JPH06189050A - Telewriting communication terminal - Google Patents

Abstract

PURPOSE:To confirm the display area of a main body display part at a large screen display device, to facilitate scroll operations and to eliminate useless operations by displaying a frame line while framing the display area of the display part on the display screen of the large screen display device with an external display control part. CONSTITUTION:A large screen display 25 is the large screen display device externally connected to a telewriting communication terminal 100 and provided with a picture size larger than that of a display unit 22. On the other hand, an external display control part 26 performs the enlargement/reduction of display contents or the picture control of a multiwindow to the large screen display 25 connected outside. In this case, as the external indication control part, the external display control part 26 displays the much wider area including the area displayed on the display 22 on the large screen display 22 and displays the frame line while framing the display area of the display 22 on the display screen of this large screen display 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telewriting communication terminal for transmitting and receiving handwritten input data (telewriting data) as well as multimedia data such as still images and moving images in addition to voice data, and more particularly to a teleconferencing system or a multi-media system. The present invention relates to a telewriting communication terminal used for media communication systems and the like.

[0002]

2. Description of the Related Art Conventionally, a telewriting communication terminal that handles handwritten input data together with voice data has been widely used. This telewriting communication terminal is provided with a display section for displaying various multimedia data including handwritten input data. ing. Although this display unit displays data, it also displays operational icons and messages. For this reason,
For example, if there is a conference participant other than the operator in front of the terminal,
Icons and messages are displayed as unnecessary display data for these conference participants. Therefore, in order to display only the regular communication data excluding the display data in operation,
The display device may be externally connected.

As a conventional telewriting communication terminal of this type, there is one described in, for example, Japanese Patent Laid-Open No. 3-157047, and by displaying only the screen of the data portion on an externally connected display device, The display is easy to see even if there are multiple people near one terminal. Also,
It has also been proposed to use an externally connected display device having a larger screen than the screen size of the display unit of the terminal to display the same image on an enlarged scale.

[0004]

However, in such a conventional telewriting communication terminal, the data display area remains the same even if the screen of the externally connected display device is enlarged. Only the same image as the copy was enlarged, and a larger area could not be displayed.

Therefore, according to the first aspect of the invention, a wide area is displayed on the externally connected display device, and the display area of the terminal is indicated by a frame line in the wide area so that the display area of the terminal is displayed on a large screen. The purpose is to provide a telewriting communication terminal that can be confirmed at. In addition, claim 2
According to the invention described above, by displaying a handwriting input area in a wide area of an externally connected display device and indicating the area with a frame line, a display area corresponding to the handwriting input area can be confirmed on a large screen. It is intended to provide a writing communication terminal.

According to the third aspect of the present invention, a plurality of handwriting input sections are made to correspond to a plurality of input areas, each input area is displayed on an externally connected display device, and each area is indicated by a frame line. It is an object of the present invention to provide a telewriting communication terminal capable of facilitating collaborative work by a handwriting input person. In the invention according to claim 4, the handwriting areas can be easily specified by differentiating the frame lines on the large screen showing the respective input areas corresponding to the plurality of handwriting input sections. , The purpose of the present invention is to provide a telewriting communication terminal capable of facilitating collaborative work by a plurality of handwriting input persons.

According to the invention of claim 5, each handwriting area is displayed on an externally connected display device corresponding to a plurality of terminals connected at multiple points, and each area is indicated by a frame line. , It is an object of the present invention to provide a telewriting communication terminal capable of facilitating collaborative work by handwriting input of a plurality of terminals.

[0008]

The invention according to claim 1 is
In order to achieve the above object, a display unit for displaying various multimedia data including handwritten information, and a handwritten information input unit for inputting handwritten information corresponding to the display area of the display unit are provided, and the display unit is provided. In a telewriting communication terminal externally connected to a large screen display device having a screen size larger than the screen size, a wider area including the area displayed on the display unit is displayed on the large screen display device. In addition, an external display control unit is provided for displaying a frame line on the display screen of the large screen display device by framing the display area of the display unit.

