JPH02186782A - Picture drawing ordering device - Google Patents

Abstract

PURPOSE:To realize smooth order between a transmitting side and a receiving side by not transmitting coordinates data or transmitting it after reducing the number of bits of the coordinates data when the changing speed of input coordinates is large, or does not move out of a prescribed range prescribed number of times. CONSTITUTION:When the coordinates data a mouse input interface 2 reads in conformity with a sampling clock 11 shifts from a point (a) to the point (b), distance ab is longer than (r), and anything is not outputted to a transmission data converting part 4. Next, when it shifts from the point (b) to the point (c), since the distance bc is shorter than (r), the coordinates (x', y') of the point (c) is outputted to the transmission data converting part 4. This coordinates data is converted into transmission data by the transmission data converting part 4, and further, is modulated by a MODEM 5, and is multiplexed together with the voice of a telephone set by a frequency multiplexing part 7, and is outputted to a telephone line. Besides, a signal from a remote party side is separated into a sound signal and modulation data by the frequency multiplexing part 7, and the sound signal is outputted to the telephone set 6, and the modulation data is outputted to a received data converting part 8 so as to be converted into the coordinates data, and is displayed 10 by a display control part 9.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention has a drawing input device and a display device, and uses drawings while communicating on both the sending side and the receiving side using a telephone line or the like. The present invention relates to a drawing meeting device for holding meetings.

[Conventional technology]

Conventionally, as a remote conference system using general telephone lines,
As described in Japanese Unexamined Patent Application Publication No. 62-53084, a system is known in which a cursor or figure is displayed on a two-way display in real time using a mouse or doublet while talking.

[Problem to be solved by the invention]

However, in the conventional method described above, coordinate data such as markers is transmitted as input coordinate data, so for example, the communication capacity is 300 baud and the amount of information of the input device is 12
In the case of 00 baud, if the data is input continuously, the transmission data will be accumulated in the transmission buffer, resulting in a time difference between the display on the other party's side and the display on the own side. As described above, there is a problem in that it is inconvenient as a remote conference system for holding meetings in real time.

An object of the present invention is to provide a drawing meeting device that solves the problems of the prior art and allows smooth meetings.

[Means to solve the problem]

The above object is a coordinate input means for inputting coordinate data from the drawing input device in a drawing meeting device that has a drawing input device and a display device and conducts meetings by transmitting and receiving drawing data bidirectionally using a telephone line etc. a display means for displaying an index at the position of the display device indicated by the coordinate data; a communication means for transmitting and receiving the coordinate data with the other party; and a coordinate change rate detection means for detecting the change rate of the coordinate data input from the coordinate input means. This is achieved by comprising a data amount control means for controlling the amount of coordinate data to be transmitted according to the change speed detected by the coordinate change speed detection means.

The coordinate change rate detection means is a means for detecting the change rate of the coordinate data input from the coordinate input means, and includes a storage means for storing previous coordinate data, and a storage means for storing the previous coordinate data stored in this storage means. Calculating means for calculating the distance to the current coordinate data.

and a determining means for determining whether the distance calculated by the calculating means is within a predetermined range.

The data amount control means is means for controlling the amount of coordinate data to be transmitted according to the change speed detected by the coordinate change speed detection means, and may be a transmission control means or a coordinate bit number switching means. There may be.

The transmission control means transmits the coordinate data using the communication means when the change rate detected by the coordinate change rate detection means is within a predetermined change rate detection range, and transmits the coordinate data when the change rate is outside the range. Do not send data. The coordinate bit number switching means, when the change rate detected by the coordinate change rate detection means is within a predetermined change rate detection range,
The coordinate data is transmitted with a large number of bits using the communication means, and when the coordinate data is outside the range, the coordinate data is transmitted with a small number of bits using the communication means.

Further, when two change rate detection ranges are provided, a first range and a smaller second range, the transmission control means may detect whether the change rate detected by the coordinate change rate detection means is the same as the first range or a second range smaller than the first range. or when the coordinate data is outside the first range and the second range, the coordinate data is not transmitted. The coordinate bit number switching means transmits the coordinate data when the rate of change detected by the coordinate change rate detection means is outside the first range, or within the first range and within the second range. If the coordinate data is within the range, the coordinate data is transmitted with a small number of bits, and if the coordinate data is within the first range and the second
If the coordinate data is outside the range, the coordinate data is sent with a large number of bits.

