JP2002032328A - Device and method for transferring data, recorder and recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable efficient data transfer by taking the balance between data preparation time and transfer time into consideration. SOLUTION: In this method of data transfer, at a step S401, 16 kB×8 pieces of data are prepared; at a step S402, it is confirmed that transfer from a transfer buffer is finished, to change the division buffer size from 16 kB to 32 kB and that free space for >=16 kB×2 is generated, and in step S403, preparation of data for 32 kB is started; at a step S404, this is repeated until 32 kB×4 pieces of data are prepared. In a step S405, it is confirmed that free space for >=32 kB×2 is generated to change division sizes from 32 kB to 64 kB; at a step S406, data for 64 kB are prepared; and at a step S407, this is repeated until 64 kB×2 pieces of data are prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a data transfer device,
The present invention relates to a data transfer method, a recording device, and a recording method.

[0002]

2. Description of the Related Art Conventionally, when transferring a large amount of data such as image data, first, created data is stored in a buffer having a fixed capacity, and the data stored in this buffer is transferred. Also, by providing a plurality of buffers,
While one buffer is performing transfer processing, another buffer can hold the created data.

[0003]

If the area size of the buffer is increased, a large amount of data can be transferred at the time of transfer, which is efficient.

However, there is an inconvenience that the processing time until data is created becomes longer and the receiving side of the transfer is made to wait. If the area size of the buffer is small, it takes less time to create data, but the number of transfer processes increases, resulting in a decrease in processing efficiency. For this reason, the balance between the data creation time and the transfer time is important, and this balance differs depending on the capacity of the receiving side and the communication capacity for transfer. Then, there is a problem that it becomes inappropriate.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a data transfer apparatus and a data transfer method which enable efficient data transfer in consideration of a balance between data creation time and transfer time. , A recording device, and a recording method.

[0006]

In order to solve the above-mentioned problems and achieve the object, a data transfer apparatus according to the present invention comprises: a data creating means for creating transfer data to be transferred to a receiving side; Holding means for holding the created data, and dividing the data holding area of the holding means into a plurality of areas, while changing the size of each of the divided areas,
The image processing apparatus further includes a changing unit that causes the holding unit to hold the created data, and a transfer unit that transfers the data held by the holding unit to a receiving side.

According to the data transfer method of the present invention, transfer data to be transferred to a receiving side is created, an area for holding the created data is divided into a plurality of areas, and the size of each of the divided areas is changed. Then, the created data is held, and the held data is transferred to the receiving side.

[0008] Also, the recording apparatus of the present invention comprises a data creating means for creating the recording data to be transferred to the receiving side, a holding means for holding the recording data created by the data creating means, Transfer means for transferring the held recording data to a receiving side; changing means for dividing a data holding area of the holding means into a plurality of areas; and changing the size of each of the divided areas; Recording means for recording data on a recording medium by a recording head.

Further, according to the recording method of the present invention, recording data to be transferred to a receiving side is created, an area for holding the created recording data is divided into a plurality of areas, and the size of each of the divided areas is changed. While holding the generated recording data, the stored recording data is transferred to the receiving side, and the transferred recording data is recorded on a recording medium by a recording head.

Further, a computer readable storage medium storing a program code for performing the data transfer processing of the present invention is provided with data creating means for creating transfer data to be transferred to a receiving side, and data created by the data creating means. Computer-readable storage in which a program code for performing a data transfer process is stored in a data transfer device including a holding unit for holding the data stored therein and a transfer unit for transferring the data held by the holding unit to a receiving side. The medium has program code for dividing a data holding area of the holding unit into a plurality of areas and changing the size of each of the divided areas.

Further, in the recording apparatus of the present invention, the computer readable storage medium storing the program code for performing the data transfer processing includes: a data creating means for creating the recording data to be transferred to the receiving side; Holding means for holding the recording data created in the above, transfer means for transferring the recording data held by the holding means to a receiving side, and recording for recording the transferred recording data on a recording medium by a recording head Means for storing a program code for performing a data transfer process on a computer readable storage medium, wherein a data holding area of the holding means is divided into a plurality of areas, and each of the divided It has a program code for changing the area size.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

The embodiment described below is an example as a means for realizing the present invention, and the present invention can be applied to a modification or modification of the following embodiment without departing from the gist thereof. . [First Embodiment] FIG. 1 is a diagram showing a state where a transfer buffer area is divided.

