JPH0831951B2 - facsimile - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a facsimile using a subscriber telephone line.

[Prior Art] Generally, a facsimile includes a reading system that optically reads the content of a document to be transmitted and converts it into an electric signal, and a recording system that makes a hard copy to a printer or the like based on a received signal or the like.
It is composed of a controller for controlling the reading system and the recording system.

Then, in the conventional facsimile, a memory for transmission and a memory for recording received data are separately provided,
In addition, when copying, it was general to execute without using memory.

However, with such a configuration, the flow of image data becomes independent between the modes, and there is a problem that the control of the memory is complicated.

[Object of the Invention] It is an object of the present invention to provide a facsimile in which the memory capacity of a storage unit required as a facsimile can be reduced and the writing / reading control can be simplified. is there.

More specifically, in a facsimile having a copy mode and a transmission / reception mode, a reading unit that reads a document image and image data obtained from the reading unit is used as an MH code or
First encoding means for encoding an intermediate code that can be encoded into an MR code, receiving means for receiving image data of an MH code or MR code, and first decoding means for decoding received image data of an MH code or MR code into an intermediate code 1 decoding means, first
A storage unit having a storage capacity of at least one sheet for temporarily storing the original image data of the intermediate code from the encoding unit and the received image data of the intermediate code from the first decoding unit, and the storage unit. Second decoding means for decoding the image data of the intermediate code into raw image data;
In the copy mode, the recording means for recording the raw image data obtained by the decoding means in page units, and in the copy mode, the storage means is used as a buffer for temporarily storing a predetermined number of lines of less than one page for reading and recording. On the other hand, in the receiving mode, on the other hand, it has a control means for starting the recording by the recording means after the storage of the image data of the intermediate code for one page in the storage means is completed. It is intended to provide a characteristic facsimile.

Embodiment of the Invention FIG. 1 is a block diagram showing an embodiment of the present invention.

In the above embodiment, the image reading unit 10 as an image reading system is used.
0, a laser printer 200 as a recording system, and a controller C for controlling the image reading unit 100 and the laser printer 200.
Have and.

 FIG. 2 is a perspective view showing the image reading unit 100.

A predetermined document is inserted from the document insertion unit 110, the image information is converted into an electric signal by an image reading unit provided inside, and the document is discharged from the discharge tray 120. Further, the image reading unit 100 is provided with an operation panel 130,
A controller C that controls the image reading unit 100 and the laser printer 200 is built in.

 FIG. 3 is a diagram showing the operation panel.

The operation panel 130 executes standard mode, fine mode selection, mini-fax, halftone designation, dial operation of partner station, and other functions.

FIG. 4 is a longitudinal sectional view showing an example of the laser printer 200.

The laser printer 200 includes an exposure device 210 and a developing unit.
220, paper feed cassette 230, transfer unit 240, and fixing unit 250
And a stacker section 260. Exposure device 210 is a laser
It has a laser unit including 211 and a scanner including polygon mirror 212.

The developing unit 220 includes a photosensitive drum 221 and a cleaner 222.
And visualizes the latent image formed on the drum 221 by the reflection mirror 213.

The paper in the paper feed cassette 230 is sent by a paper feed roller 231 and a transport roller 232, and is temporarily stopped by a registration shutter 233. As a result, the laser irradiation and the rotation of the drum 221 are synchronized with the sheet feeding, and then the sheet is fed to the drum 221 by the feeding roller 234. Then, the transfer section 240 transfers the toner image to the sheet, and the fixing section 250 fixes the toner image.

The above-described series of operation timing controls such as paper conveyance, character formation, development, transfer, and fixing are controlled by an image memory described later.
This is performed via a laser printer controller 35, which will be described later, based on the data stored in.

 Returning to FIG. 1, the controller C will be described.

The controller C mainly includes a transmission system for transmitting data read from the image reading unit 110 to the partner station, a reception system for transmitting data received from the partner station to the laser printer 200, and an image memory for storing predetermined image data. 10 and a CPU 50 for controlling the entire controller C.

The transmission system includes a reader interface 21, an intermediate coder 22 that converts read data into an intermediate code, an image memory 10 that stores the intermediate code, and a pixel density conversion circuit that reduces the pixel density according to the function of the partner station. 60
And MH coder 24 or MR according to the function of the partner station.
It is composed of a selector 23 for selecting a coder 25, a modem 30 for modulating a transmission signal, and an NCU 31 for line control.

The receiving system is an NCU31 and a modem 3 that demodulates the received signal.
0, an MH intermediate decoder 41, an MR intermediate decoder 42, a multiplexer 43, an image memory 10 for storing an intermediate code via this multiplexer, a pixel density exchanging means 44 having a dot overlapping means, and a video from an intermediate coder. It is composed of a decoder 45 for converting into a signal and a laser printer controller 35 for controlling the laser printer 200.

The image memory management circuit 11 manages the entire remaining capacity of the image memory 10, writing, reading, and the like.

The CPU 50 controls the entire controller C. The control program is stored in the ROM 51, and each data necessary for executing the program is stored in the RAM 52.

The image memory 10 sends stored data in accordance with the transmission speed of the line 400 at the time of transmission, stores one page of data at the time of reception, and then sends the stored data to the decoder 44. When the image memory 10 is used as a retention memory, the information is stored until the multi-copy ends, and when the image memory 10 is used as a broadcast transmission memory, the broadcast transmission ends. Until that time, the information is stored. Reference numeral 300 is a telephone.

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

FIG. 5 is a flow chart showing the operation of the above embodiment.

First, turn on the start button and copy key (S1
0), it is determined from the value of the numeric keypad for inputting the number of copies whether or not multi-copying is performed (S20). When copying only one original, the CPU 50
The image reading unit 100 and the intermediate coder 22 are driven via the, the document is read and then converted into an intermediate code, and the address counter in the memory management circuit 11 is operated to operate the image memory.
The intermediate code is stored in 10 (S21). The intermediate code is converted into a video signal (image data) by the decoder 44 (S22), and the laser printer 200 is driven based on this video signal (S23). In the above case, the image memory 10 is used as a buffer for storing several lines.

In the case of multi-copy, the number of repeats n is stored in the RAM 52
(S31), and the data from the reading unit 100 is converted and stored in the image memory 10 as in S21. In the case of this storage, it is determined whether data of one page of the document has been stored in the image memory (S33). The one-page reading is determined by counting the signal (EOL) from the reader interface 21 generated every time a document is read for one page or by continuously generating EOL, or by the management circuit 11. . Then, similarly to S22, the intermediate code memory data is converted into a video signal by the decoder 44, the laser printer 200 is driven (S36), the number of repeats n is reduced by 1 (S35), and these operations are performed by n.
It repeats twice (S37).

On the other hand, if the copy key is off, it is determined whether the transmission key is pressed (S40), and if it is transmission, it is determined whether the broadcast transmission key is pressed. (S41).

In the case of broadcast transmission, the destination data input by the ten-key pad is stored in the RAM 52 (S51), and the reader unit 10 is pressed by pressing the input completion key of the destination data.
After the data from 0 is converted into the intermediate code, it is stored in the image memory 10 (S52). When the storage of one page of the manuscript is completed, the transmission set of the modem 30 and the NCU 31 is set for the first destination (S54), and the data read from the image memory 10 is transferred to the MH coder 24 or the MR coder.
Convert to code or MR code (S55) and send to line 400. These operations are executed for all destinations (S56). In this case, every time one page of the above manuscript is sent, the RAM
Clear the destination data stored in 52 one by one.

If there is only one destination, after the modem 30 and NCU 31 are set for transmission, the read data is stored in the image memory 10, the data is encoded by the coders 24, 25, and the line 400
Send to. When receiving (S61), the modem 3
0, the NCU 31 is set to receive (S62), the received data is converted into an intermediate code by the MH intermediate decoder 41 or the MR intermediate decoder 42, and the intermediate code is stored in the image memory 10 (S63). When the storage is complete (S64),
The intermediate code from the image memory 10 is converted into a video signal by the decoder 44 (S65), and based on this video signal,
The laser printer 200 is driven (S66).

The basic recording resolution of the laser printer 200 is 16p
It is set to els / mm x 15.4 lines / mm. Therefore, when receiving from a normal facsimile (for example, a facsimile having a specification of 8pels / mm × 7.7 lines / mm) (in the case of S61 to S65), the pixel density conversion circuit 44
Duplicate dots and output. That is, the received data is sent to the decoder 45 in duplicate for each dot a predetermined number of times (for example, once), and the data thus obtained is repeated a predetermined number of times for each line (for example, once or 2 times).
The times are transmitted to the decoder 45 in duplicate. By doing so, even when the laser printer 200 is used, the image size on the print paper is not reduced at the time of reception. The same applies to the case where another plain paper high-speed printer such as a thermal transfer printer is used. Further, without using the pixel density conversion circuit 44, the read operation of the image memory 10 may be controlled under the control of the CPU 50 via the image memory management circuit 11 in the same manner as described above. Good.

EFFECTS OF THE INVENTION According to the present invention, the intermediate code to be stored in the reception mode and the intermediate code to be stored in the copy mode are stored in the same storage means. Further, since the intermediate code to be stored in the reception mode and the intermediate code to be stored in the copy mode have the same form, it is possible to simplify the write / read control, and In the copy mode, since the storage means is used as a buffer for storing a predetermined number of lines, the memory capacity of the storage means necessary for the facsimile can be reduced in this sense as well.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a perspective view showing an example of an image reading unit. FIG. 3 is a diagram illustrating an example of an operation panel. FIG. 4 is a vertical sectional view showing an example of a laser printer. FIG. 5 is a flow chart showing the operation of the above embodiment. C ... Controller, 10 ... Image memory, 11 ... Image memory management circuit, 22 ... Intermediate coder, 30 ... Modem, 35 ...
… Laser printer controller, 44… Decoder, 50…
... CPU, 60, 61 ... Pixel density conversion circuit, 100 ... Image reading unit, 200 ... Laser printer.

Claims (1)

[Claims] 1. A facsimile having a copy mode and a transmission / reception mode; a reading means for reading an original image; image data obtained from the reading means is encoded into an intermediate code which can be encoded into an MH code or an MR code. 1
Encoding means; receiving means for receiving MH code or MR code image data; first decoding means for decoding the MH code or MR code received image data into the intermediate code; and the first encoding means. Storing means for temporarily storing the original image data of the intermediate code and the received image data of the intermediate code from the first decoding means, the storing means having a storage capacity of at least one page; and the intermediate stored in the storing means. Second decoding means for decoding the coded image data into raw image data; recording means for recording the raw image data obtained by the second decoding means in page units; one page in the copy mode The storage means is used as a buffer for temporarily storing a predetermined number of lines less than the above, and reading and recording are performed in parallel, while in the receiving mode, one page of intermediate code is used. Facsimile, characterized in that it comprises a; image data after the completion of storing in the storage means and a control means for starting the recording by said recording means.