JP2014012354A - Data processor, recorder, data processing method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a delay associated with expansion processing of compressed data to be prevented while suppressing a capacity of a storage area where font data are stored in a recorder.SOLUTION: A printer 20 comprises: a printing unit 41; a ROM 31 that stores compressed font data for each characters and a compressed data index 35 for associating each character code with a storage address where the compressed font data of characters corresponding to each character code are stored in the ROM 31; a compressed data acquisition section 25 that acquires a storage address of compressed font data 31A corresponding to a character code of characters of a printing object on the basis of the compressed data index 35 and reads out the compressed font data according to the storage address acquired; an expansion processing section 26 for expanding the compressed font data in a font expansion area 38; and a printing control section 27 that controls the printing unit 41 and prints the characters of the printing object on the basis of expanded data.

Description

  The present invention relates to a recording apparatus and a control method for the recording apparatus.

  2. Description of the Related Art Conventionally, there is known a recording apparatus that stores (internally) font data for use in character recording in a storage medium such as a ROM and records characters based on the stored font data (for example, Patent Document 1). reference). The recording apparatus described in Patent Document 1 compresses font data and stores it in the ROM in order to reduce the capacity of the ROM, and performs a process of reading and expanding from the ROM when recording.

JP 07-137341 A

By the way, since it takes time to decompress the compressed font data, a delay occurs when a large number of characters are continuously recorded. For this reason, for example, a method of reading font data from a ROM in advance and expanding it can be considered. However, in order to store font data of a plurality of characters in an expanded state, it is necessary to secure a sufficient RAM capacity. there were.
The present invention has been made in view of the above-described circumstances, and suppresses the capacity of a storage area for storing font data in a recording apparatus and prevents a delay associated with decompression processing of compressed data. Objective.

In order to achieve the above object, the present invention provides a recording means, a nonvolatile memory storing compressed font data for each character, a character code, and the compressed font data of a character corresponding to each character code. Correspondence information storage means for storing correspondence information that correlates storage addresses stored in the memory, and based on the correspondence information, obtains a storage address of the compressed font data corresponding to the character code of the character to be recorded. Reading the compressed font data in accordance with the acquired storage address and decompressing the compressed font data in a work area, and controlling the recording means based on the data decompressed by the compressed data processing means And a recording control means for recording characters.
According to the present invention, since the font data compressed and stored in the nonvolatile memory is compressed for each character, the font data of the character to be recorded can be read and expanded for each character. For this reason, the data is expanded by the required characters, so that the delay associated with the expansion process can be prevented, and the capacity of the non-volatile memory for storing the compressed font data and the work area for storing the expanded font data can be reduced. it can.

In the recording apparatus, in the nonvolatile memory, font data of a character different from the characters of the compressed font data is stored in an uncompressed state, and the uncompressed data stored in the nonvolatile memory at a predetermined timing is stored. Uncompressed data processing means for reading out font data and storing it in the work area; and determining means for determining whether or not the font data corresponding to the character code of the character to be recorded is the compressed font data. And the compressed data processing means, for each character from the non-volatile memory, when the determining means determines that the font data corresponding to the character code of the character to be recorded is the compressed font data. The compressed font data is read and decompressed, and the recording control means is decompressed by the compressed data processing means. Font data, and it may be configured to perform recording on the basis of the font data of the uncompressed stored in the work area by the uncompressed data processing means has.
According to this configuration, the font data stored in the nonvolatile memory after being compressed and the font data stored in the nonvolatile memory without being compressed are used separately, and the compressed font data is stored in the nonvolatile memory for each character. Since the uncompressed font data is stored in the work area at a predetermined timing, it can be recorded using the font data in the work area. Therefore, by properly using font data that has been compressed according to the frequency and amount of use of font data and non-compressed font data, the capacity of the storage area for storing font data can be effectively suppressed, and data expansion processing can be performed. Can be reliably prevented.

