CN2631160Y - IP visual telephone set with hand-writing input device - Google Patents

Abstract

The utility model discloses an IP visual telephone with a handwriting input device, includes an ultrasonic handwriting pen, a videophone and an ultrasonic receiving and processing part which is connected with the videophone, with remote discussing whiteboard. The ultrasonic handwriting pen used for handwriting input, includes a pen type housing, a printed circuit and a power supply arranged on the outside of the housing; the ultrasonic receiving and processing part is used for receiving ultrasonic and thereafter processing, the circuit module includes an ultrasonic receiving module, an ultrasonic detecting and amplifying module, an internal coding module and an interface module; the videophone includes an IP network interface part, a main circuit part, a camera part, a display part and a keyboard; the keyboard is added with a video/writing display switch key, a discussing whiteboard key, a preservation key, a turn-page key and a multiparty communication key; the main circuit part receives the data transferred from the ultrasonic receiving and processing part through USB or RS232 serial port.

Description

The IP video telephone set of band hand input device

Technical field the utility model belongs to a kind of communication terminal device, particularly a kind of IP video telephone set with hand input device.This IP video telephone has IP Visual communications, ultrasonic wave location handwriting input, three functions of remote white boarding discussion simultaneously.

Background technology is along with the continuous development of technology, and video telephone set, IP stand alone type video telephone set occur successively, have satisfied the increasing demand of people.However, under the growing situation of people's demand, IP stand alone type video telephone still manifests the place of its deficiency gradually.On the one hand, its form of service only rests on the conferencing over ip type and uses, and according to the viewpoint of telecommunications, this is also far from universal service, and is that all right is general IP face-to-face communication business; On the other hand, also be more prior, it can not possess the remote white boarding of finishing discussion simultaneously.Now, long-distance education and networking office are popular day by day, and existing IP stand alone type video telephone set can not satisfy people's demand.

The summary of the invention the technical problems to be solved in the utility model is for existing IP video telephone set increases remote white boarding function to be discussed, to satisfy demands such as long-distance education and office.

For increasing remote white boarding for existing IP video telephone set function is discussed, the utility model has adopted following technical scheme:

On the basis of existing IP video telephone set, aspect hardware device, increased ultrasonic wave writing pen and ultrasonic wave receiving and processing device, also existing IP video telephone set has been carried out following change simultaneously:

(1) some function buttons such as the video on the key board/hand-written display switching key, blank discussion key, preservation key, page turning key, multi-party communication key have been increased;

(2) increased USB interface or/and the RS232 serial ports.

For finishing the function of what's new button on the dialing keyboard, IP video telephone main frame of the present utility model is also different with existing IP video telephone set aspect internal circuit and software.

The feature of ultrasonic wave writing pen is to launch ultrasonic wave with ultrasonic transducer.The ultrasonic wave writing pen by form of a stroke or a combination of strokes shell, place printed circuit and power supply in the shell to constitute.On near the shell the nib, be provided with the ultrasonic wave launch hole.Printed circuit is made up of ultrasonic transmit circuit and ultrasonic wave transducer emission.Ultrasonic transmit circuit and ultrasonic wave transducer emission composition are finished the ultrasonic wave emission function.During work, borrow and press the nib action, connect ultrasonic transmit circuit, ultrasonic wave penetrates from the ultrasonic wave launch hole.

The ultrasonic wave receiving and processing device is measured their cross-reference time by detecting ultrasonic wave and hyperacoustic reflected wave, orients ultrasonic wave writing pen pen tip position as calculated.The feature of ultrasonic wave receiving and processing device is that ultrasonic transducer receives the information that detection ultrasonic wave writing pen is sent, and carries out data processing and conversion, outwards sends data by certain data format.

The circuit module of ultrasonic wave receiving and processing device comprises following components:

(1) ultrasonic wave receiver module;

(2) ultrasound examination amplification module;

(3) internal proprietary operator block;

(4) in-line coding module;

(5) interface module.

Wherein, the ultrasonic wave receiver module is made of ultrasonic transducer, and a ultrasonic wave receiving and processing device comprises two ultrasonic transducers separated by a distance at least.Ultrasonic wave receiver module two-way at least receives ultrasonic wave writing pen ultrasonic waves transmitted signal, is translated into the signal of telecommunication, and gives the ultrasound examination amplification module with it.The ultrasound examination amplification module receives the signal of telecommunication that the ultrasonic wave receiver module is sent here, it is amplified, by two reference time values that draw based on reference timing principle of internal control circuit output.The internal proprietary operator block quantizes the reference time value, finishes the calculating of pen tip position coordinate figure fast.The in-line coding module is responsible for the pen tip position coordinate figure is encoded according to the coded data form, gives interface module.Interface module is realized being connected between ultrasonic wave receiving and processing device and the main station by USB or RS232 serial ports.If select microprocessor self-carried USB or RS232 serial interface signal pins, then interface module can be incorporated the in-line coding module into.The ultrasonic wave receiving and processing device also can not comprise the internal proprietary operator block, handles and give the external arithmetic device with this partial arithmetic, as finishing calculating by the main station innernal CPU.At this moment, the coded object of in-line coding module no longer is the pen tip position coordinate figure, but the reference time value.

The same with existing IP video telephone set, IP video telephone host hardware of the present utility model system comprises parts such as IP network interface unit (NIU), main circuit unit, image unit, display unit, key board.NIU is the pith that set-top box and network communicate, and it connects the external IP network through the RJ45 interface, is connected with main circuit unit through bus, mainly finishes the transmitting-receiving work of IP data.Key board is connected with main circuit unit by general input and output (GPIO) holding wire, and CPU reads keyboard instruction in view of the above, and starts corresponding application, realizes appointed function.

