JPH0637996A - G4 facsimile equipment - Google Patents

Abstract

PURPOSE:To provide the G4 facsimile equipment transmitting the picture data in parallel when more than two picture data for the same subscriber number are stored in a picture memory in memory communication. CONSTITUTION:A G4 facsimile equipment 1 having a memory communication function is provided with a signal processing section 19 dividing one B channel into two if more than two picture data for the same subscriber number are stored in a picture memory 17 when being used in an ISDN line and transmitting the picture data in parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a G4 facsimile machine used in an ISDN line.

[0002]

2. Description of the Related Art Recently, two data channels (B channel; 64 kbps /) by one subscriber line (192 kbps).
Channel) and one control channel (D channel; 16 kb)
ps / channel) and ISDN (In
The services of integrated services DigitalNetwork) have spread, and have come to be used for telephone, G4 facsimile communication, computer communication and the like. Among them, especially in G4 facsimile communication and computer communication,
A large amount of information can be sent at high speed, but in the case of the G4 facsimile apparatus, an A4 standard document can be sent in about 3 seconds (about 20 seconds in the conventional G3 facsimile).

By the way, the G4 facsimile apparatus is provided with a large-capacity image memory, and has a memory communication function of temporarily storing the image data in the image memory and then transmitting or printing out the image data. Facsimile machines tend to communicate with specific subscriber numbers frequently. However, in the memory communication as described above, even when two or more image data for the same subscriber number are stored in the image memory, when the conventional ISDN line is used, a call operation is performed for each image data, Line connection, transmission, and line disconnection were repeated, and the time required for calling operation, line connection, and line disconnection was wasted. In addition, if the amount of one image data that has been transmitted first is large, the subsequent image data must wait for a long time until the transmission is completed.

[0004]

SUMMARY OF THE INVENTION The present invention is proposed in view of the above circumstances, and in memory communication, when two or more image data for the same subscriber number are stored in the image memory, It is an object of the present invention to provide a G4 facsimile apparatus that transmits the above image data in parallel.

[0005]

The present invention proposed to achieve the above object is a G4 facsimile apparatus having a memory communication function, which is used in an ISDN line.
When two or more image data for the same subscriber number are stored in the image memory, one B channel is divided into two,
A configuration is provided in which a signal processing unit that uses the B channel to transmit the image data in parallel is provided.

[0006]

According to the G4 facsimile apparatus of the present invention, two or more image data to be transmitted to the same subscriber number are accumulated in the image memory in the memory communication in which the image data is once accumulated in the image memory and then transmitted and received. In this case, one B channel is divided into two, and the two divided B channels are used to transmit the image data to the same subscriber number in parallel. There is no need to repeat the calling operation, line connection, transmission and line disconnection, and even if there is a large amount of one image data that should be transmitted first, the image that should originally be the next or later image Data can also be sent without waiting.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an example of a G4 facsimile apparatus according to the present invention, and FIG. 2 is a system diagram showing two-division communication of the G4 facsimile apparatus according to the present invention. In FIG. 2, point a is the calling side, and point b is
The point is the called party.

In FIG. 1, reference numeral 10 denotes a LAP-D (Link Access Procedure on) that controls a D channel that performs a connection service such as sending control information such as a protocol signal necessary for setting a B channel communication line to an exchange. D-Channe
l) Controllers, 11a and 11b are B channel controllers for sending data to B channels, 12 is a selector for selecting one of two B channels each time a line connection is made, 13 is a data bus (control bus is omitted), Reference numeral 14 is a key operation unit such as a numeric keypad, 15 is an image reading unit, and 16 is MH-encoded (one-dimensional encoded) or MR-encoded (two-dimensional encoded) received data, and vice versa. In addition, an encoding / decoding circuit that performs MH encoding (one-dimensional encoding) or MR encoding of the data read by the image reading unit 15, and 17 temporarily stores the image data read by the image reading unit or the received image data. Image memory to store, 18
Is a printer, and 19 is a signal processing unit including a microcomputer and the like.

The G4 facsimile apparatus 1 having such a configuration
The operation of will be described. In the memory communication in which the image data is once stored in the image memory 17 and then transmitted and received, at the time of transmission, first, a SET UP message of a protocol signal from the calling operation to the B channel connection is transmitted, as in the conventional case.
Transmission / reception of ALERT messages and the like is performed in the D channel via the LAP-D controller. Here, the signal processing unit 19 performs two-division communication to the called side when two (or more) pieces of image data for the same subscriber number are stored in the image memory 17 as shown in FIG. To the effect that User-us of the above SET UP message
er information element and transmit it via the LAP-D controller and D channel.