In the recording apparatus, the nonvolatile memory stores font data corresponding to a plurality of different character code sets, the font data corresponding to some of the character code sets is the compressed font data, The font data corresponding to the character code set is the non-compressed font data, and the determination unit specifies the character code set including the character code of the character to be recorded, thereby corresponding to the character code. It may be configured to determine whether font data is stored in the nonvolatile memory as the compressed font data or in the work area as the uncompressed font data.
According to this configuration, for each character code set, compressed font data compressed for each character or non-compressed font data is stored in the nonvolatile memory and can be used properly. For example, a character code having a large number of characters Characters of a character code set having a large data amount such as a set can be stored as compressed font data, and characters of a character code set having a small data amount such as a small number of characters can be stored as non-compressed font data. Therefore, by properly using font data that has been compressed according to the frequency and amount of use of font data and non-compressed font data, the capacity of the storage area for storing font data can be effectively suppressed, and data expansion processing can be performed. Can be reliably prevented. Furthermore, by specifying the character code set based on the character code, it is possible to quickly determine whether the font data to be used is compressed font data or non-compressed font data.

In the recording apparatus, the correspondence information storage unit may store the correspondence information in a part of a storage area of the nonvolatile memory.
According to this configuration, since the correspondence information is stored in a part of the nonvolatile memory storing the compressed font data, the address where the compressed font data is stored can be easily identified and read out quickly.

The recording apparatus includes a memory provided separately from the nonvolatile memory, and the compressed data processing unit copies the compressed font data read from the nonvolatile memory to the work area formed in the memory. And can be configured to extend.
According to this configuration, in a configuration in which a memory other than the nonvolatile memory is used as a work area, a delay associated with the decompression process can be prevented, and the capacity of the nonvolatile memory and the work area can be suppressed.

In order to achieve the above object, the present invention controls a recording device comprising a recording means and a nonvolatile memory storing compressed font data for each character, and character codes of characters that can be recorded, Storage of the compressed font data corresponding to the character code of the character to be recorded based on correspondence information that associates the storage address in the nonvolatile memory in which the compressed font data of the character corresponding to each character code is stored Obtaining an address, reading the compressed font data according to the obtained storage address, decompressing the read compressed font data in a work area, and controlling the recording means based on the decompressed data to record characters. Features.
According to the present invention, since the font data compressed and stored in the nonvolatile memory is compressed for each character, the font data of the character to be recorded can be read and expanded for each character. For this reason, the data is expanded by the required characters, so that the delay associated with the expansion process can be prevented, and the capacity of the non-volatile memory for storing the compressed font data and the work area for storing the expanded font data can be reduced. it can.

  According to the present invention, it is possible to prevent delay associated with decompression processing of compressed font data, and it is possible to suppress the capacity of a nonvolatile memory that stores compressed font data and a work area that stores decompressed font data.

1 is a block diagram illustrating a configuration of a printing system according to an embodiment of the present invention. It is a figure which shows the structure of ROM typically. 3 is a flowchart illustrating an operation of a printer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a printing system 1 according to an embodiment to which the present invention is applied.
A printing system 1 shown in FIG. 1 is a system in which a host computer 10 and a printer 20 (recording apparatus) are connected so as to be able to communicate with each other, and a printed matter is output by the printer 20 based on data output from the host computer 10.
The host computer 10 includes a CPU, a ROM, a RAM, and the like (not shown), and includes a control unit 11 that centrally controls each unit of the host computer 10 by executing a program. The control unit 11 executes the operating system 12, controls each unit of the host computer 10 and the printer 20, and executes the application program 14 on the operating system 12, thereby realizing functions such as document creation and print data management. To do. The application program 14 generates a print job to be printed by the printer 20. This print job includes data such as characters and images to be printed, character and image sizes and layouts (including margins between characters, line feed amount, line feed position, etc.), margin amounts provided at the top, bottom, left and right edges of the printed matter, etc. Including various data for designating data, data for instructing execution of printing, and the like.

The operating system 12 has a printer driver 13 that controls a printer connected to the host computer 10. The printer driver 13 is a program incorporated in the host computer 10. The printer driver 13 analyzes data included in the print job output by the application program 14, and various commands that can be interpreted by the printer, character codes of characters to be printed, Print data such as image data is generated and output to a printer. The printer driver 13 may be prepared according to the specifications of the printer 20 or may be a general-purpose device driver program that is commonly used for various printers.
On the other hand, the printer 20 incorporates font data of characters to be printed as will be described later, and reads and prints font data corresponding to the character code included in the print data output by the printer driver 13.

