone function: do not change the IP phone and the program-controlled telephone function of conventional dial custom, video telephone is supported in expansion

---multimedia function: online support television set, sound equipment (keyboard dialing interactive operation), expansion supports peripheral hardware to download

---NGN communications protocol: SIP;

---stream media format: support MPEG-4, MPEG compatible-2, MP3

---expansion is supported: analog catv receives, satellite television receives, digital cable TV is mutual

The network media phone set terminal of the utility model design has emphasized voice, data, Video Applications and ip voice smart phone simple, easy-to-use, integrated.It is integrated into multimedia communication function the system of a compact, merged the function of Internet gateway (comprising exchange and route) and network multimedia business (VOD), support visual telephone, and connect the interface that standard is provided for relevant peripheral hardware terminal, considered the function that present numerous autonomous device had, the communication network that exists in the reality, computer network and broadcasting and television network, unification of three nets are inexorable trends, and three nets merge on the transmission technology of backbone network.For the low cost of unification of three nets realizes providing a kind of not only economy but also the solution of expansion easily, network media phone set terminal is towards commercialization and domestic. applications, has friendly application interface, may partly substitute and begin the digital TV set-top box product and the VOIP networking telephone that come into the market at present, as function replacement product---the information terminal of home PC, or even commercial and family information gateway.Product with these characteristics is not seen appearance in the market as yet.Wherein many functions also need the support of CP, SP.Can predict that thus the release of this product not only can promote industry development, also can break and give birth to new service, play positive industry interlock effect.

From development trend, network media phone set terminal is integrated by chip, physically reduces volume, reduces cost, and improves performance.Cpu function strengthens, and memory span increases; MPEG-4 (comprising more advanced MPEG) decoder will support to decode the simultaneously program of a plurality of HDTV; Graphing capability develops into powerful 2D from strength to strength, the 3D graphics engine; The Session Initiation Protocol more perfect function can support High Speed I nternet to insert and network application.Because broadband the Internet is the maturation of transmission quality and Softswitch technology preferably, network media phone set terminal will be supported increasing service application: the user just can enjoy the IP phone that interconnects with PSTN by simple connection, video request program (VOD), music download (MP3), electronic program guides, pay-per-view are watched, data broadcasting, surfing on the net, teleshopping, interactive game, multinomial value-added service such as video telephone.This interactivity will greatly change the traditional approach that people make a phone call and see TV.

Finally network media phone set terminal may be further developed and become digital home gateway, digital devices such as network media phone set terminal and PC, printer, DVD player are coupled together, and link to each other with Internet by two-way modules, become multi-functional information household appliances terminal veritably.

The IP that network media phone set terminal product is adopted merges design and dsp software technology, has the formed product quality advantage of leading-edge functionality of employing and two aspects of the formed product price advantage of appropriate scale of operation.Professional usage space and the application scale effect brand-new along with network media phone set terminal strengthen, the complete machine cost and price will constantly descend, expectation future in two years, network media phone set terminal market will be comprehensively be that the user accepts, and commercial presence and domestic consumer's two general objective market fast developments.

Description of drawings

Fig. 1 is the utility model network media phone---based on the framework map of unification of three nets Terminal Design: the getting in touch of the internet of the Cable-IP.-Lan by RJ11 or the foundation of RJ45 port and PSTN or ADSL-Lan, CATV-HFC, reduced voice or radio frequency, HDTV (High-Definition Television) signal or stereophonic signals such as RF, V/SV, A again by the utility model device and delivered to phone, television set and sound equipment by the RJ11 port.

Fig. 2 is the utility model network media phone---network function is realized schematic diagram, in the flexible exchanging network by fixed network, comprise Media Gateway Controller (MediaGatewayController), application server (ApplicationServer), trunk network (TrunkGateway) pass, IAD (AccessGateway), SGW (SignalingGateway), media server (MediaServer) and media termination.

Fig. 3 is the utility model network media phone---a basic structure sketch

Fig. 4 is the utility model network media phone---typical VOIP communication process block diagram:

Fig. 5 is the utility model network media phone---a termination function spare structured flowchart

Fig. 6 is the utility model network media phone---used MPEG-4 functor structured flowchart

Fig. 7 is the utility model network media phone---an overall system functional block diagram

Fig. 8 is for the utility model network media phone---the mainboard structure connection diagram is a circuit diagram:

Fig. 9 is the utility model network media phone---network and port connection layout:

Embodiment

As shown in Figure 1 and Figure 2: wherein user's media termination requires to have very high intelligent, with traditional telephone set huge difference is arranged.IP terminal in the flexible exchanging network generally comprises: network insertion part (10/100Mbp Ethernet interface), ICP/IP protocol storehouse, CODEC protocol stack, dsp processor, embedded type CPU, embedded OS, application program etc.

At present provide the terminal of voice and video business to mainly contain two Terminal Types: sip terminal and terminal H.323 by broadband network.Sip terminal is exactly the terminal that adopts Session Initiation Protocol, and it should be a kind of terminal that faces the future; So H.323 terminal becomes a kind of video terminal in the soft exchanging system, reason is that present video terminal kind is fewer, therefore just requires soft switch to support H.323 terminal when formulating the standard of soft switch.In order to support H.323 terminal, soft switch just need be supported H.323 protocol architecture, in order to support a kind of terminal, needs the extra expense of soft switch.In addition, H.323 protocol architecture adopts TCP to transmit application layer protocol, and this Connection-oriented Protocol of TCP to transmit long message not as UDP flexible.So the SIP video terminal is supported in soft switch, can simplify the protocol suite of soft switch.

Call out when connecting, in order to determine type of service, for example be that common speech connects or video connects, soft switch need be opened the session data that encapsulates in the Session Initiation Protocol and be described a kind of consideration that (SDP) is used as chargeing, based on the broadband network soft switch the purpose of design of media termination be to realize to the business of user side and the support of application, it has defined independently interface of a cover technology, these interfaces have been stipulated method, incident, parameter and semanteme make application creator external user and inside can set up the chaining service relation.The application that the media termination system can be the based on network soft switch service of visit provides access, authentication, authorization function.Generalized calls control professional (GCCS), can be to use network function is provided, can allow use dynamically be the target service routing, also can be intelligent VOIP, ISUP (ISUP), H.323 reach application such as unified message, the visit approach of their required abilities that provides support.

Network media phone is being realized by the broadband ethernet network in the process of IP-based switching's business: carry out the VOIP communication, receiving digital television VOD program, deal with data is professional and finish the parsing of multiple application.Also support the structural design of streaming media service for network media phone.Information source is finished the two-stage coding at VOIP and VOD business respectively before entering IP network, and the one, the chnnel coding of transmission usefulness, another grade is that source encoding and all information sources of sound, vision signal is packaged into transport stream.Corresponding with central platform, receiving terminal network media phone at first extracts channel encoded signal from transport network layer, finishes the channel link; Next is the source coded signal of reduction compression, recovers original sound, video flowing, finishes communication, the parsing of data service and multiple application simultaneously.Powerful digital signal processing platform of the present utility model is to support complicated information processing: when determining hardware platform, two kinds of selections are often arranged.The one, adopt application-specific integrated circuit (ASIC) (ASIC), another kind is exactly to select comparatively general digital signal processor (DSP).Because the segmentation of the continuous enhancing of DSP performance and kind is with at different applications (the DSP product as company of Texas Instruments (TI) just has nearly ten hundreds of models of series), add software development environment flexibly, DSP has been widely used in information processing, communication, the consumption electronic product aspect.

On structural design, consider network media phone is defined as Embedded Intelligent Terminal product based on DSP.

Internet Streaming Media decoding scheme: MPEG-4 (MPEG compatible-1, MPEG-2, MP3), MPEG-7 also can.Can carry out the Internet communications protocol: SIP network media phone can be summarized from the following aspects:

(1) it is a powerful telephone terminal, can support basic service and other most supplementary service of present common POTS telephone terminal or mobile telephone terminal, function and the wide area mobile roamings on broadband IP network such as for example ring, playing RBT, busy tone, DTMF, caller identification, information transmission.

(2) in order to support broadband streaming media, it has codec functions, and particularly decoding function could be decoded to the Streaming Media that is received, thereby plays in real time.Owing to will consider that the performance of personal multi-media terminal does not generally all have PC powerful, thereby speed in order to guarantee to decode, a decoding function part can be finished by DSP (Digital Signal Processing) chip of specialty, for example integrated in network media phone can be to the decoding chip of MPEG4, MP3 etc.Except these professional decoding chips, network media phone is in order to support basic VOIP voice call, also must possess the encoding and decoding hardware dsp chip or the software kit of support voice coding (as G.711, G.729, algorithm G.723.1).

(3) Media Stream in order can buffer memory to play, network media phone possesses bigger memory space, in general, has the memory headroom of 32M at least.

(4) in order to move various protocol stacks and software kit, network media phone possesses the more powerful professional embedded type CPU of function ratio, and in order to manage various software and hardware resources effectively uniformly, is equipped with embedded OS in network media phone.

(5) network media phone possess support to look, audio playing apparatus (for example color television set/sound equipment) and the first-class interface of making a video recording.

(6) in order to support wideband transmit, network media phone is equipped with the Fast Ethernet interface, as the network interface of 100M or 1000M.

(7) in order to support the reception of Streaming Media, network media phone possesses basic ICP/IP protocol stack, and the RTP of transport stream medium is as RTP, RTCP, RTSP etc.Terminal be in order can to hold consultation with application server, thereby sets up session, also must support the SIP signaling control protocol.

The network media phone that possesses above-mentioned key element can be supported broadband streaming media business substantially.The terminal of this support broadband streaming media business can propose media play request to the broadband streaming media application system, the broadband streaming media application system is real-time transmitted to the request medium in the play buffer of personal multi-media terminal immediately, the decoding Play System of network media phone is again with the media data flow in buffering area decoding, looking, broadcasting on the audio playing apparatus then.

