JP3281055B2 - Telewriting communication terminal - Google Patents

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 device capable of transmitting and receiving handwritten input data and the like together with voice information, and further relates to a video conference for handling voice, handwritten input data, still images or moving images. The present invention relates to a telewriting communication terminal device applicable to a system and a multimedia communication terminal device.

[0002]

2. Description of the Related Art Conventionally, in telewriting communication, only a terminal which has a token among terminals performing communication can transmit data to another terminal and depends on the possession of the token. There are two communication modes in which data can be transmitted without being transmitted.

[0003] In a system in which only a terminal that has a token can transmit, when writing from a terminal that does not own the token to the common display screen, it is difficult to write until the token is acquired. there were. On the other hand, those which can transmit data without depending on the token can freely write on the common screen. As such a telewriting communication terminal device that does not depend on a token, for example, the one described in Japanese Patent Application Laid-Open No. 3-150899 is known. In this method, the validity of transmission data is determined based on an agreement between operators who are communicating after data transmission.

[0004]

However, in such a conventional telewriting communication terminal device that does not depend on a token, the problem of waiting for the acquisition of a token can be solved, but a terminal that does not own the token can use a common screen. If additions and corrections are made out of order, the display screen is likely to be confused. Also, the above-mentioned Japanese Patent Application Laid-Open No. 3-15098
As disclosed in Japanese Patent Application Publication No. 9-29, the one in which the validity of transmission data is determined based on an agreement between terminals can prevent the confusion as described above, There is a problem that it takes time to confirm the agreement and the like, and it is not efficient anyway, and it is difficult to improve the operability of the operator.

[0005] Therefore, the invention according to claims 1 and 2 is
By setting a write permission token for each of a plurality of pages displayed on the display means, it is possible to simultaneously perform retouching and correction work on each of the displayed pages on a plurality of terminals, thereby improving operability of an operator. Is an issue. A third object of the present invention is to improve the operability of the operator by eliminating token control for writing of a display area other than a page that is not stored, that is, a page that is not written to a storage device.

[0006]

According to the first aspect of the present invention,
In order to solve the above problem, in a telewriting communication terminal device comprising: a display unit capable of displaying a plurality of pages, and a writing unit capable of writing to a page displayed on the display unit, A write permission token is set for each displayed page, and control means is provided for permitting only the own device or the partner device having the write permission token to write to the page corresponding to the write permission token. And

According to a second aspect of the present invention, in order to solve the above problem, in addition to the configuration of the first aspect, when the own apparatus has the write permission token, a page corresponding to the write permission token is stored in the own apparatus. It is characterized by being highlighted on the display means of the machine. According to a third aspect of the present invention, in order to solve the above-mentioned problem, a display means for displaying a page and having a display area also around the page, a page displayed on the display means and a display area outside the page are provided. Writing means capable of writing, a writing permission token is set only for writing to a page, and only the own apparatus or the other apparatus having the writing permission token is displayed on the display means. Allow writing to the displayed page,
Both the own terminal and the other terminal are provided with control means for permitting writing to a display area outside the page of the display means.

[0008]

According to the first aspect of the present invention, a write permission token is set for each page displayed on the display means, and only the own device or the partner device having the write permission token can set the page corresponding to the write permission token. Writing is allowed. Therefore, writing can be simultaneously performed from each terminal for each page, and the operability of the operator is improved.

According to the second aspect of the invention, in addition to the function of the first aspect, when the own device has the write permission token, the page corresponding to the write permission token is highlighted on the display means of the own device. You. Therefore, an erroneous operation of the operator such as writing on a page having no token is prevented. According to the third aspect of the invention, the write permission token is set only for writing to the page, and writing to the display area outside the page of the display means is permitted to both the terminal of the own apparatus and the terminal of the other apparatus. .
Therefore, the writing of the non-page area that does not remain in the memory can be freely performed from each terminal, and the operability of the operator is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a telewriting communication terminal device according to the first to third aspects of the present invention. The telewriting communication terminal device of the present embodiment includes a teleconference system having a telewriting communication function, a multimedia communication terminal device, and the like. Here, a facsimile that performs voice communication, telewriting communication, and transmission and reception of a document image is used. A description will be given using a device capable of communication as an example.

First, the configuration will be described. In FIG. 1, a telewriting communication terminal device 1 according to the present embodiment includes a system control unit 2 and a ROM (Read Only Memory).
y) 3, RAM (Random Access Memo)
ry) 4, image memory 5, communication control unit 6, encoding / decoding unit 7, operation unit 8, drawing input unit 9, scanner 1
0, a display unit 11, a system bus 12, a handset 13, a microphone 14, a speaker 15, and the like.

