JPH05316109A - Control method for still picture conference device - Google Patents

Abstract

PURPOSE:To attain smooth progress of agenda in a conference employing the still picture conference terminal. CONSTITUTION:A conference paper material used for a still picture conference communication operation is informed from a caller terminal to a called terminal at the initial dialing when a still picture conference communication function is designated, and when it is cleared that a required conference paper material is prepared, the call connection operation is executed and the usual still picture conference operation is implemented. When it is clear that a deficient conference paper material is in existence in the called terminal at the initial calling of a designated still picture conference communication function and the caller terminal intermits the call connection operation at that point of time. Then the caller terminal uses a group 4 facsimile communication equipment to send the noticed deficient conference material to the called terminal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, and a conference proceeding function. The present invention relates to a method for controlling a still image conference device having a still image conference function and a document storage function for storing document information such as conference materials.

[0002]

2. Description of the Related Art In recent years, a still image conference device (communication conference device) has been proposed as a device that enables a conference based on a document that is insufficient with only a video conference device. This still image conferencing apparatus has a call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials,
It has a still image conference function for proceedings and a document saving function for saving document information such as meeting materials, and sends meeting materials to the other terminal prior to the meeting or when necessary during the meeting. , Referring to the same conference materials,
A conference is held using a call function or a telewriting communication function.

[0003]

However, the following inconvenience has occurred in such a still picture conference apparatus.

That is, for example, when the conference material is transmitted prior to the conference, a communication error occurs when the data of the conference material is transmitted, or the user on the receiving side mistakenly deletes the necessary conference material. In some cases, the conference material is not stored in the other terminal. When such a situation occurs, there is an inconvenience that the still image conference cannot smoothly proceed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of controlling a still image conference apparatus capable of smoothly proceeding a still image conference.

[0006]

The present invention provides a call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, and a conference proceeding function. In the method of controlling a still image conference device equipped with a still image conference function for storing and document saving function for storing document information such as conference materials, a call is made in the still image conference communication mode, and then the conference communication at that time is performed. The identification information of the conference materials used is mutually exchanged. The identification information of the conference material may be exchanged by using a procedure signal exchanged on the information channel.

Further, a call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, a still image conference function for proceeding proceedings, and In a method of controlling a still image conference device that has a document storage function for storing document information such as conference materials, when the call is connected in the still image conference communication mode, the identification information of the conference materials used in the conference communication at that time is displayed. They are designed to be exchanged with each other. The identification information of the conference material may be exchanged by using a predetermined information element of the call control signal exchanged on the signal channel.

A call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, a still image conference function for proceeding with proceedings, and In a method for controlling a still image conference apparatus having a document storage function for storing document information such as conference material, the calling terminal uses the conference material used in the conference communication at the time of calling in the still image conference communication mode. Identification information of the meeting information to the called terminal, and when the called terminal does not save the meeting material notified when the incoming call in the still image conference communication mode is detected, that and the identification of the missing meeting material When a response message including insufficient material information indicating information is transmitted and the calling terminal receives the response message to which the insufficient material information is added,
At that point, after the call is disconnected and recovered, the conference material notified by the above-mentioned insufficient material information is transmitted to the same destination terminal using the facsimile communication function, and then the same destination terminal is called in the still image conference communication mode. It was done.

Further, a call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing a still image such as conference materials, a still image conference function for proceeding with proceedings, and , In the control method of a still image conference device equipped with a document saving function for saving document information such as conference materials, when the transmission of the conference materials is specified after the call connection in the still image conference communication mode, the specification is received. The designated terminal, which has been used at that time, allocates the general data transfer subchannel allocated to the currently established information channel for use in transferring the conference material, and after notifying the partner terminal of the information indicating that, The specified conference material is transferred to the partner terminal via the transfer sub-channel, and the partner terminal transfers the general data from the specified terminal. When notified that a channel will be used for conference material transfer, the transfer subchannel will be used for conference material transfer and the conference material received via the transfer subchannel will be saved. It was done. Further, as the conference material transmitted from the designated terminal to the partner terminal, a conference material formed after the call connection or a conference material formed prior to the call connection can be used.

[0010]

Therefore, the terminal device participating in the still image conference communication can determine the conference material necessary for the still image conference communication at the time of the call setting of the still image conference communication or immediately after the call setting. Since necessary meeting materials can be confirmed before the start of the proceedings of the above, it is necessary to avoid a situation in which the proceedings of the still image conference are found to be insufficient and the proceedings are temporarily interrupted. You can

[0011]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a still image conference apparatus according to an embodiment of the present invention. In addition, this still image conference device,
The ISDN is used as a transmission path, and a conference operation is performed with one partner terminal.

In FIG. 1, a still image conference apparatus 1 includes a call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, and proceedings. Main body device 2 for realizing a still image conference function for storing information, a document storage function for storing document information such as conference material, a scanner device 3 for reading a document image at a predetermined resolution,
Further, the page printer 4 is used for recording and outputting various documents at a predetermined resolution. The scanner device 3 can read and input book originals and continuously read and input sheet originals.

Further, the main body device 2 includes, for example, 1280
A liquid crystal display 5 having a display dot configuration of x960 (to 1728 x 1208) is provided, and the liquid crystal display 5 is provided with a touch panel device 6 capable of designating an arbitrary point on the display screen. ing. The touch panel device 6 is operated by the touch pen 7. Further, the main body device 2 is provided with a handset 8 for communication and a slot of a floppy disk device 9 for storing various data such as document information.

Here, the telewriting communication function will be described.

When this telewriting communication function is used, for example, as shown in FIG. 2, one still image conference device AGC1 is connected between two still image conference devices AGC1 and AGC2 connected via ISDN. When drawing on the screen, the same drawing content is displayed in real time on the screen of the other still image conference apparatus AGC2.

Therefore, by using this telewriting communication function together with the call function, it is possible to make a call and proceed with the meeting while referring to common meeting materials. You can also specify the drawing operation right. In this case,
Only the user of the terminal having this operation right can perform the drawing operation.

In the still image conference apparatus 1, all functions are operated using the touch panel device 6. Therefore,
As a human-machine interface function for the operation, for example, a so-called multi-window operation environment as shown in FIG. 3 is provided.

For example, in the telewriting communication function,
Using this window operation environment, the operation screen shown in FIG. 4 is displayed. On this screen, menu buttons for selecting various applications that can be executed by the still image conference apparatus 1 are arranged at the upper part of the system application screen corresponding to the background, and the application screen of the telewriting application is arranged at the center. It is displayed.

On the application screen, the application name and the file name of the document being displayed are displayed on the top display bar ("Telewriting (" file name ")), and the central document display area is 1 / A4 size
The content of the document is displayed in the range of about 2.

On the right side of the document display area, a plurality of symbols and buttons for selecting various operations on the displayed document are arranged. In this case, from the top,
A screen scroll symbol for moving the display content of the document display screen by a predetermined amount, a previous page button for switching the display content of the document display screen to the previous page, a next button for switching the display content of the document display screen to the next page Page buttons, drawing buttons for performing various drawing operations on the display contents of the document display screen, edit buttons for appropriately deleting the display contents of the document display screen, and changing the display mode of the document display screen Screen button for selecting, a file button for selecting a file operation for the document being operated, a marker button for specifying a marker mode indicating an appropriate position of the display content of the document display screen, and
An end button for terminating the telewriting communication function is arranged.

On the left side of the document display area, a status display area for displaying various kinds of processing status and the like,
Function buttons for selecting various functions such as printing of document information and transmission of designated document information are provided.

By the way, in the communication terminal device having the telewriting communication function, the size of the display screen, the resolution of the display screen, etc. are different for each model. Therefore, when designating the coordinate position, as shown in FIG.
A point O at the upper left corner of one page is set as the origin, and the X direction is set in the right direction (same as the main scanning direction of the facsimile) and forms 90 degrees with the X direction (same as the sub scanning direction of the facsimile).
In the Y direction, the coordinate position is designated by the XY coordinate in BMU unit. Here, 1BMU = (25.
4 mm / 1200).

The document display area on the application screen of the telewriting communication function corresponds to the display size shown by the broken line in FIG.

FIG. 6 shows an example of the configuration of the still image conference apparatus 1 shown in FIG.

In FIG. 1, a CPU (central processing unit) 1
Reference numeral 1 denotes a control process of each part of the still image conference apparatus 1, a call function, a facsimile communication function, a telewriting communication function, a still image conference function, and a document storage function for storing document information such as conference materials. A ROM (Read Only Memory) 12 is for performing control processing, and a ROM 12 is a control program executed by the CPU 11,
Data such as various parameters necessary for executing the control program is stored, and the RAM (random access memory) 13 constitutes a work area of the CPU 11.

The timer device 14 realizes various timer functions, the clock device 15 outputs current time information, and is an SRAM (static RAM).
Is for storing various information unique to the still image conference apparatus 1. This clock device 15 and SRAM 16
Are backed up by the battery 17.

DMA (Direct Memory Access)
The control device 18 does not include the CPU 11
This is for exchanging data at high speed between one peripheral device, and the interrupt control device 19 is for controlling the output of many interrupt signals to the CPU 11.

The printer interface 20 is for connecting the page printer 4 to record and output an image (document), and the scanner interface 21 is for connecting the scanner device 3 to read and input a document image. And the floppy disk interface device 22 is
It is for connecting the floppy disk device 9 and storing / reading / erasing data in a recording medium.

The magnetic disk device 23 is for storing a large amount of various document information, and the magnetic disk interface 24 is connected to the magnetic disk device 23 to store / read / store data in / from the magnetic disk device 23. It is for erasing.

The communication control device 25 is connected to the ISDN and has a call control function for the D channel (signal channel), a call function for the B channel (information channel), a facsimile communication function, a telewriting communication function, and a still image. It is for performing the communication control function of the lower layer of the conference function. The handset 8 is connected to this communication control device 25.

The touch panel control device 26 determines the input coordinate position of the touch panel device 6 at that time based on the output signal of the touch panel device 6 and outputs the input coordinate signal. The input coordinate signal is a signal of a coordinate system unique to the touch panel device 6.
The display control device 27 is for controlling the display screen of the liquid crystal display 5.

CPU 11, ROM 12, RAM
13, timer device 14, clock device 15, SRAM 16,
The DMA controller 18, the interrupt controller 19, the printer interface 20, the scanner interface 21, the floppy disk interface 22, the magnetic disk interface 24, the communication controller 25, the touch panel controller 26, and the display controller 27 are each a system bus. Data transmission between these respective elements is mainly performed via the system bus 28. Further, the hook signal HS indicating the hook state of the handset 8 is also sent to the CPU 1 via the system bus 28.
It is input to 1. Although not shown, a microphone and a speaker are provided in parallel with the handset 8 for a telephone call during conference communication. During conference communication, the microphone and speaker are used instead of the handset 8 for voice input. Used for output.

FIG. 7 shows an example of the communication controller 25.

In the figure, the ISDN interface circuit 31 is connected to the ISDN, and has a signal processing function of the layer 1 of the ISDN and an integration / separation function of a D channel signal and two B channel signals. , D channel signals are exchanged with the D channel transmission controller 32, and two B channel signals are multiplexed / demultiplexed.
It interacts with the separation device 33.

The LAPD channel transmission controller 32 uses the D
This is for realizing the layer 2 signal processing function of the channel. The multiplexing / demultiplexing device 33 multiplexes data of a plurality of media such as voice and general-purpose data exchanged using the B channel, and CCITT Recommendation H.264. The frame data defined in 221 is formed and transmitted to the line side, and the data of a plurality of media multiplexed in the received frame data is separated. The multiplexer / demultiplexer 33 converts audio data into audio CODE.
It exchanges with the C device 34, and also exchanges general-purpose data of two channels with the LAPB control devices 35 and 36.
It should be noted that this multiplexer / demultiplexer 33 is CCITT Recommendation H.264. When the function of 221 is not used, it functions as a selector that connects the two B channels separated by the ISDN interface circuit 31 to the two LAPB controllers 35 and 36 in an arbitrary manner.

The voice CODEC device 34 is an ISDN B
It is for performing signal conversion processing of analog signal / digital data for transmitting an analog audio signal using a channel. Also, this audio CODEC device 34
Has a conversion function of a data conversion rate of 64 Kbps used during a normal call and a data conversion rate of 56 Kbps used during media multiplexing. The LAPB control devices 35 and 36 are ISDN
This is for realizing the layer 2 signal processing function of the B channel.

Group 3 facsimile modem device 37
Is a group 3 facsimile modem function, and is a low-speed modem function (V.21 modem) for exchanging transmission procedure signals and a high-speed modem function (mainly for exchanging image information). V.33 modem, V.29 modem, V.27ter modem, etc.).

The switch 38 is a voice CODEC device 34.
Is connected to either the handset 8 or the group 3 facsimile modem device 37. In addition, the switch 38 and the multiplexer / demultiplexer 33
The operation of is controlled by the CPU 11.

FIG. 8 shows an example of the display control device 27.

In the figure, a GDC (graphic device controller) 41 controls the contents of the display screen of the liquid crystal display 5, and develops character code data into graphic character data (font data). Various images such as arrangement on bitmap data, image scaling, dot color inversion, drawing of shapes such as lines, circles, ellipses and rectangles, setting of display attributes such as line type of drawing figures, masking of figures, etc. It has a processing function and also controls the display timing of the liquid crystal display display control device 42. Further, the GDC 41 uses the VRAM (video RAM) 43 as a work area. Therefore, the bitmap data of the display image obtained by the processing result is the VRAM.
It is stored in 43. The font ROM 44 stores graphic character data corresponding to each character code data.

The encoding / decoding device 45 encodes and compresses the image signal and also decodes the encoded image information into the original image signal, and performs the encoding / decoding process in the group 3 facsimile mode. It has a function and an encoding / decoding processing function in the group 4 facsimile mode. Also,
The encoding / decoding device 45 uses the VRAM 43 as a work area.

In this way, the VRAM 43 is replaced by the GDC 41
And the encoding / decoding device 45 are shared, the memory required by the display control device 27 can be reduced. Naturally, the memory exclusion / contention control is performed so that the GDC 43 and the encoding / decoding device 45 do not simultaneously access the same address of the VRAM 43.

The liquid crystal display display control device 42 is a VRAM.
The display data is fetched from a predetermined display screen area 43 and displayed on the liquid crystal display 5.

The GDC 41, the VRAM 43, the font ROM 44, and the encoding / decoding device 45 are connected to an internal bus 46, and the exchange of data between these elements is mainly performed via this internal bus 46. Has been.

FIG. 9 shows an example of the hardware and software system configuration of the still image conference apparatus 1. In this case, two group 4 facsimile communication processing systems are provided so that two independent group 4 facsimile communication operations can be performed using two B channels.

In the figure, the LAPD processing unit (LAPD
The driver) 51 drives and controls the LAPD control device 32, and the multiplex communication processing unit 52 performs call control processing relating to the second call (additional call) when two B channels are simultaneously used. The D channel layer 3 processing unit 53 is for performing the call control processing of the layer 3 of the D channel.

Operation control unit (H.221 driver) 54
Is for controlling the operation mode of the multiplexer / demultiplexer 33, and the multiplexer 55 is a CCITT recommendation H.264. 24
It is for controlling two multimedia protocols. The D channel processing unit 56 is for realizing an interface for a call control processing service regarding the D channel and an upper process of the processing service regarding the multiplexing processing.

