JPH0220171A - facsimile machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

[Prior Art] CCITT Recommendation 02. The minimum original size of a normal facsimile machine conforming to the G3 standard is A4 size. On the other hand, in recent years, small facsimile devices such as
A5. Devices that send and receive small documents such as A6 size are also often used.

The following method is known for transmitting a document from such a small facsimile machine to a normal facsimile machine.

Generally, when a facsimile machine sends original documents.

The sending side and the receiving side each notify the other side of the document size of their own devices in a transmission control procedure.

Now, for example, a small A6 size facsimile machine is
When transmitting a document to the above-mentioned A4 size normal facsimile device, the small facsimile device notifies that the document size is A4 size in the transmission control procedure. When sending the image, the image information for each line of A6@ is
Adding the image information of white "'', create one line of image information corresponding to A4111g, and send this. On the other hand, the receiving side receives the image information and records it as usual. As a result, the A6 size received image is recorded on the left half of the A4 size recording paper.

On the other hand, in recent years, facsimile communication using car telephones has become commonplace. In the case of a car phone, since a wireless line is used, the condition of one line is likely to deteriorate, and errors in transmitting image information are likely to occur.

[Problem to be solved by the invention] When transmitting a document, a facsimile machine conforming to the G3 standard, etc.
E that encodes the image information of each line and indicates the end of the line
Add the OL code and send. The receiving side extracts 1942 minutes of image information by identifying the EOL code in the received information and checks for errors.

However, the EOL code itself may cause a transmission error. When this EOL code becomes an error.

Since the receiving side cannot correctly detect line breaks, it must extract multiple lines of image information as one line of image information and check for errors. At this point, it is determined that the image information is in error. However, since the number of error lines cannot be determined, for example, one white line is recorded on the recording paper.

In this way, conventionally, when an error occurs in the EOL code,
Since the number of error lines cannot be determined, there is a problem in that the operator cannot determine how much of the original image is missing by looking at the recorded received image.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile apparatus that can solve the above problems and determine the range of a document image that is missing due to a transmission error.

[Means for Solving the Problems] For this purpose, the present invention provides that when a sending document width is narrower than the recording paper width of the receiving side from the sending side to the receiving side, the sending side can scan the original document line by line. A certain amount of image information in which the pixel positions of at least white or black pixels are sequentially shifted for each l line is added to the information to create image information for each line corresponding to the recording paper width on the receiving side, and the recording paper width is While the receiving side sends it as image information of 1. The image information of each line is received, the pixel position in the certain amount of image information added on the sending side is detected, and the pixel position is temporarily stored, and each line of the image information received due to a transmission error is If the line cannot be identified, then
Based on the difference between the pixel position detected when receiving line image information and the previously stored pixel position,
The present invention is characterized in that the number of lines in which a transmission error has occurred is determined, and an image indicating the occurrence of an error is recorded on the recording paper in accordance with the number of lines determined to be 1.

[Operation] On the receiving side, if there is a transmission error, a mark indicating the occurrence of the error is recorded at the corresponding position of the received image, so the operator can easily determine the range of the original image that is missing due to the transmission error. You will be able to do this.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a block diagram of a facsimile communication system according to an embodiment of the present invention. In the figure, facsimile station A is installed with an A6 facsimile machine IA that sends and receives A6 size originals, and facsimile station B is installed with an A4 facsimile machine In that sends and receives A4 size originals. Both are connected to the public communication network X. Facsimile station A communicates with another facsimile station (not shown) equipped with six machines connected to public communication network X, and facsimile station B also communicates with
Similarly, it communicates with other facsimile stations equipped with A4 machines.

In addition, this embodiment has a function of transmitting an A6 size document from facsimile station A to facsimile station B.

FIG. 2 shows a block diagram of facsimile stations A and B, and the only difference between facsimile stations A and B is the difference in facsimile families [1^ and 18]. In the figure, a facsimile device 1A or IB is connected to a car telephone radio device 3 via an interface device 2. Further, a handset 4 is connected to the interface device 2 .

In the facsimile machine LA or IB, the scanner 11 reads the original image and extracts the image information.
The facsimile device IA reads an A6 size document, and the facsimile device IB reads an A4 size document. The linear density of the scanner 11 when reading an original is 8 dots/llll11 in the main scanning direction and 3.1 dots/llll11 in the sub-scanning direction.
85 pieces/llll11. Therefore, in the case of A4 size, the original image is read at 1728 bits per line and 1140 lines per page. Further, in the case of A6 size, reading is performed at 864 bits per line and 570 lines per page.

The plotter 12 records the received image on recording paper, the plotter 12 of the facsimile device IA records the received image of A6 size, and the plotter 12 of the facsimile device 1B records the received image on recording paper.
records the received A4 size image.

The encoding and decoding unit 13 encodes image information to be transmitted and decodes received image information. The image information processing unit 14 adds a predetermined amount of image information to the image information of each line of the original image to be transmitted, or adds a predetermined amount of image information to the image information of each line of the received original image, based on the image information added on the transmitting side of the received image information of each line. The number of lines in which a transmission error occurred is determined.

The modem 15 modulates and demodulates image information and transmits the same, and also transmits various procedure signals in transmission control procedures. The communication control unit 16 executes transmission control based on the IECH and executes predetermined facsimile transmission.

The operation display section 17 is used to display operation guidance and the like and to perform various operations.

The system control section 18 is composed of a microcomputer system, and controls each section mentioned above to execute predetermined operations of the facsimile machine.

Next, with the above configuration, the operation when transmitting a document from facsimile station A to facsimile station B will be explained.

In this case, the operator of facsimile station A calls facsimile station B by performing a predetermined operation on the handset 4, notifies the other party's operator that the original is to be sent, sets the original to be sent on the scanner U of facsimile machine 1A, and Perform a sending operation on the operation display section 17. As a result, facsimile machine IA starts transmission processing.

That is, as shown in FIG. 3, facsimile machine IA executes a predetermined protocol when destination facsimile machine IB responds. In this case, facsimile group @L
A sends a procedure signal OC8 or NSF to the IB for communication in the special mode described in this embodiment, that is, the own device
6, it is notified that image information corresponding to an A4 document will be transmitted (process 101).

First, the variable n indicating the reading line of the original image on the control program is reset to n=O (processing 1).
02). Next, one line of the original image is read.

Since the original to be sent is an A6 original, image information of 864 bits per line is extracted (process 103).
.

Next, after incrementing the variable n by +l (process 104), for the 864-bit image information extracted above, (864-n) bits of image information indicating a white pixel and 1-bit image information indicating a black pixel are added. information and (n-1) bits of image information indicating a white pixel are sequentially added. This results in 1728 bits of A
Image information of 1 line corresponding to 4M draft is obtained (processing 1
05), then encode this one line of image information and
Send with an EOL code indicating the end of the line (
Process 106).

Then, if the variable n=570, that is, the end of one page cannot be determined (process 107), if it is not the end of one page (
N in process 107) Return to image reading of the first line (proceed to process 103).

As a result, as shown in FIG.
The image information of each line of 864 bits up to 570 is as follows:
864-bit image information is added to each image, and the information is transmitted as 1728-bit A4 size image information. Further, in the added image information, black pixels are set at positions sequentially shifted by one bit.

Then, when the processing of one page of the transmission document is completed (processing 1
07 Y), it is determined whether there is a next page (processing 108). Here, if there is a next page (v in process 108), it is transmitted in the same way (to process 102), but if there is no next page (N in process 108), the above transmission process ends.

On the other hand, the operator of facsimile station 8 responds to the call from facsimile station A and performs a reception operation on operation display section 17 of facsimile machine IB. As a result, facsimile machine IB starts receiving processing.

That is, as shown in FIG. 5, the facsimile machine IB executes a predetermined protocol with the destination facsimile machine IA, thereby identifying that the communication is in the special mode as described above ( Processing 201).

First, set the variable P = 1729 (process 202
).

Next, the transmitted image information is received, the above l1OL code is detected, and image information for l lines is extracted (processing 2).
03), to compose (processing 204). During this decoding process, various encoding codes are checked, and the number of bits of the image information obtained by decoding is also checked. Thereby, it is determined whether or not the received image information for one line was a transmission error (process 205).

Here, if the received data is correct (V in process 205),
865 to 17 of image information for one line with 1728 bits
Find the bit position of the black pixel in the 28th bit, that is, the 864-bit image information added to the original image information on the sending side, and set that bit position as variable P (process 206).
. Next, the variable P. Find the difference between and P□, and calculate the difference P0 and P
If the number of lines is 1 (Y in process 207), the plotter 12 records the image information of that one line on recording paper (process 208).
).

Next, if it is determined that the reception of one page of the original has been completed (process 209), or if the reception of one page has not been completed (N of process 209), the variable P□ is set to P. Tooki (processing 21o)
, returns to extracting the image information of the next line (processing 203
fart).

If there is no data error in the received image information, the above variable P
. The difference between and Pl is always 1. Therefore, in this case, as shown in FIG. 6a, in this case, the A6 size original image and the diagonal line image L based on the image information added on the sending side are sequentially recorded on the recording paper one line at a time, as shown in FIG. 6a. Ru.

By the way, as shown in FIG. 7, the sending facsimile machine IA assigns EOL codes to the encoded image information nu-n of lines i-i+3 of the original image, and sends them to the facsimile machine 1B. Suppose that they are sent sequentially. Also, here, a transmission error occurs and, for example, line i
Suppose that the E-Ko code of ll has an error.

Then, on the receiving side facsimile machine 1B, line i
After the EOL code of , the image information (n, +n2) until the EOL code of line i+2 is detected is extracted as the image information of 1 line.

In this case, by checking the data, it is determined that the image information is in error. In this case (N in process 205
), no image is recorded and the process returns to the next line (proceed to process 203). Then, the E code of the next line j÷3 is normal (V in process 205), so here it is.

