JPS63312773A - Facsimile receiver - Google Patents

Abstract

PURPOSE:To communicate a picture determined by a picture memory irrespective of the width of a charged recording paper by dividing the paper to widths which can be recorded and recording in the picture memory of the determined size. CONSTITUTION:The picture memory 2 of one page of a standard size stores a picture signal decoded in a decoder 1. A memory controller 3 measures the number of lines based on the decoded picture signal to detect that the picture memory 2 is filled or sequentially read the picture signal consisting of the picture elements of a horizontal width corresponding to the width which can be recorded by a signal detecting the break of the page. To the line buffer 4, the picture signal consisting of the picture elements of the horizontal width is applied and the read picture signal is recorded on the recording paper in a recording part 5. When only picture element data less than the number of the picture elements which can be recorded is left in the memory, the white picture element is added and stored in the buffer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile receiving device that can perform efficient recording and the like.

[Conventional technology]

In recent years, the demand for facsimiles has increased rapidly, but facsimile reading and recording sections are generally expensive, and there is a strong correlation between the size of the device and the reading and recording widths. It is being considered to reduce the reading width and recording width in order to increase the size and economy. For this reason, a facsimile machine having a paper width narrower than the international standard of A6 size or 86 size width is being considered mainly for home use. However, since A4 size is the minimum width as an international standard, the recording method used when receiving from an international standard device is to reduce the size on the receiving side.

For example, the number of pixels in the horizontal direction of A4 size, which is the standard for G3 facsimile, is 1728, which corresponds to a reading width of 215+nm. Therefore, for example, about 6 size width (1
When receiving an A4 width signal from an A4 facsimile with a non-standard width facsimile (A6 facsimile) equipped with a standard resolution recording unit (08mm), the number of pixels is 1728728 pixels, or 2 pixels, as shown in Figure 3A. It was common practice to thin out one pixel and record it. Also, for the vertical direction, roll paper is usually used, so originally A
6 facsimile can also record at the same magnification, but the horizontal
Since the data is thinned out to /2, the data is also thinned out in the vertical direction for every two lines, so in the end, the data is thinned out by 1/2.
It was common to record at a reduction of X1/2=1/4.

Conversely, as shown in Figure 3B, when transmitting from an A6 facsimile to an A4 facsimile, the number of pixels read (17
28/2=864) and further adds 864 pixels of white to convert it into a 1728728 pixel width signal before transmitting it. Furthermore, as shown in Figure 3C, when sent from one 6-facsimile to another 6-facsimile, as long as the procedure for standard A4 width signals is followed, the signal consisting of the 864 pixels read plus 864 white pixels is normally used. Since the data is sent assuming the A4 width, and this is thinned out to 1/2 x 1/2 on the receiving side, only 1/4 of the amount of information that could originally be recorded is actually used. Met.

[Problem that the invention seeks to solve]

Because conventional non-standard width facsimiles take the above-mentioned measures, information cannot be effectively recorded whether it is received from a normal standard facsimile or from a non-standard width facsimile of the same type. was there. That is, for example, when transmitting from an A4 facsimile and receiving by an A6 facsimile, the transmitted image information is 174
It is only used effectively. Also, when sending and receiving between A6 facsimile machines, the amount of information that could be recorded is only 1
/4 can only be used effectively.

Furthermore, conventionally, when an image signal to which white pixels are added is received, there is a problem in that unnecessary blank space is created on the recording paper.

This invention was made in order to solve the above-mentioned problems, and has a pixel memory having a predetermined capacity, and records the contents of this image memory multiple times as necessary. It is an object of the present invention to provide a facsimile receiving device that can effectively record image information both in communication with standard facsimile machines and in communication between non-standard width facsimile machines.

[Means for solving problems]

The facsimile receiving device according to the present invention has an image memory for an image portion corresponding to, for example, one page of a standard screen, and reads and records one screen by dividing it into multiple times from this image memory as necessary, so that the receiving side This makes it possible to effectively record the information sent regardless of the recordable width of the recording device or the width of the recording paper actually loaded.

[Effect]

In the facsimile receiving apparatus according to the present invention, when the image memory becomes full or a page break is detected, the facsimile receiving apparatus transmits the image by recording in units of width that can be recorded in the horizontal direction, for example.

The collected information can be used effectively.

〔Example〕

In FIG. 1, reference numeral 1 denotes an image signal decoder, which decodes an image signal encoded with a modified Huffman code or the like according to the G3 standard. 2 is an image memory for one page of standard size (A4 size).