Different is, IP video telephone main frame of the present utility model is discussed key, is preserved key, page turning key, multi-party communication key for the blank discussion has increased into video/hand-written display switching key, blank on existing key board, also for making things convenient for the IP face-to-face communication to use, part is adjusted button: function buttons such as IP address display key, IP address mode key, private ip address decollator ". " key, Chinese name phonetic mode (containing English name) key, Chinese name Chinese character mode key, local image shielding; Main circuit unit receives input data from the ultrasonic wave receiving and processing device by USB or RS232 serial ports, and according to the instruction of corresponding function button the input data is handled, and realizes keypress function.Display unit not only can the display video image, can also show the handwriting input person's handwriting, realizes the switching between the two by video/hand-written display switching key.

IP video telephone main frame of the present utility model adopts codec (CODEC) chip of supporting one or more image encoding standards such as MPEG4, H263, H263++.CODEC chip self is connected DRAM, SDRAM by bus respectively with internal data line, for its encoding and decoding buffer memory uses; The CODEC chip hangs on the PCI or other types bus of CPU.This moment, the CPU of main station passed through driver, and the data of input picture and sound are delivered to CODEC encoded video and audio frequency inlet, drove CODEC and encoded, and coding result becomes audio/video flow according to protocol encapsulation, hands over CPU to handle through bus.CPU finally is encapsulated as the IP bag with the agreement of audio/video flow according to the IP video telephone, issues the far-end IP video telephone.Simultaneously, the CPU of IP video telephone main frame drives mixed-media network modules mixed-media, receives the image compression data of far-end IP video telephone, is sent to the CODEC decoding, and decoded result outputs to local video and audio output port.So on the realization IP network based on the Visual communications of MPEG4, H263 and/or H263++ graphics standard.

IP video telephone set of the present utility model set up to be called out according to " IP video telephone technical standard " agreement, can call out online or online user not." IP video telephone technical standard " agreement regulation IP video telephone has multiple networking form, in the carrier-class IP video telephone net will based on video telephone set to video telephone set, video telephone set to mobile video telephone and PC to video telephone set.For the interests of considering each side need, agreement can be defined in the IP video telephone net, and user's video telephone communication Service Design is become through gateway and IP network to link up.Concerning IP video telephone net, the information transmission is a flat topology structure, and promptly the video voice flow is directly to transmit between gateway and gateway.The management level of carrier class IP video telephone net then are layerings, and the management level of hierarchy are convenient to set up catenet.According to the needs of business development, the level layer of IP video telephone net can be divided into three layers, is respectively secondary layer, one-level layer and top layer.

The secondary layer is the basis of IP video telephone management level, and it finishes user's access authentication; Address resolution in this secondary layer-management scope and the address resolution request that exceeds this secondary layer-management scope to the initiation of higher level's layer; Realization is managed each calling of gateway in this secondary layer-management scope to resource and resource allocation in the layer-management scope at the corresponding levels; The secondary layer is the charging collection point in the IP video telephone net.

The one-level layer is the intermediate layer of management level in the IP video telephone net, its task is the address resolution of finishing in layer-management scope at the corresponding levels, in case its lower floor's secondary layer is found the address of the parsing that requires and has been exceeded its scope, the secondary layer promptly is responsible for the one-level layer to it and is initiated the address resolution request, the one-level layer is after receiving secondary layer analysis request, as determine that it finishes parsing immediately in its passable analytical range.The result is returned to the secondary layer to finish this address resolution then.Confirm that as the one-level layer this address resolution request has exceeded its analytical range, then send analysis request to its top layer, if there is the level layer address that to resolve this address in its fast storage (cache), then the one-level layer can send the address resolution request to corresponding stage layer (can be other one-level layer, also can be other secondary layer).

Top layer is the top of management level in the IP video telephone net, its main effect is to finish top address resolution among this operator, when the address when the one-level layer can't be realized resolving, the one-level layer will be initiated the address resolution request to top layer, if the address resolution between the same operator, top layer will can be finished this time address resolution level layer address to the one-level layer transmission of the request of sending, then do not return this top layer address if parse addresses is not address between the same operator, calling will make a circulation (top layer) carry out.Top layer also will be responsible for (comprising domestic and external) between the different operators and call out circuitous the processing except that will realizing that top level address is resolved, and it will have the ability of call treatment and charging.Top another operator's of course top layer request address resolved, and another operator will transmit the level layer address that can finish this time address resolution to the top layer of the request of sending, thereby realize address resolution procedure.

The IP video telephone will solve subscriber-coded scheme in interconnecting, and considers present custom and personalization, and the applicant advises as follows:

Adopt international 3, long-distance 4, move 4 of 2, local 8, extension set, and with the consistent principle of its present toll free number binding.For example: " 086 0,010 01 03,423,752 0000 ".The subscriber-coded scheme of IP video telephone is as follows:

|XXX |XXXX |XX |XXXXXXXX |XXXX |

| 3 | 4 | 2 | 8 | 4 |

| international position | long-distance position | move the position | this status | divide the seat in the plane |

Define 2 bit representations move the position be in order to solve mobility.Select ambulant user: a class is feature with the cell phone, and another kind of permanent plant with the different location is a feature, PC for example, PAD, IP video telephone set, set-top box or the like.Carry out the same user of IP face-to-face communication for permanent plant with the different location, in order to adapt to its moving characteristic, take to distribute his mobility user livery affair logon mode, for example " 086 0,010 10 08,238,095 0000 ", will be by a series of registration process, the user is tied to " 086 0,010 10 08,238,095 0000 " permanent plant in a certain place, for example " 086 001,001 12,345,678 0000 " as required.Certain user's IP video telephone is the mobility of application, and so just a people monopolizes this number, and needn't to worry influence other people because of he " calling transfer ".This moment, he can be with his IP video telephone number of mobility, and registration binding (" calling transfer ") is to IP video telephone number of an Immobility.Allow fixing IP video telephone to carry out calling transfer at this machine.IP video telephone user moves the position coding can adopt following scheme:

00	Fixing
		01	IP address/reservation
10	Move
		11	User name phonetic/reservation

Local call is described: calling number is " 086 0,010 01 03,423,752 0000 ", and called number is " 086 001,001 08,238,095 0000 ".The calling subscriber finishes in IP video telephone secondary layer registration login, send and call out the called subscriber, this moment is initiated inquiry to the registration of IP video telephone secondary layer earlier in caller, the trade mark enquiries of IP video telephone secondary layer are called online, then call out report to called sending, whether inquiry hurries or not busy state, sends a frame picture of caller at not busy state, and whether be ready to answer, set up.If not online, initiate the call information under the snmp protocol, call out and wake up.

International call is described: called number is that " 001 0,273 01 12,345,678 0000 " initiate inquiry by the registration of one-level layer to top layer registration rapidly based on " 001 0273 ", and the top layer registration of IP video telephone pointed to the secondary layer registration at called place and initiated inquiry; Inquire about called onlinely, then call out report to called sending, whether whether inquiry busy or not busy state, send a frame picture of caller at not busy state, and be ready to answer, and sets up.If not online, initiate the call information under the snmp protocol, call out and wake up.

Dial mode is according to the user ID coding standard in the IP video telephone technical standard; Also can finish according to other industry standard.Calling subscriber's off-hook, by setting, CPU finishes with automatic control mode or other modes and obtains the legal IP of operator and go up net address, also finishes IP online permission simultaneously.For example, in residential quarters or office building, can obtain the IP address with DHCP, or use fixed ip address by its management method; ADSL user in this way, the PPPoE dialing authentication of then finishing ADSL obtains the IP address of this machine, or uses fixed ip address.Then, calling subscriber CPU finishes the serving grant process with automatic or other modes to the IP video telephone service provider registration of selecting.Afterwards, CPU dials the off-hook people called " number " (or the claiming the user ID coding) of crying by keyboard, carry out the IP encapsulation of message data according to the agreement of taking with IP video telephone service provider, for example four kinds of standard definition modes enumerating according to the user ID coding that adopts in the IP video telephone technical standard: the Chinese characters in common use mode " Liu Xijie " of (1) name; (2) phonetic commonly used (the containing English name) mode " liuxijie " of name; (3) according to registration ID " 086001001034237520000 "; (4) IP address " 202.108.210.223 " is encapsulated into the IP bag with them according to the form of protocol message.Caller IP phone machine enters the message related to calls acknowledgment phase of carrying out call establishment with the equipment of IP video telephone service provider, and the equipment of IP video telephone service provider is searched the called subscriber its several main states is searched: do not have registration, active registration, invalid login, online, not online, call out that to transfer to new ID online or not online.For called be active registration ID, the agreement that the equipment of IP video telephone service provider is formulated according to the IP visual telephone service sends a series of hello protocol message, helps the called IP that sets up of caller to connect.Caller obtains called IP address, and the calling of caller is replied in called acquisition, beginning face-to-face communication between the two.

It is to finish at the caller called party answer that blank is discussed function, carry out face-to-face communication between the two after.Can be by the video on the lower keyboard/hand-written display switching key, LCD (or other display unit) enters and shows hand-written discussion manuscript.CPU learns by GPIO, starts the remote white boarding discussion and uses.After CPU begins to obtain continuously ultrasonic wave writing pen pen tip position value, be responsible on the one hand constantly on local display device, showing written handwriting in real time, on the other hand, be responsible for simultaneously constantly with the ultrasonic wave writing pen pen tip position value that obtains, inside blank agreement by appointment, for example define various message, define the data structure of each message, define the total byte length of each message, definition X/Y divide other byte length, current hand-written page definition is represented, refresh page definition expression, preceding page turning definition, back page turning definition, the high byte alignment is low byte alignment or the like still, the data that formation is ready for sending, these data encapsulation are sent to the IP video telephone set of far-end in the IP bag, after the far-end IP video telephone set is received these IP bags, taking-up is encapsulated in the data in the IP bag, carry out by appointment to data that agreement makes an explanation, drive display device and show.The far-end IP video telephone set constantly receives the data of sending in real time, finally finishes the distal displayed of person's handwriting, promptly finishes basic whiteboard applications process.If the user presses blank discussion key again, and the position that will revise is adjusted in the nib demonstration.Enter on hand-written discussion manuscript and carry out the blank discussion.According to the blank agreement, after CPU learns by GPIO, beginning is continuously with local pen tip position value, be responsible on the one hand constantly showing written handwriting in this locality with the different colours stack in real time, on the other hand, be responsible for the pen tip position value, inside blank agreement by appointment, the data that formation is ready for sending, these data encapsulation are sent to the other side IP video telephone set in the IP bag, after the other side IP video telephone set was received these IP bags, agreement made an explanation by appointment, also be presented on the former original handwriting, realize the blank discussion with another color stack.

The utility model is by installing hand input device additional on existing IP video telephone set, and the main station structure has been carried out suitable change, makes the IP video telephone set possess and carries out the feature functionality that remote white boarding is discussed.The IP video telephone set of this band hand input device has according to common writing style equally finishes the function of writing input, convenient being suitable for.The utility model IP video telephone set can provide video voice communication and blank discussion easily simultaneously, and it will become emerging communication service equipment and be widely used in environment such as long-distance education and network office.The utility model can also be set up function button according to demand, with a certain new function of convenient realization, as realizing blank discussion in many ways by the multicast communication of using IP.

Description of drawings further specifies the utility model below in conjunction with drawings and Examples.

Fig. 1 is a ultrasonic wave writing pen external structure.

Fig. 2 is for utilizing ultrasonic test positioning principle figure.

Fig. 3 comprises the circuit module figure of X, Y value computing module for the inside of ultrasonic wave receiving and processing device.

Fig. 4 does not comprise the circuit module figure of X, Y value computing module for the inside of ultrasonic wave receiving and processing device.

Fig. 5 is the external structure of the ultrasonic wave writing pen of band mouse function.

Fig. 6 is the internal circuit module map of the ultrasonic wave writing pen of band mouse function.

When Fig. 7 had mouse function for the ultrasonic wave writing pen, the inside of ultrasonic wave receiving and processing device comprised the circuit module figure of X, Y value computing unit.

When Fig. 8 had mouse function for the ultrasonic wave writing pen, the inside of ultrasonic wave receiving and processing device did not comprise the circuit module figure of X, Y value computing unit.

Fig. 9 is when comprising computing unit, and ultrasonic wave receives the structure chart of handling drive software.

Figure 10 is not when containing computing unit, and ultrasonic wave receives the structure chart of handling drive software.

Figure 11 is an IP video telephone host computer system hardware schematic diagram.

Figure 12 is an IP video telephone main circuit unit theory diagram.

Figure 13 is LINUX operating system configuration figure.

Figure 14 is the utility model separate unit IP video telephone set schematic diagram.

Figure 15 is the IP video telephone set schematic diagram in the utility model communication use.

Ultrasonic wave writing pen in embodiment the utility model can adopt external structure shown in Figure 1, is made of ultrasonic wave launch hole 2, a body 3 and the cap for brush 4 near nib 1, the nib 1.Form of a stroke or a combination of strokes enclosure at the ultrasonic wave writing pen is equipped with printed circuit and power supply.Printed circuit is made up of ultrasonic transmit circuit and ultrasonic wave transducer emission.Ultrasonic transmit circuit and ultrasonic wave transducer emission composition are finished the ultrasonic wave emission function.During work, press nib and can connect ultrasonic transmit circuit, ultrasonic wave penetrates from the ultrasonic wave launch hole.

The utility model utilizes ultrasonic wave to meet edge reflections, ultrasonic wave propagation principle in air at dielectric surface propagation, ultrasonic surface, by the reference timing, realizes the handwriting input location.

Referring to Fig. 2, the ultrasonic wave writing pen is p point emission ultrasonic signal planar, at surperficial drive surface ultrasonic wave, the time of advent in the ultrasonic surface communication process of ordering to o point and p point to s by ultrasonic receiver record p point, writing down this ultrasonic surface simultaneously reflexes to o point and reflexes to time of advent in the communication process that s orders at the [that the p point passes through paper or LCD at the p point through the [of paper or LCD, with carrying out reference the time of advent of above 4 incidents mutually, for example the p point is to the s point t time of advent _S1Reflex to the t time of advent that s is ordered with the p point through [ _S2Cross-reference, the p point is to the o point t time of advent _O1Reflex to the t time of advent that o is ordered with the p point through [ _O2Cross-reference can obtain (1) Δ t _s=t _S2-t _S1, (2) Δ t _o=t _O2-t _O1Expression formula; (1) and (2) expression formula can measure, list equation and find the solution, (3) and (4) expression formula provides the location computing of ultrasonic wave writing pen nib fully, thereby determines the pen tip position of ultrasonic wave writing pen.Along with moving of ultrasonic wave writing pen nib, the ultrasonic wave writing pen is launched ultrasonic wave simultaneously in this process, still repeats above-mentioned timing course, obtains all positions in the ultrasonic wave writing pen nib moving process, note, and promptly be written handwriting.

Based on reference timing principle, can also select other to determine the pen tip position of ultrasonic wave writing pen with reference to approach.Such as, the ultrasonic wave writing pen is at p point emission ultrasonic signal, at surperficial drive surface ultrasonic wave, by ultrasonic wave receiving and processing device record p point to o point and p point to ultrasonic surface propagation time of advent that s is ordered, write down simultaneously this ultrasonic surface from the p point through air borne to propagation time of advent that o point and s are ordered, with carrying out reference the time of advent of above 4 incidents each other, for example the p point arrives the cross-reference time of advent that s is ordered to the s point time of advent and p point through air borne, the p point can obtain (1) through air borne to the cross-reference time of advent that o is ordered to the o point time of advent and p point, (2) expression formula, thereby can list equation finds the solution, (5) and (6) expression formula provide the location computing of ultrasonic wave writing pen nib fully, thereby determine the pen tip position of writing pen.Along with moving of writing pen nib, writing pen is launched ultrasonic wave simultaneously in this process, still repeats said process, obtains writing pen nib all positions in moving, note, and promptly be written handwriting.