  In the present embodiment, the application program 14 executed by the host computer 10 can generate a print job in which alphanumeric characters and Chinese characters (simplified characters) are mixed, and a printer driver that forms part of the operating system 12. An example will be described in which print data 13 is generated using ASCII codes for half-width alphanumeric characters and character codes for GB18030 standards.

The host computer 10 is operated by an operator with an interface (I / F) 15 to which an external device such as the printer 20 is connected, a display control unit 16 that displays data generated by the application program 14 on a display screen, and the like. And an input detection unit 17 that detects an operation of an input device such as a keyboard and a mouse. The interface 15 includes connectors and interface circuits compliant with various standards such as USB, RS-232C, and Ethernet (registered trademark), and is connected to a device such as the printer 20 via a cable. On the other hand, the printer 20 includes an interface (I / F) 28 connected to the host computer 10 via a cable. The interface 28 includes a connector and an interface circuit compliant with various standards such as USB, RS-232C, and Ethernet (registered trademark). The interface 15 and the interface 28 may be configured as a wireless communication interface having an antenna or an RF circuit. In this case, the host computer 10 and the printer 20 are connected by a wireless communication line.
In the present embodiment, a configuration in which the host computer 10 and the printer 20 are connected on a one-to-one basis will be described as an example. However, a plurality of printers 20 may be connected to one host computer 10. It is also possible to connect a plurality of host computers 10 to each other.

The printer 20 includes a control unit 21 that centrally controls each unit of the printer 20 by executing a program using a CPU or a microcomputer.
The control unit 21 reads and executes a control program 32 stored in a ROM 31 to be described later, thereby executing a startup control unit 22, a print data acquisition unit 23, a data determination unit 24, a compressed data acquisition unit 25, an expansion processing unit 26, Also, it functions as the print control unit 27.
Connected to the control unit 21 are a ROM 31 (nonvolatile memory) that stores various data and programs in a nonvolatile manner, and a RAM 37 (memory) that forms a work area where the control unit 21 processes data.
Further, the printer 20 includes a printing unit 41 (recording unit) that executes printing under the control of the control unit 21. The printing unit 41 includes a conveyance motor 42 that conveys paper or a sheet as a recording medium, a print head 43 that prints characters and images on a recording medium that is conveyed by the conveyance motor 42, and a recording medium that is printed by the print head 43. And a cutter unit 44 for cutting. In this embodiment, as an example, the thermal roll paper can be set inside or outside the housing of the printer 20, and the print head 43 is a thermal head that performs printing by applying heat to the thermal roll paper. .

The ROM 31 is configured by a rewritable nonvolatile storage element such as an EEPROM or a flash ROM. The ROM 31 stores a control program 32 executed by the control unit 21. The ROM 31 has a compressed data storage area 33 and a non-compressed data storage area 34 for storing font data of characters to be printed by the printing unit 41. The compressed data storage area 33 stores compressed font data, and the non-compressed data storage area 34 stores font data in an uncompressed state. The ROM 31 corresponds to correspondence information storage means for storing the compressed data index 35 (correspondence information).
The RAM 37 is composed of semiconductor memory elements including DRAM, SDRAM, RDRAM, FeRAM, MRAM and the like, and forms a work area where the control unit 21 processes data. In the work area formed in the RAM 37, a non-compressed font data stored in the non-compressed font data stored in the font expansion area 38 and the non-compressed data storage area 34 in which the control unit 21 expands the compressed font data. A compressed data storage area 39 is provided.

