JPH04196872A - Encoding system - Google Patents

Abstract

PURPOSE:To shorten the signal time when document data are converted and compressed into image data by converting and compressing the margin part subsequent to a page changing code into a full-white line code directly when the document data are converted and coded into the image data. CONSTITUTION:An image data converting part 6a converts a character code in received document data into image data and writes it in a line buffer 5 and a compressing part 16 codes and compresses the data of the line buffer 5 line-sequentially. When a page changing code is detected in the document data, the image data converting part 6a ends the compression processing of a page by the compressing part 16 and notifies to a page changing code processing part 12. Thus, the page changing code processing part 12 converts the whole lines of a margin part into fixed full-white line codes.

Description

[Detailed Description of the Invention] (Summary) The present invention relates to an encoding method, and aims to reduce the processing time when converting document data to image data and compressing it. The image data converter includes an image data converter that writes to a buffer, a compressor that sequentially encodes data in the line buffer, and a page break code processor, and the image data converter converts the page break code into the document data. When detected, the page break code processing unit notifies the blank space after the page break code and causes the compression unit to finish the encoding process of the page, and the page break code processing unit decodes all of the notified blank space. It encodes lines into a predetermined all-white line code, and when converting document data to image data and encoding, the margin after the page break code is directly converted to an all-white line code and compressed. Configure.

[Industrial application field]

The present invention relates to improvements in encoding methods.

In recent years, facsimile devices have been realized that transfer document data created on a computer to a destination via facsimile communication.

Since this facsimile device is configured to receive document data from a computer, convert it into image data, compress the data, and transmit the data, it is necessary to speed up the compression process.

[Conventional technology] FIG. 3 is a configuration diagram of a conventional example.

FIG. 3 shows an example of a configuration in which a facsimile device FAX 31 connected to a personal computer PC30 receives document data from the PC30 and transmits it by facsimile to a destination FAX 32. While receiving data in units of transfer, character codes in the document data are converted to image data, data is compressed, and then transmitted.

In the figure, a line buffer 5 of a FAX 31 is used for reading a document, receiving and outputting the document, and a converter 6 receives at least one line of document data, and while referring to a character generator CG 7, The character code is converted into image data and written to the line buffer 5. Further, the compression/decompression unit 4 refers to the image data in the line buffer 5, compresses the image data line by line, and stores it in the compressed data memory 9.

When the conversion for one line is completed, a request is made to the PC 30 to transfer data for the next line.

Note that when writing image data to the line buffer 5, the conversion unit 6 writes the image data in a predetermined position according to the paper size and the number of 9-digit lines based on a predetermined document format, and also writes the image data in the margin area. The white data is written (cleared), and the compression/decompression unit 4 performs compression processing on all lines corresponding to the paper size.

As described above, the FAX 31 receives document data from the PC 30, converts it into image data, compresses it, and transmits it to the FAX 32 through the communication control unit IO.

[Problem to be solved by the invention]

The data compression process of the facsimile machine is performed for all lines of a predetermined sheet of paper.

The same applies when converting document data to image data and compressing it. If a page break code is detected in the document data, the subsequent margin lines are converted to image data with all white lines (one line is all white) and compressed. Processing is taking place.

Document data is received from the computer in transfer units in synchronization with this compression process, and even if there is a page break code, the next line will not be received until the margin compression process is completed. I can't.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an encoding method that improves the processing after receiving a page break code and shortens the processing time for receiving document data.

[Means to solve the problem]

In FIG. 1, a diagram showing the principle of the present invention, 6a is an image data converter, which, when detecting a page break code in document data, notifies it of the margin after the page break code, and ends the compression process for that page.

Reference numeral 12 denotes a page break code processing unit which encodes all the lines of the notified blank area into a predetermined all-white line code and adds it to the compressed data up to the previous line.

A compression unit 16 encodes and compresses the image data converted by the image data conversion unit 6a line-sequentially.

[Function] The image data conversion section 6a converts the character code in the received document data into image data and writes it into the line buffer 5, and the compression section 16 encodes the data in the line buffer 5 line sequentially. Compress.

When a page break code is detected in the document data, the image data conversion unit 6a causes the compression unit 16 to finish the compression process for that page, and notifies the page break code processing unit 12.

As a result, the page break code processing unit 12 converts all lines in the margin portion into a predetermined all-white line code (a code indicating that one line is all white).

As mentioned above, the blank space after the page break code is not compressed by converting it to image data (it is directly converted to an all-white line code, which greatly shortens the compression time and therefore the reception time. Ru.

[Example] Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of one embodiment. In the figure, 3 is the fF section (
The interface unit) receives document data from the connected computer.

6a is an image data conversion unit that converts the character code in the received document data into image data and writes it to the line buffer 5. If a page break code is detected, the character code is written in the line of the page break code. If so, convert that line to image data and write it to line buffer 5, then
If not, the number of blank lines is immediately stored in the memory 13 and notified to the processor CPU 8 by an interrupt or the like.

Reference numeral 12 denotes a page break code processing unit which, upon receiving the page break code detection notification, stores predetermined margin line codes in the compressed data memory 9 for the number of margin lines set in the memo January 3.

Reference numeral 13 denotes a memory in which all-white line code 1 document shadow type information is stored in advance, and the number of margin lines after the page break code is stored by the image data converter 6a.

Note that the reading unit 1. Recording section 2. Compression/decompression unit 4. The line buffer 5, the processor CPU 8, and the communication control unit IO1 operation unit 11 include a FAX unit for performing facsimile communication;
The part surrounded by the broken line in the figure is the receiving part of the document data, and the same reference numerals represent the same objects throughout the figures.

Here, the all-white line code differs depending on the coding system, but according to the MH coding system used in facsimile machines, it is defined as follows in the case of A4 size. Note that the latter 12 bits are EOL indicating the end of one line.

Store this all-white line code in advance in the memo January 3,
Referring to this, all white line codes corresponding to the number of blank lines are stored in the compressed data memory 9 following the compressed data of the previous line.

With the above configuration, the following document data reception processing is performed. Note that it is assumed that the document format information is set in advance.

When at least one line of document data is received from the connected computer through the IF section 3, the image data converting section 6a converts the character code of the first line, following the margin up to the first line, into image data. , are sequentially written into the line buffer 5, and the compression/decompression unit 4 starts compression processing.

At this time, the image data converter 6a counts the number of written lines.

When the compression process for one line of document data is completed,
The next row of data is received and sequentially converted to image data and compressed.

Here, when a page break code is detected in the document data, the image data converter 6a converts the line into image data if there is a character code, writes it to the line buffer 5, and then converts the line into image data. Immediately set the number of written lines in the compression/decompression unit 4, finish the compression process for that page, set the number of remaining margin lines in the memo 3, and
Interrupt into s.

As a result, the page break code processing section 12 is started, and the page break code processing section 12 extracts the all-white line code and the number of margin lines from the memo January 3, and compresses the all-white line code for the number of margin lines from the previous line. Following the data, it is stored in the compressed data memory 9.

When the storage of the all-white line code is completed, the process returns to the image data converter 6a, and requests the computer to transmit the document data of the next page.

As described above, the margin lines after the page break code is detected are not converted to image data and compressed, but are directly converted to all-white line code and stored in the compressed data memory 9, which greatly reduces the compression processing time. The next page can be received quickly, and the reception time is shortened.

[Effects of the Invention] ” As explained above, the present invention can convert document data into image data and compress it if a page break code exists.
The following margins are directly converted to compressed data of the front white line without being expanded into image data, which shortens the data compression processing time, and if the document data is received while being compressed, the reception time of the document data is shortened. play.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of the present invention, Fig. 2 is a configuration diagram of an embodiment,
FIG. 3 is a block diagram of a conventional example. In the figure, 1 is a reading section, 2 is a recording section, 3 is an IF section, 4 is a compression/decompression section, 5 is a line buffer, 6 is a conversion section, 6a is an image data conversion section, 7 is a character generator CG,
8 is a processor CPU, 9 is a compressed data memory,
10 is a communication control unit, 11 is an operation unit, 12 is a page break code processing unit, 13 is a memory, and 16 is a compression unit.

Claims (1)

[Claims] Document data is converted to image data and line buffer (
5); a compression unit (16) that sequentially encodes the data in the line buffer; and a page break code processing unit (12); 6a) is for, when a page break code is detected in the document data, notifying the margin area after the page break code and terminating the encoding process of the page by the compression unit; The code processing unit (12) encodes all the lines of the notified blank area into a predetermined all-white line code, and when converting document data into image data and encoding it, it encodes all lines after the page break code. An encoding method characterized by directly converting and compressing blank areas into all-white line code.