Streaming media service realization flow on the network media phone

Network media phone for realize between broadband streaming media business and the broadband streaming media application system alternately: it mainly comprises three phases: (1) HTTP authentication and service request stage; (2) the mutual stage is set up in media capability negotiation and session between network media phone and server; (3) RTSP control/RTP transmit stage.In this flow process, in order to emphasize mutual between network media phone and the broadband streaming media application system, thereby the interaction flow between inner each function server of broadband streaming media application system is ignored to some extent.

The utility model is worked under the support of following program structure:

Remove hardware, ground floor software provides operating system nucleus and various hardware drive program, second layer middleware is separated application software and the bottom software that depends on hardware, make to use not rely on concrete hardware platform, the 3rd layer of application software comprises the application and the instant application of downloading of user of this machine storage.

(1) hardware driving layer software: driver drives hardware capability, as the VOIP communication module, and radio-frequency (RF) demodulator, transmission demodulation multiplexer, A/V decoder, OSD, video encoder etc.

(2) real time operating system: different with PC operating system, the operating system in the network media phone adopts real time operating system (RTOS), can work in real-time environment, and can move in less memory headroom.Popular real time operating system has VxWorks, Psos, OS20, Windows CE etc. at present.These operating systems have his own strong points, and application is all arranged in set-top box.

(3) middleware: in the upper layer application of exploitation network media phone, can face following problem: real-time multi-task operating system, hardware platform principle details, industry standard, every inter-trade difficult problems such as numerous and diverse user interface and utility function.Middleware be network media phone application program and operating system, hardware platform between an intermediate layer embedding, define one group of application programming interfaces comparatively complete, standard, make application program be independent of operating system and hardware platform, thereby the exploitation that will use becomes simpler and more direct, makes the opening of product and portability stronger.It is made up of communication virtual machine, web browser, image and multi-media module etc. usually.Characteristics on the open business platform are Products Development and produce based on a business platform that open business platform provides independently operational mode for each link, and each link has the profit of self.Have only adopt open business platform could guarantee network media phone autgmentability, effective recovery that the assurance Development and Production is invested.

(4) upper application software: carry out the various service functions that service provider provides, as: IP phone, electronic program guides, video request program, data broadcasting and video telephone etc.Upper application software is independent of the hardware of STB, and it can be used for various STB hardware platforms, eliminates the dependence of application software to hardware.

In Fig. 3 structural representation:

ROM is used to deposit control program.RAM is used to deposit service data.VOIP speech coding decoding unit is finished the modulus of VOIP voice signal, and digital-to-analogue is changed and encoding and decoding.VOIP compress speech decompression module is finished compressed and decompressed (as G.723, G.729A wait) of speech data.Network Interface Module is finished the transmitting-receiving of ip voice data and the transmitting-receiving of pstn telephone.

Fig. 4 is a network media phone typical case VOIP communication process block diagram:

Network media phone carries out compressed encoding by voice compression algorithm to speech data to be handled, then these speech datas are packed by related protocols such as IP, through IP-based switching's network data packet transmission is arrived reception ground, again these VoPs are stringed together, after the decoding decompression processing, revert to original voice signal, thereby reach the purpose that transmits voice by IP network.IP telephony system becomes the analog signal conversion of plain old telephone computer can link the IP packet that the internet transmits, and also the IP packet of receiving is converted to the analog electrical signal of sound simultaneously.Handle through the conversion of IP telephony system and compression, each plain old telephone transmission rate takies 8～11kbit/s bandwidth approximately, and therefore when using transmission rate as the bandwidth of 64kbit/s equally with common telecommunications network, the IP phone number is original 5～8 times.

As shown in Figure 5: the utility model main hardware constitutes:

Host CPU is not only the main controller/monitor and the explorer of whole system, also wants monitoring, LAN and the user interface of treatment system level.In the application, require its processing signaling (SS7, H.323) or media gateway control protocol stack SIP.Other application requirements CPU operation speech recognition database and program.Single host CPU can not be finished so multi-functional.Can handle these protocol stacks and application with one or more subordinate CPU during design.

Fig. 6 system block diagram has provided the relation and the annexation of functional module: network media phone has functions such as voice, multimedia and data processing, need to carry out complicated DSP function and complicated procotol, it is the core of device, it must possess the structure based on DSP, to satisfy requirements such as fast processor, wideband bus and efficient operation system, masterly when such structure will make the specific design system configuration, the product of developing is novelty but also cheap not only, and risk is little.

The operation support environment is responsible for the execution of optimizer and is optimized main frame and I/O interface.The critical function that it comprises has: the framework that generates the multichannel telecommunications application program of optimizing for DSP; The generation of Data Position management automatically and thread associated with the data; When compiling, estimate demand to MIPS, memory and power; At run duration is that the multiple systems allocation plan that comprises many DSP designs provides support, and provides support for the transmission of message between DSP and main frame IOP; Support debugging and confirming performance; The telecommunications that customizes specific area is easily used.

Simultaneously, the software development environment of system comprises various protocols stack API, (these protocol stacks can move on host CPU under the real time operating system RTOS management or IOP).Below protocol stack layers, be the API of various veneer resources, comprise DSP, DSP I/O (as serial port and interruption), IOP, H.110TDM bus switch, HDLC option and I/O submodule.

