JPH029654A - Printing controller of page printer - Google Patents

Abstract

PURPOSE:To perform printing by outputting code data to a printer while successively decoding the same by a method wherein an external memory means stores the code data of one page along with the second memory means when the quantity of the code data of one page exceeds the capacity of the second memory means. CONSTITUTION:When the quantity of the code data of one page exceeds the capacity of the second memory part 16, the code data of the second memory part 16 is transmitted to an external memory part 18 on the basis of the output of a detection part 17 and, since the code data of one page is stored in the second memory part 16, an output part 20 successively reads the code data from the second memory part 14 and the external memory part 18 at the point of time when the coding of one page is finished and outputs printing data to a page printer 20 while decodes said code data to perform printing. A printing speed is increased by a memory means of reduced capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a print control device for page printers such as word processors and workstations.

BACKGROUND OF THE INVENTION FIG. 2 is a block diagram showing a conventional page printer print control device. The unit 3 is configured to develop one page or more than one page of print data into a storage unit 4 as a bitmap.

After the print data of one page or more than one page is developed into a bitmap in the storage section 4 as described above, the output section 5 sends the print data to the page printer 6 for printing.

In this manner, the conventional page printer print control device described above is also provided with a storage section 4 having a capacity of one page or more than one page of print data to realize page printing.

Problems to be Solved by the Invention However, in the conventional page printer printing control device described above, as the resolution of the page printer 6 increases and the printing area increases, the capacity of the storage unit 4 increases rapidly, and the printing speed slows down. There was a problem.

The present invention is intended to solve these conventional problems, and by using an encoding method, it is possible to create a page printer print control device that can print at a high printing speed using a storage means with a minimum capacity for storing bitmap data. The purpose is to provide

Means for Solving the Problems In order to achieve the above object, the present invention includes an encoding means for encoding the bitmap data of the first storage means, and a second encoding means for storing the encoded data encoded by the encoding means. a second storage means, a detection means for detecting whether the amount of encoded data for one page exceeds the capacity I of the second storage means, and a second storage means for storing the encoded data for one page of the detection means. external storage means for storing one page of encoded data together with a second storage means based on an output exceeding the capacity of the external storage means; and a decoding means for sequentially decoding the encoded data in the second storage means and the external storage means. and an output means for outputting the bitmap data of the decoding means to a printer.

Therefore, according to the present invention, when the amount of encoded data for one page does not exceed the capacity of the second storage means, the encoded data is decoded by the decoding means and outputted to the printer via the output means. Print.

When the amount of encoded data for one page exceeds the capacity of the second storage means, the external storage means stores the encoded data for one page together with the second storage means based on the output of the detection means, When the encoding for one page is completed, the encoded data in the second storage means and the external storage means are sequentially decoded by the decoding means and outputted to the printer via the output means for printing.

Embodiment FIG. 1 is a block diagram showing a page printer printing control device according to an embodiment of the present invention.

In FIG. 1, 11 is a first storage section that stores character and graphic code data, 12 is a second storage section that stores image data, and 13 is a generation section.
Bitmap data is generated from the code data and the image data in the second storage section 12.

14 is a first storage unit that stores the bitmap data of the generation unit 13; 15 is an encoding unit that encodes the bitmap data of the first storage unit 14; and 16 is an encoder that is encoded by the encoding unit 15. A second storage section 17 for storing encoded data is a detection means, which detects whether the amount of encoded data for one page exceeds the capacity of the second storage section 16. When the amount of encoded data exceeds the capacity of the second storage section 16, an output for storing encoded data for one page together with the second storage section 16 is sent to the external storage section 18.

19 is a decoding unit that sequentially decodes the encoded data in the second storage unit 16 and the external storage unit 18; 20 is the decoding unit 1;
This is an output unit that outputs the bitmap data of 9 to the page printer 21.

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

In the above embodiment, bitmap development in the first storage unit 14 is performed sequentially from the top of one page divided into a plurality of parts, and when the bitmap development of some of the divided parts is completed, the data is sequentially encoded by the encoding unit 15. become

Therefore, bitmap expansion and data encoding can be processed in parallel.

Next, an explanation will be given assuming that one page is divided into four equal parts.

First, the generation section 13 generates a bitmap based on the code data in the first storage section 11 and the image data in the second storage section I2, and expands it into the first storage section 14.

Then, the top data divided into four parts is stored in the first storage unit 14.
When the bitmap data in the first storage section 14 is completed, the encoding section 15 stores the encoded data in the second storage section 16 while encoding the bitmap data in the first storage section 14 .

In this way, the encoded data of each area divided into four equal parts is stored in the second storage unit 16.

At this time, the detection unit 17 detects whether the amount of encoded data for one page, which is being expanded into a bitmap, exceeds the capacity of the second storage unit 16.

Therefore, if the amount of encoded data for one page does not exceed the capacity of the second storage section 16 even after the encoding of one page is finished, the decoding section 19 retrieves the encoded data from the second storage section 16. Since the print data is sent to the output section 20 while being read and decoded, the output section 20 outputs the print data to the page printer 21 for printing.

If the amount of coded data for one page exceeds the capacity of the second storage unit 16, the coded data in the second storage unit 16 is transferred to the external storage unit 18 based on the output of the detection unit 17, 1
Since the second storage unit 16 stores code data for pages,
When the encoding for one page is completed, the output section 20 sequentially reads the encoded data from the second storage section 14 and the external storage section 18, and outputs the print data to the page printer 20 for printing while decoding it.

When printing for one page is completed as described above, the next page is partially developed and printed in the same manner.

Effects of the Invention As is clear from the above-mentioned embodiments, this invention is provided with the first and second storage means, so that the bitmap of the next page can be developed during printing. This has the effect of making it faster.

Note that the capacity of the first and second storage means is advantageously reduced to a fraction of that of the conventional example.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a page printer printing control device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional page printer printing control device. 11...first storage section, 12...second storage section, 1
3. Generation unit, 14 First storage unit, 15... Encoding unit, 16... Second storage unit, 17... Detection unit, 18
... external storage section, 19 ... decoding section, 20 ... output section, 21 ... page printer. Name of agent: Patent attorney Toshio Nakao and 1 other person Figure 2

Claims (1)

[Claims] a first storage means for storing code data of characters and figures, a second storage means for storing image data, a generation means for generating bitmap data from the code data and the image data, and the bitmap data. a first storage means for storing the bitmap data of the first storage means, an encoding means for encoding the bitmap data of the first storage means, a second storage means for storing the encoded data encoded by the encoding means; detection means for detecting whether the amount of encoded data for a page exceeds the capacity of the second storage means; and a detection means for detecting whether the amount of encoded data for one page exceeds the capacity of the second storage means. external storage means for storing the coded data for one page together with the second storage means based on the output; and decoding means for sequentially decoding the coded data in the second storage means and the external storage means. , and output means for outputting the bitmap data of the decoding means to the printer.