In order to achieve the above-mentioned object, the invention according to claim 2 inputs a handwriting information corresponding to a display unit for displaying various multimedia data including handwriting information and a display area of the display unit. And a handwriting information input section for performing handwriting information input, and having a screen size larger than the screen size of the display section, and externally connecting a large-screen display device for displaying handwriting information input from the handwriting information input section. In the communication terminal, the handwriting information input from the handwriting information input unit is displayed on the large screen display device in correspondence with the screen size of the display unit, and the handwriting information is displayed on the display screen of the large screen display device. It is characterized by comprising an external display control unit for framing a region and displaying a frame line.

In order to achieve the above-mentioned object, the invention according to claim 3 is the telewriting communication terminal according to claim 2, wherein a plurality of handwriting information input sections are provided, and the handwriting information input section inputs data. The handwriting information is displayed on the large screen display device, and a frame line is displayed on the display screen of the large screen display device by framing the display area of each handwriting information.

In order to achieve the above object, the invention according to claim 4 is characterized in that, in the telewriting communication terminal according to claim 3, a frame line is displayed in a discriminative manner corresponding to each handwritten information input section. And Further, in order to achieve the above object, the invention according to claim 5 is the telewriting communication terminal according to claim 2, wherein each terminal including its own terminal when multipoint connected with at least one or more partner terminals. Characterized by displaying handwritten information input from the handwritten information input unit provided on the large screen display device and displaying a frame line on the display screen of the large screen display device by framing the display area of each handwritten information. And

[0012]

According to the present invention having the above-mentioned structure, a wider area including the area displayed on the main body display section is displayed on the externally connected large screen display device, and then the external display is displayed. The control unit displays a frame line on the display screen of the large screen display device by framing the display area of the display unit.

Further, in the invention having the above structure, the handwriting information input from the handwriting information input unit corresponding to the screen size of the main body display unit is displayed on the externally connected large screen display device. Then, the external display control unit displays a frame line on the display screen of the large screen display device by framing the display area of the handwritten information. In the invention according to claim 3 having the above configuration, when a plurality of handwriting information input units is provided, the handwriting information input from each handwriting information input unit is displayed on the large screen display device, and A frame line is displayed on the display screen of the screen display device by framing the display area of each handwritten information.

Further, in the invention having the above-mentioned structure, the frame line is displayed differently corresponding to each handwritten information input section. In the invention according to claim 5 having the above configuration, when multi-point connection is made with at least one or more partner terminals, the handwriting information input from the handwriting information input unit included in each terminal including the self terminal is displayed. While displaying on a large screen display device, a frame line is displayed on the display screen of this large screen display device by framing the display area of each handwritten information.

[0015]

EXAMPLES The present invention will be described below based on examples.
FIG. 1 is a block diagram showing a telewriting communication terminal according to an embodiment of the invention described in any of claims 1 to 5. Note that the device of the present invention includes a teleconferencing system having a telewriting communication function, a multimedia communication terminal device, and the like, but here, a voice communication, a telewriting communication, and a facsimile communication for transmitting and receiving a document image are performed. A possible device will be described as an example.

First, the structure will be described. In the figure, 10
Reference numeral 0 is a telewriting communication terminal of the present embodiment, and the system control unit 11 controls each unit of this device according to a program in a ROM (Read Only Memory) 12. ROM
Reference numeral 12 stores a control program for this apparatus, and R
An AM (Random Access Memory) 13 stores various data necessary for controlling the device. The image memory 14 temporarily stores the image data read by the scanner 15 of the present apparatus or the image data received from the partner terminal. The communication control unit 16 includes a handset (so-called handset) 1
7, a microphone 18, a speaker 19, etc. are connected and include a voice codec for A / D converting a voice signal, and control voice communication and also control and execute telewriting communication.

