JP2003134345A - Information processing method an apparatus thereof, and controlling program and recording medium thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing method and apparatus thereof, and the controlling program and recording medium of the same information processing apparatus wherein its using memory quantity can be cut down. SOLUTION: In the information processing apparatus, there are performed such controls by an MPU 101a as to generate a predetermined information; as to subject to a compression processing by a first compression method the information to be outputted to an information outputting apparatus 200 after the certain constant lapse of time; as to subject the information subjected to the compression processing by the first compression method to the decoding processing matched to the first compression method in the timing of outputting it to the information outputting apparatus 200; as to subject the decoded information again to a compression processing by a second compression method matched to the method of the decoding processing used in the information outputting apparatus 200; and as to output the resultant information to the information outputting apparatus 200.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing method for outputting image information to an image output device (information output device) such as an inkjet printer which receives image information,
The present invention relates to an information processing device, a computer-readable control program for controlling the information processing device, and a storage medium storing the control program.

[0002]

2. Description of the Related Art Generally, conventional driver software applied to an image output device (information output device) that receives line-divided image information is basically the same except for the resolution and print color of the image output device. Generally, the subsequent data processing, which is required when the line segmentation information conforming to the data format of (1) and (2) is received and the individual output device is mounted, is performed inside each image output device.

However, with the recent widespread use of image output devices, it is required to provide these devices at a lower price. On the other hand, the information processing capability of the host device to which these image output devices are connected is rapidly increasing.

Due to this background, a part of the processing performed inside the image output apparatus is part of the host apparatus (information processing apparatus).
It has been attempted to reduce the amount of hardware of the image output device and thus to reduce the price of the device by migrating to the driver software for the image output device that operates in (1).

For example, driver software for generating a discharge pattern of the water-proofing agent discharged according to each pixel forming an image, or physical displacement of print heads (recording means) of respective colors forming an image. Driver software for shifting the phase of the line-divided image information and sending it.

As such an image output device, an image output device having a side-by-side head structure in which recording means of each color are arranged in parallel in the raster direction for recording is generally used, but the image output device is compact in the raster direction. Sub-scanning the recording means for each color because of the advantages such as the ability to design the image, bleeding of the image at the color boundary, little color shift in the scanning direction of the recorded image, and cost advantage of the print recording head alone. A head configuration in which the heads are arranged in a direction (in a vertical arrangement) is increasingly used.

In the above-described conventional image output apparatus having a side-by-side head configuration, the main scanning direction (hereinafter, referred to as raster direction) of the recording head, which is known as "line sequential type", is known.
In addition, a method of transferring image information for each color for each raster or for each row by combining a plurality of rasters, that is, Y (yellow), M (magenta), and C (cyan) of the same raster or the same row. , Bk (black) image data is transmitted / received, and then the Y, M, C, Bk image data of the next raster or the next row is generally transmitted / received.

Specifically, a raster image data transfer command,
It is realized by a combination of a raster position movement command, an in-page raster number setting command, a line feed command, and the like.

On the other hand, in the conventional output image apparatus having the vertically arranged head structure, when the color data is transferred by using the above-mentioned "line-sequential system" when the color recording is carried out, the bit of the image data is expanded. The map memory area required a much larger capacity than the output image device having a side-by-side head configuration.

As a conventional example attempting to solve this problem, Japanese Patent Application Laid-Open No. 8-142349 or Japanese Patent Application Laid-Open No. 8-15.
No. 0735, it is a method of transferring image information to be transferred to an image output device by previously shifting the timing by the offset of the position of the recording head with respect to the reference color (hereinafter referred to as “offset transfer method”). .).

By this offset transfer method, it is possible to reduce the memory area required in the image output device having the vertically arranged head configuration.

[0012]

However, as the resolution and the number of gradations of the image output device are increased, the amount of memory stored in the host device to which the image output device is connected tends to increase.

When the amount of memory stored in the host device exceeds the amount of memory available to the host device, paging, swapping, etc. occur and the information processing capability of the host device is significantly reduced.

The present invention has been made to solve the above-mentioned problems of the prior art, and its object is to perform information processing capable of reducing the amount of memory used in an information processing device such as a host device. A method, an information processing device, a control program for the information processing device, and a storage medium.

[0015]

In order to achieve the above object, an information processing method according to claim 1 of the present invention is an information generating step of generating predetermined information, and information output after a certain period of time. The information output to the device is compressed by the first compression method, and the information compressed by the first compression method is decoded at the timing when the information is output to the information output device. In the second compression method, which is the same as the decoding method, the compression process is performed again and a control step is performed to control the information output device to output information.

