JPH08179742A - Remote cursor position transmitting device - Google Patents

Abstract

PURPOSE: To provide a remote mouse cursor transmitting device by DTMF in communication field in which mouse cursor information is multiplexed with voice, and transmitted by DTMF signal, and the mouse cursor information and the voice can be simultaneously transmitted with one analog telephone line. CONSTITUTION: This device is formed of a mouse 10; mouse cursor display devices 11, 20 for reading the position signal of the mouse, a DTMF signal converter 14; telephones 15, 17, displays 12, 22 for displaying the cursor; mouse cursor 13, 21; a telephone line 16; a DTMF reader 19 for reading the DTMF signal; and a DTMF cut filter 18 for cutting the DTMF signal. For a picture by static image transmission, the information is exchanged in both directions by pointing it by a pointer with a conversation by voice.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus capable of simultaneously transmitting voice and mouse cursor position information on one line in a video conference system using an analog line.

[0002]

2. Description of the Related Art In recent years, there has been a demand for a system for efficiently transmitting voice, image data, and character data within a limited transmission rate range of a telephone line in a consumer analog video conference system. A conventional remote cursor transmission device will be described below. FIG. 3 shows a conventional remote cursor transmission device, for example, in Japanese Patent Application Laid-Open No. 2-62596. FIG. 3 is a schematic view of this conventional remote cursor detection / synthesis device. In FIG.
A slide projector 1 projects a still image. Two
Is a screen on which the image projected by the slide projector 1 is displayed. 3 is a light beam generator.
4 is a light spot. 5 is a camera. 6 is a transmission line. 7 is a display. Reference numeral 8 is a cursor. Reference numeral 9 denotes a cursor synthesizing unit, which magnifies and projects a kaleidized image on the screen 2 by the slide projector 1.

A light beam generator 3 using a red laser projects a red light spot 4 on a screen 2 as a cursor. After the position of the cursor 4 on the screen 2 is detected by the camera 5, the detected cursor 4 is aligned with the slide image, the cursor combining unit 9 combines them and the result is displayed on the display 7 at another point via the transmission path 6. It

The operation of the conventional remote cursor position detecting / synthesizing apparatus configured as described above will be described below.

First, the electronic slide projector 1 magnifies and projects the slid image on the screen 2. For example, in the light beam generator 3 using a red laser, a red light spot 4 is projected as a cursor on the screen 2 by an instruction operation of a speaker. A student looking at the screen 2 can know the position on the screen 2 designated by the lecturer with this cursor.

Reference numeral 5 denotes a camera for detecting the cursor on the screen 2 and the position on the screen 2. The detected cursor is aligned with the image of the slide and then combined by, for example, the cursor combining unit 9 and displayed on the display 7 at another point via the transmission path 6. Reference numeral 8 is a cursor corresponding to the light spot 4 which is synthesized and displayed. The color and shape of the cursor 8 need not be the same as the light spot 4 as long as the position on the display 7 corresponds to the position of the light spot 4 on the screen 2. The cursor 8 is displayed in a cross shape. This allows you to be at a remote location.
Two mouse cursors pointing to the same point can be displayed on one display.

[0007]

However, in the above configuration, when transmitting voice, the transmission line is
This circuit configuration has a problem in that voice and cursor information cannot be transmitted at the same time because it does not work.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a device capable of simultaneously transmitting voice and mouse cursor information through a single transmission path by adding a simple circuit.

[0009]

In order to achieve this object, a remote cursor position detecting / synthesizing device of the present invention reads a mouse position signal and a mouse for controlling a cursor on the display and displays the position signal on the display. A mouse cursor display device, a cursor position reader for reading the position information of the cursor on the display, a DTMF signal converter for converting the signal read by the cursor position reader into a DTMF signal and transmitting it to the telephone line,
A TMF signal converter and a telephone connected in parallel to a telephone line for transmitting voice, a display for displaying a cursor, a telephone line, a DTMF decoder for decoding a DTMF signal, and a DTMF signal cut D to do
It has a configuration of a TMF signal cut filter.

[0010]

According to the present invention, with the above-described structure, the mouse cursor position signal reflected on the display on the transmitter side is converted into the DTMF signal, superposed on the voice output from the telephone and transmitted by the telephone line, and on the receiver side. , It is possible to separate the voice and the mouse cursor position information, display the mouse cursor on the display on the receiver side according to the cursor position information, and transmit the voice and the mouse cursor position information at the same time.

[0011]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 10 is a mouse, and 11
Is a mouse cursor display device, 12 is a display, 13 is a mouse cursor, 14 is a DTMF signal converter, 15 is a telephone, 16 is a telephone line, 17 is a telephone, and 18 is DTMF.
Cut-to-filter, 19 is a DTMF signal decoder, 20 mouse cursor display device, 21 mouse cursor, 22 display.

The operation of the remote cursor transmission device of this embodiment constructed as described above will be described with reference to FIG. First, the position information of the mouse cursor 13 on the display 12 controlled by the mouse 10 on the transmitter side is sent to the DTMF signal converter 14 by the mouse cursor display device 11 and converted into a DTMF signal, and the telephone line 1
Sent to 6. On the other hand, the voice is sent to the telephone line 16 by the telephone 15 and is superimposed on the information coming from the DTMF signal converter 14.