LAPB processing unit (LAPB driver) 57
Is for driving and controlling the LAPB control devices 35 and 36, and is a group 4 facsimile layer 3 processing section 58, 5
9 is a layer 3 (I
SO standard IS8208) for controlling the processing of the group 4 facsimile layer 4 processing unit 60,
61 is a layer 4 of the group 4 facsimile communication function
(CCITT Recommendation T.70) for controlling the processing, and includes the group 4 facsimile layer 5 processing unit 6
Reference numerals 2 and 63 are for performing processing control of layer 5 (CCITT recommendation T.62) of the group 4 facsimile communication function, and group 4 facsimile upper layer processing units 64 and 65 are upper layers of the group 4 facsimile communication function. It is for performing processing control of a layer function (for example, CCITT recommendation T.521).

The still image conference communication layer 3 processing section 66 is a layer 3 (ISO standard IS820) of the still image conference communication function.
8) for controlling processing, and the still image conference communication layer 4 processing unit 67 controls processing for layer 4 (CCITT recommendation X.224 (class 2)) of the still image conference communication function. The telewriting layer 5 processing unit 68 is for performing processing control of the layer 5 (CCITT recommendation X.225 (full duplex)) of the telewriting communication function, and the telewriting upper layer processing unit 69. Is for controlling the processing of the upper layer of the telewriting communication function.

The conference function layer 5 processing unit 70 is configured to execute the conference function (C &I; Command and Indication).
n) layer 5 (CCITT recommendation X.225 (full duplex)) processing control, and the conference function upper layer processing unit 71 controls the processing of the upper layer of the conference function. Is.

The group 3 facsimile processing section (group 3 facsimile driver) 72 is for controlling the operation of the group 3 facsimile modem 37, and the group 3 facsimile procedure processing section 73 is for the group 3 facsimile transmission procedure processing (CCITT). It is for performing upper layer processing such as Recommendation T.30).

The B-channel processing unit 74 includes a group 4 facsimile communication processing service, a telewriting communication processing service, a conference function processing service, and a group 3 processing.
This is to realize an interface for the upper process of facsimile processing.

In this case, the group 4 facsimile layer 5 processing unit 63 and the still image conference communication layer 4 are arranged so that the bulk transfer operation of the document can be performed during the conference communication.
Data is exchanged between the processing units 67. Therefore, the upper layer transmission procedure of the bulk transfer operation of the document is performed according to the group 4 facsimile transmission procedure.

The call processor 75 has a D channel processor 56.
This is to notify the incoming call detection notification from the upper process (call window application process) and to notify the D channel processing unit 56 of the call request from the upper process.

Facsimile task group 76 is group 4
This is for realizing parallel processing of a plurality of processes of the facsimile communication function and the group 3 facsimile communication function, and requests the D channel processing unit 56 to make a call by a notification from the upper process.

The facsimile processing unit 77 is for processing the processes of the group 4 facsimile communication function and the group 3 facsimile communication function. The D channel processing unit 56 transfers the group 4 facsimile communication function and the group 3 facsimile communication function. Incoming call notification of
This is performed for this facsimile processing unit 77.

The conference processing unit 78 is for processing the process of a still image conference using the conference function, the telewriting function, and the document bulk transfer function, and is also connected to the D channel processing unit 56. Notify each other of incoming and outgoing calls.

The window application processing section 79
To realize user operations in a call application, a facsimile application (a group 4 facsimile application and a group 3 facsimile application), and a conference application (a call application, a telewriting application, a C & I application, and a document bulk transfer application). is there. Also,
The reporting application normally required for the system,
It also includes setting / registration applications and maintenance applications.

The window processing unit 80 is for providing the window application processing unit 79 with a multi-window operating environment processing service.
The input processing unit 81 is for taking in the input coordinate signal from the touch panel control device 26, and the inputted input coordinate signal is the pointing device processing unit 8.
It is input to the window processing unit 80 via 2.

Liquid crystal display controller (liquid crystal display driver)
Reference numeral 83 is for controlling the GDC 41 to rewrite the display content of the liquid crystal display 5 in response to a screen display request from the window processing unit 80.

The clock processing unit 84 is for reading the current time information from the clock device 15 in response to a request from the window processing unit 80 and outputting the current time information to the window processing unit 80. The menu processing unit 85 is for forming the display information of the menu specified by the request from the window processing unit 80 and outputting it to the window processing unit 80.

In this way, the software system is hierarchically structured.

FIG. 10 shows an example of the call control procedure performed by the telephone terminal connected to the ISDN with the ISDN. Therefore, when still image conference apparatus 1 is used as a telephone terminal, this operation is basically performed.

That is, the calling terminal first sets the circuit switching mode as the transfer mode, sends a call setting message SETUP with the destination terminal as the destination to the ISDN, and requests the call setting with the called terminal. Sends a call setup message SETUP to the designated destination terminal to make a call. The ISDN also sends a call setting acceptance message CALL_PROC for notifying the call setting status to the calling terminal.

Upon detection of an incoming call, the called terminal sends a call message ALERT to ISDN when the called terminal is ready to receive a call, and ISDN sends a call message ALERT to the calling terminal to call the called terminal. Notify that it has started.

When the user picks up the handset and responds to the incoming call, the destination terminal sends a response message CONN to ISDN.
The ISDN sends a response message CONN to the calling terminal to notify that the called terminal has accepted the call.

The ISDN also sends a response confirmation message CONN_ACK to the destination terminal to confirm the response of the destination terminal, and at that time, a B channel for data transmission (call) is established between the source terminal and the destination terminal. After the establishment, the call operation using the B channel is appropriately performed between the user of the calling terminal and the user of the called terminal.

When the call ends and the user of the calling terminal returns the handset and goes on hook, the calling terminal sends a disconnection message DISC to ISDN to request release of the B channel, and ISDN releases the release message REL.
To the calling terminal to notify the restoration of the B channel. On the other hand, ISDN sends a disconnection message DISC to request the release of the B channel to the destination terminal, and the destination terminal sends a release message REL to ISDN to notify the restoration of the B channel.

As a result, the calling terminal IS sends the release completion message REL_COMP for notifying the completion of channel disconnection.
In response to the DN, the B channel between the calling terminal and the ISDN is released. At the same time, the ISDN sends a release completion message REL_COMP to the destination terminal to notify the ISDN.
The B channel between the terminal and the destination terminal is released. As a result, the B channel set between the calling terminal and the called terminal is completely released.

In this way, the B channel is set between the source terminal and the destination terminal, data transmission is performed, and when the data transmission is completed, the B channel is released.

Further, each message for ISDN call setup is, as shown in FIG. 11A, a protocol identifier for identifying a protocol specification (format, sequence, etc.) that defines a layer 3 call control message, Call number to identify which call the message pertains to, message type to identify the content of each message, mandatory information elements that must be added to each message, and each message It consists of additional information elements added as required. It should be noted that 0, 1, or a plurality of essential information elements are set according to the message type, and 0, 1, or a plurality of additional information elements are arranged according to the situation.

The call setup message SETUP is, as shown in FIG. 7B, a "transmission capability" as an essential information element.
And the additional information element is, for example, "calling number",
It has information elements such as "Called Number", "Lower Layer Consistency", "Higher Layer Consistency", and "User-User".

The outline of these information elements will be described.

The "transfer capability" information element is an information transfer indicating whether the content of the information to be transmitted is voice, unrestricted digital information, restricted digital information, 3.1 KHz audio, 7 KHz audio, or video. Capability, transfer mode indicating whether the switching function used is circuit switching or packet switching, information transfer speed indicating information transfer speed, information indicating information transfer mode, and information indicating user information protocol, etc. Consists of.

The "calling number" information element is the ISDN of the calling terminal.
Represents the number and the "Called Number" information element is the IS of the called terminal.
Indicates the DN number.

The “Lower layer compatibility” information element is for use in checking the communicability with the partner terminal,
The basic contents are the same as the “Transmission capability” information element. Further, this “low layer compatibility” information element includes, for example, CCITT Recommendation H.264. More detailed contents such as 221 functions are included.