In order to achieve the above object, the information processing method according to claim 2 of the present invention is the information processing method according to claim 1, wherein Huffman coding is used as the first compression method. Method, and a Packbits compression method is used as the second compression method.

In order to achieve the above object, the information processing method according to claim 3 of the present invention is the information processing method according to claim 1 or 2, wherein the information is image information. And

Further, in order to achieve the above object, an information processing apparatus according to a fourth aspect of the present invention outputs an information generating means for generating predetermined information and an information output apparatus after a certain period of time. The information is compressed by the first compression method, and the information compressed by the first compression method is decoded at the timing when the information is output to the information output device, and is decoded by the information output device. A second compression method which is the same as the above method, and a control means for controlling the information output device to output information to the information output device again.

In order to achieve the above object, the information processing apparatus according to a fifth aspect of the present invention is the information processing apparatus according to the fourth aspect, wherein compression using Huffman coding is used as the first compression method. Method, and a Packbits compression method is used as the second compression method.

In order to achieve the above object, the information processing apparatus according to claim 6 of the present invention is the information processing apparatus according to claim 4 or 5, wherein the information is image information. And

In order to achieve the above object, a control program for an information processing device according to a seventh aspect of the present invention is a computer-readable control program for controlling the information processing device, and the predetermined information. And an information generating step of generating the information, the information output to the information output device after a certain period of time is compressed by the first compression method, and the information compressed by the first compression method is the information. A control is performed such that the decoding process is performed at the timing of being output to the output device, and the compression process is performed again by the second compression method which is the same as the decoding method of the information output device and the information is output to the information output device. And a control code for causing a computer to execute the control steps.

In order to achieve the above object, the control program of the information processing apparatus according to claim 8 of the present invention is the control program of the information processing apparatus according to claim 7, wherein the first compression method is A compression method using a Huffman code is used, and a Packbits compression method is used as the second compression method.

Further, in order to achieve the above object, a storage medium according to a ninth aspect of the present invention is characterized by storing the control program of the information processing apparatus according to the seventh and eighth aspects.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, each embodiment of the present invention will be described.
A description will be given with reference to the drawings.

(Outline of the Present Invention) In the present invention, data that needs to be temporarily stored in an information processing device such as a host device by processing such as offset transfer is compressed by a coding method with a high compression rate, The data output to the information output device is compressed by an encoding method that is decoded in the information output device and transferred to the information output device.

(First Embodiment) First, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of an information processing system including the information processing apparatus according to this embodiment.

In FIG. 1, 100 is a host device which is the information processing device according to the present embodiment, and 200 is an information output device (printer).

The host device 100 comprises a host device body 10
1, a display device 102, an HDD (hard disk drive) device 103, and a keyboard 104.

The host apparatus main body 101 is an MPU (Mic
ro Processing Unit: micro processor unit 101a, system bus 101b, DRAM
(Dynamic Random Access Me
memory: write / read memory at any time) 101c, bridge 101d, graphic adapter 101e, HD
D controller 101f, keyboard controller 10
It has 1g and communication I / F 101h.

The MPU 101a controls the entire host device 100 according to the control procedure stored in the DRAM 101c. The system bus 101b connects system components. DRAM 101c
Is for temporarily storing programs and data executed by the MPU 101a. The bridge 101d connects the system bus 101b to the memory bus and the MPU 101a. The graphic adapter 101e has a control function for displaying graphic information on the display device 102. The HDD controller 101f is H
It controls the interface with the DD device 103. The keyboard controller 101g is the keyboard 1
It controls the interface with 04. Communication I /
F101h is a parallel interface, IEEE
It controls communication with the information output device 200 according to the 1284 standard. This communication I / F 101h is a USB
It may be an interface capable of bidirectional communication in accordance with the (Universal Serial Bus) standard.

The display device 102 displays graphic information and the like to the operator, and is a CRT (Cathod-Ra).
y Tube: cathode ray tube), and is connected to the host apparatus main body 101 via a graphic adapter 101e. The HDD device 103 is a mass storage device in which programs and data are stored, and the HDD controller 10
It is connected to the host apparatus main body 101 via 1f.
The keyboard 104 is used by the operator to input various information, and is connected to the host apparatus main body 101 via the keyboard controller 101g.