The black pixel position of the current line i÷3 is set to the variable P (processing 206). Next, the difference between this variable P and the variable P at the previous line i is determined (process 207
). In this example, the difference in variables P, -P, = 2,
It is determined that there are two error lines. Also,
Similarly, if the EOL code fails continuously,
The number of error lines in that case is determined.

When it is determined that there is an error line like this (
Step 207 (N): For example, as shown in FIG. 6, certain marks corresponding to the number of error lines are recorded on the recording paper to indicate the error position (process 211).

Next, in the same manner as described above, normal image information is recorded line by line (proceeding to step 208), thereby obtaining one page of received images as shown in FIGS. 6a-c.

When one page has been received (V in process 209), it is determined whether there is a next page (process 212), and if there is a next page (V in process 212), the same process is performed (process 2).
to 02). Also, if the next page runs out (processing 212
(N) End one or more reception processes.

As described above, according to this embodiment, from the A6 facsimile machine IA to the A4 facsimile machine I
When sending a manuscript to B, the sending side should:
A certain amount of image information in which the position of black pixels is sequentially shifted for each line, that is, a diagonal line image, is added to the image information of the document line by line, and the resulting image is transmitted as an A4 image. Then, the receiving side receives the image information, detects the position of the black pixel of the diagonal line image added on the transmitting side, determines the number of lines that have caused a transmission error, and according to the number of lines determined as 1. A margin or text indicating the occurrence of an error is recorded on the recording paper.

As a result, on the receiving side, if there is a transmission error, a blank space equivalent to the error line will be created at the corresponding position of the received image, and a character indicating the error will be recorded, so the operator can The range of the original image can be easily determined.

In the above embodiment, the case where a document is sent from an A6 machine to an A4 machine has been described, but the present invention is not limited to this.

The invention is not limited to these sizes, but can be similarly applied to cases in which the width of the transmitted document is generally narrower than the width of the recording paper.

In addition, on the receiving side, in the event of a transmission error, a certain mark indicating the error is recorded, but if there is a certain number of error lines, the error is indicated by text, for example, as shown in Figure 8. You can do it like this. Also, I added a diagonal line image, which is a straight line, to the original image, but the diagonal line is a zigzag line as shown in Figure 9! , 2, or various preset patterns, code patterns, etc.
Other images can be used as long as the positions of white or black pixels are shifted line by line.

Furthermore, it goes without saying that the present invention is not limited to facsimile machines that use car telephones, but can be similarly applied to various facsimile machines that use ordinary telephone lines or wireless devices.

[Effects of the Invention] As described above, according to the present invention, from the sending side to the receiving side,
When transmitting a transmission document width that is narrower than the recording paper width of the receiving side, the transmitting side adds a fixed pattern image to the original image and transmits it as an image of the recording paper width, and if a transmission error occurs, the receiving side The number of error lines is determined based on the image of the above fixed pattern, and an image indicating an error is recorded on the recording paper according to the number of error lines, so the operator can check the range of the document image that is missing due to a transmission error. can be easily distinguished.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of a facsimile communication system according to an embodiment of the present invention, FIG. 2 is a block configuration diagram of each facsimile station, FIG. 3 is an operational flowchart of transmission processing, and FIG. 4 is image information to be transmitted. 5 is an operational flowchart of the reception process, FIG. 6 is an explanatory diagram of the image recorded on the receiving side, and FIG. 7 is an explanatory diagram of the image information of each line to be transmitted.
FIG. 8 is an explanatory diagram showing another embodiment of the recording image on the receiving side. A, El...Facsimile station, IA, IB...Facsimile device, 2...Interface device, 3...
Car telephone radio equipment, 4...Handset, 11...
- Scanner, 12... Plotter, 13... Encoding/decoding unit, 14... Image information processing unit. 15...Modem, 16...Communication control unit, 17...
Operation display section, 18... system control section. 1A Figure B Figure B

Claims (1)

[Claims] In the sending and receiving facsimile devices, the width of the original on the sending side is narrower than the width of the recording paper on the receiving side, the sending side includes an image reading means for reading the image of the sending original and extracting image information line by line; A certain amount of image information in which the pixel position of at least one white or black pixel is sequentially shifted for each line is added to the above image information for each line, and each line corresponding to the width of the recording paper on the receiving side is added. The receiving side includes an image information adding means for creating image information of a line, and a transmitting means for transmitting the created image information of each line to a receiving side. a pixel position detection means for detecting the pixel position of the white or black pixel in the certain amount of image information added on the transmitting side of the received image information; a pixel position storage means for storing the black pixel position, and a pixel position for correctly receiving and detecting one line of image information next time when each line of the received image information cannot be identified due to a transmission error; a line number determining means for determining the number of lines in which a transmission error occurred based on the difference from the previously stored pixel position; and recording an image indicating the occurrence of an error on recording paper in accordance with the determined number of lines. A facsimile device comprising: error recording means.