JPH11136433A - Document transmission method in unidirectional catv network, facsimile interface device for transmission/ reception using the document transmission method, data transmitter-receiver for catv and document transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily accelerate data transmission and to freely select a document transmission/reception terminal in a document transmission system for transmitting and receiving image data by utilizing a unidirectional CATV network. SOLUTION: A facsimile is used for terminals for transmission and for reception, the signals of a voice band from the FAX 11 for the transmission are converted to digital signals by this FAX interface device 12 for the transmission and the digital signals are modulated by a CATV data transmitter 13 and sent out to the unidirectional CATV network 17. Modulated signals sent out to the unidirectional CATV network are demodulated to the digital signals by a CATV data receiver 14, then converted to the original signals of the voice band by the FAX interface device 15 for the reception and transmitted to the FAX 16 for the reception.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document transmission method for transmitting / receiving image data using a one-way CATV network, a facsimile interface device for transmission / reception using the document transmission method, and a data transmission / reception device for CATV. And a document transmission device.

[0002]

2. Description of the Related Art FIG. 2 shows a configuration of a conventional document transmission apparatus. Referring to FIG. 1, the document transmitting side includes an image scanner 21 for reading a document, an image scanner interface device 22, and a CATV data transmitting device 23. The document receiving side includes a CATV data receiving device 24, a printer interface device 25, and a document output printer 26. Then, the CATV data transmitting device 23 on the document transmitting side and the C
One-way CATV network 27 between ATV data receivers 24
Connected by

[0003] A CATV data transmission device 23 is for transmitting image data of a document read by the image scanner 21 to a one-way CATV network 27, and is a CATV data transmission device.
The data receiving device 24 is for receiving the image data transmitted through the one-way CATV network 27 and transferring it to the printer 26.

In the above configuration, the image scanner 2
1 is transferred from the image scanner interface device 22 to the CATV data transmission device 23, and is transmitted through the one-way CATV network 27 to the CAT.
The data is transmitted to the V data receiving device 24. The CATV data receiving device 24 receives the image data and transfers it to the printer 26 through the printer interface device 25 for printing.

[0005]

However, in the conventional document transmission apparatus as described above, in order to compress image data and speed up data transmission, an image compression circuit is provided on the transmission side and an image expansion circuit is provided on the reception side. Circuit is required. Further, the image scanner 21 used as a document transmitting terminal and the printer 26 used as a receiving terminal lack compatibility of models and interface conditions, and it is difficult to freely select a model and use it as a transmitting / receiving terminal.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and enables a high-speed data transmission easily, a document transmission method capable of freely selecting a document transmission / reception terminal, and a transmission using the document transmission method. It is an object of the present invention to provide a facsimile / reception facsimile interface device, a CATV data transmission / reception device, and a document transmission device.

[0007]

According to the present invention, there is provided a document transmission system for transmitting and receiving image data using a one-way CATV network, wherein a facsimile is used for a transmitting terminal and a receiving terminal. After converting the voice band signal from the transmission facsimile into a digital signal, the converted digital signal is modulated and transmitted to the one-way CATV network, and the modulated signal transmitted to the one-way CATV network is converted to a digital signal. After demodulation into a signal, the signal is converted into a signal in the original voice band and transmitted to the reception facsimile.

According to the present invention, the speed of data transmission can be easily increased, and a document transmitting / receiving terminal can be freely selected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a document transmission method for transmitting and receiving image data using a one-way CATV network, wherein a facsimile is used for transmission and reception terminals. After converting the voice band signal from the transmission facsimile into a digital signal, the converted digital signal is modulated and transmitted to the one-way CATV network, and the modulated signal transmitted to the one-way CATV network is converted to a digital signal. After demodulation to a digital signal, the signal is converted into a signal in the original voice band and transmitted to the receiving facsimile.

According to the present invention, by using a facsimile as a document transmitting / receiving terminal, the speed of data transmission can be easily increased without separately providing a compression / decompression circuit, and a document transmitting / receiving terminal can be freely selected. It has the action of:

According to a second aspect of the present invention, there is provided a transmission facsimile interface device used in the document transmission method according to the first aspect, wherein a signal in a voice band from the transmission facsimile is converted into a digital signal and transmitted. It performs facsimile communication with a trusted facsimile.