The encoding / decoding unit 20 uses the MH (Modified Huffman) and MR (Modified REA) that are used in facsimile communication for the image data input from the scanner 15.
D), encoding by MMR (Modified Modified READ), etc., or decoding image data received from the partner terminal. The operation unit 21 includes a ten-key pad for an operator to input a destination telephone number, various operation keys for moving the display area of the display 22, editing instructions, etc., or a switching key for switching ownership of a telewriting token (control right). Prepare The scanner 15 is a CCD (Charge Coupled
Device) to read a document line by line and output it as image data.

The drawing input unit 23 is a handwriting information input unit of this embodiment, and is composed of a tablet and its control unit,
The position where the dedicated pen tip touches is detected and the position information is captured. The display unit 22 is a CRT or L
A display (display unit) including a CD and a display control unit for controlling the display are included, and the display control unit performs screen control such as enlargement / reduction of display contents and multi-window. The display area of the display unit 22 and the input area of the drawing input unit 21 (tablet)
The handwriting information input through the drawing input unit 21 is displayed on the display 22 in real time. The VRAM 24 stores the display data of the display unit 22 and the large screen display 25.

The large screen display 25 is a large screen display device externally connected to the telewriting communication terminal 100, and has a screen size larger than the screen size of the main body display 22. External display controller 26
Is for the large screen display 25 connected to the outside,
Enlarges / reduces display contents and controls screens such as multi-window. In addition, the telewriting communication terminal 1 of the present embodiment
00 connects each of the above-mentioned components by the system bus 27, and is connected to the digital line L such as an ISDN line or a dedicated line via the communication control unit 16.

Here, the structure of the invention according to claim 1 will be described. The external display controller 26
The external display control unit of this embodiment displays a wider area including the area displayed on the display 22 on the large screen display 25, and displays the larger area on the display screen of the large screen display 25. The display area of the display 22 is bordered to display a frame line.

Next, the operation will be described. FIG. 2 is a system configuration diagram of a communication system configured by connecting a plurality of telewriting communication terminals at multiple points. In the figure, each of the telewriting communication terminals 100a to 100c has an ISD.
It is connected to N line or leased line L, and MCU (Mult
An ipoint Control Unit) 31 controls communication between multiple points. In addition, here, ISD such as ISDN exchange
The inside of N is omitted.

In the telewriting communication by the terminals 100a to 100c, OSI (Open
In accordance with the reference model of Systems Interconnection), there is a telewriting application in the upper layer of layer 5. FIG. 3 is a diagram showing an example of a protocol sequence in Layer 5. In this figure, the layer 5 connection to the data transfer phase are shown, and the steps after the communication termination procedure are omitted. In addition, in the present embodiment, half-duplex communication is performed.

First, this protocol sequence will be described. When an operator performs a call operation to perform telewriting communication, an application of the calling terminal issues a connection request to layer 5, and layer 5 of the calling terminal uses CN (connect) to connect between peer layers. ) S
The PDU (Session Protocol Data Unit) is passed to the other terminal. The CN SPDU contains information for half-duplex communication. On the other hand, when an AC (accept) SPDU is returned from the partner terminal (incoming terminal), telewriting communication is enabled, and the operator performs a telewriting communication start operation. As a result, AS (activi
ty start) The SPDU is passed to the partner terminal, and handwriting input data (drawing data) and screen control data can be transmitted and received.

The drawing data and the screen control data are DT.
(Data transfer) Transferred to the other terminal by SPDU. However, these data can be transmitted only from the terminal that has the token (control right), and cannot be transmitted from the terminal that does not have the token. Since the token is initially given to the calling terminal, if you want to send drawing data from the called terminal, pass the PT (Please tokens) SPDU from the called terminal to the calling terminal to request token acquisition. To do. When the calling terminal receives the PT SPDU, it sends a GT (give token) to transfer the token.
s) Pass the SPDU. Upon receiving the GT SPDU, the called terminal can transmit drawing data and screen control data. For the first time in this state, from the called terminal to the calling terminal,
Drawing data and screen control data can be transmitted by being carried on the DT SPDU. Incidentally, the called terminal that has completed the data transmission promptly returns the token to the calling terminal.