The information output device 200 has a communication I / F 201 which is a parallel interface. The communication I / F 201 manages communication with the host device 100 according to the IEEE1284 standard.
01 is connected to the communication I / F 101h. Communication I /
F201 is a USB (Universal Serial)
It may be an interface capable of bidirectional communication in accordance with the standard (1 Bus).

As shown in FIG. 4, the information output device 200 includes Y (yellow), M (magenta), and C in the sub-scanning direction.
Recording means for each color of (cyan) and K (black) are arranged. This recording means uses Ck with Bk as a reference color,
M and Y are print recording heads having offsets of 112, 224, and 336, respectively.

Next, the configuration of the control software in the information processing apparatus according to this embodiment having the above configuration will be described with reference to FIG.

First, the driver software installed in the host device 100 will be described with reference to FIG.

FIG. 2 is a diagram for explaining the configuration of the driver software in the information processing apparatus according to the embodiment.

As shown in FIG. 2, the application software layer is provided with an application A1, and the OS (Operating System) layer is provided with a drawing processing interface B1 for receiving a drawing command from the application A1 and a generated image. A spooler B2 that transfers data to an information output device 200 such as an inkjet printer is provided.

In the printer driver hierarchy, a device-specific drawing means C1 in which a device-specific expression format is stored.
1, C12, C13, line-segmented image information receiving means C2 for receiving line-segmented image information from the OS, and color characteristic conversion means for converting the color system in the printer driver into the color system unique to the device. C3, a quantizing means (multi-value quantization means) C4 for converting each device into a quantized amount representing the state, and data for compressing the converted image data by the quantizing means C4 and adding a command header. A compression / command addition means C5 is provided.

Next, the processing operation of the information processing apparatus according to this embodiment will be described with reference to the flowchart of FIG.

The application A1 is the information output device 20.
When outputting an image to 0, the application A1 first uses the drawing processing interface B1 of the OS to
A drawing command for a character, line segment, figure, bitmap, etc. is issued (step S301).

Next, when the drawing command forming the screen / paper surface is completed (step S302), the OS causes the device-specific drawing means C11, C12, C1 in the driver software.
Each drawing command is called from the internal format of the OS while 3 is called (the drawing unit is divided into lines)
To the driver software (step S303), and is then passed to the driver software as image information (hereinafter referred to as raster data) obtained by dividing the screen / paper into line segments (step S303).
304).

Inside the driver software, the color characteristic conversion means C3 corrects the color characteristics of the device, and the color system inside the driver software is converted into the color system unique to the device (step S305), and further quantized. The means C4 performs conversion into a quantization amount representing the state of each pixel of the device (step S306).

Next, data compression / command addition means C5
Performs data compression processing and command addition processing on the image data converted into the quantization amount representing the state of each pixel of the device (step SS307), and passes the generated data to the spooler B2 (step S308). , Outputs data to the information output device 200 (step S30
9) After that, this processing operation is ended.

In the present embodiment, the information output device 200
4, as shown in FIG. 4, recording means for each color of Y, M, C and K (Y104 nozzle, M104 nozzle, C104 nozzle,
Bk104 nozzles) are arranged in the sub-scanning direction (vertical direction), and C, M, and Y are each 1 with Bk as a reference color.
The inkjet printer has a print recording head having offsets of 12,224,336.

Generally, in an ink jet printer equipped with a vertically aligned head, the recording means for each color is arranged at a position to which an offset is added in the sub-scanning direction, so that the raster of the color to which the offset is added is arranged. It is necessary to store data inside the information output device 200, and a large amount of memory is required inside the information output device 200.

In order to avoid this, in the present embodiment,
The printer driver outputs raster data to the information output device 200 in consideration of the offset amount of the recording unit of each color in the data output in advance by the host device 100.

Next, in the host device 100, which is the information processing device according to the present embodiment, an arbitrary image (information)
A specific example in the case of outputting the arbitrary n-th raster data of will be described with reference to FIGS. 5 and 6.

FIG. 5 is a diagram showing the raster data of each color after being converted by the color characteristic converting means C3. Host device 100
If the arrangement of the print recording heads of the information output device 200 connected to is in the main scanning (horizontal arrangement) direction, the data compression / command adding means C5 is applied to the input Vin (n) which is the nth raster data. Each color Y after processing,
Outputs Mk, C, K Vkout (n), Vyout
(N), Vmout (n) and Vcout (n) are output as follows and sent to the spooler B2. Where n
Is an integer starting from 0. (Header representing color) (Command representing color K)
(Data length) (Vkout (n)) (Head representing color) (Command representing Y color)
(Data length) (Vyout (n)) (Header representing color) (Command representing M color)
(Data length) (Vmout (n)) (Header representing color) (Command representing C color)
(Data length) (Vcout (n)) (Line feed command).

