JP2002278726A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer capable of reducing transfer quantity and processing speed of data and shortening print time. SOLUTION: In a printer driver in which the printer and a PC are connected with a network, etc., and to transmit data printed from application of the PC to the printer by each of plotting objects such as images, graphics, characters, appearance frequency is calculated in a character code in character data among pieces of character data to be transmitted from the application to the printer, a character code with the small number of bits is allocated in an order from the character with high appearance frequency and a correspondence table between the allocated character code and a standardized character code such as shift JIS is transmitted to the printer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer driver in a printer device, and more particularly to a printer device capable of reducing document data during data transfer.

[0002]

2. Description of the Related Art Conventionally, it is general that a plurality of host computers share one printer.
In this case, as the number of connected host computers increases, a problem such as a longer print time (processing speed) for each host computer occurs. For this reason, conventionally, when transferring document data, measures such as compression and decompression of the data are taken. Then, for example, in the one disclosed in Japanese Patent Application Laid-Open No. 9-258920, after a character string is compressed, the print system includes a compression unit that converts the character string into a printer internal code and registers the code in a conversion table. Describes a technique for reducing the processing load on the printer side.

[0003]

However, in the case of the above-mentioned prior art, when printing a document or the like having many characters, for example, when character data is transmitted to the printer by a fixed method of 2 bytes per character, data is transmitted. There is a problem that the processing time and the printing time are long because the amount is large.

Accordingly, the present invention solves the above-mentioned problems of the conventional printer device, and provides a printer device capable of reducing the data transfer amount and processing speed and shortening the printing time. It is in.

[0005]

According to the present invention, in order to achieve the above object, the present invention relates to a printer device and a printer.
C is connected to a network or the like and sends data printed from an application on the PC to the printer for each drawing object of image, graphics, and character. The appearance frequency is calculated for the character codes in the data, the character codes with the smaller number of bits are assigned in order from the character with the highest appearance frequency, and the correspondence table between the assigned character codes and the standardized character codes such as shift JIS is created. It is characterized in that it is sent to a printer device.
Also, a character code with a small number of bits is assigned to a word having a high frequency of appearance, and the assigned character code and shift JI
When a conversion table of standardized character codes such as S codes is sent to the printer side, character codes with a smaller number of bits are assigned in order from the character having a higher frequency of occurrence, and the assigned character code is shifted. Since the correspondence table with the character codes standardized by JIS etc. is sent to the printer device, the data amount does not increase, thereby reducing the data transfer amount and the processing speed,
Printing time can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a printing apparatus according to the present invention will be described below with reference to the drawings. Here, a feature of the first embodiment of the present invention is that a printer device and a PC are connected to a network or the like, and a printer that sends data printed from an application of the PC to the printer device for each image, graphics, and character drawing object. In the printer driver of the device, of the character data sent from the application to the printer, the appearance frequency is obtained for the character code in the character data, and the character code having a smaller number of bits is assigned in order from the character having the higher appearance frequency, and the assigned character is assigned. An object of the present invention is to send a correspondence table between codes and standardized character codes such as shift JIS to a printer device.

That is, the flowchart of FIG. 1 shows the first embodiment (printer A) of the present invention, and the control is performed as follows. (1) Check the appearance frequency of character data of data printed from the application. (2) Character codes are allocated and encoded in accordance with a policy of allocating a small number of bits to characters having a high appearance frequency (character code encoding). (3) Create a correspondence table between encoded character codes and standardized character codes such as Shift JIS code (encoding correspondence table creation). (4) Send the character code correspondence table and the encoded character code to the printer.

A feature of the second embodiment of the present invention is that only the assigned character code is sent to the printer, and the printer recognizes and prints the corresponding character from the character code sent from the PC. .

That is, the flowchart of FIG. 2 shows a second embodiment (printer B) of the present invention, and the control is performed as follows. (1) Check the appearance frequency of character data of data printed from the application. (2) A character code is assigned and encoded by a method of assigning a small number of bits to a character having a high appearance frequency. (3) Send the encoded character code to the printer. (4) The printer recognizes the character from the encoded character code. Here, the recognition method at this time is performed by the reverse method of the algorithm of encoding the character code by the PC (decoding printing).

A feature of the third embodiment of the present invention is that a word code having a small number of bits is assigned to a word having a high appearance frequency, and the assigned character code and shift JIS are assigned.
A conversion table of a standardized character code such as a code is sent to the printer.

That is, the flowchart of FIG. 3 shows a third embodiment (printer apparatus C) of the present invention, and the control is performed as follows. (1) The character string of the document is looked at from the beginning, and matching is performed with the dictionary. At this time, matching is performed by the algorithm of the longest match method. Here, the above-described dictionary includes character string data of words and terms (such as technical terms). (2) Look up to the end of the document and find the appearance frequency of the character string. (3) A character string code with a shorter bit number is assigned and encoded in order from a character string or a character having a higher appearance frequency of the character string (character string encoding). (4) Create an encoding correspondence table, which is a correspondence table between the encoded character string codes and the standardized character string codes such as shift JIS. (5) The character string code encoded on the printer side and the correspondence table (encoded correspondence table) created in (4) are sent to the printer side.

A feature of the fourth embodiment of the present invention is that a character code correspondence table is not transmitted to the printer side, and a character code assigned on the PC side by the printer side is converted to a corresponding standardized shift code. It is to recognize a character code such as JIS.

That is, the flowchart of FIG. 4 shows a fourth embodiment (printer device D) of the present invention, and the control is performed as follows. (1) The character string of the document is looked at from the beginning, and matching is performed with the dictionary. At this time, the matching is performed by the algorithm of the longest match method. Here, the dictionary includes character string data of words and terms (such as technical terms). (2) Look up to the end of the document and find the appearance frequency of the character string. (3) A character string code with a shorter bit number is assigned in order from a character string or a character having a higher appearance frequency of the character string. (4) Send the character string code coded to the printer to the printer. (5) On the printer side, the character string code sent from the PC side and encoded is decoded by the reverse algorithm and printed.

[0014]

According to the present invention, as described above, a printer device and a PC are connected to a network or the like, and data printed from an application of the PC is converted into an image, graphics,
In a printer driver that sends each drawing object of a character to a printer device, of character data to be sent from an application to a printer, a character code in character data is used to determine an appearance frequency, and a character code having a smaller number of bits in order from a character having a higher appearance frequency , And a correspondence table between the assigned character codes and standardized character codes such as shift JIS is sent to the printer device, so that the data amount does not increase. There is an effect that the processing speed can be reduced and the printing time can be reduced. That is, a character string or a character with a high frequency of appearance is assigned a character code with a small number of bits to a character code and transmitted to the printer side, so that the data transfer amount can be reduced, and the processing load on the host side can be reduced. Has the effect that the printing time can be shortened with little increase.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a control operation according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a control operation according to a second embodiment of the present invention.

FIG. 3 is a flowchart showing a control operation according to a third embodiment of the present invention.

FIG. 4 is a flowchart showing a control operation according to a fourth embodiment of the present invention.

[Explanation of symbols]

 A, B, C, D printer device

Claims (4)

[Claims] 1. A printer driver for a printer device, wherein the printer device and a PC are connected to a network or the like, and the printer driver of the printer device sends data printed from an application of the PC to the printer device for each image, graphics, and character drawing object. Of the character data in the character data to be sent, the character code with the smaller number of bits is assigned in order from the character with the highest appearance frequency, and the assigned character code is standardized by shift JIS, etc. A printer for transmitting a correspondence table of the character codes to the printer. 2. The printer device according to claim 1, wherein only the assigned character code is sent to the printer, and the printer recognizes and prints the corresponding character from the character code sent from the PC. . 3. A character code having a small number of bits is assigned to a word having a high frequency of occurrence, and a conversion table of the assigned character code and a standardized character code such as a shift JIS code is sent to the printer. Claim 1
Or the printer device according to 2. 4. A standardized shift JIS corresponding to a character code assigned on the PC side of the printer without transmitting the correspondence table of the character code to the printer side.
4. A character code for recognizing a character code such as
The printer device according to 1.