FIG. 2 is a diagram schematically illustrating the configuration of the ROM 31, (A) is a schematic diagram illustrating the configuration of a storage area in the ROM 31, and (B) is a schematic diagram of the compressed data index 35.
As shown in FIG. 2A, the font data 31A of characters printable by the printer 20 is stored in the compressed data storage area 33 in a compressed state. The font data 31A is data for the printing unit 41 to form characters on the roll paper. For example, the font data 31A is bitmap data of a bitmap font or data of an outline font. The font data 31A is stored in the compressed data storage area 33 in a form compressed in character units, and the font data 31A can be read and expanded for each character. For example, in the present embodiment, the printer 20 can print characters conforming to the GB18030 standard. Therefore, the font data 31A of necessary characters among a large number of characters included in the GB18030 is stored in the compressed data storage area 33 in units of one character. Can be read. The control unit 21 reads the font data 31A of necessary characters from a large number of font data 31A stored in the compressed data storage area 33, and copies it to the font expansion area 38 provided in the RAM 37 as shown in FIG. Then, expansion and rasterization are performed. Thus, the font data 31A is converted into font data 31B in a form that can be printed by the printing unit 41.

  On the other hand, the uncompressed data storage area 34 stores an uncompressed state, that is, uncompressed font data 34A. The printer 20 of the present embodiment can print ASCII code characters in addition to the above GB18030 code characters. As for the font data of ASCII code characters, neither the bitmap font nor the outline font has a large amount of data compared to kanji. Therefore, the ASCII font character font data 34A is stored in the uncompressed data storage area 34 in a printable state without being compressed. The font data 34A stored in the non-compressed data storage area 34 is read by the control unit 21 when the printer 20 is activated, and is stored in the non-compressed data storage area 39 provided in the RAM 37 as shown in FIG. Copied. The font data 34A is in a form that can be printed by the printing unit 41.

  The compressed data index 35 is data that associates a character code with an address (storage address) in the compressed data storage area 33 for font data 31A of each character that is compressed and stored in the compressed data storage area 33. The compressed data index 35 includes data indicating the head address and data size of the area where the font data 31A is stored in the compressed data storage area 33 as data indicating the address. The compressed data index 35 includes data corresponding to the font data 31 A of all characters stored in the compressed data storage area 33. Therefore, the font data 31 A of the character can be read for each character according to the compressed data index 35 for all characters for which the font data 31 A is stored in the compressed data storage area 33.

As illustrated in FIG. 1, the activation control unit 22 (uncompressed data processing unit) included in the control unit 21 executes a series of activation processes that initialize each unit of the printer 20 when the printer 20 is activated. In this startup process, the startup control unit 22 clears the data in the RAM 37, initializes the mechanical part of the printing unit 41, various sensors, and the like. Further, the activation control unit 22 reads the font data 34 </ b> A (FIG. 2A) stored in the uncompressed data storage area 34 of the ROM 31 and copies it to the uncompressed data storage area 39. As a result, the ASCII code characters are ready for printing.
The print data acquisition unit 23 acquires input data such as a print command, print data, and other control commands transmitted from the host computer 10 via the interface 28.
The data determination unit 24 (determination means) extracts the character code included in the print data acquired by the print data acquisition unit 23, and the font data of the character corresponding to each character code is stored in the compressed data storage area 33. Whether the font data is compressed font data or the font data 34 A stored in the RAM 37 is determined. The data determination unit 24 specifies which character code set includes the character code extracted from the print data. In the present embodiment, the data determination unit 24 specifies whether the character code included in the print data is an ASCII code or a GB18030 code. When the extracted character code is an ASCII code, the data determination unit 24 determines that the data used for printing is the font data 34A copied to the uncompressed data storage area 39, and the data is a GB18030 code. Determines that the data used to execute printing is the font data 31 A stored in the compressed data storage area 33.

When the data determination unit 24 determines that the font data 31A stored in the compressed data storage area 33 is to be used, the compressed data acquisition unit 25 refers to the compressed data index 35 based on the determined character code. The compressed data acquisition unit 25 reads the font data 31A of the corresponding character from the compressed data storage area 33 according to the head address and data size associated with the character code in the compressed data index 35, and copies them to the font expansion area 38. .
The expansion processing unit 26 performs a process of expanding the font data 31A copied to the font expansion area 38 by the compressed data acquisition unit 25 according to a predetermined algorithm.
These compressed data acquisition unit 25 and decompression processing unit 26 correspond to the compressed data processing means of the present invention.