The cpci bus usability analyses is also very crucial.TDM I/O data are transmitted by H.110 bus mostly, but in some applications, data may reach LAN, and at this moment LAN and related protocol thereof are handled and carried out on main frame.The peak value disposal ability of the load 50% of cpci bus is used to handle the LAN transceive data.

Network media phone also will be handled the multiple network agreement easily.Whether whether the network capabilities of network media phone efficiently depends on has the protocol hierarchy mapping structure.Suggestion is designed to handle class osi protocol stack with structure.Below be a suggestion roughly: lower level (first and second layer) realizes that with hardware (hdlc controller, Ethernet, I/O) and DSP the 3rd layer can be placed on IOP, and higher level realizes on host CPU.Reduce interlayer communication like this, shortened delay.

Fig. 7 is a multimedia treatment circuit block diagram among Fig. 6

1) MPEG-4 compression, video/audio are decoded, are mainly the MPEG-4 demultiplexing, are used for the speech compression/decompression module.And service integration earlier divides into groups numerical data, then with video data packets, audio data packet and auxiliary data Packet Multiplexing in single data flow.Present networks medium telephone set system uses MPEG-4 to transmit and flows video, audio frequency and data-signal are carried out demultiplexing, forms audio frequency PES grouped data and video PES grouped data, and directly gives the MPEG-4 decoder with the Voice ﹠ Video data and decode.MPEG-4 transmits stream and data flow by the decoding line data analysis of going forward side by side, with extraction respective audio PES data, video PES data, program specific information (PSI), information on services (SI) and private data.Audio frequency PES data and video PES data are by the output of A/V interface, and program specific information (PSI), information on services (SI) and private data then are stored in the external RAM, and these data are directly carried out accessing operation.

The data that demultiplexing module is sent are video PES data and audio frequency PES data of compression, must be decompressed to the PES data by the MPEG-4 decoder.After grouping was decoded to the PES that sends, it exported two groups of signals, and one group is the digital video signal of giving digital video code, and another group is the digital audio and video signals of the PCM form of giving audio frequency DAC.

2) video coding

Video encoder is converted to analog signal with decoded digital signal, it receives the digital video signal that the MPEG-4 decoder is sent, simultaneously it is converted to mixed video signal or S terminal vision signal, these signals are through after the low-pass filtering, restore simulation sound, vision signal, on conventional color television set, show high quality graphic, and multichannel sterego is provided.

3) audio coding, audio frequency DAC

The function of audio frequency DAC is that decoded digital pcm data transaction is become three-dimensional acoustic simulation signal.Audio frequency DAC produces the over-sampling clock simultaneously, offers the MPEG-4 decoder as the reference clock, to produce accurate audio system clock.As shown in Figure 8:

Represent with the most frequently used mark.Comprise among the figure that phone SLIC module, compression, decompression, codec are the modules of IP phone, telephone audio compressed, decompress that ROM, RAM are the memories of setting up.

MpegTS is the inside code stream of mpeg module, and mpeg module is carried out function distinguishing, and 3TS is the video capability module, and IDE Video processing and output buffers interface module can connect output interface.MPEG/AV.Enc MEPG/AVDEC is respectively the MPEG coding/decoding module, DSP and DAC are digital signal processing module and the audio frequency and the video encoding module of core, the TBC time base corrector leaves in the shadow memory after with signal of video signal (AV or S terminal) digitlization, image Lose goes out terminal and sends standard and stable signal, even input signal interrupts, TBC also can continue to send stable synchronizing signal by the shadow memory of inside.PCI Tanget port is connected on the PCI BUS bus, PCI MASTER, Sapphire are the outer connector of bus, Trans Coding represents the output of stream media code stream, and IEEE-PHY is the shooting data-converting block, and the DVCodec module is to be used for the IP phone module as prior art.Also comprise the Sapphire display device among the figure, telephone set module pci bus, dsp chip constitutes from DAC exports audio frequency and video port etc.

Chip that Fig. 8 circuit is used such as information terminal process chip:

Bo Lisi company; POCKET IX 1.0 and POCKET IX 1.5

Motorola Inc.: 32 embedded high integration Coldfire5272 processors

AM General instrument company: DCT3000/DCT5000/ Texas Instruments (TI): TMS320DSC24 DSP

Taiwan Silicon Integration Systems Corp.(SIS) science and technology: SiS550 product line

STMicroelectronics Ltd. (ST Microelectronics Ltd.): STPC chip

The MPEG-4 multimedia processor can be:

American TI Company: C55x or C6000 or DSC2x

Japan NEC Corporation: UPD6113XA, UPD61151/61152, UPD72891/72892

U.S. Vweb company: LSI " VW2005 "/U.S. Sigma Designs company: LSI " EM8475 "

U.S. Sigma Designs company: EM8500

U.S. ViVoDa Communications company: VDC-601 MPEG-4/H.26x monolithic Video Codec

The VOIP process chip can be:

U.S. Broadcom company: BCM1113R or CM1115R

American TI Company: based on the TNETV2510 of TMS320C55x DSP

U.S. Virata company: Azurite VoIP chipset

The U.S. PROSYS SOLUTIONS (MIPS Technologies) of lotus merchant: the INCA-IP chip of integrating hardware-accelerated type encryption function

