JPH06291982A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To provide a facsimile equipment able to surely receive a signal from even an opposite equipment of a different unit system. CONSTITUTION:The facsimile equipment is made up of a printer section 5 in the inch or millimeter system, means (1, 2, 7) generating digital identification signal stating it that a picture scanning signal of either of the inch or millimeter systems is receptible and conversion means (1, 2, 7) providing an output to the printer section 5 as it is when the unit system of the sender side is the same unit system and converting the unit system into its own unit system and providing an output to the printer section 5 when the unit system differs. Thus, the communication from the facsimile equipment of the different unit system is surely received and the picture quality is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine. More specifically, the present invention relates to a scanning reference conversion technique in communication between facsimile devices of different unit systems.

[0002]

2. Description of the Related Art Generally, there are two types of facsimile machines, a millimeter system and an inch system, depending on a unit system as a reference. Then, as shown in FIG. 4, the array of scanning dots (pixels) is different for each unit system. That is, in the inch system, the dot intervals in the main scanning direction (for example, the moving direction of the thermal head) and the sub scanning direction (paper feeding direction) are both 0.127 mm, which is a square lattice shape. In the millimeter system, the main scanning direction is 0.125 mm and the sub-scanning direction is 0.130 mm, which is a rectangular grid shape that is vertically long.

Therefore, when facsimile devices of different unit systems communicate with each other, a digital identification signal (DI) is used by the receiving device to declare whether its own unit system is an inch system or a millimeter system.
S) is sent. Then, on the transmitting side, conversion processing such as dot thinning or interpolation is performed at the time of reading or thereafter, so that the receiving side can accurately print out the communication original.

[0004]

Such conversion has few problems in the main scanning direction. However, in the sub-scanning direction, the step angle of the stepping motor that drives the paper feed roller is fixed, so that the conversion may not be successful. Therefore, the current standard (CCIT
(Recommendation by T.), it is also allowed that the transmitting side does not perform conversion from the millimeter system to the inch system and sends it as it is.

Therefore, in particular, when the transmitting side is the millimeter system and the receiving side is the inch system, there is no guarantee that the inch system will receive. Therefore, there is a problem that the image cannot be received depending on the level of the transmitting side, or the image is distorted even if it is received.

An object of the present invention is to provide a facsimile apparatus which can always receive accurately and print clearly regardless of the conversion capability of the transmitting side.

[0007]

A facsimile apparatus according to the present invention comprises an inch-type or millimeter-type printer section, digital identification signal generating means for declaring that both millimeter-type and inch-type printers can be received, and a transmitting side. Means to identify whether the image signal from the system is a millimeter system or an inch system, and if the image signal is the same unit system as itself, it is output to the printer section, and if it is a different unit system, it is converted to the signal of its own unit system And a conversion means for outputting to a printer unit.

[0008]

The function of the facsimile apparatus of the present invention is as follows.
A declaration that "both millimeter and inch are possible" is sent as a digital identification signal. As a result, the transmitting side is allowed to transmit in the original unit system without any conversion on its own side. Further, if the unit system on the transmitting side is the same as the own unit system, it is printed out as it is, and if it is different, it is converted and then printed out.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a facsimile apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the facsimile apparatus of the present invention. FIG. 2 is a block diagram showing the internal structure of the modem of the facsimile apparatus, and FIG. 3 is a flow chart showing the operation of the facsimile apparatus of the present invention when receiving.

The facsimile machine shown in FIG. 1 is basically the same as a conventional facsimile machine having a communication data storage function, and only the control program is different. That is, the central processing unit (CPU) 1 follows the control program stored in the read-only memory (ROM) 2
It controls the communication circuit 3, the operation / display unit 4, the printer unit 5, the document reading unit 6, and the like. A control program for realizing the device of the present invention is stored in the ROM 2. Data to be stored during the processing procedure is held in the random access memory (RAM) 7.

The communication circuit 3 is an input / output control unit (NCU).
8 and a modem device 9 for signal modulation / demodulation. The operation / display unit 4 includes a key operation unit 10 and a liquid crystal display device (LC).
D) 11 is provided. The printer unit 5 also includes a storage processing circuit 12, a thermal head 13, and a thermal paper feed stepping motor M ₂ . The document reading unit 6 includes a charge coupled device (CCD) 15, an image processing circuit 16, and a document feeding stepping motor M ₁ . In this embodiment, an inch type facsimile apparatus is illustrated, and the stepping motors M ₁ and M ₂ are both inch type.

Reference numeral 18 in FIG. 1 is a clock circuit used for printing the reception time and for automatic transmission.
Is the backup battery. Each circuit is connected via a bus 20 for data, address and control, and is also connected via a direct control line 21.