The image signal decoded by the decoder 1 is input. 3 is a memory controller that measures the number of lines based on the decoded image signal and detects that the 1-image memory 2 is full or detects a page break and controls the 1-image memory 2.
An image signal consisting of pixels having a width in the horizontal direction corresponding to the recordable width of the loaded recording paper is sequentially read out. 4 is a line buffer to which an image signal consisting of pixels having the width in the horizontal direction is added. A recording unit 5 records the image signal output from the line buffer 4 on recording paper. 6 is an all-white detection circuit which detects whether the contents of the image memory 2 are white. When the recording of one line is completed, the information for the next line is sent from the image memory 2 to the line buffer 4, and when the required number of lines has been recorded, the information on the next line is transferred to the position shifted by the number of pixels already recorded on one screen in the image memory 2. The pixel bones corresponding to the remaining number of recordable pixels are read out from there and recorded in the same manner. At this time, if there is less pixel data left in the memory than the number of recordable pixels, white pixels are added and stored in the line buffer 4.

Next, the operation will be explained.

Figure 2 A shows the image signal sent from an A4 facsimile.
6 shows the case of receiving by facsimile.

In this case, an A4 width image signal consisting of 1728 pixels in the horizontal direction is received and written to the pixel memory 2, and then one page is divided from the pixel memory 2 into a left half and a right half, twice for 6 widths each. Record twice while reading. Therefore, all of the received image signals can be used.

Figure 2B shows the image signal transmitted from the 6th facsimile to A.
4 shows the case of receiving by facsimile.

In this case, the sending side adds 864 pixels of white to the A4
Transmit as a width signal. On the receiving side, the received image signal is written into the image memory 2 and then read out, thereby performing A6 width recording. Note that this case is substantially the same as the conventional example shown in FIG. 3B.

FIG. 2C shows a case where an image signal transmitted from an A6 facsimile is received by another A6 facsimile. In this case, there are restrictions on the G3 standard on the line, so 864
An A4 width signal is generated by artificially adding 864 white pixels to the pixel reading width. On the receiving side, after recording the 864-pixel width of the left half, it moves on to recording the right half, but since this is originally an artificially white area, the right half is naturally completely white. Therefore, the margin detection circuit 6 detects whether the remaining content of the image memory 2 is completely white, and if it is completely white, no recording is performed. Thereby, even when receiving from an A6 facsimile, recording can be performed without ejecting unnecessary paper.

As described above, in the cases shown in FIGS. 2A and 2C, what was conventionally reduced on the receiving side is recorded as one equivalent, and no information is lost.

In the above embodiment, an example was given in which the recording paper has a non-standard width and the image memory 2 has one standard size screen, but the optional standard for G3 is A4. Since there are also A3 and other sizes, using the present invention, you can install an 84 or A3 size image memory on a terminal that has standard A4 width recording paper, receive B4 or A3 size images, and record them in multiple A4 width recordings. It also becomes possible to do this.

〔Effect of the invention〕

As described above, according to the present invention, since the image memory has a predetermined size and records are divided into sections of each recordable width, the image memory does not depend on the width of the loaded recording paper. It is possible to communicate images of a size determined by There is an effect that there is no.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a facsimile receiving apparatus according to an embodiment of the present invention, FIG. 2 is a schematic diagram of recording according to the present invention, and FIG. 3 is a schematic diagram of recording in a conventional example. 1 is a decoder, 2 is an image memory, 3 is a memory controller, and 6 is a margin detection circuit. Patent applicant: Mitsubishi Electric Corporation Figure 1 Figure 2 A4FAX A6FAXA6FA
X A4FAXA6FAX
A6FAXAe)
A6 Written amendment of legal procedure (voluntary)

Claims (2)

[Claims] (1) An image memory that has a predetermined capacity and stores the received image signal; a recording section that records the image signal read out from the image memory; and the image signal is stored in the entire capacity of the image memory. or when it is detected that the image signal for one page has ended, reads an image signal corresponding to the recordable width of the recording section from the image memory,
A facsimile receiving apparatus includes a memory controller that controls the reading operation to be performed until the entire contents of the image memory are recorded. (2) An all-white detection circuit is provided that detects that all unrecorded portions of the contents of the image memory are white image signals and prohibits the recording section from recording the unrecorded portions. A facsimile receiving apparatus according to claim 1, characterized in that: