JPH06214923A - Server device - Google Patents

Abstract

PURPOSE:To enable a host side to utilize easily synthetic picture data by synthesizing converted bit map data and picture data from a scanner, and transferring the synthesized picture data to the host side. CONSTITUTION:Page descriptive language inputted from a LAN through an Ethernet transceiver 9 is stored directly in a specified area (receiving buffer) of a memory 6 by a DMA controller 10, and is converted into a raster image by a page descriptive language interpreter program. Then, when the synthesis of data described by the page descriptive language and sent from the host through the LAN 11 and the scanner-inputted picture data is instructed, a synthesizing means (main CPU circuit 1) synthesizes the bit map data converted by a processing means (main CPU circuit 1) and the picture data from the scanner, and the Ethernet circuit 2 transfers the synthesized picture data to the host side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanner / printer server device connected to a host via a network.

[0002]

2. Description of the Related Art Conventionally, there has been no apparatus for sending an image obtained by combining an image read by a scanner and an image described in a page description language to the host for processing by the host.

[0003]

Therefore, in order to synthesize the image read by the scanner and the image described in the page description language, the host is provided with a means (interpreter) for interpreting the page description language, A method of combining with the image read from the scanner can be considered, but in addition to the memory required for the interpreter and its work area, a memory for storing the image data from the scanner is required, and a huge memory must be installed. There is a problem that it must be. In addition, an interpreter must be installed on the printer side for normal printing operation, and a similar interpreter must be installed on the host side and the printer side. However, there was a problem such as a great waste of money.

The present invention has been made in order to solve the above-mentioned problems, and bitmap data converted based on data described in a page description language transferred from a host via a network and input from a scanner. By synthesizing the created image data on the server device, memory resources on the host side can be realized without expanding expensive memory on each host side on the network and newly providing a means for interpreting the page description language. An object of the present invention is to provide a server device that can easily use synthetic image data that requires a memory that cannot be processed by.

[0005]

A first server device according to the present invention converts an interface means for connecting to a scanner and a printer and data described in a page description language sent from a host into a bitmap. And a synthesizing means for synthesizing the bitmap data and the image data input from the scanner via the interface means, and the image data synthesized by the synthesizing means can be sent to the host via the network. It is composed.

The second server device according to the present invention is provided with a compressing means for compressing the image data synthesized by the synthesizing means, and the image data compressed by this compressing means can be sent to the host via the network. It was done.

[0007]

According to the first aspect of the present invention, when the composition of the data described in the page description language sent from the host via the network and the image data input by the scanner is instructed, the composition means is converted by the processing means. Since the bitmap data and the image data from the scanner can be combined and the combined image data can be transferred to the host side, the data is sent from the host without imposing the burden of expanding resources such as memory on the host side. The host side can easily use the composite image data of the data described in the page description language and the image data input by the scanner.

According to the second aspect of the present invention, since the compression means can compress the image data synthesized by the synthesizing means and send it to the host on the network, a large amount of synthesized image data synthesized on the server device side can be sent. It can be acquired in a short time and easily used by the host side.

[0009]

1 is a system block diagram for explaining the outline of a server device showing a first embodiment of the present invention. In addition,
A detailed system block diagram will be described later.

In the figure, a scanner / printer (SP)
The server will be described later. This system is roughly divided into main C
It is composed of a PU circuit 1, an Ethernet circuit 2, a JPEG compression circuit 3, and a scanner / printer interface circuit 4. When a plurality of scanners / printers are connected to the scanner / printer (SP) server, the scanner / printer interface circuits for that number are mounted. The scanner / printer interface circuit is configured on an independent board in order to easily increase or decrease the number of units, and is connected to the main body by a VME bus 16 described later. The remaining main CPU circuit 1, Ethernet circuit 2,
The JPEG compression circuit 3 is configured on one board and is connected to each other by a local bus 14.

Reference numeral 4-1 is a first scanner / printer interface circuit (first SP interface circuit), which includes a digital color copying apparatus 100 (laser beam color copying apparatus) such as a product name CLC-500 and a VME bus 16. Interface I / O.

Reference numeral 4-2 is a second printer / scanner interface (second SP interface circuit), which is an I between the digital color copying apparatus 200 (bubble jet color copying apparatus) such as the product name Pixeljet and the VMEbus 16. / O interface.

The main CPU circuit 1 is, for example, R3000.
All programs are executed under the control of the CPU 5 such as (product name) and the memory 6 and the like, where OS is VxWorks (product name). A hard disk 7 is an auxiliary storage device for the memory 6. 8 is a SCSI interface. The Ethernet circuit 2 includes an Ethernet transceiver 9 and a DMA controller 10 for DMA-transferring data to the memory 6. The Ethernet transceiver 9 is connected to an Ethernet (trade name) local area network (LAN) 11. JPEG
The compression circuit 3 includes a JPEG compression / decompression controller 12 and an F
The IFO memory 13 and the like. Main CPU circuit 1,
A local bus 14 connecting the Ethernet circuit 2 and the JPEG compression circuit 3 to each other is connected to a VME bus 16 via a VME bus transceiver 15-1.

The first SP interface circuit 4-1 comprises a page memory 17 and a first control circuit 18. The reason why the memory for one page is required is that the flow control cannot be performed midway when the digital color copying apparatus 100 starts printing / scanning. Page memory 17
Composes compressed memory because the price of memory is high. That is, paying attention to the fact that the data written in the memory 17 is only the image rasterized in the memory 6, the memory 17 adopts the ADCT compression method which can obtain a high compression rate though it is lossy compression. . That AD
Although the CT compression chip is not shown in this figure,
The same chip as the PEG compression / expansion controller 12 is used.

However, the ADCT is stored in the page memory 17.
When the compression method is used, the compressed data is used only in the closed circuit and does not go out to the outside. Therefore, it is not necessary to conform to the standard. In fact, an efficient method improved from JPEG is used. ing. The first control circuit 18 is, for example, Z-
A copying machine 100 including a CPU such as 80 (trade name)
I am exchanging control signals other than images with. To reduce the number of interfaces here, control commands are sent serially. First SP interface circuit 4
-1 is a VM via the VMEbus transceiver 15-2
It is connected to the E-bus 16.

The second SP interface circuit 4-2 comprises a data vertical / horizontal conversion circuit 19, a buffer memory 20, an image processing circuit 21, a second control circuit 22 and the like. VME
It is connected to the VME bus 16 via the bus transceiver 15-3. The data vertical / horizontal conversion circuit 19 sets the data format of the image in the scanning direction to 90 in the scanning direction during printing.
The data format of 90 ° to the scanning direction is converted to the scanning direction during scanning. The buffer memory 20 is used as a conversion buffer for that purpose.

The image processing circuit 21 is provided to supplement the image processing function lacking in the copying apparatus 200. The second control circuit 22 is for providing the same function as the first control circuit 18, and is the same CP such as Z-80 (trade name).
It is composed of U etc.

The operation will be described below.

For example, in the case of executing network printing, a page description language (for example, a product name) that comes in from the LAN 11 via the Ethernet transceiver 9
CaPSL) is directly stored in a specific area (reception buffer) of the memory 6 by the DMA controller 10. Therefore, it is converted into a raster image by a page description language interpreter program described later. The JPEG compressed image can be expanded in a page description language (PDL), but the JPEG compression / expansion circuit 3 is used for high-speed expansion.

For reasons of cost, the memory 6 does not have a capacity for rasterizing the entire screen of one page, and the banding method for partially processing the PDL (eg CaPSL) is used several times. Processed separately. Upon completion of rasterization, the first SP interface circuit 4-1 or the second SP interface circuit 4
-2, and output to each printer. An example of executing the network scan will be described later.

FIG. 2 is a system block diagram showing an outline of a network system including the server device shown in FIG.

The network system in this embodiment is, for example, Macintosh (trade name), IBM-PC (trade name),
It is for sharing a small number of scanners and printers connected via a network from application software of a commercially available host computer such as SUN (trade name). In the figure, there are roughly four blocks. From left to right, Macintosh workstation ST1, IBM-PC workstation ST2, SU.
N workstation ST3 and color SP server SP1. Macintosh workstation ST1,
The IBM-PC workstation ST2 and SUN workstation ST3 are commercially available host computers, and the color SP server SP1 is an interface unit designed by the inventor. They are, for example, Ethern
They are interconnected by a local area network 96 called et (trade name). Reference numeral 94 is a first color scanner / printer, and 95 is a second color scanner / printer.

Macintosh workstation ST1, IB
The M-PC workstation ST2, the SUN workstation ST3, and the color SP server SP1 have a common communication interface for mutual communication. 51,6
1, 71 and 81 are local area networks (LA
N) An Ethernet transceiver for communicating with 96. 52, 62, 72 and 82 are communication programs TCP / IP (product name) built on the LAN 96, which is a standard of the US Department of Defense.

This TCP / IP program provides an end-to-end communication service (function) without data error.
53, 63, 73, and 83 are the first color scanner / printer 94 and the second color scanner / printer 95 for Mac
It is a communication program that provides a service (function) for a special purpose of joint use from a station ST1 for intosh, a station ST2 for IBM-PC, and a SUN workstation ST3. Reference numerals 53 and 63 are communication programs that provide client-type services as S / P client programs, and 83 is an S / P server program that is a communication program that provides server-type services.

First from station ST1 of Macintosh
The case of printing with the color scanner / printer 94 will be described. When an original created by the commercial application program 56 is printed, the print manager-
(Printing Manager) 55 OS (Operating Syst)
Control is passed to a part of (em) and control for printing is started. The data format at this time is Macintosh Q
It is standardized to the uickDraw (product name) type. The print manager 55 calls the drawing function group of the conversion program 54 as written in the manuscript. In the call, the conversion program 54 calls QuickDraw, for example, CaPSL.
(Canon Prinnting System Language) Codes are converted one by one and the CaPSL code is stored in a memory (not shown). The conversion program 54 mainly functions as a QuickDraw / CaPSL conversion program.

The communication program 53 uses the obtained CaPSL code in accordance with the TCP / IP program 52 via the Ethernet transceiver 51, LAN 96, and Ethernet transceiver 81, and further the TCP / IP program 8
2. Color SP server S via communication program 83
Transmit to P1. The conversion program 54,
64, 74, communication programs 53, 63, 73, scanner interface programs 57, 67, TCP / IP
The programs 52, 62, 72 and the like may be supplied to the host computer by, for example, a floppy disk or the like. It may also be provided to the host computer as an Ethernet transceiver, for example a board circuit.

The overall operation of the color SP server (S / P server device) SP1 is controlled by the system overall control program 93. The reception of the CaPSL code is also notified to the system overall control program 93. The overall system control program 93 requests the PDL interpreter program 84, which will be described later, to rasterize the CaPSL coded original into a bitmap image. The image data rasterized into the bit map image is passed to the device driver 86, and is transmitted from the video interface Video I / F to the first color scanner / printer 9 via the first printer control board 91, for example.
4 and printed.

The same applies to the case of printing from the station ST2 of the IBM-PC, which is the same as the above data flow.
In the case of the station ST2 of PC, the data format of the printed document is standardized to GDI (product name). The conversion program 64 mainly functions as a GDI / CaPSL conversion program.

When printing from the SUN workstation ST3, since the functions corresponding to the conversion programs 54 and 64 are not standardized, the application program 75 communicates directly via the communication program 73. However, a conversion program 74 for MIF / CaPSL conversion is inserted in between in order to enable printing from a commercially available application program, for example, FrameMaker (product name).

When scanning (reading) an original,
For example, in the case of the station ST1 of the Macintosh, the scanner application program 58 issues a scan request to the communication program 53 via the scanner interface program 57. Then, the communication program 53
Ethernet transceiver 51, LAN 96, Ethernet transceiver 81 and TCP / IP program 8
End-to-End with the communication program 83 via
, And the scan command is transmitted to the overall system control program 93, and requests the scanner control program to scan the first color scanner / printer 94.

On the contrary, the image data of the scanned original is
First control board 91, device driver 86, communication program 83, TCP / IP program 82, Ethernet transceiver 81, LAN 96, Ethernet transceiver 51, TCP / IP program 52, communication program 53, device driver 57, scanner application program 58 in this order. Transmitted.

The same applies when scanning an original document at the station ST2 of the IBM-PC, but when scanning from the SUN workstation ST3, the functions equivalent to the device driver 57 and the scanner interface program 67 are not standardized. The scanner application program 76 communicates directly via the communication program 73. The scanner interface programs 57 and 67 control the data of the scanner application and the communication program.

A second color scanner / printer 95, which is another scanner / printer, is connected to the color SP server SP1, and the second color scanner / printer 95 is connected via the second control board 92. Are controlled similarly.

All programs of the color SP server SP1 including the system-wide control program 93 are
For example, it operates under the control of a system program (OS) called VxWorks (product name).

In order to accept a request from a general UNIX workstation that does not have a special program for this service (for example, the communication program 73, the conversion program 74, etc.), the color SP server SP1 runs in parallel with the communication program 83. The semi-industry standard lpr / lpd communication program 90 is also included.

FIG. 3 is a diagram showing a network construction state of the server device and each host computer according to the present invention.

As shown in this figure, the host computers HOST1 to HOSTN are Macintosh (trade name) and IBM-PC.
Data processing is controlled by each OS in a host computer such as (product name) or SUN (product name). These host computers HOST1 to N are
An Ethernet interface board 97 for communicating with the LAN 96, an image compression / expansion board 98, and a CPU board 99 are provided respectively. The image compression / expansion board 98 may be realized by software processing on a memory. Further, when compression / expansion is not used when inputting / outputting image data, the image compression / expansion board 98 becomes unnecessary. Further, in this embodiment, LA
Ethernet is used as N96, but the network method is Apple talk (trade name), Ta.
It goes without saying that the present invention can be applied to a network using ken Ring (product name) or the like, or a system in which the communication program is replaced by the TCP / IP program and is composed of OSI, IPX (product name) or the like. .

According to the first server device having the above-described configuration, when the composition of the data described in the page description language transmitted from the host via the LAN 11 and the image data input by the scanner is instructed, The combining means (main CPU circuit 1 in this embodiment) combines the bitmap data converted by the processing means (main CPU circuit 1 in this embodiment) with the image data from the scanner, and the combined image data is sent via Ethernet. Since the circuit 2 can be transferred to the host side, the data described in the page description language sent from the host and the image data input by the scanner are combined without imposing a burden of expanding resources such as a memory on the host side. The image data can be easily used on the host side.

According to the second invention, the image data synthesized by the synthesizing means (main CPU circuit 1 in this embodiment) is compressed by the compressing means (JPEG compression circuit 3 in this embodiment) and the Ethernet circuit 2 is Since the data can be sent to the host on the LAN 11, it is possible for the server device side to acquire the combined large-capacity combined image data in a short time and easily use it.

FIG. 4 is a circuit block diagram for explaining a detailed structure of a board circuit composed of the main CPU circuit 1, the Ethernet circuit 2 and the JPEG compression circuit 3 shown in FIG.

In the figure, 101 is, for example, IDT79R.
A CPU composed of 3051 (product name) and the like controls the entire board circuit. A real-time OS is mounted on the board circuit. The CPU 101 activates the communication program 83, the entire system control program 93, the scanner control program 85, the PDL interpreter program 84, etc. shown in FIG.

Reference numeral 102 is a main memory, which functions as a work memory for the CPU 101. When the power of the system is turned on, the programs stored in the EPROM 107 and the programs stored in the auxiliary storage device such as a hard disk connected to the SCSI port 112 or the program stored in the host computer on the network are stored in the memory. Downloaded and placed on top. Therefore, the program itself of each process is stored in the main memory 102 and operates here.

A band memory 103 is a band memory capable of accumulating image data for several lines in a raster method.
The band memory 103 is a memory for expanding PDL data into bitmap data. The PDL normally creates bitmap data for one page and then sends the data to the printer engine side.
The method is to divide the page into several bands and develop the bitmap. This is realized by the PDL interpreter program 84 rearranging the PDL data. The bitmap data expanded in the band memory 103 is sent to the printer side. Then, the next band is developed and sent again to the printer side.
By repeating this, printing for one page is performed.

Also, when the image data is read from the scanner side, it is temporarily stored in the band memory. CP
U101 or a network connected to a hard disk connected to the SCSI port 112 or an Ethernet port 114 by reading image data from the band memory 103 using a block transfer function of direct memory access (DMA) not described in this system. Is transferred to the host computer side via.
When the data for one band is transferred, the scan data for the next band width is input again and the processing is repeated.

Reference numeral 104 is a memory access controller,
D for constructing the main memory 102 and the band memory 103
Controls RAM access and refresh.
Normally, a DRAM is accessed by one word (8, 16, 32 bits, etc.), a continuous access of a certain length (page READ, Write), and the DRAM bank is divided and the access is repeated alternately. There are interleaving access methods that are generated by the following methods, and these methods are provided to speed up memory access. However, when the main memory 102 and the band memory 103 are composed of SRAM, the refresh function is not necessary. A memory clear controller 105 clears the data in the band memory 103 at high speed.