The "higher layer compatibility" information element is for use in a consistency check with the partner terminal. For example, telephone, group 2 / group 3 facsimile, group 4 facsimile, mixed mode, teletex,
Videotex, telex, audiovisual, message handling system, or
The terminal function of the terminal functions such as the still image conference is displayed.

The "user-user" information element is intended to be used to convey information between users, and the contents of this "user-user" information element are transferred transparently without being interpreted by ISDN. It is transmitted to the other user.

FIG. 12 shows an example of a transmission procedure between the group 4 facsimile terminals. In addition, when the still image conference apparatus 1 performs the group 4 facsimile communication operation, this transmission procedure is basically executed. Further, in the bulk transfer operation of the document, of the group 4 facsimile transmission procedure, the transmission procedure of the session layer or higher on the B channel is executed.

When the destination terminal responds to the incoming call, it sends a response message CONN to the ISDN, which causes the ISDN to
Sends a response confirmation message CONN_ACK to the destination terminal to confirm the response of the destination terminal, and at that point, a B channel for data transmission is established between the source terminal and the destination terminal. The destination terminal starts the transmission procedure on the B channel.

First, the calling terminal sends a command SABM to request the setting of the link layer, and the called terminal responds with a response UA, whereby the link layer is set.

Then, the calling terminal sends out the signal SQ in order to set up the network layer end to end,
The destination terminal sends a signal SF to accept it,
Then, the calling terminal sends a signal CR for a calling request, and the called terminal responds with a signal CA to accept the call, whereby the network layer is set.

Then, the calling terminal sends a signal TCR to set the transport layer, and the called terminal sends a signal TCA to accept it, whereby the transport layer is set.

Then, the calling terminal sends a session start command CSS in order to set up the connection of the session layer, and the called terminal responds with a session start positive response RSSP, whereby the session layer is started. ..

Next, the calling terminal sends a document function list command CDCL to negotiate the transmission function to be used, and the called terminal sends a document function list affirmative response RDCLP, thereby receiving the reception capability. Adjustments are made.

When the preparation for image information transmission is completed in this way, the calling terminal starts the document with various information for managing the document information to be transmitted, such as the document reference number for distinguishing the document to be transmitted. Following the command CDS, a plurality of document user information commands CDUI
To send the image information for one document, and when the transmission is completed, send the document end command CDE
Notify the end of the image information of the document.

The destination terminal sends the document end command CD
When E is received, a document end affirmative response RDE indicating that the reception of the document at this time is normally completed
Send P.

When one document includes a plurality of pages, the calling terminal indicates the end of one page when the sending terminal finishes sending the image information of each page except the last page. The CDPB is transmitted, and the destination terminal transmits a document page boundary affirmative response RDPBP indicating that the image information for one page at this time is normally received.

When the transmission of the image information for one document is completed in this way, the calling terminal sends the session end command CSE.
And the destination terminal sends a session end affirmative response RS
Send EP to release the session layer connection.

Then, the calling terminal sends a signal CQ of the network layer, while the called terminal sends a signal CF, whereby the network layer is released, and the calling terminal sends a command of the link layer. DIS
C is sent, and the destination terminal sends a response UA, which releases the link layer.

In this way, when the link (call) on the B channel is released, the calling terminal sends the disconnection message DI
Send SC to ISDN to request release of B channel,
The ISDN sends a release message REL to the calling terminal to notify that the B channel is restored. On the other hand, the ISDN sends a disconnection message DISC to the destination terminal to request the release of the B channel, and the destination terminal sends the release message REL to the ISD.
It is sent to N to notify the restoration of the B channel.

As a result, the calling terminal IS sends the release completion message REL_COMP for notifying the completion of the channel disconnection.
In response to the DN, the B channel between the calling terminal and the ISDN is released. Along with that, ISDN
It sends a release complete message REL_COMP to the destination terminal, which releases the B channel between the ISDN and the destination terminal. As a result, the B channel set between the calling terminal and the called terminal is completely released.

In this way, the B channel is set between the calling terminal and the called terminal, data transmission is performed, and when the data transmission is completed, the B channel is released.

Further, in the still picture conference apparatus, in the B channel, the TTC standard JT-H. 221 (national standard corresponding to CCITT Recommendation H.221) exchanges data in a multi-frame format.

As shown in FIG. 13, one multi-frame MFL includes eight sub-multi-frames SMF1 to SM.
F8, each sub-multiframe SMF1
Each SMF8 is composed of two frames. That is, one multi-frame MFL has 16
It is composed of a number of frames FLM0 to FLM15.

Each frame FLM0 to FLM15
As shown in FIG. 14, each octet is composed of data of 80 octets, and the bit positions in which these octets are arranged in bit order form subchannels SCH1 to SCH8.

The 8th bit of the 1st octet to the 8th octet is the frame synchronization signal (Frame Ali).
The 8th bit of the 9th octet to the 16th octet constitutes a bit rate allocation signal (Bit rate Allocation).
Signal) BAS.

That is, the sub-channel SCH8 is the first
It is allocated to the 8th bit of 7th octet to 80th octet, and this portion is applied channel AC (App).
Sometimes referred to as a license channel). In this still image communication device 1, the sub-channel SCH
Reference numeral 8 is appropriately allocated and used for data transfer of a bulk transfer operation of a document, data transfer of a telewriting communication function, data transfer of a still image conference communication function, and the like.

Further, in the 17th to 24th octets of the sub-channel SCH8, data of an encryption channel for exchanging key information for encrypting the data may be set (optional).

In this way, the frame synchronization signal FAS
8 bits are arranged in one frame FLM0 to FLM15, and the bit allocation is configured in units of multi-frame MFL as shown in FIG.

That is, even frames FLM0, FLM
2, ..., The second to eighth octets of the FLM 14, and the odd frames FLM1, FLM3 ,.
A horizontal synchronization signal composed of an 8-bit data pattern of "001101011" is arranged in the FLM 15, and a vertical synchronization composed of a 6-bit data pattern of "001011" is arranged in the first octet of the odd-numbered frames FLM1, FLM3, ..., FLM11. A sync signal is placed.

By detecting the horizontal synchronizing signal and the vertical synchronizing signal, the synchronization of one multi-frame MFL can be detected.

The 0th frame, the 2nd frame, the 4th frame
Bits N1, N2, N3, N4, N5 of the first octet of the frame, the sixth frame and the eighth frame are used to indicate the multi-frame number. Of these, the bit N5 is used to indicate whether or not the multiframe number is used. Thus, since the data used for the multiframe number is 4 bits, the multiframe number changes in descending order with a value of 0 to 15, and the same multiframe number appears every 16 multiframes.

The tenth frame, the twelfth frame,
And bit L of the 1st octet of the 13th frame
1, L2, L3 are used to display the connection number indicating the order in which the B channels carrying the frame among the currently used B channels are connected. Also, the bit R of the first octet of the fifteenth frame is reserved (reserved) for future recommendation,
The value is set to 0.

The bit TEA of the first octet of the 14th frame is used to indicate that data transmission is impossible due to an internal failure of the data terminal device.

Also, odd-numbered frames FLM1, FLM3,
.., bit A of the third octet of the FLM 15 is used to indicate whether frame synchronization or multi-frame synchronization is established or out of synchronization.

Also, odd-numbered frames FLM1, FLM3
..., bit C1 of the fifth octet, sixth octet, seventh octet, and eighth octet of FLM15
C2, C3 and C4 are for displaying a CRC (Cyclic Redundancy Check) code that is referred to for data error detection (that is, channel quality detection) of two consecutive frames (that is, sub-multiframe). , And the bit E of the fourth octet of the odd frames FLM1, FLM3, ..., FM15 is used to indicate that a transmission error has been detected on the receiving side.