  The print control unit 27 (recording control unit) executes printing by controlling the print unit 41 based on the print command and print data acquired by the print data acquisition unit 23. Here, the print control unit 27 reads out the font data 31B expanded in the font expansion area 38 or the font data 34A stored in the uncompressed data storage area 39 as the font data of the characters included in the print data. Then, printing is performed by the print head 43. Note that the print control unit 27 may form a print image of a page to be printed in a print buffer provided in the RAM 37, and print this print image by the print head 43. In this case, the font expansion region 38 or the non-printing area may be printed. A print image is generated by arranging font data acquired from the compressed data storage area 39 in accordance with a print command.

FIG. 3 is a flowchart showing the operation of the printer 20.
When the power switch of the printer 20 is turned on, the startup control unit 22 executes startup processing (step S11), and initializes each unit of the printer 20. Subsequently, the activation control unit 22 copies and stores the font data 34A stored in the ROM 31 in the uncompressed data storage area 39 of the RAM 37 (step S12).
Thereafter, the control unit 21 waits for input of a print command and print data transmitted from the host computer 10 and receives the print command and print data (step S13), and the print data acquisition unit 23 receives the print command and print data. The data determination unit 24 extracts the character code string from the acquired print data (step S14). Here, the number of characters constituting the character code string extracted by the data determination unit 24 from the print data is not limited, and may be one character.

  The data determination unit 24 acquires a character code for one character from the extracted character code string (step S15), and specifies a character code set of the acquired character code (step S15). In the example of the present embodiment, the data determination unit 24 specifies whether the acquired character code is an ASCII code or a GB18030 code. Based on whether the specified character code set is the ASCII code or the GB18030 code, the data determining unit 24 determines whether the font data of the printer 20 corresponding to the character code is the font data 31A or the font data 34A (step S17). ).

When the data determination unit 24 determines that the font data used for printing is the compressed font data 31A stored in the compressed data storage area 33 (step S17; Yes), the compressed data acquisition unit 25 Based on the character code, the compressed data index 35 is referred to, and the font data 31A for one character is read from the compressed data storage area 33 and copied to the font expansion area 38 (step S18). Next, the decompression processing unit 26 performs a process of decompressing and rasterizing the font data 31A copied to the font decompression area 38, thereby generating font data 31B (step S19).
Thereafter, the print control unit 27 acquires the processed font data 31B from the font expansion area 38, stores it in the print buffer provided in the work area of the RAM 37, and prints the characters by the print unit 41 according to the print command ( Step S21).
The control unit 21 determines whether or not the processing has been completed for all character codes in the character code string extracted from the print data by the data determination unit 24 (step S22). If the processing is completed (step S22; Yes), this process ends. If there is an unprocessed character code (step S22; No), the process returns to step S15 to process the next character code.

  On the other hand, when the data determination unit 24 determines that the font data used for printing is the non-compressed font data 34A stored in the non-compressed data storage area 39 (step S17; No), the print control unit 27. Acquires the font data of the corresponding character from the font data 34A in the uncompressed data storage area 39 (step S23), moves to step S20, and stores the acquired font data in the print buffer.

  As described above, the printer 20 according to the embodiment to which the present invention is applied includes the printing unit 41 and the ROM 31 having the compressed data storage area 33 in which the font data 31A is stored for each character. The compressed data index 35 for associating the character code with the font data 31A of the character corresponding to each character code and the storage address stored in the ROM 31 is stored. Based on the compressed data index 35, the character code of the character to be printed is stored. The compressed data acquisition unit 25 that acquires the storage address of the font data 31A corresponding to the font data 31A and reads the font data 31A according to the acquired storage address, and the expansion that expands the font data 31A acquired by the compressed data acquisition unit 25 in the font expansion area 38 By the processing unit 26 and the decompression processing unit 26 Based Zhang data, and a print control unit 27 to record the character to be recorded by controlling the printing unit 41. According to this printer 20, since the font data compressed and stored is compressed for each character and stored in the ROM 31, the font data of the character to be recorded can be read and expanded for each character. For this reason, since the data is expanded by the necessary characters, the delay associated with the expansion process can be prevented, and the ROM 31 for storing the font data 31A and the capacity of the font expansion area 38 for storing the expanded font data 31B can be suppressed. Can do.

