JPH0635663A - Data conversion / inverse conversion device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the processing time required for data conversion and inverse conversion. [Structure] Before starting data conversion, the designation means 108
When the type of the configuration data is designated by A, first, the determining unit 132 determines whether or not the type of the configuration data used for writing to the rewritable PLD 122A previously registered in the registering unit 130 matches, and it does not match. In this case, the data writing means 128 reads the configuration data of the type specified this time from the configuration data storage means 128 and writes it in the rewritable PLD 122A, and then the starting means 120.
A activates the rewritable PLD 122A to perform data conversion. On the contrary, when the determination unit 132 determines that the data matches, the data writing unit 128 does not perform writing, and the activation unit 120 can rewrite the data as it is.
D122 is activated to perform data conversion.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a rewritable P such as FPGA.
The present invention relates to a data converter, a data inverse converter, and a data converter / inverse converter that perform data conversion such as compression and decompression using an LD and data inverse conversion, and particularly relates to one rewritable PLD and a plurality of types of configuration data. The present invention relates to a data conversion device, a data inverse conversion device, and a data conversion / inverse conversion device capable of performing plural kinds of operations by switching and writing.

In a system that handles image data, such as a facsimile communication and an image data search system, in order to save communication capacity and storage capacity, image data input by an image input device is compressed and transmitted or filed, and then received. Or decompress (decompress) the compressed data read from the file
Then, the original image data is restored and displayed on a display device or printed by a printer. In the past, data compression and decompression were performed by separate circuits, and the size of the device was large. However, from the latter half of the 1980s, by writing the logic and connection information (configuration data) inside the LSI from the outside, multiple devices can be used. Rewritable FPGA (Field Programmable Gate) that can implement any one of the seeds as many times as you like
Array) was developed, so in recent years, rewritable FP
By using GA, compression and decompression are realized by one circuit, and the device can be downsized. However, since it takes a very long time to write the configuration data to the rewritable FPGA and realize the desired logic, the device can be downsized, but the processing time is delayed. In view of such a situation, the present invention devises writing of configuration data to shorten the processing time for data conversion and inverse conversion.

[0003]

2. Description of the Related Art In facsimile communication, image data retrieval system, etc., when transmitting and receiving image data, filing, and file retrieval, data conversion of compression and decompression (decompression) and reverse conversion are performed in order to save communication capacity and storage capacity. It is generally done. When one device can perform both data conversion and inverse conversion, if a circuit is provided for each function, the device becomes large. Therefore, the configuration data for data conversion (logic and connection information embodied inside the FPGA) is written into one rewritable FPGA to form a data conversion circuit, or conversely, the configuration data for data reverse conversion is written to perform data reverse conversion. By using a circuit, the size of the device can be reduced.

FIG. 9 shows a conventional image compression / decompression device.
Reference numeral 10 is an image data input unit for reading an image from an original, 12
Is an image data holding unit that holds the image data input by the image data input unit 10 or holds the image data output by the compression / decompression unit described later, and 14 is the image held by the image data holding unit 12. An image display unit that displays images based on the data, 16 is an operation unit that performs instruction operations such as image data transmission, filing, file search, and image display, and 18 is compression / decompression process control in accordance with instructions from the operation unit. , A data processing control unit that performs transmission / reception control, filing, and file search control, 20 is a compression / decompression unit that compresses / decompresses image data in accordance with instructions from the data processing control unit, 22
Holds the image data compressed by the compression / decompression unit,
A compressed data holding unit for holding the compressed data received by the sending / receiving unit and for holding the compressed data read from the storage unit, and 24 is held in the compressed data holding unit according to an instruction from the data processing control unit. The storage unit 26 stores the compressed data in a readable and writable manner, and 26 transmits the compressed data held in the compressed data holding unit to the outside according to the instruction of the data processing control unit or receives the compressed data sent from the outside and compresses the compressed data. It is a transmission / reception unit that outputs to a data holding unit.

The compression / decompression unit 20 is constructed as shown in FIG. 10. Reference numeral 28 is a processing data holding unit for holding the instruction contents of the data processing control unit, and 30 is a data writing unit with reference to the processing data holding unit. Is a processing instructing unit for instructing to write configuration data, or for instructing a rewritable FPGA described later to start a data compression or decompression operation. 32 is a rewritable FP
It is a GA (Field Programmable Gate Array), and when the configuration data for compression is written and the internal logic for compression and wiring are determined, it functions as a compression circuit, and the configuration data for restoration is written and the data for restoration is written. When the internal logic and connection of the are determined, it functions as a restoration circuit. Reference numeral 34 is a configuration data holding unit that holds compression configuration data and decompression configuration data, and the configuration data is created in advance using an FPGA development tool. Reference numeral 36 indicates that the configuration data for compression or decompression is FPG according to the instruction of the processing instruction unit.
This is a data writing unit for writing to A.

For example, when an image original (here, one sheet is used for simplicity) is set in the image data input unit 10 and the image is read, the image data input unit 10 detects the original size and detects the original size. Is converted into binary image data of a predetermined size (line length, number of lines) corresponding to the above, and is output to the image data holding unit 12 to be temporarily stored. The image data held in the image data holding unit 12 is output and displayed on the image display unit 14, so that the operator can visually recognize the input image. When the operator gives a desired instruction on the operation unit 16 in order to perform filing or transmission of a normally read image, the data processing control unit 18
First, the compression / decompression unit 20 is instructed to perform compression processing, and the size of the image held in the data holding unit 12 is specified (specified based on the detection result of the image data input unit 10).

The contents designated and designated by the data processing control unit 18 are held in the processed data holding unit 28. Then, the processing instructing unit 30 refers to the processing data holding unit 28 and, since the current instruction is compression, instructs the data writing unit 36 to write the compression configuration data. The data writing unit 36 instructed to write sets the rewritable FPGA 32 in the program mode, reads the compression configuration data from the configuration data holding unit 34, and rewrites the FP.
The data is written in the GA 32 to implement the compression logic and connection. When the writing is completed, the data writing unit 36 notifies the processing instructing unit 30 of the completion of the writing, and the processing instructing unit 30 that has received the notification sets the rewritable FPGA 32 to the logical operation mode, resets the internal logic, and executes the processing. With reference to the data holding unit 28, the size of the image is set in the control register embodied in the rewritable FPGA 32, and a compression start command is given to start the compression operation.