As shown in FIG. 1, when a capacity of 128 KB is secured as the transfer buffer area,
When divided in units of B, four buffer areas 101 to
104 can be secured. For this buffer area, first, transfer data is created using the area 101, and 32
After creating data for KB, data is created in the next buffer 102 area. Since the transfer data has already been prepared in the area 101, the transfer processing can be started, and at the same time, the data can be created in the area 102. By repeating this process, data transfer can be performed.

FIG. 2 shows a transfer buffer area at the start of data transfer.

The transfer size is smaller than the transfer size shown in FIG.
B) When a buffer is secured by capacity, as shown in FIG.
Eight buffer areas from 01 to 208 can be secured. In this case, the time for creating the data in the buffer 201 can be reduced, and the time for starting the transfer processing can be reduced.

FIG. 3 is a diagram in which the number of divisions of the buffer size is changed during data transfer.

As shown in FIG. 3, by changing the size of dividing the same 128 KB area, 16 KB × 8
Book (301-308), 32 KB x 4 book (309-31)
2) It is possible to change the buffer configuration to 64 KB × 2 lines (313 to 314).

FIG. 4 is a flowchart showing a procedure for changing the number of divided buffer sizes during data transfer.

As shown in FIG. 4, first, at step S40
1 creates data of 16 KB × 8 lines. Next, in step S402, it is confirmed that the transfer to the transfer buffer is completed in order to change the divided buffer size from 16 KB to 32 KB, and that there is a free space of 16 KB × 2 or more in the buffer. Start creating minute data. In step S404, step S40
2. The procedure of S403 is repeated until data of 32 KB × 4 lines is created.

Next, in step S405, 32 KB → 6
In order to change the division size to 4 KB, it is confirmed that there is a space of 32 KB × 2 or more, and step S 4
In step 06, 64 KB of data is created. Step S4
In step 07, the procedure of steps S405 and S406 is changed to 64K.
Repeat for B × 2. Thereafter, steps S408 to S4
In step 10, the size of 64 KB is fixed, and data transfer is repeated until all transfer data is created.

FIG. 5 is a diagram showing a comparison between the case (a) in which the buffer division size is made variable and the case (b) in which the buffer division size is fixed.

As shown in FIG. 5A, the data creation time 501 for 16 KB varies depending on the environment in which the data is created. For example, if it takes a data creation time of the length of the arrow shown in FIG. The receiving side can start receiving data from the time point 505 when the creation of 16 KB data is completed. By repeating reception in this way, 1
The data transfer processing time 502 corresponding to 6 KB is represented by an arrow in the drawing, and the data transfer processing time corresponding to 64 KB can be represented by a position 506.

When this is compared with the case where transfer is performed with a buffer configuration of 64 KB × 2 lines, as shown in FIG. 5B, the data creation time 503 of 64 KB takes the length of the arrow shown in FIG. The side can start data reception from the position 507 after the data of one day is created. In this case, the time until the reception of the 64 KB data is the position 508, and when comparing the cases of FIGS. 5A and 5B, a time difference 509 occurs as a difference between the data transfer processing times 508 and 506. Therefore, it is more advantageous to start transmission with a small buffer capacity at the start of transfer. [Second Embodiment] FIG. 6 is a flowchart showing a procedure for determining a buffer division size by confirming a free space in a buffer.

As shown in FIG. 6, first, at step S60
1 creates data of 16 KB × 8 lines. Next, in step S602, the state of empty buffers at this point is confirmed. At this time, if there is little empty space in the buffer (YES in step S602), the data creation time is shorter than the data transfer processing time, and the data transfer process takes a long time. Waiting for a free space of more than one minute, the transfer data size created at one time in step S606 is increased to 32 KB, and the data creation time is increased to balance the creation time and the transfer time. In addition, since the unit of one transfer increases and the number of transfers decreases, the load of the transfer process can be reduced. Also, for the data creation area,
Compared to creating a large number of data with a small size, you can have a certain amount of free time,
It is also possible to dedicate time to other processing and the like.

