JPS63222572A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To display the accurate receivable number of sheets even when trans mission condition differ by recognizing the remaining capacity of a memory on the receiver side at all time, and displaying the receivable number of sheets in a transmitter/receiver corresponding to the transmission condition. CONSTITUTION:A control circuit 38 always recognizes the remaining capacity of the memory 22 available for reception on the receiver side, divides the stan dard information quantity in the case of coding with the information size, the coding system, and the line density used in the current transmission into the said remaining capacity of the memory 22, and thus obtains the receivable number of sheets. The circuit 38, further, informs the receiver of the remaining receivable number of sheets by means of a message confirmation signal and a reception ready confirmation signal at every time when the transmission of one page ends, and displays the resulting number in the transmission available number of sheet display circuit 30 of both transmitter and receiver. As a result, an operator can accurately recognize the remaining available number of transmittable sheets.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a facsimile device.

[Prior Art] A conventional facsimile device is capable of proxy reception by storing received image information in a memory or the like when the recording paper runs out. When performing this proxy reception, by dividing the remaining receivable memory capacity by the standard capacity of one page,
The remaining number of receivable sheets is determined, and this receivable number is also notified to the transmitter, and both the transmitter and the receiver display the remaining number of receivable sheets. Then, each time the transmission of one page is completed, the displayed number of remaining receivable sheets is subtracted by one and the resulting number is displayed.

[Problems to be Solved by the Invention] When performing proxy reception and calculating the number of remaining receivable sheets during transmission operation, as in the conventional device described above, the remaining usable memory capacity for reception is determined by the capacity of one standard page. If the number of remaining receivable sheets is calculated by dividing, there is a problem that the remaining receivable number cannot be accurately displayed when the transmitted information size, transmission mode, encoding method, etc. are different.

[Means for solving the problem 1] The present invention always recognizes the remaining amount of memory on the receiving side,
The number of remaining receivable sheets is displayed on the transmitter/receiver according to transmission conditions such as the size of the information to be transmitted, the transmission mode, and the encoding method.

[Operation] The present invention always recognizes the remaining amount of memory on the receiver side, and displays the remaining number of receivable frames on the transmitter/receiver according to the transmission conditions such as the size of the information to be transmitted, the transmission mode, the encoding method, etc. This makes it possible to accurately display the remaining receivable number of sheets even if the transmitted information size, transmission mode, encoding method, etc. are different.

[Example] FIG. 1 is a block diagram showing one embodiment of the present invention.

The NCU (network control unit) 2 is a control unit that connects to the terminal of the telephone line 2a, controls the connection of the telephone exchange network, switches to the data communication path, and maintains the loop. In a normal state, the telephone port &12a is connected to the telephone 4 side.

The hybrid circuit 6 is a circuit that separates a transmission system signal and a reception system signal. The modulator 8 is a known CCITT
This circuit performs modulation based on Recommendation V21. The reading circuit 10 is a circuit that sequentially reads both signals for one line in the main scanning direction of the transmitted original and creates a signal train representing binary values of black and white. It is made up of. The encoding circuit 1z is a circuit that encodes binary data, and for this encoding,
There are MW (Modified Huffman) encoding and MR (Modified Read) encoding. The modulator 14 is a well-known (7) CCITT recommendation V27ter (differential phase modulation),
This is a circuit that performs modulation based on V29 (orthogonal variation!!).

In addition, an adder circuit 16 and a known CCITT recommendation V2
1, and a demodulator 18 that performs demodulation based on CCI
A demodulator 20 that performs demodulation based on TT recommendation V27ter (differential phase modulation) V29 (quadrature modulation), a memory circuit 22 that stores demodulated data, a demodulation circuit 24,
A recording circuit 26 is provided.