The bit rate allocation signal BAS is, as shown in FIG. 16, even-numbered frames FLM0, FLM2,
.., FLM14, 8-bit data representing the capability BAS or BAS command is arranged, and in the subsequent odd numbered frames FLM1, FLM3 ,.
A double error correction code for error correcting the value of the capability BAS or BAS command transmitted in the immediately preceding frame is arranged.

Further, the transmission of the data of the multi-frame MFL is performed in the order of the frame numbers, and the respective frames FLM0 to FLM15 are transmitted in the octet order from the first octet to the 80th octet as shown in FIG. The first bit of the octet is sent first.

That is, each of the frames FLM0 to FLM0
In the FLM 15, the first bit of the first octet is transmitted first and the eighth bit of the 80th octet is transmitted last.

FIG. 18 is a TTC standard JT-H.264 applied as a transmission control procedure executed when the still image conference apparatus transmits data using the B channel. 242 (national standard corresponding to CCITT Recommendation H.242) shows a general procedure example. In this case, an example of a transmission procedure when exchanging audio data and moving image data between terminals using two B channels is shown.

First, the calling terminal makes a call to the destination terminal and performs a call setup procedure on the D channel to secure one B channel (hereinafter referred to as the first channel) (Phase A). Frame synchronization is performed while exchanging frame data in which PCM audio data (A-law or μ-law, 64 Kbps) is set on one channel (frame mode), and when frame synchronization is established, the mutual BAS capability is established.
Data and command BAS data are exchanged (phase B1-1), the transmission mode to be used at that time is determined, and an additional call setup request for securing the second B channel is started (phase B1-2). ).

Then, in principle, the modes having the highest function in common with each other are selected from the contents of the exchange of the transmission modes at that time (phase B1-3), and the calling terminal receives the selected operation mode. Send a BAS command that specifies the terminal function to operate the function to the calling terminal,
Parameters common to the device functions of the calling terminal and the called terminal are set (phase B2). Thereby, in the first channel, for example, data transmission of audio data (16 Kbps) and data transmission of moving image data (46.4 Kbps) corresponding to the transmission mode selected at that time are performed (phase C). ..

When the first channel starts data transmission in the frame mode, the call setup procedure is performed on the second B channel (hereinafter referred to as the second channel) on the D channel (phase CA), and the second channel is established. Then, frame data including only the frame synchronization signal FAS and the bit allocation signal BAS is exchanged using the second channel to establish frame synchronization and multi-frame synchronization (phase CB1-11), and then the first channel and the second channel. Synchronization between channels is established (phase CB1-12).

When the synchronization of the two B channels is completed, the BAS command is sent from the calling terminal side to set the transmission mode (phase CB1-2), and the transmission mode is switched to the set contents (phase CB1-3). ), Common parameters are set (phase CB3).

When the initialization of the second channel is completed in this way, after that, the frame data exchanged on the first channel and the frame data exchanged on the second channel are synchronized with each other. Using the B channel, audio data and video data are
Transmission rates of 8 Kbps and 76.8 Kbps are assigned for data transmission.

To end such data transmission, first, the second channel is disconnected. At this time, the first
For voice data transmission on the channel only, the procedure for setting the common mode is performed (Phase CD
1), the mode of the second channel is switched to the frame mode 0F (phase CD2). At this time, the first channel and the second channel are asynchronous, and the second channel is in a state in which the call is held in the transmission state of only the frame synchronization signal FAS and the bit allocation signal BAS, and the call of the D channel is disconnected. The call for the second channel is ready to be released by the release procedure.

In the first channel, phase CD1
During the phase CD2, the audio data and the moving image data are transmitted at the total transmission rate of 62.4 Kbps in the frame mode. Further, when the operator of one terminal ends the call, the transmission of the moving image data is ended. In order to use all the transmission capacity of the first channel including the transmission capacity of the moving image data for the audio transmission, the mode is switched to the mode 0F (phase D2), and then the call disconnection release procedure of the D channel is performed. Is ready to be released.

As a result, the call disconnection release procedure is executed on the D channel for the first channel and the second channel (phase E), and the audiovisual transmission between the two terminals is completed.

As described above, in the audiovisual terminal, first, one B channel (first channel) is secured and the frame mode is established, and then, the transmission rates of the audio data and the moving image data are assigned on the first channel. If the second B channel (second channel) can be set at the same time while performing the data transmission in the transitional mode, the second channel is secured by the D channel call setting procedure. And the first transmitting in the transient mode
To synchronize the channel with the newly secured second channel, and when the channel synchronization is established, reset the allocation of the transmission rate of the audio data and the moving image data to utilize the increased transmission capacity of the B channel. In addition, the encoding rules (encoding method) of the audio data and the moving image data are changed so that the audio data and the moving image data of higher quality can be exchanged.

Further, when the data transmission is completed, it is necessary to once change the mode in which the transmission path in which both the first channel and the second channel are synchronized is used to the mode in which only the first channel is used. is there. Therefore, first, each encoding rule of audio data and moving image data is set to a method that optimizes the transmission capacity of the first channel of 62.4 Kbps, and the transmission mode of only the first channel is changed, while the second channel is , The synchronous state with the first channel is stopped, the mode is shifted to the mode 0F where the user data is in the idle transmission state, and the call is disconnected / released by the call disconnection release procedure of the D channel. The first channel is
From two types of media transmission of audio data and video data,
After changing to mode 0F, which is a transmission mode for only voice data, the call is disconnected / released by the D channel call disconnection release procedure.
release. In addition, the first channel, without switching the mode to two types of media transmission of audio data and video data,
It is also possible to disconnect / release the call after directly changing the mode to the mode 0F. In addition, the billing information obtained in the call disconnection / release procedure is managed for each channel.

On the other hand, in general, a still image conference device is
Data transmission is performed using only one B channel, and an example thereof is shown in FIG.

[0124] First, in order for the calling terminal to call the destination terminal, unrestricted digital information is included in the "transmission capability" information element, the ISDN address of the terminal itself is included in the "calling number" information element, and The ISDN address of the destination terminal, H.264 in the "lower layer compatibility" information element. 221 function, and the call setup message SETUP in which the still image conference function is set in the “higher layer compatibility” information element is transmitted, and by this,
Call setting operations are performed between the calling terminal and the ISDN, and between the destination terminal and the ISDN, and the calling terminal and the ISD are set.
B channels are respectively established between N and the destination terminal and the ISDN, whereby a communication path is established between the calling terminal and the called terminal.

When frame synchronization is performed while exchanging frame data in which PCM audio data is set on the established B channel (mode initialization), and when frame synchronization and multi-frame synchronization are established (multi-frame synchronization detection), they are mutually exchanged. Ability BAS data and command B
The AS data is exchanged, and the transmission mode used at that time is determined (transmission mode determination). At this time, 56K
The transmission mode of the voice data of bps and the (general-purpose) data of 6.4 Kbps is set. Using this general-purpose data channel (same as the above-mentioned sub-channel SCH8), C & I mode data other than voice data, for example, C & I function, telewriting communication function, and
Data of the bulk transfer function is exchanged.

Next, the calling terminal transmits a BAS command designating the selected transmission mode to the called terminal, and the transmission mode of the calling terminal and the called terminal is switched (mode switching). Then, parameters common to the device functions such as the encryption mode are set (setting of common parameters), general data is set to be used in MLP (multilayer protocol) (setting of MLP), and further static The video conference mode is set and data transmission in the C & I mode is performed.

When the data transmission in the C & I mode is completed, the MLP is disconnected, the call operation is completed, and after the transmission mode is switched to the mode 0F, the D channel is disconnected / released, and a series of stationary operations are performed. The video conference communication operation ends.

In the C & I mode data transmission, the following conference operation is performed.

First, the conference mode is selected from the following four modes.

(A) Chair mode in which the chair designates the next operator.

(B) Operator nomination mode in which the operator designates the next operator.

(C) Participant nomination mode for registering operation requests in the waiting list.