If there is a lot of free space in the buffer in S602,
(NO in step S602), since it is determined that the data creation time ≧ the transfer processing time, the current buffer is used to shorten the time until the next data transfer when the buffer becomes available in step S603. Data is created while maintaining the division unit (S604).

Next, in step S607, 32 KB × 4
When the creation of the transfer data for the main is completed, step S
In step 608, as in step S602, the state of the buffer at this point is checked. At this time, if the empty space in the buffer is small (YES in step S608), the data creation time is shorter than the data transfer processing time, and the data transfer process takes a long time. Waiting for a free space of more than one minute, the transfer data size created at one time in step S612 is increased to 64 KB, and the data creation time is increased to balance the creation time and the transfer time.

On the other hand, if there is a lot of free space in the buffer in step S608 (NO in step S608), it is determined that data creation time ≧ transfer processing time. In order to shorten the time until the next data transfer, data is created while maintaining the current buffer division unit (S610).

Similarly, at step S613, 64 KB ×
When the creation of the two transfer data has been completed, the process is repeated until all the transfer data of 64 KB has been created in step S614.
KB transfer data is created and data transfer is performed (steps S615 and S616).

In the following, similarly, when it is determined that the data creation time <the data transfer processing time, the buffer division size is increased, and when the data creation time ≧ the data transfer processing time, the transfer is performed while maintaining the current state. .

Although not particularly shown as a procedure,
If the state of data creation time ≥ data transfer processing time does not improve, such as when the transfer is temporarily delayed due to communication reasons and then improved and then returned, reduce the temporarily increased transfer size (for example, 64 KB). → 32KB), it is possible to improve.

As an application example of the above-described embodiment, for example, the present invention can be applied to a buffer that holds a recording signal to be supplied to a recording head in a printer, or creates and transfers a recording signal sent from a computer terminal device or the like to a printer. .

The outline of the printer will be described below. [Schematic Description of Apparatus Main Body] FIG. 7 is an external perspective view showing an outline of the configuration of an ink jet printer IJRA which is a typical embodiment of the present invention.

Referring to FIG. 7, a spiral groove 500 of a lead screw 5005 which rotates via driving force transmission gears 5011 and 5009 in conjunction with forward and reverse rotation of a driving motor 5013.
The carriage HC engaged with the carriage 4 has a pin (not shown) and is reciprocated in the directions of arrows a and b. An ink jet cartridge IJC is mounted on the carriage HC. Reference numeral 5002 denotes a paper pressing plate, which presses the paper against the platen 5000 in the moving direction of the carriage. Reference numerals 5007 and 5008 denote home position detecting means for confirming the presence of the lever 5006 of the carriage in this area and switching the rotation direction of the motor 5013. A member 5016 supports a cap member 5022 for capping the front surface of the recording head.
Reference numeral 5015 denotes a suction unit that suctions the inside of the cap, and performs suction recovery of the recording head through the opening 5023 in the cap. Reference numeral 5017 denotes a cleaning blade. Reference numeral 5019 denotes a member which allows the blade to move in the front-rear direction. These members are supported by a main body support plate 5018. It goes without saying that the blade is not limited to this form and a known cleaning blade can be applied to this example. Also, 5012 is
The lever for starting suction for suction recovery moves with the movement of the cam 5020 that engages with the carriage, and the driving force from the drive motor is controlled by known transmission means such as clutch switching.

The capping, cleaning, and suction recovery are configured so that desired operations can be performed at the corresponding positions by the action of the lead screw 5005 when the carriage comes to the area on the home position side. If a desired operation is performed at a timing, any of the examples can be applied. [Description of Control Configuration] Next, a control configuration for executing the recording control of the above-described apparatus will be described. FIG. 8 is a block diagram showing a configuration of a control circuit of the inkjet printer IJRA.