By writing the compression configuration data, resetting, and setting the size of the image, the rewritable FPGA 32 is implemented with the compression circuit shown in FIG. 11, for example. The compression circuit shown in FIG. 11 performs compression by converting binary image data into patterns and run lengths for every four lines. 38-1 to 38-4 are 2 for 1 line each
It is a shift register that can hold value image data and is serially connected. Reference numerals 40-1 to 40-4 are registers that hold binary image data for one pixel, and are connected to the output side of the final stage of the shift registers 38-1 to 38-4, respectively. 42
-1 to 42-4 are EX-OR circuits (exclusive OR circuits) that take the exclusive OR of the output of the final stage of the shift register 38-i and the output of the register 40-i (i = 1 to 4) , 44 are EX-
An OR circuit that ORs the outputs of the OR 42-1 to 42-4, 46 is an INV circuit (inversion circuit) that inverts the output of the OR circuit,
Reference numeral 48 is a counter that is enabled when the output of the INV circuit is "1" and counts up according to the clock input.
When it reaches 15, a carrierup signal is output. Reference numeral 50 is a control circuit that outputs an output enable signal to the output buffer when the output of the OR circuit 44 becomes "1" or when the carrier-up signal is input from the counter 48, and the control circuit is a shift register. The clock is output to 38-1 to 38-4 and the counter 48, and the latch strobe signal is output to the registers 40-1 to 40-4. Reference numeral 52 is an output buffer circuit. When an output enable signal is input from the control circuit, 4-bit input from the registers 40-1 to 40-4 is pattern data and 4-digit from the LSB of the counter 48 is run-length data, 8-bit. The compressed code data of is output.

After the compression circuit is activated, the image data holding unit 12
The image data is input by dividing it into four lines, the compression processing is performed, the image data is output to the compressed data holding unit 22, and the data is held. Specifically, assuming that the image data is as shown in FIG. 12A (55 pixels per line), the image data divided into four lines from the image data holding unit 12 is serially input line by line. In synchronization with, the control circuit 5
0 gives a shift clock to the shift registers 38-1 to 38-4, and the first line of the four lines is shifted to the shift register 38-
The first and second lines are held in the shift register 38-2, the third line is held in the shift register 38-3, and the fourth line is held in the shift register 38-4. Subsequently, the control circuit 50 clears the counter 48 and initializes it to -1, supplies a latch strobe signal to the registers 40-1 to 40-4, and shifts each shift register at that time.
The final stage output of 38-1 to 38-4 (first pixel data of each line) is held. At this time, the shift register 38-i
Output pattern of the last stage and register 40-i (i = 1 to 4)
Output patterns are the same, the EX-OR circuits 42-1 to 42-42
The outputs of the −4 are all “0”, the output of the OR circuit 44 is “0”, and the output of the INV circuit 46 is “1”. At this time, the control circuit 50 gives a clock to the counter 48 to count up and set the count value to zero.

Next, the control circuit 50 controls each shift register 38.
One shift clock is given to -1 to 38-4 to output the second pixel data of each line from the final stage. Since there is a change in the pixel data on the first and fourth lines, EX-OR
The outputs of the circuits 42-1 and 42-4 are "1", and the EX-OR circuit 42-2 is
The output of 42-3 becomes "0", and the output of the OR circuit 44 becomes "1". At this time, the control circuit 50 outputs the output enable signal to the output buffer 52, and the registers 40-1 ...
The 1st 4-bit pattern data of each line held in 40-4 and the 1-byte code data in which the count value 0 of the counter 48 (4-bit run length data) is combined with the upper and lower sides is the external compressed data. The data is output to the holding unit 22 and held (see the coded data in FIG. 12B). continue,
The counter 48 is initialized (initial value = -1), and the register 40
A latch strobe signal is given to -1 to 40-4 to hold the output of the final stage of each shift register 38-1 to 38-4 at that time. At this time, the output of each EX-OR circuit 42-1 to 42-4 is “0”, the output of the OR circuit 44 is “0”, and the INV circuit 46.
Becomes 1 and the control circuit 50 gives a clock to the counter 48 to set the count value to 0. Next, one shift lock is applied to the shift registers 38-1 to 38-4 to output the third pixel data of each line, but the output of the EX-OR circuit 40-3 changes to " 1 ”,
Since the output of the OR circuit 44 becomes "1", the control circuit 50
Outputs the code data in which the second 4-bit pattern data of each line held in the registers 40-1 to 40-4 and the count value 0 of the counter 48 are combined.

Next, the counter 48 is initialized again, the latch strobe signal is given to the registers 40-1 to 40-4 to hold the output of the final stage of the shift registers 38-1 to 38-4, and O
Since the output of the R circuit 44 is “0” and the output of the INV circuit 46 is “1”, the control circuit 50 gives a clock to the counter 48 to set the count value to 0. Next, one shift lock is given to the shift registers 38-1 to 38-4 to output the fourth pixel data of each line, but since it does not change to the third, the output of the OR circuit 44 is "0", INV. Circuit 46
Becomes 1 and the control circuit 50 gives a clock to the counter 48 to set the count value to 1. Then, one shift clock is given to the shift registers 38-1 to 38-4 to output the fifth pixel data of each line, but this time,
Since the second line has changed, the output of the OR circuit 44 becomes "1", and the control circuit 50 causes the third 4-bit pattern data of each line held in the registers 40-1 to 40-4 and the counter. The code data including the count value 1 of 48 is output. After that, by repeating the same operation, the four lines of the original image data are output to the compressed data holding unit 22 while being compressed and converted into the 8-bit code data composed of the 4-bit pattern data and the run length data. It is held by the holding unit 22. During compression,
When the count value reaches 15, the control circuit 50 which has input the carrier-up signal, the registers 40-1 to 40-4 at that time point.
And the output of the counter 48 are combined to output code data from the output buffer 52, and the counter 48 is initialized.

When the compression of four lines is completed, the original image data of four lines shown in FIG. 12A is converted into the code data string shown in FIG. After that, the control circuit 50 checks whether there is still image data for four lines to be compressed next from the size of the image set by the processing instruction unit 30, and if there is, the same as described above. Then, the image data for the next four lines is held in the shift registers 38-1 to 38-4, and then encoded. When the processing of one image is completed, the data processing control unit 1
After adding data indicating the size of the image to the compressed data held in the compressed data holding unit 22, when the operator has instructed to send the compressed data, the sending / receiving unit 26 sends the compressed data to the outside. If filing is instructed by the operator, it is stored in the storage unit 24 in association with a predetermined file name.