(D) Free mode in which the operation right (token) is not set.

Next, "meeting start request", "attendance confirmation",
The proceedings such as “call request”, “meeting information retrieval request”, and “meeting status display request” proceed, the telewriting application is activated, and the conference is moved to a conference that refers to common conference materials.

In this telewriting application, "request (cancel, cancel, abandon) operation right (of document)",
The "operation right transfer request", the "document list request", the "document retrieval request", the "document storage request", the "document deletion request", and the "document recording request" are appropriately performed.

When the "leave / participation request" and the "leave leaving permission request" are appropriately made and the "conference end request" is issued, the data transmission in the C & I mode ends.

In this case, although the case where the conference communication is performed using one B channel is shown, the conference communication can be performed using two B channels. In that case, moving picture information can be exchanged using a video input / output port optionally provided in the multiplexer / demultiplexer 33.

With the above configuration, still image conference communication using the still image conference apparatus 1 is performed as follows. In this case, the connection mode of the still image conference communication is point-to-point connection.

First, the user of the still image conference apparatus 1
Using the call function or the facsimile communication function (group 4 facsimile communication function), discuss with the user of the other terminal of the still image conference to perform the still image conference communication, and provide the conference materials used in the still image conference. Send to the other terminal using the group 4 facsimile communication function.

FIG. 20 shows an example of the transmission processing at this time.

When the group 4 facsimile transmission request is received, first, the input screen for inputting the telephone number is displayed to prompt the user to input the destination telephone number (Processing 10
1) Next, an input screen for inputting the material name to be added to the document to be transmitted is displayed, and the user is prompted to input the material name (process 102).

At that time, it is checked whether or not a document is set on the scanner 3 (decision 103), and when the document is not set and the result of the determination 103 is NO, it is requested to set the document. A guidance message is displayed (step 104) to prompt the user to set the original.

When a document is set on the scanner device 3 and the result of the judgment 103 is YES, the scanner device 3 is read and the image of the document set on the scanner device 3 is read and input to obtain the image. The encoded image signal is encoded and compressed by the encoding / decoding device 45, and the magnetic disk device 2
It is temporarily stored in No. 3 (process 105).

Then, the designated destination is called (Processing 1
06), a predetermined call setup procedure process is executed (process 10).
7), the B channel is established (process 108), a predetermined group 4 facsimile transmission procedure is executed, and the accumulated image information is transmitted to the destination terminal (process 109). At this time, the input material name is notified to the destination terminal as the document name of the transmission image information.

When the image information transmission operation is completed, the B channel is terminated (process 110), a predetermined call disconnection recovery procedure is executed to recover the call disconnection (process 111), and a series of image information transmission processes is completed. To do.

Then, the transmitted image information is stored in the magnetic disk device 23 (process 112), predetermined management information is created for the transmitted image information (process 113), and stored in a predetermined area of the magnetic disk device 23. , This process ends.

An example of the management information created at this time is shown in FIG.
1 (a).

This management information is used to appropriately access the transmitted conference information, and ID information for identifying each management information, destination number information for storing the destination of image information, It comprises transmission date / time information for storing the transmission date / time, material name information for storing the set material name, and file number information for storing the file number assigned to this image information at the time of saving.

Further, the destination terminal stores the received image information and also forms and stores the management information as shown in FIG.

This management information is used to appropriately access the received conference information, and stores the ID information for identifying each management information and the destination (sender) who received the image information. File information for storing the recipient's number information for storing the received date and time information, the received date and time information for storing the received document name, the material name information for storing the received document name, and the file number assigned to this image information at the time of saving It consists of number information.

When the conference material is transmitted in this way,
For each conference material, management information for accessing the transmitted conference material is formed and stored in the magnetic disk device 23. Further, in the still image conference apparatus 1 which has received the conference material, management information for accessing the received conference material is formed and stored in the magnetic disk device 23.

When the transmission of the conference material is completed, the user of any one of the still image conference apparatuses 1 makes a conference transmission request to his or her own terminal, and designates and inputs the conference material to be used at that time to perform the conference communication. To call the other terminal to perform.

As a result, as shown in FIG. 22, the calling terminal specifies the still image conference function as the terminal function and arranges the material names of one or more conference materials specified in the "user / user" information element. Call setup message SETUP (AG
C: Material name) is transmitted to the network. As a result, the network sends the call setup acceptance message CALL_PROC to the calling terminal and sends the call setup message SE to the designated called terminal.
Send TUP (AGC; material name).

The called terminal receives the call setup message SE
Analyze the information element of TUP (AGC; material name). In this case, since the material name is placed in the "user / user" information element, for all material names placed in the "user / user" information element, the management information in which the material name is set is set. Check if it is saved. When the management information in which the material name is set is not stored for one or more material names, "User.
A response message CONN (material name) in which one or more material names are placed in the "user" information element is sent to the network. As a result, the network sends a response confirmation message CONN_ACK to the destination terminal and a response message CONN (material name) to the calling terminal.

In this case, since the calling terminal has arranged one or more material names in the "user / user" information element of the received response message CONN, in order to cancel the call connection of the still image conference communication, A disconnection message DISC is sent to the network to terminate the call connection operation at that time.

Next, the calling terminal sets the group 4 facsimile communication function as the terminal function and sends a call setting message SETUP (G4) for calling the same called terminal to the network. As a result, the network sends a call setting acceptance message CALL_PROC to the calling terminal and sends a call setting message SETUP (G4) to the designated called terminal.

After that, the normal call setup procedure is executed to establish the information channel between the calling terminal and the called terminal, and the calling terminal is designated by the called terminal using the established information channel. The conference material having the material name is transmitted to the destination terminal. In addition, during the operation of transmitting the conference material, for example, when a guidance message such as “I am transmitting the insufficient conference material” and an appropriate animation showing the status of the transmission are displayed and output on the liquid crystal display 5. Good.

Upon completion of the operation of transmitting the conference material, the calling terminal again designates the still image conference function as the terminal function, and the material name of one or more conference materials designated in the "user / user" information element. Setting message SET with
UP (AGC; material name) is sent to the network. This allows
The network sends a call setting acceptance message CALL_PRO to the calling terminal.
Along with sending C, a call setup message SETUP (AGC; material name) is sent to the designated destination terminal.

At this time, the destination terminal determines "user / user" of the call setup message SETUP (AGC; material name).
Since the management information in which the material name is set is saved for all the material names placed in the information element,
Send a response message CONN to the network that does not contain the "user-user" information element. As a result, the network sends the response confirmation message CONN_ACK to the destination terminal and the response message CONN to the calling terminal.

In this case, the calling terminal performs the normal call setup procedure because the received response message CONN does not include the "user-user" information element. As a result, an information channel is established between the calling terminal and the called terminal, and the still image conference communication operation similar to that described above is performed using the established information channel.

When the still image conference communication operation is completed, the call between the calling terminal and the network and the call between the destination terminal and the network are independently disconnected and restored, and a series of the static conference communication operation is completed. To do.

On the other hand, at the start of the still image conference communication operation, the user of the destination terminal uses the call function to save the conference material prepared by himself / herself with the user of the source terminal on the source terminal side. Check if there is.

Here, when it is found that the conference material prepared by the user of the destination terminal is not stored in the source terminal side, the user of the destination terminal designates the conference material to be transmitted to the own terminal. Order the transmission of materials.

As a result, the destination terminal sets its own terminal in the bulk transfer mode and instructs the source terminal to the bulk transfer mode. As a result, the calling terminal sets itself to the bulk transfer mode. In this way, when the operation mode of the destination terminal and the source terminal is set to the bulk transfer mode, the destination terminal transmits the designated conference material to the source terminal. As a result, the calling terminal saves the conference material received from the called terminal.