In the figure showing a control circuit, 1700 is an interface for inputting a recording signal, and 1701 is an MP
Reference numerals U and 1702 denote program ROMs for storing control programs executed by the MPU 1701, and 1703 denotes a dynamic RAM for storing various data (such as the recording signals and recording data supplied to the head). 1704
A gate array for controlling supply of print data to the print head 1708;
Data transfer between the PU 1701 and the RAM 1703 is also controlled. Reference numeral 1710 denotes a carrier motor for transporting the recording head 1708, and reference numeral 1709 denotes a transport motor for transporting the recording paper. Reference numeral 1705 denotes a head driver for driving the head, and 1706 and 1707 denote transport motors 170, respectively.
9. A motor driver for driving the carrier motor 1710.

The operation of the above control configuration will be described. When a recording signal enters the interface 1700, the gate array 17
04 and the MPU 1701 converts the recording signal into recording data for printing. Then, the motor driver 17
06 and 1707 are driven, and the head driver 1
The recording head is driven according to the recording data sent to 705, and printing is performed.

In the above embodiment, the description has been made assuming that the droplets ejected from the recording head are ink, and that the liquid stored in the ink tank is ink. It is not limited. For example, an ink tank may contain a processing liquid discharged to a recording medium in order to improve the fixability and water resistance of the recorded image or to improve the image quality.

The above-described embodiment is particularly provided with a means (for example, an electrothermal converter or a laser beam) for generating thermal energy as energy used for performing ink ejection even in an ink jet recording system. By using a method in which a change in the state of the ink is caused by energy, higher density and higher definition of recording can be achieved.

The typical configuration and principle are described in, for example, US Pat. Nos. 4,723,129 and 4,740.
It is preferable to use the basic principle disclosed in the specification of Japanese Patent No. 796. This method can be applied to both the so-called on-demand type and continuous type. In particular, in the case of the on-demand type, liquid (ink)
By applying at least one drive signal corresponding to the recorded information and providing a rapid temperature rise exceeding the nucleate boiling to an electrothermal transducer arranged corresponding to the sheet or the liquid path holding the Since thermal energy is generated in the electrothermal transducer and film boiling occurs on the heat-acting surface of the recording head, bubbles in the liquid (ink) corresponding to this drive signal on a one-to-one basis can be formed. It is valid. By discharging the liquid (ink) through the discharge opening by the growth and contraction of the bubble, at least one droplet is formed. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that the ejection of the liquid (ink) having particularly excellent responsiveness can be achieved, which is more preferable.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 relating to the temperature rise rate of the heat acting surface are adopted, more excellent recording can be performed.

As the configuration of the recording head, in addition to the combination of a discharge port, a liquid path, and an electrothermal converter (a linear liquid flow path or a right-angled liquid flow path) as disclosed in the above-mentioned respective specifications, A configuration using U.S. Pat. No. 4,558,333 or U.S. Pat. No. 4,459,600, which discloses a configuration in which a heat acting surface is arranged in a bent region, is also included in the present invention. In addition, for multiple electrothermal transducers,
JP-A-59-123670 which discloses a configuration in which a common slot is used as a discharge part of an electrothermal transducer, and JP-A-59-123670 which discloses a configuration in which an opening for absorbing a pressure wave of thermal energy corresponds to a discharge part. A configuration based on 138461 may be adopted.

Further, as a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus, the length is determined by combining a plurality of recording heads as disclosed in the above-mentioned specification. This may be either a configuration satisfying the above requirements or a configuration as a single recording head formed integrally.

In addition, not only the recording head of the cartridge type in which the ink tank is provided integrally with the recording head itself described in the above-described embodiment but also the main body of the apparatus can be electrically connected to the main body of the apparatus. A replaceable chip-type recording head, which enables a simple connection and supply of ink from the apparatus main body, may be used.

It is preferable to add recovery means for the printhead, preliminary auxiliary means, and the like to the configuration of the printing apparatus described above, since the printing operation can be further stabilized. Specific examples thereof include capping means for the recording head, cleaning means, pressurizing or suction means, preheating means using an electrothermal transducer or another heating element or a combination thereof. It is also effective to provide a preliminary ejection mode for performing ejection that is different from printing, in order to perform stable printing.

Further, the recording mode of the recording apparatus is not limited to a recording mode of only a mainstream color such as black, but may be a recording head integrally formed or a combination of a plurality of recording heads. Alternatively, the apparatus may be provided with at least one of full colors by color mixture.

