JPH08130633A - Copier with facsimile function - Google Patents

Abstract

(57) [Summary] [Object] To provide a copying machine with a facsimile function capable of reducing the number of times of accessing a RAM for rotation processing and shortening the processing time. An image memory for storing image data from an image input unit and for storing image data to be output to an image output unit is eight (or 16 or 32).
Individual) 1-bit data bus RAM, the map of the image memory is designated by the number of bytes and the number of lines for one line, and the selection of the RAM is controlled to rotate sequentially for each line. An image processing control unit is provided which controls input image data to be rotated and stored in an image memory, and which rotates image data in the image memory to be output to an image output unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, and more particularly to image data processing of a copying machine having a facsimile function.

[0002]

2. Description of the Related Art Conventionally, for example, a B5 original is set sideways (a long side of the original is orthogonal to the original conveying direction) and set in a facsimile, and A4 plain paper (where the long side of the copy paper is When printing in a direction parallel to the paper conveyance direction), the image data of the original can be rotated by 90 ° so that the image data can be printed on the receiving side without reduction.

When the original image data is rotated and transmitted by facsimile as described above, serial data from the image input means is serial / parallel (S / P) converted every 8 bits or 16 bits as shown in FIG. The image is stored in the image memory, and the address is changed 8 times or 16 times as the rotation processing, only 1 bit is read as an effective pixel from each address, the bit is collected to generate one byte data or word data, and the generation is performed. The encoded byte data or word data is encoded by a compressor and transmitted.

On the other hand, when the image data received by facsimile is rotated and the original is output, the received code data is decoded into one byte data or word data, and then the image is transmitted in reverse to the above-described transmission procedure. When the image data is expanded in the memory, byte data or word data is read from an address, only one bit of the data is rewritten, and the read-modify-write to write to the same address again is repeated 8 or 16 times and rotated. The image data is output to the image output means. Therefore, in the above-mentioned method, one code data or word data has to be accessed 8 times or 16 times for the image memory for the rotation processing, and there is a problem that the processing takes time. It was Although the above-mentioned problem occurs in communication between normal facsimile devices, image data communication is performed between a device in which a facsimile function is added to a copying machine having various sheets and a normal facsimile device. In some cases, there is a tendency that image data rotation processing is particularly required.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned conventional problems. The image leaf memory has eight 1-bit data bus RAMs.
By controlling the mapping of each RAM to the memory address, the image data from the image input means is rotated and stored with only one access per 8 bits, and the obtained image data is coded by normal access, and the facsimile is transmitted. Outputting the rotated image data with only one access per 8 bits at the stage where the code data transmitted and received by facsimile is decoded into the image memory by normal access and the image data is output from the image memory by the image output means. It is therefore an object of the present invention to provide a copying machine with a facsimile function that can reduce the number of times of accessing the RAM for rotation processing and shorten the processing time.

[0006]

To achieve the above object, the first means of the copying machine with facsimile function according to the present invention stores the image data from the image input means and the image data to be output to the image output means. The image memory is composed of eight 1-bit data bus RAMs,
The map of the image memory is controlled so that the number of bytes and the number of lines of one line are designated, and the selection of the RAM is sequentially rotated for each line, and the image data input from the image input means is rotated and stored in the image memory. In addition, the image processing control unit is provided for controlling the image data in the image memory to be rotated and output to the image output unit. The second means of the copying machine with a facsimile function according to the present invention is, in addition to the above-mentioned first means, 16 or 32 1 as an image memory.
It is characterized in that it is configured by a RAM of a bit data bus.

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram of an embodiment of a copying machine with a facsimile function according to the present invention, in which 1 is a CP
U, 2 are memories, 3 is a code memory, 4 is a communication control unit, all of which are connected to the system bus 5.
A compression / expansion device 6, a memory data port 7 and an I / O data port 8 are connected to the system bus 5, and the compression / expansion device 6 and the memory data port 7 are connected to the image bus 9.
, And the I / O data port 8 is directly connected to the image processing control unit 10.
An image memory 11, an image output unit 12, and an image input unit 13 are connected to the image processing control unit 10, and the image memory 11 includes eight 1-bit data buses RAM0 to RAM7.
It is composed by.

In the copying machine having the facsimile function configured as described above, when an image is input and transmitted by facsimile, the image processing controller 10 is operated by the CPU 1 for system control.
The number of bytes of one line at the time of transmission is set to n, and the image processing control unit 10 sets the mapping of each RAM 14 of the image memory 11 according to the number of bytes of one line to the arrangement described later and A start address for starting data accumulation, a start RAM number, the number of lines m, and a rotation mode are set. The image processing control unit 10 calculates the address of each RAM to start writing based on the set value supplied from the system control CPU 1 to obtain each R
Set the AM order.

Next, 1 output from the image input means 13
The serial data for each line is written into the image memory 11 once for every 8 bits, and when encoding, the image data is sequentially read from the head of the image memory when the image data for one page is prepared, and the compressor 6 is used. 1 byte unit or 1
The data is encoded in word units and transmitted by facsimile from the communication control unit 4. On the other hand, from facsimile reception to image output, similarly to the above method, when the received code data is expanded in the image memory and output, image data is output once every 8 bits from each RAM of the address calculated from the start address. Is read out, converted into serial data, and transferred to the image output means 12.