FIG. 2 shows the configuration of the modem device 9, wherein 22 is a tone detection circuit and 23 is a tone generation circuit. 24 is 2400 bps, 4800 bps, 72
A high-speed modem (MODEM-V27terV29) having a modulation / demodulation speed of 00 bps or 9600 bps. This works when converting an image signal at high speed. On the other hand, 25 is a low speed modem (V21) having a processing speed of 300 bps. This low-speed modem 25 is used when the transmitting side and the receiving side make inquiries about the transmission speed or the unit system of the partner model by a binary code or reply before receiving the image signal. That is, at the beginning of communication, the low speed modem 25 is used so that binary code data relating to the communication procedure can be transmitted and received without fail. Then, after that, the high-speed modem 24 is switched to and the image signal is transmitted and received.

When the facsimile apparatus constructed as described above receives a message, as shown in FIG. 3, first, it is automatically received (step S ₁ ), and the incoming call is confirmed (step S ₁ ).
₂₎ sends a signal of the called station identification (CED) at a low speed modem (Step S _3).

Then, it sends its own receiving capability as a digital identification signal / non-standard function command (DIS / NSF) (step S ₄ ). That is, its own receiving ability (transmission speed, coding method, recording paper width, etc.) and the presence / absence of non-standard functions /
Tell the contents.

At this time, it is declared that it is possible to receive both the millimeter type and the inch type image operation signals, although it has only the inch type printer unit 5. This is done by setting both the 47th and 48th bits of DIS to 1.

Further, a reception command (DCS / NSS) is received from the partner machine (transmission side) (step S ₅ ), transmission / reception training is performed (step S ₆ ), and the result is checked (step S ₇ ). If OK is not output, a training failure (FTT) signal is transmitted and the training (step S ₆ ) is repeated. If OK sends an acknowledgment signal (CFR) (Step S _8).

Then, the image signal is converted into a high-speed modem and the image signal transmitted from the transmitting side in its own unit system is received (step S ₉ ). Further, the image signal to determine whether millimeter system or inch system (Step S _10). Then, for example, if the transmitting side is the same inch system as the receiving side, it is recorded as it is (step S ₁₁ ), and if it is the millimeter system, it is subjected to millimeter-inch conversion and then the image data is recorded (step S ₁₂ ). That is, 1 dot is thinned out every 127/2 dots in the main scanning direction, and 1 every 127/3 lines in the sub scanning direction.
Book interpolate.

Furthermore made a return-to-control after recording (RTC) (step S _13), returns to the step S ₉ of the receiver if there is a problem. The problem is to determine whether if the page end signal is out there (step S _14). If the procedure is interrupted (MPS), the process returns to the receiving step S ₉ . If the message end signal (EDM) is output, the process is restarted from step S _{4 of} the digital identification signal / non-standard function instruction.

If the procedure end signal (EOP) is output, a message confirmation (MCF) is transmitted from the transmitting side (step S ₁₅ ) and a line disconnection command (DCN) is received (step S ₁₆ ). the line is disconnected (step S _17).

In the above embodiment, the facsimile having the inch type printer has been described, but the same applies to a millimeter type facsimile machine. The flowchart of FIG. 3 shows the flow of the basic receiving procedure of the present invention, and various optional transmission / reception operations can be added thereto.

[0023]

As described above, the facsimile apparatus of the present invention always sends the image signal in its own unit system regardless of whether or not the model of the other party sending the data has a unit system conversion function. Then, print it as it is or after converting it to its own unit system. Therefore, a clear image can be obtained without conversion errors.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a facsimile apparatus of the present invention.

2 is a block diagram showing an internal configuration of a modem device in the facsimile device of FIG.

FIG. 3 is a flowchart showing the operation of the facsimile apparatus of the present invention when receiving.

FIG. 4A is an explanatory diagram showing an inch scanning pattern, and FIG. 4B is an explanatory diagram showing a millimeter scanning pattern.

[Explanation of symbols]

 1 central processing unit 2 read-only memory 5 printer section 7 random access memory 12 storage processing circuit

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[Procedure amendment]

[Submission date] May 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Further, the receiving command (DCS / NSS) from the other device (transmission side) is received (step S ₅ ), the transmission side is trained (step S ₆ ), and the result is checked (step S ₇ ). . If OK is not output, a training failure (FTT) signal is transmitted and the training (step S ₆ ) is repeated. If OK delivering reception preparation confirmation signal (CFR) (Step S _8). During the DCS (digital command signal), the other party
Information whether the machine will send in millimeters or inches
include.

Claims (1)

[Claims] 1. An inch-type or millimeter-type printer section, digital identification signal generating means for declaring that both millimeter-type and inch-type printers are receivable, and an image signal from the transmitting side is either millimeter-type or inch-type. If the image signal is in the same unit system as itself and the means for identifying
In the case of a different unit system, a facsimile device provided with a conversion unit for converting the signal of its own unit system and outputting it to the printer unit.