FIG. 6 is a diagram showing output data when the raster data of each color converted by the color characteristic converting means C3 of FIG. 5 is output with the offset amount of each color added.

At this time, when Bk is used as a reference for the input Vin (n) which is the n-th raster data converted by the color characteristic conversion means C3, the output of each color is the offset of each information output device 200. Considering the amount, Vko
ut (n), Vyout (n-336), Vmout
(N-224) and Vcout (n-112).

Here, the nth output is (where n> 33
6) is expressed as follows.

However, for each color data having an offset, the offset of each color is offsetC offsetM offsetY, and if (n-offsetC) <0 (n-offsetM) <0 (n-offsetY) <0, then null Output raster data. (Header representing color) (Command representing color K)
(Data length) (Vkout (n)) (Head representing color) (Command representing Y color)
(Data length) (Vyout (n-336)) (Header representing color) (Command representing M color)
(Data length) (Vmout (n-224)) (Header representing color) (Command representing color C)
(Data length) (Vcout (n-112)) (Line feed command) As can be seen from the output result, the phase of the yellow raster is delayed by 336 minutes with respect to the input of the black raster, so the raster of 336 minutes is hosted. DRA of device body 101
It is necessary to hold in M101c, and since the phase of the magenta raster is delayed by 224 minutes, it is necessary to hold a raster of 224 minutes in DRAM 101c, and the same is true for the cyan raster.

That is, in the present embodiment, regarding the color raster having an offset with respect to the reference color black raster,
Raster data must be temporarily stored.

In general, in order to improve the transfer efficiency to the information output device 200, in the data compression / command addition portion, compression processing by the PackBits compression method, which is relatively easy to process, is performed. Pa
Since the ckBits compression method absorbs only the redundancy resulting from the continuity of the data, the compression rate will not be relatively high.

Therefore, in the present invention, the image data which must be temporarily held by the data compression / command adding means C5 is compressed by the compression method using the Huffman code having a high compression rate and output. The data to be compressed is compressed using the compression method (PackBits compression method) of the data restored by the information output device 200.

Next, the information processing apparatus 1 according to the present embodiment
The processing operation in 00 will be described with reference to FIGS. 7 to 9.

FIG. 7 is a diagram showing an input data process, an output data process and a table necessary for the process, which are arranged in the DRAM 101c when the process is performed by the information processing apparatus 100 according to the present embodiment. is there.

In FIG. 7, 701 is a line-divided image information storage buffer for storing line-divided image information (R, G, B raster data) received from the OS, 702 is C converted by the color characteristic conversion means C3, C, M, Y, K raster data storage buffers for storing M, Y, K raster data,
Reference numeral 703 denotes a quantized value data storage buffer for storing the quantized value data after being converted by the quantizing means C4, 704 a holding buffer for holding raster data which should be temporarily held when performing offset transfer processing, 705. Is an output buffer for writing the output data to be sent to the spooler B2, 706 is a frequency distribution table showing the frequency of symbols in 1-byte units of the quantized value necessary for creating the Huffman table, and 707 is for Huffman coding. Is a Huffman coding table, and 708 is a Huffman decoding table that is referenced when performing Huffman decoding.

In order to realize high compression using the Huffman code, it is necessary to find the correct statistical property of the symbol to be coded.

Therefore, in the present embodiment, the quantizing means C4 carries out the processing for obtaining the frequency distribution of the 1-byte unit of the quantized value data of interest as a symbol.

FIG. 8 is a flow chart showing the flow of the processing operation of the quantizing means C4.

First, the quantizing means C4 receives each C, M, Y, K raster data converted by the color characteristic converting means C3, and performs the following processing on each raster data.

From the raster data, one pixel information (1 Byte
e) is received (step S801) and compared with the threshold value held by itself (step S802). The quantization amount is converted based on the comparison result of the magnitude relationship between the threshold value and the pixel value (step S803).

Here, the conversion into the quantization amount corresponds to the form of the data processed by the information output device 200. For example, when recording by the information output device 200 is performed based on binary data. Is binarized and the information output device 200
When the printing is performed based on multi-valued data (printing with dark and light ink, printing with large and small inks, printing with index processing), it means multi-valued printing.

Next, it is checked whether or not the processed data is 1 Byte (step S804). For example, in the case of binary quantization, if the quantization process is repeated 8 times,
This means that Byte processing has been performed. When the processed data reaches 1 Byte, the number of appearances of the corresponding symbol in the frequency distribution table as shown in FIG. 9 is incremented (step S805). Finally, the quantized quantized data is written in the quantized value data buffer 703 (step S806). This process is repeated until the end of the raster data (step S807). When one raster is completed, this processing operation is completed.

The frequency distribution table 706 created by the quantizing means C4 is stored in the DRAM 101c, and the data compression command adding means C5 is stored in the frequency distribution table 70.
6, Huffman coding table 707 and Huffman decoding table 708 are created respectively, and Huffman coding is performed on the temporarily stored data.

Next, the data compression / command addition means C5
The processing operation of will be described with reference to FIG.

FIG. 10 is a flow chart showing the flow of the processing operation of the data compression / command addition means C5.

First, the data compression / command addition means C5
Then, the quantized raster data is received (step S1001), and it is determined whether the received raster data is the first raster of the image data (step S10).
02). If it is the first raster data, the frequency distribution table 706 creates the Huffman encoding table 707 and the Huffman decoding table 708 from the distribution of the symbols of the data of one raster, and sets them as the initial values in the DRAM 101c. Set to (step S
1003). Also, from a typical image data sample,
Optimal default Huffman coding table 707 and Huffman decoding table 708 are created respectively,
You can set it. Here, although not shown, the Huffman coding table 707 and the Huffman decoding table 708 are prepared for each color of C, M, and Y.

Next, it is determined whether or not the received raster data of each color has been processed for each offset (step S1004). Then, if processing for the offset has been performed, the Huffman coding table 707 is created by referring to the frequency distribution table 706 at this point, and the Huffman coding table 707 is overwritten with the current one and updated (step S1).
005).

Originally, the frequency distribution table 70 in raster units
It is considered that the method of updating 6 and referring to it to create the Huffman coding table 707 and the Huffman decoding table 708 has good compression efficiency. However, in such a case, the Huffman code for the raster to be stored is stored. Table 70
7. Huffman decoding table 708 is stored in the DRAM 101c
Must be kept inside.

Therefore, in the present embodiment, the Huffman coding table 707 and the Huffman decoding table 708 are updated in raster units for each color offset, that is, in raster units for storing each color.

After updating the table, it is determined whether or not the raster data is C, M, Y data (raster data having an offset) (step S1006), and C, M, Y is determined.
If it is data, the Huffman encoding table 70
8, Huffman coding is performed, and the holding buffer 70
4 (step S1007).

Next, the data to be output at present is taken out from the holding buffer 704 (step S1008). Then, it is determined whether the decoding for the offset has been performed (step S1009), and if the decoding for the offset has been performed, the Huffman decoding table 708 is updated (step S1010).

Then, the data to be output obtained in step S1008 is converted into the Huffman decoding table 70.
8 for decoding (step S1011).

Finally, the data decrypted in step S1011 is compressed by the PackBits compression method (step S1012), and then the command header is added (step S1013).
The output data is written in the output buffer 705. (Step S1014).

This process is repeated for all rasters of the output image.

Even when the present invention is applied to a system composed of a plurality of devices (eg, host computer, interface device, reader, printer, etc.), a device composed of one device (eg, copier, facsimile). Device).

Further, an object of the present invention is to supply a storage medium having a program code of software for realizing the functions of the above-described embodiments to a system or apparatus, and to supply a computer (or CPU or MP) of the system or apparatus.
It is needless to say that (U, etc.) is also achieved by reading and executing the program code stored in the storage medium.

In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-RO.
M, CD-R, CD-RW, DVD-ROM, DVD-
RAM, DVD-RW, DVD + RW, magnetic tape, non-volatile memory card, ROM, etc. can be used.

Further, not only the functions of the above-described embodiments are realized by executing the program code read by the computer, but also the OS (operating system) running on the computer based on the instructions of the program code. It goes without saying that this also includes the case where the above) performs a part or all of the actual processing and the processing realizes the functions of the above-described embodiments.

Furthermore, after the program code read from the storage medium is written in the memory provided in the function expansion board inserted into the computer or the function expansion unit connected to the computer, based on the instruction of the program code, It goes without saying that the case where the CPU or the like included in the function expansion board or the function expansion unit performs some or all of the actual processing and the processing realizes the functions of the above-described embodiments is also included.