  In addition, in the non-compressed data storage area 34 of the ROM 31, font data 34A of a character different from the character of the font data 31A is stored in an uncompressed state, and the printer 20 reads the ROM 31 at a predetermined timing, for example, when the printer 20 starts. The non-compressed font data 34A stored in the image data is read and copied into the font expansion area 38 and stored therein, and the font data corresponding to the character code of the character to be printed is stored in the compressed data storage area 33. A data determination unit 24 that determines whether the font data 31A has been stored or the font data 34A stored in an uncompressed state in the non-compressed data storage area 34. The compressed data acquisition unit 25 includes a data determination unit 24. The font data corresponding to the character code of the character to be printed is When it is determined that the font data 31A is read from the ROM 31 for each character, the print control unit 27 decompresses the font data 31B and the expansion control unit 22 according to the determination of the data determination unit 24. Printing is performed based on the non-compressed font data 34A stored in the area 38. Thereby, the printer 20 can use the font data 31A compressed and stored in the ROM 31 and the font data 34A stored in the ROM 31 without compression. Specifically, the font data 31A is read from the ROM 31 for each character, decompressed and recorded, and the uncompressed font data 34A is stored in the font decompression area 38 at a predetermined timing and used for printing. Accordingly, it is possible to appropriately select whether the data is compressed and stored in the ROM 31 or uncompressed and stored in the RAM 37 according to the frequency and amount of use of the font data, and the capacity of the storage areas of the ROM 31 and the RAM 37 for storing the font data. Can be effectively suppressed, and delays associated with font data expansion processing can be prevented.

  The ROM 31 stores font data corresponding to a plurality of different character code sets, and the font data corresponding to the GB 18030 code, which is a part of the character code set, is compressed and stored as the font data 31A. Font data corresponding to the ASCII code which is a character code set is stored in the ROM 31 as non-compressed font data 34A. Then, the data determination unit 24 specifies the character code set including the character code for the character code of the character to be printed included in the print data, so that the font data corresponding to the character code is the ROM 31 as the font data 31A. Stored in the font expansion area 38 as uncompressed font data 34A. Therefore, the compressed font data 31A and the uncompressed font data 34A can be used properly for each character code set. For example, a character code set character having a large number of characters and a large amount of data such as GB18030 code is compressed and stored in the ROM 31, and a character code set character having a small number of characters and a small data amount such as ASCII code is not compressed. The font data 34A may be stored in the ROM 31. Therefore, by appropriately using compression / non-compression according to the frequency and amount of use of font data, the capacity of the storage area of the ROM 31 and RAM 37 for storing font data is effectively suppressed, and the data expansion process is accompanied. A delay can be surely prevented. Furthermore, by specifying the character code set based on the character code, it is possible to quickly determine whether the font data to be used is the font data 31A or the font data 34A.

  Furthermore, since the compressed data index 35 is stored in the ROM 31, the address where the font data 31A is stored can be easily specified by the compressed data acquisition unit 25 and can be quickly read out. Furthermore, since the font data 31A read from the compressed data storage area 33 is copied and expanded in the font expansion area 38 formed in the RAM 37 provided separately from the ROM 31, a delay associated with the expansion process can be prevented. .

In addition, the said embodiment shows the one aspect | mode which applied this invention, Comprising: This invention is not limited. For example, in the above-described embodiment, the printer 20 has been described by taking as an example a configuration capable of printing GB18030 code simplified characters and ASCII code alphanumeric characters. However, the printer 20 can be adapted to other character code sets. The font data of a plurality of character code sets may be compressed and stored in the compressed data storage area 33. The font data of a plurality of character code sets may be stored in the uncompressed data storage area 34 in an uncompressed state. Also good. The timing of copying the uncompressed font data 34A stored in the uncompressed data storage area 34 to the RAM 37 is not limited to when the printer 20 is activated. For example, when the printer 20 returns from the sleep state, the host computer 10 After the printer 20 resets in response to the reset command to be transmitted, the host computer 10 transmits a command for instructing reading of font data to the printer 20 and is performed when the printer 20 receives this command. May be.
In the above-described embodiment, the configuration including the printing unit 41 that prints on the thermal roll paper using the thermal head has been described as an example. However, the present invention is not limited to this, and the printing unit 41 may be an inkjet. It may be a type printer, a dot impact type printer, a laser printer, or other various printers. Furthermore, each functional block shown in FIG. 1 can be arbitrarily realized by cooperation of hardware and software, and does not suggest a specific hardware configuration. Furthermore, the control part 11 and the control part 21 are good also as a structure which performs various operation | movement including the operation | movement which concerns on the flowchart of FIG. 3 by running the program memorize | stored in the storage medium connected externally.

