KR970003410B1 - Image memory apparatus and transmission/reception method of a facsimile - Google Patents

Abstract

An image memory apparatus of the facsimile and a transmission / reception method using the said apparatus where uses the image memory that is divided to the 4 banks. The said apparatus consist of a image data compression/restoration means, a image memory means having several data banks where stores the transmission/reception image data, a main control means where controls the entire action of the facsimile system according to the compression signal, and a network switching means where switches the digital data line and telephone line.

Description

Facsimile image memory device and transmission / reception method using the device

1 is a configuration diagram of a conventional facsimile image memory device.

2 is a configuration diagram of a facsimile image memory device of the present invention.

FIG. 3 is a signal flow diagram of the transmission method using the image memory device of FIG. 2, (a) is a signal flow diagram for A3 paper transmission and reception, and (b) is a signal flow diagram for A4 paper transmission and reception.

* Explanation of symbols for the main parts of the drawings

100: subject control 101: manuscript reading unit

102: image data compression / restore

104: image memory section

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile image memory device, and more particularly, to a facsimile image memory device which is intended to read, transmit, and receive an original at a high speed by dividing the image memory divided into four banks.

Conventional facsimile image memory device, as shown in Figure 1 of the accompanying drawings, the main control unit 1 for the overall control of the facsimile, the original reading unit (2) for reading the original, and the control of the main control unit (1) A read control section 3 for controlling the document reading section 2 and processing image data, a system memory section 4 for temporarily storing system parameters and temporarily storing image data in units of bytes; A recording device control section 5 for controlling the recording device to record the received data, an image data compression / restore section 6 for compressing the image data and conversely restoring the compressed image data to the original data; The extruded data memory unit 7 temporarily storing the image data compressed by the image data compression / restore unit 6, and digital image data are modulated into analog signals suitable for a general telephone network. Conversely, a modulation / demodulation unit 8 for demodulating analog signals transmitted from a general telephone network into original digital image data, and a network control unit 9 for controlling a general telephone network connection are included.

The operation of the conventional facsimile image memory device configured as described above will be described in detail.

First, when the original is to be transmitted, the original reading unit 2 reads the original to be transmitted in units of one line according to the control of the main control unit 1, and inputs the read image data to the reading control unit 3.

The read control unit 3 corrects the input image data and temporarily stores the image data in the system memory unit 4 in line units.

The image data compression / restoration section 6 extracts the image data temporarily stored in the system memory section 4, compresses them to a predetermined level (MR, MH, MMR) and temporarily stores them in the compressed memory section 7. .

The compressed image data temporarily stored in the compressed memory unit 7 is modulated into an analog transmission signal by the modulator / demodulator 8 and transmitted to the general telephone network PSTN through the network controller 9 to be transmitted to the other party.

On the other hand, at the time of reception, the analog signal received through the PSTN is input to the modulator / demodulator 8 through the network controller 9, and the modulator / demodulator 8 The input analog signal is demodulated to the original image data and temporarily stored in the compressed data memory section 7.

The received image data temporarily stored in the compressed data memory section 7 is expanded in the image data compression / recovery section 6 and restored to the original image data to be temporarily stored in the image data memory in the system memory section 4. do.

Received image data temporarily stored in the image data memory in the system memory section 4 is recorded through the recording device control section 5 to thereby transmit and receive image data.

However, such a conventional facsimile image memory device has a limited image memory area in the system memory unit, which is suitable for a recording device performing a line-by-line recording function, a low speed read device, and a low speed transmission device. The transmission apparatus has a problem that it is difficult to cope with the limitation of the image memory area.

It is therefore an object of the present invention to provide a facsimile image memory device for reading, transmitting, and receiving an original at high speed by dividing the image memory divided into four banks.

Means for achieving the object of the present invention is an image data compression / restore means for compressing the image data read from the original reading means, and restores the received image data to the original image data, and the image data from the original reading means A first compression start line which is activated when a compression function is generated by the compression / recovery means, and a plurality of data banks which temporarily store the transmission image data read by the original reading means and temporarily store the received image data and the compressed / restored image data. An image memory means, a network switching means for switching a digital line and a telephone network under the control of the main control means, and a second compressor moving line which is activated when a DMA function is generated from the image data compression / restore means to the main control means. In the following, the present invention If it described in detail based on the rich drawings as follows.