[0085]

As described above, according to the present invention, the data which must be temporarily stored in the information processing device such as the host device can be compressed at a high compression rate.
The capacity of the memory used in the information processing device can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an information processing system including an information processing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a structure of software used in an information processing system including an information processing apparatus according to an embodiment of the present invention.

FIG. 3 is a flowchart showing a flow of processing operations of the information processing system including the information processing apparatus according to the embodiment of the present invention.

FIG. 4 is a diagram showing a state in which recording means of each color are arranged in the sub-scanning direction of the information output device in the information processing system including the information processing device according to the embodiment of the present invention.

FIG. 5 is a diagram showing a raster state of each color after conversion by a color characteristic conversion unit in an information processing system including an information processing apparatus according to an embodiment of the present invention.

FIG. 6 is a diagram showing a state after an offset is added to the raster data of each color after being converted by the color characteristic converting means in the information processing system including the information processing apparatus according to the embodiment of the present invention, and then output. is there.

FIG. 7 is a DRA when processing is performed in an information processing system including an information processing device according to an embodiment of the present invention.
FIG. 6 is a diagram showing raster data, a table, and the like arranged in M.

FIG. 8 is a flowchart showing a flow of processing operation by a quantizing means in an information processing system including an information processing apparatus according to an embodiment of the present invention.

FIG. 9 is a diagram showing a frequency table in the information processing system including the information processing device according to the embodiment of the present invention.

FIG. 10 is a flowchart showing a flow of processing operation by the data compression / command addition means in the information processing system including the information processing apparatus according to the embodiment of the present invention.

[Explanation of symbols]

100 Host Device (Information Processing Device) 101 Host Device Main Body (Information Processing Device Main Body) 101a MPU (Micro Processin)
g Unit: Ultra-compact processor 101b System bus 101c DRAM (Dynamic Random)
Access Memory: write / read memory at any time) 101d bridge 101e graphic adapter 101f HDD controller 101g keyboard controller 101h communication I / F 102 display device 103 HDD (hard disk drive) device 104 keyboard 200 information output device (image output device: printer) 201 communication I / F A1 application B1 drawing processing interface B2 spooler C2 line segmented image information receiving means C3 color characteristic converting means C4 quantizing means (multi-value quantization means) C5 data compression / command adding means C11 device unique drawing means C12 device unique drawing means C13 Device-specific drawing means 701 Line segmented image information storage buffer 702 C, M, Y, K raster data storage buffer 703 Quantized value data storage buffer 04 holding buffer 705 output buffer 706 frequency distribution table 707 Huffman coding table 708 Huffman decoding table

Claims (9)

[Claims] 1. An information generating step of generating predetermined information, and information to be output to an information output device after a certain period of time is compressed by a first compression method and by the first compression method. The decoding processing is performed at the timing when the compressed information is output to the information output apparatus, and the compression processing is performed again by the second compression method which is the same as the decoding method of the information output apparatus. And a control step of controlling so as to output information to the information processing method. 2. The information processing method according to claim 1, wherein a compression method using a Huffman code is used as the first compression method, and a Packbits compression method is used as the second compression method. 3. The information processing method according to claim 1, wherein the information is image information. 4. Information generating means for generating predetermined information,
The information output to the information output device after a certain period of time is compressed by the first compression method, and the information compressed by the first compression method is output to the information output device at the timing. And a control means for performing a decoding process and performing a compression process again by the same second compression method as the method for performing the decoding process in the information output device, and controlling to output information to the information output device. A characteristic information processing device. 5. The information processing apparatus according to claim 4, wherein a compression method using a Huffman code is used as the first compression method, and a Packbits compression method is used as the second compression method. 6. The information processing apparatus according to claim 4, wherein the information is image information. 7. A computer-readable control program for controlling an information processing apparatus, comprising: an information generating step of generating predetermined information; and information to be output to an information output apparatus after a certain time has passed. A method of performing a compression process by a first compression method and performing a decoding process at the timing when the information compressed by the first compression method is output to the information output device and performing a decoding process by the information output device; An information processing apparatus comprising a program code for causing a computer to perform a control step of performing compression processing again by the same second compression method and controlling the information output apparatus to output information. Control program. 8. The information processing apparatus according to claim 7, wherein a compression method using a Huffman code is used as the first compression method, and a Packbits compression method is used as the second compression method. Control program. 9. A storage medium storing the control program of the information processing apparatus according to claim 7.