[Effect]

The drawing meeting device of the present invention displays a figure or a cursor by the display means at the position on the display device indicated by the coordinate data input by the coordinate input means, and at the same time transmits the coordinate data by the communication means to the other party's display device. This is a system configured to output the same thing to both. The rate of change of coordinate data input from the coordinate input means is detected by the coordinate change rate detection means, and the amount of data to be transmitted is varied by the data amount control means in accordance with the rate of change.

Further, the calculation means calculates the distance between the coordinate data input from the coordinate input means and the previous coordinate data stored in the storage means, and the determination means determines whether the distance is within a predetermined range. Depending on the determination result, the amount of data to be transmitted is varied by the data amount control means.

Further, when the data amount control means is used as the transmission control means, the coordinate data is transmitted when the rate of change is large or not within a predetermined range.

In addition, when the data amount control means is a means for switching the number of coordinate bits, when the rate of change is large or not within a predetermined range, the coordinate data is transmitted with a smaller number of bits, and when the rate of change is small, the coordinate data is transmitted with a smaller number of bits. Alternatively, when the coordinate data is within a predetermined range, the coordinate data is transmitted using a large number of bits.

In this way, it is possible to switch whether or not to transmit according to changes in the coordinate data input by the coordinate input means, or
By transmitting with a reduced number of bits, the amount of information to be transmitted can be reduced, so the simultaneity between the transmitting side and the receiving side becomes more reliable, and it becomes possible to carry out smooth discussions.

〔Example〕

1 and 2 regarding the first embodiment of the present invention.
This will be explained with reference to the figures.

FIG. 1 is a block diagram showing the configuration of a drawing meeting device that can transmit drawing data while talking over a single telephone line.

In FIG. 1, 1 is a mouse, 2 is a mouse input interface, 3 is a coordinate information control unit, 4 is a transmission data conversion unit, 5 is a modem, 6 is a telephone, 7 is a frequency multiplexing unit, 8 is a reception data conversion unit, 9 is a display control unit, 10 is a display, and 11 is a sampling clock.

FIG. 2 is a flowchart and an auxiliary diagram showing the operation of the coordinate information control section 3 shown in FIG. 1.

The operation of the drawing meeting apparatus of this embodiment will be described below.

First 1. When you move the mouse 1, the mouse input interface 2 converts the mouse data into coordinate data,
It is output to the coordinate information control section 3 and display control section 9. The display control unit 9 displays a cursor at a position on the display 10 indicated by the coordinate data obtained from the mouse input interface 2. As shown in FIG. 2(,), the coordinate information control unit 3 calculates the difference between the coordinate data ()C, y) obtained from the mouse input interface 2 and the previous coordinate data (x*y'). If the difference is larger than the set value r, nothing is output to the transmission data converter 4. Further, if the difference is smaller than the set value r, the coordinate data (x
ty) is output. When the coordinate data read by the mouse input interface 2 according to the sampling clock 11 moves from point a to point b as shown in FIG. 2(b), the distance between point a and point b is greater than r, so Nothing is output to the transmission data converter 4. Next, from point b to 0
When moving to the point, the distance between point b and point 0 is smaller than r, so the coordinate data (x' + y') of point C is output to the transmission data converter 4. The coordinate data is converted into transmission data by the transmission data converter 4, further modulated by the modem 5, frequency multiplexed with the voice of the telephone by the frequency multiplexer 7, and output to the telephone line. Further, the signal from the other party is divided into an audio signal and modulated data by the frequency multiplexing unit 7, the audio signal is output to the telephone 6, and the modulated data is output to the received data converting unit 8 and converted into coordinate data. The converted image is displayed on the display 10 by the 1 display control section 9.

In this way, when there is a large change in the input coordinates, that is, when the cursor is moved to another point, the coordinate data during the movement is not transmitted, so the amount of data to be transmitted can be reduced.

Next, a second embodiment of the present invention will be described using FIG. 3. However, the block section of the drawing meeting device of this embodiment is the same as that of the drawing meeting device shown in FIG.
The processing of the coordinate information control section 3 is as shown in FIG.

