JPH0427290A - Still picture transmission device - Google Patents

Abstract

PURPOSE:To execute the artificial same communication by a general circuit, etc., by connecting two circuits of a telephone, making both the circuits receivable and transmittable, and transmitting data by adding a telephone number thereto in order to connect it to a second receiving station again from a first receiving station at the time of transmission. CONSTITUTION:Still picture data which is converted to a signal conforming to a telephone circuit and in which a necessary telephone number is added to the head is received by a receiving control part 1 connected to a telephone circuit 101, the telephone number is removed and a calling instruction is given to a transmitting control part 2, and also, image data (b) is supplied to a data reproducing part 4 and a data buffer 3. Subsequently, the contents of the buffer 3 pass through a telephone circuit 102 and are transmitted through a control part 2. In the same way, the data is received by the circuit 102, and transmission by the circuit 101 is executed. According to this configuration, a multi-function communication extending from the center to plural spots can be executed artificially by a general subscriber circuit and a digital circuit without using a leased circuit and a specific protocol.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a still image transmission device that transmits television signals via a narrowband transmission path.

[Conventional technology]

Conventionally, this type of still image transmission device connects a subscriber telephone line or a dedicated line to communicate between a transmitting station and a receiving station, or connects only the receiving device to multiple lines and communicates with multiple transmitting stations. There are devices that selectively communicate.

[Problem to be solved by the invention]

In the above-mentioned conventional image transmission apparatus, information transmission using images is used for monitoring, searching and communication of a TV*1 image database, distribution of various event information, and the like. In particular, for video distribution of event information, etc., it is impossible to satisfy the requirement of simultaneous transmission from a center to multiple locations.

Further, broadcast communication is possible by using a branch connection using a dedicated line or a broadcast communication service using a facsimile network, but in the case of a dedicated line, it becomes uneconomical due to the frequency of use of the line. In order to connect to a facsimile network, there are problems such as the need to adapt the transmission format to the facsimile procedure.

[Means to solve the problem]

The still image transmission device of the present invention includes a data converter that converts a video signal into a signal compatible with a telephone line and outputs it as first image data, and a data converter that stores received data and outputs it as second image data according to readout. a data memory for outputting, a switching device for selecting and outputting the first and second image data, and a first telephone number of a specified destination to be connected to the first or second telephone line. a transmission control unit that transmits a second telephone number and the image data to a line; and a reception unit that stores the second telephone number and image data received from the first or second telephone line in the data memory. It has a control section.

〔Example〕

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

1 and 2 are block diagrams of one embodiment of the present invention.

This embodiment includes a data converter 5 that converts a video signal from a terminal 104 into a signal compatible with a telephone line and outputs it as first image data a, and a data converter 5 that stores received data b and converts it into a second image data in response to reading. A data memory 3 that outputs image data C, a switch 6 that selects and outputs first and second image data a and c, and a first telephone number of the destination specified by terminal 105 or received data b. first or second telephone line 10
1. A transmission control unit that makes a call to 102 and transmits a second telephone number and image data to the connected line;
The reception control unit 1 stores the second telephone number and image data received from the telephone port 11101.102 in the data memory.

Next, the operation will be explained.

In FIG. 1, when image data is received from a telephone line 101, the reception control section 1 extracts the telephone number added to the image data, gives a call instruction to the transmission control section 2, and stores the image data b in the data memory 3. Make me remember. Also, reception from the telephone line 102 is prohibited. The transmission control section 2 calls the telephone line 102 using the telephone number for which the calling instruction has been received, and when connected, prohibits transmission from the telephone line 101, and reads the image data C from the data memory 3 and transmits it.

Further, the received data is given to the data reproducing section 4, and the reproduced video signal is outputted from the terminal 103.

Note that although the above description is for the case where the signal is received from the telephone line 101, the same applies to the case where the signal is received from the telephone line 102.

FIG. 2 has the functions of a transmitting station and a receiving station, and the video signal input from the terminal 104 is converted by the data converter 5 into a signal a that can be sent to the telephone line, and then passed through the switch 6 to the originating controller 2. supply to. The calling control unit 2 calls the first or second telephone number of the designated destination station input from the terminal 105 to either the telephone line 101 or 102, and transmits the second or first telephone number to the connected line. Image data C with added
Send out.

In this way, the video of the own station can be transmitted, and the received image data can be relayed and transmitted to other stations.

Furthermore, when transmitting data to the first receiving station or the second receiving station, it is also possible to easily insert the telephone number of the third receiving station. This makes it possible to repeat incoming and outgoing calls in sequence.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to connect two lines, receive from either line, and transmit to either line, and at the time of transmission, the first receiving station can re-transmit. The telephone number of the second receiving station for connecting to the second receiving station is added to the front of the image data and transmitted, and the telephone number of the second receiving station is extracted from the received data and the line is connected to the second receiving station. By having the function of connecting the receiver and sending the received data to a second receiving station, it is possible to realize a pseudo communication function on a general subscriber line or digital line without using a special line or protocol. It has the effect of

[Brief explanation of drawings]

1 and 2 are block diagrams of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Reception control part, 2... Transmission control part, 3... Data conversion part, 6... Switching device.

Claims (1)

[Claims] a data converter that converts a video signal into a signal compatible with a telephone line and outputs it as first image data; a data memory that stores received data and outputs it as second image data in accordance with reading; and the first image data. and a switching device that selects and outputs the first telephone number of the specified destination to the first or second telephone line and calls the second telephone number and the second telephone number to the connected line. and a reception control unit that causes the second telephone number and image data received from the first or second telephone line to be stored in the data memory. Still image transmission device.