According to the present invention, a signal in a voice band from a transmission facsimile can be converted into a digital signal, so that facsimile communication with the transmission facsimile becomes possible.

According to a third aspect of the present invention, there is provided a receiving facsimile interface device used in the document transmitting method according to the first aspect, wherein the digital signal is obtained by demodulating a modulated signal transmitted to a one-way CATV network. Is converted into a signal in the original voice band, and facsimile communication with a receiving facsimile is performed.

According to the present invention, a digital signal obtained by demodulating a modulated signal from a one-way CATV network can be converted into a signal in the original voice band, and the facsimile communication with a receiving facsimile becomes possible. .

According to a fourth aspect of the present invention, there is provided a CATV data transmitting apparatus used in the document transmitting method according to the first aspect, wherein a signal in a voice band from a transmitting facsimile is converted into a digital signal. Modulates signal to one-way CAT
It is sent to the V network.

According to the present invention, there is an effect that a signal after converting a signal in a voice band from a transmission facsimile into a digital signal can be modulated and transmitted to a one-way CATV network.

According to a fifth aspect of the present invention, there is provided a CATV data receiving apparatus used in the document transmitting method according to the first aspect, wherein the modulated signal transmitted to the one-way CATV network is demodulated into a digital signal. It is.

According to the present invention, the modulation signal transmitted to the one-way CATV network can be demodulated into a digital signal.

According to a sixth aspect of the present invention, there is provided a unidirectional CATV.
A document transmission apparatus for transmitting and receiving image data using a network, comprising: a transmission facsimile and a reception facsimile;
A facsimile interface device for transmitting and converting facsimile communication with a facsimile for transmission and a digital signal from the facsimile interface device for transmission by converting a signal of a voice band from the facsimile device for transmission into a digital signal. A transmitting device for CATV data to be transmitted to a network, and the unidirectional CATV device;
CA that demodulates the modulated signal sent to the network into a digital signal
A TV data receiving apparatus, and a receiving facsimile that converts a digital signal demodulated by the CATV data receiving apparatus into an original voice band signal and sends the signal to the receiving facsimile, and performs facsimile communication with the receiving facsimile. And an interface device.

According to the present invention, by using a facsimile as a document transmitting / receiving terminal, the speed of data transmission can be easily increased without separately providing a compression / decompression circuit, and the document transmitting / receiving terminal can be freely selected. It has the action of:

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a document transmission apparatus for realizing the method of the present invention.

In FIG. 1, the document transmitting side comprises a transmitting facsimile (hereinafter referred to as a transmitting fax) 11, a transmitting facsimile interface device (hereinafter referred to as a transmitting fax interface device) 12, and a CATV data transmitting device 13. Is done. In addition, the document receiving side
TV data receiving device 14, receiving facsimile interface device (hereinafter referred to as receiving facsimile interface device) 15, and receiving facsimile device (hereinafter, receiving F
AX) 16. Then, the CATV data transmission device 13 on the document transmission side and the CAT on the document reception side
The V data receiving devices 14 are connected by a one-way CATV network 17.

A general G3 facsimile is used as the transmission FAX 11, and is connected to the transmission FAX interface device 12 by a modular cable. FAX interface device 12 for transmission is a FAX modem LSI
And converts a signal in a voice band transmitted from the transmission FAX 11 into a digital signal. Also, transmission FA
The X interface device 12 performs facsimile communication with the transmission FAX 11 by the FAX modem LSI, and
The image data and DCS standard command data transmitted from the AX 11 are transferred to the CATV data transmission device 13. C
The ATV data transmission device 13 modulates the image data and the DCS standard command data, and outputs a one-way CA signal using FR (high frequency signal).
Send it to the TV network 17.

The CATV data receiver 14 is a one-way C
It is connected to the ATV network 17 and receives data transmitted from the CATV data transmission device 13 and demodulates the original digital signal. Fax interface device 15 for reception
Is the same as the FAX interface device 12 for transmission.
A modem LSI is provided, and converts a digital signal transferred from the CATV data receiver 14 into a signal in a voice band. The receiving FAX interface device 15 performs facsimile communication with the receiving FAX 16 by the FAX modem LSI, and transmits the image data and DCS standard command data received by the CATV data receiving device 14 to the receiving FAX.
Transfer to 16. A general G3 facsimile is used for the receiving fax 16 and is connected to the receiving fax interface device 15 by a modular cable.

Next, the operation of the present embodiment configured as described above will be described.

A normal dedicated line G3 facsimile communication is performed between the transmission FAX 11 and the transmission FAX interface device 12, and the data compressed by the transmission FAX 11 is transmitted from the CATV data transmission device 13 to the one-way CATV network 1.
7 to the CATV data receiver 14.
Further, the compressed data received by the CATV data receiving device 14 is subjected to G3 facsimile communication between the receiving FAX interface device 15 and the receiving FAX 16, and the data is decompressed by the receiving FAX 16 and printed on a document.

Note that bidirectional facsimile communication is performed separately on the transmitting side and the receiving side, and only data is transmitted from the transmitting side to the receiving side in the one-way CATV network 17.

As described above, according to the embodiment of the present invention, the G3 facsimile is used for the transmission / reception terminal, and the image data compression / decompression circuit built in the facsimile is used to provide a conventional additional circuit. The speed of data transmission can be easily increased without providing a G3 facsimile, and by using a general G3 facsimile,
It can be used as the transmission FAX 11 and the reception FAX 16 irrespective of the model, and the transmission / reception terminal can be freely selected.

The transmission / reception FAX according to the present invention is not limited to the G3 facsimile, but may be a G4 facsimile.

[0030]

As described above, according to the present invention, the one-way C
In document transmission in which image data is transmitted and received using an ATV network, the use of a facsimile as a document transmission / reception terminal makes it possible to easily speed up data transmission without providing a separate compression / expansion circuit. This has the effect that the transmitting / receiving terminal can be freely selected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a document transmission apparatus for realizing the method of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional document transmission apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 FAX for transmission 12 FAX interface device for transmission 13 Data transmission device for CATV 14 Data reception device for CATV 15 FAX interface device for reception 16 FAX for reception 17 One-way CATV network

Claims (6)

[Claims] 1. A document transmission method for transmitting and receiving image data using a one-way CATV network, wherein a facsimile is used for transmitting and receiving terminals, and a signal in a voice band from the transmitting facsimile is converted to a digital signal. After the conversion, the converted digital signal is modulated and sent to the one-way CATV network, and the modulated signal sent to the one-way CATV network is demodulated into a digital signal. A document transmission method, wherein the document is converted and transmitted to the reception facsimile. 2. A transmission facsimile interface device used in the document transmission method according to claim 1, wherein a signal in a voice band from the transmission facsimile is converted into a digital signal, and facsimile communication with the transmission facsimile is performed. A facsimile interface device for transmission. 3. A reception facsimile interface device used in the document transmission method according to claim 1, wherein a digital signal obtained by demodulating a modulated signal transmitted to a one-way CATV network is a signal in an original voice band. A facsimile interface device for reception, wherein the reception facsimile communication is performed with the reception facsimile. 4. A CATV data transmission apparatus used in the document transmission method according to claim 1, wherein a signal after converting a voice band signal from a transmission facsimile into a digital signal is modulated to be one-way. A CATV data transmitting apparatus for transmitting to a CATV network. 5. A CATV data receiving apparatus used in the document transmission method according to claim 1, wherein said one-way CATV is used.
A CATV data receiving device for demodulating a modulated signal sent to a network into a digital signal. 6. A document transmitting apparatus for transmitting and receiving image data using a one-way CATV network, comprising: a transmitting facsimile and a receiving facsimile; and converting a signal in a voice band from the transmitting facsimile into a digital signal. A facsimile interface device for performing facsimile communication with a facsimile device for transmission, and a C signal for modulating a digital signal from the facsimile interface device for transmission and transmitting the modulated signal to the one-way CATV network.
An ATV data transmitting apparatus, a CATV data receiving apparatus for demodulating a modulated signal transmitted to the one-way CATV network into a digital signal, and a digital signal demodulated by the CATV data receiving apparatus in an original voice band. And a receiving facsimile interface device for performing transmission to the receiving facsimile and performing facsimile communication with the receiving facsimile.