The operation of the drawing meeting apparatus of this embodiment will be described below.

First, when the mouse 1 is moved, the mouse data is converted into coordinate data by the mouse input interface 2, and the 0 display control part 9 outputted to the coordinate information control part 3 and the display control part 9 is obtained from the mouse input interface 2. A cursor is displayed at the position on the display lo indicated by the coordinate data. As shown in FIG. 3(a), the coordinate information control unit 3 uses the coordinate data (x, y) obtained from the mouse input interface 2 and the previous coordinate data (x' + y').
If the difference is larger than the set value r1, the counter C is set to "0" and the transmission data converter 4
does not output anything. Also, if the difference is smaller than rl,
It is checked whether it is within the second range r2. Now, the coordinate data read by the mouse input interface 2 according to the sampling clock 11 is shown in FIG. 3(b).
As shown in the figure, when moving from point a to point b, the distance between point a and point b is greater than rl, so nothing is output to the transmission data converter 4. Next, when moving from point B to point C,
Since the distance between point b and cA is smaller than rl, this time r2
Check whether it is within the range.

If the distance between point b and point C is within the range of r2, counter C is incremented by one, and counter C becomes "3".
In other words, it is checked whether the range of r2 has been reached three times consecutively. When the counter C is not "3", the coordinate data of point C (x'+y') is output to the transmission data converter 4. The distance between point d and point C is r2
If it is not within the range, the counter C is set to [0] and the coordinate data (x' + y') of point C is output to the transmission data converter 4. Furthermore, if the counter C is "3", nothing is output to the transmission data converter 4.

In the case of FIG. 3 (''), point d is within point C, and point e is within the range of radius r2 centered on point d, so the counter C is incremented and transmitted. At this time,
Counter C is "2". However, the next point f is within the range of radius r2 centered on point e, but when counter C is incremented, counter C
is "3", so transmission is stopped as shown in FIG. 3(a). Therefore, the subsequent points g, h, and i are also not transmitted.

In this way, when there is a large change in the input coordinates, such as when moving the cursor to another point, the coordinate data is not sent during the movement, and when the cursor is moved to another point, the coordinate data is not sent, and even when the cursor is moved to a different point, the coordinate data is not sent. Since the data is not transmitted, the amount of data to be transmitted can be reduced.

Next, regarding the third embodiment of the present invention, FIGS.
This will be explained using figures.

FIG. 4 is a block diagram showing the configuration of a drawing meeting device capable of transmitting drawing data while talking over a single telephone line.

In Figure 4, the same reference numerals as in Figure 1 indicate one name, and 3
3 is a change rate detection control section, 34 is a transmission data conversion section, 3
5 and 36 are transmission buffers, and 37 is a switch.

FIG. 5 is a flowchart of the change rate detection control section 33 shown in FIG.

The operation of the drawing meeting apparatus of this embodiment will be described below.

When you move mouse 1, sampling clock 11
According to the mouse input interface 2, the mouse data is an 8-bit X coordinate.

The X coordinate is converted into 8-bit coordinate data and output to the change rate detection control section 33, display control section 9, and transmission data conversion section 34. The display control unit 9 displays a cursor at a position on the display 10 indicated by the coordinate data obtained from the mouse input interface 2. The transmission data conversion unit 34
8-focus coordinate data obtained from mouse input interface 2 and the lower 2 pins 1- of this coordinate data deleted 6
The bit data is added with a start bit and a stop bit, respectively, and sent to the transmission buffers 35 and 3.
Output to 6. On the other hand, the change rate detection control section 33
As shown in the figure, the coordinate data (x, y) obtained from the mouse input interface 2 and the previous J and Y drift data (x
' + y' ), and the difference is the setting 4first.
・If it is larger, switch 37 to the transmission buffer 36 side; if smaller, switch 37 to the transmission buffer 3 side.
Switch to side 5.

The data output from the transmission buffer 35 or the transmission buffer 36 is modulated by the modem 5, frequency-multiplexed with the voice of the telephone by the frequency multiplexer 7, and output to the telephone line. In the case of reception, the frequency multiplexer 7 outputs the audio signal to the telephone 6, and the modulated data is output to the modem 5 and demodulated. The received data converter 8 converts the demodulated data between the start bit and stop bit into coordinate data, and the display controller 9 converts the demodulated data into the display 1 indicated by this coordinate data.
A cursor is displayed above 0.

In this way, when there is a large change in the input coordinates, such as when moving the cursor to another point, the number of bits of the coordinate data during movement is reduced and transmitted, so the amount of data to be transmitted can be reduced. can.

〔Effect of the invention〕

As explained above, the present invention is applicable to a drawing meeting device that transmits drawing data such as a cursor through a single telephone line, when the rate of change of input coordinates is large, or when the input coordinates do not move from within a predetermined range for a predetermined number of times. In this case, either do not send the coordinate data or reduce the number of points of focus of the coordinate data and send it. Therefore.

Since the amount of data to be transmitted can be reduced, simultaneity between the transmitting side and the receiving side can be ensured, and there is an effect that smooth meetings can be held.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a drawing meeting apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart 1 to auxiliary diagram showing the operation of the coordinate information control section in FIG. 1, and FIG. 2 is a diagram showing a second embodiment of the invention, and is a flowchart 1 and an auxiliary diagram showing a second operation of the coordinate information control section in FIG. 1. FIG. Further, FIG. 4 is a block diagram showing the configuration of a drawing meeting apparatus according to a third embodiment of the present invention, and FIG. 5 is a flowchart of the change rate detection control section of FIG. 4. 1. Mouse, 2. Mouse input interface, 3. Coordinate information control section, 4. Transmission data conversion section, 5. Modem. 6... Telephone, 7... Frequency multiplexing section, 8... Received data converting section. 9.Display control unit, 1o...Display, 11...Sampling clock, 33...Change rate detection control unit, 34...Transmission data conversion unit, 35.36...Transmission buffer, 37... ·switch.

Claims (1)

[Scope of Claims] 1. In a drawing meeting device that has a drawing input device and a display device and uses a telephone line or the like to bidirectionally transmit and receive drawing data to conduct a meeting, coordinate data is input from the drawing input device. a display means for displaying an index at the position of the display device indicated by the coordinate data; a communication means for transmitting and receiving the coordinate data with the other party; and detecting the rate of change of the coordinate data input from the coordinate input means. A drawing meeting apparatus comprising: a coordinate change speed detection means; and a data amount control means for controlling the amount of coordinate data to be transmitted in accordance with the change speed detected by the coordinate change speed detection means. 2. The coordinate change rate detection means includes a storage means for storing previous coordinate data, a calculation means for calculating the distance between the previous coordinate data stored in the storage means and the current coordinate data, and a calculation means for calculating the distance between the previous coordinate data stored in the storage means and the current coordinate data. 2. The drawing meeting apparatus according to claim 1, further comprising determining means for determining whether the distance calculated by the means is within a predetermined range. 3. The data amount control means transmits the coordinate data using the communication means when the change rate detected by the coordinate change rate detection means is within a predetermined change rate detection range; 2. The drawing meeting apparatus according to claim 1, further comprising transmission control means for not transmitting coordinate data at certain times. 4. The data amount control means transmits coordinate data in a large number of bits using the communication means when the change rate detected by the coordinate change rate detection means is within a predetermined change rate detection range; 2. The drawing meeting apparatus according to claim 1, further comprising coordinate bit number switching means for transmitting coordinate data using a smaller number of bits using said communication means when the coordinate data is outside the range. 5. Two change rate detection ranges, a first range and a smaller second range, are provided, and the data amount control means is configured such that the change rate detected by the coordinate change rate detection means is within the first range. When the coordinate data is outside the above range or within the above first range and within the above second range, the coordinate data is not transmitted, and when the coordinate data is within the above first range and outside the above second range. 2. The drawing meeting apparatus according to claim 1, further comprising transmission control means for transmitting coordinate data. 6. Two change rate detection ranges are provided, a first range and a smaller second range, and the data amount control means:
When the rate of change detected by the coordinate change rate detection means is outside the first range or within the first range and within the second range, transmit coordinate data with a smaller number of bits; Claim 1, further comprising coordinate bit number switching means for transmitting coordinate data with a larger number of bits when the coordinate data is within the first range and outside the second range.
The drawing meeting device described.