On the contrary, when the sending / receiving unit 26 receives the compressed image data sent from the outside, it is once held in the compressed data holding unit 22. Data processing control unit 18
If the image display is not instructed by the operation unit 16 at the time of reception, the storage unit 24 stores it in the storage unit 24 in association with a predetermined file name. Then, after that, when a file search accompanied by the designation of the file name is instructed by the operation unit 16, the data processing control unit 18 reads the corresponding compressed data from the storage unit 24,
The compressed data holding unit 22 holds the compressed data once. Then, the data indicating the size of the image added to the compressed data is read out, the decompression process is instructed to the compression / decompression unit 20, and the size of the image held in the compressed data holding unit 22 is specified. If an image display is instructed by the operation unit 16 at the time of reception, the data processing control unit 18 causes the storage unit 24 to operate.
The decompression process is instructed to the compression / decompression unit 20 without filing to the compressed data storage unit 2
Specifies the size of the image held in 2.

The contents designated and designated by the data processing control unit 18 are held in the processed data holding unit 28. Then, the processing instructing unit 30 refers to the processing data holding unit 28, and since the present instruction is restoration, instructs the data writing unit 36 to write the restoration configuration data. The data writing unit 36 instructed to write sets the rewritable FPGA 32 in the program mode, reads the restoration configuration data from the configuration data holding unit 34, and rewrites the FP.
The data is written in the GA 32 to embody the restoration logic and connection. When the writing is completed, the data writing unit 36 notifies the processing instructing unit 30 of the completion of the writing, and the processing instructing unit 30 that has received the notification sets the rewritable FPGA 32 to the logical operation mode, resets the internal logic, and executes the processing. Referring to the data holding unit 28, the size of the image is set in the control register, and a restoration start command is given to start the restoration operation.

The rewriting circuit shown in FIG. 13 is implemented in the rewritable FPGA 32 by writing, resetting, and setting the image size of the reconstructing configuration data. The restoration circuit of FIG. 13 restores image data from code data composed of 4-bit pattern data and 4-bit run length data. Reference numeral 54 is an input buffer circuit that receives code data from the compressed data holding unit 22 byte by byte, 56-1 to 56-4 are registers that hold 4-bit pattern data of the code data bit by bit, 58
Is a counter in which run length data of the code data is preset, and counts down according to the clock. Reference numerals 60-1 to 60-4 are shift registers for holding the data held in the registers 56-1 to 56-4 while shifting them, and 62 is an image of four lines held in the shift registers 60-1 to 60-4. A FIFO memory 64 for storing data and outputting it to the outside is a control circuit for outputting a latch strobe signal to the registers 56-1 to 56-4 and outputting a preset strobe signal or a clock to the counter 58. , Give a shift clock to the shift registers 60-1 to 60-4,
It controls writing / reading to / from the FIFO memory.

Now, assuming that the restoration target is one image,
The input code data string for the first four lines is shown in FIG.
In the case of (a), the control circuit 64 causes the input buffer circuit 54 to output the first 1-byte code data, and then applies the latch strobe signal to the registers 56-1 to 56-4 to output 1-bit pattern data. The second code data is output from the compressed data holding unit 22 to the input buffer circuit 54 while being held separately. Then, the preset strobe signal is given to the counter 58 to preset the run length data 0. Then counter 5
8 and the shift registers 60-1 to 60-4 in synchronization with each other, and the count value of the counter 58 is reduced by -1.
Stop the clock output. When the run length data is 0, only one clock is given,
The patterns held in the registers 56-1 to 56-4 are shifted to the first stage of the shift registers 60-1 to 60-4. Next, the next pattern data and run length data 0 held in the buffer memory 54 are held in the registers 56-1 to 56-4 and are preset in the counter 58, and the third code data from the compressed data holding unit 22 is stored. It is output to the input buffer circuit 54. Then, a clock is given to the counter 58 and the shift registers 60-1 to 60-4, and the patterns held in the registers 56-1 to 56-4 are transferred to the shift register 60.
-1 Shift to the first stage of 60-4. When one clock is given, the count value of the counter 58 becomes -1, so the clock output is stopped.

Subsequently, the next pattern data and run length data 1 held in the buffer memory 54 are registered.
The data is held in 56-1 to 56-4 and preset in the counter 58 to output the fourth code data from the compressed data holding unit 22 to the input buffer circuit 54. And
A clock is given to the counter 58 and the shift registers 60-1 to 60-4 to shift the pattern held in the registers 56-1 to 56-4 to the first stage of the shift registers 60-1 to 60-4. Here, since the run length data is 1, when the two clocks are given, the count value of the counter 58 becomes -1,
The third pattern data is held in the first and second stages of the shift registers 60-1 to 60-4. Thereafter, the same processing is repeated, and if the image data for one line can be restored in each of the shift registers 60-1 to 60-4, the control circuit 64 causes the FIFO
The lines are sequentially output to the image data holding unit 12 via the O memory 62 line by line and held in the image data holding unit.

When the restoration of four lines is completed, FIG.
The code data string shown in (a) is restored to the image data shown in (b). Thereafter, the control circuit 64 causes the processing instruction unit 3
It is checked whether there is still compressed image data to be restored next from the size of the image designated by 0, and if there is remaining, it is restored while inputting the coded data in the same manner as described above. Go. Then, when the processing of all the one image is completed, the data processing control unit 18 causes the image display unit 14 to output the image data of the image data holding unit 12 so that the operator can visually recognize it.

[0019]

As described above, by writing the compression configuration data or the decompression configuration data to the rewritable FPGA 32 and embodying the compression logic or the decompression logic, one rewritable FPGA 32 can be used. The functions of both the compression circuit and the decompression circuit can be achieved, and the configuration can be made smaller than the case where a separate circuit is provided for each processing content. However, since it takes a long time to write the configuration data itself, the FPGA is required each time a certain process is instructed.
Writing the configuration data to 32 to realize the desired logic does not have much effect when the processing amount of one time is large, but there is a problem that the processing time is delayed when the processing amount of one time is small. It was In view of the above, an object of the present invention is to provide a data conversion device, a data inverse conversion device, and a data conversion / inverse conversion device that can devise writing of configuration data to reduce the processing time in data conversion and inverse conversion. .

[0020]

FIG. 1 is a diagram for explaining the principle of the present invention. Reference numeral 122A denotes a rewritable PLD for writing configuration data, which enables a data conversion operation according to the type of the configuration data, 124 denotes a configuration data storage means for storing a plurality of types of configuration data for data conversion, 120
A is an activating means for activating the rewritable PLD to perform a predetermined data conversion operation, and 128 is a means for activating the rewritable PLD based on information indicating the type of the configuration data specified by the predetermined specifying means 108A before starting the data conversion The configuration data of the type specified by the information can be read from the configuration data storage means and rewritten.
Data writing means to be written in D, 130 is a registration means for registering information indicating the type of configuration data previously written in the rewritable PLD, and 132 is a kind of configuration data designated by the present designating means and the registration means. It is a judging means for judging whether the type of match or mismatch has occurred.

