JPS62183666A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To effectively transmit from a facsimile equipment exclusively used for the A5 size to the facsimile equipment exclusively used for the A4 size or more by previously dividing a RAM so as to have 1728 bits for respective lines, and previously writing a white picture signal in all the bits. CONSTITUTION:Picture data of 'white' is stored in all the bits of the RAM 3. From the leading bit of one line on the RAM 3 of 'white', the binarized picture data is overwritten successively. When coming to the 1,152-th bits, if one page is not completed, the picture data is stored in the RAM 3 by moving to the leading bit of the next line. Thereby, in the one line, in the bit above the number of all the bits of the one line used for the A5 size, all the 'white' data is stored. Accordingly, an original can be transmitted to the facsimile equipment for the A4 size or more from the facsimile equipment exclusively used for the A5 size.

Description

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

[Prior Art] In a normal facsimile machine, the minimum document size that can be transmitted and received in G2) and G3 modes is A4 size. By the way, there are users who think that it is sufficient to send and receive originals of up to A5 size, and for these users, the above-mentioned facsimile machine has the drawback of being expensive.

In order to solve this drawback, an A5-size facsimile machine that can send and receive A5-size originals has been proposed.

However, in that A5 size facsimile machine,
If the A5 size document is sent to a facsimile machine that can read and receive documents larger than A4 size, one line of image data will be too short. Because of this, there is a problem that the receiving side may judge it as an error.

[Purpose of the Invention] The present invention has been made by focusing on the problems of the conventional devices described above, and allows reliable transmission from a facsimile machine dedicated to A5 size to a facsimile machine capable of transmitting and receiving documents larger than A4 size. The purpose of this invention is to provide a facsimile device that can perform the following functions.

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

In FIG. 1, the CPU that controls the entire facsimile machine is operated by software stored in ROM 2, and includes RAM 3, display section 4,
Operation section 5, recording section 6, image reading section 7. Modem section8. N.C.
U (network control circuit) 9 is controlled.

Here, the RAM 3 stores image data read by the image reading section 7, data recorded by the recording section 6, or the analog image signal passed through the telephone line 1O1NCU9 is demodulated by the modem section 8. This is a memory that stores binary data.

The display section 4 is composed of an LCD or the like having a display digit of 16 characters, and displays predetermined characters, symbols, etc. under the control of the CPU 1.

The operation unit 5 is composed of keys for starting transmission, reception, etc., a mode selection key for determining the transmission/reception mode, a numeric keypad, etc., and the CPU detects the operation of these keys and controls each unit according to the operation status. control.

The recording unit 6 is composed of a DMA controller, a CPU other than the cptri, a thermal head, a TTL-IC, etc.
The record data stored in 3 is read out and printed out.

The image reading unit 7 uses a DMA controller, a CPU different from the CPU 1, a thermal head, a TTL-IC, etc.
The image data read by an image reading element such as a COD is binarized under the control of the CPU, and the value is stored in the RAM 3.

The modem fi8 is composed of an FM modem for G3, G2, and Gl, and a clock generation circuit that sends a clock to this FM modem. Based on the control of the CPU, it modulates the transmission data stored in the RAM 3, and also Line 10. This demodulates the analog image signal that has passed through NCH3. The modulated data is output to the telephone line 10 via the NCH3, and the modulated binary data is stored in the RAM3.

NCH3 connects the telephone line 10 based on the control of the CPUI.
is selectively connected to either the modem section 8 or the telephone set 11.

FIG. 2 is a block diagram for processing image signals in the above embodiment.

In this figure, the CCD 15 and the binarization means 16 are
The image data read by the CCD 15 provided in the image reading section 7 is binarized by the binarization means 16, and this binarized image data is stored in the RAM 3.

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

FIG. 3 is a diagram showing the memory configuration of the RAM 3 in the above embodiment.

As shown in FIG. 3, the RAM3 is divided in advance so that each line has 1728 beats, and the RA
A white image signal is written in advance to all bits of M3.

FIG. 4 is a flowchart showing the operation of the above embodiment.

First, as described above, "white" image data is stored in all bits of RAM 3 (Sl), and then the binarized image data is sequentially stored starting from the first bit of one line on RAM 3 that is "white". (32), the number of bits of one line of A5 size is 1152 bits, this number of bits is determined, and memory storage (overwriting) of one image data is repeated until it reaches 1152 bits (S3 ).

If the 1152nd bit is reached, check whether the first page has ended or not (S4). If the first page has not ended, move to the beginning of the next line and store the image data in RAM3.
(S5), and when the storage of one page's worth of data for processing from S2 onwards is completed (S4), the image reading operation ends.

In this way, in one line, "white" data is stored in all bits equal to or larger than the total number of bits fi (1152 bits) of one line for A5 size. in this case,
The "white" data above is dummy bits, and when these dummy bits are included, the total number of bits for each line is 1728 bits, which is the same as the pill for one line for A4 size. .

Therefore, from a facsimile machine exclusively for A5 size,
To transmit a document without causing an error to a facsimile device that can send and receive documents larger than the size of the document.

[Effects of the Invention] According to the present invention, from a facsimile machine exclusively for A5 size,
This has the effect of being able to reliably send documents to and from facsimile machines that can send and receive documents larger than A4 size.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention. FIG. 25 is a block diagram for processing image signals in the above embodiment. FIG. 3 is a diagram showing the memory configuration of the RAM in the above embodiment. 54 is a flowchart showing the operation of the above embodiment. 1...CPU, 2...ROM. 3...RAM. 6... Recording department. Patent applicant Canon Co., Ltd. Agent Arata Yokubo - Figure 2

Claims (2)

[Claims] (1) From an A5 size facsimile machine to a facsimile machine that can send and receive documents larger than A4 size,
A facsimile machine characterized by adding dummy bits to each line before transmission. (2) In claim 1, the facsimile machine exclusively for A5 size has a memory, and each line of this memory is divided in advance so that each line has 1728 bits, and all the bits of the memory are A facsimile machine characterized in that a white image signal is written in advance on the line, and 1152-bit image data is written on each line.