The image drawing processing circuit 106 overwrites the image data read from the scanner side by the image drawing processing circuit 106 without clearing the bitmap data expanded in the band memory 103. It is also possible to combine an image obtained by expanding the PDL data transferred from the host side with an image read by a scanner, for example, the copying apparatus (scanner printer) shown in FIG. The image data obtained by combining may be sent to the printer side in the same manner as the bit map data obtained by expanding, or a network connected to the hard disk or Ethernet board 114 like the image data read from the scanner side. 96
The CPU 101 may control so that the data is transferred to the host computer side specified via the. Furthermore, after the combined image data is compressed by the JPEG compression circuit 3,
By sending the color image information to the designated host computer via the network 96, for example, a large amount of color image information can be sent to the designated host side in a short time. As a result, the host side can easily obtain a composite image that cannot be obtained within the installed memory capacity.

FIG. 5 is a block diagram for explaining the detailed structure of the memory clear controller 105 shown in FIG.

In the figure, 201 is an address generator.
Address buffer unit 203 according to the clear start signal
The address to be cleared is output to. A data latch 202 outputs clear data to the data buffer unit 204.

In the board circuit thus constructed (main CPU circuit 1, Ethernet circuit 2, JPEG compression circuit 3), the CPU 101 first transfers the data in the band memory 103 to another storage device or interface. When the transfer is confirmed, the address buffer 203 and the data buffer 204 are enabled. On the other hand, other access means to the band memory 103 are disabled. In the data latch 202, data which is initialization at system startup, for example, "00" is set. CPU 101
A clear start signal is sent to the address generator 201. In response to this, the address generating unit 201 sequentially generates addresses and writes the data held in the data latch unit 202 into the band memory 103 through the memory access controller 104. When the writing for all the memories is completed, the address generating unit 201 sends a clear end signal to the CPU 101 to end the clear operation.

In the clear operation, when the image data in the band memory 103 is transferred to the printer device, the image data of the next band that has been performed is expanded by the PDL interpreter program 84. At that time, the PDL interpreter program 84 performs bitmap expansion only on a necessary part. For example, in the latter half image of the band shown in (1) of FIG. 6 and the expansion of the band shown in (2), only the image belonging to (2) is written. Therefore, (1) in FIG.
However, the image data that has already been transferred remains as unnecessary data. If you do not clear the memory (1)
Image data in which the images shown in (2) and (2) are mixed are written in the band memory 103. Therefore, it is necessary to clear the memory. A memory clear controller 105 hardens the memory clear processing to enable high speed processing.

The image drawing processing circuit 106 is a circuit configured to assist the drawing function of the PDL interpreter program 84 with hardware. The PDL interpreter program 84 draws a line or fills in many figures, which requires a considerable amount of time. For example, the filling processing of the portion surrounded by the figures (1) to (3) as shown in FIG. 7 is executed as shown by the arrow in the figure.

FIG. 8 shows the image drawing processing circuit 1 shown in FIG.
It is a block diagram explaining the detailed structure of 06.

In the figure, reference numeral 106A denotes an address generator, which responds to a drawing start signal by the address buffer 10
The address to be cleared is output to 6C. 106B is a data latch for drawing data into the data buffer section 106D.
Output to.

In the board circuit thus constructed, first, the CPU 101 causes the PDL interprogram 8
If there is line drawing or graphic filling within the current bandwidth from the processing result of 4, the image drawing processing circuit 10
Command to 6. First, the data latch 106B is made to latch drawing data. Next, the start address and the count number (drawing amount for one line) are set in the address generator 106A. However, the count number may be set to an end address. Then, the address buffer 106
C, enable data buffer 106D. On the other hand, other access means to the band memory 103 are disabled. The CPU 101 sends a drawing start signal to the address generator 106A. In response to this, the address generator 106A sequentially generates addresses from the start address value, and writes the data held in the data latch 106B to the band memory 103 through the memory controller 104. When the count number part (end address) is reached, writing to the memory is stopped, a drawing end signal is sent, the next start address and count number are set, and writing to the memory is performed again. When the drawing for the band width is completed, the drawing for the band width is completed.

The drawing operation is intended to be speeded up by hardware like the clearing operation.
The SI may take charge of all the drawing processing, and the assistance of the CPU 101 may be reduced.

On the other hand, in FIG. 4, reference numeral 107 denotes an EPROM which the CPU 101 first accesses when the power is turned on.
The various programs for controlling the system are stored. Note that the EPROM 107 can have the following two storage methods. The first method is to store the program in an executable form as it is, and the second method is to compress the entire program by a reversible compression method and store it in that form. This is a case where the data is rearranged in the main storage memory 102 while being expanded.

However, in the case of the first method,
Since the EPROM 107 is a memory that can be executed as it is, the main storage memory 102 can be saved more than if it is relocated to the main storage memory 102. However, increasing the capacity of the EPROM 107 itself and generally accessing the EPROM 107
Has the drawback of being slow. Further, in the case of the second method, since the entire program is compressed, a large amount of the program can be stored in the EPROM 107, so that the storage capacity of the EPROM 107 can be reduced and the program is relocated on the main memory. Although it has the advantage of high-speed access, it also has the drawback of requiring a large capacity of the main memory 102. Therefore, in this embodiment, the second method is adopted.

Reference numeral 108 denotes an EEPROM, which is a device in which stored data is not lost even when the power is turned off and the data can be rewritten at the time of activation after the power is turned on. Therefore, it is used for storing addresses on the network, setting parameters on the scanner and printer side, and the like. Reference numeral 109 is a clock circuit (RTC), which is capable of adjusting the time and has a power
Even during FF, the time progresses as it is due to the internal battery. This makes it possible to know the real time, which is used as information during scanning and printing.
110 is a timer, which is an interval timer. The program of this system operates as a multi-program, but its management is performed by the real-time OS. The timer 110 uses the interval time of every few milliseconds as a CP.
The U101 is notified and the CPU 110 is assigned to each program by the timer 110 and the priority scheduler.

Reference numeral 111 denotes a SCSI controller, which controls SCSI, which is a standard for peripheral equipment interfaces. Reference numeral 112 denotes a SCSI port, which is a parallel input / output I / F port for connecting peripheral devices. An Ethernet controller 113 connects the system to a LAN 96, which is one type of network, and functions as a control unit for exchanging data. The Ethernet controller 113 has a small buffer memory inside,
The time consistency between the asynchronous CPU and the synchronous network is ensured. The data transferred from the network is stored in this buffer memory, and conversely, when the data is transferred to the network, it is transmitted from here. The Ethernet controller 113 controls electrical timing, data transfer, and transfer. TCP
The control of the / IP communication program 82 is performed by the CPU 101 using the Ethernet controller 113.

The Ethernet port 114 uses a thick coaxial cable 114a as a medium. I / F shape is 1
It is a 5-pin connector. 114b TwistPai
The r-type port has a 4-wire medium. The I / F shape is an 8-pin modular jack. These ports are used to connect to the ace network. 11
5 is an ADCT compression / expansion circuit, which is RGB (RED, GR
Halftone data composed of EEN and Blue (8 for each color)
(Bit) is a circuit for compressing and decompressing (bit) using an algorithm of CCITT standard JPEG system. When compressing the color halftone data read from the scanner, the raw image data read from the scanner is converted to the ADC.
The T compression / decompression circuit 115 is used for compression to reduce the amount of memory. Therefore, the effects such as speeding up of network transfer and reduction of storage memory can be obtained. In addition, the compressed image data transferred via the network is
The data is expanded by using the DCT compression / expansion circuit 115, restored to color halftone data, and written in the band memory 103,
The data is transferred to the printer I / F and printed by the printer device.

A FIFO memory 116 is used to send and receive the compressed image data to the ADCT compression / expansion circuit 115. FIFO memory 116
Is used to absorb the shift in the data transfer timing due to the difference in the data amount between the compressed data and the decompressed data (raw image data) during the compression operation and the decompression operation. 117
Is the RS232C controller part, and the standard serial I /
Control F. 118 is RS232C port, Ac
2 of channel 118a and channel 118b
A port is prepared, and one of them is used for terminal connection, allowing display and keyboard input. The other is for connecting a device having a serial interface. Here, a character printer such as a laser beam printer or a simple scanner can be connected.

In this system, Achannel is used.
Is for terminal connection, and the terminal is connected here to input commands and change parameters.
However, this system also has a pseudo-terminal function, and it can be rlogged in from the host computer on the network.
The same operation as the channel is also possible.

A Centronics I / F controller unit 119 performs I / F control for connecting a printer compatible with the Centronics I / F. Actually, the state of the device at the connection destination (BUSY / non) is confirmed and 8-bit data is output. Data is transferred by repeating this. It also controls signals in accordance with Centronics I / F. Reference numeral 120 denotes a Centronics I / F port, to which a cable is actually connected to establish an electrical relationship with the printer. A VME controller 121 controls the CPU 101 of the present system to access another board conforming to the VMEbus standard.
According to the VMEbus standard, address buses A16, A
24, A32, data buses D8, D16, D24, D3
Two buses can be accessed. The right to use the bus is given by the arbitration method. In addition, control conforming to the VMEbus standard is realized by this circuit. A VMEbus port 122 electrically connects a double-height VMEbus. The VMEbus port 122 is composed of two 6-pin connectors, in which an address bus, a data bus, etc. are arranged.

Reference numeral 123 denotes a reset switch, which is pressed when the system is restarted as a final means when an abnormality occurs in this system. Although the reset switch 123 is a hardware switch mechanism in this embodiment, the reset switch 123 is connected to the terminal connected to the RS232C port 118 or the network via the rlogi.
It may be configured as a program RESET (warm RESET) that is reset by a program from the pseudo terminal that has been reset.

Reference numeral 124 denotes an LED portion, which indicates L when the power is turned on.
LED 12 indicating that the ED 124a and the CPU 101 are executing
4b, LED 124c that allows each program to be turned on freely
Etc. As a result, when the LED 124a is on, the operator can visually confirm that the system is in the hot water state. Also, L
If the ED 124b is on, the CPU 101 is executing, and if the LED 124b is off, CP
The operator can visually confirm that U101 is in the weight state. LED124c that lights up frequently
Allows the operator to visually confirm that some processing is currently being executed, and can identify which program has caused the LED to light, etc., based on the difference in lighting time, interval, number of times, etc. Become.

The data flow in the print request process from the host computer on the network will be described in detail below.

When the host computer connected to the network, that is, the LAN 96 wants to print the data, it sends the data designating the data and the output destination to the SP server system. At this time, if a hard disk is connected to the SCSI port, the data is temporarily stored (spooled) in the hard disk. If there is no hard disk, it is temporarily stored in the main memory 102. There are three data formats to be transferred: (1) to (3) below.

(1) PDL format data (2) Raw image formation data (3) Compressed image formation data Among these, in the case of (1) PDL format data, P
The DL interpreter program 84 is started, bit map expansion for each bandwidth is performed, and the band memory 1
Written in 03. When the data for the band memory is prepared, the data is transferred to the printer side, and the bitmap for the next band width is developed.

On the other hand, in the case of the raw image formation data of (2), the band width data is written in the band memory 103 and transferred to the designated printer side. Then, data for the next band width is prepared. For raw image format,
Because of the large amount of data, not all the data is transferred at once from the host computer side, but divided and sent. Therefore, the work of receiving data from the network is performed even during printing.

Further, in the case of the data of the image compression format of (3), the compressed image data is written in the FIFO memory 116 and converted into raw image data by the ADCT decompression circuit 115. The decompressed data is written in the band memory 103 as much as the bandwidth and transferred to the designated printer side. Hereinafter, the same processing is repeated. The format of the image data may not be a single format but may be composite data in which the above data formats are combined. That is, a combination of the data format of (1) and the data format of (2), or the data format of (1) and (3)
In the case of a combination with the above data format, the above processing is performed respectively.

The I / F of the printer device for transferring the image data is RS232C port 1 when connected via the interface board configured on the VMEbus 122.
Centronics I / F port 12 when connected to 18
Sometimes connected to 0. The destination is determined depending on which I / F the printer connected to by the host computer has printed.

The data on the band memory 103 is cleared by the clear controller 105 when the data transfer for one band width is completed. After that, PDL expansion is performed again, and when the bandwidths are made uniform, the data is transferred to the designated printer-side interface circuit, and the output process is performed by the printer under the control of the interface circuit (control board) by the device driver 86. This is a repetition. When the host computer on the network wants to input image data from the scanner, this system receives the designation information for starting the scanner from the host computer and starts image input. The interface of the scanner device is RS232C port 118 when connecting via the I / F board configured on the VMEbus 122.
May be connected to. This designation is also designated by the host computer.

The image data input from the scanner is stored in the band memory 103 for the bandwidth. When the image data from the scanner is transferred to the designated host computer, the scanner control program 85
Street processing is done.

The first processing is raw image format data, but includes data to which a tag of image information is added, and the second processing is compressed image format data.

If the data processing format is raw image format data, the data on the band memory 103 is
There are a method of sequentially transferring to a designated host computer via a network, and a method of temporarily storing in a hard disk connected to the SCSI port 112. Both are selected by the specified information from the host computer.
Also, when attaching a tag in which image information is recorded, it is added and transferred.

On the other hand, when the data processing format is compressed image format data, the data on the band memory 103 is AD.
The data is sent to the CT compression circuit 115, is compressed, and the compressed data is written to the FIFO memory 116. And
It is read from the FIFO memory 116 and transferred to the host computer, and the processing for the next bandwidth is repeated,
Get compressed image data. In the case of having a hard disk, it is the same as the above except that it temporarily stores it.

The first SP interface circuit 4- shown in FIG. 1 will be described below with reference to the circuit block diagram shown in FIG.
The detailed configuration of No. 1 will be described.

FIG. 9 is a block diagram for explaining the internal structure of the first SP interface circuit 4-1 shown in FIG. 1. The same parts as those in FIG. 1 are designated by the same reference numerals.

In the figure, 1000 is a CPU, and ROM
Based on the various control programs stored in 1002, each device connected to the internal bus 1001 of the board circuit is controlled. A RAM 1003 functions as a work memory of the CPU 1000. A network controller 1004 controls access to a station connected to the LAN 96. A band memory 1005 stores data for the band width. A standard compression / expansion unit 1006 compresses / expands image data. A SCSI controller 1007 is connected with a hard disk 1008 and the like.

Reference numeral 211 denotes a CPU which controls the first SP interface circuit 4-1 as a whole, and is connected to the board internal bus based on a control program (a program supplementing the device driver 86) stored in the ROM 212. While controlling each device, it performs initial settings of each unit and exchanges commands with the scanner and printer. Two
A RAM 13 functions as a work memory or the like of the CPU 211. Reference numeral 214 denotes a DPRAM, which is a RAM for exchanging commands between the first SP interface circuit 4-1 and the board circuit, and is configured so that both the CPU 211 of the board circuit and the CPU 1000 of the board circuit can independently perform memory access via the CPU 211 and the VME bus 16. ing. Buffer memories 215 and 216 function to avoid collision between the CPU 211 and the CPU 1000.

Reference numeral 218 denotes a real-time compression / expansion unit for compressing / expanding multi-valued image data in real time.
Here, the real time means the video interface 22.
The speed of image data input through 0, for example, about 15
This means that processing is performed at the same time as the speed of exchanging image data at MHZ (32 bits). Compression memory 17
Stores the data compressed by the real-time compression / expansion unit 218. Reference numeral 219 denotes a line buffer, which functions as a memory for storing 8-line raster direction data. The line buffer 219 can be randomly accessed from the real-time compression / expansion unit 218 in an 8 × 8 matrix in accordance with ADCT compression. A DMA controller 217 is for moving data between the compression memory 17 and the real-time compression / decompression unit 218 without passing through the CPU 211.

The video interface 220a is an interface with the scanner 94A and the printer 94B.
220b is a control interface.

In the server device thus configured, the first compression / expansion unit (standard compression / expansion unit 1006) compresses / expands image data via the first storage unit (hard disk 1008), Control means (CPU 100
0) transfers the image data while controlling the communication on the network 96 or the communication with the second control unit (CPU 211), and the second control unit synchronizes the image data with the image data transfer rate of each input / output device. A second compression / expansion unit (real-time compression / expansion unit 218) that compresses / expands image data via the second storage unit (compression memory 17) capable of reading and writing image data.
Since the compression / expansion of No. 9 is controlled, the input / output processing of the compressed / expanded image data can be performed at a speed commensurate with the image data transfer speed of each input / output device even if the storage medium has a limited capacity.

