JP2907069B2 - Flatbed scanner type facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flatbed scanner-type facsimile apparatus which scans a document set at a predetermined reading position.

[0002]

2. Description of the Related Art Recently, an ADF has been used in a facsimile machine.
Those having an (automatic document feeding) function are widely and widely used. According to this facsimile apparatus, the original can be fed automatically, so that labor can be saved and facsimile transmission can be performed quickly. However, in order to directly transmit image data of a thick original such as a book, the ADF function cannot be used. Therefore, the original is set at a predetermined reading position, and scanning is performed by scanning. A flat-bed scanner-type facsimile apparatus for transmitting is preferably used.

[0003] The operation of these facsimile machines is as shown in FIG. 4. Although image data (PIX) is transmitted, normal data cannot be transmitted due to noise on the line or the like, and the response is RTN (re-entry). If it is a training denial signal), the process ends abnormally. In this case, a message indicating an abnormal image quality of the transmission image is displayed to urge retransmission.

[0004]

However, in the above-described conventional facsimile apparatus, when image data cannot be transmitted and is retransmitted, in a facsimile apparatus having an ADF function, it is necessary to resend the original and read it. On the other hand, in a flat-bed scanner type facsimile machine, the original is still set at the reading position, so re-scanning can be performed again.However, after confirming the message, key operation or calling again Then, it was necessary to retransmit.

Accordingly, the present invention provides a flatbed scanner that can automatically and quickly execute retransmission processing by re-scanning a set original when image data of the original cannot be transmitted normally. An object of the present invention is to provide a facsimile machine.

[0006]

According to a first aspect of the present invention, there is provided a flatbed scanner-type facsimile apparatus for transmitting image data of a document set at a predetermined reading position. Then, when a negative acknowledgment signal is received from the receiving side, the set original is read and scanned again, and the image data is retransmitted. This is convenient because retransmission can be automatically performed without performing key operation or the like. Note that, as the negative acknowledgment signal, an RTN (retraining negative signal) of a facsimile communication procedure signal or the like is used.

A flatbed scanner type facsimile apparatus according to a second aspect of the present invention has a full-duplex modem, and transmits image data of a document set at a predetermined reading position during transmission. When a negative acknowledgment signal is received from the receiving side, the set original is read and scanned again, and the image data is retransmitted. Here, since a full-duplex modem is used, two-way facsimile communication can be performed at the same time, and the original can be read again from the beginning and retransmitted even during transmission.

According to a third aspect of the present invention, there is provided a flatbed scanner type facsimile apparatus according to the first or second aspect.
When the number of times the image data of the document set at the reading position is retransmitted exceeds a predetermined number, the communication speed is reduced and the retransmission of the image data is continued. Here, the predetermined number of times is set in advance to three times or the like, and if the number of retransmissions exceeds the predetermined number, the transmitting side performs fallback of the modem so that the error occurrence rate in the subsequent communication is reduced. So that transmission ends normally. Instead of lowering the communication speed, the line may be disconnected and the transmission may be terminated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of an internal configuration of a flatbed scanner type facsimile apparatus F according to the present invention. The facsimile apparatus F includes a modem for a signal processing unit 1 composed of a CPU or the like, and a facsimile communication control unit 2 for performing communication with an external facsimile apparatus or the like via a communication line L.
An image reading unit 4 for reading and scanning a document set at a reading position in advance, a storage unit 3 including a M3a or a RAM 3b; A section 5, a key operation section 6 having various operation keys, a display section 7 including a liquid crystal display and the like are connected.

A facsimile communication control unit 2 includes a circuit for mutually transmitting protocol signals,
A line control unit for controlling line connection with the communication line L is provided. Next, the basic operation of the facsimile machine F according to the present invention will be described with reference to FIG.

In the facsimile apparatus F of the present invention, real-time transmission is performed. After a document is set at a predetermined reading position on the contact glass surface, the key operation unit 6 is operated to change the telephone number of the other party. Input and instruct to start transmission. Then, a handshake is performed with the receiving side to scan and scan the original, and simultaneously transmit the image data (1) to (8). On the other hand, when a negative acknowledgment signal (RTN) is received from the receiving side (9), the set original is scanned again and the image data is retransmitted (10) to (13). Thus, the image data can be automatically retransmitted without receiving any operation after receiving the negative acknowledgment signal.

This operation is performed when the facsimile communication control unit 2 is provided with a modem for performing half-duplex communication. However, in the facsimile apparatus F of the present invention, the facsimile communication control unit 2 is provided with a full-duplex modem. In this case, two-way communication can be performed at the same time, so that a negative acknowledgment signal can be received even during transmission. At this time, when a negative acknowledgment signal is received from the receiving side, the set original is read and scanned again from the beginning, and the image data is retransmitted. According to this, since retransmission can be performed even during transmission, the overall communication time can be reduced as compared with the case of the half-duplex communication.

As described above, when a negative acknowledgment signal is received from the receiving side, the image data is retransmitted. When the number of retransmissions exceeds a predetermined number (for example, three times) set in the RAM 3b or the like in advance. Then, the communication speed is reduced and the image data is retransmitted. Then, the probability that an error occurs in the image data to be transmitted is reduced, and the reception of the negative acknowledgment signal from the receiving side is also reduced.

The communication speed may be changed stepwise from the current speed. However, when a negative acknowledgment signal is received even during retransmission immediately after the communication speed is reduced, the communication speed may be reduced to the next stage immediately.
The method is not limited. Next, the above-described operation will be described with reference to the flowchart shown in steps 100 to 107 in FIG.

In FIG. 1, the scanning of the original is scanned (step 1).
02) and image data transmission (step 103) are shown separately, but strictly speaking, data conversion and transmission are repeated each time several lines are read and scanned, and the image data of the set document is transmitted to the receiving side. Is sending to. If the number of retransmissions exceeds a predetermined number, the modem falls back (steps 105 and 106).
May be disconnected to end the transmission process (step 1).
07).

[0016]

As will be understood from the above description, according to the flatbed scanner type facsimile apparatus according to the first to third aspects of the present invention, a negative acknowledgment signal is received for transmitted image data. At this time, the set original can be read again and scanned as it is, and can be automatically retransmitted. Further, when resending, there is no need to perform key operations or the like, and there is no need to send and receive a protocol signal before resending, so that the time required for resending can be reduced as compared with a conventional facsimile apparatus.

In particular, according to the second aspect, the process can be shifted to the retransmission process even during the transmission of the image data for one page, so that the communication time is shortened and the communication fee associated therewith can be saved. Further, according to the third aspect, if transmission cannot be performed normally even after performing retransmission several times, transmission is continued after lowering the communication speed. Therefore, the possibility of normal transmission increases, and retransmission is wastefully repeated. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of the internal configuration of a flatbed scanner type facsimile apparatus of the present invention.

FIG. 2 is a diagram illustrating an example of a basic operation of the flatbed scanner type facsimile apparatus of the present invention.

FIG. 3 is a flowchart showing an example of a basic operation procedure of the flatbed scanner-type facsimile apparatus of the present invention.

FIG. 4 is a diagram illustrating an example of a basic operation of a conventional facsimile machine.

[Explanation of symbols]

 F ... Flat bed scanner type facsimile apparatus 1 ... Signal processing unit 2 ... Facsimile communication control unit 3 ... Storage unit 4 ... Image reading unit 5 ... Print output unit 6 ... Key Operation unit 7 Display unit L Communication line

Claims (3)

(57) [Claims] When a negative acknowledgment signal is received from a receiving side after transmitting image data of a document set at a predetermined reading position, the set document is read again and scanned. A flatbed scanner-type facsimile apparatus for retransmitting data. 2. A flat-bed scanner-type facsimile apparatus having a full-duplex modem, wherein a transmitting side transmits image data of a document set at a predetermined reading position. A flat-bed scanner-type facsimile apparatus wherein when a negative response signal is received, the set original is read and scanned again, and the image data is retransmitted. 3. The flat-bed scanner-type facsimile apparatus according to claim 1, wherein the communication speed is reduced when the number of retransmissions of the image data of the document set at the reading position exceeds a predetermined number. A flatbed scanner-type facsimile apparatus characterized by continuing retransmission of image data.