$x_1=\frac{-B+\sqrt{B^2-4\mathrm{AC}}}{2A}---------\left(3\right)$

$y=\sqrt{{(\mathrm{\ω}+\mathrm{\μ}{x}_{\mathrm{1,2}})}^2-x_{\mathrm{1,2}}^2}-----------\left(4\right)$

$x_{\mathrm{1,2}}=\frac{l^2+{\mathrm{\ζ}}^2-{\mathrm{\χ}}^2}{2l}+2a--------\left(5\right)$

$y=\sqrt{{\mathrm{\ζ}}^2-{\left(\frac{l^2+{\mathrm{\ζ}}^2-{\mathrm{\χ}}^2}{2l}\right)}^2}---------\left(6\right)$

Δ t wherein _sc _Medium=β, Δ t _oc _Medium=λ, $\mathrm{\ω}=\frac{{\mathrm{\λ}}^2-4a^2}{2\mathrm{\λ}},$ $\mathrm{\μ}=\frac{2a}{\mathrm{\λ}},$ $A=({\mathrm{\μ}}^2-\frac{{4b}^2}{{\mathrm{\β}}^2}),$

$B=\{2\mathrm{\ω\μ}-4a-2l+\frac{2b}{{\mathrm{\β}}^2}[4(2a+b+l)b-{\mathrm{\β}}^2\left]\right\},$ $C=\{{\mathrm{\ω}}^2+{(2a+l)}^2-\frac{1}{{4\mathrm{\β}}^2}[4(2a+b+l)b-{\mathrm{\β}}^2{]}^2\},$ c _Medium, c _AirBe respectively ultrasonic wave in medium and airborne propagation velocity.

As shown in Figure 3, the circuit module of ultrasonic wave receiving and processing device comprises ultrasonic wave receiver module, ultrasound examination amplification module, internal proprietary operator block, in-line coding module and interface module.Wherein, the ultrasonic wave receiver module is made of ultrasonic transducer, comprises two ultrasonic transducers separated by a distance.Ultrasonic wave receiver module two-way receives ultrasonic wave writing pen ultrasonic waves transmitted signal, is translated into the signal of telecommunication, and gives the ultrasound examination amplification module with it.The ultrasound examination amplification module receives the signal of telecommunication that the ultrasonic wave receiver module is sent here, with its amplification, exports Δ t respectively by internal control circuit _oValue and Δ t _sValue, the internal proprietary operator block quantizes Δ t _oValue and Δ t _sValue is finished the calculating of pen tip position coordinate X, Y value fast according to (3), (4) expression formula or (5), (6) expression formula.The in-line coding module is responsible for pen tip position coordinate X, Y value are encoded according to the coded data form, gives interface module.Interface module is finished the level compatibility of USB or RS232 serial ports physical connection, is connected on the main station at last.

If select the microprocessor self-carried USB or/and RS232 serial interface signal pins, then interface module can be incorporated the in-line coding module into.

The ultrasonic wave receiving and processing device also can not comprise the internal proprietary operator block, handles and give the external arithmetic device with this partial arithmetic, as finishing calculating by the main station innernal CPU.As shown in Figure 4, the circuit module of ultrasonic wave receiving and processing device comprises ultrasonic wave receiver module, ultrasound examination amplification module, in-line coding module and interface module.At this moment, in-line coding module is responsible for Δ t _oValue and Δ t _sValue is encoded according to the coded data form, gives interface module, transfers to the main station innernal CPU by USB or RS232 serial ports again and finishes calculating.

As seen, for containing the computing module, the ultrasonic wave receiving and processing device receives ultrasonic wave writing pen ultrasonic waves transmitted, and the value that will calculate X, Y generates data output by data transmission format; For not containing the computing module, the ultrasonic wave receiving and processing device receives ultrasonic wave writing pen ultrasonic waves transmitted, does not calculate the value of X, Y, just with Δ t _oValue and Δ t _sValue is sent; Calculate the value of X, Y by main station CPU.Last CPU finishes and writes input function by writing the input application program.Be adjective further specifying below.

Driver interrupts with detection signal in initialization, and reading also, decryption stream makes data be accepted by software.It is identical with receiving processing for the ultrasonic wave that contains computing substantially that driver receives processing for the ultrasonic wave that does not contain computing, just slightly has any different in the part of decryption stream.Fig. 9 is when comprising computing unit, and ultrasonic wave receives the structure chart of handling drive software; Figure 10 is not when containing computing unit, and ultrasonic wave receives the structure chart of handling drive software.Relevant handwriting input API is a upper application software, and it is read serial ports or USB mouth and control LCD picture point function by control and calls, and can finish record handwriting task.

The applicant discloses a kind of ultrasonic locating multifunctional pen shape mouse in an other patent application.This multifunctional pen shape mouse both can have been finished the function of handwriting input, possessed the function of the common mouse finished simultaneously again.Wherein the external structure of MousePen is seen Fig. 5, is made of ultrasonic wave launch hole 6, mousebutton 7, a body 8, infrared emission hole 9 and the cap for brush 10 near nib 5, the nib 5.Printed circuit and power supply are housed in the MousePen shell, and as shown in Figure 6, the inner printed circuit of MousePen comprises microprocessor, infrared emission circuit, mouse state circuit, ultrasonic transmit circuit and ultrasonic wave transducer emission.The mouse state circuit is responsible for realizing key switch state up and down; Microprocessor is responsible for reading key-press status up and down, and finishes the infrared emission coding of this value, the emission of control infrared emission circuit; The infrared emission circuit is launched infrared signal under microprocessor control; Ultrasonic transmit circuit and ultrasonic wave transducer emission composition are finished the ultrasonic wave emission function.During work,, connect the circuit emission ultrasonic wave of ultrasonic wave emission by nib following pressing in the plane; By key up and down the time, after internal microprocessor detects, the emission infrared signal.Obviously, this MousePen can directly be used as ultrasonic wave writing pen of the present utility model.But this moment, system does not need to support the mouse function of MousePen.

In order to keep the mouse function of MousePen, the ultrasonic wave receiving and processing device need be done suitable adjustment.As hereinbefore, the ultrasonic wave receiving and processing device can comprise the internal proprietary operator block, also can not comprise the internal proprietary operator block.

When Fig. 7 had mouse function for the ultrasonic wave writing pen, the inside of ultrasonic wave receiving and processing device comprised the circuit module figure of X, Y value computing unit.As seen, the circuit module of ultrasonic wave receiving and processing device comprises seven internal modules such as ultrasonic wave receiver module, ultrasound examination amplification module, internal proprietary operator block, infrared receiving module, infrared control signal processing module, inner three byte code modules and mouse interface circuit module.Wherein, the ultrasonic wave receiver module is made of ultrasonic transducer, comprises two ultrasonic transducers separated by a distance.The ultrasonic wave receiver module receives ultrasonic wave writing pen ultrasonic waves transmitted signal, is translated into the signal of telecommunication, and gives the ultrasound examination amplification module with it.The ultrasound examination amplification module receives the signal of telecommunication that the ultrasonic wave receiver module is sent here, with its amplification, exports Δ t respectively by internal control circuit _oValue and Δ t _sValue, the internal proprietary operator block quantizes Δ t _oValue and Δ t _sValue is finished the calculating of pen tip position coordinate X, Y value fast according to (3), (4) expression formula or (5), (6) expression formula.Infrared receiving module receives the infrared signal of MousePen emission, and is translated into the signal of telecommunication, passes to the infrared control signal processing module.The infrared signal of telecommunication that infrared control signal processing module Treatment Analysis infrared receiving module is sent identifies infrared encoded signal, and gives inner three byte code modules with it.Inner three byte code modules are internal microprocessors, and main being responsible for X, Y value, and infrared control status signal are carried out three byte codes according to three byte code data formats, give the mouse interface circuit module.The mouse interface circuit module is finished the level compatibility of USB, RS232 serial ports or 6pin Mini-DIN (PS/2) physical connection.

If select microprocessor self-carried USB, RS232 serial ports or 6pin Mini-DIN (PS/2) interface signal pin, the mouse interface circuit module can be incorporated inner three byte code modules into.

When Fig. 8 had mouse function for the ultrasonic wave writing pen, the inside of ultrasonic wave receiving and processing device did not comprise the circuit module figure of X, Y value computing unit.As seen, the circuit module of ultrasonic wave receiving and processing device comprises six internal modules such as ultrasonic wave receiver module, ultrasound examination amplification module, internal proprietary operator block, infrared receiving module, the infrared control signal processing module that receives, inner three byte code modules and mouse interface circuit module.Wherein, ultrasonic wave receiver module, ultrasound examination amplification module, infrared receiving module, the infrared control signal processing module that receives and mouse interface circuit module are consistent with the description of Fig. 7, and difference is inner three byte code modules.Inner three byte code modules are responsible for Δ t _oValue, Δ t _sValue and infrared control status signal carry out three byte codes according to three byte code data formats, give the mouse interface circuit module.If select microprocessor self-carried USB, RS232 serial ports or 6pin Mini-DIN (PS/2) interface signal pin, the mouse interface circuit module can be incorporated inner three byte code modules into.

As shown in figure 11, the main station key board can adopt 5 * 5 keyboard matrixs.On 5 * 5 keyboard matrix circuits, 25 key key names can distribute like this: 0-9 digital keys, video/hand-written display switching key, blank is discussed key, preserves key, page turning key, the multi-party communication key, IP address display key, IP address mode key, private ip address decollator ". " key, Chinese name phonetic mode (containing English name) key, Chinese name Chinese character mode key, redial key, some function buttons such as local image shielding.

Main station main circuit unit theory diagram such as Figure 12, there are central processor CPU, MPEG4 codec chip CODEC, static RAM SDRAM, dynamic random access memory DRAM, flash memory FLASH and peripheral interface circuit module in inside.Wherein, the network device driver module is supported IP stack, and the data that responsible processing sends from network comprise real-time tranception audio/video flow, hand-written data, two-way control signal etc.The CODEC module is in charge of the coding unit that audio frequency and video is decoded and shooting AV imports in the IP video telephone.After the IP video telephone starts, CPU control GPIO reads the keyboard matrix input command of process user, start and carry out IP network agreement and other various mutual control protocols, processing is sent to local IP data, the IP video data is removed the IP encapsulation, issue MPEG4CODEC by bus, carry out the decoding of MPEG4 code stream, output to LCD from MPEG4 CODEC; The coding of initialization MPEG4 CODEC is imported MPEG4 CODEC with A/V, hands over CPU that data encapsulation is become IP by bus, sends at last and keeps the far-end IP telephone set of setting up communication; The handwriting input data that CPU computing RS232 serial ports, USB interface are sent into, whether preview on LCD of decision when selecting to carry out the blank communication, shows the handwriting input person's handwriting on LCD or other display equipment; And be responsible for constantly showing written handwriting on the local LCD or on the other display equipment in real time according to party to the agreement's face, be responsible for constantly this being obtained simultaneously ultrasonic wave writing pen pen tip position value on the other hand, inside blank agreement by appointment, the data that formation is ready for sending, these data encapsulation are sent to the IP video telephone set of far-end in the IP bag, after the far-end IP video telephone set is received these IP bags, take out the data and the demonstration that are encapsulated in the IP bag.The far-end IP video telephone set constantly receives the data of sending, and finally finishes the distal displayed of person's handwriting.

Software section.The IP video telephone set is a multimedia integration platform environment, and integrated interactive multimedia figure, audio frequency, animation and MPEG4 video flowing CODEC, and functions such as remote white boarding discussion, handwriting input can show with LCD or other display equipment.Can also increase simultaneously numerous application of user interface close friend, support the online upgrading of using simultaneously.Software is made up of operating system and application software two large divisions.CPU can select several operation systems for use.With LINUX is that example is simply introduced.As Figure 13, be the LINUX that reduces through kernel, form a basic kernel operations system.

The blank communication function is after the caller called party answer begins between the two face-to-face communication, can key be discussed by the blank on the lower keyboard, starts the remote white boarding discussion and uses.Figure 15 is the IP video telephone set schematic diagram in the utility model communication use.

In IP video telephone of the present utility model, increase handwriting recognition software, can realize importing person's handwriting identification, thereby be converted into type fount.

IP video telephone set of the present utility model can also be used to watching the video frequency program that sends with the program request or the forms of broadcasting.Its design realizes that feature is according to the virtual condition of Internet, two kinds of designs to be arranged.A kind of is to have special services sites.Dial the IP address or the Chinese and English title of this services sites with the IP video telephone set, the perhaps registration ID " 086001001000088880000 " (shortcode) that obtains according to the user ID coded system that adopts in the IP video telephone technical standard, after putting through messaging protocol form Certificate Authority by appointment, the messaging protocol form that continues by appointment carries out the program downloading menu, selective, if IP film/news broadcast station, Yue Ding messaging protocol form begins to receive audio bitstream at last, and decoding is watched.A kind of webpage and website mode that is based on.The built-in built-in browser of IP video telephone host-initiated, input network address, the program that selection will be watched.

NIU in IP video telephone of the present utility model increases IP and wakes the detection treatment circuit up, constantly intercepts network and sends about calling out the physical layer signal of telecommunication of oneself, wakes up to economize on electricity and save the network expense to be in idle CPU, realizes that the online user is not waken up.

Claims (10)

1. the IP video telephone set with hand input device is characterized in that being made up of ultrasonic wave writing pen, video telephone main frame and coupled ultrasonic wave receiving and processing device;

The ultrasonic wave writing pen is used to launch ultrasonic wave and handwriting input, by form of a stroke or a combination of strokes shell, place printed circuit and power supply in the shell to constitute, on near the shell the nib, be provided with the ultrasonic wave launch hole, printed circuit is made up of ultrasonic transmit circuit and ultrasonic wave transducer emission, press nib and can connect ultrasonic transmit circuit, ultrasonic wave penetrates from the ultrasonic wave launch hole;

The ultrasonic wave receiving and processing device is used to receive ultrasonic wave and subsequent processing, and its circuit module comprises ultrasonic wave receiver module, ultrasound examination amplification module, in-line coding module and interface module; The ultrasonic wave receiver module comprises two ultrasonic transducers separated by a distance at least, ultrasonic wave receiver module two-way receives ultrasonic wave writing pen ultrasonic waves transmitted signal, be translated into the signal of telecommunication, and give the ultrasound examination amplification module with it, the ultrasound examination amplification module receives the signal of telecommunication that the ultrasonic wave receiver module is sent here, it is amplified, by two reference time value Δ t that draw based on reference timing principle of internal control circuit output _sWith Δ t _oGive the in-line coding module, the in-line coding module is responsible for Δ t _sWith Δ t _oEncode according to the coded data form, give interface module, interface module is realized being connected between ultrasonic wave receiving and processing device and the video telephone main frame by USB or RS232 serial ports;

The video telephone main frame comprises IP network interface unit, main circuit unit, image unit, display unit and key board; Keyboard at least also comprises video/hand-written display switching key, blank discussion key, preserves key, page turning key and multi-party communication key except that comprising ordinary numbers key and function key; Main circuit unit receives input data from the ultrasonic wave receiving and processing device by USB or RS232 serial ports, and according to the instruction of corresponding function button the input data is handled, and realizes keypress function; Display unit not only can the display video image, can also show the handwriting input person's handwriting, realizes the switching between the two by video/hand-written display switching key;

Video telephone main frame main circuit unit comprises central processor CPU, MPEG4 or H263 codec chip CODEC, static RAM SDRAM, dynamic random access memory DRAM, flash memory memory FLASH and peripheral interface circuit module; The CODEC chip is connected DRAM, SDRAM by bus respectively with internal data line, for its encoding and decoding buffer memory uses; The CODEC chip hangs on the PCI or other types bus of CPU; The reference time value that CPU transmits according to the ultrasonic wave receiving and processing device is calculated writing pen pen tip position coordinate; CPU delivers to CODEC chip encoded video and audio frequency inlet by driver with the data of input picture and sound, drives the CODEC chip and encodes, and coding result becomes audio/video flow according to protocol encapsulation, hands over CPU to handle through bus; CPU according to IP video telephone agreement, finally is encapsulated as the IP bag with audio/video flow, issues the far-end IP video telephone; Simultaneously, CPU receives the image compression data of far-end IP video telephone, is sent to the decoding of CODEC chip, and decoded result outputs to local video and audio output port, realizes the Visual communications on the IP network.