Winbond electronics and TigerJet Network company: W681511 CODEC chip and Tiger560 VoIP processor

Circuit of the present utility model is realized entrusting Specialty Design and the corresponding software development of carrying out mainboard, chip as IT product manufacturing companies such as platform SOLTEX, Asus, all can obtain the circuit embodiments of Fig. 8.It is worthy of note, integrated approach to Fig. 8: what emphasize is functional module (large scale integrated circuit mainboard) Integrated Solution, comprise: the DSP hardware under the CPU control adds embedded computer software, integrated combination is decided with the function design, each functional module (large scale integrated circuit mainboard) is according to the difference in functionality interface configuration of network media phone, and the utility model only proposes structural diagram and the Integrated Solution explanation just can entrust above-mentioned company to obtain satisfactory circuit board of the ratio of performance to price and complete machine.

The network media phone of the utility model design can as system controller, adopt Windows NT operating system with the Pentium cpu chip based on the CPCI structure.Except main pci bus, system also has H.110 bus, transmission TDM.For finishing the exchange of TDM information flow, must use H.110 bus.The predecessor of H.110 bus is multi-vendor integrated agreement (MVIP) and signal computing system architecture (SCSA), and the cable that normally is used for communication between plate connects, rather than core bus.TDM uses different time slot voice-bearer channels.Other functions such as telecommunications I/O and user I/O provide the telecommunications I/O interface function of non-bus-type by cpci bus, and are used for the proprietary bus user I/O of Ethernet.

DSP is based on the CPCI plate of dsp processor.PCI interlayer connector (PMC) groove is arranged on the pci bus of these plates, can insert Ethernet, dsp chip group, IP-I/O or other user and make integrated circuit board by oneself.Except that connecting pci bus, these connectors also can link to each other with telecommunications I/O interface with the TDM bus.

Processor on the plate is that special-purpose i960 handles grouped data and tdm data, carries out the LAN/WAN protocol stack, handles HDLC and manages DSP.This class I/O protocol stack can not be carried out by CPU mostly, because its program is big and needs real-time processing to a certain degree.Use DSP instead and carry out this class method, remove and to consume the DSP resource, also need a large amount of software transplantings, test, examination and integrated.

This structure can support specific LAN to connect on the local pci bus of primary processor, main pci bus or certain PMC card.Lan protocol (TCP/IP) can move on primary processor or i960 processor.In wide area network was used, main I/O conducted interviews to public phone network (PSTN) by TDM bus and telecommunications I/O interface.Realize that with PMC I/O card the PSTN wide area network connects.Be connected on the PSTN PCM/TDM data flow.

The DSP subsystem is the most concentrated part of processor in the network media phone, comprises speech coder, telephone signal tone generator and detector and echo canceller.The possibility of DSP subsystem has: fixed function chipset/kernel, general programmable CPU processing host or local signal and the DSP towards communication able to programme.Programmable DSP is only selection.Select according to comprising cost of material, flexibility, development cost and power consumption.

Correctly selecting DSP and plate structure for use is successfully to design high density, the key of gateway cheaply.DSP must be able to carry out the operation of the special sound encoder of fixed point; Be equipped with the serial line interface of transmission tdm traffic; Be equipped with internal processes and data storage; Low in energy consumption; And the C compiler and the debugging acid of optimization arranged.

Also should consider rear portion modular converter (RTM) during designing board, it moves to the system rear portion with all cables and external interface, and hot-swap ability and high reliability are provided.The effect of RTM comprises: as control board or the hot-swap controller in two redundant CPU designs; Perhaps prolong pci bus by the bridge that increases a PCI to PCI.

Tdm traffic is imported the DSP serial port again from the output of TSI interchanger.DSP selects suitable TDM time slot (channel) and carries out signal tone and detect to determine type of call.If audio call, encode after then the speech data of this time slot being eliminated echo, handle in real time, ether/IP/UDP packing, directly send to ethernet controller again.If the voice signal detector does not detect voice signal, then enable quiet inhibition.For the grouped data that receives by LAN, at first unpack and send to wobble buffer, send to Voice decoder then.If enabled quiet inhibition, just can generate flexible noise.Speech data is sent to time slot interchanger by the DSP serial data stream and exports through telecommunications I/O interface.

The real time data stream that programmed process is so complicated, software must be well-designed.Obvious delay in the software design of inefficiency, coding and optimization and the duplex voice transmission in real time all can make system use.The key point of dsp software comprises DSP kernel, IOP and local driver and application interface.

Different with the general calculation machine, dsp processor does not use common operating system, but writes small-sized kernel program supporting signal processing module.Below be the necessary characteristic of kernel: 1.I/O: the buffering of TDM efficiently and the grouping of prepackage; The low packet voice wobble buffer that postpones.2. multichannel thread: efficiently generate the multichannel thread, handle the trigger event that TDM buffering, network data packets etc. produce easily.3. debugging and analysis: the useful means that are the exploitation complex embedded system.4. memory services: the memory headroom of dsp chip is of great value, the use that the Memory Allocation service can optimize storage.5. kernel must provide programmed method and programming tool, uses so that develop many algorithms, the multichannel communication of optimization fast.