For input/output in the memory circuit 22, the location of the memory space is specified according to the address pointer from the control circuit 38. The decoding circuit 24 is a circuit that decodes demodulated data from the demodulator 20 or data from the memory circuit 22, and the signal sent from the control circuit 38 to the demodulating circuit 24 is r
If the signal is rlJ, the signal from the demodulator 20 is decoded, and if the signal is rlJ, the data from the memory circuit 22 is decoded. This decoding is MH (Modified Huffman) decoding or MR (Modified Read)
This is decoupling.

The recording circuit 26 is a circuit that sequentially records the decoded data line by line, and on the back side of the recording paper,
A black band is provided as a near end mark, and the near end mark length (length of the black band) is, for example, 50 cm. The recording circuit 26 outputs a signal of "1" when a near-end mark is detected, and outputs a signal of rOJ when a near-end mark is not detected.

Furthermore, a lamp 28 that displays the state of the recording paper cloth, a circuit 3o that displays the number of remaining sheets that can be transmitted, and a write pointer that records the address of the pointer used when writing demodulated data from the demodulator 20 to the memory circuit 22. An address storage circuit 32 is provided.

The write pointer address storage circuit 32 is connected to the control circuit 38
When a write pulse/read pulse is received from a write pointer, a write pointer address is written/read. The read pointer address storage circuit 34 is a circuit that stores the address of a read pointer used when outputting the data stored in the memory circuit 22, and when it receives a write pulse/read pulse from the control circuit 38, it It writes/reads pointer addresses.

The memory control flag 36 is a flag that is set when the write pointer returns from the last address of the memory circuit 22 to the first address, and is reset when the read pointer returns from the last address of the memory circuit 22 to the first address. be. Note that when receiving an inversion pulse from the control circuit 38, the memory control flag 36 inverts the contents of the flag.

Further, the control circuit 38 is an example of means for constantly recognizing the remaining memory capacity on the receiver side and displaying the remaining receivable number of sheets on the transmitter/receiver according to transmission conditions. Note that the above-mentioned transmission conditions are the size of the information being transmitted, the encoding method, and the linear density.

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

The facsimile receiver in the above embodiment records on recording paper until it detects the near-end mark,
When a near-end mark is detected at the start of receiving one page, it is stored in the memory circuit 22. If a near-end mark is detected while receiving one page, recording is performed on the recording paper until the end of that page.

In a facsimile receiver, the memory capacity is, for example, 10 Mbytes, the size of the transmitted document is A4 or B5, the encoding method is MH encoding or MR encoding, and the linear density is standard mode (sub-scanning Consider a fine mode (line density in the sub-scanning direction of 7.7 JL/m+*). The linear density in the main scanning direction is 85L/■-.

When the original size to be transmitted is A4, the MH encoding method is used, and the standard mode is used, the amount of information when encoded in a standard manner is, for example, 0.2 Mbytes.

When the original size to be transmitted is A4, the MH encoding method is used, and the fine mode is used, the amount of standard encoded information is, for example, 0.4 Mbytes.

FIG. 4 shows an example of the standard encoded transmission information amount based on other combinations of document size, encoding method, and mode.

The facsimile receiver in the above embodiment always recognizes the remaining receivable capacity and uses the standard information size when currently being transmitted, encoding method, and linear density (standard mode, fine mode, etc.) when encoding. Divide the remaining receivable capacity by the amount of information to find the number of receivable sheets. And 1
Each time the transmission of a page is completed, the transmitter is notified of the remaining receivable number of pages by MCF (message confirmation signal) and CFR (reception preparation confirmation signal). By displaying this number on the display of both the transmitter and the receiver, the operator can accurately recognize the number of remaining transmission cycles.

FIG. 2 is a flowchart showing the operation of the control circuit 38 in the facsimile receiver in the above embodiment.

First, the control circuit 38 sends a "0" level signal to the NCU 2 to turn off the CML, and if transmission is selected (S42.544), the control circuit 38 sends the rlJ signal to the NCU 2. and turns on CML (S46), performs the pre-procedure (S48), and determines whether the receiver has the same function as the present invention (350). If it does not have the same function, normal image transmission is performed. Execute (S52).

If the receiver has the same function, perform the previous steps (
354), if the CFR has an FIF (facsimile information field), the remaining number of usable sheets for transmission is displayed on the display circuit 30 (556.558).

If there is no PIF in the CFH, image transmission is performed and post-procedures are performed (S60.562).

Then, if the MCF has a PIF (S64), the remaining number of transferable sheets is displayed on the display circuit 30 (366), and the above operations (542 to 566) are performed (56B).

FIG. 3 is a flowchart showing the operation of the control circuit 38 in the facsimile receiver in the above embodiment.

The control circuit 38 sends the signal level rOJ to the NCU 2, turns off the CML, and if reception is selected (S7
2.574), the control circuit 38 sends rl to the NCU2.
Send the signal, turn on CML, and perform the pre-procedure (37
6,378), if the transmitter does not have the same function as the present invention, perform normal transmission ($80.$82).

If the transmitters have the same functions, perform the previous procedure (3).
84), calculates the remaining receivable number of sheets (S86), and displays the remaining transmittable number on the display circuit 30 (S88). Divide the amount to find the number of remaining receivable sheets. As the transmission mode conditions, consider the document size (A4, B4), the encoding method (MH, MR), and the sub-scanning mode (standard, fine).

When determining the remaining reception memory capacity, it is determined based on the write pointer address, read pointer address, and memory control flag 36. Then perform the previous steps,
Set the remaining transmission 1TTffR number in the CFH PIF (S90), perform image transmission, and perform post-procedures (S92).
．． 394-), calculate the remaining number of receivable sheets in the same way as 386 (596), and display the remaining number of transmittable sheets.
B), as in S90, set the remaining number of sheets that can be transmitted in the PIF. Return to On the other hand, it is not the last page like when receiving MPS (multi-page signal), etc.
If there is no mode change, the process returns to S92. In addition, E.O.
M (message end signal) etc. is received and if the page is not the last page and there is a mode change, the process returns to S84.

In addition, in the previous step, the facsimile transmitter receives information about the remaining receivable capacity from the facsimile receiver, and transmits the remaining receivable number of sheets by facsimile based on the information size, encoding method, linear density, etc. currently being transmitted. The machine may calculate this number and display the remaining number of receivable sheets.

Furthermore, when receiving multiple pages, for example, the information amount of the encoded data received on the first page is counted, and the remaining transmittable capacity is divided by the information amount of the encoded data received on the first page. Similarly, when receiving multiple pages, count the information amount of the encoded data received on the previous page and the average amount of encoded data received so far, and calculate the number of transmitted pages. The number of remaining transmissible sheets may be determined based on the value. This is because when transmitting multiple pages of originals at once, the encoded data of the originals are often similar.

[Effects of the Invention] According to the present invention, when proxy reception is performed and the remaining receivable number of sheets is determined during the transmission operation, the obtained remaining receivable number of sheets is accurate.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the control circuit 38 in the facsimile transmitter in the above embodiment. FIG. 3 is a flowchart showing the operation of the control circuit 38 in the facsimile receiver in the above embodiment. FIG. 4 is a diagram showing an example of the amount of transmitted information for different transmission conditions in the above embodiment. 22... Memory circuit, 30... Remaining transmittable number display circuit, 32... δ-included pointer address storage circuit, 34... Read pointer address storage circuit, 38... Control circuit. Patent applicant Canon Co., Ltd. Agent Arata Yokubo - Figure 1 Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) A facsimile device that stores image information in a memory, which always recognizes the remaining capacity of the memory on the receiver side and displays the number of remaining receivable sheets on the transmitter and receiver according to transmission conditions. Device. (2) The facsimile apparatus according to claim 1, wherein the transmission conditions include a size of information being transmitted, an encoding method, and a linear density. (3) In claim 1, the memory stores image information received after the recording paper runs out, and recognizes the remaining amount from the time when storage in the memory starts, A facsimile device characterized by displaying the number of remaining receivable sheets.