JPS62123870A - Store and forward data management system for facsimile equipment - Google Patents

Abstract

PURPOSE:To facilitate data management control and to reduce an area of a management information storage section to a few prescribed number by storing one bit of idle information and an end address in a block as management information. CONSTITUTION:A CPU3 retrieves a management information storage section of a store and forward equipment 13 is first to detect whether or not an idle block exists. When an idle block exists, a head address of the block is read and the picture information to be inputted in written in the picture information storage section of the equipment 13 sequentially from the read head address. In this case, the idle information of the management information storage section corresponding to the block is brought into '1' to write the end address in the block. The operation above is repeated until the input is finished. In erasing the picture information, the idle information of the management information storage section has only to be made $0' to facilitate the input/output control and erasure of the picture information.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a storage data management system for a facsimile machine having a fixed-length block storage device.

[Technical background of the invention]

Recently, communication systems for communicating between facsimile machines equipped with storage devices have become popular. In this communication system, all the image information sent from the sending side is temporarily stored in a storage device provided in the facsimile machine on the receiving side, and the operator specifies the necessary image information and records it.

[Problems with background technology]

However, in this communication method, the received image information is stored from the beginning of the storage device, so it is necessary to store the start address and end address of the image information file as management information for one image information file. was there. In addition, when attempting to erase a certain area in the storage device and store image information there, and the data length of the image information to be stored is longer than the area, the start address and end address of this area and the next It was necessary to store the input source start address as management information. As described above, the communication system has a problem in that it requires a large amount of management information and a large area to store it. In addition, since the image information file of the storage device is a variable length file, it is complicated to control the deletion and input of each uniform information file.
Since the maximum number of image information files to be stored is not determined, there is a problem that the number of necessary management information is not determined.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a facsimile apparatus accumulated data management system in which the number of management information is small and constant and easy to control, in order to eliminate the above-mentioned problems.

[Summary of the invention]

In order to achieve the above object, the present invention divides the image information storage section of the storage device into a plurality of fixed length blocks, and includes a start address storage section that stores the start address of each block and a management section that stores empty information of each block. an information storage section provided in the storage device, a detection means for reading the management information and detecting a vacant space in each block, and an input/output means for inputting and outputting image information for each block from the first address of each block. , and a writing means for writing free information of each block into the management information storage section.

[Embodiment of the Invention] Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to this embodiment. As shown in the figure, the facsimile machine 1 includes a central processing unit (CPU) 3. Read only memory (ROM) 5° random access memory (RAM)
7, a communication control section 11 that controls communication with other facsimile devices, and a storage device interface section 15 that interfaces with the storage device 13 are connected by a bus 17. have

Note that the document reading section, recording section, and code/decoding section are omitted because they are not directly involved in the present invention. The image information storage section 19 of the storage device 13 is divided into, for example, N fixed-length blocks as shown in FIG. 2(b).

This storage device 13 includes a start address storage section 21 for storing the start address of each block as shown in FIG. 2(a), and a free space in each block as shown in FIG. 2(C). A management information storage section 23 is provided in which information and end addresses within the block are stored. An area of IXN bits is provided as free space information in the management information storage section 23, and if this area is 1', it is in use, and if this area is O', it is empty.

Next, the storage device 13 is sent by such a facsimile device.
The operation when writing image information to the image information will be explained with reference to the flowchart shown in FIG. In step 301, the CPU searches the management information storage unit 23 and detects whether there is an empty block. If there is an empty block, the start address of the block is read from the start address storage unit 21, and in step 303, image information to be inputted sequentially from the read start address is written into the image information storage unit 21, and in step 305, the block is The empty information in the management information storage unit 23 corresponding to the block is set to 1', and the end address within this block is written. Then, in step 307, the above operations are repeated until the input is completed. If there is no empty block in step 301, reception is rejected.

Note that if all the image information has not been written in a certain block but has been written halfway, that block is considered to be in use.

Furthermore, to erase image information, it is sufficient to set the free space information in the management information storage section to 0'.

To record the image information, the image information is read from the beginning of a predetermined block in the image information storage section 19 of the storage device 13.

As described above, in this embodiment, it is sufficient to store the empty information and the end address in each block as management information, and it is easy to control the input and output of image information, and it is also easy to erase the image information.

〔Effect of the invention〕

As explained in detail above, according to the present invention, since it is only necessary to store one bit of free information and the end address within a block as management information, the area of the management information storage section can be reduced, and the necessary management This has the advantage that the amount of information is also fixed. Furthermore, it becomes easy to control input/output and deletion of individual image information files.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to an embodiment of the present invention, and FIG. 2 is a memory diagram of a start address storage section, an image information storage section, and a management information storage section in the storage device.
FIG. 3 is a flowchart of the write operation of this embodiment. 1...Facsimile machine, 3...CPU, 11...
- Communication control l1 section, 13...Storage device, 15...Storage device interface section. Figure 2 Figure 3

Claims (1)

[Scope of Claims] A facsimile device that inputs transmitted image information to a storage device, specifies image information, and outputs the specified image information from the storage device, comprising: an image information storage section of the storage device; The storage device is divided into a plurality of fixed-length blocks, and is provided with a start address storage unit that stores the start address of each block and a management information storage unit that stores empty information of each block, and reads the management information and stores each block. A detecting means for detecting the empty space of a block, an input/output means for inputting and outputting image information for each block from the first address of each block, and a writing means for writing the empty information of each block in the management information storage section. A storage data management method for a facsimile machine, characterized in that: