JPH01126072A - Encoding/decoding device - Google Patents

Abstract

PURPOSE:To prevent the irregular size of an output recording paper by inserting the dummy all white line of insufficiency when the line number of a page is fewer than a prescribed value and executing standardization processing which the whole line number of each page is standardized. CONSTITUTION:The code data of a received original is decoded by an encoding/ decoding circuit 1 under the control of an encoding/decoding control circuit 6. The line number from the head line of each page inputted to the circuit 1 and decoded by the circuit 1 is obtained by a line number counter 8 as a discrete value. A standardization processing control part 10 outputs all white line data until when this discrete value coincides with a value set to a set value register 7. When the control part 10 finishes outputting the all white line data, a changed page is informed to a printer part from the circuit 6 and the recording paper is cut by the printer part.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an encoding/decoding device such as a facsimile machine.

Conventional technology Conventionally, in the case of document transmission, in the encoding/decoding device of a facsimile machine, the image data of the transmission document that is input from the scanner section is sequentially encoded line by line and output to the transmitting/receiving section, and the end of the page is output from the scanner section. is notified, a control return code (R
TC code) to perform a page break. On the other hand, in the case of document reception, the coded data of the received document input from the transmitting/receiving section is decoded line by line from the first line of each page and output to the printer section, and when the RTC code is detected, it is judged that the page is over and a page break is started. conduct.

Problems to be Solved by the Invention However, with this configuration, there is a problem in that when a document containing pages of different sizes is received, the sizes of the output recording sheets become irregular. For example, when receiving an A4 size document, if there are A5 size pages mixed in the received document,
Only the output recording paper for this A5 size page is cut to the length of A5 size, and the output recording paper for the other pages is cut to the length of A4 size. If the sizes of the output recording sheets are irregular as described above, not only is it inconvenient to handle them, but also small-sized pages are likely to be lost.

The reason why such a problem occurs is that when the end of a page is detected by the scanner on the transmitting side, an RTC code is sent to start a page break without considering the number of lines in the page, and the receiving side detects the RTC code,
This is because a page break is performed without considering the number of lines within a page, and the recording paper (roll paper) is cut in the printer section.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an encoding/decoding device that has a fixed processing function for making the number of lines on each page constant.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention encodes or decodes data input from the outside using an encoding/decoding circuit, and outputs the encoded data or decoded data to the outside. The encoding/decoding apparatus includes a counting means for counting the number of lines of data of each page inputted to the encoding/decoding circuit, and a counting means for counting the number of lines of data of each page inputted to the encoding/decoding circuit; Dummy all-white line data to compensate for the shortfall from the set value of the count value of the counting means is output to the outside as decoded data of the page, or to the encoding/decoding circuit as input data of the page. The device has a configuration in which a means for inputting information is provided.

Operation According to the above-described structure, when the number of lines of a page to be encoded is insufficient for decoding and encoding, dummy all-white lines corresponding to the insufficient number are inserted into the page, and the lines of all pages are The number is adjusted to the specified value. Since such fixed processing regarding the number of lines is performed, by using the encoding/decoding device of the present invention in, for example, a facsimile machine, output recording paper can be made to have a constant length, and the above-mentioned Conventional problems will be resolved.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an encoding/decoding apparatus according to an embodiment of the present invention. This encoding/decoding device is used in a facsimile machine to encode image data of a transmitted document or decode coded data of a received document.

1 is the MR method (CCITT Recommendation T, MMR method in the recommendation)
CCITT Recommendation T, from the Recommendation, an encoding/decoding circuit for encoding image data and decoding coded data; 2 is an image data buffer for temporary storage of image data of transmitted/received originals; 3 is an image data buffer for transmitting/receiving. This is a code data buffer that temporarily stores the code data of the original. The image data buffer 2 has a toggle configuration in which two line buffers LBA and LBB are used alternately for data buffering of encoding lines or decoding lines or for data buffering of reference lines.

In the case of document transmission, that is, in the case of encoding operation, the image data of the transmitted document is input from the scanner section to the encoding/decoding circuit 1 via the image data buffer 2, and the encoded data is inputted to the encoding/decoding circuit 1 via the code data buffer 3. and outputs it to the transmitting/receiving section. In the case of document reception, that is, in the case of decoding operation, the coded data of the received document is stored in the coded data buffer 3 by the transmitting/receiving section.
The decoded data is input to the encoding/decoding circuit 1 via the image data buffer, and the decoded data is output to the printer unit via the image data buffer.

4 is a three-state buffer 7 for controlling the input of image data from the scanner section, and 5 is a three-state buffer for controlling the output of image data to the printer section.

6 is an encoding/decoding control circuit; the encoding/decoding circuit 1
Performs control related to encoding/decoding operations, such as operational control and data input/output control. This encoding/decoding control circuit 6
1 includes a routine processing control section 10 for controlling routine processing in cooperation with a set value register 7, a line number counter 8, and a comparison circuit 9.

The set value register 7 is set with the page specified number of lines specified by the user of the facsimile machine.

The line number counter 8 is for counting the number of lines of data of each page that is input to the encoding/decoding circuit 1 and encoded or decoded, and is controlled by the routine processing control section 10. The comparison circuit 9 is a circuit that compares the count value of the line number counter 8 and the set value of the set value register 7, and the comparison output is inputted to the routine processing control section 10.

Reference numeral 11 denotes an interface circuit between the encoding/decoding control circuit 6 and the main control section, scanner section, and printer section within the facsimile machine.

The operation of the encoding/decoding device configured as described above will be described below.

First, the case of document reception (decoding) will be explained. The code data of the received document is sequentially transferred to the code data buffer 3 from the transmitter/receiver section. This encoded data is sequentially input to the encoding/decoding circuit 1 under the control of the encoding/decoding control circuit 6.
Decrypted. This decoded data (image data) is sequentially stored in one line buffer (for example, LBB) selected for the decoded line in the image data buffer 2. When one line of decoded data is accumulated, the encoding/decoding control circuit 6 notifies the printer section via the interface circuit 11. If the transfer is possible, under the control of the encoding/decoding control circuit 1, the decoded data in the line buffer (LBH) is output to the printer unit via the three-state buffer 5, and recorded on roll recording paper by the printer unit. be done.

When the output of the decoded data is finished, the encoding/decoding control circuit 6 switches the line buffer (L B H) in the image data buffer 2 to the reference line, and the other line buffer (LBA) is switched for decoding. Can be switched for conversion line. Note that the contents of the line buffer (LBA or LBB) for the reference line are referred to by the encoding/decoding circuit 1 when decoding the decoding line, but when decoding the first line of each page, the contents of the line buffer (LBA or LBB) are referenced by the image data buffer 2.
A line buffer (LBA) for at least the reference line in
or LBH) is set, and its stored data is set to the data of the all-white line.

The line number counter 8 is reset by the standard processing control unit 10 of the encoding/decoding control circuit 6 immediately before the start of decoding of each page, and then the line end code (EOL code) is input from the code data buffer 3. is incremented every time. Therefore, the number of lines from the first line of each page input to the encoding/decoding circuit 1 and decoded is obtained as a count value in the line number counter 8.

If an RTC code is input from the code data buffer 3 before a match signal is output from the comparison circuit 9, the encoding/decoding control circuit 6 inhibits the operation of the encoding/decoding circuit 1, and the image data buffer 2 is still reset. and its contents are set to all white data. Next, under the control of the standard processing control section 10, data for all white lines is output from the image data buffer 2 to the printer section. The routine processing control unit 10
Each time one line of all-white line data is output, the line number counter 8 is incremented and the comparison output of the comparison circuit 9 is checked. If this comparison output indicates a mismatch, one line of all-white line data is output. In this way, all-white line data is output until the comparison output of the comparison circuit 9 indicates a match (a dummy all-white line is inserted in the latter half of the page).

When the comparison output of the comparison circuit 9 indicates a match, the standard processing control section 10 finishes outputting the all-white line data.

Then, the page break is notified to the printer section via the encoding/decoding control circuit 6 and the interface circuit 11, and the printer section cuts the recording paper.

FIG. 2 is an explanatory diagram of such a page with an insufficient number of lines. 13 is the actually received line portion in the page, and 14 is the inserted dummy all-white line portion. The number of lines in this part 14 is the set value PLO and the part]
It is equal to the difference from the number of lines of 3.

In this way, for pages where the number of lines is less than the specified value PLO, the total number of lines is adjusted to the specified value by inserting dummy all-white lines, so that the output recording paper has a constant length.

Up to this point, the standard processing for pages with an insufficient number of lines has been described, but the standard processing for pages in which the number of lines exceeds a specified value will now be described.

When such a page is received, the comparison circuit 9 outputs a coincidence signal before the RTC code is input from the code data buffer 3. When the routine processing control section 10 recognizes this coincidence signal, the encoding/decoding control circuit 6 interrupts the main control section of the facsimile machine. On the other hand, when a processing interruption instruction is given, the encoding/decoding control circuit 6 suspends the decoding operation.

On the other hand, when an instruction to continue processing is given from the main control unit, the encoding/decoding control circuit 6 suppresses the operation of the encoding/decoding circuit 1, notifies the printer unit of a page break, and transfers the image data buffer 2 to the image data buffer 2. Set the line buffer (for example, LBA) in which the data of the current decoded line of is stored as the reference line, reset the other line buffer (LBH),
The line number counter 8 is also reset. Then, the encoding/decoding circuit 1 is activated to decode the remaining data of the page as data of a new page. If the number of lines is insufficient for this page as well, standard processing is performed by inserting dummy all-white lines in the same way as for normal pages.

Next, the case of document transmission (encoding) will be explained. The image data of the transmission document transferred from the scanner unit is input to the image data buffer 2 via the three-state buffer 4 under the control of the encoding/decoding control circuit 6, and one line selected for the encoding line is inputted to the image data buffer 2 via the three-state buffer 4. Buffer (e.g. LB
B). Note that the start and end of each line and the end of a page are notified from the scanner unit to the encoding/decoding control circuit 6 via the interface circuit, and each line buffer in the image data buffer 2 is notified before the start of transferring the image data of each page. LBA and LBH are set by the encoding/decoding control circuit 6.

Under the control of the encoding/decoding control circuit 6, the image data of the line buffer for encoding line (L B H) and the image data of the line buffer for reference line (L B A) (
Margin line data (for the first line of the page) is input to the encoding/decoding circuit 1, where the image data of the encoding line is sequentially encoded, and the encoded data (coded data) is sent to the transmitter/receiver via the encoded data buffer 3. is output to and sent. Note that an EOL code is inserted at the beginning of the first line of each page and at the end of each line.

The line number counter 8 is reset by the standard processing control unit 10 immediately before the start of encoding each page, and is incremented each time one line of image data is input to the encoding/decoding circuit 1 and encoded.

Therefore, the line counter 8 obtains the number of lines from the first line of each page input to the encoding/decoding circuit 1 and encoded.

If the end of the page is notified from the scanner section before a match signal is output from the comparison circuit 9, the encoding/decoding control circuit 6 prohibits the transfer of the next page of data from the scanner section, and then the encoding line One line buffer (
For example, only the LBA) is reset and the same encoding operation is performed. That is, dummy all-white line data is sequentially input to the encoding/decoding circuit 1 as encoded line data to be encoded.

The regular processing control unit 10 increments the line number counter 8 and checks the comparison output of the comparison circuit 9 every time one line of all-white data is input. When the standard processing control unit IO recognizes that this comparison output is a coincidence signal, a page break is sent from the encoding/decoding control circuit 6 to the encoding/decoding circuit 1.
The RTC code (EOL code string) is output after the code data.

In this way, even in the case of transmission, for pages whose number of lines does not meet the specified value, dummy all-white line data corresponding to the number of missing lines is input to the encoding/decoding circuit 1 and encoded. . Therefore, even if the encoding/decoding device of the receiving facsimile machine does not have a standard processing function, the length of the output recording paper for each page is constant, and the problem of uneven recording paper size as in the past does not occur. .

On the other hand, if the number of lines on the page exceeds the specified value, the following operation will occur. In the case of such page transmission, a seek signal is output on the comparator circuit before the page end notification is sent. When this coincidence signal is generated, the encoding/decoding control circuit 6
interrupts the main control section of the facsimile machine. On the other hand, when a processing interruption instruction is given, the encoding/decoding control circuit 6 suspends the encoding operation.

On the other hand, when an instruction to continue processing is given from the main control section, the encoding/decoding control circuit 6 notifies the encoding/decoding circuit 1 of a page break and outputs an RTC code. Then, the remaining data of the page is encoded as data of a new page. If the number of lines is insufficient for this page as well, standard processing is performed by inserting dummy all-white lines in the same way as for normal pages.

Although an example of an encoding/decoding apparatus used in a facsimile machine has been described above, the present invention can also be applied to similar encoding/decoding apparatuses used for other purposes. Furthermore, the present invention is equally applicable to devices that perform only one of encoding and decoding.

Effects of the Invention As is clear from the above description, when the number of lines on a page is less than a specified value, the present invention can reduce the total number of lines on each page by inserting dummy all-white lines to cover the shortage. Since a fixed format process is performed, it is possible to prevent irregularities in the size of output recording paper, which has been a problem in facsimile machines.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an encoding/decoding apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of stylization processing. DESCRIPTION OF SYMBOLS 1... Encoding/decoding circuit, 2... Image data buffer, 3... Code data buffer, 6... Encoding/decoding control circuit, 7... Setting value register, 8... Line number counter, 9... Comparison circuit, 10... Standard processing control section.

Claims (1)

[Claims] In an encoding/decoding device that encodes or decodes data input from the outside using an encoding/decoding circuit and outputs the encoded data or decoded data to the outside, each page input to the encoding/decoding circuit is A counting means for counting the number of lines of data, and a dummy counter for compensating for the shortfall from the set value of the count value of the counting means at the time when the data of the last line of each page is input to the encoding/decoding circuit. An encoding/decoding device comprising means for outputting white line data to the outside as decoded data of the page or inputting it to the encoding/decoding circuit as input data of the page.