JPS63180268A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To simplify a circuit and to economize the titled equipment by providing a device changing a coding system on plural communication controllers in common, switching image information signal conversion at every scanning line, and thus processing by time division. CONSTITUTION:A transmission original is scanned by a scanner part 3, resulting image signals are inputted to an encoder 4 where they are compress-coded, and stored in a RAM 2. Thereafter the data is stored in a disk device 5, and transmitted via the communication control parts 121, 122 when the coding system is the same with that of the opposit terminal equipment. On the other hand, when the coding systems are different from each other, the data is transferred to a specified areas of the RAM 2 from the device 5 at every transmission image information of the control parts 121, 122 and data by one scanning line is alternately read out, elongated in a decoder 8, and outputted to an encoder 9 and a line memory 101 or 102. The encoder 9 selects the memories 101, 102 alternately by a selector 11 and while referring to the outputs of them, an image information from the decoder 8 is compressed. As a result, a need for providing an encoder/decoder at every communication port is eliminated, and the facsimile equipment is economized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile device for image transmission. In particular, the present invention relates to a facsimile apparatus with storage/broadcasting means having a large capacity storage device for storing image information and a plurality of communication line ports.

〔overview〕

The present invention provides a facsimile device for image communication, in which a plurality of line memories and a selector for selectively selecting the output thereof are provided between a pair of encoders and decoders, and image information to be code-converted is switched for each scanning line. By adopting a configuration in which time-division processing is performed, a pair of codecs is not required for each communication port line, resulting in an economical device.

[Conventional technology]

FIG. 2 is a block diagram of a conventional facsimile machine. In FIG. 2, an encoder 4 is connected to the scanner section 3 and compresses the amount of image information stored in the disk device 5. The codec (CODEC) 21.22 is
Data compressed using the encoding method of this device is input from the disk device 5, decompressed, compressed using the encoding method of the other terminal, and sent to the communication control unit 12. The compressed data is sent to the communication control unit 1.
2, decompresses it, compresses it using the encoding method of this device, and provides it to the disk device 5.

Conventionally, when a facsimile machine scans and reads a document, the characteristics of the other party's terminal are not known. The information was compressed and stored in the disk device 5.

On the other hand, there are terminals with various different systems as communication partner terminals, and there are some that cannot transmit or receive data using the encoding system stored in the disk device 5. In such a case, at the time of transmission and reception, code conversion must be performed to match the encoding system of the other party's terminal. For this reason, the communication control unit 12.
, 12g and the disk device 5, two codecs 21 are provided.
．． 22 were installed facing each other, and code conversion was performed here.

[Problem that the invention seeks to solve]

However, in such conventional facsimile machines, since a pair of codecs are installed for each communication boat line,
The disadvantage is that each communication port is expensive and it is difficult to have a large number of ports due to economic constraints.

The present invention solves the above-mentioned drawbacks, and aims to provide an economical facsimile machine that does not require a pair of codecs for each communication boat line.

[Means for solving problems]

The present invention provides a storage device that stores image information compressed using a predetermined encoding method, a plurality of communication control devices that transmit the image information to a partner terminal, and a connection between the storage device and the communication control device. a decoder connected to the bus and decompressing image information stored in the storage device or compressed image information arriving at the communication control device; and an output of the decoder. a plurality of line memories that sequentially store the data for each scanning line; a selector that selects and outputs the outputs of the plurality of line memories; and a selector that is connected to the bus and uses the output of the selector as a reference line to output the output of the decoder. The present invention is characterized by comprising an encoder that performs compression using the encoding method of the partner terminal or the predetermined encoding method.

[Effect]

The storage device stores image information compressed using a predetermined encoding method (for example, method A).

If the sending or receiving partner terminal uses this method (method A), the storage device and the communication control device are connected via the bus. The other party's terminal uses a method different from this method (for example, method B)
When transmitting and receiving compressed image information, a decoder, a line memory, and an encoder are inserted and connected between the communication control device and the storage device via a bus. In the case of transmission, the image information (method A) stored in the storage device is once returned to the original information, and then converted to the method of the destination terminal (method B) and provided to the communication control device. In the case of reception, the method of the incoming partner terminal (method B) is once returned to the original information, and this is converted into a predetermined method (method A) and stored in the storage device.

Therefore, a device for conversion can be commonly provided in each communication control device, and can be used in a time-sharing manner to achieve economy.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram of a facsimile machine according to an embodiment of the present invention. In FIG. 1, the facsimile device includes a common bus 100, a central processing unit 1 connected to the common bus 100 that controls the entire device, and a RAM (RAM) connected to the common bus 100 that temporarily stores compressed data. 2, a scanner section 3 that scans a document, an encoder 4 that is connected to the common bus 100 and compresses the output of the scanner section 3 using the encoding method of this device and outputs it to the common bus 100; a disk device 5 that is connected to the common bus 100 and stores data compressed using the encoding method of this device; a decoder 6 that is connected to the common bus 100 and decompresses the data stored in the disk device 5; and a printer 7 for printing out the output.

In addition, the facsimile device is connected to the common bus 100, and when the encoding method of the other party's terminal is different, the facsimile device transmits compressed data from the disk device 5 or compressed received data via the RAM 2 in one scanning line. A decoder 8 that inputs and decompresses the input every minute, a line memory IL 1102 that sequentially stores one scanning line of data output from the decoder 8, and a line memory 10. , a selector 11 that selects and outputs data stored in the Log, and a common bus 100, and uses the output of the selector 11 as a reference line and compresses the output of the decoder 8 using the encoding method owned by the other terminal. An encoder 9 that outputs the data to the bus 100 or compresses it using the encoding method of this device and stores it in the disk device 5 via the common bus 100.
Equipped with.

Furthermore, if the facsimile device is connected to the common bus 100 and the encoding method of the other terminal is the same as that of this device, the facsimile device inputs compressed data from the disk device 5 via the common bus 100. The compressed data is received and given to the disk device 5 via the common bus 100, and if the encoding method of the other terminal is different, the compressed data is sent from the encoder 9 to the common bus 100. A communication control unit 12 that inputs the data via the bus 100 and transmits it to the other terminal, receives compressed data, and provides it to the RAM 2 via the common bus 100. ．． 12□.

The operation of the facsimile machine having such a configuration will be explained. In FIG. 1, a transmission document is scanned by a scanner section 3, and the read image signal is input to an encoder 4. The encoder 4 compresses and encodes the image signal from the scanner section 3 and sends it to the common bus lOO. The compressed data sent to the common bus 100 is stored in the RAM 2 under the control of the central processing unit 1.

This data is further transferred from the RAM 2 to the disk device 5. After the image information of the transmission document is stored in the disk device 5 for each document, it is sent to the communication control section 12. and is transmitted via the communication control unit 12t.

However, at the time of transmission, the encoding method of the other terminal and the encoding method of the compressed data stored in the disk device 5 (
In other words, if the encoding method of the encoder 4 is different, the compressed data of the disk device 5 cannot be transmitted as is, and it becomes necessary to decode it once and then encode it using the encoding method of the other party's terminal. Furthermore, since communication by the communication control unit 12+ and communication by the communication control unit 12□ are performed independently, two different pieces of image information may be transmitted at the same time. The operation in this case will be explained below.

Communication control unit 12. The image information X transmitted is successively output from the disk device 5 in predetermined amounts in accordance with the progress of the transmission and transferred to a predetermined area X of the ram 2.

The image information Y transmitted by the communication control unit 12□ is similarly transferred to another predetermined area y within the RAM 2.

The image information X is read by the decoder 8 from the area X of the RAM 2 for one scanning line (from one line synchronization code to the next line synchronization code). The decoder 8 expands the data for one scanning line and outputs the original image signal for the one scanning line to the line memory 10+ and the encoder 9. The encoder 9 sets the selector 11 to pass the output of the line memory 1 month O1, and compresses the image signal from the decoder 8 while referring to the image signal from the line memory 11 as a reference line. At the same time, the output image signal of the decoder 8 is written into the line memory 10+. The compressed image information is sent from the encoder 9 to the communication control section 12. is written to the buffer memory within.

When the encoding conversion of the data for one scanning line of the image information X is completed in this way, the decoder 8 then reads out the data for the image information Y for one scanning line from the area y of the RAM 2 and decompresses it. The encoder 9 connects the selector 11 to the line memory 10. The image signal from the decoder 8 is compressed using the image signal from the line memory 10□ as a reference line. At the same time, the output image signal of the decoder 8 is sent to the line memory 10.
．． written to. The compressed image information is written from the encoder 9 to a buffer memory in the communication control section 122. below,
Similarly, image information X and image information Y are stored in line memory 1.
01 and the line memory 10□, the data is encoded and converted alternately one scanning line at a time, and transferred to the communication control unit 121 and the communication control unit 12□, respectively.

The communication control unit 12+ and the communication control unit 12g transmit the respective image information written in the buffer according to the communication control procedure.

Further, if the encoding method of the image information transmitted from the terminal is the same as that of this device, the image information is stored in the disk device 5 as is. If the encoding method is different from the encoding method of this device, the RAM 2, decoder 8, line memory 10, selector 11, and encoder 9 encode it using the encoding method of this device and output it to the disk W5.
is stored in

In the above embodiment, the case where there are two communication control units 12 has been described, but even if there are three or more communication ports, the same can be realized by increasing the number of line memories 10.

〔Effect of the invention〕

As explained above, the present invention provides a plurality of line memories and a selector for selectively selecting the output between a pair of decoders and encoders, and switches image information to be code-converted for each scanning line. By performing time-division processing, the pair of codecs provided for each communication boat is no longer required, which has the excellent effect of realizing an economical device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a facsimile machine according to an embodiment of the present invention. FIG. 2 is a block diagram of a conventional facsimile machine. DESCRIPTION OF SYMBOLS 1...Central processing unit, 2...RAM, 3...Scanner unit, 4.9...Encoder, 5...Disk device, 6.
8...Decoder, 7...Printer, 10. ．． 10□・
... Line memory, 11... Selector, 12. ,1
2□...Communication control unit, 213.212, 22+ -
22g... codec, 100... common bus. Daiseyu 11 Iris 1st night Iris 2nd

Claims (1)

[Claims] (1) A storage device (5) that stores image information compressed using a predetermined encoding method, and a plurality of communication control devices (12) that transmits image information to a partner terminal.
), and a bus (100) to which the storage device and the communication control device are connected, compressed image information connected to the bus and stored in the storage device, or the communication control device a decoder (8) that decompresses the compressed image information that arrives at the decoder, a plurality of line memories (10) that sequentially stores the output of this decoder for each scanning line, and selects the output of the plurality of line memories. a selector (11) that is connected to the bus and uses the output of the selector as a reference line to compress the output of the decoder using the encoding method possessed by the partner terminal or the predetermined encoding method. A facsimile device comprising: (9).