The voice signal transmitted from the transmitter side through the telephone line 16 and the superimposed signal of the mouse cursor information are
It is converted into mouse cursor position information by the DTMF signal decoder 19 on the receiver side, and the mouse cursor display device 20 is displayed.
The mouse cursor 21 is displayed on the display 22 on the receiver side at the same position as the mouse cursor 13 on the transmitter side. On the other hand, the voice information transmitted by the telephone line 16 is D-filtered by the DTMF cut filter 18.
After the TMF signal is removed, the telephone 17 is entered and only the voice signal is received.

As described above, according to this embodiment, by transmitting and receiving the mouse cursor information by the DTMF signal, the voice and the cursor information 2 can be used by using the analog 1 line.
It is possible to send one piece of information at a time. Although the mouse cursors 13 and 21 are cross-shaped in the first embodiment, it goes without saying that figures such as squares and circles may be used.

(Embodiment 2) In FIG. 2, 23 is a mouse, 24 is a mouse cursor display device, 25 is a display, 26 is a mouse cursor, 27 is a DTMF signal converter, 28 is a telephone, 29 is a telephone line, 30 is a telephone, 3
1 is a DTMF cut-off filter, 32 is a DTMF signal decoder, 33 mouse cursor display device, 34 mouse cursor, 35, display, 36 and 37 are still image transmission devices,
38 is a keyboard, 39 is a key input decoder, and 40 is a character display device. The operation of the remote cursor transmission device of this embodiment configured as described above will be described with reference to FIG.

First, the screen displayed on the display 25 on the transmitter side is displayed on the telephone line 2 by the still image transmission device 36.
The still image is transmitted to the still image transmitting device 37 on the receiver side via the line 9. The transmitted image is displayed by the display 35. After transmission, a common still image is displayed on the display on the transmitter side and the receiver side. A mouse cursor 26 controlled by the mouse 23 is superimposed and synthesized on the still image of the sender, and its position information is
The DTMF signal converter 27 converts the DTMF signal. This information is synthesized with the voice output by the telephone 28 and sent to the telephone line 29.

On the other hand, on the receiver side, the voice signal and the DTMF are
A signal that is a multiplexed signal is input, but this signal is
First, it is divided into two signal paths, one of which is DT
After the DTMF signal is removed by the MF bracket and the filter 31, the telephone 30 enters and only the voice signal is extracted.

The other signal is decoded by the DTMF signal decoder 32, converted into a position on the display by the mouse cursor display 33, and expressed as the position of the mouse cursor 33 on the display 32 on the receiver side. . When sending a character, the character information input from the keyboard 38 is decoded by the key input decoder 39, converted into a DTMF signal by the DTMF signal converter 27, and sent to the receiver side by the telephone line.
It is converted into a character code by the signal decoder 32 and displayed on the receiver side display 35 by the character display device 40.

As described above, according to this embodiment, by transmitting and receiving mouse cursor information as a DTMF signal, it is possible to send voice and cursor information or character information at the same time by using one analog line. Becomes

Further, by transmitting a still image from the transmitter side to the receiver side in advance and synthesizing it with the mouse cursor, the portion desired to be pointed on the still image can be transmitted on the receiver side.

[0022]

As described above, according to the present invention,
Since one line of the analog telephone line can carry voice information and two pieces of cursor information, and can be realized by a very simple circuit, its practical effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an operation in a first embodiment of the present invention.

FIG. 2 is a block diagram for explaining the operation in the second embodiment of the present invention.

FIG. 3 is a block diagram of a conventional remote cursor synthesis device.

[Explanation of symbols]

 1 Slide Projector 2 Screen 3 Light Beam Generator 4 Light Spot 5 Camera 6 Transmission Line 7 Display 8 Cursor 9 Cursor Synthesizer 10, 23 Mouse 11, 24 Mouse Cursor Display Device 12, 22 25, 35 Display 13, 2126, 34 mouse cursor 14, 27 DTMF signal converter 15, 17 28, 30, telephone 16, 29 telephone line 36, 37 still image transmission device 18, 31 DTMF cut filter 19, 32 DTMF signal decoder 20, 33 mouse cursor display device 36, 37 Still image transmission device 38 Keyboard 39 Key input decoding device 40 Character display device

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04N 7/15

Claims (3)

[Claims] 1. A mouse for controlling a mouse cursor pointing to an arbitrary position on a display, a mouse cursor display device for reading the position of the mouse cursor, and a signal from the mouse cursor display device for DT.
A DTMF signal converter for converting into an MF signal and transmitting it to a telephone line, a transmitter equipped with a telephone for transmitting voice through the telephone line, and a DTMF signal transmitted through the telephone line of the transmitter And a DTMF cut filter for
Telephone for inputting voice signal output from F cut filter, DTMF decoder for decoding DTMF signal, and mouse cursor for reading position signal output from the DTMF signal decoder and displaying at predetermined position on display A remote cursor position transmission device comprising a receiver having a display device. 2. The remote cursor position transmission device according to claim 1, wherein the still image transmission device and the mouse cursor superimposing device can indicate a still image transmitted in advance by a mouse cursor. 3. The remote cursor position transmission device according to claim 1, wherein the character information can be transmitted by a character DTMF signal conversion device which converts the character information into a DTMF signal.