JP2003191572A - Printer, print system, print control method, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer in which a high print performance can be sustained while causing any missing of print even if a memory in the printer has a low capacity. <P>SOLUTION: Compressed image data transferred from a host computer 100 is stored temporarily in the receiving buffer in a printer 101 and when it is printed on a sheet being fed in units of page, the host computer 100 calculates the size of a page of generated compressed image data which is then transferred to the printer 101 along with the compressed image data. On the other hand, the printer 101 compares the size of a page of received compressed image data with a maximum size transferable before ending sheet feed operation. When missing of print is predicted, difference between the size of compressed image data and the maximum transferable size is received in advance and sheet feed operation is started upon finishing reception of the difference. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, a printing system, a printing control method, and a program for converting printing image data transmitted from a host computer into data suitable for an output format of a printing mechanism section for printing. And a storage medium.

[0002]

2. Description of the Related Art Conventionally, as a general usage pattern, this type of printing apparatus has been connected to a host computer on a one-to-one basis via one bidirectional interface (for example, serial, parallel, USB, etc.). .

The printer driver operating on the host computer receives the print data output from the application program also operating on the host computer, expands it into image data in page units, and then performs compression processing to obtain a compressed image. The compressed image data is transferred to the printing device after the data is generated and further spooled.

On the other hand, when the printing apparatus starts to receive the compressed image data from the host computer, it simultaneously starts the paper feeding process to improve the printing performance, and further sequentially receives the compressed image data transmitted from the host computer. However, decompression processing is performed, the decompressed image data is converted into a video signal, and the converted video signal is output to the printing mechanism unit (printer engine) in the printing apparatus.

It has been a general practice to perform such a printing process page by page and end a series of printing processes.
Further, it is possible to parallelize the processing of receiving the compressed image data transmitted from the host computer, the processing of expanding the compressed image data, and the processing of converting the expanded image data into a video signal and outputting it to the printer engine in the printing apparatus. This is generally performed, whereby high printing performance can be realized even if the storage area of the compressed image data in the printing apparatus has a small capacity.

[0006]

However, in the above-mentioned conventional printing apparatus, in the case of a printing apparatus such as a laser beam printer in which once the paper feeding process is started and the paper transportation cannot be stopped halfway, the paper transportation time is increased. It was possible to obtain a correct print result only up to the size (maximum transferable size) at which the compressed image data could be transferred.

That is, when the compressed image data in page units is very large, the transfer of the compressed image data from the host computer cannot keep up with the paper transport speed in the above printing process, resulting in the loss of printing ( O
There was a problem of causing VER RUN).

In response to this problem, recently, a print control method has been generalized in which the compressed image data is temporarily secured in a storage area (memory) in the printing apparatus and then the paper feeding process is started. However, in this case, it is necessary to provide a large-capacity memory in the printing apparatus for securing one page of compressed image data. Furthermore, since the compressed image data is temporarily secured in the storage area of the printing apparatus before the printing operation is started, there is a problem that the printing speed is significantly reduced.

Therefore, according to the present invention, even if the memory in the printing apparatus has a small capacity, the printing is not lost.
An object of the present invention is to provide a printing apparatus, a printing system, a printing control method, a program, and a storage medium capable of performing printing processing from a host computer while maintaining high printing performance.

[0010]

In order to achieve the above object, the printing apparatus of the present invention starts feeding of a recording medium when receiving print data in page units and storing the print data in the memory, In a printing device for printing the print data stored in the printed recording medium on the fed recording medium, an acquisition unit for acquiring the size of the print data for one page to be printed, and the acquired print data for one page A loss prediction unit that predicts a print loss based on the size, and a feed start timing that delays the start of feeding the recording medium by a predetermined time with respect to the start of receiving the print data when the print loss is predicted. And a determining means.

Further, the printing system of the present invention comprises an information processing apparatus and a printing apparatus, transfers print data from the information processing apparatus to the printing apparatus, receives the transferred print data, and stores the print data in the printing apparatus. In a printing system for starting feeding of a recording medium in the printing device and printing the print data stored in the memory on the fed recording medium when storing the print data in page units, Generating means for generating the print data, an acquiring means for acquiring the size of the generated print data for one page, and a loss prediction means for predicting a print loss based on the size of the acquired print data for one page. And a feeding start timing determining unit that delays feeding start of the recording medium by a predetermined time with respect to the start of receiving the print data when the printing loss is predicted.

Further, according to the print control method of the present invention, when the print data is transferred from the information processing device to the print device and the transferred print data is received and stored in the memory of the print device, In a print control method of starting feeding of a recording medium in the print medium and printing the print data stored in the memory on the fed recording medium, a step of generating the print data in page units, The step of acquiring the size of the print data for one page, the step of predicting the missing print based on the size of the acquired print data for the one page, and the step of predicting the missing print, Delaying the start of feeding of the recording medium with respect to the start of reception of print data by a predetermined time.

The present invention also resides in a storage medium and a program for holding a computer-readable program code for implementing the above print control method.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a printing apparatus, a printing system, a printing control method, a program and a storage medium of the present invention will be described with reference to the drawings. In the present embodiment, the case where the present invention is applied to a printing apparatus (laser beam printer) that performs printing page by page by an electrophotographic process method using a laser beam is shown. FIG. 1 is a block diagram showing a functional configuration of a printing system according to the embodiment.
This printing system comprises a host computer 100 and a printing apparatus 101.

In the host computer 100, 1
Reference numeral 02 denotes a print information analysis unit that analyzes print information output from the application program and outputs image information when the print processing of the application program operating on the host computer 100 is executed.

An image information generation unit 103 converts the image information analyzed by the print information analysis unit 102 into an intermediate language unique to the printing apparatus 101. An image data decompression / compression unit 104 decompresses print image data based on the intermediate language generated by the image information generation unit 103, and performs compression processing on the decompressed print image data.

Reference numeral 105 denotes an image data expansion / compression unit 10.
4 is a compressed data size calculation unit that calculates the size of the compressed image data created by No. 4. A spool file management unit 106 writes the compressed image data output from the image data decompression / compression unit 104 into a spool file. The spool file management unit 106 writes the compressed image data to the spool file, simultaneously reads the compressed image data written to the spool file, and sends the compressed image data to the compressed image data transfer unit 107. A compressed image data transfer unit 107 transfers the compressed image data sent from the spool file management unit 106 to the printing apparatus 101 in synchronization with the processing in the printing apparatus 101.

Besides, in the host computer 100, a screen display / operation control unit 210 and a printing environment detection unit 20 are provided.
9 and an application 202 are provided (see FIG. 2). In addition, the above-mentioned respective parts are the host computer 100.
It is realized by a CPU (not shown) therein by executing a control program stored in a recording medium (not shown).

On the other hand, in the printing apparatus 101, 108 receives the compressed image data transmitted from the host computer 100, performs decompression processing, then converts the decompressed image data into a video signal and transfers it to the printing mechanism section 110. Is a print information control unit.

Reference numeral 109 is a paper feed timing for realizing optimum printing performance based on the size of the compressed image data calculated by the compressed data size calculation unit 105 without causing page printing loss (OVERRUN). The paper feed start timing determination unit determines the paper feed start timing determination unit 109, and instructs the printing mechanism unit 110 to start the paper feed processing according to the timing determined by the paper feed start timing determination unit 109.

Reference numeral 110 denotes a printing mechanism unit, which is a printing mechanism (printer engine) 214 that controls printing, and a control mechanism (engine controller) that controls paper feeding / conveying processes (paper feeding mode and paper discharging process) in the printing mechanism unit. 213 (see FIG. 2).

FIG. 2 is a diagram showing the operation of each functional unit in the printing system. On the host computer 100 side, the print information analysis unit 102, the compressed image data transfer unit 107, and the print environment detection unit 209 in the host computer 100 are activated at the same time when the host computer 100 is activated.

When the operator gives an instruction to print out while executing some application program 202,
The application program 202 sends print information such as a drawing command and a control command to the print information analysis unit 102. The print information analysis unit 102 uses the application program 2
The print information output from 02 is analyzed, and the image information as the analysis result is output to the image information generation unit 103. Here, the print information is a print command for designating data such as a character code, a figure, and an image for actually performing print processing, a print position and size, a print direction (orientation), and the like.

The image information generation unit 103 converts the image information in page units into an intermediate language unique to the printing apparatus 101 and the printing system in segment units to be described later, and generates an intermediate language for one page. The language is sent to the image data expansion / compression unit 105.

The image data decompression / compression unit 104 decompresses print image data based on the intermediate language in units of segments, compresses the decompressed print image data into compressed image data, and spools this compressed image data. It is sent to the file management unit 106. At this time, the compressed data size calculation unit 105 performs the addition process of the size of the image data compressed in each segment in synchronization with the compression process of the image data decompression / compression unit 104, and finally one page worth. Calculate the size of the compressed image data. The calculated size of the compressed image data is sent to the spool file management unit 106 together with the compressed image data.

The spool file management unit 106 writes the compressed image data sent by the image data decompression / compression unit 104 to the spool file, and at the same time, sequentially reads the compressed image data for one page written in the spool file and compresses it. Image data transfer unit 107
Send to. The compressed image data transfer unit 107 transfers the compressed image data read from the spool file to the printing apparatus 101 via the interface cable.

The printing environment detection unit 209 also monitors the status of the printing apparatus sent from the printing apparatus 101 via the interface cable. Further, the screen display / operation control unit 210 displays the status (status) of the printing apparatus from the printing environment detection unit 209 on the screen of the host computer 100, and the printing environment performed by the operator for this printing apparatus. To set. 3 and 4
FIG. 5 is a diagram showing the state (status) of the printing apparatus displayed on the screen of the host computer 100 by the screen display / operation control unit 210. FIG. 3 shows that printing has failed (warning), FIG. 4 shows that printing is possible, and FIG. 5 shows that printing is in progress.

Next, the operation of each functional unit on the printing apparatus 101 side will be described. When the compressed image data for one page is written in the spool file, the host computer 100
Printing device 10 via compressed image data transfer unit 107
A print start command is transmitted to 1. The print start command sent from the host computer 100 passes through the printer controller 212 and the engine controller 213.
Transferred to. Here, the printer controller 212
Configures the print information control unit 108 and the paper feed start timing determination unit 109 in FIG.

Further, the compressed image data in segment units sent from the host computer 100 via the compressed image data transfer unit 107 is transferred to the image memory (RAM) 1304 in the printer controller 212 and converted into the original image data. After being decompressed, it is converted into a video signal and is sent to the printer engine 214 which performs actual printing processing.

Here, the control program installed in the printer controller 212 is based on the size of the compressed image data sent from the host computer 100, as will be described later, and print missing (OVER R) of this page is performed.
The paper feed start timing determination unit 109 that determines the paper feed timing for realizing the optimum printing performance without generating (UN) is realized.

The printer controller 212 gives an instruction to the printer engine 214 to start the paper feeding process at an optimum timing.

The printing environment information of the printing mechanism section 110 is sent to the host computer 1 via the printer controller 212.
00. Then, the host computer 100
The print environment detection unit 209 therein receives the print environment information transmitted from the printing apparatus 101 and notifies the print information analysis unit 102 and the screen display / operation control unit 210 of the print environment information.

FIG. 6 is a diagram showing an intermediate language generation operation on the host computer 100. First, a print image for one page is divided into a plurality of parts (segment units) 302. Here, the print information analysis unit 102 and the image information generation unit 103 are configured by the application program 202
With respect to the various drawing commands output by, the drawing commands are decomposed into segment units, converted into intermediate language format data 301, and stored in the work memory of the host computer 100.

FIG. 7 is a diagram showing an outline of the printing process. The drawing command output from the application program 202 is converted into the intermediate language format data 301 for each segment. When the intermediate language format data 301 for one page is prepared, the image data decompressing / compressing unit 104 sequentially decompresses the image data from the intermediate language in segment units, and further compresses the spooled file 4.
Written in 02.

FIG. 8 is a diagram showing the expansion / compression processing. First, the intermediate language format data 30 generated for each segment
Image data expansion processing is performed for each 1 to 1 segment, and the expanded image data 401 is further compressed to obtain compressed image data 901 in segment units.
To create. This series of processing is performed for all the segments, and finally, the compressed image data 902 of all the segments (page units) are collected into one and written in the spool file 402. At this time, the total size of the image data 901 compressed for each segment by the compressed data size calculation unit 105 is written to the spool file 402 together with the compressed image data 902.

Next, the compressed image data 90 for one page
When 2 is written in the spool file 402, the compressed image data is sequentially transferred from the spool file 402 to the printing apparatus 101.

FIG. 9 is a diagram showing the format of the spool file 402. First, the spool file 402 is stored in a secondary storage device such as a hard disk as one file per document. Each file has the format shown in FIG.

Reference numeral 1001 is document start information for storing information on the entire document. Information such as the number of print copies is set in the document start information. 1
002 is information (print data) for each page. Reference numeral 1003 is page start information in each page information. In the page start information 1003, information such as a paper size and a paper feed / eject port designation is set. As described above, 902 is compressed image data in page units. Compressed image data 902 in page units
Is composed of the compressed data size and the actual compressed image data. 1004 is page end information. 100
5 is end information of the entire document.

Next, an outline of the print control process of this embodiment will be shown. 10, 11, and 12 are diagrams showing the relationship between one page of compressed image data and the maximum transferable size. In an electrophotographic process type printing apparatus such as a laser beam printer, once paper feeding is started, it is not possible to stop paper transportation during printing. Therefore, in order to improve the printing performance, the paper feeding is started at the same time when the transfer of the compressed image data from the host computer is started. However, in this case, a correct print result can be obtained only up to the size (maximum transferable size) of the compressed image data that can be transferred within the paper conveyance time of the printing apparatus.

As shown in FIG. 10, when the compressed image data for one page is smaller than the maximum transferable size, the maximum throughput can be realized by starting the paper feed at the same time when the transfer of the compressed image data is started. However, as shown in FIG. 11, when the compressed image data for one page is larger than the maximum transferable size, if the paper feed is started at the same time when the transfer of the compressed image data is started, the transfer of the compressed image data cannot catch up with the paper conveyance. However, a missing print (OVER RUN) occurs. In this case, for example, the warning shown in FIG.
It is displayed on the 0 screen.

Therefore, when the compressed image data for one page is larger than the maximum transferable size, as shown in FIG. 12, the difference between the compressed image data size and the maximum transferable size is preceded by the receive buffer ( BUF
FER), and paper feeding is started at the end of the differential transfer, the maximum throughput can be realized without causing printing loss.

FIG. 13 is a diagram showing a specific configuration of the printing apparatus 101. The host computer 100 is connected to the printing apparatus 101 via an interface cable, and sends various print data to the printing apparatus 101 and receives status from the printing apparatus 101.

As described above, the printing apparatus 101 is a laser beam printer that uses a laser beam from a light emitting element, and is mainly composed of a printer controller 212 and a printing mechanism section 110.

The printer controller 212 receives the print data transmitted from the host computer 100, generates a print image (bitmap data) based on the print data, and sequentially outputs the bitmap data to the printing mechanism section 110. Convert to video signal and send. Further, the printer controller 212 receives various statuses from the printing mechanism unit 110 and transmits the statuses to the host computer 100 as needed.

The printing mechanism section 110 actually forms a latent image on the photosensitive drum based on the video signal sent from the printer controller 212, visualizes the latent image using toner, and transfers it to a sheet (plain paper). After that, the paper is passed through the fixing device to obtain stable print output. The printing mechanism unit 110 is composed of an engine controller (control unit) 213 that controls the entire printing mechanism unit, an optical system 1106, and an electrophotographic process / paper transport system 1107.

The control unit 213 is the printer controller 2
12 receives a video signal and a control command for the print mechanism unit 110, transmits the status of the print mechanism unit 110 to the printer controller 212, and also receives the electrophotographic process / paper transport system 1107 and the optical system 1106.
To control.

FIG. 14 shows an electrophotographic process / paper transport system 1.
FIG. 10 is a perspective view showing the configuration of 107. In FIG. 14, 1
201 is a paper feed cassette. Reference numeral 1202 is a sheet conveying roller. Reference numeral 1203 is a photosensitive drum. 1204 is a fixing device. Reference numeral 1205 is a sheet.

FIG. 15 is a view showing the arrangement of the printer controller 212. In the figure, reference numeral 1301 denotes a host computer interface circuit, which functions as a signal input / output unit for the host computer 100. Thirteen
A central processing unit (CPU) 02 controls the entire printer controller 212. Reference numeral 1303 denotes a memory (ROM) in which a control program executed by the central processing unit (CPU) 1302 is stored. 1304 is CP
A rewritable memory (RAM) that stores necessary information when the U 1302 executes the control program stored in the memory (ROM) 1303.

In the paper feed start timing determination unit 109, as described above, the CPU 1302 has the memory (ROM) 130.
It is realized by executing the control program stored in 3. Further, the reception BUFFER of the compressed image data transmitted from the host computer 100 and the expansion area of the received compressed image data of the segment unit are secured in the memory (RAM) 1304. Thirteen
Reference numeral 05 denotes print image data (bitmap data) expanded in a rewritable memory (RAM) 1304.
Is an output buffer register for converting the image signal into the image signal VDO. Reference numeral 1306 is a synchronous clock generation circuit that generates an image clock signal VCLK synchronized with the BD signal. Further, 1307 is an interface circuit which is a signal input / output unit for the printing mechanism unit 110.

The print control operation of the print system having the above configuration will be described. FIG. 16 is a flow chart showing a procedure for expanding / compressing print image data for one page and a procedure for calculating a compressed data size in the host computer 100. This processing program is stored in a recording medium such as a hard disk in the host computer 100, and once executed, the R program in the host computer 100 is temporarily executed.
After being loaded into the AM (not shown), it is executed by the CPU (not shown) in the host computer 100.

First, the compressed data size is set to 0 (step S1). Then, it is determined whether or not the processing for all the segments on this page has been completed (step S2). If the processing of all segments is not completed, the image data is expanded from the intermediate language of this segment (step S
3). Further, the expanded image data is compressed (step S4). Then, the size of the compressed image data is added to the compressed data size, and the process for the next segment is performed. Therefore, the process returns to step S2. On the other hand, when the processing of all the segments is completed in step S2, the compressed data size is set at the head of the compressed image data 902 for one page, the compressed data size is written in the spool file 402, and the processing is completed.

FIG. 17 is a flow chart showing a print processing procedure in the printer controller 212 in the printing apparatus 101. This processing program is stored in the ROM 1303 in the printer controller 212, and the CP
It is executed by U1302. First, the printing apparatus 101
The printer controller 212 therein waits for data input from the host computer 100 (step S1).
1). Then, if there is any input, the input data is analyzed (step S12).

As a result of the analysis, when the input data is the document start information 1001, a print start process is performed (step S13), and the process returns to step S11 to receive the next input data. On the other hand, when the input data is the information (print data) 1002 for each page, the printing process is performed (step S14), and the process returns to step S11 to receive the next input data. Details of this printing process will be described later. On the other hand, when the input data is the document end information 1005, the print end process is performed (step S15), and the process returns to step S11 to receive the next input data. If the input data is other, the process returns to step S11 to receive the next input data without performing any processing.

FIG. 18 is a flow chart showing the print processing procedure in step S14. First, it waits for input of print data from the host computer 100 (step S21). If there is any input, the input data is analyzed (step S22). As a result of the analysis, when the input data is the page start information 1003, the page start process is performed (step S23), and the process returns to step S21 to receive the next input data. On the other hand, when the input data is the compressed image data 902, the printing process is performed (step S24), and the process returns to step S21 to receive the next input data. Details of this printing process will be described later. On the other hand, the input data is the page end information 1
If it is 004, page end processing is performed (step S2
5) Then, this process ends. If the input data is other, the process returns to step S21 without doing anything.

FIG. 19 is a flow chart showing the print processing procedure in step S24. First, the compressed data size set at the beginning of the compressed image data 902 is referred to, and the size of the compressed image data is compared with the maximum transferable size (step S31). If the size of the compressed image data is smaller than the maximum transferable size, the process proceeds to step S34.

On the other hand, when the size of the compressed image data is larger than the maximum transferable size, the difference between the size of the compressed image data and the maximum transferable size is calculated (step S32). The compressed image data is read in advance by the calculated difference into the reception buffer (BUFFER) (step S33). After this reading is completed, the printer engine 214 is activated to start feeding (step S3).
4).

Further, while transferring the remaining compressed image data to the receiving buffer, decompressing the compressed image data and transferring the decompressed image data to the printer engine 214 are performed to process the compressed image data for one page. When is finished, this processing is finished.

As described above, according to the present embodiment, by transferring only the difference between the size of the compressed image data and the maximum transferable size in advance, even if the receiving buffer in the printing apparatus 101 has a small capacity, printing can be performed. It is possible to perform the print processing from the host computer 100 while maintaining high printing performance without causing a dropout.

The above is a description of the embodiments of the present invention, but the present invention is not limited to the configurations of these embodiments, and the functions shown in the claims or the configurations of the embodiments are not limited thereto. Any structure can be applied as long as it can achieve the function it has.

For example, in the above embodiment, the case where the printing device is a laser beam printer has been shown, but the present invention is not limited to this, and the present invention is also effective for a printing device that uses an LED array, a liquid crystal shutter or the like as a light emitting element. Needless to say. Further, although the electrophotographic process type printing apparatus is shown as the printing mechanism, the present invention is applicable to any printing mechanism that performs printing processing in page units regardless of the printing mechanism. Printing mechanism (inkjet, serial,
It is also effective for heat transfer).

It goes without saying that the present invention can also be applied to the case where it is achieved by supplying a program code of software for realizing the functions of the above-described embodiments to a system or an apparatus. In this case, the program code itself realizes the novel function of the present invention, and the program itself and the storage medium storing the program constitute the present invention.

In the above embodiment, FIG. 17, FIG. 18, FIG.
The program code shown in the flowchart of 9 is stored in ROM which is a storage medium. The storage medium for supplying the program code is not limited to the ROM, but may be, for example, a flexible disk, a hard disk, a CD-ROM, a C.
A DR, a DVD, a magnetic tape, a non-volatile memory card, or the like can be used.

[0063]

As described above, according to the present invention, even if the memory in the printing apparatus has a small capacity, the printing is not lost.
It is possible to perform print processing from the host computer while maintaining high print performance.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of a printing system according to an embodiment.

FIG. 2 is a diagram illustrating an operation of each functional unit in the printing system.

FIG. 3 is a diagram showing a state (status) of the printing apparatus displayed on the screen of the host computer 100 by the screen display / operation control unit 210.

FIG. 4 is a diagram showing a state (status) of the printing apparatus displayed on the screen of the host computer 100 by the screen display / operation control unit 210.

5 is a diagram showing a state (status) of the printing apparatus displayed on the screen of the host computer 100 by the screen display / operation control unit 210. FIG.

6 is a diagram showing an operation of generating an intermediate language on the host computer 100. FIG.

FIG. 7 is a diagram illustrating an outline of print processing.

FIG. 8 is a diagram showing expansion / compression processing.