FIG. 4 is a diagram showing a display example of a large screen display and a main body display externally connected to the telewriting communication terminal of FIG. In the present embodiment, the number of display pixels of the externally connected large screen display 25 is 180.
It is assumed that the display 22 of the main body has 0 × 1200 pixels and the number of display pixels is 640 × 400 pixels. As shown in the figure, the data displayed in the display area of the display 22 of the main body corresponds to a part of the data displayed in the display area of the externally connected large screen display 25. Will be displayed on the large screen display 25.

FIG. 5 is a diagram showing the display data area in the VRAM of FIG. 1, and shows the correlation between the display data areas of the two displays shown in FIG. As shown in FIG. 5, the data areas displayed on the two displays 22 and 25 are managed on the VRAM 24. For example, the data area 51 for the large screen display 25 corresponds to one page, and the data area 52 for the display 22 of the main body is represented by the relative position within this page. That is, the large screen display 2
If the upper left apex of the data area 51 for 5 is Q, the upper left apex P of the data area 52 for the display 22 of the main body.
The coordinate of is represented by (x, y), where x is the number of pixels in the X-axis direction from the point Q and y is the number of pixels in the Y-axis direction. It is assumed that there is a virtual cursor at the position of point P, and the operator moves the virtual cursor to display 22 on the main body.
The data area 52 for is moved. That is, if it moves to the right, the display screen of the main body display 22 is scrolled to the right.

Then, the frame line 41 shown in FIG. 4 is displayed on the large screen display 25 based on the coordinate value (x, y) of P in the data area 52 for the main body display 22.
The position information of the display area of the main body display 22, that is, the position information of the frame line 41 is also sent to the partner terminal. When the own terminal is the calling terminal and the other terminal is the called terminal, the other terminal can display the same frame line display as the calling terminal on its own large-screen display 25 according to the received position information. Therefore, the called terminal can recognize the display area of the main body display 22 of the calling terminal even when the main body display 22 of the called terminal displays an area different from that of the calling terminal. At this time, since the display area of the main body display 22 of the call receiving terminal and the display area of the main body display 22 of the calling terminal can be displayed individually or simultaneously as a frame line, the difference between the display areas of the receiving terminal and the other display areas can be recognized at a glance. can do. With respect to the position information of the frame line display, the display area of the main body display 22 of the called terminal can be confirmed in real time even on the calling terminal side by allowing transmission without a token.

As described above, in this embodiment, the area displayed on the main body display 22 of the telewriting communication terminal 100 is displayed as a frame on the large screen display 25 having a wider display area.
The second display area can be confirmed on the large screen display 25. For example, when changing the display area of the main body display 22, the scroll destination can be easily identified, and useless operation can be prevented. Further, since the display area of the partner terminal can be known, the operation of the partner operator can be confirmed.

The invention according to claim 2 will be described below based on embodiments. First, the configuration will be described. In FIG.
The handwritten information input from the drawing input unit 23 can be displayed on the main body display 22, but can also be displayed on the large screen display 25 at the same time. At this time, the external display control unit 26, as the external display control unit of the present embodiment, displays the handwritten information input from the drawing input unit 23 on the large screen display 25 in correspondence with the screen size of the main body display 22. . The display example at this time is similar to that shown in FIG. 4, and handwritten information is displayed on the main body display 22 at a position corresponding to the input position of the drawing input unit 23. On the other hand, on the large screen display 25, a frame line 41 is displayed so as to border a display area corresponding to the input area of the drawing input unit 23 (that is, the display area of the main body display 22). The frame display of the input area of the drawing input unit 23 is also controlled by the external display controller 26. While watching the display screen of the large screen display 25,
By scrolling the input area of the drawing input unit 23, the frame line 41 can be moved to an arbitrary position in the display area of the large screen display 25, and handwritten information can be input and displayed. In this case, the display area of the main body display 22 also changes in association with the scrolling of the input area of the drawing input unit 23.

Next, the operation will be described. The display position of the drawing input area on the large screen display 25 is managed on the VRAM 24 as in the case of the main body display 22. That is, as shown in FIG. 5, the data area 51 for the large screen display 25 is divided by one page, and the drawing input data area 52 is represented by the relative position of this page. The operator operates the movement key of the drawing input area provided on the operation unit 21 or the drawing input unit 23 to move the drawing input area 52. This drawing input area 52
Is displayed on the externally connected large screen display 25 with a rectangular frame 41, and its position information is also sent to the other terminal, and the drawing input area of the own terminal is displayed on the large screen connected to the other terminal. A rectangular frame 41 is displayed on the display 25. Conversely, the drawing input area of the other terminal can also be displayed on the large screen display 25 of the next terminal with a rectangular frame line.

As described above, in the present embodiment, the large-screen display in which the handwriting input area of the telewriting communication terminal 100 (the number of display pixels of the display included in the area) is larger than that (the number of pixels) is displayed. 25
Since it is displayed as a rectangular frame line 41 on the screen, the handwriting can be input while checking the handwriting input area of the telewriting communication terminal 100 on the large screen display 25, and the operability can be improved. Further, since the handwriting input area of the partner terminal can be known, the operation of the partner operator can be confirmed.

The invention according to claim 3 will be described below based on embodiments. FIG. 6 is a block diagram showing a telewriting communication terminal according to an embodiment of the present invention. In addition, in the present embodiment, regarding the same configuration as the above example,
The same reference numerals are given and the detailed description thereof is omitted. First,
The configuration will be described. In FIG. 6, the telewriting communication terminal 100 includes a plurality of drawing input units 23 a, 2
3b, ... Are provided. In the present embodiment, when the handwriting information input from each drawing input unit 23a, 23b, ... Is displayed on the large screen display 25, each drawing input unit 23a, 23b ,. The display area of is bordered and a plurality of frame lines are displayed.

Next, the operation will be described. FIG. 7 is a diagram showing a display example of a large screen display corresponding to a plurality of drawing input units. In the case of the present embodiment, as shown in FIG. 6, there are a plurality of drawing input units 23. The drawing input areas of the drawing input units 23a, 23b, ...
As shown in FIG. 7, the images are displayed on the screen of the large screen display 25 at positions surrounded by rectangular frame lines 41a, 41b ,. The display position of the drawing input area on the large screen display 25 is managed on the VRAM 24 as in the above-described embodiment. That is, the data area for the large screen display 25 is taken for one page, and the drawing input area is represented by the relative position of this page. Each drawing input unit 23 is provided with a drawing input area movement key, and the operator operates this to move the drawing input area. The drawing data input from each drawing input unit 23 is displayed on the large screen display 25 connected to its own terminal, and also sent to the partner terminal and displayed on the partner's large screen display. On the contrary, it is possible to display a plurality of drawing input areas of the partner terminal on the large screen display 25 of the own terminal.

The drawing input areas shown in FIG. 7 are displayed at positions separated from each other, but depending on the setting of the input areas, the drawing input areas can be displayed at the positions where the frame lines 41 intersect or at the overlapping positions. is there. Further, when the drawing input areas overlap, even if the area positions are the same, as shown in FIG.
They may be displayed at different positions on the screen of the large screen display 25.

As described above, in the present embodiment, when a plurality of drawing input units 23 are connected to one telewriting communication terminal 100, the input area for each unit is framed on the screen of the large screen display 25. Since it is displayed, even if the drawing input area is moved for each unit, its positional relationship can be grasped, and the joint work of drawing input by a plurality of conference participants can be facilitated.

The invention according to claim 4 will be described below based on embodiments. First, the configuration will be described. 6, when the telewriting communication terminal 100 includes a plurality of drawing input units 23a, 23b, ..., As shown in FIG. 7, the drawing input units 23a, 23b ,. The frame lines 41a, 41b, ... Showing the regions are displayed differently. FIG. 7 shows an embodiment in which the line type is differentiated, and in the case of a color display, it is also possible to differentiate the color type. Further, a symbol or the like for identifying the drawing input unit 23 may be displayed on a part of the frame line 41.