The first to fourth mode processes based on the designation information from the host computer will be described in detail below with reference to FIG. In addition, each mode process is performed by the ROM 100.
Image input / output device control program 85 and R stored in
This is performed by executing the device driver 85 stored in the OM 212. [First Mode Processing] First, in the first mode processing (image print mode processing), the raw image data in the band memory 1005 of the main CPU circuit 1 is received via the VME bus 16 and the real-time compression / decompression unit is received. After being compressed in 218, it is temporarily stored in the compression memory 17 in the form of a compressed image. This operation is performed for one page, and when the compression for one page (one screen) is completed, the printer 94
Start B. Next, the DMA controller 217 reads the compressed image data temporarily stored in the compression memory 17 in the form of a compressed image, and sends it to the real-time compression / expansion unit 218. At this time, the decompression circuit restores the raw image data. The decompressed raw image data is sequentially transferred from the video interface 220 to the printer 94B. At this time, the image decompression operation is performed at a very high speed in synchronization with the data processing speed of the printer 94B. In some cases, the image processing is performed and then the data is sent to the printer 94B to perform the printer processing. [Second Mode Processing] In the second mode processing (image scan mode processing), image data input from the scanner 94A via the video interface 220a is compressed in real time at ultra-high speed in synchronization with the speed. Image compression is performed using the compression function of the decompression unit 218, and D
The MA controller 217 temporarily stores the output compressed image data in the compression memory 17. When the scan for one screen is completed, the CPU 1000 of the board circuit
Again expands the compressed image data stored in the compression memory 17 by the expansion circuit of the real-time compression / expansion unit 218,
Return to raw image data. The raw image data is sent to the board circuit via the VME bus 16. The board circuit is
When the host computer side requests raw image data, it transfers it to the specified host computer as it is, and when it requests compressed image data, it is designated by compressing it by the compression function processing on the board circuit. Transfer to host computer. [Third Mode Processing] In the third mode processing (standard compressed image print mode processing), when the board circuit receives the compressed image data from the host computer on the network, the board circuit designates the compressed image data as it is without decompressing it. Sent to the first SP interface circuit 4-1. The first SP interface circuit 4-1 stores the compressed image data in the compression memory 17, and then the designated printer 94.
B is activated, and the compressed image data is expanded and printed in synchronization with the print speed of the printer 94B by the expansion function of the real-time compression / expansion unit 218. [Fourth Mode Processing] In the fourth mode processing (standard compression image scan mode processing), image compression is performed by the compression function of the real-time compression / expansion unit 218 at an extremely high speed in synchronization with the scanning speed of the scanner 94A, and compression is performed. The compressed image data is temporarily stored in the memory 17. When the scan for one screen is completed, the CPU 1000 of the board circuit takes in the compressed image data as it is via the VME bus 16.

In the first and second mode processes, raw image data is used for the first SP interface circuit 4-.
In order to interface with 1, the standard compression / expansion processing required for image communication is not necessarily performed in the first SP interface circuit 4-1, and the original compression according to the speedup and other purposes is required. Can be extended.

In the second and fourth mode processing, the case where the read data of the scanner 94A is directly compressed is described, but the read data of the scanner is subjected to image processing such as linear density conversion and color space conversion. The real-time compression / decompression unit 218 may apply image compression later, without limitation. Further, the image processing function may be provided between the image compression / expansion unit and the scanner 94A / printer 94B, or the image compression / expansion unit may be provided in the scanner 94A.
A, the configuration may be provided in the printer 94B.

The configuration and operation of the real-time compression / decompression unit 218 will be described below with reference to the block diagram shown in FIG.

FIG. 10 is a block diagram showing an example of the detailed structure of the real-time compression / expansion unit 218 shown in FIG. 9. In particular, in this embodiment, the ADCT method is adopted as the compression / expansion method.

At the time of data compression, the raw image data is first stored in the external line buffer 219 and then input to the color space conversion unit 221 to convert the RGB data into Y, Cr, and
Converted to a color space such as Cb. Then, in some cases, Cr and Cb are sub-sampled as color difference components to reduce the redundancy of the image. Next, every 8 × 8 pixels, the DCT calculation unit 222 transforms the frequency space. Next, as shown in FIG. 11, the DCT coefficient is scanned by the zigzag scanning unit 223 and quantized by the quantization unit 224. At this time, the quantization coefficient is stored in the quantization table 225 and corresponds to the DCT coefficient of 8 × 8. Next, the internal FIFO memory 22
6 is stored once, and the compressed image data obtained after being encoded by the Huffman encoding unit 227 by referring to the Huffman table 228 at a desired timing is stored in the CODEC register 2 which can be accessed from an external host computer or the like.
The value is stored in 29.

By the way, the color space conversion unit 221, the DCT calculation unit 222, the zigzag scanning unit 223, and the quantization unit 22.
4, the quantization table 225 and the like constitute a pipeline operation unit, which operates in synchronization with a clock for timing generation and operates at high speed. In addition, the Huffman encoding unit 227,
The Huffman table 228, the CODEC register 229, and the like constitute an asynchronous operation unit, and the external CPU operates in synchronization with the speed of accessing the CODEC register 229. The part that doesn't work very fast. Further, the pipeline operation unit is the scanner 94.
A, high-speed operation is possible so as to follow the image transfer clock of the printer 94B. Therefore, the internal F
The IFO memory 226 is provided for buffering the operation speed of the synchronous pipeline operation unit and the asynchronous operation unit.

Further, if the compression rate is lowered to improve the image quality, the amount of compressed data increases, the processing amount of the asynchronous operation unit increases, and the processing speed of the asynchronous operation unit cannot keep up.
However, the interface of the raw image data of the color space conversion unit 221 can be connected to other than the scanner 94A and the printer 94B, and an external FIFO memory can be provided to receive an asynchronous access from the CPU or the like. It is possible to operate the pipeline operation unit at a low speed or suspend it. Therefore, the asynchronous operation unit has no problem in speed.

Further, in the present embodiment, a plurality of (for example, two) image compression / decompression units are provided, and the raw image data is divided into a plurality of parts,
By giving each image compression / expansion unit, it becomes possible to connect to a scanner, printer or the like that operates at high speed. In this way, if the image data divided into a plurality of pieces is compressed, the speed problem is also solved at the time of decompression.

Although the operation at the time of decompression is basically the reverse process at the time of compression, as shown in FIG. 10, when the compressed image data is passed to the CODEC register 229,
The Huffman coding unit 227 performs inverse Huffman coding, that is, decoding with reference to the Huffman table 228. The value is inversely quantized by the quantizer 224 while being temporarily buffered by the internal FIFO memory 226. The inverse quantization is performed by multiplying the 8 × 8 quantization coefficient of the quantization table 225. Then, the zigzag scanning unit 223 performs an inverse zigzag scan, and the result is passed to the DCT calculation unit 222 as a DCT coefficient. Then, in the color space conversion unit 221, Y, Cr, Cb which are compressed color spaces are used.
The original RGB space or the like is returned.

Further, in the DCT calculation section 222, the DCT calculation and the inverse DCT calculation are processed by the same circuit only by exchanging the calculation parameters. Even in the color space conversion unit 221,
When the conversion is linear linear conversion or the like, the conversion can be similarly performed by parameter conversion.

Further, the quantizing unit 224 is also the same, and quantization is division and the like, and inverse quantization is multiplication. However, division is also multiplication because it has a reciprocal quantized coefficient.
Compression and decompression are possible with the same circuit. Hereinafter, the first SP interface circuit 4- will be described with reference to FIGS.
The operation of each mode 1 will be described in more detail.

FIG. 12 is a block diagram for explaining the outline of the part structure of the first SP interface circuit 4-1.

In the figure, reference numeral 1100 is an image processing control unit, which is a VME bus interface, an image compression / decompression unit, a CP
It is composed of a U circuit section and the like, and details are shown in FIG. 13 described later. Reference numeral 1200 denotes a connection memory control unit, which will be described later with reference to FIG.
Details are shown in. An image input / output control unit 1300 is a color laser copying apparatus (CL having a scanner and a printer).
C), a bubble jet color copying apparatus (BJC) equipped with a scanner and a printer, and controls I / O. Details are shown in FIG.

13 to 15 show the first S shown in FIG.
FIG. 2 is a circuit block diagram illustrating a detailed internal configuration of a P interface circuit 4-1 and the same components as those in FIG. 1 are denoted by the same reference numerals.

In the processing for the right side of the data obtained by dividing the screen into two by the CPU 1000 of the board circuit shown in FIG. 9, the image data is the VME interface 301.
First, the data is buffered in the FIFO memory 302 in the buffer 30.
Written via 3. The data is temporarily stored in the SRAM 305 via the buffer 304 rather than the FIFO memory 302. The operation of the SRAM 305 operates in synchronization with the pipeline unit of the image compression / decompression unit. When data for eight lines in the vertical direction of the image is stored in the RAM 305, the image compression / expansion unit 306 causes the horizontal and vertical 8 × 8 units to be stored in the SRAM 305.
The data is read out and operated, and the obtained compressed data is sequentially written in the DRAM 308 via the DMA controller unit 307. At this time, the DMA controller unit 307 operates the address counter 309 to generate an address, or counts up the address and outputs the DRAM to the DRAM via the selector 310.
Give to 308. In the third mode, the CPU 1000 of the board circuit gives an address via the VME interface 301 and the selector 310, and updates the data with the DRAM 308 via the interface conversion unit 312. As a result, it is possible to directly send the compressed data to the DRAM 308, and it is also possible to handle standard compressed data in which the screen is not divided into left and right. However, it is not suitable for data with a low compression rate.

Further, DRAM 308 is constantly refreshed by refresh circuit 313 to maintain data. Next, the operation of outputting the data in the DRAM 308 to the printer 94B will be described. When the data is read from the DRAM 308 to the compression / expansion unit 306 by the DMA controller 307 under the same control as when writing, the data is expanded and the raw data is buffered. FIFO from 304
The output data from the memory 302 is applied to the latch 315 by selecting either the left or right side of the image by the selector.

Next, the gamma conversion section 325 performs gamma conversion and LOG conversion. Then, in the masking circuit 316, C
Masking for G is performed, and with the masking circuit 317,
Masking for a natural image is performed, and either one is selected by the selector 321 according to the property of the image, finally converted by the output gamma adjustment unit 322, and then output to the printer 94B via the line driver 324. At this time, the output gamma adjustment unit 322 is adjusted by the gamma setting register 323. The masking circuit 316 is composed of a ROM,
The masking circuit 317 is a logic, and is connected to a black table for generating black, and the initial value data R
The timing controller 320 is also connected to the periphery so that the value of the OM 319 is initially loaded. When the printer 94B is frame sequential, the expansion operation is performed by the number of planes, and the masking circuits 316 and 317 perform masking processing according to the output color.

The above is the processing flow for the right side when the screen is divided into two, and the same processing flow is performed for the left side. That is, the 8-line image data stored in the SRAM 328 via the buffer 325, the FIFO memory 302, and the buffer 327 is converted into the image decompression unit 329.
Is compressed, and is controlled by the DMA controller 331, the address controller 335, and the selector 334, and is written in the DRAM 332 as compressed data. It goes without saying that the CPU 1000 of the board circuit may directly write compressed data from the VME interface 311 to the selector 334 via the interface conversion unit 330. In addition, the refresh circuit 3
33 refreshes and maintains the data in DRAM 332. Then, at the time of image printing, the data read from the DRAM 332 is controlled by the control 331 such as the DMA controller 331 and expanded by the image compression / expansion unit 329, and the SRAM 328 and the buffer 32.
7, is given to the selector 314 via the FIFO memory 326, and is image-processed and outputted as described above.
The processing of mode 1 is performed as described above.

Next, the second mode processing operation will be described.

The image data sent from the scanner 94A after undergoing various processes is received by the line receiver, and the right side of the image is buffered by the buffer 341 in the buffer 342.
As a result, the left side of the image is sequentially loaded into the FIFO memories 303 and 326. After that, the same operation as in the first mode is performed. That is, describing the processing operation on the right side, the image data written in the FIFO memory 302 is read out and written in eight lines in the SRAM 305 via the buffer 304. Next, the compression / expansion unit 306 generates compressed data in the DRAM 308.

On the other hand, in the fourth mode, the CPU 1000 of the board circuit can directly read the compressed image data via the VME interface 311 and the interface conversion unit 312 and the selector 310, but in the second mode, the DRAM 308. Decompresses the compressed data, and passes it to the CPU 1000 of the board circuit. The compressed image data read from the DRAM 308 under the control of the interface conversion unit 312, the DMA controller 307, the address counter 309, and the selector 310 and read in the written order is expanded by the image compression / expansion unit 306, and stored in the SRAM 305 in 8 × 8 units. It is written every time, and when all 8 lines are written, it is continuously read in the horizontal line direction via the buffer 304, and the FIF is read.
It is written in the O memory 302. FIFO memory 302
Then, according to the timing of the CPU 1000 of the board circuit, it is read as raw image data by the CPU 1000 of the board circuit via the buffer 303 and the VME interface 301.

By the way, when the selector 321 selects the two masking circuits 316 and 317, the RAM 35 is used.
The attribute indicating whether there is a CG image or a natural image in 1 is written, the address of the processing pixel position is generated from the horizontal counter 352 and the vertical counter 353, and is given to the RAM 351 via the selector 355. , The selector 321 is controlled by the read data. Therefore, the attribute on the RAM 351 is the CPU 100 of the board circuit.
It is written in advance from 0 to the RAM 351 via the VME interface 301 and the selector 351. The interface with the scanner 94A and the printer 94B is controlled by the S / P timing controller 356.

Next, the control for switching the left and right sides of the image will be described.

The vertical direction counter 363 sends an image effective signal for an effective part of the image in the vertical direction.
The delay register 364 sets a blank portion at the tip of the image. The length register 361 sets the effective length of the image, and if the comparator 362 is within the effective length, it sends an image effective signal to each part. In addition to the vertical image valid section, a delay register 366 for setting the horizontal margin length is connected, and the valid signal is issued after counting the left edge of the image. In response to this, the counter controller unit 367 activates the horizontal left width counter 368. The horizontal left width counter 368 functions as a down counter, counts by the width, and issues an enable signal for the left screen in the meantime. When the left screen ends, the enable is issued to the counter controller unit 372, the counter controller unit 372 counts the width by the width counter 373 on the right screen, and gives the end state to the control unit 389. The control unit 389 notifies the selector 314 of the end of the effective image width and clears the output.
The width counter 368 generates a write pulse generator 369 in the left screen effective width at the time of compression so that the multiplexer 3
The scanner data on the left side is written into the FIFO memory 326 via 71, and the FIFO memory 326 receives the gate 381.
The read pulse of the compression / expansion unit 329 is given to the FIFO memory 326 via the multiplexer 371.

At the time of decompression, the read pulse generator 370 receives the left side effective signal of the width counter 368 and the FIFO memory 32 via the multiplexer 371.
6 to output to the printer 94B.

On the other hand, the write pulse of the image compression / expansion unit 329 is applied to the FIFO memory 326 via the gate 381 and the multiplexer 371, and the expanded data is written.

It goes without saying that the write pulse generator 374, the read pulse generator 375, the multiplexer 376, and the gate 382 operate similarly on the right side. Further, the image compression / expansion unit 329 is provided with the state of the internal FIFO memory 302 to the start / stop logic 386, and the register 385 for detecting the peripheral state is also provided with the start / stop logic 3.
86, and the state of the external FIFO memory 326 is also provided to the start / stop logic 386 via the FIFO memory controller 383, and the internal FI
The FO memory 302 and the external FIFO memory 326 are managed so as not to overflow or underflow, and the pipeline unit 329 of the image compression / expansion unit 329 can be stopped or started depending on the state. .

Similarly, status register 387, start / start
Stop logic 386, Fiho controller unit 384
The pipeline section of the compression / expansion section 306 is started or stopped. In start / stop, when the internal pipeline part is too fast during compression and the internal FIFO memory 302 is likely to overflow, or when the internal pipeline part is too fast during decompression, the internal FIFO memory 302 is likely to underflow. When the image compression / decompression unit is too fast during other compression, the external FIFO memory 326 is likely to underflow, and when the image compression / decompression unit 306 is too fast during decompression, the external FIFO memory 3 is too fast.
There are times when 26 is about to overflow.

The error countermeasure 399 is the scanner 94.
When the processing speed of the image compression / expansion unit 306 cannot keep up with the A and printer 94B being too fast, the external FIFO memory 3
26 and the internal FIFO memory 302 cause overflow or underflow, so that the video signals (video = image) on the scanner 94A and printer 94B sides are temporarily stopped. In the scanner 94A, video is discarded in line units. The printer 94B performs simple error processing so that the blank space is output in units of one line, and the FI
Prevents FO memory from overflowing or underflowing and corrupting the video stream. Therefore, when the error countermeasure unit passes the error information to the control unit 388, the control unit 389 recognizes the blank space of one line, the effective portion of the left surface, and the effective portion of the right surface to cancel the error at the break of one line. While outputting to 399, when there is an error, the scanner 94A,
The respective units are instructed to clear the input / output data of the printer 94B, and the image compression / decompression unit 3 is operated during error processing.
Even if 06 does not meet the processing speed of the scanner 94A and the printer 94B, the compression or expansion operation is performed up to the division of one horizontal line. This makes 1
The error can be recovered again by separating the lines. However, in the compression during error processing, the white line is compressed to increase the compression speed, and in the expansion, the image data is printed by the printer 94B.
It is thrown away because it is too late.

In the above description, the CPU of the board circuit
Although it has been described that 1000 manages almost all, in the present embodiment, the first SP interface circuit 4-
1 also has an internal CPU 392, and the first S
What can be processed by the P interface circuit 4-1 can be shared by the internal CPU 392.
Further, the first SP interface circuit 4-1 has a dual port RAM 393, and both ports have V
C of the board circuit through the EM bus interface 311
PU1000 has internal CPU3 via internal CPU bus
It is connected to 92. This dual port RAM39
3 through the CPU 1000 of the board circuit and the internal CP
Information is being transmitted to U392.

