JPS6198067A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To obtain a facsimile equipment which resends originals, one by one, and transmits originals securely by providing a page memory stored with all of image information of an original and writing and reading this page memory simultaneously. CONSTITUTION:Image information read by a scanner is shifted, line by line, to a serial/parallel conversion register 11 and converted from serial to parallel. When one-line data is inputted to the register 11, the register 11 sends a DMA transfer request signal to a DMA controller 13 and then a muCPU14 reads the storage line address of the page memory 2' out of a main memory 15 and sends out the DMA transfer request signal. The DMA controller 13 receives the signal and sends a DMA transfer confirmation to the serial/parallel conversion register 11 and muCPU14 to transfer one line of data to the storage line of the page memory 2' on DMA basis.

Description

TECHNICAL FIELD The present invention relates to a facsimile device, and more particularly to a facsimile device suitable for storing and reading image information and retransmitting stored image information.

In the conventional facsimile apparatus, since transmission uses a general FF single line, errors may occur due to noise on the single line, and complete image information may not be transmitted to the receiving side. In the G3 facsimile machine, in phase D after transmitting one-picture information, the receiving side sends the result of whether or not the picture information has been completely received to the transmitting side, so the transmitting side can confirm that the transmitted picture information is not completely received by the receiving side. You can find out whether it was sent to you or not. Therefore, in order to transmit image information without errors, it is necessary to retransmit the image information by some method when it is known that an error has occurred.

For this reason, conventionally ARQ (Automatic-ic
Some facsimile machines are equipped with a retransmission function such as "Repeat Request". However, ARQ (
The automatic retransmission request) function cannot be used unless both the sending and receiving sides have the same function, and has the drawback that retransmission cannot be performed regardless of the type of receiver.

In addition, conventional facsimile machines are equipped with an automatic document feeder (ADF) so that multiple originals can be automatically sent in one communication. Some machines are designed to feed paper one sheet at a time.

A document fed by the ADF is read by a scanner and stored in a line buffer capable of holding image information for several lines, and the stored lines are successively read, coded, and sent out. For this reason, the reading and transport time for a document differs depending on the document, and the encoding time of the conventional processing line,
Depending on the sending time, it is mechanically difficult to read a manuscript that has been read once again for retransmission.

FIG. 4 shows an example of a facsimile device equipped with an image information storage/reproduction device (SAF) so that facsimile transmission can be retransmitted multiple times. All the image information read by the scanner 1 is stored once in the 5AF6 by the image information control unit 5, and then the facsimile machine makes a call and sends the image information from the 5AF6 to the DCR 3 via the image information control unit 5. The data is encoded by the modem 4, modulated by the modem 4, and sent to the line.

With conventional methods like this, all of the stored image information can be retransmitted as many times as desired, but the drawback is that it takes longer than normal transmission from the start of reading the original to the end of transmission. .

Purpose An object of the present invention is to provide a facsimile device that can resend each document and reliably transmit the document regardless of the model of the receiving side, by eliminating such conventional drawbacks. There is a particular thing.

Structure In order to achieve the above object, the present invention provides a page memory capable of storing all the image information of a set original to be immediately transmitted, and enables storage and reading of the page memory at the same time.

The feature is that all accumulated image information is retained until a response is received from the other party so that retransmission is possible.

Hereinafter, the configuration of the present invention will be explained using examples.

FIG. 1 is a block diagram of a facsimile machine showing an embodiment of the present invention.

In FIG. 1, 1 is a scanner that reads a document and converts it into image information, 2 is a page memory device that holds image information, which is the main part of the present invention, and 3 is a DCR 14 that encodes image information and modulates the data. This is a modem that sends data to

The original (image information) read by the scanner 1 is sequentially stored in the page memory device 2, and only the stored data is read out and encoded by the DCR 3.

The coded image information is modulated by the modem 4 and sent out.

FIG. 2 is a detailed explanatory diagram of the page memory device @2 shown in FIG.

In Figure 2, 11 is a serial/parallel conversion register, 12 is a parallel/serial conversion register, and 13 is a D
MA controller, 14 is μCPU, 15 is main memory,
2' is a page memory.

Image information read by the scanner 1 is shifted line by line to a serial/parallel conversion register 11, where serial/parallel conversion is performed. When the serial/parallel conversion register 11 has one line of data, the serial/parallel conversion register 11 is transferred to the DMA controller 1.
3, a DMA transfer request (DMA REQ) signal is sent. Next, the μCPU 14 reads the storage line address of the page memory 2' from the main memory 15 and performs the DMA RE.
The Q signal is sent to the DMA controller 13. Upon receiving them, the DMA controller 13 performs a DMA transfer confirmation (
A DMA ACK) signal is sent to the serial/parallel conversion register 11 and μCPU 14, and one line of data is DMA transferred to the storage line of the page memory 2'. DM
The A controller 13 sequentially performs this operation and transfers the line data read by the scanner 1 to the storage line of the page memory 2' by DMA.

When transmitting image information, the parallel/serial conversion register 12 outputs a DMA REQ signal to the DMA controller 13. Next, the μCPU 14 is the main memory 15
The subsequent line address of the page memory 2' is read from the page memory 2', and a DMA REQ signal is output to the DMA controller I3. Upon receiving them, the DMA controller 13 sends the DM to the parallel/serial conversion register 12 and μCPU 14.
A Outputs the ACK signal and transfers the read line data corresponding to successive line addresses of the page memory 2' read by the μCPU 14 to the parallel/serial conversion register 12.
Perform DMA transfer for the line. Next, the data is subjected to parallel-to-serial conversion in the parallel-to-serial conversion register 12 and sent to the DCR 3. Line data is coded by the DCR 3, modulated by the modem 4, and sent out.

When reading page memory 2', μCPU, 14
advances the line address in sequence, and also controls so as not to read from unstored lines. Once the image information of the accumulated line is read out, the image information of all the accumulated lines is retained.6 If a response is received from the receiving side after sending the image information, if the image information is completely If the image information cannot be transmitted, the image information held in the page memory 2' is read out again from the first line without using the scanner 1, and sent to the DCR 3 to be transmitted to the other party, and retransmission is performed. If the image information has been completely transmitted, the next document is read and storage and reading are repeated from the first line. μCPU 1 that controls page memory 2'
4 exchanges data from the scanner 1, DCR 3, and a CCU (not shown) that receives a response from the other party;
It manages the data in the page memory 2'. FIG. 3 shows the data input/output state of the page memory 2' at this time.

FIG. 3(1) shows the page memory 2' before reading starts.

In FIG. 3(2), data is shifted to the serial/parallel conversion register 11 by one line.

The data is transferred by DMA by μCPU 14 and 1
This is the state in which the line is stored in the storage line of the page memory 2'. FIG. 3(3) shows a state in which transmission of image information has started and the first line stored in the page memory 2' has been read out. FIG. 3(4) shows a state in which image information is sequentially stored in the page memory 2' and read out. Figure 3 (5
) is the state in which the last line of image information has been stored. FIG. 3(6) shows a state in which reading of the last line of image information has been completed. FIG. 3 (7) shows a state in which all lines have been accumulated and held in the page memory 2', and the device is waiting for a response from the other party to see if the image information has been completely transmitted. FIG. 3(8) shows the state when a simple document is sent out in a short time. FIG. 3 (9) shows the state when a complicated document takes a long time to be sent.

Normally, the line reading time for a facsimile machine is
Although it is constant regardless of the document, the code data after data compression differs depending on the complexity of the line, so the data sending time differs. However, in this embodiment, since the read original is stored in the page memory 2', reading can always be completed in a fixed time regardless of the original.

In this way, according to the present embodiment, it is possible to always read a document at a constant speed, and unlike conventional facsimile machines, the document transport does not move or stop, making it difficult for deviations in reading to occur. Additionally, it becomes possible to resend each document regardless of the model of the receiving side.

Effects As explained above, according to the present invention, it becomes possible to resend each document regardless of the model of the receiving side, and it becomes possible to reliably transmit the document.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a facsimile machine showing an embodiment of the present invention, FIG. 2 is a detailed explanatory diagram of the page memory device of FIG. 1, and FIG. 3 is a page memory device that holds data information in the page memory. 3: DCR. 4: Modem, 11 digital real/parallel conversion register,
12: Parallel/serial conversion register, 13: D
MA controller 1 Herola, 14: μCPU, 5: Main memory,
2' Two page memory. Patent applicant Ricoh Co., Ltd. - Representative patent attorney Masatoshi Isomura -;'. Figure 1 Figure 2 Figure 3 t4) (51 (6) (71F8
) (9) Ward 4

Claims (3)

[Claims] (1) A scanner that reads a document and converts it into image information; a data compression device that encodes the image information read by the scanner;
In a facsimile machine having a modem or the like that modulates and demodulates the image information encoded by the data compression device, all the image information for one document read by the scanner is stored, and the stored image information of any line is retrieved. A facsimile device further comprising a page memory for storing and reading out image information at any time. (2) The image information stored in the page memory is retained after the message is sent until a post message response is sent from the receiving side, and if the message transmission fails, the stored image information is retained. The facsimile machine according to claim 1, wherein the facsimile machine retransmits the facsimile. (3) The page memory is used as a buffer for encoding image information, and the reading accumulation time is always constant regardless of the encoding processing time and sending time, which differ depending on the line. A facsimile machine according to scope 1 or 2.