[0021]

Operation: Before starting the data conversion, the designation means 108A
When the type of configuration data is specified in,
First, the determination unit 132 determines whether the type of the previous configuration data registered in the registration unit 130 and the type designated this time match / mismatch. When it is determined that they do not match, the data writing unit 128 reads out the configuration data specified this time from the configuration data storage unit 124 and writes it in the rewritable PLD 122A, and then the activation unit 120A can rewrite the PLD1.
22A is activated to perform data conversion. On the contrary, when the determination unit 132 determines that the data matches, the data writing unit 128 does not write the data, and the activation unit 120 can rewrite the data as it is.
To start data conversion.

With this configuration, a plurality of types of data conversion can be performed by one rewritable PLD 122A, and the configuration of the data conversion device can be made smaller than that in the case where a dedicated data conversion circuit is provided for each type, and further, some When the type of processing is instructed, if the same instruction as the previous time is given, the processing can be started without writing the configuration data, so that the processing time can be shortened.

Configuration data is prepared in the configuration data storage means for each data conversion method and for each version within the same method, and the specific type of configuration data is prepared by the specific data conversion method. , And point to a specific version of the data. As a result, it is possible to perform data conversion processing for each data conversion method and for each version.

A rewritable PLD capable of performing a data reverse conversion operation in a predetermined method according to the type of configuration data by writing the configuration data.
And configuration data storage means for storing a plurality of types of configuration data for data inverse conversion, activation means for activating the rewritable PLD to perform data inverse conversion operation of a predetermined method, and data inverse conversion. Data having data writing means for reading the configuration data of the type designated by the information from the configuration data storing means and writing the rewritable PLD on the basis of the information indicating the type of the configuration data previously designated by the designating means In the inverse conversion device, a registration unit that registers information indicating the type of configuration data written in the rewritable PLD, and a match / mismatch between the type of configuration data designated by the designation unit and the type registered in the registration unit. Judgment means and data are provided The writing means writes the data only when the determination means determines that they do not match, and the activation means configures the rewritable PLD by the data writing means when the determination means determines that they do not match. After the data writing is completed, the rewritable PLD is activated to perform the data reverse conversion, and when the determination means determines that they match, the rewritable PLD is used as it is.
To start the reverse data conversion. Thereby, a plurality of types of data inverse conversion can be performed by one rewritable PLD, and the configuration of the data inverse conversion device can be made smaller than the case where a dedicated data inverse conversion circuit is provided for each type. When the type of processing is instructed, if the same instruction as the previous time is given, the processing can be started without writing the configuration data, so that the processing time can be shortened.

Configuration data is prepared in the configuration data storage means for each data reverse conversion method and for each version within the same method, and the specific type of configuration data is stored in the specific data conversion method. And point to a specific version of the data. As a result, it is possible to perform the data reverse conversion process for each data reverse conversion method and for each version.

Information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion is included in the conversion data in advance, and the data reverse conversion is performed. Before starting, the information indicating the type of configuration data used in the conversion or the information indicating the type of configuration data to be used in the reverse conversion is extracted from the conversion data, and based on the extracted information, the designating means Specifies the type of configuration data. This allows
The operator does not need to specify the type of configuration data used for the reverse conversion when performing the reverse conversion of data.

A rewritable PLD capable of performing a predetermined operation in any one of a data conversion operation and a data inverse conversion operation according to the type of the configuration data by writing the configuration data, and one or a plurality of data conversion operations. Type configuration data and a configuration data storage means for storing one or more types of configuration data for data inverse conversion, and a rewritable PLD are activated to perform a predetermined data conversion operation or data inverse conversion operation. Based on the starting means and the information indicating the type of the configuration data specified by the predetermined specifying means before starting the data conversion or the data reverse conversion, the configuration data of the type specified by the information is stored in the configuration data. PL that can be rewritten by reading from the means In a data conversion / inverse device having a data writing means for writing to a rewritable PLD, a registration means for registering information indicating the type of configuration data written in a rewritable PLD, and a type and a registration means for the configuration data designated by the designating means The data writing means writes the data only when the judging means judges that there is a mismatch, and the starting means does not match the judging means. When it is determined that the data writing means has completed writing the configuration data to the rewritable PLD, the rewritable PLD is activated to perform data conversion or data reverse conversion, and when the determination means determines that they match, Rewritable PLD is started as it is and data conversion or reverse conversion is performed. That. As a result, one or a plurality of types of data conversion and one or a plurality of types of data inverse conversion can be performed by one rewritable PLD, rather than providing a dedicated data conversion circuit or data inverse conversion circuit for each type. The configuration of the data conversion / inverse conversion device can be made small, and when a certain type of processing is instructed, the processing can be started without writing the configuration data if the same instruction as the previous time is given. Therefore, the processing time is short.

In the configuration data storage means, the configuration data is prepared for each data conversion method and for each version within the same method, and also for each data reverse conversion method and within the same method. Prepared for each version, and the specific type of configuration data points to the data of the specific version by the specific data conversion method or the data reverse conversion method. By this, by data conversion method, and
It is possible to perform data conversion processing for each version, and it is also possible to perform data inverse conversion processing for each version and for each data inverse conversion method.

Information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion should be included in the conversion data converted by the rewritable PLD. Then, before starting the data reverse conversion, information indicating the type of configuration data used in the conversion or information indicating the type of configuration data to be used in the reverse conversion is extracted from the converted data, and the extracted information is extracted. Based on the above, the specifying means specifies the type of configuration data. As a result, the operator does not need to manage the type of configuration data used for data conversion and, when performing reverse conversion, do not have to specify the type of configuration data used for reverse conversion.

A part of the rewritable PLD includes data capable of forming a holding part for holding the information indicating the type of the configuration data in a readable manner, and the holding part replaces the registration means. As a result, it is not necessary to provide a registration means outside the rewritable PLD, and the size of the device can be further reduced.

[0031]

2 is a block diagram of an embodiment of the present invention, in which the same parts as those in FIG. 1 are designated by the same reference numerals. It should be noted that FIG. 2 shows a data compression / decompression device capable of performing a plurality of types of compression and a plurality of types of decompression with one rewritable PLD. Reference numeral 100 denotes an image data input unit for reading an image from a document, and 102 denotes an image data holding unit for holding the image data input by the image data input unit 100 and for holding the image data output from the compression / decompression unit described later. Reference numeral 104 denotes an image display unit that displays an image based on the image data held by the image data holding unit 102. Reference numeral 106 denotes image data transmission, filing, file search, image display, compression method and version designation, decompression method and version. An operation unit for performing an instruction operation such as specification of a file, a data processing control unit 108 for performing compression / decompression process control, transmission / reception control, filing, and file search control according to an instruction from the operation unit, and 110 an instruction of the data processing control unit. A compression / decompression unit for compressing / decompressing image data according to
Reference numeral 112 denotes a compressed data holding unit that holds image data compressed by the compression / decompression unit, and holds compressed data received by the transmission / reception unit, and 114 indicates a compressed data holding unit according to an instruction from the data processing control unit. The storage unit readable and writable stores the compressed data stored in the storage unit 116. The storage unit 116 transmits the compressed data stored in the compressed data storage unit to the outside or receives the compressed data transmitted from the outside according to the instruction of the data processing control unit. Then, it is a sending / receiving unit that outputs the compressed data to the holding unit.

The compression / decompression unit 110 is configured as shown in FIG. 3. Reference numeral 118 is a processing data holding unit that holds the instruction content of the processing control unit, and 120 is a processing data holding unit, and the determination unit makes a determination. A processing instruction unit 122 for giving an instruction, for giving an instruction to a data writing unit to write configuration data, and for giving an instruction to a rewritable FPGA described later to start a data compression or decompression operation, 122 is a rewritable FPGA (Field Programmable G
ate Array), and one of the compression configuration data is written among multiple types classified by compression method and version for each compression method.
When the internal logic for compression and the connection are determined, it functions as a compression circuit according to a predetermined compression method and version, and any one of a plurality of types classified by the restoration method and the version for each restoration method is selected. When the type of restoration configuration data is written and the restoration internal logic and connection are determined, it functions as a restoration circuit in a predetermined restoration method and version.

Reference numeral 124 denotes a plurality of types of compression configuration data classified by compression method and version for each compression method, and a plurality of types classified by decompression method and by version for each decompression method. It is a configuration data storage unit that stores the configuration data for restoration of. As shown in FIG. 4, the configuration data is a combination of compression configuration data of the same method and version and configuration data for decompression, and a compression method of a certain compression method and version is used. The compressed data can be restored by using the corresponding restoration method and the configuration data for restoring the version. Here, the compression method is uppercase alphabet, the version in each compression method is distinguished by the numerical value of 1 to n, the restoration method is lowercase alphabet, and the version in each restoration method is distinguished by the numerical value of 1 to n. I shall. The type of the compression configuration data is specified as a combination of uppercase alphabets indicating the method and numerical values indicating the version, for example, A1. Also,
The type of decompression configuration data is specified by combining a lower case alphabet indicating a method and a numerical value indicating a version, for example, a1 (paired with A1 for compression). The configuration data for each type is obtained by using the FPGA development tool. Since the configuration data storage unit 124 is an external storage device, it is possible to easily change the configuration data to another type.

Reference numeral 126 is a data buffer unit for temporarily holding a certain type of configuration data read from the configuration data storage unit 124, 12
A data writing unit 8 reads out one desired type of configuration data from the configuration data storage unit 124, temporarily holds it in the data buffer unit 126, and sets the rewritable FPGA 122 in the program mode to write the configuration data. ,
Reference numeral 130 denotes a registration unit that registers information indicating the type of configuration data that the data writing unit has recently written, and 132 indicates that the processing content instructed by the data processing control unit 108 matches the content registered in the registration unit. The determination unit that determines the non-coincidence and outputs the determination result to the processing instruction unit 120.

5 to 7 are flowcharts showing the processing of the image compression / decompression device, and FIG. 8 is an explanatory diagram of information added to the compressed data after compression, which will be described below with reference to these figures. . Initially, the registration unit 130 is cleared, and the information indicating the type of configuration data is not registered.

[0036] For simplicity in the compression processing image data input unit 100 a document (here 1
When the number of sheets is set to "1" and the image is read, the image data input unit 100 detects the size of the document and outputs binary image data of a predetermined size (line length, number of lines) according to the size of the document. Image data holding unit 1
02 for temporary storage (step 10 in FIG. 5).
1, 102). The image data held in the image data holding unit 102 is output and displayed on the image display unit 104, so that the operator can visually recognize the input image (step 10).
3). For example, in order to perform filing on a normally read image, if the operator gives a filing instruction using the operation unit 106 and specifies the compression method and version as A3 (step 104), the data processing control unit 108. First, the compression / decompression unit 110 is instructed to perform compression processing, the compression method and version are designated as A3, and the size of the image held in the data holding unit 102 is designated (step 105). The contents instructed and designated by the data processing control unit 108 are held in the processed data holding unit 118.

Then, the processing instructing unit 120 refers to the processing data holding unit 118, and supplies the determination unit 132 with information (information indicating the type of configuration data) A3 indicating the type of processing content instructed this time, It is determined whether or not it matches the registered content of the registration unit 130 (step 106). Initially, since the information indicating the type of configuration data is not registered in the registration unit 130, the determination unit 132 determines that they do not match and outputs the result to the processing instruction unit 120. In response to the determination result that they do not match, the processing instruction unit 120 instructs the data writing unit 128 to write the compression configuration data of the instructed type (A3) this time,
The data writing unit 128, which is instructed to write, searches the configuration data storage unit 124 for a corresponding type of compression configuration data, causes the data buffer unit 126 to read the data, and rewrites the FPG.
A122 is set to the program mode, and the data buffer unit 1
The compression configuration data is read from 26 and written in the rewritable FPGA 122 to implement the compression logic and connection corresponding to A3 (step 10).
7).

When the writing is completed, the data writing unit 128 registers the information A3 indicating the type of the configuration data written in the rewritable FPGA 122 this time in the registration unit 130 (step 108), and the writing completion is instructed by the processing instruction unit. The process instructing unit 120, which has received the notification, sets the rewritable FPGA 122 to the logical operation mode, resets the internal logic, and refers to the process data holding unit 118 to set the image size in the control register. Set and give a compression start command to start the compression operation (step 109, step 201 in FIG. 6).

When the compression processing of all the images for one image is completed, the data processing control unit 108 includes information indicating the size of the image in the compressed data held in the compressed data holding unit 102, and this time, After adding information (A3) indicating the type of configuration data used for compression (steps 202, 203, see FIG. 8), it is stored in the storage unit 114 in association with a predetermined file name (step 11).
1, 204, 205). It should be noted that when the operator has previously instructed the transmission, the transmitting / receiving unit 116 is caused to transmit the compressed data to the outside (steps 204, 20).
6).

After that, the operator again sets one original in the image data input unit 100 to read an image, gives an instruction for filing or transmission by the operation unit 106, and specifies the compression method and version (step 101 to 104), the data processing control unit 108 instructs the compression / decompression unit 110 to perform compression processing, specify the compression method and version, and specify the size of the image held in the data holding unit 102 (step 105). . The contents instructed and designated by the data processing control unit 108 are held in the processed data holding unit 118. Then, the processing instruction unit 12
0 passes the instruction content to the determination unit 132, and determines whether it matches the type of the configuration data written in the rewritable FPGA 122 last time (step 106).
If the instruction content is A3 this time as well, the determination unit 132 determines that they match, and in this case, the processing instruction unit 1
The reference numeral 20 resets the internal logic without giving a writing instruction to the data writing unit 128, sets the image size in the control register by referring to the processing data holding unit 118, and gives a compression start command. , Start compression operation (step 109,
Step 201 in FIG. 6).

If the instruction content this time is different from A3, for example, if it is B1, the determination unit 13 at step 106.
In this case, the process instruction unit 12
0 instructs the data writing unit 128 to write the compression configuration data (type B1).
The data writing unit 128, which is instructed to write, searches the configuration data storage unit 124 for a corresponding type of compression configuration data, causes the data buffer unit 126 to read the data, and rewrites the FPG.
A122 is set to the program mode, and the data buffer unit 1
The compression configuration data is read from 26 and written in the rewritable FPGA 122 to implement the compression logic and connection corresponding to B1 (step 10).
7).

When the writing is completed, the data writing unit 128 registers the information B1 indicating the type of the configuration data written in the rewritable FPGA 122 this time in the registration unit 130 (step 108), and the writing ending process is instructed. The process instructing unit 120, which has received the notification, sets the rewritable FPGA 122 to the logical operation mode, resets the internal logic, and refers to the process data holding unit 118 to set the image size in the control register. Set and give a compression start command to start the compression operation (step 109, step 201 in FIG. 6).

When the image compression for one image is completed, the data processing control unit 108 includes information indicating the size of the image in the compressed data held in the compressed data holding unit 102 and the configuration data used for the current compression. After adding information indicating the type (step 203), it is stored in the storage unit 114 in association with a predetermined file name or transmitted to the outside (step 204, 205 or 206).

Decompression Processing On the contrary, when the sending / receiving unit 116 receives the compressed image data sent from the outside, it is once held in the compressed data holding unit 112 (steps 110 and 11 in FIG. 5).
1). It should be noted that the received compressed image data is added with information indicating the size of the image and information indicating the compression method and version used in the compression (see FIG. 8). The data processing control unit 108 receives the image display instruction from the operation unit 106 at the time of reception (N in step 112).
O) is stored in the storage unit 114 in association with a predetermined file name (step 113). Then, after that, when a file search accompanied by the designation of a file name is instructed by the operation unit 106, the data processing control unit 108 reads the corresponding compressed data from the storage unit 114 and temporarily holds the compressed data holding unit 112 ( Steps 301 and 30 of FIG.
2). Then, the information indicating the size of the image added to the compressed data and the information indicating the compression method and version used at the time of compression are extracted (step 303), and the compression / decompression unit 1 is extracted.
The decompression process is instructed to 10, the decompression method and the version are designated based on the information extracted from the compressed data, and the size of the image is designated (step 304). For example, when the information indicating the type of configuration data attached to the compressed data is A3, the decompression method and the version are designated to the compression / decompression unit 110 as a3.

If the operation unit 106 is instructed to display an image at the time of reception, the data processing control unit 108 instructs the compression / decompression unit 110 to perform the decompression process without filing the data in the storage unit 114. In addition, specify the restoration method and version based on the additional information of the compressed data,
Specify the size of the image (YE in step 112 of FIG. 5)
S, steps 303 and 304 in FIG. 7).

The contents designated and designated by the data processing control unit 108 are held in the processed data holding unit 118.
Then, the processing instruction unit 120 causes the processing data holding unit 1118
With reference to this information, information indicating the type of configuration data instructed this time, for example, a3, is provided to the determination unit 132 to determine whether or not it matches the registered content of the registration unit 130 (step 305). Here, when the information indicating the type of the configuration data written in the rewritable FPGA 122 previously registered in the registration unit 130 is B1, the determination unit 132 determines that they do not match and outputs the result to the processing instruction unit 120. . In response to the determination result that they do not match, the processing instruction unit 120 instructs the data writing unit 128 to write the restoration configuration data (type a3). Data writing unit 12 instructed to write
The reference numeral 8 searches the configuration data storage unit 124 for a corresponding type of decompression configuration data and causes the data buffer unit 126 to read the rewritable FPGA 122 in the program mode, and the data buffer unit 126 sets the compression configuration. Read the calibration data and write it to the rewritable FPGA 122.
The compression logic and connection corresponding to 3 are implemented (step 306).

When the writing is completed, the data writing unit 128 registers the information a3 indicating the type of the configuration data written in the rewritable FPGA 122 this time in the registration unit 130 (step 307), and the writing completion is instructed by the processing instruction unit. The process instructing unit 120, which has received the notification, sets the rewritable FPGA 122 to the logical operation mode, resets the internal logic, and refers to the process data holding unit 118 to set the image size in the control register. Set and give a restore start command to start the restore operation (steps 308, 3).
09). When the restoration processing for all the images for one image is completed, the data processing control unit 108 causes the image data holding unit 10
The image data held in No. 2 is displayed on the image display unit 104 so that the operator can visually recognize it (step 31).
0, 311).

Thereafter, when the compressed image data data is received again from the outside and the image display is instructed by the operation unit 106 at the time of reception, the data processing control unit 108 adds the compressed data in the compressed data holding unit 112. The information indicating the size of the compressed image and the information indicating the compression method and version used at the time of compression are extracted, and the decompression process is instructed to the compression / decompression unit 110, and decompression is performed based on the information extracted from the compressed data. A method and a version are designated, and an image size is designated (steps 110, 111, 11 in FIG. 5).
2, steps 303 and 304 in FIG. 7). The contents instructed and designated by the data processing control unit 108 are held in the processed data holding unit 118.

Then, the processing instruction unit 120 transfers the instruction content to the determination unit 132, and determines whether or not it matches the type of the configuration data written in the rewritable FPGA 122 last time. This time when the instruction content was a3,
The determination unit 132 determines that they match. In this case, the processing instruction unit 120 resets the internal logic without giving a write instruction to the data writing unit 128, and refers to the processing data holding unit 118 to refer to the image. Is set in the control register and a compression start command is given to start the decompression operation (steps 305, 308, 309).

If the instruction content this time is different from a3, for example, b1, the determination unit 132 determines that they do not match. In this case, the processing instruction unit 120 instructs the data writing unit 128 to perform compression. Instruct to write the configuration data (type b1) (NO in step 305). Data writing unit 128 instructed to write
Searches the configuration data storage unit 124 for a corresponding type of compression configuration data and causes the data buffer unit 126 to read the rewritable FPGA 122 in the program mode. Read the data, write it to the rewritable FPGA 122, and b1
The restoration logic and wiring corresponding to are implemented (step 306).

When the writing is completed, the data writing unit 128 registers the information b1 indicating the type of the configuration data written in the rewritable FPGA 122 this time in the registration unit 130 (step 307), and the writing completion is instructed by the processing instruction unit. The process instructing unit 120, which has received the notification, sets the rewritable FPGA 122 to the logical operation mode, resets the internal logic, and refers to the process data holding unit 118 to set the image size in the control register. Set and give a restore start command to start the restore operation (steps 308, 3).
09). Then, when the image restoration for one image is completed, the data processing control unit 108 causes the image display unit 104 to display an image based on the image data held in the image data holding unit 102 (steps 310 and 311).

According to this embodiment, a plurality of types of compression and a plurality of types of decompression can be performed by one rewritable FPGA 122, and compression / decompression is performed rather than providing a dedicated compression circuit or decompression circuit for each type. The device can be downsized, and when a certain type of processing is instructed, if the same instruction as the previous time is given, the processing can be started without writing the configuration data. It can be short. Further, in the configuration data storage unit 124, compression configuration data is prepared for each compression method and for each version within the same method, and the recovery configuration data is restored for each version and within the same method. Separately prepared, a certain type of configuration data is pointed to a specific version by a specific compression method or decompression method, so that it is possible to perform data compression processing for each compression method and version.
It becomes possible to restore data according to the restoration method and version.

Furthermore, information indicating the type of configuration data used for compression is added to the compressed data compressed by the rewritable FPGA 122,
Then, before starting the data decompression, the data processing control unit 108 extracts the information indicating the type of the configuration data used for compression from the compressed data held in the compressed data holding unit 112, and the extracted information is extracted. Since the type of the configuration data for restoration corresponding to the information is specified based on the information, the restoration can be performed when the operator manages the type of configuration data used for data compression or restores. Eliminates the need to specify the type of configuration data to use.

In the above embodiment, the information indicating the type of configuration data used for compression is added to the compressed data. However, information indicating the type of configuration data to be used for restoration (for example, , A3) may be added if compressed by A3. In addition, the configuration data storage unit 12
Each of the configuration data stored in 4 includes data capable of forming a holding portion for holding the information indicating the type of the configuration data in a rewritable FPGA in a part of the rewritable FPGA. If the registration unit (130) is used in place of the rewritable FPGA, it is not necessary to provide the registration unit outside the rewritable FPGA, and the size of the device can be further reduced.

Further, in the above-described embodiment, a plurality of types of compression and a plurality of types of decompression can be performed, but it is also possible to use only one type each, and a plurality of types of compression / decompression devices are not required. It may be a compression device capable of compression processing or a decompression device capable of decompressing a plurality of types. Further, another encoding / decoding device may be used as an example of the data conversion / inverse conversion device. Although the rewritable FPGA has been described as an example of the rewritable PLD, other types of devices such as a RAM and a rewritable ROM can be used as long as data conversion and reverse conversion are possible. Although the present invention has been described above with reference to the embodiments and modifications, the present invention can be modified in various ways in accordance with the gist of the present invention described in the claims.
The present invention does not exclude these.

[0056]

As described above, according to the present invention, a rewritable PLD capable of performing a data conversion operation according to the type of configuration data by writing the configuration data, and a plurality of types of configuration data for data conversion The configuration data storage means, the activation means for activating the rewritable PLD to perform a predetermined data conversion operation, and the type of configuration data specified by the predetermined specification means before starting the data conversion. A data conversion device having data writing means for reading the configuration data of the type specified by the information from the configuration data storage means and writing the rewritable PLD on the basis of the indicated information,
A registration means for registering information indicating the type of configuration data written in the rewritable PLD last time, and a match / mismatch between the type of configuration data designated by the designating means this time and the type registered in the registration means are determined. The determining means is provided, the data writing means writes the data only when the determining means determines that they do not match, and the starting means rewrites the data by the data writing means when the determining means determines that they do not match. Possible P
After the completion of writing the configuration data to the LD, the rewritable PLD is activated to perform the data conversion, and when the determination means determines that they match, the rewritable PLD is activated to perform the data conversion. Therefore, it is possible to rewrite multiple types of data in one PLD70.
The configuration of the data conversion device can be made smaller than that of providing a dedicated data conversion circuit for each type, and when a certain type of processing is instructed, the same instruction as the previous time can be used. In this case, the processing can be started without writing the configuration data, which shortens the processing time.

Configuration data is prepared in the configuration data storage means for each data conversion method and for each version within the same method, and a specific type of configuration data is converted to a specific data conversion method. Since the data of a specific version is indicated by the method, it is possible to perform the data conversion process for each data conversion method and for each version.

A rewritable PL that enables the data reverse conversion operation in a predetermined method according to the type of the configuration data by writing the configuration data.
D, configuration data storage means for storing a plurality of types of configuration data for data inverse conversion, activation means for activating a rewritable PLD to perform a data inverse conversion operation of a predetermined method, and starting data inverse conversion Before writing, based on the information indicating the type of the configuration data designated by the designating means, the data writing means for reading the configuration data of the type designated by the information from the configuration data storage means and writing it in the rewritable PLD is provided. In the data reverse conversion device, a registration unit that registers information indicating the type of configuration data written in the rewritable PLD, and a match / mismatch between the type of configuration data specified by the specifying unit and the type registered in the registration unit. A determination means for determining The writing unit writes the data only when the determination unit determines that the data does not match, and the activation unit, when the determination unit determines that the data does not match, the configuration data to the rewritable PLD by the data writing unit. After the writing is completed, the rewritable PLD is activated to perform the data reverse conversion, and when the determining means determines that they match, the rewritable PLD is directly used.
Since it is configured to start the data reverse conversion, a plurality of types of data reverse conversion can be performed by one rewritable PLD, and it is possible to perform data reverse conversion rather than providing a dedicated data reverse conversion circuit for each type. The conversion device can be downsized, and if a certain type of processing is instructed, the processing can be started without writing the configuration data if the same instruction as the previous time is given. Can be short.