The system control section 2 controls each section of the apparatus according to a program stored in the ROM 3. The ROM 3 stores a control program of the apparatus and the like, and the RAM 4 stores
Various data necessary for controlling the apparatus are stored. The image memory 5 temporarily stores image data read by the scanner 10 or stores received image data. The communication control unit 6 is connected to the handset 13, the microphone 14, the speaker 15, and the like, and includes an audio codec for performing A / D conversion of an audio signal. The communication control unit 6 controls audio communication, and performs facsimile communication and the present invention. Control and execute telewriting communication. The encoding / decoding unit 7 encodes / decodes the handwritten input data and converts the image data input from the scanner into MH (Modified Huffman), MR used in facsimile communication.
(Modified READ), MMR (Modified
encoding (i.e., Modified READ) or decoding received image data. Operation unit 8
Has a numeric keypad and the like, and allows the operator to input a destination telephone number, perform enlargement / reduction of the display content of the display unit 11, an editing instruction, and the like, and perform a token ownership switching operation. The drawing input unit 9 is composed of a tablet and its control unit, detects a portion touched by a dedicated pen tip, and takes in the position information.

The scanner 10 is a CCD (Charge).
Using a coupled device, an original is read line by line and output as image data. The display unit 11 is a CRT (Cathod Ray T).
ube) or LCD (Liquid Crystal)
Display) and a display control unit that controls them, and the display control unit performs screen control such as enlargement / reduction of display contents and multi-window. The telewriting communication terminal device 1 according to the present embodiment has an ISDN (Integrated Ser
devices, a digital network (Digital Network) or a dedicated line.

Here, a case where the above-described telewriting communication terminal device 1 is an embodiment of the telewriting communication terminal device according to the first and second aspects of the present invention will be described below. In this embodiment, the display unit 11 constitutes display means capable of displaying a plurality of pages, and the drawing input unit 9 constitutes writing means capable of writing on the page displayed on the display unit 11. Then, the system control unit 2 and the communication control unit 6 configure the control unit of the present application, set a write permission token for each page displayed on the display unit 11, and set only the own device or the partner device having the write permission token. , Writing to the page corresponding to the writing permission token is permitted. When the own device has the write permission token, the page corresponding to the write permission token is highlighted on the display unit 11 of the own device. Specifically, FIG. 2 shows a display example of the display unit 11, in which the frame line of the page 2 having the token is highlighted with a thick line. The hatched portion in FIG. 2 is a menu display area.

Next, a telewriting communication system executed between the devices of the present embodiment will be described. Note that telewriting communication uses OSI for layers 1 to 5.
(Open Systems Interconnection
), and there is a telewriting application above layer 5. Where
Ear 5 is basically a CCITT Recommendation X.5. 225 compliant
However, Recommendation X. 225 uses tokens for full-duplex communication
Is not possible, so talk for each page in this embodiment.
The control protocol is unique and not recommended. What
Contact Recommendation X. As a way to make it fully compliant with
Establish a session connection for each page
There is a method of half-duplex communication by connection, but here
The description is omitted. FIG. 3 shows an example of the protocol sequence in the layer 5. FIG. 3 shows the connection from the layer 5 connection to the data transfer phase, and omits the procedure after the communication termination procedure. Hereinafter, description will be given based on the protocol sequence of FIG.

First, when an operator performs a calling operation to perform telewriting communication and a line connection is made with a partner terminal, the layer 5 performs a CN (Connect) SPDU ( Sessio
n Protocol Data Unit) to the partner terminal. The CN SPDU contains information for performing full-duplex communication and information for performing communication according to the present invention. FIG. 4 shows a part of a coding example of the CN SPDU. On the other hand, AC (Accept
t) When the SPDU is returned, telewriting communication is enabled, and the operator performs a telewriting communication start operation. As a result, AS (Activit
y Start) The SPDU is delivered to the partner terminal, and the handwritten input data (drawing data) can be transmitted and received.

In the communication according to the present embodiment, all write permission tokens for the page displayed on the display unit 11 are initially given to the calling terminal. Only the terminal that has the token for the page can send the handwritten input information in the page to the partner terminal. When the calling side performs handwriting input on page 1 using drawing input unit 9, this input data is DT (Da).
ta) Delivered to the partner terminal by SPDU.

Since the tokens are all initially given to the calling terminal, if the called terminal wants to send drawing data to page 2, the called terminal sends the page 2 to the calling terminal.
PT (Pleasure T)
okens) Pass the SPDU. The fact that the token acquisition request is for page 2 is set in the user data in the PT SPDU. FIG. 5 shows a coding example of this PT SPDU. When the calling terminal receives the PT SPDU, the GT (Giv
e Tokens) Pass SPDU. The called terminal is G
When the T SPDU is received, the drawing data can be transmitted to page 2, and the input data is passed to the calling side by the DT SPDU. In this manner, transmission of the drawing data for page 1 from the calling terminal and transmission of the drawing data for page 2 from the called terminal can be executed simultaneously.