As described above, in this embodiment, when the first call is made with the still image conference communication function specified, the conference material used in the still image conference communication operation is notified from the calling terminal to the called terminal. At this point, when it is found that necessary conference materials are available, the call connection operation is executed as it is to establish the information channel, and the still image conference communication operation is performed using the established information channel.

Further, when it is found that the called terminal has a lack of meeting material at the time of the first call with the still image conference communication function specified, the called terminal is short of the calling terminal. Answer the message name of the meeting material
, And the calling terminal terminates the call connection operation at that point. Then, the calling terminal uses the group 4 facsimile communication function to transmit the notified lacking conference material to the called terminal.

In this way, with all the conference materials required for the destination terminal, the still image conference communication function is specified and the same destination terminal is called again to perform the still image conference communication operation. There is.

Therefore, since the still image communication conference operation can be performed in a state where the conference materials required by the calling terminal are all available on the called terminal side, the proceedings of the still image conference can be smoothly advanced. Further, in this case, since the transmission speed of the information channel can be allotted for transmitting the conference material, the time required for transmitting the conference material can be shortened,
Communication costs can be reduced.

Immediately after the start of the still image conference, the user of the receiving terminal talks with the user of the calling terminal, and the meeting materials that should be prepared and sent by then are saved in the calling terminal. If it is found that the conference material is missing, the bulk transfer function of the still image conference communication function is used to transmit the insufficient conference material from the receiving terminal to the calling terminal. It is possible to avoid such a situation that the transmission operation is performed and the proceedings of the still image conference can be smoothly advanced.

FIG. 23 shows an example of processing when the user performs a call operation by designating the still image conference communication function in the state where the conference material to be used is designated. The operation of designating the conference material can be realized, for example, by displaying and outputting the list of the conference material on the liquid crystal display device 5 and touching the displayed content.

First, the still image conference function is designated as the terminal function, and the material names of all the designated conference materials are set to "user.
Call setup message SETU placed in the "user" information element
P (AGC; material name) is sent to the network to call the destination designated by the user (process 201).

[0172] Next, wait until a response message CONN is received from the network (NO loop of decision 202), and "user / user" in which one or more material names (lacking material names) are placed in the received response message CONN. It is checked whether or not the information element is included (decision 203).

When the result of judgment 203 is NO,
The call setup procedure is continued to establish the B channel (procedure 20).
4) Using the established B channel, the above-described still image conference communication transmission procedure is executed to perform a predetermined still image conference communication operation (process 205). When this still image conference communication operation ends, the B channel is ended (process 206), and a predetermined call disconnection recovery process is executed to disconnect and recover the call (process 20).
7) Then, a series of still image conference communication operations is ended.

Further, the received response message C is received.
"User-user" with missing material names placed in ONN
If the information element is included and the result of determination 203 is YES, a predetermined call disconnection recovery process is executed at that point to recover the call by disconnection (process 208), and the notified insufficient data is transmitted. Job file information is created (step 209), and this operation ends.

FIG. 24 shows an example of the job file information.

This job file information is for managing the transmission operation of the conference material, ID information for identifying each job file information, destination information for storing the transmission destination of the conference material, and designation. It is composed of transmission time information for storing the transmitted transmission time, transmission result information for storing the transmission result, and file number information for storing the file number of the conference material to be transmitted.

In the process 209 described above, the ISDN number of the destination specified when the still image conference communication function of the job file information is called is set in the destination information, the time at that time is set in the transmission time information, and "Transmission" The data representing "standby" is set in the transmission result information, and the file number of the notified lacking material is set in the file number information. At this time, when a plurality of missing material names are notified, a plurality of file number information corresponding to the plurality of material names are arranged.

In the still image conference apparatus 1, the job file information is checked, the transmission result information is set to "standby for transmission", and the content of the transmission time information is set to a time before the current time. If there is one, the group 4 facsimile transmission operation is executed for the job file information. An example of processing at this time is shown in FIG.

First, the group 4 facsimile communication function is set as the terminal function, and the call setting message SETUP (G4) in which the content of the destination information of the job file information is set in the "destination number" information element is sent to the network to set the destination. A call is made (process 301) and a predetermined call setup procedure is executed (process 3).
02), B channel is established (process 303).

Then, using the established B channel, a predetermined group 4 facsimile transmission procedure operation is executed, and the conference material having the file number set in the file number information of the job file information is transmitted to the destination terminal. (Process 305).

When the transmission of the conference material is completed, the B channel is terminated (process 306), a predetermined call disconnection recovery process is executed to recover the call disconnection (process 307), and the data representing the transmission result at that time is collected. The transmission result information of the job file information is set (process 308), and the series of group 4 facsimile communication operation is ended.

When the operation of transmitting the conference material is completed in this way, the still image conference communication operation similar to that described above is executed again.

FIG. 26 shows a processing example of the still image conference apparatus 1 when an incoming call is detected.

When the call setup message SETUP is received from the network, the contents are analyzed (process 401) and it is checked whether or not the own terminal is connectable (decision 402). When the result of determination 402 is NO, the incoming call is ignored (process 403) and the communication standby state is returned to.

When the result of judgment 402 is YES, it is checked whether or not the still image conference function is designated as the terminal function (decision 404). The result of judgment 404 is Y
When it becomes ES, it is checked whether or not the "user / user" information element in which the material name of the conference material is arranged is included (decision 405), and when the result of judgment 405 is YES, all the notified It is checked whether or not the conference material having the material name is stored by referring to the management information regarding the received conference material information (decision 406).

When the result of the judgment 406 is YES, a normal response message CONN is returned (process 4
07), the B channel is established (process 408), the still image conference communication transmission procedure described above is executed using the established B channel, and a predetermined still image conference communication operation is performed (process 409). When this still image conference communication operation is completed, the B channel is terminated (process 410), a predetermined call disconnection recovery process is executed to disconnect and recover the call (process 411), and a series of still image conference communication operations is completed. ..

If the "user / user" information element in which the material name of the conference material is arranged is not included and the result of the determination 405 is NO, the process moves to the process 407 and the subsequent processes. To execute.

Further, when all the conference materials notified from the calling terminal are not stored and the result of judgment 406 is NO, the lacking material name is placed in the “user / user” information element. The response message CONN (material name) is returned (process 412), and a predetermined call disconnection recovery process is executed to disconnect and recover the call (process 413). Also, the judgment

When the still image conference function is not designated as the terminal function but when the result of judgment 404 is NO, it is checked whether the group 4 facsimile function is designated as the terminal function (decision 414). When the result of determination 414 is YES, a predetermined group 4 facsimile incoming call process is executed. Also, the judgment 40
When the result of 4 is NO, it means that the telephone function is designated as the terminal function, so that the incoming call process is executed.

FIG. 27 shows an example of the group 4 facsimile incoming call processing.

First, the response message CONN is returned (process 501) to establish the B channel (process 50).
2). Then, using the established B channel, a predetermined group 4 facsimile reception procedure operation is executed to receive the conference material and store it in the magnetic disk device 23 (process 503).

When the reception of the conference material is completed, the B channel is terminated (process 504), a predetermined call disconnection recovery process is executed to recover the call disconnection (process 505), and one or more received at that time are received. With respect to the conference material, the above-described management information is created and stored (process 506), and the series of group 4 facsimile communication operation is ended.

Now, while the still image conference transmission procedure is being executed, when the user issues an instruction to transmit the conference material, the processing shown in FIG. 28 is executed.

First, for example, a list of conference materials is displayed and output on the liquid crystal display 5, and a transmission material selection input process (process 601) for touching the displayed contents is executed to select the conference material to be transmitted to the user. Let

Next, command data for instructing to switch the communication mode to the bulk data transfer mode is sent to the partner terminal (step 602), and the communication mode of the self terminal is switched to the bulk data transfer mode (step 602). Processing 60
3).

Then, the designated conference material (bulk data) is transmitted to the partner terminal via the sub-channel SCH8 using the group 4 facsimile transmission procedure (layer 5 (session layer) or higher) (process 604). When the operation of transmitting the conference material is completed, the communication mode is restored to the original mode (process 605), and the operation of transmitting the conference material in the bulk data transfer mode is completed.

Further, when the command data for instructing to switch the communication mode to the bulk data transfer mode is received from the partner terminal during the still image conference transmission procedure, the processing shown in FIG. 29 is executed. To do.

First, the communication mode of the self terminal is switched to the bulk data transfer mode (process 701). Then, the conference material (bulk data) is received via the sub-channel SCH8 using the group 4 facsimile transmission procedure (layer 5 (session layer) or higher) (process 702).

When the operation of receiving the conference material is completed, the received conference material is stored in the magnetic disk device 23, and the management information regarding the conference material is formed and stored (process 70).
3) Restore the communication mode to the original mode (process 70).
4) The reception operation of the conference material in the bulk data transfer mode is completed.

As described above, according to this embodiment,
During the call setup procedure for still image conference communication operation, if it is found that the conference materials used in the still image conference communication are not available, the call setup procedure is aborted and the missing conference material Therefore, when actually starting the still image conference communication, the conference materials to be used are in a complete state, and the proceedings of the still image conference can be smoothly proceeded.

If it is found that the conference material is insufficient during the still image conference communication operation, the bulk data transfer operation using the sub-channel SCH8 is performed to transmit the conference material. It is possible to hold a call for conference communication and smoothly proceed with proceedings of a still image conference.

By the way, in the above-mentioned embodiment, the case where the conference material is transmitted in advance and the still image conference communication operation is performed has been described, but the present invention is similarly applied to the case where the conference material is transmitted as necessary. Can be applied.

Further, in the above-mentioned embodiment, the case where the conference material stored in advance in the magnetic disk device is used as the conference material transmitted during the still image conference communication operation is explained. However, at the time of transmission, it is read from the scanner device. It is possible to input or use conference materials drawn by a telewriting application.

Further, in the above-described embodiment, during the call setup procedure for the still image conference communication operation, the call setup message SETUP and the response message CONN are displayed in order to confirm the conference material used in the still image conference communication. I am using
Other signals can also be used.

[0205]

As described above, according to the present invention,
The terminal device participating in the still image conference communication can determine the conference material necessary for the still image conference at the time of the call setup of the still image conference communication or immediately after the call setup, and start the proceedings of the still image conference. Since the necessary meeting materials can be confirmed in the previous stage, it is possible to avoid the situation where the lack of meeting materials is found during the proceedings of the still image conference and the proceedings are temporarily interrupted. obtain.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a still image conference apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a telewriting communication function.

FIG. 3 is a schematic diagram for explaining a multi-window operating environment.

FIG. 4 is a schematic diagram showing an example of a telewriting application screen.

FIG. 5 is a schematic diagram for explaining designation of coordinates in the telewriting communication function.

FIG. 6 is a block diagram showing a configuration example of the apparatus of FIG.

FIG. 7 is a block diagram showing an example of a communication control device.

FIG. 8 is a block diagram showing an example of a display control device.

9 is a block diagram showing a hardware and software system configuration of the apparatus of FIG.

FIG. 10 is a time chart showing an example of call control of a telephone terminal using ISDN as a transmission path.

FIG. 11 is a schematic diagram showing an example of a signal format of a signal for call control.

FIG. 12 is a time chart showing an example of a transmission procedure of a group 4 facsimile apparatus using ISDN as a transmission path.

FIG. 13 is a schematic diagram showing an example of a frame configuration of a multiframe.

FIG. 14 is a schematic diagram showing an example of a signal configuration of one frame.

FIG. 15 is a schematic diagram showing an example of a frame adjustment signal.

FIG. 16 is a schematic diagram showing an example of a bit allocation signal.

FIG. 17 is a schematic diagram for explaining a signal transmission order.

FIG. 18: TTC recommendation JT-H. 242 (a domestic standard corresponding to CCITT Recommendation H.242) is a time chart showing an example of a general procedure.

19 is a time chart showing an example of a transmission procedure executed by the device of FIG.

FIG. 20 is a flowchart showing a processing example when a group 4 facsimile transmission request is received.

FIG. 21 is a schematic diagram showing an example of a list display screen of link information, management information, and meeting material.

FIG. 22 is a time chart showing an example of a transmission procedure when conference material is insufficient.

FIG. 23 is a flowchart showing a processing example when a user performs a call operation by designating a still image conference communication function in a state of designating conference material to be used.

FIG. 24 is a schematic diagram showing an example of job file information.

FIG. 25 is a flowchart showing a processing example of a group 4 facsimile transmission operation.

FIG. 26 is a flowchart showing a processing example when an incoming call is detected.

FIG. 27 is a flowchart showing an example of group 4 facsimile reception processing.

[Fig. 28] When executing the still image conference transmission procedure,
The flowchart which shows the example of a process performed when transmission of a meeting material is instructed from a user.

[Fig. 29] When executing a still image conference transmission procedure,
The flowchart which shows the example of a process performed when the command data instructing to switch the communication mode to the bulk data transfer mode is received from the partner terminal.

Claims (8)

[Claims] 1. A call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, a still image conference function for proceedings, and In a method of controlling a still image conference device that has a document storage function for storing document information such as conference materials, the identification information of the conference materials used in the conference communication at that time after the call connection in the still image conference communication mode is performed. A method for controlling a still image conference device, characterized by exchanging mutually. 2. The method of controlling a still image conference apparatus according to claim 1, wherein the identification information of the conference material is exchanged by using a procedure signal exchanged on an information channel. 3. A call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, a still image conference function for proceedings, and In a method of controlling a still image conference device that has a document storage function for storing document information such as conference materials, when the call connection is made in the still image conference communication mode, the identification information of the conference materials used in the conference communication at that time is displayed. A method for controlling a still image conference device, characterized by exchanging mutually. 4. The still picture conference apparatus according to claim 3, wherein the identification information of the conference material is exchanged by using a predetermined information element of a call control signal exchanged on a signal channel. Control method. 5. A call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, a still image conference function for proceedings, and In a method of controlling a still image conference device equipped with a document storage function for storing document information such as conference material, the calling terminal is a conference material used in the conference communication at that time when calling in the still image conference communication mode. Identification information to the called terminal, and when the called terminal does not save the meeting material notified when an incoming call in the still image conference communication mode is detected, that fact and the identification of the missing meeting material are identified. When the calling terminal sends a response message containing the missing material information that represents the information, and the calling terminal receives the response message with the missing material information added, the call is disconnected and restored at that point. After that, the conference material notified by the above-mentioned insufficient material information is transmitted to the same destination terminal using the facsimile communication function, and then the same destination terminal is called in the still image conference communication mode. A method for controlling a picture conferencing apparatus. 6. A call function, a facsimile communication function for transmitting and receiving conference materials, a telewriting communication function for appropriately drawing still images such as conference materials, a still image conference function for proceedings, and , In the control method of the still image conference device that has the document saving function to save the document information such as conference material, when the transmission of the conference material is specified after the call connection in the still image conference communication mode, the specification is received. The designated terminal, which has been used at that time, allocates the general data transfer subchannel allocated to the currently established information channel for use in transferring the conference material, and after notifying the partner terminal of the information indicating that, The specified conference material is transferred to the partner terminal via the transfer sub-channel, and the partner terminal transfers the general data from the specified terminal. When it is notified that the conference material will be used for conference material transfer, the transfer subchannel will be used for conference material transfer and the conference material received through the transfer subchannel will be saved. A control method of a still image conference device characterized. 7. The method of controlling a still image conference apparatus according to claim 6, wherein the conference material transmitted from the designated terminal to the partner terminal is formed after a call is connected. 8. The still image conference according to claim 6, wherein the conference material transmitted from the designated terminal to the partner terminal is formed prior to call connection and stored in the designated terminal. Device control method.