JPH0591229A - Handwriting communication terminal - Google Patents

Abstract

PURPOSE:To transit the mode to the picture drawn communication mode with one operation only by sending a picture to other terminal equipment in the picture drawn communication start mode when a terminal equipment designates the picture drawn communication mode in order to transit the voice mode into the picture drawn communication mode. CONSTITUTION:When a telephone set 8 of a hand-writing communication terminal equipment calls an opposite party and is connected to a public line 7, relay contacts 11, 12 are closed to set the voice mode and to attain the voice talking. A voice signal from the telephone set 8 is sent to the opposite party via the contact 12 and the line 7 and sent to the telephone set 8 via the contact 11, a coupling transformer 13, an amplifier 14, a BEF 18 and a coupling transformer 16 to establish talking. On the other hand, when the picture drawn communication mode is designated, a picture drawn communication start command 1F is sent in the following order: arithmetic operation control section 6 MODEM 4 BPF 20 amplifier 19 coupling transformer 20 contact 11 line 7. The receiver side receives the command F1 in the following order: line 7 contact 11 transformer 13 amplifier 14 BPF 15 MODEM 4 control section 6. When the command 1F is received, the terminal equipment starts the picture drawn communication mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handwriting communication terminal connected to an analog public line or a dedicated line.

[0002]

2. Description of the Related Art A conventional handwritten communication terminal has a voice mode which is exactly the same as a normal telephone call and a drawing communication mode in which handwritten data is input and a call is made while watching the display. When performing drawing communication between people, first call the other party by telephone, that is, set to voice mode, confirm that they switch to drawing communication by mutual call, and operate the key switch or icon etc. to select the drawing communication mode respectively. ing. This procedure is CCITT Recommendation T1
It is also the content of 50.

[0003]

As described above, in the conventional handwritten communication terminal, when performing drawing communication, both parties transit (switch) from the voice mode to the drawing communication mode.
Must. Therefore, the operation of the system as a whole is troublesome, and if one of the two communicating parties forgets to press a switch etc. and remains in voice mode, handwriting data cannot be sent or received. There was a problem that it was not done in.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a handwriting communication terminal capable of switching to a drawing communication mode by operating one terminal for communication. I am trying.

[0005]

A handwriting communication terminal of the present invention comprises a handwriting input section for inputting handwritten data with an input pen, a display section for displaying a handwritten image,
A modem unit for transmitting or receiving the handwritten data,
A network control unit for connecting / disconnecting a line and an arithmetic control unit for performing data processing. In the voice mode, a unit for receiving the transmitted drawing communication start command and the received drawing communication. Means for transitioning from the voice mode to the drawing communication mode in response to the start command.

In this handwriting communication terminal, when performing drawing communication with the other party, when one of the handset commands the drawing communication mode, the own machine enters the drawing communication mode and a drawing communication start command is transmitted to the other party, and the other party The drawing communication command is received, and in response to this, the own device transits from the voice mode to the drawing communication mode. This enables drawing communication between the two.

[0007]

The present invention will be described in more detail with reference to the following examples. FIG. 1 is a block diagram of a handwriting communication terminal showing an embodiment of the present invention. This handwriting communication terminal includes a handwriting input unit 1 for inputting handwritten data with an input pen 2, a display unit 3 for displaying an input handwritten image, and a modem 4 for transmitting or receiving handwritten data.
And a network control unit (NCU) for connecting and disconnecting with the line 7.
(Circuit) 5 and a calculation control unit 6 that performs data processing. The network control unit 5 also includes a relay contact 11 for connecting / disconnecting the line 7 and the modem 4, a relay contact 12 for connecting / disconnecting the line 7 and the telephone set 8, coupling transformers 13 and 16, amplifiers 14 and 19, and BPF 15. , 20 and BEF17, 1,
It has 8 etc. In the conventional handwriting communication terminal, the relay contact 11 is opened and the relay contact 12 is opened in the voice mode.
However, in this embodiment, the relay contacts 11 and 12 are also closed in the voice mode.
That is, the data can be received even in the voice mode. In this embodiment, the modem 4 has a relay contact 11,
The connection of 12 receives the audio signal of a certain frequency band transmitted from the other party via the line 7 and the data such as the "drawing communication start command". Then, the "drawing communication start command" is detected from the received signal. This detection is relatively easy. For example, the "drawing communication start command" is a 1-byte data (00h to FFh excluding 1Fh
1Fh, a command, and 1Fh (however, 1Fh is an information separation code used in the drawing communication recommendation T150) are three data sets. The receiving side receives the "drawing communication start command" only after receiving the continuous 3-byte data set. In the drawing communication recommendation T150, the frequency band of 1650 Hz to 1850 Hz is used for drawing data communication. Therefore, this frequency signal in the voice signal is also converted into data by the modem 4. It is possible that the audio signal may accidentally become the "drawing communication start command", but this is an extremely low probability and can be ignored.

In the handwritten communication terminal of this embodiment, when drawing is communicated, first, the other party is called by the telephone 8 of one of the handwritten communication terminals and connected to the other party through the public line 7, The relay contacts 11 and 12 of both units are turned on to start the voice mode (step ST in FIG. 2).
1). In this mode, you can talk to each other by voice. The voice signal from the telephone 8 is sent to the other party through the relay contact 12 and the line 7, and is transmitted to the telephone 8 through the relay contact 11, the coupling transformer 13, the amplifier 14, the BEF 18, and the coupling transformer 16 in the other party, and the telephone call is made. Is established. In the BEF 18, only the data signal component is attenuated.
Here, when one of the terminals designates the drawing communication mode, the drawing communication start command, that is, 1F, the command, 1F is transmitted from the designated terminal. This is performed in the order of arithmetic control unit 6 → modem 4 → BPF 20 → amplifier 19 → coupling transformer 20 → relay contact 11 → line 7.

On the other hand, in the terminal device on the receiving side, the transmitted drawing communication start command is sent to the line 7 → relay contact 11 → coupling transformer 13 → amplifier 14 → BPF 15 → modem 11 →
When the arithmetic control unit 6 receives the signals in order, as shown in FIG. 2, 1F is received (step ST2), a command is received (step ST3), and further 1F is received (step ST).
4) Then, this terminal also starts the drawing communication mode (step ST5).

[0010]

According to the present invention, when one of the terminals designates the drawing communication mode for the transition from the voice mode to the drawing communication mode, the drawing communication start command is transmitted to the other terminal. As a result, the drawing communication mode is automatically switched, and the problem that normal communication cannot be performed due to forgetting the operation is solved. Also, in terms of operability, it is better to change to the drawing communication mode with only one operation than to specify the mode with both terminals as in the conventional case.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a handwriting communication terminal according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the receiving-side terminal of the embodiment.

[Explanation of symbols]

 1 Handwriting input unit 2 Input pen 3 Display unit 4 Modem 5 Network control unit 6 Arithmetic control unit 7 Line 8 Telephone

Claims (1)

[Claims] 1. A handwriting input unit for inputting handwritten data with an input pen, a display unit for displaying a handwritten image, a modem unit for transmitting or receiving the handwritten data, and a network control unit for connecting / disconnecting a line. And a handwriting communication terminal comprising an arithmetic control unit for performing data processing, in the voice mode, a means for receiving the transmitted drawing communication start command, and a voice mode in response to the received drawing communication start command. From the drawing communication mode to a handwriting communication terminal.