The multimedia processing subsystem

To multi-medium data compression and decompression technology is key technology in the network media telephone set system, network media phone adopts the standard of DVD, utilize the audio coding technology of MPEG-4 that sound is compressed to original sixth, utilize in the frame again and the interframe dynamic image compression technique, make the resolution of image reach the quality of DVD.

The operation principle of MPEG-4 is by the video/audio decoding accelerator, base, dram controller and moderator, pci bus/host register were formed when video/audio was synchronous.

The MPEG-4 theory diagram as shown in Figure 6

MPEG-4 video/audio decoding chip.Read the mpeg data stream signal of serial and other control signal, pass through the mpeg audio decoder, solve stereosonic audio signal, pass through the A/D converter again, output to sound equipment design or domestic television set by processor.Another road mpeg video stream forms composite video signal through Video Decoder, video d/a converter, NTSC/PAL encoder and delivers to domestic television set.Other also has control signal, can receive the various control commands that network media phone sends by keyboard.

The integration of system

1) network interface and user interface

Network interface is connected to network media phone on the broadband ethernet network, handles the related network agreement, receives input stream, and turns back to user's control commands.For broadband ethernet, then network interface can merge to the chnnel coding part, transmits subscriber control information with the VOIP channel.Safety management can be finished by VOIP caller authentication by a VOIP dialing cipher authentication form.

User interface mainly is made up of single chip machine controlling circuit, display circuit, remote control circuit.After the start of network media phone, at first will start the VOIP connection, support the dialup ip address translation communication of VOIP, simultaneously after dialing and connecting the appointment VOIP number of joining (IP address), the receiving center platform control system sends pre-selection of programs information, and shows on the IVR of VOIP or external tv machine with the form of program guide.The user can select program guide by VOIP voice suggestion or user's television interface screen, and selects by the dial mode request program according to the hobby of oneself.User interface is then given the CPU of the network media phone selection information, and does corresponding IP connection and playing programs processing.

2) peripheral unit control system

The peripheral unit control subsystem can be connected to multiple function expanding peripherals on the network media phone user.Wherein the most basic Peripheral Interface will be an infrared interface.Network media phone also can provide more interface simultaneously, as: game paddle, keyboard, mouse and printer, disc driver, CD-ROM etc.

3) network media phone is the information household appliances that need complex software to support, in fact it is exactly the microcomputer system of a complexity, so operating system is absolutely necessary.The structure of the The software level type of network media phone, its advantage is to make the hardware of bottom transparent to upper layer software (applications), increase or need not revise the software on upper strata when replacing hardware, needn't understand the structure of hardware when upper layer software (applications) is revised, upgrade like this and expand very convenient.

Software part runs on the network media phone target hardware, and they are respectively operating system and application code.But these two parts can generate executive software through connecting, and claim executable image again, and it is downloaded on the network media phone, just finish the software construction work of network media phone.

Digital Television VOD uses: the master-plan of network media phone VOD function can be adopted the similar standard with DVD, and source encoding adopts the MPEG-4 standard, and what service integration adopted is mpeg system layer standard, and the IP communications protocol then adopts the SIP standard agreement.During specific implementation, after the user selects program according to VOIP voice and television video main menu, network media phone is sent to the central control system platform by VOIP dialing with user's program request information, and the central control system platform sends corresponding program according to user request information to IP network.Network media phone receives the signal on the IP network, finishes the function of IP link, channel-decoding, demultiplexing, decompression, video coding and audio frequency DAC, and the video/audio output signal is delivered to television set, thereby realizes interactive video/data message service.Its course of work is: in client, the user uplink signal instruction sends communication call in dialup ip address translation mode by network by network media phone, sends request through IP network to video server.Arrive the also network interface card reception of serviced device, send server to.Through after the requests verification, server is ready to addressable program names in the storage subsystem, and on user VOIP phone and video screen the play-on-demand list.After the user selected program, server took out programme content synthetic video data flow from storage subsystem, was sent to the customer terminal network media phone with the MPEG-4 compress mode and play on television set by IP network.

Network media phone should be handled TDM information also can process IP information.In the design of network media phone, H.110 bus provides TDM service, and the submodule of LAN interface on the subordinate CPU and DSP provides IP interface service (IP also can transmit by cpci bus).DSP must have the ability of dynamic process voice/modulation data, thereby saves the cost of code conversion and multitasking.

The effect of network media phone is and other gateway communication therefore, must to design according to the requirement of standard aspect signaling, compression and the IP form.

Shown in Figure 9: connection of the present utility model: this device is got in touch by the WAP foundation of IP call center's platform and GSM/CDMA through Internet; Get in touch through Internet and WEB, and set up contact by Cable-IP.Lan and the Digital Television Broadcast Control front end (WEB) of CATV-HFC.