Therefore, the first SP interface circuit 4
Two CPUs 1000 and C to the VME bus in -1
Access from the PU 392 does not conflict. At this time, the bus conversion unit 394 connected to the internal bus of the CPU 392 interfaces with the image compression / decompression units 306 and 329. The bus conversion unit 394 has the same function as the interface conversion units 312 and 330, and interfaces with various registers on the board via the register interface 395. Therefore, the bus conversion unit 394 also has a function as an interface of the VEM bus. Have

Further, the internal CPU bus is connected to the CPU3.
It has a ROM 391 for storing the program of 92 and a serial communication unit 390. A command for controlling the operation of the scanner 94A and the printer 94B is sent to the serial communication unit 390. Therefore, in this embodiment, the CPU 1000 of the board circuit shown in FIG. 9 is the internal CPU 39 shown in FIG.
2 to control the scanner 94A and the printer 94B, or the CPU 1000 of the board circuit directly
A, the printer 94B is controlled. The control commands include a state detection command and a state setting command, as well as start commands for the scanner 94A and printer 94B as execution commands. The status detection command includes many commands such as the presence / absence of the paper of the printer 94B, the size of the presence / absence of the cassette, the remaining amount of toner, and the occurrence of jam, and the currently set operation mode, that is, single color / 3 color / 4 color. And resolution, and detection of other image processing parameters. The same applies to the scanner 94A, with other originals on the original table /
It is possible to know that there is no light or the lamp is out.

On the other hand, the status setting command is the printer 94.
In B, cassette size selection, cassette upper and lower stage selection, operation mode, print number setting, image processing system parameter setting, and the like.

The same applies to the scanner 94A.
For example, there are variable magnification setting, binary / multi-valued setting, standard color space conversion, unique color space conversion, line density (resolution conversion), area designation setting, gamma conversion setting, and the like.

In this embodiment, since the scanner 94A has many image processing functions, the first SP interface circuit 4-1 performs compression without performing image processing. Also, the data is received as RGB data from the scanner 94A.

On the other hand, the input of the printer 94B is CMYK input and the printer section does not have much image processing. Therefore, masking, gamma conversion, LOG conversion, and CMYK input are performed.
The generation is configured to be processed on the first SP interface circuit 4-1.

FIG. 16 is a block diagram for explaining the detailed configuration of the second SP interface circuit 4-2 shown in FIG. 1. The bubble jet type scanner printer 95 (printer 95B, scanner 95A) shown in FIG. Interface with the S / P server device SP1.
The second SP interface circuit 4-2 is integrally configured as an interface board.

In the figure, reference numeral 401 denotes a CPU, which receives and interprets a command from a board circuit connected to a VEM bus via a dual port RAM 403,
Of the SP interface circuit 4-2. C
PU401 is set to 2 by the built-in interval timer.
An interrupt is generated every ms to communicate commands with the bubble-jet type printer 95B and scanner 95A. Also, various parameters of the image processing circuit units 404, 405, 406 are initialized and changed.

Reference numeral 402 denotes a program ROM, which is a CPU
Control program executed by 401 (device driver 8
6) and the initial values and preset values of the image processing circuit units 404, 405, and 406.

The dual port RAM 403 is the CPU 40
1 which functions as a work area and the like, and a CPU 1000 of a board circuit connected by a VEM bus,
By accessing from both of the CPUs 401, communication between them is performed.

The image processing circuit unit 404 is configured as an image processing ASIC and performs gradation conversion by a look-up table. For example, when converting RGB data into CMYK data, LOG conversion is performed. This is ROM4 beforehand
This is achieved by preparing a conversion table in 02 and transferring it to the RAM in the image processing circuit unit 404.

The image processing circuit unit 405 is an ASI for image processing.
It is configured as C and performs gradation conversion by a 4 × 5 matrix operation and a lookup table. By this matrix calculation, the CMY after conversion of the RGB space of the sensor characteristic of the scanner 95A and the NTSC-RGB color space as the standard color space or the conversion of the image processing circuit unit 404.
Conversion from (K) to CMYK that matches the characteristics of the printer 95B (called masking processing) is performed. In addition, the look-up table allows you to adjust the color balance. Similar to the image processing circuit unit 404, various tables are prepared in advance for these processes, stored in the ROM, and selected and set according to the purpose.

The image processing circuit unit 406 is an ASI for image processing.
It is configured as C and binarizes the data. In addition,
The binarization algorithm in this embodiment adopts the average density preservation method. A serial / parallel conversion unit 407 converts 8-bit parallel data from the CPU 401 into serial data for communication with the scanner 95A and the printer 95B.

Reference numeral 408 is an image DRAM. It is an image memory having a size adapted to a band format adapted to the number of pixels of the head of the printer 95. In the scanner 95A or the printer 95B, data flows according to the image clock during one scan, and the operation cannot be stopped. Therefore, buffering in the size of one band is necessary. Therefore, one band of image data scanned by the scanner 95A or printed by the printer 95B is buffered.

Further, scanning format conversion between raster format access from the VMEbus side and vertical access from the scanner 95A and printer 95B is performed.

409 is an address selector for the DRAM,
Access to DRAM 408 is VE with multiplexer
There are two from the M bus side and from the scanner 95A and printer 95B side, and the addresses are switched from these. Further, since the address to the DRAM 408 is separately supplied to the ROW address and the COLUM address, this multiplexing is performed.

Reference numeral 410 denotes a DRAM timing controller section. DRA such as RAS, CAS, WE, OE
Produces a signal that controls M. It also arbitrates with the refresh signal.

Reference numeral 411 denotes a timing circuit, which is the scanner 95.
A, the timing of access to the printer 95B is generated. This is a part that creates the access timing based on the image clock and the synchronization signal from the scanner 95A and the printer 95B.

Reference numeral 412 is a refresh timing control section. The timing for refreshing the DRAM 408 is created. The access gap between the scanner 95A and the printer 95B is used so that the access between the scanner 95A and the printer 95B does not collide.

Reference numeral 413 is a VME timing control section.
Processes control signals for access from the VME bus. AM code decoding, upper address decoding,
For example, interrupt processing.

Reference numeral 414 is a scanner 95A and a printer 95B.
Access address generator. Since the access of the scanner 95A and the printer 95B is different from the normal raster format, a special access address for the scanner 95A and the printer 95B is applied to the memory written in the raster format for the access from the VME bus. Is the part that generates. This is the size of the band, and the vertical and horizontal directions in the scanning direction are turned over.

Reference numeral 415 is a VME bus interface data buffer section. Image data is accessed with a 32-bit width and commands are accessed with an 8-bit width.

Reference numeral 416 is a VME bus interface address buffer unit. Image data is accessed in a 24-bit address space, and commands are accessed in a 16-bit address space.

Reference numeral 417 is a buffer for a portion other than the VME bus interface data and address.

Reference numeral 418 is a buffer at the entrance of the image processing section. The access from the VME bus and the access to the DRAM are performed with a width of 32 bits, but the image processing unit performs processing with a width of 8 bits. Therefore, 32-bit R, G,
The data of B and X is converted into 8-bit data, and R, G, B,
Serial conversion is performed in the order of X.

Reference numeral 419 is a buffer at the exit of the image processing unit.
Contrary to the buffer 418, conversion is performed by collecting data lines of 8-bit width, which change in color sequence, for four colors into 32 bits.

Reference numeral 420 is a buffer after the binarization processing, and the data binarized by the image processing circuit unit 406 is 1 bit. This is extended to 8 bits. That is, "0" is set to "0x00" and "1" is set to "0xFF".

Reference numeral 421 denotes a buffer, which is an image processing circuit section 40.
In the buffer for bypassing the binarization processing by 6, the buffer 420 or the output of this buffer 421 is selected to switch between binary and multi-valued.

Reference numeral 422 denotes a scanner 95A and a printer 95B.
Is a buffer of the communication unit of the interface.

Reference numeral 423 is a scanner 95A and a printer 95B.
Is a buffer for input data of the interface.

Reference numeral 424 designates a scanner 95A and a printer 95B.
Is a buffer for output data of the interface.

Reference numeral 425 is a scanner 95A and a printer 95B.
This is an input buffer for the clock and control signals of the interface.

Reference numeral 426 denotes a scanner 95A and a printer 95B.
Is an output buffer for the interface clock and control signal. Reference numeral 429 is a clock input line.

Reference numeral 430 is a 32-bit image data bus,
431 is a 24-bit address bus, 432 is an 8-bit image data bus, 433 is an 8-bit image data bus, 434 is a 16-bit local address bus, 43
Reference numeral 5 is an 8-bit local data bus. The print operation of the printer 95B will be described below. <Operation during printing> First, when various parameters for printing are written in the dual port RAM 403 from the board circuit through the VME bus, the CP
The U401 reads out this data, interprets it, and controls it. For example, for printing RGB data, the CPU
Reference numeral 401 sets a through characteristic table that does not cause a change in the LUT data of the image processing circuit unit 404, and NT is set in the matrix coefficient table of the image processing circuit unit 405.
A coefficient for conversion from SC-RGB to BJ-RGB is set, and the gates of the buffers 420 and 421 are controlled so that the binarization processing of the image processing circuit unit 406 is passed.

Further, parameters such as data size are set. Parameters such as data size are sent to the printer 95 through the parallel / serial conversion unit 407.
It is transmitted to B. Next, the image data for one band is VM
It is transferred from the board circuit to the memory 408 through the E bus. At this time, the data is stored in the RGBX data format by 32-bit access from the VME bus. R is RED, G
Is green, B is image data of each color component of BLUE, and X is control data including information for black characters. Next, a command for printing operation is transmitted via the dual port RAM 403. The CPU 401 sends a print operation start command to the printer 95B. When the start signal is returned from the printer control unit of the printer 95B, access to the timing generation unit 411 memory 408 is started. At this time, the data is read by the printer 95B.
Since the direction is along the BJ head, the address generator 41
Reading is performed according to the address generated by 4. The data read from the memory 408 is the buffer 4
At 18, the R, G, B, and X are converted into 8-bit data in that order and the image processing unit is entered. The image is processed according to the preset parameters, the NTSC-RGB data is converted into the RGB color space used inside the printer 95B, and is transmitted to the printer 95B through the buffer 421 and the interface 424. When the processing of the data for one band is completed, the data of the next band is received via the VME bus and the above operation is repeated. When the predetermined number of processes are completed, the process for one page is completed. The document reading operation of the scanner 95A by the control program stored in the ROM 402 will be described below. <Operation during scanning> First, various parameters for scanning are written in the dual port RAM 403 from the board circuit through the VME bus. CPU
401 reads and interprets this data, and controls. For example, with binary data of RGB, 1024 × 102
If the scan is performed from the position of 512 × 512 with the size of 4, the CPU 401 sets the table of the through characteristic in the LUT of the image processing circuit unit 404, and the image processing circuit unit 4
Coefficients for conversion from BJ-RGB to NTSC-RGB are set in the 06 matrix coefficient table, and the buffer 4 is passed through the binarization processing of the image processing circuit unit 406.
Control the gates of 20,421. Further, the size of the image to be scanned is set to 1024 × 1024, and the scanning start position is set to 512 × 512. These parameters are transmitted to the scanner 95A through the parallel / serial conversion unit 407. Next, the CPU 401 causes the scanner 95
Send a scan start command to A. Scanner 95
The image data input from the scanner reading unit of A is image processing circuit units 404, 40 through the interface 423.
5, 406 is input. Here, image processing is performed using the preset parameters, and the RG is set by the buffer 419.
It is stored in the memory 408 as BX 32-bit format data. At this time, RGBX data is stored in the memory 408, but since the binary image of RGB is scanned in the setting of this example, X is meaningless data, and each component of R, G, and B is Although it is binary data, 1 pixel 1
It is a byte. This is done in a board circuit in a general format required by a binary image, for example, packing 1 byte of 8 pixels and arranging RGB in raster line order. The image data in the memory 408 is transferred to the board circuit via the VME bus interface 415. The above processing is repeated for the number of bands, and the operation of one scan is completed.

The image data processing of the scanner 94A and printer 94B shown in FIG. 1 will be described below.

In this embodiment, the scanner 94 shown in FIG.
Since the color image copying apparatus is integrally formed with A and the printer 94B, it has only one image processing function. When the scanner 94A and the printer 94B are separated, only one of them is provided for each processing. It is not configured. Moreover, most of the image processing functions are provided in the scanner 94A, and the printer 94B mainly has a variable magnification, area designation, color space conversion, gamma conversion, color masking processing section, and the like.

Since the scanner 94A has a color space conversion section, a color masking processing section, etc., it can be used as a standard RGB (NTSC RGB
Etc. are prepared, and RGB data can be obtained in dot sequential or parallel simultaneous. Therefore, since the printer 94B does not have an image processing unit, C, M, Y,
Data must be given in K, and after external conversion to C, M, Y, black (K) generation, color masking processing, and other image processing such as resolution conversion and trimming, video Must be sent to the interface. Moreover, in that case, C, M, Y, and
The image must be transmitted by repeating K4 times. In addition, neither the scanner nor the printer can stop or stop its operation.

Others The video interface includes a horizontal synchronizing signal, a vertical synchronizing signal and a video clock to synchronize with the video data. Further, since it also has status information such as power ON / OFF of the scanner and printer, it can be confirmed from the outside. It also has a function of performing serial communication in the command interface, which allows the scanner 94A and the printer 94B to detect and set the status of the scanner 94A and the printer 94B.
It is possible to issue an execution command or the like for starting the.

The operations of the scanner 95A and printer 95B will be further described below with reference to FIGS. 17 and 18.

FIG. 17 is a schematic diagram for explaining the image recording process of the scanner / printer 95 shown in FIG.

In the figure, 101R represents a document to be scanned, and 102R represents a sheet to be printed. These are, for example, A4 size. Reference numeral 103R represents a sensor head of the scanner, and 104R represents a printer head. The head 104R of the printer has nozzles for ejecting ink arranged in line by a bubble jet method.
It is composed of 28 nozzles.

On the other hand, the sensor can output data of 144 pixels, for example, so that more than 128 pixels can be scanned. In the case of color, these heads are arranged so that the scanner sensor has three RGB colors and the printer head has four CMYK colors. An image processing unit 105R processes an RGB signal input from the scanner sensor and sends it as a CMYK binary signal having characteristics matched to the printer head.

The image processing unit 105R can exchange 8-bit data for each color of RGB from the interface unit 106R in the middle of the image processing system with the outside. In the scanner / printer 95B, the sensor of the scanner 95A and the head of the printer 95B move in synchronization, and the image processing unit 105R
Has a pipeline structure, it is processed without having a large capacity image memory. Therefore, the scanning format of the data exchanged by the interface 105R is special. 107R is an external device.

FIG. 18 is a schematic diagram showing a document scanning state of the scanner 95A of the scanner / printer 95B shown in FIG.

In the figure, 201R indicates the movement of the head. The head itself moves in the lateral direction (main scanning direction) with respect to the document (paper), and the pixels of the sensor are arranged perpendicular to this. Therefore, the data 203R are arranged. On the other hand, in the general raster scan format, the data 204
Line up like R.

FIG. 19 is a schematic diagram showing a band document scanning state of the scanner 95A of the scanner / printer 95B shown in FIG.

In the figure, 301R indicates one page,
302R shows the 1st segment and 303R has shown the 2nd segment. In the image output from the scanner sensor and binarized through the image processing system, an image larger than the segment 305R, such as the segment 304R, is handled, and processing is performed by overlapping the width 306R.

An example of a printer that can be controlled by the S / P server device shown in this embodiment will be described below with reference to FIGS.

The printer that can be controlled by the S / P server device shown in this embodiment is a printer that can use the Centronics interface. The Centronics interface is a standard developed by Centronics, Inc. for use in its own printer for sending data from a computer to a printer, and it is possible to send inexpensive and high-speed data. Most current printers are based on this Centronics.

As shown in FIG. 20, the data transmission of Centronics is performed by DATASTROBE signal, ACKNOWL.
This is performed by three control lines for the EDGE (ACK) signal and the BUSY signal and the DATA line.

Here, the DATASTROBE signal is D
The ATA line indicates that data has been output. BUSY
The signal indicates that the printer is currently operating and is not ready to receive data, or the data buffer is full.

The ACK signal indicates that the reading of data has been completed normally.

Basically, the above-mentioned three control lines are sufficient, but a signal line such as paper shortage is also defined in consideration of printer control. FIG. 20 shows signal names, inputs / outputs, and remarks. The pin numbers are 36-pin, 25-pin, and 14-pin, and there are various types of connectors, and the definition has been changed or deleted in each company, so I omitted it. FIG. 21 is a circuit block diagram showing an example of the Centronics I / F control circuit.

In the figure, 201A is Centronics I.
The / F control circuit includes a data buffer 202A and a control line buffer 203A, and data processing is performed according to the timing chart shown in FIG.

FIG. 23 is a flow chart showing an example of the signal processing procedure between the host and the printer by the Centronics I / F control circuit shown in FIG. In addition, (1) ~
(3) indicates each step, and particularly corresponds to the processing on the host side.

First, the BUSY signal is "L" and the AC
When the K signal becomes "H" (1), set the data (2),
Output DATASTROBE signal (3) and step
Return to (1).

FIG. 24 is a flow chart showing an example of the signal processing procedure between the host and the printer by the Centronics I / F control circuit shown in FIG. In addition, (1) ~
(6) shows each step, and particularly corresponds to the processing on the Centronics compatible printer side.

First, the BUSY signal becomes "L" (1),
The BUSY signal is set to "H" (2), and data is taken in from the data bus (3). Then, the data acquisition is finished (4), the ACK signal is set to "L" (5), the BUSY signal is set to "L" and the ACK signal is set to "H" (6), and the process returns to step (1). Data transfer is performed in this way.

In many cases, the Centronics printer is controlled by a method in which "ESC" (0x1B) is added to the head of a command or data under the above transfer conditions. For example, when transferring data to a printer, ESC (A
COUNT COLORDATA, (1B 28 4
1 COUNT COLOR DATA).

Here, "ESC (A)" is a control code, "COUNT" is the number of data, and "CO".
“LOR” is a color space definition such as RGB or CMY.
“DATA” is color image data. Printing is performed by continuously sending such data commands to the printer. The control code and configuration differ depending on the printer of each company. However, the control method using "ESC" is relatively similar.

This system can use various Centronics printers by connecting the Centronics printer to the Centronics port and supporting the control code with a software program.

FIG. 25 is a diagram for explaining the program configuration of the scanner / printer server (network server) SP1 and the host computer according to the present invention. Less than,
The flow of the entire system will be briefly described. The same parts as those in FIG. 2 are designated by the same reference numerals. In addition, FIG.
The host computer in is Macintosh
The station ST1 of h will be described as an example, but other stations ST2 and ST3 may be used.

Host computer (station) ST
In order to print the print data created by the operator No. 1 using the application program 56, the desired scanner printer network server, printer,
When a paper size, a data format to be sent, and the like are selected and instructed, the application program 56 communicates data (including instruction information) to the conversion program 54. The conversion program 54 converts the data sent from the application program 56 into a data structure accepted by the selected network server SP1, and the communication program 53, TCP
/ IP program 52. For example, Macint
At osh station ST1, QuickDraw
The data is converted to CaPSL data, and the station ST2 of the IBMPC converts the GDI data to CaPSL data.

The communication program 53 is the conversion program 5
4 communicates the data sent from No. 4 to the network server SP1 via the TCP / IP program, and the communication program 83 of the network server SP1 sends the TCP / IP
It is received via the program 82 and communicated with the system overall control program 93. Overall system control program 9
3 analyzes the sent data, and performs the following processing according to the state of the network server SP1 at that time and the sent data.

The overall system control program 93 sends the print data to the PDL interpreter program 84. The PDL interpreter program 84 receives the print data and converts it into data that can be accepted by the designated printer (for example, the printer of the scanner printer 95). For example, best script (product name) or CaPSL
The PDL data is converted into image data. The overall system control program 93 sends the data converted by the PDL interpreter program 84 to a device driver 86 as an image input / output device control program, and the device driver 86 sends the data to a designated printer for printing.

Next, since the operator of the host computer ST1 inputs an image using the scanner application 58, the desired scanner printer network server, scanner, image area, resolution, color or monocolor, type of compression, etc. are selected. When instructed, the scanner application 58 communicates with the communication program 53 via the scanner interface program 57. The communication program 53 communicates the data sent via the scanner interface program 57 to the designated network server SP1 via the TCP / IP program, communicates with the network server SP1, and the communication program 83 of the network server SP1 uses TCPIP.
It is received via the program 82 and communicated with the system overall control program 93. Overall system control program 9
3 sends the inputted selection instruction command (image input command) to the scanner control program 85, and the scanner control program 85 sends a command to the device driver 86 as the image input / output device control program according to the command, and the device driver specifies The selected scanner (for example, the scanner of the scanner printer 95) is activated to input the image data, and the image data is sent to the scanner control program 85. The scanner control program 85 sends the image data to the system overall control program 93 for system overall control. Program 9
3 is sent to the communication program 83, and the communication program 83 of the network server SP1 sends the image data to the communication program (for example, the communication program 53) of the designated host computer via the TCP / IP program 82. The image data received by the communication program 53 via the TCP / IP program 52 is further sent to the scanner application program 58.

Next, when a command for inquiring the status of the scanner / printer server is sent from the workstation ST1 to the specified scanner / printer server (for example, to the scanner / printer server SP1), the entire system control program 93 is executed by the network server SP1. A state (for example, the type, resolution, paper size, color processing capability of the scanner / printer connected to the network server SP1) is acquired, and a communication program 83 is designated via the TCP / IP program 82 as a host computer (for example, Communicate to workstation ST1).

When an error occurs in the scanner printer 94, 95 as the image input / output device or in the network server SP1, the system overall control program 93 manages the error status, and the communication program 83 manages the TCP / IP program. It communicates with the designated host computer (for example, host computer SP1) via 82.

As described above, in this embodiment, with these program configurations, printing can be performed by the printer specified by the host computer from the application program (for example, DTP software) of the host computer. Also, an image can be input from the scanner specified by the host computer from the scanner application program (for example, DTP software) of the host computer,
The image input by the specified scanner can also be sent to another host computer. Further, the state of the designated network server SP1 (the state of the connected scanner printer) can be confirmed.

In FIG. 25, the number of host computers and scanner / printer servers connected to the LAN 96 is not limited to the application of the present invention. Hereinafter, the host computer and the network processing between the host computer and the network server SP1 will be described.

When the print process is performed in the host computer, it is roughly divided into first to third processing,
That is, the first is an application program (for example, D
Data creation processing by TP software), the second is the above C of data created by the application program.
The conversion process to the aPSL code, and the third process is the transfer process of the CaPSL code to the network server SP1.

The data created in the first data creation process depends on the machine model used and the application program. For example, when FrameMaker (product name), which is a DTP program manufactured by Frame Technology, is used in a SUN workstation, an MIF (product name) file or an IPL (product name) file is output. Further, when the model of the machine to be used is IBM-PC manufactured by IBM Corporation and an application program compatible with Windows (product name) is used, the GDI function is called. In addition, when Macintosh (trade name) manufactured by Apple Inc. is used, Qu
It is a call to the ickDraw function.

In the conversion process of the data created by the application program into the CaPSL code, the data created in the first process is converted into the CaPSL code, so it depends on the machine model and the created file format. To do. For example, when the Frame Maker is used in a SUN workstation, it is a program for converting an MIF file or an IPL file into a CaPSL code. Further, when the model of the machine to be used is an IBM-PC manufactured by IBM Corporation and an application program compatible with Windows is used, conversion from the GDI function to the CaPSL code is performed by the conversion program. In addition, when using Macintosh (trade name) manufactured by Apple Inc., the QuickDraw function is changed to CaP.
Conversion to SL code is performed by a conversion program.

Further, thirdly, in the transfer process of the CaPSL code to the network server SP1, the data to be sent is CaPSL, but the sending process depends on the program used at the time of sending. For example, the communication program 83 shown in FIG. 2 is used, or the host computer using UNIX as the OS uses the lpq / lpd program 90.

When the scanner process is performed in the host computer, the first and second processes are largely performed. First, it receives image data from the network server SP1. Second, the scanner application program displays and saves image data.

In the first process, the image data received is saved in an image data format that can be handled by the scanner application program used in the second process.
The communication program 83 shown in FIG. 2 is used as a program used when receiving image data from the network server SP1.

In the second processing, the image data format that can be handled is determined depending on the use of the scanner application program. Define the image data format that can be handled for each input and output. Bitmap and T
Allow IFF format as input. It also allows bitmap and TIFF formats as output. When saving as a file, the TIFF format is used. When displaying, a bitmap can be used.

When connecting the host computer and the network server SP1 via a network, a plurality of programs are used. The main program is the communication program 83 shown in FIG.

The network server SP1 includes a communication program 53 and a communication program 83 on the network server SP1 side shown in FIG. 25, for example. The communication program on the host computer side mainly performs first to third processing.

The first link is established with the network server SP1 through the lower layer. The second sends CaPSL data to the network server SP1. Thirdly, the image data is received from the network server SP1 and sent to the upper layer.

On the other hand, the network server SP1 mainly performs the first and second processes. First is TCP / IP
The CaPSL data received by the communication program 83 via the program 82 is sent to the overall system control program 93. Secondly, the image data received from the overall system control program 93 is transmitted to the communication program 83.

The print process and the scan process are started when the communication program 53 receives the print and scan requests from the host layer of the host computer. The communication program 53 uses the lower layer,
Make a link. For example, when connected via Ethernet, the TCP / IP program 52 is used as a lower layer to transmit / receive data. Communication program 53
Then, after linking, information specific to printing and scanning is passed, and the printer and scanner are set to the appropriate conditions. After setting the printer and scanner, print CaPSL from the client to the server, and after setting the scanner, print CaPSL from the client to the server.
During scanning, the image data is sent from the server to the client. As the program, the lpd program 90 shown in FIG. 2 can also be used. As a host, U
When the UNIX machine is used, printing can be performed by using the standard UNIX print command lpr. This lpd program 90 (see FIG. 2) is used only at the time of printing. Even if there is no spool disk on the server side, output with the default settings is possible.

The basic operation of the overall system control program 93 is to input an event and perform processing according to the event, to inquire the status of the I / O device in error, and to recover from the error. If there is a job that has been suspended by, restart it.

The overall control operation of the server device according to the present invention will be described below with reference to the flowchart shown in FIG.

FIG. 26 is a flow chart showing an example of the overall control procedure in the server device according to the present invention. Note that (1) to (6) indicate each step.

First, in step (1), it is determined whether or not there is an event (1). If there is an event, the process corresponding to the event is performed in step (2). If there is no event in step (1), the step is performed. In (3), check if there is an I / O device in error, if there is, inquire whether it is in error in step (4), determine in step (5) whether it is in error, and if it is recovered from error, step (6) If there is a job that was interrupted by, restart it. Overall system control program 9
3 can communicate with the TCP / IP program 82, the communication program 83, the PDL interpreter program 84, the scanner control program 85, and the device driver 86 in the network server SP1, and receives various events. Events sent from the communication program 83 include the arrival of a job and the end of data transfer, and events sent from the PDL interpreter program 84 include the end of received data processing, the end of image data drawing, the end of page drawing, and the end of a print job. ,
Events from the scanner control program 85 include events such as image data transfer request, image input processing end, page print end, error occurrence, and normal state.

Further, the operation for each event is defined in the system overall control program 93. For example, when a job arrival is sent from the communication program 83, the contents of the job are analyzed and, in the case of a print job, the PDL interpreter program. The data is transferred to 84, and in the case of an image input job, the data is transferred to the scanner control program 85.

Further, as the error sent from the device driver 86, there are no paper, running out of ink, paper jam, power OFF and the like.

In this embodiment, the network server SP1 uses CaP as the page description language of the printer.
SL is adopted. Therefore, the functional processing of CaPSL and the like will be described. The page description language of the printer is not limited to CapSL.

The function of CaPSL is a task of inputting a control code representing a figure, a character or an image and expanding the image in a drawing area called a band memory of the network server SP1.

The program having direct communication with the PDL interpreter program 84 is the system-wide control program 93. The communication is the following first and second communication.

The first communication is a communication delivered by the system overall control program 93 to CaPSL, and its contents are the file name in which the CaPSL code is stored, the start address and size of the memory in which the CaPSL code is stored, and the band. For example, memory drawing possibility.

The second communication is a communication delivered by the PDL interpreter program 84 to the system overall control program 93, and its contents are band memory drawing end, page drawing end, document drawing end, band memory drawing area, empty band. Memory information.

At this time, the following processing is performed inside the PDL interpreter program 84.

Since the network server SP1 has a memory having a certain width called a band memory, the PDL interpreter program 84 must partially expand the image by the bandwidth. PD
The L interpreter program 84 inputs a printer control command as shown in FIG. The CaPSL code is replaced with the intermediate code shown in FIG. 28 in the PDL interpreter program 84 based on a program (not shown) called a layouter. In the present embodiment, the intermediate code is a representation of a so-called abstract figure into a concrete representation of a device. Then, when the intermediate code for one page is completed, the raster image is developed in the band memory while referring to the intermediate code based on a program (not shown) called a painter.

For example, when the layouter receives a CaPSL code for drawing a graphic as shown in FIG. 29, it replaces it with a device-dependent intermediate code shown in FIG. Here, the layouter calculates from which band to which band the graphic is drawn based on the size of the graphic, and registers it in the intermediate code. In FIG. 29, a circle (cir
cle) has 1 to 2 bands, rectangle (Rectangle)
Shows the case where is drawn in 2 to 4 bands. The numbers written after that are the position and radius of the figure in the device coordinate system.

Next, the painter (a program for actually drawing in the memory) develops the drawing as shown in FIG. 29 and draws it in the band memory while referring to the intermediate code. In reality, the memory has only the size corresponding to the band width, so when the band is drawn, the data is sent to the printer, the memory is cleared, and the data of the next band is started to be drawn. When the intermediate code is referred to in order to draw the 0th band, it is found that there is no data to be drawn in the 0th band, and the process moves to the next band. Then, the painter is the first
The data to be drawn in the band is searched, a circle is detected, and only one band is drawn. Next, moving to the second band, it can be seen that a circle and a rectangle are drawn, so the drawing of the portion following the circle and the rectangle are drawn for one band. In this way, the painter draws one page of data.

Note that the structure of one pixel of the data expanded by CaPSL is 32 in RGBX as shown in FIG.
It's a bit. This is the RG representing color data
It is composed of 24 bits of B and 8 bits of additional information X for additional information. Here, in the additional information X, bit 0 is an image area determination bit, and when CaPSL draws an image in the band memory, this bit is turned ON. Also, bit 2 is a black information bit, and the colors of graphics and characters developed with CaPSL are RG.
If both B are 0, this bit is turned ON. These pieces of information are analyzed when the first interface circuit 4-1 prints out with the printer 94B and serve as information for improving the image quality.

The operation of the scanners 94A and 95A will be described below with reference to the data processing route diagram shown in FIG. The same components as those in FIG. 25 are designated by the same reference numerals.

FIG. 31 shows the scanner 94A shown in FIG.
It is a data processing route diagram explaining operation | movement of 95A. The operation of tasks for a scanner that divides an image into band units and scans is slightly different from that for a case of scanning an entire image at one time.

In the case of a scanner which divides an image into band units and scans the image, first, it is sent from the host computer ST1 as a client machine.
When the communication program 83 receives the scan command C1 via the TCP / IP program 82, it notifies the entire system control program 93 of the arrival of the scan command C2.

When the apparatus has the spool I, the system-wide control program 93 creates a spool file based on the received scan command C2 and saves it, and sends the file name C3 to the scanner control program 85.
When the spool I is not provided, the scanner command C3 is sent directly to the scanner control program 85.

The scanner control program 85 interprets the scanner command C3 and gives a scanner condition setting instruction C4 such as resolution to the device driver 86 to activate the designated scanner. The device driver 86 is a function that exists corresponding to each scanner control program 85.

The device driver 86 which has set the scanner conditions sets the return value C5 to the scanner control program 85.
Return to. Upon receiving this, the scanner control program 85
Gives a scan start command C6 to the device driver 86 to activate the designated scanner. The device driver 86 operates the scanner E to read the image data and write it in the band memory F. When one band has been drawn, a scan end return value C9 is returned to the scanner control program 85. The scanner control program 85 which received this performs image processing on the image data of the band memory F, for example, compresses by using a JPEG compression board and draws it in the buffer area H.

When all the data in the band memory F have been processed, the scanner control program 85 sends a transfer request C11 to the overall system control program 93, and at the same time gives a scan start command C6 to the device driver 86 to activate it. This scan is controlled by the scanner control program 85 to read from the end point of the previous scan.

On the other hand, the overall system control program 93 which has received the transfer request C11 sends the transfer request C12 to the communication program 83. Communication program 83 that received this
Sends the processed image data in the buffer area H to the host computer as the designated client machine. At this time, the communication program 83, the entire system control program 93, the scanner control program 85,
Since the programs are different, the image data can be transferred even while the scanner is operating under the control of the device driver 86 which is a function in the scanner control program 85.

When the transfer is completed, the communication program 83 sends a transfer end signal C14 to the system overall control program 93.
Then, when the system control program 93 receives the request, the entire system control program 93 transfers to the scanner control program 85.
To send. The scanner control program 85 sends a return value C9 from the device driver 86 to notify the end of scanning,
When both the transfer end C15 are received, the image data in the band memory F is image-processed and written in the buffer area H. By repeating the above processing, the image data can be sent to the host computer ST1. The image data can be sent to another host computer by designating another host computer (for example, the host computer ST2 or the host computer ST3).

When the scanner control program 85 confirms the transfer of all the image data, it notifies the communication program 83 of the end through the entire system control program 93.

On the other hand, when scanning all images at once, when the communication program 83 receives the scan command C1 sent from the client computer, for example, the host computer ST1, the scan command is sent to the system overall control program 93. Notify the arrival of C2.

When the apparatus has the spool I, the system-wide control program 93 creates a spool file based on the received scan command C2 and saves it, and sends the file name C3 to the scanner control program 85.
When the spool I is not provided, the scanner command C3 is sent directly to the scanner control program 85.

The scanner control program 85 interprets the scanner command C3 and sets the scanner condition setting C such as resolution.
4 is given to the device driver 86 to activate the designated scanner. The device driver 86 that has set the scanner conditions sets the return value C5 to the scanner control program 85.
Return to. Upon receiving this, the scanner control program 85
Activates the scan start instruction C6 to the device driver 86. The scanner E here cannot stop the reading operation on the way.

The device driver 86 operates the scanner E in response to the instruction C10 to capture all the image data, and performs image processing on the captured image data, for example, JPEG.
It is possible to perform JPEG compression using the board G and draw it in the buffer H.

It is also possible to write the image data in the buffer H as it is. When the buffer H becomes full, the scanner control program 85 sends a transfer request C11 to the system overall control program 93. The overall system control program 93 which received this is the communication program 8
3, the transfer command C12 is issued, and the communication program 83 transfers the data drawn in the buffer H to the designated host computer ST1. By specifying another host computer (for example, the host computer ST2 or the host computer ST3), the image data can be sent to the other host computer.

When the transfer is completed, the communication program 83 sends a transfer end signal C14 to the system overall control program 93.
Then, when the system control program 93 receives the request, the entire system control program 93 transfers to the scanner control program 85.
To send. The scanner control program 85 sends a transfer end C1.
When 5 is sent, the image data in the band memory is processed and written in the buffer H. By repeating the above processing, the image data can be sent to the designated host computer as the client machine.

When the scanner control program 85 confirms the transfer of all the image data, it notifies the communication program 83 of the end via the system overall control program 93.

The flow of data from the host computer to the S / P server device in the server device according to the present invention will be described below with reference to FIGS. 32 and 33.

S / P designated by the host computer
In the data flow to the server device (network server) SP1, first, for example, the host computer S
At T1, the DTP application program 56 is executed to create a document. The data format of this document depends on the host computer model and application program. Therefore, it is necessary to convert the data into a format that can be interpreted by the designated S / P server device SP1. The conversion program is the conversion program 54. Data depending on the system of the host computer is sent to the conversion program 54 from the DTP application program (DTP application) 56. The conversion program 54 converts the received file into, for example, a CaPSL code. Furthermore, Ca
The file converted into the PSL code is sent to the communication program lpd 505 or the communication program 53.

The communication program consists of the host computer and S
/ P server apparatus SP1 for connecting and communicating via a network, and here, either one of the two programs is prepared.

First, the case where the communication program 53 is used will be described.

As a program corresponding to the communication program 53, a program that controls communication on the S / P server device SP1 side is a communication program 83, and a TCP / IP program is used between these programs. The communication program 53 has two main roles during printing, and one is to establish a link with the communication program 83 via the lower layer (TCP / IP) so that communication can be performed. The other is to send the CaPSL data file generated by the conversion program 54 to the S / P server device SP1.

The role of the communication program 83 is to establish a link so that information necessary for print processing can be exchanged so that optimum printing can be performed. It receives the data sent from the communication program 53 and notifies the system overall control program 93 of the arrival of the data. At this time, the sent CaPSL data and the information accompanying it are temporarily stored in the reception buffer. Also, when some error occurs on the S / P server device SP1 side,
It also has a role of transmitting the information to the communication program 53.

The processing from the communication program 83 to printout will be described below.

Up to this point, the document data created by the DTP application program 56 has been sent to the S / P server device SP1. Next, the communication program 83 sends an event of arrival of a job (for example, printout from a color laser copying machine (CLC)) to the system overall control program 93. The overall system control program 93 is an event-driven program, and is always waiting for an event sent from the communication program 83, device driver 86, and PDL interpreter program 84. When an event comes in, the sender and the content of the event are checked and the corresponding processing is performed. Now, the communication program 83 is included in the overall system control program 93.
The event "Job has arrived" has been entered. At this time, the system overall control program 93 analyzes the event and temporarily spools the document data in the reception buffer when the hard disk 519 is held. When some jobs are accumulated, the job is optimally started in consideration of the contents of the job, the status of the printer and the scanner, the priority order of the job, and the like.

If the hard disk 519 does not exist, data cannot be stored. Therefore, the PDL interpreter program 84 is informed of the address and size of the data and a request is made to immediately execute printout processing. put out. Here, the description will be continued assuming that there is a hard disk. The overall system control program 93 judges the contents of the job, passes the spool file name to the PDL interpreter program 84, and requests activation.

Further details will be described below with reference to the block diagram shown in FIG.

FIG. 33 is a block diagram for explaining a data processing state of the S / P server device SP1 according to the present invention and, for example, a color laser copying device (CLC).

The PDL interpreter program 84 shown in FIG. 32 reads the CaPSL data from the spool file, interprets it, and draws figures, characters, and images in the band memory 518. If the CaPSL data includes image data that is compressed and encoded, the PDL interpreter program 84 uses the standard compression / decompression unit 60.
At 6, the image data is expanded and drawn in the band memory. When the drawing for one band is completed, the PDL interpreter program 84 is the entire system control program 9
An event of "end 1 band drawing" is issued to 3. The overall system control program 93 that has received the event issues a request event of "one-band paper ejection" to the device driver 86.

The data flow from the band memory 605 to the compression memory 615 will be described below. The operation of the device driver 86 will be described here.

The device driver 86, which has received the event of "1 band paper discharge", transfers the expansion data stored in the band memory 605 to the line buffer 617 of the sub board 610A. The expanded data stored in the line buffer 617 is transferred to the real-time compression / expansion unit 616 in block order. Real-time compression / expansion unit 61
In 6, the image data obtained in block sequence is compressed and stored in the compression memory 615 sequentially. Compression memory 6
The DMA controller 621 performs the address generation of 15 and the generation of the write signal.

When the compression for one band is completed, the device driver 86 sends an event of "end of one band paper discharge" to the system overall control program 93. The whole system control program 93 which received the event is PD
The “one-band drawing request” event is output to the L interpreter program 84. In this way, the process of drawing and compressing for each band is repeated, and the compressed and expanded image for one page is stored in the compression memory 615. When the storage of the last band is completed, the PDL interpreter program 84 issues an event of “end one page drawing” to the system overall control program 93. System-wide control program 93 that received the event
Issues a “one-page discharge command” to the device driver 86.

The device driver which has received the "one-page discharge command" performs the following processing in order to print out the expanded image for one page stored in the compression memory 615.

The CPU 611 turns on the DPRAM 622 and then initializes the real-time compression / expansion unit 616 and the DMA controller 621 and designates the designated printer 620.
To communicate commands with the real-time compression / decompression unit 6
A command to start decompression is issued to 16. The real-time compression / expansion unit 616 accesses the DMA controller 621 to perform DM
The A controller 621 generates an address and a read signal, the compressed data is input from the compression memory 615 to the real-time compression / decompression unit 616, and after decompression, it is output to the line buffer 617 in block sequence. Then, the line buffer 617 performs block-sequential to raster-sequential conversion and transfers the data through the SPI / F 618 to the printer 6.
It is output to 20. When the printing of one page is completed, the device driver 86 sends an event of "end of one page discharge" to the system overall control program 93.
Sent to. Then, the entire system control program 93 issues a "drawing command for the second page" to the PDL interpreter program 84. In this way, the output of a multi-page document is processed.

When the drawing of the final band of the final page is completed, the PDL interpreter program 84 sends a "document end" event to the system-wide control program 9
Issue to 3. Overall system control program 93
Is a "one-page discharge command" to the device driver 86.
Then, the device driver 86 performs a print process and issues a “one page discharge completion” event to the system overall control program 93. For the end of printing, the system-wide control program 93 issues a "print end" event to the communication program 83 if necessary. The communication program 83 notifies the communication program 53 on the host computer side of the end of printing.

When an error occurs, for example, when the printer 620 has a paper jam or is out of paper, the device driver 86 sends an "error occurrence" event to the overall system control program 93. The whole system control program 93 uses the PD
L interpreter program 84 and communication program 8
Tell 3. The PDL interpreter program 84 performs processing at the time of error such as saving the state of the program, and the communication program 83 informs the communication program 83 on the host computer side of the occurrence of the error and its contents.
There are two possible methods for checking whether the error has been recovered. One is a method in which the system-wide control program 93 makes an inquiry to the device driver 86 at regular intervals and the device driver 86 responds.

The other is that the overall system control program 93 monitors the error recovery and issues an "error recovery" event to the overall system control program 93 at the time of recovery.

The print data output processing from the host computer to, for example, the bubble jet color copying apparatus will be described in detail below with reference to FIGS. 32 and 34.

FIG. 34 shows an S / P server apparatus SP1 according to the present invention and, for example, a bubble jet color copying apparatus (BJ
It is a block diagram explaining the data processing state with C).

The data flow from the host computer to the S / P server device SP1 is as shown in FIG. 32. First, the DTP application program 56 is executed in the host computer to create a document. The data format of this document depends on the host computer model and application program. Therefore, it is necessary to convert the data into a format that can be interpreted by the S / P server device SP1. The conversion program is the conversion program 54. Data depending on the DTP application is sent from the DTP application program 56 to the conversion program 54. The conversion program 54 converts the received file into a CaPSL code. Further, the file converted into the CaPSL code is sent to the communication program lpd 505 or the communication program 53.

The communication program consists of the host computer and S
/ P server device SP1 for connecting and communicating via a network, and two programs are prepared here.

First, the case where the communication program 53 is used will be described.

As the program corresponding to the communication program 53, the program that controls communication on the S / P server device SP1 side is the communication program 83, and the TCP / IP program is used between these programs.

The communication program 53 has two main roles at the time of printing. One is to establish a link with the S / P server device SP1 designated through the lower layer (TCP / IP) so that communication is possible. Is. The other is to send the CaPSL data file generated by the conversion program 54 to the communication program 83.

The role of the communication program 83 is to establish a link so that information necessary for print processing can be exchanged so that optimum printing can be performed. The data sent from the communication program 53 is received, and the system overall control program is notified of the arrival of the data. At this time, the sent CaPSL data and the information accompanying it are temporarily stored in the reception buffer.

Further, it also has a role of transmitting the information to the communication program 53 on the host computer side when an error occurs on the S / P server device SP1 side. Communication program 53 on the host computer side
When it is printed out from, the document data created by the DTP application program 56 has been sent to the designated S / P server device SP1. Next, the communication program 83 sends an event of arrival of a job (for example, printout from the BJ color copying machine) to the system overall control program 93. The overall system control program 93 is an event-driven program, and is always waiting for an event sent from the communication program 83, device driver 86, and PDL interpreter program 84. When an event comes in, the sender and the content of the event are checked and the corresponding processing is performed.

Now, the event "job has arrived" is input from the communication program 83 to the overall system control program 93. At this time, the system overall control program 93 analyzes the event and analyzes the hard disk 519.
When it has, the document data in the receive buffer is spooled once. When some jobs are accumulated, the job is optimally started in consideration of the contents of the job, the status of the printer and the scanner, the priority order of the job, and the like.

If the hard disk 519 does not exist, data cannot be stored. Therefore, the PDL interpreter program 84 is informed of the address and size of the data and a request is made to immediately execute the printout process. put out. Here, the description will be continued assuming that there is a hard disk. The overall system control program 93 judges the contents of the job, passes the spool file name to the PDL interpreter program 84, and requests activation. The PDL interpreter program 84 reads the CaPSL data from the spool file, interprets it, and draws figures, characters, and images in the band memory 518. If the CaPSL data contains image data that has been compressed and encoded, the PDL interpreter program 84 decompresses the image data in the standard compression / decompression unit 606 and draws it in the band memory. When drawing for one band is completed, PDL interpreter program 8
Reference numeral 4 issues an event of “1 band drawing end” to the system overall control program 93. The overall system control program 93 that has received the event issues a request event of "one-band paper ejection" to the device driver 86.

On the other hand, in the case of printing out from the band memory 518, the device driver 86 which has received the request event of "1 band discharge" is the interface board 6
10B is controlled to print by the designated bubble jet color printer (BJ printer) 656. The image data of one band developed in the band memory 605 of the main CPU board 610 is transferred to the band memory 653. The data in the band memory 653 is read out in a scanning format suitable for the BJ head, and enters the image processing unit 652 through the buffer 651. Here, processing is performed according to preset parameters. N in the band memory
Processing for converting TSC-RGB to RGB inside the BJ printer 656 is performed. Then, it is sent to the printer engine section of the BJ printer 656 through the interface 618. The control of the BJ printer 656 is performed by the CPU 611 by interpreting a command from the CPU 601. 65
0 is a dual port RAM.

When these processes are repeated until the final band, the PDL interpreter program 84 sends a "document end" event to the system overall control program 9
Issue on 3 and finish printing. At the end of printing, the system-wide control program 93 issues a "print end" event to the communication program 83 if necessary. The communication program 83 notifies the communication program 53 on the host computer side of the end of printing.

When an error occurs, for example, when the printer 656 has a paper jam or is out of paper, the device driver 86 sends an "error occurrence" event to the overall system control program 93. . The overall system control program 93 indicates to that effect
Notify the DL interpreter program 84 and the communication program 83. PDL interpreter program 84
Performs processing at the time of error such as saving the state of the program, and the communication printer 83 notifies the communication program 53 on the host computer side of the occurrence of the error and its content. There are two possible methods for checking whether the error has been recovered. One is a method in which the system-wide control program 93 makes an inquiry to the device driver 86 at regular intervals and the device driver 86 responds.

The other is that the overall system control program 93 monitors the error recovery and issues an "error recovery" event to the overall system control program 93 at the time of recovery.

In the following, when color images are communicated between different models, if these input / output devices are simply connected, the characteristics will be different and optimum color reproduction will be difficult. For this reason, at present, studies are being conducted in the direction of mutual communication in each device in a unique color space and in a standard color space on a communication path. Therefore, a color space conversion processing method under such a request will be described below.

For the sake of explanation, it is assumed that the color space of the input device on the transmission side is A, the color space on the communication path is B, and the color space of the receiving printer is C.

The color space on the communication path will now be described in the case of a relatively well-known color space, for example, the YCrCb color space often used in color image coding.

On the other hand, the color space A on the transmitting side is generally different from the YCrCb color space and has a different color gamut, and normally, the two color spaces are connected in the form of the expression (1).

[Ra] [a11 a12 a13] [y] [Ga] = [a21 a22 a23] [cr] [Ba] [a31 a32 a33] [cb] (1) Here, Ra, Ga, Ba Is the coordinates (Ra, Ga, Ba) of any one point in the color space A, and the corresponding one point in the YCrCb color space is (y, cr, cb). The coefficients a11 to a33 are obtained and used by, for example, the least squares method so that they can be approximated in all of these color spaces.
Therefore, the color space conversion for communication with the input color space of the device is performed by the above (1).

On the other hand, when converting from the standard color space on the communication path to the color space on the recording side, there are several methods, but in this embodiment, the processing is performed as follows.

First, the standard color space on the communication path is set to YCrC.
When it is set to b, YCrCb is converted into RGB. Y
Since the CrCb space can be linearly converted into the NTSC, it will be described below as the NTSC color space.

Although the NTSC standard color space is based on additive color mixture, a subtractive color mixture system is used for printing. Therefore, it is necessary to convert additive color mixture and subtractive color mixture. This transformation is complex to construct and very difficult to solve purely logically. Therefore, in this embodiment, an additive color mixture type color space close to the color space on the recording side is used as the internal standard color space on the recording side. Here, the HDTV (HighD) is narrower than the NTSC color space.
definitionTV) standard color space D on the recording side
And

Furthermore, the relationship between the recording side internal standard color space D and the device color space C is determined by the following (2).

[Y] [A11 A12 A13] [Rh] [M] = [A21 A22 A23] [Gh] [C] [A31 A32 A33] [Bh] [K] [A41 A42 A43] (2) Here, Y, M, C, and K are primary colors for printing, and are yellow, magenta, cyan, and black components. R
h, Gh, and Bh are recording side standard color space components. Also,
A11 to A43 are coefficients calculated by the least-squares method by relating the printing and the recording internal standard color space at a plurality of points.

The standard color space on the communication path and the standard color space inside the recording are converted as follows.

The NTSC standard color space on the communication line seeks three-dimensional outermost surface representative information between colors that can be expressed by NTSC from basic stimuli. Similarly, the recording side internal standard color space H
Representative position information of the outermost surface of the DTV can also be obtained.

Now, one point (Rn, G
n, Bn) to corresponding points (Rh, Gh,
Bh) is calculated from Rn, Gn, Bn to CIEL
^* a ^* b ^* conversion to Ln, an, bn. Similarly, Rh, Gh, Bh are converted into CIE L ^* a ^* b ^* ,
Lh, ah, bh. Θ = atan (a with Ln constant
The outermost approximate position on the HDTV and NTSC color spaces close to (n / bn) is obtained from the above table. If the NTSC outermost contour surface position is (Lon, aon, bon) and the HDTV outermost contour surface position is (Lon, aoh, boh), then a
h and bh are determined by the following equation (3).

Ah = (aoh / aon) ^* an bh = (boh / bon) ^* bn (3) These ah and bh are corresponding positions in the HDTV color space after color space compression. Therefore, an arbitrary point (Rn, Gn, Bn) on the NTSC color space is converted to (Rh, Gh, Bn) on the recording side standard color space. Therefore, the amount of each component of Y, M, C, and K to be printed is determined by the equation (2), and printing becomes possible.

In the present embodiment, the standard color space is provided inside the recording side, but this is because the standard color space on the communication line is not limited to one. Therefore, multiple standard color spaces may be used. Even in that case, if the present method is used and the color space on communication is not the NTSC color space and the color space of itself can be defined, the standard color space conversion can be performed by the above method.