Next, the operation will be described. In FIG. 7, the type, color, and the like of the rectangular frame line 41 representing the drawing input area displayed on the large screen display 25 are made different in correspondence with each drawing input unit 23. Each conference participant who operates the drawing input units 23a, 23b, ... While checking his or her drawing input area on the large screen display 25, moves his or her drawing input area to an arbitrary display area to write handwritten information. input. In the present embodiment, it is assumed that the display area of the main body display 22 is set in association with any one of the drawing input units 23a, 23b, ...

As described above, in this embodiment, the type, color, etc. of the rectangular frame line 41 representing the drawing input area are displayed differently on the large screen display 25 in association with each drawing input unit 23. Therefore, the collaborative work of handwriting input by a plurality of conference participants can be facilitated. Hereinafter, the invention according to claim 5 will be described based on examples.

First, the structure will be described. As shown in FIG. 2, when the calling terminal 100a makes a multipoint connection with at least one or more partner terminals 100b and 100c, input is performed from the drawing input unit 23 (see FIG. 1) included in each terminal including the own terminal. The written handwritten information is displayed on the large-screen display 25 of the own terminal. Then, on the display screen of the large screen display 25, as shown in FIG. 7, frame lines 41a, 41b, 41c are displayed by framing the display area of each handwritten information.

Next, the operation will be described. As shown in FIG. 2, when communicating between a plurality of terminals via the MCU 31,
Large screen display 2 for each person's drawing input area
5 is indicated by a rectangular frame line 41. Information about the drawing input area is transmitted and received in the DT SPDU described in FIG. 3, and a coding example is shown in FIG. Terminal 10
0a displays the drawing input area received from the plurality of partner terminals 100b and 100c on the large screen display 25 with rectangular frame lines 41b and 41c as shown in FIG. However, 41a in the drawing is a frame line indicating the drawing input area of the own terminal, A is an identification symbol of the own terminal, and B and C are identification symbols of the other terminal. When displaying the received drawing input areas 41b and 41c, the data is managed on the VRAM 24 as shown in FIG.

In the present embodiment as well, as shown in FIG. 7, the drawing input areas are displayed at positions separated from each other, but depending on the setting of the input areas, even at the positions where the frame lines 41 intersect, It can also be displayed at overlapping positions.
Further, when the drawing input areas overlap, even if the area positions are the same, they may be displayed at different positions on the screen of the large screen display 25 as shown in FIG. 7.

Also in the present embodiment, as shown in FIG. 7, a frame line 4 indicating the input area corresponding to each drawing input unit 23 of each terminal 100a, 100b, 100c.
1a, 41b, ... Can be displayed differently.
As described above, in the present embodiment, when performing telewriting communication between terminals, the input area for each drawing input unit 23 of each terminal is displayed as a frame line on the screen of the large screen display 25, so that each unit is displayed. Even if the drawing input area is moved to, the positional relationship can be grasped and the joint work of drawing input by a plurality of conference participants can be facilitated.

[0043]

As described above, according to the telewriting communication terminal of the first aspect of the invention, the large screen including the area displayed on the main body display unit is externally connected to the large screen. After displaying on the display device, the external display control unit borders the display area of the display unit on the display screen of the large screen display device to display a frame line, so that the display area of the main unit display unit is enlarged. This can be confirmed on the screen display device, the scroll operation of the main body display unit, etc. can be facilitated, and useless operation can be prevented. Further, since the display area of the partner terminal can be known, the operation of the partner operator can be confirmed.

According to the telewriting communication terminal of the present invention, the handwriting information input from the handwriting information input unit corresponding to the screen size of the main body display unit is externally connected to the large screen display device. Displayed on
Since the external display control unit displays a frame line on the display screen of the large screen display device by framing the display area of the handwriting information, handwriting input can be performed while confirming the handwriting input area on the large screen display device, and the operation can be performed. You can improve the property. Further, since the handwriting input area of the partner terminal can be known, the operation of the partner operator can be confirmed.