  DESCRIPTION OF SYMBOLS 20 ... Printer (data processing apparatus, recording device), 21 ... Control part, 22 ... Start-up control part (uncompressed data processing means), 23 ... Print data acquisition part, 24 ... Data determination part (determination means), 25 ... Compression Data acquisition unit (compressed data processing means), 26 ... decompression processing unit (compressed data processing means), 27 ... print control unit (recording control means), 31 ... ROM (nonvolatile memory, correspondence information storage means), 31A ... font Data (compressed font data), 31B ... font data, 33 ... compressed data storage area, 34 ... uncompressed data storage area, 34A ... font data (uncompressed font data), 35 ... compressed data index (corresponding information), 37 ... RAM (memory), 38 ... font expansion area (work area), 39 ... uncompressed data storage area (work area), 41 ... printing Knit (recording means).

Claims (6)

Recording means;
Non-volatile memory that stores compressed font data for each character;
Correspondence information storage means for storing correspondence information that correlates a character code and a storage address in which the compressed font data of the character corresponding to each character code is stored in the nonvolatile memory;
Based on the correspondence information, a compressed data processing unit that acquires a storage address of the compressed font data corresponding to a character code of a character to be recorded, reads the compressed font data according to the acquired storage address, and decompresses the compressed font data in a work area When,
Recording control means for controlling the recording means based on the data decompressed by the compressed data processing means to record the character to be recorded;
A recording apparatus comprising: The recording apparatus according to claim 1,
In the nonvolatile memory, font data of characters different from the characters of the compressed font data is stored in an uncompressed state,
Uncompressed data processing means for reading out the uncompressed font data stored in the nonvolatile memory at a predetermined timing and storing it in the work area;
Determining means for determining whether font data corresponding to a character code of the character to be recorded is the compressed font data;
The compressed data processing means, when the determining means determines that the font data corresponding to the character code of the character to be recorded is the compressed font data, the compressed font for each character from the nonvolatile memory. Read and decompress the data,
The recording control unit performs recording based on font data expanded by the compressed data processing unit and non-compressed font data stored in the work area by the non-compressed data processing unit. Recording device. The recording apparatus according to claim 2,
The nonvolatile memory stores font data corresponding to a plurality of different character code sets, the font data corresponding to some of the character code sets is the compressed font data, and some of the character code sets The font data corresponding to is the uncompressed font data,
The determination unit specifies a character code set including a character code of a character to be recorded, so that font data corresponding to the character code is stored in the nonvolatile memory as the compressed font data or the non-compressed It is determined whether the font data is stored in the work area. The recording apparatus according to any one of claims 1 to 3,
The recording apparatus according to claim 1, wherein the correspondence information storage means stores the correspondence information in a part of a storage area of the nonvolatile memory. The recording apparatus according to any one of claims 1 to 4,
A memory provided separately from the non-volatile memory,
The recording apparatus, wherein the compressed data processing means copies and decompresses the compressed font data read from the nonvolatile memory into the work area formed in the memory. Controlling a recording device comprising a recording means and a non-volatile memory storing compressed font data for each character;
The character code of the character to be recorded based on the correspondence information that associates the character code of the recordable character with the storage address in the nonvolatile memory in which the compressed font data of the character corresponding to each character code is stored A storage address of the compressed font data corresponding to
Read the compressed font data according to the obtained storage address,
Decompress the read compressed font data in the work area,
Controlling the recording means based on the decompressed data to record characters;
A control method for a recording apparatus.

Images