FIG. 2 is a diagram showing the mapping of the RAM 14, and is a state when the number of bytes of one line is set to n and the number of lines to m from the system control CPU 1 to the image processing control unit 10 as described above. Therefore, comparing line 0 and line n as shown in the figure, it can be seen that the RAM allocation is shifted by one. RAM like this
A method of storing an image captured by the image input unit 13 by rotating it by 90 ° when the image is mapped will be described with reference to FIGS. 3A and 3B. As shown in (a), in order to rotate an original having the number of bytes a and the number of lines b by 90 ° and store it in the image memory, first, as the number of bytes n of one line in the image memory, the number of lines b / 8 and the number of lines m. The number of bytes a × 8 is set as (However, the number of bytes n and the number of lines m are both multiples of 8.) That is, as shown in (b), since the original is stored in the image memory while being rotated 90 ° clockwise, the number of bytes n Is 1/8 of the number of lines of the document, and the number of lines is 8 times the number of bytes a of the document. In this case (90 ° rotation mode), the start CPU number is set to “7” and the start address for starting the accumulation is set to b / 8-1, so that the control CPU 1 moves in the direction in which the address of each RAM advances. 2 × (b / 8) -1, ... 8 × (b /
8) -1 is determined. After that, by transferring serial data from the image input unit 13 and sequentially performing serial / parallel conversion, writing can be performed by accessing once in 8-bit units, although the addresses of the RAMs are different.
FIG. 4 shows the case of the mapping shown in FIG.
It is a figure showing correspondence of each RAM when each rotation mode of 90 degrees, 180 degrees, and 270 degrees is set, and an arrow shows a direction in which an address advances.

As is apparent from the figure, in the case of the rotation mode of 0 °, the start RAM number is "0", 90 °.
"7" in the case of 180 °, "6" in the case of 180 °, 270 °
In this case, "7" is set, and the advancing direction of the address is determined according to each mode. That is, conventionally, RA
Since the configuration of M was performed in 8-bit units or 16-bit units, for example, in 90-degree rotation, the address was changed 8 times or 16 times, and the RAM was read or written one bit at a time. One RAM for each line, like the copier with the facsimile function according to the invention
By shifting and mapping the numbers (see FIG. 2), any RA, 0 °, 90 °, 180 °, or 270 ° rotation mode can be set.
M is arranged so as not to overlap.

In the above-described embodiment, the image memory 11 has been described by taking an example in which it is composed of eight 1-bit data buses RAM0 to RAM7, but the invention is not limited to this. For example, 16 or 32 By configuring the image memory 11 with the RAM of the 1-bit data bus,
The timing of creating serial data for the image input / output means 12 and 13 can be set to once every 16 bits or once every 32 bits, so that the number of accesses can be further reduced and the transfer rate of serial data can be improved. It becomes possible.

[0013]

As described above, the copying machine with the facsimile function according to the present invention has eight (or one) image memories.
6 or 32) 1-bit data bus RAMs and by setting an arbitrary number of line bytes, the RAMs are arranged so that the same RAM is not selected regardless of which rotation mode. In image input / output, the image memory does not need to be accessed multiple times for rotation processing and can be rotated with only one access. This shortens the rotation processing time and improves the transfer speed. can do.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a copying machine with a facsimile function according to the present invention.

FIG. 2 is a diagram showing mapping of a RAM used in a copying machine with a facsimile function according to the present invention.

3A and 3B are views for explaining a method of rotating an image by 90 ° and storing the image.

FIG. 4 is 0 °, 90 °, 180 °, 2 in this embodiment.
The figure which showed the correspondence of each RAM when each rotation mode of 70 degrees is set.

FIG. 5 is a diagram for explaining a case of rotating image data of a conventional document and transmitting the image by facsimile.

[Explanation of symbols]

1 ... CPU, 2 ... Memory, 3 ... Code memory, 4 ... Communication control unit, 5 ... System bus, 6 ... Compressor / decompressor, 7 ... Memory data port, 8 ... I / O data port, 9 ...
Image bus, 10 ... Image processing control unit, 11 ...
Image memory, 12 ... Image output means, 13.
..Image input means

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area H04N 1/21

Claims (2)

[Claims] 1. In a copying machine having a facsimile function, eight 1-bit data bus RAMs are used as an image memory for storing image data from an image input unit and image data to be output to an image output unit. The image memory map is controlled so that the number of bytes and the number of lines of one line are designated, and the selection of the RAM is sequentially rotated for each line, and the image data input from the image input means is rotated. A copying machine with a facsimile function, comprising: an image processing control unit for controlling the image data stored in the image memory, rotating the image data in the image memory and outputting the image data to the image output unit. 2. A copying machine with a facsimile function according to claim 1, wherein 16 or 32 1-bit data bus RAMs are used as image memories.