According to the telewriting communication terminal of the third aspect of the invention, when a plurality of handwriting information input units are provided, the handwriting information input from each handwriting information input unit is displayed on the large screen display device. In addition to displaying, a frame line is displayed on the display screen of this large-screen display device by framing the display area of each handwritten information, so even if the input area is moved for each handwritten information input unit, the positional relationship between them is maintained. I can grasp
The collaborative work of drawing input by a plurality of conference participants can be facilitated.

Further, according to the telewriting communication terminal of the invention of claim 4, since the frame lines are displayed differently in correspondence with the respective handwriting information input sections, a collaborative work of handwriting input by a plurality of conference participants can be performed. It can be smoothed.
According to the telewriting communication terminal of the fifth aspect of the present invention, when the multipoint connection is made with at least one or more partner terminals, the input is made from the handwriting information input section of each terminal including the own terminal. Since handwriting information is displayed on the large screen display device and a frame line is displayed on the display screen of this large screen display device by framing the display area of each handwriting information, drawing is performed for each handwriting information input section of each terminal. Even if the input area is moved, the positional relationship can be grasped, and the collaborative work of drawing input by a plurality of conference participants can be facilitated.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a telewriting communication terminal according to an embodiment of the invention described in any one of claims 1 to 5.

FIG. 2 is a system configuration diagram of a communication system configured by connecting a plurality of telewriting communication terminals at multiple points.

FIG. 3 is a diagram showing an example of a protocol sequence in Layer 5.

FIG. 4 is a diagram showing a display example of a large screen display and a main body display externally connected to the telewriting communication terminal of FIG.

5 is a diagram showing a display data area in the VRAM of FIG. 1, showing a correlation between the display data areas of the two displays shown in FIG. 4;

FIG. 6 is a configuration diagram showing a telewriting communication terminal according to an embodiment of the present invention.

FIG. 7 is a diagram showing a display example of a large-screen display corresponding to a plurality of drawing input units.

FIG. 8 is a diagram showing a coding example of the DT SPDU shown in FIG.

[Explanation of symbols]

 22 Display Unit (Display Unit) 23 Drawing Input Unit (Handwriting Information Input Unit) 24 VRAM 25 Large Screen Display (Large Screen Display Device) 26 External Display Control Unit (External Display Control Unit) 41 Frame 100 Telewriting Communication Terminal

Claims (5)

[Claims] 1. A display unit for displaying various kinds of multimedia data including handwriting information, and a handwriting information input unit for inputting handwriting information corresponding to a display area of the display unit, wherein a screen size of the display unit is provided. In a telewriting communication terminal externally connected to a large screen display device having a larger screen size, including a region displayed on the display unit, while displaying a wider region on the large screen display device, A telewriting communication terminal, comprising: an external display control unit for displaying a frame line on the display screen of the large screen display device by framing the display area of the display unit. 2. A display unit for displaying various multimedia data including handwritten information, and a handwritten information input unit for inputting handwritten information corresponding to a display area of the display unit, wherein the screen size of the display unit is set. In a telewriting communication terminal having a larger screen size and externally connecting a large screen display device for displaying handwriting information input from the handwriting information input unit, the handwriting information input from the handwriting information input unit is An external display control unit is provided which displays on a large screen display device in correspondence with the screen size of the display unit and displays a frame line on the display screen of the large screen display device by framing the display area of the handwritten information. A telewriting communication terminal characterized in that 3. The telewriting communication terminal according to claim 2, wherein a plurality of handwriting information input units are provided, and handwriting information input from each handwriting information input unit is displayed on a large screen display device and the large screen display is performed. A telewriting communication terminal, characterized in that a display area of each handwritten information is displayed on the display screen of the device to display a frame line. 4. The telewriting communication terminal according to claim 3, wherein a frame line is differentially displayed in correspondence with each handwriting information input unit. 5. The telewriting communication terminal according to claim 2, wherein handwritten information input from a handwritten information input unit included in each terminal including the own terminal when multipoint connection is made with at least one or more partner terminals. A telewriting communication terminal characterized by displaying on a large screen display device and displaying a frame line on the display screen of the large screen display device by edging a display area of each handwritten information.