2 is a configuration diagram of the facsimile image memory device of the present invention. As shown in FIG. 2, the main control unit 100 controls the facsimile overall control, the document reading unit 101 for reading the document, and the transmission image data. An image data compression / recovery unit 102 for restoring the compressed image data received back to the original data, and a compressed data memory unit 103 for temporarily storing the image data compressed by the image data compression / restore unit 102. An image memory unit 104 comprising a plurality of data banks for temporarily storing transmission image data read by the document reading unit 101 and temporarily storing received image data and compressed / restored image data, and recording A recording device control section 105 for controlling the device 106 to record the received data, the digital line connection section 107 under the control of the main control section 100, and A network switch unit 109 for switching the network connection unit 108 to transmit and receive image data, and a first compressor copper wire which is activated when a DMA function is generated from the document reader unit 101 to the image data compression / restore unit 102 ( 110) and a second compressor moving line (111) which starts when a DMA function is generated from the image data compression / recovery unit (102) to the main control unit (100).

The operation and effects of the image memory device of the present invention configured as described above will be described in detail with reference to FIGS. 3 and 4.

First, when the A3 original is transmitted, the original reading unit 101 reads one original and inputs the read image data into the image data compression / restore unit 101 to start the first compressor moving line 110.

The image data compression / restore unit 102 compresses the input transmission image data to a predetermined level, and is activated by the first compressor moving line 110 which is activated in accordance with the generation of the compression function output from the document reading unit 101. The compressed image data is input to the first and second data banks 104a and 104b in the image memory section 104.

Thereafter, when the second original is transmitted, as described above, after reading the second original from the original reading unit 101, the first compressor moving line 110 is started, and the read transmission image data is transferred to the image data compression / restore unit 102. Enter it.

The image data compression / restore unit 102 compresses the input transmission image data to a predetermined level, and is activated by the first compressor moving line 110 which is activated in accordance with the generation of the compression function output from the document reading unit 101. The compressed image data is input to the first and second data banks 104a and 104b in the image memory section 104.

Thereafter, when the second original is transmitted, as described above, after reading the second original from the original reading unit 101, the first compressor moving line 110 is started, and the read transmission image data is transferred to the image data compression / restore unit 102. Enter it.

The image data compression / restore unit 102 compresses the input transmission image data to a predetermined level and is activated by the first compression start line 110 which is activated in accordance with the generation of the compression function output from the document reading unit 101. Then, the compressed image data is input into the third and fourth data banks 104c and 104d in the image memory section 104.

When the second original (image data) is stored in the third and fourth data banks 104c and 104d in the image memory unit 104 as described above, the main compressor unit 100 is started by starting the second compressor wire 111. It informs that the compression function has occurred.

Accordingly, the main control unit 100 controls the network switching unit 109 to control the transmission mode. Accordingly, the first image data stored in the first and second data banks A and B in the memory unit 104 is controlled. The image data compression / restore unit 102 compresses and temporarily stores the image data in the compressed data memory unit 103, and then transmits the data through the switched network unit 109 under the control of the main control unit 100.

In addition, when the third original is read by the original reading unit 101, the read image data is input to the image data compression / restoring unit 101 in the same manner as the first original reading operation, and the first compressor moving line 110 is activated. Let's do it.

The image data compression / recovery unit 102 compresses the input transmission image data to a predetermined level and is activated by the first compressor moving line 110 which is activated in accordance with the generation of the compression function output from the document reading unit 101. The compressed image data is input to the first and second data banks 104a and 104b in the image memory section 104.

When the image data to be transmitted is stored in the first and second data banks 104a and 104b in the image memory unit 104 as described above, the image data compression / restore unit 102 stores the second compressor copper wire 102. ) To notify the main control unit 100 that the compression function has occurred.

When the compression function is applied through the second compressor moving line 111 as described above, the main control unit 100 controls the network switching unit 109 and transmits the image data, thereby compressing and restoring the image data. The unit 102 extracts the image data stored in the third and fourth data banks C and D in the image memory unit 104 and compresses the image data to a predetermined level.

When the image data to be transmitted at a predetermined level is compressed in this manner, the compressed image data is temporarily stored in the compressed data memory 103, and the transmission image data temporarily stored in the compressed data memory 103 is described above. Under the control of the main control unit 100, the network switching unit 109 modulates and transmits the transmitted analog signal.

In addition, when the fourth original is to be transmitted, the above operation is repeated to transmit the transmission image data.

On the other hand, when transmitting and receiving an A4 document, image data is transmitted / received by the operation as shown in FIG. 3 (b).

First, after reading one document to be transmitted from the document reading unit 101, the first compressor moving line 110 is started.

In addition, the read image data is stored in the first data bank A in the image memory unit 104.

At this time, in accordance with the activation of the first compressor wire 110, the image data compression / restoration unit 102 is activated to convert the compressed data received through the network switching unit 109 and the compression data memory unit 103 sequentially. After restoring to a third data bank (C) in the image memory unit 104, and then restores and stores the received image data by starting the second compressor wire (111) in the main control unit 100 You will be informed.

Thereafter, when the second original is read, the first compressor wire 110 is started, and the read image data is stored in the second data bank B in the image memory unit 104 described above.

As the first compressor moving line 110 is activated, the image data compression / recovery unit 102 extracts the first image data stored in the data bank A, compresses the first image data to a predetermined level, and then compresses the compressed data memory unit 103. Temporarily store in.

Thereafter, the second compressor wire 111 is started to notify the main control unit 100 of the read storage of the second image data. Accordingly, the main control unit 100 controls the network switching unit 109 to control the compressed data memory unit 103. ) Will transmit the transmission image data stored in.

Thereafter, when the second reception data is received from the reception side through the network switching unit 109 to the compressed data memory unit 103, the main control unit 100 controls the image data compression / restore unit 102 to process the reception data. .

Under the control of the main control unit 100, the image data compression / restore unit 102 compresses the received data stored in the compressed data memory unit 103 to restore the original image data, and restores the received image. The data is stored in the fourth data bank D in the image memory section 104.

Thereafter, the second compressor moving line 111 is started to notify the main control unit 100 of the restoration and storage of the received data. Accordingly, the main control unit 100 controls the recording apparatus control unit 105 to record.

Under the control of the main controller 100, the recording device controller 105 receives the received image data stored in the third data bank C in the image memory unit 104 and transmits the received image data to the recording device 106. The data is recorded.

In the third original transmission, after reading the third original, the read image data is stored in the first data bank A in the image memory unit 104, and the first compressor wire 110 is started.

In response to the start of the first compressor wire 110, the image data compression / recovery unit 102 extracts the transmission image data stored in the second data bank B in the image memory unit 104 and compresses the image data to an arbitrary level. In addition, the compressed transmission image data is stored in the compressed data memory unit 103, and the second compressor moving line 111 is activated to inform the main control unit 100 of the compression and storage of the transmission image data.

Then, when the third received data is received and stored in the compressed data memory unit 103, the main control unit 100 controls the image data compression / restore unit 102 to restore the received data stored in the compressed data memory unit 103. The image data compression / restore section 102 restores the received data to the original image data so that the third data bank C in the image memory section 104 can be restored. ), And informs the main control unit 100 of this.

Accordingly, the main control unit 100 controls the recording device controller 105, and according to the control, the recording device controller 105 receives the received image data stored in the fourth data bank D in the image memory unit 104. The second received data is recorded by taking it out and transferring it to the recording device 106.

Thereafter, the above operation is repeated according to the transmission and reception of the original to perform transmission and reception of image data.

As described in detail above, the present invention can effectively store image data according to transmission and reception by constructing the data bank of the image memory in multiple stages, so that high-speed reading and writing can be performed.

Claims (7)

Image data compression / restoration means for compressing the read image data in accordance with the compression function signal generated from the original reading means, restoring the received image data to the original image data, and generating a compression function signal; and the image data compression. Image memory means comprising a plurality of data banks for storing transmission and reception image data obtained from the data recovery / recovery means, main control means for controlling the operation of the facsimile system according to the compression function signal generated from the image data compression / recovery means; And a network switching means for switching a digital line and a telephone network during image data transmission and reception under the control of the main control means. 2. A facsimile image memory device as recited in claim 1, wherein said image memory means comprises four data banks. 3. A facsimile image memory device according to claim 1 or 2, wherein the image memory means alternately stores one document by binding two data banks during A3 paper document transmission. The method according to claim 1 or 2, wherein the image memory means supports A4 and divides the data banks into two when transmitting and receiving, one of the divided data banks is used for storing transmission data, and the other is used for storing received data. Facsimile's image memory device, characterized by utilizing as a. Transmitter storage process that selectively stores the transmission originals read in the original transmission in the data bank in the image memory according to the size of the facsimile transmission original, and resends the original transmission which recompresses and stores the stored transmission originals in the compressed data memory. And a receiving original storing step of selectively storing received originals in a data bank in the image memory according to the size of the received originals when receiving the originals. 6. The method of claim 5, wherein in the case of A3 original transmission, two data banks in the image memory are alternately stored and stored alternately for each read transmission original. 6. A fax according to claim 5, wherein in the case of A4 original transmission, the data bank in the image memory is divided into two, one of the divided data banks storing the transmission original, and the other storing the receiving original. Transmission and reception method using an image memory device.