The signal processing unit 19 uses the above User-us.
er information element is transmitted, and a response message (a message indicating that two-way communication is possible) from the called side is received by the same User-user information element of the above-mentioned ALERT message, it is shown in FIG. In this way, 8 bits (16 bits / frame) for one channel of the B channel are divided into 4 bits of X and Y (8 bits / frame = 32 kbps), and the same two subscriber numbers (subscriber numbers) The image data is assigned to the calling party number), and the B channel controller 11a (or 11b) and the selector 1
2, LAP-D controller 10, transmit via B channel. When there is no response message from the called side, normal one-by-one transmission is performed.

The signal processing unit 19 determines whether another one (for example, X) of the two image data transmissions to the same subscriber number (callee number) is completed when another one (for example, X) is completed first. If there is no image data for the subscriber number (callee number), a USER INFO (user information) message of a protocol signal indicating that the two-division communication is terminated and Y transmission is continued to the callee side is sent to the LAP- It is transmitted via the D controller 10 and the D channel. Then, of the above two image data transmissions to the same subscriber number (callee number), the remaining 1
As shown in FIG. 4B, the image data of the case Y is transmitted as usual by using all 8 bits for one B channel. Steps 20 to 34 in FIG.
It is a flow diagram showing such operation.

Unlike the above, if there is another image data to the same subscriber number (callee number), the two-division communication is continued as it is and the other subscriber Start sending image data to the number (callee number). Up to this point, the transmission (calling side) has been described.
In the four-facsimile apparatus, the B channel two-division communication must be receivable even at the time of reception (the called side). The operation at the time of reception (called side) will be described below.

From the called operation to the B channel connection, the SET UP message of the protocol signal, AL
Transmission and reception of ERT messages and the like are performed on the D channel via the LAP-D controller 10. Here, the signal processing unit 19 performs the above S to the effect that the calling side performs the two-division communication.
When the User-user information element of the ET UP message is received via the D channel and the LAP-D controller, a response message (a message indicating that the two-division communication is possible) is sent in the same manner as in the above ALERT message.
It is transmitted by being placed on the ser-user information element.

The signal processing unit 19 includes a B channel and a LAP-
When the image data is received via the D controller 10, the selector 12, and the B channel controller 11a (or 11b), as shown in FIG. 4A, 8 bits (16 bits / frame) corresponding to one channel of the B channel are X, Y is divided into 4 bits (8 bits / frame) and stored in the image memory for each of X and Y.

The signal processing unit 19 uses the U of the protocol signal indicating that the two-way communication is terminated and the Y transmission is continued from the calling side.
SER INFO (user information) message,
When the D channel is received via the LAP-D controller 10, thereafter, as shown in FIG.
A normal reception operation is performed in which all 8 bits for channels are stored as Y data in the image memory. Steps 40 to 50 in FIG. 6 are flowcharts showing such an operation.

Since the received data stored in the image memory 17 is collected for each case in the image memory 17, it is not confused by being mixed at the time of print output. In addition, at the time of reception as described above, if an external printer is provided, it is possible to perform X and Y two print output operations at the same time.

[0017]

According to the G4 facsimile apparatus of the present invention, in the memory communication in which the image data is once stored in the image memory and then transmitted and received, two image data are transmitted to the same subscriber number in the image memory. When the above data is accumulated, one B channel is divided into two, and the divided two are used to transmit the image data to the same subscriber number in parallel. It is not necessary to repeat the calling operation, line connection, transmission, and line disconnection every time, and even if the amount of one image data that should be transmitted first is large, it should be the next or later. Image data can also be transmitted at a relatively high speed without waiting.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of a G4 facsimile apparatus according to the present invention.

FIG. 2 is a system diagram showing two-division communication of a G4 facsimile apparatus according to the present invention.

FIG. 3 is an explanatory diagram of a destination subscriber number and an input time in the image memory.

FIG. 4 (a) is a diagram showing the structure of one frame of an ISDN line, showing a state in which the B1 channel is divided into two. (B) is a diagram showing the structure of one frame of the ISDN line and shows a normal state.

FIG. 5 is a flowchart showing an operation of the G4 facsimile apparatus of the present invention during transmission.

FIG. 6 is a flowchart showing an operation at the time of reception of the G4 facsimile apparatus of the present invention.

[Explanation of symbols]

 1 ... G4 facsimile machine 10 ... LAP-D controller 11a, 11b ... B channel controller 12 ... Selector 17 ... Image memory 19 ... Signal processing unit

Claims (1)

[Claims] 1. A G4 facsimile apparatus having a memory communication function, which is provided when one or more image data for the same subscriber number is stored in the image memory when used in an ISDN line. A G4 facsimile apparatus, characterized in that the B channel is divided into two, and a signal processing unit that performs the above-mentioned image data transmission in parallel by using the B channel is provided.