The functional configuration of network media phone:

---the phone function: do not change the IP phone and the program-controlled telephone function of conventional dial custom, video telephone is supported in expansion

---multimedia function: online support television set, sound equipment (keyboard dialing interactive operation), expansion supports peripheral hardware to download

---communications protocol: SIP; Stream media format: support MPEG-4, MPEG compatible-2, MP3

---expansion is supported: analog catv receives, satellite television receives, digital cable TV is mutual

According to above design function, the corresponding function block configuration of network media phone is as follows:

Basic function module:

I/O communication kernel under host CPU hardware and operating system software coordination

SLIC phone module---support program controlled telephone communication and operating function

IP phone module---support VOIP communication and IP address/number interpretative function

The multimedia processing module---support Streaming Media MPEG-4 decoding, A/D conversion, video encoding

Network Interface Module---support ethernet signal to insert

The driving interface module---support external PC, in-local system, preset function parameter extended function module are set:

Audio decoder, Streaming Media MPEG-4 coding are looked in multimedia processing module---A/D conversion, support

The AV/USB interface module---support the peripheral hardware picture pick-up device to insert (video telephone function)

Usb interface module---support the peripheral hardware portable hard drive to insert (Streaming Media download function)

RF (simulation) receives the Processing Interface module---and support analog catv to receive, change the output of AV interface

RF (numeral) receives the Processing Interface module---and support satellite television to receive, change the multimedia processing module

RF (numeral) transmitting-receiving Processing Interface module---support that digital cable TV is mutual, change the multimedia processing module

The configuration of this machine frame:

Bus configuration, the embedded computer operation system of software

Primary module is handled in the I/O communication

DSP functional processing module collection

DC built-in power module, the hands-free loudspeaker of phone, microphone

This machine configuration: the dial-up operation keyboard, wired handle or do not have tape dial-up operation keyboard handle (optional) LCD display,

External stabilized voltage power supply: AC changes DC

The utility model master-plan index:

Support Session Initiation Protocol soft switch communication

Support ADSL/LAN/Cable Modem broadband access;

Support the MPEG-4 consensus standard, compatible MPEG-I and MPEG-II video format and the MP3 audio format supported.

Support NTSC and PAL television system;

Support code stream; 52Kbps---2000Kbps; CBR or VBR;

Video resolution: Full D1 720*576 or 640*480;

Support the stereo output of 5.1 sound channel digital formulas

Support HTTP 1.0, HTML 3.2 and HTML 4.0, cookie, JavaScript 1.3, SSL3.0;

Support BMP, GIF87a, GIF89a (animated GIF), JPG picture format;

Support two kinds of big small fonts;

Support simplified form of Chinese Character, English;

Media server is acted on behalf of in support;

Screen amplifies and dwindles, and supports two kinds of display modes: 640 * 480 and 800 * 600;

Video resolution: Full D1 720*576 or 640*480;

Support code stream: 52Kbps---2000Kbps; CBR or VBR;

Support Windows Media DRM digital copyright management;

The support html web page is browsed;

Support SSL, NTLM, Kerberos safety certification;

Support CDN broadband content distributing network;

Support Session Initiation Protocol VOIP communication

Network enabled message sink (text MAIL, MS, FAX; PUSH/PULL information etc.)

The back-up system online upgrading obtains latest edition software on network;

Play Control etc. is supported in the dialing keyboard operation

Dial and receive

Keyboard dialing is controlled mutual uplink information, supports IVR, and the TV screen shows operation guide;

The treated output of Streaming Media signal: directly connect television set or home theater (sound equipment);

Hang up/volume regulates/redials/suspends/caller identification;

Can get, also can squeeze into, under the support of operator, dial landline telephone/mobile phone;

Other VOIP phones in both can having knitted a net also can be beaten any plain old telephone (supporting that VOIP/PSTN interconnects);

Under the support of operator, dial IP call center's platform, carry out the Streaming Media communication.

Preset specific function

Telephone directory/communication record/absence recording function/videoconference/updating client program, download ring and dialing tone.

The utility model art designs index:

Standard and agreement

G.711A-law﹠amp; μ-law, GSM6.10, voice coding/decoding algorithms/TCP/IP G.729; Meet SIP standard MPEG-4 consensus standard.

Ethernet interface---RJ45 connector meets IEEE 802.3 10 Base-T

Telephone network interface---RJ11 connector meets the PSTN standard

Dialing keyboard-except that 0-9, the * of standard, #, other is provided with 12 function keys, is used for operation and phone is set

Video formats---automatically/NTSC/PAL

Acoustic frequency response---20Hz-20KHz

Audio frequency signal to noise ratio---＞90db

Analogue audio frequency output---1-2V

Digital audio output---0.5Vp-p

Video output---1Vp-p; Load impedance: 75 ohm of non-equilibrium negative polarity

S terminal output---brightness Y:0.7Vp-p; Chrominance C: 0.88Vp-p; Load impedance: 75 ohm

Aberration output: 740-140m Vp-p

Status indicator lamp---be provided with indicator light and LCD illuminating lamp, be used for the LCD display lighting.