The abnormality processing of the peripheral equipment will be described below with reference to FIG.

FIG. 35 is a block diagram for explaining the structure of the network system with the server device according to the present invention.

When an abnormality occurs in a peripheral device during job execution, the S / P server device SP1664 does not wait until the abnormal peripheral device recovers from the abnormality, but gives priority to a job that can be executed in that state. (The jobs that can be executed will be described later). In addition, an error occurred at the time of execution of a job (hereinafter also referred to as an error job) that was being executed for the peripheral device in which the error occurred when the error occurred, after saving the information required to restart the job. By registering in the S / P server device SP1664 as a job waiting for processing, it is possible to restart the job after the peripheral device in which the abnormality has occurred recovers from the abnormality. Whether or not to register the error job so that it can be restarted depends on the degree of the abnormality that has occurred and the setting of the SP server.

As an example, a case where three computers 661 to 663, two color scanner printers 665 and 666, and one scanner 667 are connected to the server device will be described.

Color scanner printers 665 and 666
Can process print and scan jobs respectively. The abnormality job processing operation will be described below with reference to the flowchart shown in FIG. S / P
Server Device 664 FIG. 36 is a flow chart showing an example of an abnormality occurrence job processing procedure in the server device according to the present invention. In addition, (1) to (10) indicate each step.

For example, the host computer 661 sends a print job for the color scanner printer 665 to S / S.
It is requested to the P server apparatus 664 and executed, and the host computer 662 executes the system overall control program 93.
It is assumed that the print job is requested and is waiting for processing, and the host computer 663 is requesting the scan job to the entire system control program 93 and waiting for processing. If an error occurs in the printer portion of the color scanner printer 665 during execution of this print job.
(1) At this time, first, the S / P server device 664 checks whether or not the abnormality that has occurred in the color scanner printer 665 is an abnormality that is difficult to recover (2). Color scanner printer 66
If the S / P server apparatus SP1 determines that the abnormality that occurred in 5 is an abnormality that is difficult to recover, the S / P server apparatus S
P1 immediately discards the error job (10), selects the next processable job and executes it (9).

In the present embodiment, the jobs that can be processed are jobs other than the print job for the color scanner printer 665 in which an abnormality is currently occurring, namely, a scan job for the color scanner printer 665, and a color scanner printer 666. Print job for color scanner printer 666. Scan job for color scanner printer 667.

When there are a plurality of jobs that can be processed, the jobs are executed according to the method described later.

If the abnormality occurred in the color scanner printer 665 is an abnormality that is difficult to recover, the S / P server device 66
4 does not determine, the S / P server device 664 performs a retry process (see FIG. 37) for the color scanner printer 665.

Retries are repeated up to N times (for example, 5 times), which is set in advance (3). If the color scanner printer 665 recovers from the abnormal state (successful retries) before retrying N times, the job is restarted (6). The color scanner printer 665 did not recover from the abnormal state even after retrying N times (
If the retry fails), S / P server device 664
Checks to see if there are other jobs available (4).
If there is no job that can be processed, the S / P server device 664 retries M times (for example, once) that is defined separately from the number of retries (5), and if the retries succeed, an error job is issued. Resume. If the retry fails, check if there are jobs that can be processed again.
(Four) . When there is a processable job, the S / P server device 664 saves the error job (7),
Register the error job as a job in which an error occurred during execution (8), and execute the next processable job (9).

In the present embodiment, the job saving means information necessary for restarting the job such as status information of the S / P server device 664 at the time of executing an error job, for example, storage means (eg hard disk) or S. This is a process of storing in a memory in the / P server device or a program in the S / P server device.

FIG. 37 is a flow chart showing an example of a retry processing procedure in the server device according to the present invention. It should be noted that (1) to (5) indicate each step.

The retry process is to wait for a predetermined time (for example, 30 seconds) (1), and then check whether the peripheral device in which the abnormality has occurred has recovered from the abnormal state (2).
Repeat a certain number of times X (for example, 5 times) (3). The retry is successful if the peripheral device in which the abnormality has occurred is recovered from the abnormal state by repeating a certain number of times (5), and if it is not recovered, the retry fails (4).

The multi-print control operation by the server device according to the present invention will be described in detail below.

The scanner / printer network server (SP network server) includes a color laser beam copying machine (CL) including a scanner and a printer.
C), bubble jet color copying machine (BJC) consisting of scanner and printer, bitmap printer connected with standard interface, PDL printer (CaPSL, PS), commercially available scanner and many other devices can be connected It has become. Also, in order to allow these devices to be used freely from the host machine on the network, each job is controlled as follows.

For example, a request to output a 10-page document is sent from the host computer A to the color laser beam copying apparatus to the SP network server, and a color original is input from the host computer B from the scanner of the bubble jet color copying apparatus (BJC). It is assumed that the host computer C further requests to output to the PDL printer. As described above, various requests are sent from the host computer on the network to the SP network server, and the SP network server executes the following job control in order to handle those requests (jobs). In this embodiment, a print request and a scan request are called a job. For example, consider a request to output a 3-page document described in CaPSL code to a printer of a color laser beam copying machine (CLC) as one job. In the job control of the SP network server, only two jobs are allowed to run at the same time. However, when three or more jobs are run, the control can be extended to achieve almost the same control.

The job control operation in the server device according to the present invention will be described below with reference to FIG.

FIG. 38 is a timing chart for explaining the job control state in the server device according to the present invention. Note that the job processing depends on whether the SP network server has a hard disk for spooling, and the job control 1 according to any one of (a) to (e) in FIG.
Broadly divided into ~ 5. For the sake of explanation, jobs 1 and 2 are requested to print three pages or to scan three pages. [Job Control 1] As shown in FIG. 4A, the job control 1 executes the job requested first, and the next job 2 spools on the hard disk, and when the job is finished, Start job 2. [Job Control 2] Job control 2 is a special case, as shown in FIG. 2B, but corresponds to control when two or more devices are moved by one job. For example, a color laser beam copying machine (CL
C), the case of outputting to the bubble jet color copying machine (BJC). [Job Control 3] The job control 3 includes the concept of page in the job as shown in FIG. In this case, in the case of printing, the page unit of a document is used, and in the case of a scanner, the unit of scanning one page of a document is used. For example, when a request for job 2 is received while executing job 1, job 2 is interrupted at a page break and job 2 is executed. In this case, job 1 and job 2 do not move at the same time. [Job Control 4] As shown in FIG. 4D, the job control 4 immediately executes the job 2 while the job 1 is being executed when a request for the job 2 is received while the job 1 is being executed. [Job Control 5] As shown in FIG. 7E, the job control 5 rejects the job 2 when a request for the job 2 is received while the job 1 is being executed.

In the case of the configuration of the server device shown in FIG. 1, the types of jobs are classified into the following (1) to (7).

(1) Color laser beam copying machine (CL
The document is output to the printer of C).

(2) Color laser beam copying machine (CL
The original is read by the scanner of C).

(3) Bubble jet color copying machine (B
JC) output the document to the printer.

(4) Bubble jet color copying machine (B
Read the document from the JC) scanner.

(5) Output to a printer that has a commercially available page description language interpreter. (6) Output the document to a commercially available bitmap printer.

(7) The original is read by a commercially available scanner.

The priority processing of each job will be described below.

For example, when a scan job is to be performed immediately and a print job is being executed, the print job can be interrupted and the scanner job can be performed.
In this embodiment, three levels of priority 0 to 2 can be specified. If priority 0 is not specified (first in first out), priority 1 is per job and priority interrupt is specified. Is a case where priority interrupt is designated in page units. The SP manager control operation in the server device according to the present invention will be described below with reference to FIG.

FIG. 39 is a diagram showing a control processing state of the system overall control program 93 in the server device according to the present invention. In the present embodiment, the overall system control program 93 optimally controls the job of the printer by referring to the priority of the job and the type of the job sent from the host computer. Job management in the case where various requests are sent from the host computer on the network to the SP network server will be described below with reference to the drawings.

First, the conceptual structure of each program will be described. As shown in FIG. 39, a communication program 83 for communication, an overall system control program 93 for controlling the entire SP network server, and a scanner control program for a scanner program. 85, P of the program related to print processing (CaPSL interpreter)
The program is roughly divided into five programs: a DL interpreter program 84 and a device driver 86 that actually controls the input / output devices. Further, as an interface through which data actually flows, a band memory (BMEM) 70-
1, Centronics Interface (CENTR) 70
-2, RS232C interface (RS232) 70
-3, and these are the whole system control program 93
Is managed by.

The system-wide control program 93 basically executes an event-driven process which is driven by events from the other four programs, according to the flow chart shown in FIG.

FIG. 40 is a flow chart showing an example of an event processing procedure of the system overall control program 93 shown in FIG. Note that (1) to (9) indicate each step.

First, the system overall control program 93 is activated when the power of the SP network server is turned on, and immediately enters an infinite loop waiting for an event. When the program starts running, it waits for an event (1). When an event is input, it exits the loop and determines if the event is from the communication program 83 (2),
If YES, the process according to the event is performed (3). Then, the process returns to step (1) and the loop waits for an event.

On the other hand, if the determination in step (2) is NO, then it is determined whether the event is issued to a print job of the PDL interpreter program 84 (4),
If YES, the process according to the event is performed (5).

On the other hand, if the determination in step (4) is NO, the event issuance destination is the scanner control program 8
It is determined whether the job is a scanner job of No. 5 (6), and if YES, processing according to the event is performed (7).

On the other hand, if the decision in step (6) is NO, it is decided whether the event is issued from the device driver 86 (8). If NO, the process returns to step (1), and if YES, the event (9) and returns to step (1).

On the other hand, from the communication program 83, various system requests such as a job related to printing of a color laser copying machine (CLC) and a job related to a scanner of a bubble jet color copying apparatus are irregularly requested, and the entire system control program 93 is sent. Sent to. These multiple jobs must be optimally distributed as resources permit. The algorithm will be described below with reference to FIG.

FIG. 41 is a diagram showing a job management state in the server device according to the present invention.

As shown in this figure, a job table is used to manage jobs. The job table has an ID for identifying a job, a status indicating a job state, a job execution priority, a job type, an end page, and an interrupt job ID.

The ID is a serial number and can be considered as the order of accepting job requests. The status includes RUN indicating execution, WAIT waiting for processing, STOP indicating interruption due to interruption, and ESTOP indicating wait for recovery when an error occurs. Priority is LEVE
There are L0 to 2, and 0 is "not specified", and this level is usually specified. 1 is a "priority interrupt for each job", and when some jobs are in a waiting state, they are processed with priority over those jobs. Further, 2 represents “interrupt in page units”, and even if a job is currently being processed, if the page breaks, the job is interrupted and the LEVEL2 job is processed.

The interface refers to the hardware used by the jobs as shown in FIG. 39, and is provided so that the jobs can exclusively use the hardware. Also, the job is a color laser copying machine (CL
CLCP to output the document from the printer of C),
CLCS that reads a document from a scanner of a color laser copying device (CLC), BJP that outputs a document to a printer of a bubble jet color copying device, and BJ that reads a document from a scanner of a bubble jet color copying device
S, PDLP that outputs to a printer that has a commercially available page description language interpreter, BITP that outputs a document to a commercially available bitmap printer, and a job that reads an original from a commercially available scanner. The number of pages processed by the job is recorded in the end page.
This is used to judge which page should be restarted when an error occurs after error recovery.
The last interrupt job ID is used to judge whether the interrupted job is completed. If it is completed, ST
Resume the job in OP.

The overall system control program 93 optimally determines which job is to be started next with reference to the job table in which the above information is stored.

The job execution processing operation in the server device according to the present invention will be described below with reference to the flowchart shown in FIG.

FIG. 42 is a flow chart showing an example of the job execution processing procedure in the server device according to the present invention. Note that (1) to (6) indicate each step.

The timing at which control moves to this flow is as follows. Overall system control program 9
When there is no event in 3 and it is in the idle state, the flow moves to this flow after a certain interval. Then, if there is no job in the job table, it becomes idle again. When there is an event from the communication program 83. When a page end event or a document end event is received from the PDL interpreter program 84 or scanner control program 85. When there is an event such as an error from the device driver 86.

First, in step (1), the job table shown in FIG. 41 is referred to. Then, in step (2), it is determined whether there is a job. When there is no job to be executed, the process proceeds to step (7) and the system overall control program 93 becomes idle. If there are jobs to be executed, select some of the jobs that can be executed in step (3) and narrow down to one job by checking the priority of the jobs that have been selected as candidates in step (4). Further, in step (5), it is determined whether the interface used by the narrowed-down job is free. In step (6), the job is actually executed and the processing ends.

The status check processing operation in the server device according to the present invention will be described below with reference to the flowchart shown in FIG.

FIG. 43 is a flow chart showing an example of the status check processing procedure in the server device according to the present invention. In addition, (1) to (14) indicate each step.

First, in step (1), the status of one job is read from the job table. In step (2), determine whether the job status is RUN and
If so, it moves to step (14) to judge whether all the jobs in the job table have been read. If there are more jobs left, go to step (1) to read the status of the next job. If it is not RUN, go to step (3). In step (3), it is judged whether the job status is WAIT. If it is WAIT, it is picked up as a candidate for the executable job in step (4). And step (1
Go to 4). If it is not WAIT, the process moves to step (5), and this time it is judged whether the status is ESTOP. If the status of this job is ESOP,
Since it caused an error and was interrupted, in step (6) it is checked whether the error that caused this job to be interrupted has been recovered. Step (7) is a branch for determining whether an error is occurring or not. If there is still an error, the process proceeds to step (14) without picking up a job candidate that can be executed. When the error is recovered, the status of the job is rewritten from ESTOP to WAIT in the job table. Then, it is picked up as a job candidate that can be executed in step (9). Again step
If it is determined in (5) that the status is not ESTOP, the STO is interrupted by another job and suspended.
Since the status is P, the status of the job interrupted in step (10) is checked. In step (11), it is judged whether the interrupted job is being executed. If it is running, step without picking up as a candidate for a job that can be executed
Move on to (14). If it is not being executed, the process moves to step (12), and the job table is rewritten from STOP to WAIT. Then, the job is picked up as an executable job in step (13). Finally, after reading all jobs from the job table (14),
The status check ends. In this way, a plurality of executable job candidates are selected.

The priority check processing operation in the server device according to the present invention will be described below with reference to the flowchart shown in FIG.

FIG. 44 is a flow chart showing an example of the priority order check processing procedure in the server device according to the present invention. It should be noted that (1) to (11) indicate each step. Further, in the present embodiment, the jobs to be executed are narrowed down to one by looking at the priority order of the jobs selected as candidates.

The priority is read for one of the plurality of jobs listed as candidates of executable jobs in step (1). In step (2), it is judged whether LEVEL2. If it is LEVEL2, the process moves to step (3) and a flag FLG2 indicating whether or not a job of LEVEL2 exists is set. If it is not LEVEL2, step
Go to (4) and judge whether LEVEL1 is set this time.
If it is LEVEL1, the process moves to step (5) and a flag FLG1 indicating whether or not a job of LEVEL1 exists is set. If it is determined that it is not LEVEL1,
It becomes LEVEL0. That is, when neither FLG2 nor FLG1 is standing, it becomes LEVEL0.

When the priority of one job is determined, the process proceeds to step (6), and it is determined whether all the jobs selected as candidates have been examined. If all the checks have not been completed yet, the process returns to step (1) to move to the determination of the next job, and if all the checks have been completed, the process proceeds to step (7). When the flag FLG2 is set, the process proceeds to step (8) and the priority is LEV.
In EL2, a job with a small job ID (that has received a job request earlier) is selected.

Similarly, in steps (9) and (10), a job having a priority LEVEL1 and a small job ID is selected. In step (11), a job with a priority level LEVEL0 and a small ID is selected, and the priority level check is completed.

In this way, the jobs that can be started next are narrowed down to one. Even if a job that can be started is determined, it is necessary to check the relationship between the job and the interface because the state of the interface determines whether the job can be actually started.

The interface check processing operation in the server device according to the present invention will be described below with reference to the flowchart shown in FIG.

FIG. 45 is a flow chart showing an example of the interface check processing procedure in the server device according to the present invention. Note that (1) to (9) indicate each step.

First, in step (1), the interfaces of the jobs narrowed down to one are read from the job table. Check the status of the interface in step (2). If not in use, move to step (5) and register the job in the execution job table. The execution job table is a table representing jobs to be actually started, and multiple jobs can be run, so that a plurality of jobs can be registered.

In the job processing of step (6), the job is started by referring to this execution job table.

If the interface is in use, the process proceeds to step (3) to check the job priority. LEV
If it is not EL2, the current job cannot be interrupted, so the process is terminated without registering it in the execution job table. Also, in step (3), LEVE
When L2, the current status is RUN in step (4).
Of the job is LEVEL2. If R
If the UN job is LEVEL2, it cannot be interrupted, so the selected job is terminated without being registered in the execution job table.

On the other hand, the priority of the job currently being executed (status is RUN) is LEVEL1 or LEVEL0.
In the case of, the job currently being executed is suspended and the newly selected job is started. In that case, the process proceeds to step (6), and the job selected in step (4) is registered in the execution job table. In step (7), the status of the job currently being executed is set to STOP and the priority is set to LE.
Set to VEL2. This is to give priority to the job when the job returns.

In step (8), the number of finished pages is written in the job table in order to record how many pages the currently executing job has processed. Further, in step (9), the job currently being executed is deleted from the execution job table.
This will not launch the currently running job,
The status also becomes STOP, and it waits for the job to be started again. In this way, the interface check process ends.

The job activation processing operation in the server device according to the present invention will be described below with reference to the flowchart shown in FIG.

FIG. 46 is a flow chart showing an example of a job activation processing procedure in the server device according to the present invention. Note that (1) to (4) indicate each step.

First, in step (1), the job to be started is read by referring to the execution job table. The job to be started in step (2) is status ES.
Check if it is the same as the type of the job that is error-stopped with TOP. If they are the same, go to step (4) because it cannot be started. Judge whether all execution job tables have been read. If it still remains, move to step (1) and start the next job. If it is different from the type of job that is in error stop, it can be executed, so move to step (3) and start the job. When starting the actual job, set the status to WAI
The interface is secured by changing from T to RUN. On the contrary, when interrupted by error stop or interrupt, the interface is released.

At step (4), it is judged whether there are any jobs remaining in the execution job table, and if there are no more jobs to be started, the job starting process is terminated.

Specific job processing operations in the server device according to the present invention will be described below with reference to FIGS. 47 to 57.

FIG. 47 is a timing chart showing a job processing state transition in the server device according to the present invention. It is assumed that time flows in the right direction of the horizontal axis in the figure. In the figure, reference numerals 801 to 813 denote timings for checking the job table, and timings 800 to 8
Reference numeral 03 corresponds to the timing when a job event enters from the communication program 83 into the overall system control program 93, and timings 804 to 813 correspond to the timing of checking the job table.

48 to 57 are views showing the contents of the job table involved in the job processing in the server device according to the present invention, and FIGS. 48 to 57 correspond to the job table at the timings 804 to 813. The job table shows the contents just before the check. Further, the job is CLCP for outputting a document from a printer of a color laser copying device (CLC), CLCS for reading an original from a scanner of a color laser copying device (CLC), BJP for outputting a document to a printer of a bubble jet color copying device, or bubble. BJS for reading originals from scanners of jet color copiers, PDLP for outputting to printers with a built-in page description language interpreter, BITP for outputting documents to commercial bitmap printers, jobs for reading originals from commercial scanners, etc. There is.

At timing 800, a job event comes in. The content is job 1 that outputs a document to the printer of the color laser copying machine (CLC) (the content is C
LCP), the number of output pages is 3, and the priority is LE
VEL0 and BMEM are used for the interface. Looking at the job table JOBT, as shown in FIG. 48, "25" is assigned to the ID, the status is WAIT, and the end page is 0 page because this job has not been processed yet.

In the job table check at timing 804, the job of ID25 is selected and activated. At this time, the status of the job with ID 25 is changed to RUN. A new job comes in at the timing of 801.
When the processing of one page of the job with the job ID 25 is completed, the system overall control program 93 goes back to the job table. The job table JOBT at that time is shown in FIG.
Shown in. The job of ID25 is in a state of waiting for the output of one page to be finished and the next page to be processed. The end page has changed from page 0 to page 1. The newly entered job is assigned ID26, the status is WAIT, the priority is LEVEL1,
The interface is BMEM and the job is BJP. The overall system control program 93 judges from this job table JOBT and activates the processing of the second page of the job of ID25.

At this time, a paper jam occurred in the printer in the middle of the second page, and the job of ID25 could not be continued. The overall system control program 93 refers to the job table JOBT and searches for a job to be started next. The job table JOBT at that time is as shown in FIG. ID25 status is ESTOP
The priority order is LEVEL2, and the end page remains one page so as to be executed preferentially when restored. Therefore, the system overall control program 93 is I
The job of D26 is activated. When the job of ID26 finishes processing one page, the entire system control program 9
3 moves to the job table JOBT check 807. The state at this time is shown in FIG. The job of ID25 is not started because the error is not recovered even if the error check is performed. Therefore, the entire system control program 93 requests the PDL interpreter program 84 to process the second page of the job of ID26.

While the job of ID26 is processing the second page, a new job event enters the system-wide control program 93. The content is to read two pages of original document from the scanner of the bubble jet color copying apparatus. When the job of ID26 finishes processing the second page, the system-wide control program 93 checks the job table JOBT. The job table JOBT at that time is shown in FIG.

The ID 25 remains as it is because the error has not been recovered. Since the job of ID26 has completed the processing of two pages, the end page has changed to two. Further new job is assigned to ID27. I
Since the priority of the job of D27 is LEVEL2,
System-wide control program 93 is currently processing ID2
The job of No. 6 is interrupted and the job of ID27 is started.
The job of ID26 has a status of STOP and a priority of LEVEL2.

While the scanner control program 85 is reading the one-page original, the system-wide control program 93 receives a new job event at timing 80.
Comes in at 3. When the reading of one page is completed, the system overall control program 93 checks the job table JOBT at timing 809. The job table JOBT at this time is as shown in FIG. The job of ID25 remains ESTOP because the error has not been recovered. Further, since the status of the ID 26 is STOP and the interrupt job ID is 27, when the job of the ID 27 is checked, the status remains RUN and cannot be resumed. The new job is ID28
Is assigned. The job with ID 28 is a job for sending data to a commercially available printer through the Centronics interface, and can be run at the same time as the currently activated job. Therefore, the whole system control program 9
3 simultaneously starts the job of ID28 and the job of scanning the second page of ID27.

Next, the entire system control program 93 shifts to the job table JOBT check (timing 810). The job table JOBT at this time is shown in FIG. Job table JOBT check (timing 8
Since the error of the job ID 25 is canceled before 10), the status returns to WAIT after the error check.

Further, the job of ID26 also interrupts the I
Since the job of D27 is completed, the status returns to WAIT. The job with ID 28 remains in the RUN state.
The entire system control program 93 is an interface BM
Since the EM is empty, the job of ID25 or ID26 is activated. The status of both jobs is WAI
At T, since the priority is the same as LEVEL2, the job of ID25 accepted first is activated. At this time,
Since the end page of the job of ID25 is 1 page, 2
A request must be made to the PDL interpreter program 84 to process from page number.

The job table JOBT check (timing 811) follows FIG. The jobs of ID25 and ID28 have a status of RUN and ID26 of WAIT. The job of ID26 has a priority of LEVEL2 and can interrupt the job currently being started.
Since 25 is also activated by LEVEL2, it cannot interrupt in this case.

The job table JOBT check (timing 812) starts. The job table JOBT is shown in FIG.
Shown in. The job of ID25 has already been completed and deleted from the job table JOBT. Therefore, the overall system control program 93 activates the job of ID26 from the third page.

In the job table JOBT check (timing 813), since the job of ID28 is running as shown in FIG. 57, the system overall control program 93 does not newly start the job.

As described above, the overall system control program 93 optimally manages jobs while referring to the job table JOBT.

In the above embodiment, after the characters, figures, and images have been edited by the host computer, the print request communicated via the network is processed by the server device that drives the scanner / printer, and the print request is sent from the printer. Although the output has been described, as shown in FIG. 58, the client host computers 901, 9
02. In a system in which the SP server device 903 that drives the scanner / printer 904 is connected via the network 905, character and figure information transferred from the client host computers 901 and 902 and the scanner printer 904 input the information. The SP server device 903 may combine and edit the image and output the combined image.

FIG. 58 is a block diagram for explaining the configuration of the server device showing the second embodiment of the present invention.

In the figure, reference numeral 906 denotes a storage device which is provided in the SP server device 903 and stores each information of characters and figures transferred from the client host computers 901 and 902.

In the server device configured as described above, the first image information output from the image processing device to the storage means (storage device 906) provided on the main body or the network or each host connected to a predetermined network By storing the second image information transferred from the computer, the image information output processing load from each host computer is reduced and the stored image information is efficiently reused.

Further, the image synthesizing means synthesizes the first and second image information stored in the storage means (storage device 906) to generate an output image, and the image processing apparatus (scanner printer 904 in this embodiment). By outputting the image to the host computer, the image editing load on each host computer is reduced.

In this embodiment, on the client host computers 901 and 902, the operator generates character information and graphic information by using, for example, a word processor and graphic software. Generated characters,
The graphic information and the like (first image information) are stored in the network 905.
Is sent to the SP server device 903. SP
The character / graphic information received by the server device 903 is S
It is stored in the storage device 906 in the P server device 903.

On the other hand, the image information (second image information) scanned by the scanner printer 904 is also stored in the storage device 906 in the SP server device 903. Depending on the page description language running on the SP server device 903,
Character information, graphic information, and image information (image data) are stored in the storage device 906 of the SP server device 903 as shown in FIG.
Are synthesized as shown in.

FIG. 59 is a schematic diagram showing a print layout combined by the SP server device 903 shown in FIG.

In the figure, reference numeral 911 indicates a one-page area, and in this area 911, transfer information 912 such as characters and figures transferred from the client host computers 901 and 902 via the network 905 and the SP server device 903 are stored. Image information 913 scanned by the controlling scanner printer 904 is allocated according to the layout information. The information thus synthesized can be output from the printer of the SP server device 903.

The scanner / printer 904 controlled by the SP server apparatus 903 may have a single unit in which the scanner and the printer are independent. When another large-capacity storage device such as a magneto-optical disk device is connected to the SP server device 903, the image information read by the scanner of the scanner printer 904 is read into the storage device 906 in the SP server device 903 each time, and the client By constructing an image database by sequentially storing scanned images in the large-capacity storage device instead of combining and printing the character and graphic information transferred from the host computers 901 and 902, It is also possible to take out an image from a large-capacity storage device and print it while combining the image with character and graphic information.
Furthermore, the large-capacity storage device is used as the SP server device 90.
When provided separately from the third storage device 906, the large-capacity storage device and the SP server device 903 do not have to be directly connected. For example, they are arranged in the client host computers 901 and 902 connected to the network 905. Client host computer 901,
Any configuration may be used as long as 902 can be transferred to the SP server device 903.

[0371]

As described above, according to the first aspect of the present invention, when the instruction for synthesizing the data described in the page description language sent from the host via the network and the image data input by the scanner is given. Since the synthesizing unit synthesizes the bitmap data converted by the processing unit with the image data from the scanner and the synthesized image data can be transferred to the host side, the burden of resource expansion such as memory on the host side can be reduced. The composite image data of the data described in the page description language sent from the host and the image data input by the scanner can be easily used by the host side without imposing.

According to the second invention, the image data synthesized by the synthesizing means can be compressed by the compressing means and sent to the host on the network. Therefore, a large amount of synthesized image data synthesized on the server device side. Can be acquired in a short time and easily used by the host side.

Therefore, there is an excellent effect that each host on the network can easily and efficiently use the composite image data which requires the memory expansion.

[Brief description of drawings]

FIG. 1 is a system block diagram illustrating an outline of a server device according to a first embodiment of the present invention.

FIG. 2 is a system block diagram showing an outline of a network system to which the server device shown in FIG. 1 is applied.

FIG. 3 is a diagram showing a network construction state of a server device and each host according to the present invention.

FIG. 4 is a circuit block diagram illustrating a detailed configuration of a main CPU board circuit shown in FIG.

5 is a block diagram illustrating a detailed configuration of a memory clear controller illustrated in FIG.

FIG. 6 is a schematic diagram illustrating band expansion processing of image information in the band memory illustrated in FIG.

FIG. 7 is a schematic diagram illustrating band expansion processing of image information in the band memory illustrated in FIG.

8 is a block diagram illustrating a detailed configuration of an image drawing processing circuit illustrated in FIG.

9 is a block diagram illustrating an internal configuration of a first interface circuit illustrated in FIG.

10 is a block diagram showing an example of a detailed configuration of a real-time compression / decompression unit shown in FIG.

11 is a diagram showing an example of a zigzag scan path by the zigzag scanning unit shown in FIG.

12 is a block diagram illustrating an outline of a part configuration of the first SP interface circuit illustrated in FIG. 1. FIG.

13 is a circuit block diagram illustrating a detailed internal configuration of a first SP interface circuit illustrated in FIG.

14 is a circuit block diagram illustrating a detailed internal configuration of a first SP interface circuit illustrated in FIG.

FIG. 15 is a circuit block diagram illustrating a detailed internal configuration of a first SP interface circuit shown in FIG.

16 is a circuit block diagram illustrating a detailed internal configuration of a second SP interface circuit illustrated in FIG.

17 is a schematic diagram illustrating an image recording process of the scanner / printer shown in FIG.

FIG. 18 is a schematic diagram showing a document scanning state of the scanner of the scanner / printer shown in FIG.

19 is a schematic diagram showing a band document scanning state of the scanner of the scanner / printer shown in FIG.

FIG. 20 is a diagram showing an example of an interface signal between a server device and a printer according to the present invention.

FIG. 21 is a circuit block diagram showing an example of an interface between a server device and a printer according to the present invention.

FIG. 22 is a timing chart illustrating the operation of FIG. 21.

23 is a flowchart showing an example of a signal processing procedure on the host side by the Centronics I / F circuit shown in FIG. 21.

24 is a flowchart showing an example of a signal processing procedure on the printer side by the Centronics I / F circuit shown in FIG. 21.

FIG. 25 is a diagram illustrating a program configuration of a server device and a host computer according to the present invention.

FIG. 26 is a flowchart showing an example of the overall control procedure in the server device according to the present invention.

FIG. 27 is a diagram showing a main part of a code system conforming to the page description language in the server device according to the present invention.

FIG. 28 is a diagram illustrating a process of replacing an intermediate code by a layouter in the server device according to the present invention.

FIG. 29 is a schematic diagram showing a graphic information expansion processing state in a band memory in the server device according to the present invention.

FIG. 30 is a diagram illustrating a one-pixel structure of data developed by a page description language in the server device according to the present invention.

FIG. 31 is a data processing path diagram for explaining the operation of the scanner shown in FIG.

FIG. 32 is a block diagram illustrating a data processing state of the server apparatus and the color laser copying apparatus according to the present invention.

FIG. 33 is a block diagram illustrating a data processing state of the server apparatus and the color laser copying apparatus according to the present invention.

FIG. 34 is a block diagram illustrating a data processing state of the server apparatus and the bubble jet color copying apparatus according to the present invention.

FIG. 35 is a block diagram illustrating a configuration of a network system with a server device according to the present invention.

FIG. 36 is a flowchart showing an example of an abnormal job processing procedure in the server apparatus according to the present invention.

FIG. 37 is a flowchart showing an example of a retry processing procedure in the server device according to the present invention.

FIG. 38 is a timing chart illustrating a job control state in the server device according to the present invention.

FIG. 39 is a diagram showing a control processing state of the entire system control program in the server device according to the present invention.

FIG. 40 is a flowchart showing an example of an event processing procedure of the system overall control program control shown in FIG. 39.

FIG. 41 is a diagram showing a job management state in the server device according to the present invention.

FIG. 42 is a flowchart showing an example of a job execution processing procedure in the server device according to the present invention.

FIG. 43 is a flowchart showing an example of a status check processing procedure in the server device according to the present invention.

FIG. 44 is a flowchart showing an example of a priority order check processing procedure in the server device according to the present invention.

FIG. 45 is a flowchart showing an example of an interface check processing procedure in the server device according to the present invention.

FIG. 46 is a flowchart showing an example of a job activation processing procedure in the server device according to the present invention.

FIG. 47 is a timing chart showing a job processing state transition in the server device according to the present invention.

FIG. 48 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 49 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 50 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 51 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 52 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 53 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 54 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 55 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 56 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 57 is a diagram showing the contents of a job table involved in job processing in the server device according to the present invention.

FIG. 58 is a block diagram illustrating a configuration of a server device according to the second embodiment of the present invention.

FIG. 59 is a schematic diagram showing a print layout synthesized by the SP server device shown in FIG. 58.

[Explanation of symbols]

 1 Main CPU Circuit 2 Ethernet Circuit 3 JPEG Compression Circuit 11 LAN 4-1 First SP Interface Circuit 4-2 Second SP Interface Circuit 100 Copier (Scanner Printer) 200 Copier (Scanner Printer)

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 25, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Shishizuka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Makoto Takaoka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Shigetada Kobayashi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Susumu Sugiura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Masanari Toda 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yoshinobu Mita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Invention Kazuhiro Saito 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yukari Shimomura 3-30-2 Shimomaruko, Ota-ku, Tokyo Within Canon Inc. (72) Inventor Yoshikazu Yokomizo 3-30-2 Shimomaruko, Ota-ku, Tokyo Within Canon Inc. (72) Inoue Nakushi, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. In-house (72) Inventor Osamu Yamada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (2)

[Claims] 1. A server device connected to a host via a network, wherein interface means for connecting to a scanner and a printer and data described in a page description language sent from the host are converted into a bitmap. The image processing device includes a processing unit for converting, and a synthesizing unit for synthesizing the bitmap data and image data input from the scanner via the interface unit, and the image data synthesized by the synthesizing unit via the network. A server device, wherein the server device is configured to be capable of being transmitted to the host. 2. The compression means for compressing the image data synthesized by the synthesis means is provided, and the image data compressed by the compression means can be sent to the host via the network. The server device described.