Next, a description will be given of a display position of handwritten input data when adding or correcting by handwriting input, and a method of identifying which page area it is in. The display position of the page displayed on the display by the operation of the operator and information on which page is stored in the RAM 4. Some pages are newly generated by the operator or some pages are read from an image memory such as a hard disk. A display example of a page on the display unit 11 is shown in FIG. 2 as described above. It should be noted that page 1 and page 2 merely mean that they are separate pages, and need not be pages in the same file. Further, page 1 and page 2 may be displayed in one window, or separate windows may be generated and displayed for each page. Further, the display contents of the display are controlled to be the same at the calling terminal and the called terminal. This is realized by exchanging operation contents with each other. This operation information is based on the DT
It is handed over to the partner terminal in SPDU. Since the display control technique between the terminals is already known, a detailed description thereof will be omitted here.

When the position information of the handwritten input portion is input from the drawing input unit 9, it is compared with the position information of the page stored in the RAM 4, and if the position information is within the page area, the handwritten input information is transmitted by the above communication method. Send to terminal. At this time, even in the page area, if there is no write permission token for the page, the content handwritten by the terminal itself is not displayed and the handwritten input information is not transmitted.

As described above, in the present embodiment, when a plurality of pages are displayed on the display unit 11, while the page is being edited or modified by one's own terminal, that page is displayed from another terminal. Is not modified or modified, so there is no hindrance to the modification and modification work. At this time,
In the partner terminal, since it is possible to add or modify another page having the token, it is possible to simultaneously work on a plurality of pages and improve the operability of the operator between the communication terminals.

Further, since the page in which the terminal has the write permission token is highlighted on the display unit 9, erroneous operations by the operator can be prevented, and the retouched and modified contents in the area can be saved. The target can be recognized by the operator, and the operability of the operator can be further improved. Here, the telewriting communication terminal device 1 of FIG.
A case of an embodiment of the telewriting communication terminal device according to the described invention will be described below.

In this embodiment, the display unit 11
Constitutes display means for displaying a page and also having a display area around the page, and the drawing input unit 9
Constitute writing means capable of writing in a page displayed on the display unit 11 and a display area outside the page. Then, the system control unit 2 and the communication control unit 6 constitute a control unit of the present application, and set a write permission token only for writing to a page,
In addition, only the own device or the other device having the write permission token is allowed to write the page displayed on the display unit 11, and the display unit 11 Write to the display area outside the page. This embodiment is an example in which the out-of-page area in the embodiment of the first and second aspects of the present invention is set as an area which can be added and modified without depending on a token.
The protocol sequence in this case is shown, for example, as shown in FIG. 6, and FIG. 6 shows only a layer 5 data transfer portion. Note that this embodiment is an independent
Although the protocol X. 225 completely compatible
Half duplex mode for each page
Establish a connection and use all
There is a way to establish a double session connection,
Here, the description is omitted.

As described above, in the present embodiment, rewriting and correction outside the page area displayed on the display can be performed from any terminal without a write permission token, so that there is no need to save the drawing. (Handwriting input) can be performed without a token acquisition operation, and the operability of the operator can be improved.

[0025]

According to the first and second aspects of the present invention,
Since the write permission token is set for each page of the plurality of pages displayed on the display means, it is possible to simultaneously edit and correct each displayed page on a plurality of terminals, thereby improving the operability of the operator. Can be improved.

According to the third aspect of the present invention, since token control for writing of a non-stored portion, that is, a display area other than a page which is not written to the storage device is eliminated, a display area other than a page can be freely provided from each terminal. Can be written, and the operability of the operator can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a telewriting communication terminal device according to the present invention.

FIG. 2 is a view showing a display example of the display.

FIG. 3 is a view showing a protocol sequence from the connection of the layer 5 to the data transfer phase.

FIG. 4 is a diagram showing a coding example of the CN SPDU.

FIG. 5 is a diagram showing a coding example of the PT SPDU.

FIG. 6 is a view showing a protocol sequence of a data transfer portion of the layer 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telewriting communication terminal device 2 System control part (control means) 6 Communication control part (control means) 9 Drawing input unit (writing means) 11 Display unit (display means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 1/00-1/00 108

Claims (3)

(57) [Claims] 1. A telewriting communication terminal device comprising: display means capable of displaying a plurality of pages; and writing means capable of writing to a page displayed on the display means. A write permission token is set for each page, and control means is provided for permitting only the own device or the partner device having the write permission token to write to the page corresponding to the write permission token. Telewriting communication terminal device. 2. The telewriting according to claim 1, wherein when the own device has the write permission token, a page corresponding to the write permission token is highlighted on a display unit of the own device. Communication terminal device. 3. Display means for displaying a page and also having a display area around the page, and writing means for writing the page displayed on the display means and a display area outside the page. In the telewriting communication terminal device, a write permission token is set only for writing to the page, and writing to the page displayed on the display means is performed only for the own device or the other device having the write permission token. A telewriting communication terminal device comprising a control means for permitting and writing to a display area outside a page of a display means in both the own apparatus and the other apparatus.