In the embodiments described above, the description is made on the assumption that the ink is a liquid. However, even if the ink solidifies at room temperature or lower, it is possible to use an ink that softens or liquefies at room temperature. Or, in the ink jet method, generally, the temperature of the ink itself is controlled within a range of 30 ° C. or more and 70 ° C. or less to control the temperature so that the viscosity of the ink is in a stable ejection range.
It is sufficient that the ink is in a liquid state when the use recording signal is applied.

In addition, in order to positively prevent the temperature rise due to thermal energy as energy for changing the state of the ink from the solid state to the liquid state,
Alternatively, in order to prevent evaporation of the ink, an ink which solidifies in a standing state and liquefies by heating may be used. In any case, the application of heat energy causes the ink to be liquefied by application of the heat energy according to the recording signal and the liquid ink to be ejected, or to start to solidify when reaching the recording medium. The present invention is also applicable to a case where an ink having a property of liquefying for the first time is used. In such a case, as described in JP-A-54-56847 or JP-A-60-71260, the ink is held in a liquid state or a solid state in the concave portion or through hole of the porous sheet. It is good also as a form which opposes an electrothermal transducer. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition to the above, the recording apparatus according to the present invention may be provided not only as an image output terminal of an information processing apparatus such as a computer but also integrally or separately, a copying apparatus combined with a reader, etc. It may take the form of a facsimile machine having functions.

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), an apparatus (for example, a copying machine) Machine, facsimile machine, etc.).

Further, an object of the present invention is to supply a storage medium (or a recording medium) in which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or an apparatus, and a computer (a computer) of the system or the apparatus. Or a CPU or MPU) reads out and executes the program code stored in the storage medium,
Needless to say, this is achieved. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.
In addition, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also based on the instructions of the program code,
The operating system (OS) running on the computer performs part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

Further, after the program code read from the storage medium is written into the memory provided in the function expansion card inserted into the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the program code. , The CPU provided in the function expansion card or the function expansion unit performs part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

When the present invention is applied to the storage medium, the storage medium stores program codes corresponding to the above-described flowcharts (shown in FIG. 4 and / or FIG. 6).

[0053]

As described above, claims 1 and 4,
According to the inventions of 7, 12, and 17, transfer data to be transferred to the receiving side is created, a holding area for the created data is divided into a plurality of areas, and the size of each of the divided areas is changed. By holding the created data and transferring the held data to the receiving side, efficient data transfer can be performed in consideration of the balance between the data creation time and the transfer time.

According to the second, fifth, thirteenth, and eighteenth aspects of the present invention, when the transfer of the transfer data is started, the area size is set small, and the area size is gradually increased as the transfer proceeds. , The area size is automatically increased as the transfer progresses, and the transfer efficiency can be improved regardless of the state of the receiving side.

According to the third, sixth, fourteenth, and nineteenth aspects of the present invention, at the start of transfer of transfer data, the area size is set small, and the area size is determined while determining the free state of the data holding area. Since the time until the start of transfer of transfer data is shortened, and then the area size is automatically adjusted according to the transfer status, the transfer efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a transfer buffer area is divided.

FIG. 2 is a diagram illustrating a transfer buffer area at the start of data transfer.

FIG. 3 is a diagram in which the number of divisions of a buffer size is changed during data transfer.

FIG. 4 is a flowchart showing a procedure for changing the buffer size division number during data transfer.

FIG. 5 shows a case where a buffer division size is variable (a).
It is a figure which compares and shows the case (b) fixed.

FIG. 6 is a flowchart illustrating a procedure for determining a buffer division size while confirming a free space in the buffer;

FIG. 7 is an external perspective view illustrating an outline of a configuration of an ink jet printer IJRA according to a typical embodiment of the present invention.

FIG. 8 is a block diagram illustrating a configuration of a control circuit of the inkjet printer IJRA.

