JP3284564B2 - Facsimile repeater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a facsimile repeater for facsimile communication. In particular, a facsimile repeater that uses a digital line between the facsimile transmitter and the facsimile repeater, uses a telephone line between the facsimile repeater and the facsimile receiver, and has a different line density system depending on the line. It is.

[0002]

2. Description of the Related Art Conventionally, a facsimile transceiver uses a digital line as a relay method to perform digital communication between the transceiver and the repeater, and establishes a telephone line between the relay and the final destination transceiver. There is a method of using and communicating.

[0003]

However, in such a conventional facsimile repeater, digital communication is performed between the transmitter and the repeater, and the CCITT (International Telegraph and Telephone Consultative Committee) standard for digital communication (G4 )), The image data is transmitted at the inch line density according to the control procedure, while the image data is transmitted in the millimeter system according to the CCITT standard using the subscriber telephone line between the repeater and the receiver at the final destination. Transmitted at linear density. Therefore, the repeater transmits the image data of the inch system linear density sent from the transmitter to the receiver of the final destination with the millimeter system linear density. Was distorted.

Here, the linear density in the main scanning and sub-scanning directions between the transmitter and the repeater is defined by the number of lines per inch. Between the repeater and the receiver, the linear density in the main scanning and sub-scanning directions is defined by the number per 1 mm.

For example, a main scanning line density of 200
When image data sent at 200 lines / inch and sub-scanning line density of 200 lines / inch is relayed to the final destination receiver at a main scanning line density of 8 lines / mm and a sub-scanning line density of 7.7 lines / mm Has shrunk (200 / 25.4) / 8 times in the main scanning direction.
It will extend by (200 / 25.4) /7.7 times in the sub-scanning direction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile repeater which can solve the above-mentioned drawbacks and can prevent a deterioration in image quality due to a difference in line density during relay.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a facsimile repeater provided with relay means for temporarily storing facsimile communication data from a transmitter and transmitting the data to a final destination receiver in accordance with a relay instruction from the transmitter. In the relay means, means for analyzing the communication protocol data from the receiver, outputting the linear density data and the destination information of the receiver, and analyzing the communication protocol data from the transmitter and transmitting the data from the transmitter. An analyzing unit including means for outputting the destination information of the receiver, a memory unit for storing the linear density data and the destination information of the receiver output by the analyzing unit, and the destination information from the transmitter output by the analyzing unit. A collation unit for collating the destination information stored in the memory unit; and a communication protocol based on the affirmative result of the collation unit. A creation unit for transmitting to the transmitter in addition to Rudeta, characterized in that it comprises a control unit for controlling the respective units based on the analysis result of the analysis unit.

Further, according to the present invention, a digital line can be used between the transmitter and the facsimile repeater, and a telephone line can be used between the facsimile repeater and the receiver at the final destination. .

[0009]

The relay means analyzes the communication protocol data from the receiver by the analysis unit, outputs the linear density data and the destination information of the receiver, analyzes the communication protocol data from the transmitter, and outputs the destination information from the transmitter. Output information. The memory unit stores the linear density data of the receiver and the destination information output from the analysis unit. The collation unit collates the destination information output from the analysis unit from the transmitter with the destination information stored in the memory unit. The creating unit adds the linear density data stored in the memory unit to the communication protocol data based on the affirmative result of the matching unit and transmits the data to the transmitter. The control unit controls each unit based on the analysis result of the analyzing unit.

As described above, it is possible to prevent the image quality from deteriorating due to the difference in line density during relaying.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a facsimile repeater according to an embodiment of the present invention.

In FIG. 1, the facsimile repeater includes a relay means for temporarily storing facsimile communication data from a transmitter and transmitting the data to a final destination receiver in accordance with a relay instruction from the transmitter.

Here, the present invention is characterized in that the relay means analyzes communication protocol data from the receiver and outputs linear density data and destination information of the receiver, and a communication protocol from the transmitter. Analysis unit 5 including means for analyzing data and outputting destination information from the transmitter
And a memory unit 1 for storing the linear density data and destination information of the receiver output by the analysis unit 5, and the destination information from the transmitter output by the analysis unit 5 and the destination information stored in the memory unit 1. A collating unit 2 for collating, a creating unit 3 for adding the linear density data stored in the memory unit 1 to the communication protocol data based on a positive result of the collating unit 2 and transmitting the data to a transmitter, and an analysis result of the analyzing unit 5 And a control section 4 for controlling the above-mentioned sections based on the control section.

A digital line is used between the transmitter and the facsimile repeater, and a subscriber telephone line is used between the facsimile repeater and the receiver at the final destination.

The operation of the thus configured facsimile repeater will be described. In FIG. 1, the memory unit 1 stores the linear density data transmitted from the receiver of the final destination together with the telephone number of the final destination. The collating unit 2 verifies whether the receiver of the final destination has previously communicated with this transmitter. The creation unit 3 creates communication protocol data by adding data from the memory unit 1. The control section 4 controls each section. The analysis unit 5 analyzes the communication protocol and outputs necessary data.

First, when the transmitter instructs the relay transmission to the final destination receiver, the transmitter transmits the G4 communication 200 PPI × 200 PPI to the relay, and then the relay transmits to the final destination receiver. G3 communication 8 lines / mm × 3.85
Send by book / mm. When the repeater communicates with the receiver of the final destination, the analyzing unit 5 causes the memory unit 1 to store the telephone number and the linear density of the receiver of the final destination via the control unit 4.
Next, when there is an instruction for relay communication to the receiver of the final destination, the analyzer 5 analyzes the telephone number of the final destination at the time of communication protocol data exchange between the transmitter and the relay, and outputs the same. The data is collated by the collation unit 2 to confirm whether or not the communication has been performed before, the communication is confirmed, the control unit 1 is notified, and the linear density data of the receiver at the final destination is input from the memory unit 1 to the creation unit 3. I do. The creating unit 3 absorbs the input data into the communication protocol data and outputs the data as communication protocol data with the transmitter. Thus, communication with the repeater is performed at a line density of 8 lines / mm × 3.85 lines / mm from the transmitter, and thereafter, transmission from the repeater to the receiver at the final destination is also performed with a line density of 8 lines / mm × Communication is performed at 3.85 lines / mm.

If communication has not been performed before, the telephone number and the linear density data of the receiver of the final destination are input to the memory unit 1.

[0018]

As described above, the present invention has an excellent effect of preventing deterioration of image quality due to a difference in line density at the time of relaying.

[Brief description of the drawings]

FIG. 1 is a block diagram of a facsimile repeater according to an embodiment of the present invention.

[Explanation of symbols]

 1 memory unit 2 collation unit 3 creation unit 4 control unit 5 analysis unit

Continuation of the front page (56) References JP-A-64-18366 (JP, A) JP-A-59-81974 (JP, A) JP-A-60-182257 (JP, A) JP-A-1-195576 (JP) JP-A-57-111154 (JP, A) JP-A-59-168760 (JP, A) JP-A-2-150158 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) H04N 1/00-1/00 108

Claims (2)

(57) [Claims] 1. A facsimile relay apparatus comprising: a relay unit for temporarily storing facsimile communication data from a transmitter and transmitting the data to a receiver of a final destination in accordance with a relay instruction from the transmitter. Means for analyzing the communication protocol data from the receiver and outputting the linear density data and the destination information of the receiver, and means for analyzing the communication protocol data from the transmitter and outputting the destination information from the transmitter. An analysis unit including, a memory unit for storing linear density data and destination information of the receiver output by the analysis unit,
A matching unit that compares the destination information from the transmitter output by the analysis unit with the destination information stored in the memory unit;
A creating unit that adds the linear density data stored in the memory unit to the communication protocol data based on the affirmative result of the matching unit and transmits the data to the transmitter, and controls the units based on the analysis result of the analyzing unit. A facsimile repeater including a control unit. 2. A facsimile relay according to claim 1, wherein a digital line is used between said transmitter and said facsimile repeater, and a telephone line is used between said facsimile repeater and said final destination receiver. Machine.