JPS63287170A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent confusion on the reception side caused by an error recovery on the opposite side by editting a received original in a memory accumulation device after receiving an error re-transmission page, and print-outputting a received original only when receiving a normal re-transmission page. CONSTITUTION:A reception operation is started upon receiving an in-coming signal from the opposite transmitter, thereafter, the reception of a page is executed. A central processing unit 2, after receiving an erroneous re-transmission page, lets the memory accumulation device 5 edit a received original, and processes so that a reception original is outputted for printing only when a normal re-transmission page is received. By the processing unit 2, whether a reception page is normally received or not is checked, and in case a normal reception is judged, an image is outputted from a recorder 3. On the other hand, in case an abnormal reception of a page is judged, pages within a window size are determined NG.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to facsimile equipment.

[Prior Art] A conventional 64 facsimile device that complies with CCITT's T.62 Recommendation (control procedures for Teletex and Group 4 facsimile services) uses a CDU as shown in FIG.
Images are sent using I (command, document, user, information) signals.

Furthermore, according to the concept of window size, it is possible to send pages of the window size WS (integer value) without waiting for a response (RDPBP, ie, response, document, page, boundary, positive) from the other receiver.

An example of this is shown in FIG. 5, where WS=3.

Here, the window size WS is the number of pages that can be sent without waiting for a response from the other receiver. Note that FIG. 4 is a diagram showing the G4 communication protocol in the case of window size=1.

On the other hand, CCITT Recommendation T.62 stipulates that if an error is detected on the receiving side, a negative response of RDPBN (Response, Document, Page, Boundary, Negative) should be returned. In this case, the transmitting side cannot resume transmission using a predetermined method.

However, in the above conventional example, all of the pages marked with circles among the received page numbers shown in FIG. Duplicate output. Furthermore, since the first page is an error image, the received image of the first page is different from the received image of the first page output at the time of retransmission.

[Problems to be Solved by the Invention] Therefore, in the above-mentioned conventional device, since there are duplications etc. in the received images, even though the transmitting side retransmits the error and performs error recovery, some abnormality is detected. The operator on the receiving side may misunderstand that the information exists. In other words, there is a problem in that the error recovery of the other party's transmitter may cause confusion on the receiving side.

[Means for solving the problem 1] The present invention edits the received original in a memory storage device after receiving an error retransmission page, and prints out the received original only when the retransmission page is successfully received. It is something to do.

[Function] The present invention edits the received original in the memory storage device after receiving an error retransmission page, and prints out the received original only when the retransmission page is successfully received. Error recovery does not cause confusion on the receiving end.

[Example] FIG. 1 is a block diagram showing one embodiment of the present invention.

This embodiment includes a reading device l that reads an image when copying or transmitting, a central processing unit 2 that controls the entire device,
A recording device 3 that prints an image when copying or receiving, an encoding/decoding bag 214 that compresses or expands image information when transmitting or receiving a facsimile image, a memory storage device 215 that temporarily stores one image, and a facsimile communication A line control device 6 that sends and receives signals to the line used when performing
and has.

Further, the central processing unit 2 edits the received manuscript in the memory storage device 5 after receiving the error retransmission page, and prints out the received manuscript only when the retransmission page is normally received. It is.

Next, the operation of the above embodiment will be explained.

FIG. 2 is a flowchart showing the operation of the above embodiment, and FIG. 3 is a diagram showing an example of a communication protocol in the above embodiment.

In Figure 3, pages that have been confirmed to have no errors are marked with a circle, and only the pages with this circle are marked.
This is to be printed out by the recording device 3.

In the flowchart of Fig. 2, first, the device is initialized (sB, reception is started by receiving a call from the other party's transmitter (S2), then a page is received (S3), and the page is displayed normally. It is checked whether or not it has been received (S4).

If it is determined that the image has been received normally, the recording device 3 outputs the image (S5).

On the other hand, if it is determined that the page was not received normally, the page within the window size WS (page 3 in the above example) is marked as NG (S6), and if the communication is terminated (
S7), the above processing ends.

As described above, by outputting only pages in which no errors occur within the window size ws when the pages are completed normally, the error recovery of the other transmitter is communicated to the receiving side without confusion.

Note that when image information is received from the other party's facsimile terminal via the line, the line control device 6 transmits the image information to the encoding/decoding device 4.
Send image information to. When the encoding/decoding device 4 receives the image information, it decodes the image information and determines whether or not there is an error. If there is no error, the image data is sent to the memory storage device 5, and the central processing unit 2 causes the recording device 3 to print the image information stored in the memory storage device δ5. If an error occurs, the line control device 6 executes the protocol shown in Figure 3 and returns an RDPBH response, and then confirms that the image information was successfully received, including the image information retransmitted from the other party's facsimile terminal. The recording device 3 prints out only the information.

[Effects of the Invention] According to the present invention, there is an effect that error recovery of the other party's transmitter does not cause confusion on the receiving side.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the above embodiment. FIG. 3 is a diagram showing the communication protocol in the above embodiment. FIG. 4 is a diagram showing the G4 communication protocol in the case of window size=1. FIG. 5 is a diagram showing a conventional communication protocol. 1... Reading device, 2... Central processing unit, 3... Recording bag, 4... Encoding/decoding device, 5... Memory storage device, 6... Line control device. Patent Applicant Canon Co., Ltd. Agent Arata Yokubo - Fig. 2 Fig. 3 Fig. 4 SS SSP One-handed concubine individual 5th cause, sword ill I received Atheji NO, 4 without Tomoe No, NG<-ji NO■ ■ ■ ■ ■ ■ ■ ■

Claims (1)

[Claims] A facsimile machine, which edits the received original in a memory storage device after receiving an error retransmission page, and prints out the received original only when the retransmission page is normally received.