Claims (20)

[Claims] A data generating unit for generating transfer data to be transferred to a receiving side; a holding unit for holding data generated by the data generating unit; and a data holding area of the holding unit divided into a plurality of areas. And
A change unit for holding the created data in the holding unit while changing the size of each of the divided areas, and a transfer unit for transferring the data held in the holding unit to a receiving side. A data transfer device, characterized in that: 2. The data according to claim 1, wherein at the start of data transfer by said transfer means, said area size is set small, and said area size is gradually increased as transfer by said transfer means progresses. Transfer device. 3. The data transfer method according to claim 1, wherein the data size is set to a small size when the data transfer is started by the transfer means, and the area size is determined while judging a free state of the data holding area of the holding means. 2. The data transfer device according to 1. 4. Creating transfer data to be transferred to a receiving side,
Dividing the holding area of the created data into a plurality of areas, holding the created data while changing the size of each of the divided areas, and transferring the held data to the receiving side. A data transfer method characterized by the above-mentioned. 5. The data transfer method according to claim 4, wherein at the start of transfer of the transfer data, the area size is set small, and the area size is gradually increased as the transfer proceeds. . 6. The apparatus according to claim 4, wherein at the start of the transfer of the transfer data, the area size is set to be small, and the area size is determined while judging a free state of the data holding area. Data transfer method. 7. A data creating means for creating recording data to be transferred to a receiving side, a holding means for holding the recording data created by the data creating means, and receiving the recording data held by the holding means. Transfer means for transferring to the side, dividing the data holding area of the holding means into a plurality of areas,
A recording apparatus, comprising: a changing unit that changes the size of each of the divided areas; and a recording unit that records the transferred recording data on a recording medium by a recording head. 8. The recording method according to claim 7, wherein at the start of data transfer by said transfer means, said area size is set small, and said area size is gradually increased as transfer by said transfer means progresses. apparatus. 9. The data transfer method according to claim 1, wherein when the data transfer is started by the transfer means, the area size is set small, and the area size is determined while judging a free state of the data holding area of the holding means. 8. The recording device according to 7. 10. The recording apparatus according to claim 7, wherein the recording head is an ink jet recording head that performs recording by discharging ink. 11. The recording head, which ejects ink by using thermal energy, includes a thermal energy converter for generating thermal energy to be applied to the ink. Item 8. The recording device according to Item 7. 12. Created recording data to be transferred to a receiving side, divide a holding area for the created recording data into a plurality of areas, and change the size of each of the divided areas while changing the size of each of the divided areas. A recording method comprising: holding recording data; transferring the held recording data to a receiving side; and recording the transferred recording data on a recording medium by a recording head. 13. The recording method according to claim 12, wherein at the start of transfer of the print data, the area size is set small, and the area size is gradually increased as the transfer proceeds. 14. The apparatus according to claim 12, wherein when the transfer of the recording data is started, the area size is set small, and the area size is determined while determining whether the data holding area is empty. Recording method. 15. The recording method according to claim 12, wherein the recording head is an inkjet recording head that performs recording by discharging ink. 16. The recording head according to claim 1, wherein the recording head ejects ink by using thermal energy, and includes a thermal energy converter for generating thermal energy to be applied to the ink. Item 13. The recording method according to Item 12. 17. A data creating means for creating transfer data to be transferred to a receiving side, holding means for holding data created by the data creating means, and transmitting data held by the holding means to a receiving side. In a data transfer device comprising a transfer means for transferring, a computer-readable storage medium storing a program code for performing a data transfer process, dividing a data holding area of the holding means into a plurality of areas,
A computer-readable storage medium having a program code for changing a size of each of the divided areas. 18. A data creating means for creating recording data to be transferred to a receiving side, a holding means for holding the recording data created by the data creating means, and receiving the recording data held by the holding means. Side, and a recording unit for recording the transferred recording data on a recording medium by a recording head, in a computer-readable storage medium storing a program code for performing a data transfer process. Dividing the data holding area of the holding means into a plurality of areas;
A computer-readable storage medium having a program code for changing a size of each of the divided areas. 19. The data processing apparatus according to claim 17, wherein at the start of data transfer by said transfer means, said area size is set small, and said area size is gradually increased as transfer by said transfer means progresses. Computer readable storage medium. 20. When the data transfer by the transfer unit is started, the area size is set to be small, and the area size is determined while judging whether the data holding area of the holding unit is empty. 19. The computer-readable storage medium according to 17 or 18.