FIG. 9 is a diagram showing a format of a spool file 402.

FIG. 10 is a diagram showing a relationship between one page of compressed image data and a maximum transferable size.

FIG. 11 is a diagram showing the relationship between one page of compressed image data and the maximum transferable size.

FIG. 12 is a diagram showing the relationship between one page of compressed image data and the maximum transferable size.

FIG. 13 is a diagram illustrating a specific configuration of the printing apparatus 101.

FIG. 14 is a perspective view showing a configuration of an electrophotographic process / paper transport system 1107.

FIG. 15 is a diagram showing a configuration of a printer controller 212.

16 is a flowchart showing a procedure of expanding / compressing print image data for one page and a procedure of calculating a compressed data size in the host computer 100. FIG.

FIG. 17 is a printer controller 2 in the printing apparatus 101.
13 is a flowchart showing a print processing procedure in 12.

FIG. 18 is a flowchart showing a print processing procedure in step S14.

FIG. 19 is a flowchart showing a print processing procedure in step S24.

[Explanation of symbols]

100 host computer 101 printing device 110 printing mechanism 212 Printer controller 402 spool file 902 Compressed image data 1302 CPU 1303 ROM

Claims (9)

[Claims] 1. A printing apparatus which, when receiving print data in page units and storing it in a memory, starts feeding a recording medium and prints the print data stored in the memory onto the fed recording medium. In the above, an acquisition unit that acquires the size of the print data for one page to be printed, a loss prediction unit that predicts a print loss based on the size of the acquired print data for one page, and A printing apparatus, comprising: a feeding start timing determining unit that delays the feeding start of the recording medium by a predetermined time with respect to the reception start of the print data when a dropout is predicted. 2. The printing apparatus according to claim 1, wherein the loss prediction unit further predicts the printing loss based on a reception speed of the print data and a feeding speed of the recording medium. 3. The missing prediction unit compares the size of the acquired print data for one page with the maximum size that can be received before the feeding is completed, and the size of the print data is smaller than the maximum size. When it is large, the print start is determined, and when the print start is predicted, the feeding start time determination means receives the print data corresponding to the difference between the print data size and the maximum size. The printing apparatus according to claim 1, wherein the start of feeding the recording medium is delayed until the end of the printing. 4. The feeding start timing determining means performs feeding start of the recording medium at the same time as reception start of the print data when the lack of printing is not predicted. Item 3. The printing device according to item 3. 5. A receiving means for receiving compressed image data processed by an external information processing device as the print data, a storage means for temporarily storing the received compressed image data in the memory, and the storage means. 5. The printing apparatus according to claim 1, further comprising: a decompressing unit that decompresses the compressed image data and converts the decompressed image data into a video signal, and prints in accordance with the video signal. 6. An information processing apparatus and a printing apparatus are provided, wherein when the print data is transferred from the information processing apparatus to the printing apparatus and the transferred print data is received and stored in a memory in the printing apparatus, In a printing system that starts feeding a recording medium in the printing device and prints the print data stored in the memory on the fed recording medium, a generation unit that generates the print data in page units, An acquisition unit that acquires the size of the generated print data for one page; a loss prediction unit that predicts a print loss based on the size of the acquired print data for one page; A printing system comprising: a feeding start timing determining unit that delays the feeding start of the recording medium by a predetermined time with respect to the reception start of the print data when predicted. 7. When a print data is transferred from an information processing device to a printing device, and the transferred print data is received and stored in a memory in the printing device, a recording medium is fed in the printing device. In the print control method of starting and printing the print data stored in the memory on the fed recording medium, a step of generating the print data page by page, and generating the print data of one page A step of acquiring a size, a step of predicting a print omission based on the size of the acquired print data for one page, and a case where the print omission is predicted, with respect to the start of receiving the print data, And a step of delaying the start of feeding the recording medium for a predetermined time. 8. A storage medium holding a computer-readable program code for implementing the print control method according to claim 7. 9. A program having a computer-readable program code for realizing the print control method according to claim 7.