2. IP video telephone set according to claim 1 is characterized in that: described Δ t _sFor ultrasonic surface reflexes to the poor of the time of first acceptance point (S) and ultrasonic surface is directly propagated into first acceptance point (S) by launch point (P) time, described Δ t by launch point (P) through [ _oFor ultrasonic surface reflexes to the poor of the time of secondary destination (O) and ultrasonic surface is directly propagated into secondary destination (O) by launch point (P) time by launch point (P) through [.

3. IP video telephone set according to claim 1 is characterized in that: described Δ t _sDirectly propagate time of arriving first acceptance point (S) and ultrasonic wave for ultrasonic wave by launch point (P) through air and propagate time poor of arrival first acceptance point (S), described Δ t by launch point (P) through energized plane upper surface ripple _oDirectly propagate time of arriving secondary destination (O) and ultrasonic wave for ultrasonic wave by launch point (P) through air and propagate time poor of arrival secondary destination (O) by launch point (P) through energized plane upper surface ripple.

4. IP video telephone set according to claim 1 and 2 is characterized in that: the circuit module of ultrasonic wave receiving and processing device also comprises the internal proprietary operator block; The ultrasound examination amplification module will be worth Δ t the reference time _sWith Δ t _oExport to the internal proprietary operator block, the internal proprietary operator block quantizes the reference time value, finishes the calculating of writing pen pen tip position coordinate figure fast, and result of calculation is sent to the in-line coding module encode; The video telephone host CPU no longer calculates writing pen pen tip position coordinate figure.

5. IP video telephone set according to claim 3 is characterized in that: the circuit module of ultrasonic wave receiving and processing device also comprises the internal proprietary operator block; The ultrasound examination amplification module will be worth Δ t the reference time _sWith Δ t _oExport to the internal proprietary operator block, the internal proprietary operator block quantizes the reference time value, finishes the calculating of writing pen pen tip position coordinate figure fast, and result of calculation is sent to the in-line coding module encode; The video telephone host CPU no longer calculates writing pen pen tip position coordinate figure.

6. IP video telephone set according to claim 4 is characterized in that: two buttons that also have infrared emission hole and replacement common mouse left-right key on the form of a stroke or a combination of strokes shell of ultrasonic wave writing pen; The writing pen printed circuit also comprises microprocessor, infrared emission circuit and mouse state circuit, and the mouse state circuit is responsible for realizing two key switch states; Microprocessor is responsible for reading key-press status, and finishes the infrared emission coding of this value, control infrared emission circuit emission infrared signal;

The circuit module of ultrasonic wave receiving and processing device also comprises infrared receiving module and infrared control signal processing module, and the in-line coding module is three byte code modules; Infrared receiving module receives the infrared signal of writing pen emission, and is translated into the signal of telecommunication, passes to the infrared control signal processing module; The infrared signal of telecommunication that infrared control signal processing module Treatment Analysis infrared receiving module is sent identifies infrared encoded signal, and gives inner three byte code modules with it; Inner three byte code modules are internal microprocessors, are responsible for Δ t _s, Δ t _oAnd infrared encoded signal, carry out three byte codes according to three byte code data formats, and give interface module.

7. according to any described IP video telephone set in the claim 1,2,3 and 5, it is characterized in that: two buttons that also have infrared emission hole and replacement common mouse left-right key on the form of a stroke or a combination of strokes shell of ultrasonic wave writing pen; The writing pen printed circuit also comprises microprocessor, infrared emission circuit and mouse state circuit, and the mouse state circuit is responsible for realizing two key switch states; Microprocessor is responsible for reading key-press status, and finishes the infrared emission coding of this value, control infrared emission circuit emission infrared signal;

The circuit module of ultrasonic wave receiving and processing device also comprises infrared receiving module and infrared control signal processing module, and the in-line coding module is three byte code modules; Infrared receiving module receives the infrared signal of writing pen emission, and is translated into the signal of telecommunication, passes to the infrared control signal processing module; The infrared signal of telecommunication that infrared control signal processing module Treatment Analysis infrared receiving module is sent identifies infrared encoded signal, and gives inner three byte code modules with it; Inner three byte code modules are internal microprocessors, are responsible for Δ t _s, Δ t _oAnd infrared encoded signal, carry out three byte codes according to three byte code data formats, and give interface module.

8. according to any described IP video telephone set in the claim 1,2,3 and 5, it is characterized in that: the network interface unit of video telephone main frame also comprises IP and wakes the detection treatment circuit up, constantly intercepting network sends about calling out the physical layer signal of telecommunication of this machine, wake the CPU under the non operating state up, realize that the online user does not wake up.

9. IP video telephone set according to claim 4, it is characterized in that: the network interface unit of video telephone main frame also comprises IP and wakes the detection treatment circuit up, constantly intercepting network sends about calling out the physical layer signal of telecommunication of this machine, wake the CPU under the non operating state up, realize that the online user does not wake up.

10. according to any described IP video telephone set in the claim 1,2,3 and 5, it is characterized in that: IP video telephone main frame key board adopts 5 * 5 keyboard matrix structures.

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