JPH0465962A - Still image transmitting equipment - Google Patents

Abstract

PURPOSE:To make it possible to successively and continuously transmit image information to plural other receiving stations through a subscriber's telephone line network by adding the telephone numbers(TNs) of residual receiving stations except the receiving station connected to a line to image data and sending the TN-added image data to the receiving station connected to the line. CONSTITUTION:At the time of receiving a number data signal NT including plural TNs, a line connection part 6 selects one of the TNs, transmits the selected TN through a transmission control part 8 to connect the receiving station with the selected TN to the line, and after connecting the line, forms and sends a number data signal NT consisting of the TNs of residual receiving stations except the receiving station connected to the line. A transmission signal forming part 7 adds the signal NT to an image data signal PT to form a transmission signal ST and transmits the formed signal ST to the receiving station connected to the line through the control part 8. Consequently, multiple address communication can be continuously attained by using a general subscriber's telephone line or the like even when a specific protocol for communication is not used.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a still image transmission device that transmits image data via a telephone line network, and particularly to a still image transmission device that transmits image data via a telephone line network, and in particular, a still image transmission device that transmits image data via a telephone line network. The present invention relates to a still image transmission device that transmits image data from one station to a plurality of other stations.

[Conventional technology]

Information transmission using still images is used for monitoring and TV conferences.

It is used for searching and communicating image databases, distributing various event information, etc. A conventional still image transmission device is connected to a subscriber telephone line network or a dedicated telephone line network through a single line, and a transmitting station and a receiving station perform one-to-one communication. Also, only the receiving station is connected to multiple lines, and the receiving station selects and receives image data from multiple transmitting stations.

[Problem to be solved by the invention]

The conventional still image transmission device described above performs one-to-one communication or selective multiple reception. This is because the telephone line itself is basically one-to-one communication. For this reason,
Still image data cannot be transmitted from a transmitting station to multiple receiving stations at the same time.

In particular, there is a strong demand for broadcasting image information such as event information and messages from the president to a plurality of receiving stations, but these demands cannot be satisfied. However, although broadcast communication is possible by using a branch connection using a dedicated line and a broadcast communication service using a facsimile line network, it may be uneconomical depending on the frequency of line use, or it may be difficult to connect to the facsimile line network. The transmission format must match facsimile procedures.

SUMMARY OF THE INVENTION An object of the present invention is to provide a still image transmission device that can sequentially transmit image information from one station to a plurality of other receiving stations via a subscriber telephone line network.

[Means to solve the problem]

The still image transmission device of the present invention transmits image data from one transmitting station to other receiving stations among a plurality of stations connected to a telephone line network through a plurality of lines and each assigned a unique telephone number. In the still image transmission system, the transmitting station includes a means for selecting one of the telephone numbers of the plurality of receiving stations and connecting it to the telephone number through an unused line among the plurality of lines, and a receiving station connected to the line. means for generating a transmission signal by adding telephone numbers of the remaining receiving stations 7 excluding the receiving station to the image data; and means for transmitting the transmission signal to the receiving station connected to the line; The station includes means for receiving the transmission signal from any of the plurality of lines, means for detecting image data from the received transmission signal, means for storing the detected image data, and means for detecting image data from the received transmission signal. means for detecting a telephone number; means for storing the detected telephone number; and one of the detected telephone numbers.
means for selecting one of the plurality of lines and connecting the line via an unused line from the plurality of lines, and adding the remaining phone numbers after removing the selected phone number from the detected phone numbers to the detected image data. This configuration includes means for generating a transmission signal using a plurality of lines, and means for transmitting the transmission signal through an unused line among the plurality of lines. Further, the plurality of stations may include the means for connecting the line, the means for generating the transmission signal, the means for sending out the transmission signal, the means for receiving the transmission signal, and the means for detecting the image data. , a means for storing the image data, a means for detecting the telephone number, and a means for storing the telephone number.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

First, a still image transmission device of a transmitting station will be explained. As shown in FIG. 1, the image data signal PT converted so that it can be transmitted over a telephone line is sent to an image data input terminal 104.
The signal is supplied to the transmission signal generating section 7 via. Further, a number data signal Nt indicating the telephone numbers of a plurality of receiving stations to which the image data is sent is supplied to the line connection section 6 via the number data input terminal 105. The two subscriber telephone lines are connected to the transmission control unit 8 via terminals 101 and 102, respectively.
It is connected to the. The transmission control section 8 has a function of selecting an unused line out of the two subscriber telephone lines and transmitting a signal. When the line connection section 6 receives the number data signal N7 including a plurality of telephone numbers, it selects one telephone number from among them and makes a call via the transmission control section 8 to establish a line connection. After the line is connected, the number data signal NT/
is generated and sent to the transmission signal generation section 7. The transmission signal generation unit 7 adds the number data signal Nt· to the image data signal PT to generate three transmission signals, and transmits them via the transmission control unit 8 to the receiving station connected to the line.