Hand-free function---full duplex, ringer volume, Headphone volume, the digital independent regulation of speaker volume

AC/DC adapter-input 220～240V (China, Europe etc.) or 100～240V (global voltage adaptive), 47-63Hz/ can login to specifying soft-switch platform/can seek soft-switch platform/support DHCP automatically: automatic IP address allocation, subnet mask, gateway ip address etc./support PPPoE

Silence detection; Comfort noise produces; The 16ms echo cancelltion

Dynamic buffer management--reduce time-delay, shake influence speech quality

Environment for use

Serviceability temperature: 50 ℃ of 0 ℃ of to (32 ° to 122)

Storage temperature: 65 ℃ of-30 ℃ of to (22 to 149)

Humidity: 10 to, 90% no dewfall

Power supply: 220V, 50Hz

Network: Ethernet---LAN, DSL, Cable-Modern

Network delay: less than 400ms

Network jitter: less than 100ms

Network packet loss rate: less than 10%

The network bandwidth: VOIP is greater than 30kbps, and VOD is greater than 256kbps

Phone: controlled network---PSTN

Household electrical appliances: television set, sound equipment

Operation interface

This machine dial-up operation keyboard, LCD display (text message menu), this machine microphone (voice messaging menu)

External tv machine (electronic program information guide)

Driving interface (the in-local program is set)

Basic interface

Ethernet interface RJ-45---connect LAN, DSL, Cable-Modern

Telephone network interface RJ-11---connect PSTN

Analog audio-video AV---the television set of connecting band AV

Composite video S-V---the television set of connecting band S-video terminal

The television set of color difference components YUV---connecting band Y, Pb/Cb, Pr/Cr socket

5.1 stereo AC-3---connect stero set or home theater

This machine is provided with interface COM---can the phone parameter be set by the PC browser

Expansion interface

Peripheral Interface USB---connect portable hard drive (or moving CD)

Peripheral Interface AV or USB---connect plug-in video camera or digital camera system

Input interface RF---connect analog catv, digital cable TV or satellite television equipment

Claims (10)

1, network media phone set terminal is provided with SLIC phone module, it is characterized in that being provided with in addition the IP phone module that the target called number is mapped as corresponding gateway ip address, and the IP phone module is provided with telephone signal tone generator and detector and echo canceller; Complete machine is provided with pci bus, host CPU, is provided with Ethernet interface on pci bus, with the MPEG-4 decoding of supporting Streaming Media, the multimedia processing module that video encoding is handled, A/D changes, described multimedia processing module comprises voice/multimedia processor and DSP processing module, is connected phone and video/audio signal media port at described voice/multimedia processor by the D/A conversion, realization I/O communication under host CPU hardware and operating system software coordination communicates on the basis of SIP communications protocol and MPEG-4 stream media format.

2, by the described network media phone set terminal of claim 1, it is characterized in that described DSP processing module comprises the CPCI plate based on dsp processor, PCI interlayer connector is arranged on the pci bus of plate, it is the PMC groove, be equipped with the serial line interface of Streaming Media processor, audio coder ﹠ decoder (codec), transmission tdm traffic on the DSP module, connect internal processes and data storage.

3,, it is characterized in that inserting on the described CPCI plate voice/multimedia processor and DSP processing module on the pci bus, i.e. Ethernet chip, dsp chip group, IP-I/O integrated circuit board by the described network media phone set terminal of claim 1; Connecting pci bus and connecting the time division multiple access bus is that the TDM bus links to each other with the I/O interface.

4, by the described network media phone set terminal of claim 1, it is characterized in that being provided with PMC I/O card, realize being connected with the PSTN wide area network; Or be connected on the PSTN PCM/TDM data flow.

5,, it is characterized in that the DSP primary processor of DSP module is connected on the PMC card of local pci bus or support LAN connection by claim 1 or 2 described network media phone set terminals.

6,, it is characterized in that being provided with in addition default driving interface module by the described network media phone set terminal of claim 1---support external PC that in-local systemic-function parameter is set.

7, by the described network media phone set terminal of claim 1, it is characterized in that external-connected port is: be provided with the RJ11 port and insert PSTN, RJ45 port and insert that IP network, AV/S-V port insert the common simulation television set, the stereophony port inserts family expenses sound equipment and the default port that is used to be connected PC, common double audio frequency phone function and VOIP and multi-media communication one based on IP-based switching's network are realized.

8, by the described network media phone set terminal of claim 1, it is characterized in that can expand external-connected port is: color difference components lead-out terminal (Y, Pb/Cb, Pr/Ct) access high definition analog/digital TV machine and 5.1 sound channel surround sound lead-out terminals access advanced audio and home theater.

9, by the described network media phone set terminal of claim 1, it is characterized in that being provided with in addition extended function module: be provided with the RF radio frequency analog and receive the reception of Processing Interface module connection analog catv, and change the output of AV interface; Be provided with the RF radio-frequency (RF) digital and receive the Processing Interface module---connect satellite television and receive, change the multimedia processing module; Be provided with RF digital transmitting and receiving Processing Interface module---it is mutual to connect digital cable TV, changes the multimedia processor port.

10, by the described network media phone set terminal of claim 1, it is characterized in that establishing in addition extended function module: be provided with multimedia and handle AV interface module or usb interface module access peripheral hardware analog/digital picture pick-up device; Usb interface module---insert peripheral hardware portable hard drive or moving CD.

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