Next, the still image transmission device of the receiving station will be explained. FIG. 2 is a block diagram showing an embodiment of a still image transmission device for a receiving station according to the present invention, which also has the function of a transmitting station. The switching units 9 and 10 are for switching signals when functioning as a transmitting station, and the figure shows the case when functioning as a receiving station. The two subscriber telephone lines are connected to the reception control section 1 and the transmission control section 8 via terminals 101 and 102, respectively. The reception control unit 1 has a function of receiving a transmission signal from either of two telephone lines, and sends the received transmission signal SR to the image data detection unit 2 and the telephone number detection unit 3. The detection unit 2 detects the image data signal PR included in the received transmission signal SR and sends it to the image data output terminal 103, and also sends it to the image data storage unit 4 to store the image data. The telephone number detection section 3 detects the number data signal NR included in the received transmission signal SR, and sends it to the telephone number storage section 5 for storage. The line connection unit 6 selects one phone number from among the received phone numbers and makes a call via the transmission control unit 8 to connect the line. 0 After the line connection, the phone that received the phone number of the receiving station connected to the line A number data signal NR. consisting of the remaining telephone number removed from the number is generated and sent to the transmission signal generation section 7. The transmission signal generation section 7 reads the image data stored in the image data storage section 4, adds a number data signal, NR, to the read image data signal PR, and generates a transmission signal SR. to the next receiving station connected via the line. If a transmission signal is currently being received via the telephone line terminal 101, a line connection to the next receiving station and transmission of the transmission signal are performed via the telephone line terminal 102. By switching the switching units 9 and 10, the same configuration as that shown in FIG. 1 can be obtained, and the station can function as a transmitting station.

In this way, the receiving station sequentially connects the next line, adds the telephone number and image data of the remaining receiving stations, and transmits the data to the next receiving station, thereby making it possible to perform chain broadcast communication.

〔Effect of the invention〕

As explained above, according to the present invention, when transmitting,
If you select one of the receiving stations and make a line connection, add the telephone numbers of the remaining receiving stations other than this line-connected receiving station to the image data, send it to the line-connected receiving station, and receive it.
Extract the image data and telephone numbers from the transmitted signal, select one of them, connect to it using one line, and receive the telephone numbers of the remaining receiving stations except for the one connected to this line. By adding the data to the image data and transmitting it to the connected receiving station using the other line, and then connecting the next line in the same way and transmitting it, you can improve communication without using a special line. Therefore, without using a special protocol, broadcast communication can be realized in a chain manner using a general subscriber telephone line or the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a still image transmitting device for a transmitting station according to the present invention, and FIG. 2 is a block diagram showing an embodiment of a still image transmitting device for a receiving station according to the present invention. 1... Reception control section, 2... Image data detection section, 34
．． . Telephone number detection unit, 4... Image data storage unit, 5...
Telephone number storage section, 6... Line connection section, 7... Transmission signal generation section, 8... Transmission control section, 9, 10... Switching section, 101.102.-Telephone line terminal, 103.・-Image data output terminal, 104-・Image data input terminal, 10
5...1 number data input terminal, SA, S,,S,. ...Transmission signal, Pr, PR, PR...Image data signal, Nt, Nt,, NR...Number data signal.

Claims (1)

[Claims] 1. A stationary station that transmits image data from one transmitting station to a plurality of other receiving stations among a plurality of stations connected to a telephone line network through a plurality of lines and each assigned a unique telephone number. In the image transmission system, the transmitting station includes means for selecting one of the telephone numbers of the plurality of receiving stations and connecting the line via an unused line among the plurality of lines, and a receiving station connected to the line. means for generating a transmission signal by adding the telephone numbers of the remaining receiving stations excluding the image data to the image data; and means for transmitting the transmission signal to the receiving station connected to the line; , means for receiving the transmission signal from any of the plurality of lines, means for detecting image data from the received transmission signal, means for storing the detected image data, and a telephone number from the received transmission signal. means for detecting the detected telephone number, means for storing the detected telephone number, and means for selecting one of the detected telephone numbers and connecting it to the line through an unused line among the plurality of lines;
means for generating a transmission signal by adding the remaining telephone numbers after removing the selected telephone number from the detected telephone numbers to the detected image data; 1. A still image transmission device comprising: means for transmitting a transmission signal. 2. The plurality of stations include means for connecting the line, means for generating the transmission signal, means for transmitting the transmission signal, means for receiving the transmission signal, and means for detecting the image data. 2. The still image transmission apparatus according to claim 1, further comprising means for storing said image data, means for detecting said telephone number, and means for storing said telephone number.