In the configuration data storage means, the configuration data is prepared for each data reverse conversion method and for each version within the same method, and the specific type of configuration data is the specific data. Since the conversion method is used to point to the specific version of the data, the data reverse conversion process can be performed for each data reverse conversion method and for each version.

Further, the conversion data should include in advance information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion. Before starting reverse conversion, information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion is extracted from the conversion data, and the designating means extracts the extracted information. Based on
Since it is configured to specify the type of configuration data, it becomes unnecessary for the operator to specify the type of configuration data used in the reverse conversion when performing the reverse conversion of the data.

Further, by writing the configuration data, a rewritable PLD capable of performing a predetermined operation in any one of a data conversion operation and a data inverse conversion operation according to the type of the configuration data, and a data conversion 1
Alternatively, a plurality of types of configuration data and a configuration data storage unit that stores one or more types of configuration data for data reverse conversion,
An activation means for activating the rewritable PLD to perform a predetermined data conversion operation or a data inverse conversion operation, and a type of configuration data specified by a predetermined specification means before starting the data conversion or the data inverse conversion are shown. A rewritable PL is provided in a data conversion / inversion device having a data writing unit that reads configuration data of a type specified by the information from the configuration data storage unit and writes the rewritable PLD based on the information.
The registration means for registering the information indicating the type of the configuration data written in D, and the determination means for determining whether the type of the configuration data designated by the designating means and the type registered in the registering means match or do not match are provided. The data writing unit writes the data only when the determination unit determines that the data does not match, and the activation unit configures the rewritable PLD by the data writing unit when the determination unit determines that the data does not match. After the completion of writing the relation data, the rewritable PLD is activated to perform the data conversion or the data reverse conversion, and when the determination means determines that they match, the rewritable PLD is used as it is.
Is configured to perform data conversion or inverse conversion, one or more types of data conversion and one or more types of data inverse conversion can be performed by one rewritable PLD. It is possible to make the configuration of the data conversion / inverse conversion apparatus smaller than providing a dedicated data conversion circuit or data inverse conversion circuit in the above, and when a certain type of processing is instructed, Since the processing can be started without writing the configuration data, the processing time can be shortened.

Further, the configuration data storage means prepares the configuration data for each data conversion method and for each version within the same method, and also for each data reverse conversion method and the same method. Prepared for each version within, and the specific type of configuration data is configured by a specific data conversion method or a data reverse conversion method, and is configured to point to a specific version of the data. And,
It is possible to perform data conversion processing for each version, and it is also possible to perform data inverse conversion processing for each version and for each data inverse conversion method.

In addition, the conversion data converted by the rewritable PLD should include information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion. Then, before starting the data reverse conversion, the information indicating the type of the configuration data used in the conversion or the information indicating the type of the configuration data to be used in the reverse conversion is extracted from the conversion data, and the designation means is Since it is configured to specify the type of configuration data based on the extracted information, it is used in reverse conversion when the operator manages the type of configuration data used for data conversion or when performing reverse conversion. You do not need to specify the type of configuration data to use.

In addition, the configuration data includes data capable of forming a holding portion for holding the information indicating the type of the configuration data in a rewritable manner in a part of the rewritable PLD. Rewritable because it is configured to replace the registration means
There is no need to provide registration means outside the LD,
The size of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is a configuration diagram of a compression / decompression unit.

FIG. 4 is an explanatory diagram of data stored in a configuration data storage unit.

FIG. 5 is a first flowchart showing the processing of the image compression / decompression device.

FIG. 6 is a second flowchart showing the processing of the image compression / decompression device.

FIG. 7 is a third flowchart showing the processing of the image compression / decompression device.

FIG. 8 is an explanatory diagram of information added to compressed data.

FIG. 9 is an overall configuration diagram of a conventional image compression / decompression device.

FIG. 10 is a configuration diagram of a compression / decompression unit.

FIG. 11 is a configuration diagram showing an example of a compression circuit implemented by a rewritable FPGA.

FIG. 12 is an explanatory diagram of a compression process.

FIG. 13 is a configuration diagram showing an example of a restoration circuit implemented by a rewritable FPGA.

FIG. 14 is an explanatory diagram of a restoration process.

[Explanation of symbols]

 108 data processing control section 108A instruction means 110 compression / decompression section 112 compressed data holding section 120 processing instruction section 120A starting means 122 rewritable FPGA 122A rewritable PLD 124 configuration data storage section 128 data writing section 130 registration section 132 determination section

Claims (11)

[Claims] 1. A rewritable PLD (122, 122) capable of performing a data conversion operation according to the type of configuration data by writing the configuration data.
A), a configuration data storage means (124) storing a plurality of types of configuration data for data conversion, and a starting means (a means for starting a rewritable PLD (122, 122A) to perform a predetermined data conversion operation ( 120, 120A) and information indicating the type of configuration data designated by a predetermined designating means before starting data conversion, the configuration data of the type designated by the information is stored in the configuration data storing means. Readable and rewritable PLD (122,
In the data converter having the data writing means (128) for writing to the 122A), the registration means (130) for registering the information indicating the type of the configuration data written to the rewritable PLD (122, 122A) last time, and the present designation Judgment means (13) for judging whether the type of the configuration data designated by the means (108, 108A) matches the type registered in the registration means (130).
2) and the data writing means (128) is provided with a judging means (13).
The data is written only when it is determined that they do not match in 2), and the activation means (120, 120A) is the determination means (132).
When it is determined that they do not match, the data writing means (12
After the writing of the configuration data to the rewritable PLD (122, 122A) by 8) is completed, the rewritable PLD (122, 122A) is activated to perform data conversion, and it is determined by the determination means (132) that they match. At this time, the rewritable PLD (122, 122A) is activated as it is to perform data conversion. 2. The configuration data storage means (124) prepares configuration data for each data conversion method and for each version within the same method, and the specific type of configuration data is specified. 2. The data conversion device according to claim 1, wherein the data conversion method is used, and a specific version of the data is pointed out. 3. The rewritable PLD (122) includes, in a part of the rewritable PLD (122), data capable of forming a holding section for holding the information indicating the type of the configuration data in a readable manner, and in the holding section, the registration means. The data conversion device according to claim 1, wherein the data conversion device replaces (130). 4. A rewritable PLD capable of performing a data reverse conversion operation in a predetermined method according to the type of configuration data by writing the configuration data.
(122), a configuration data storage means (124) storing a plurality of types of configuration data for data reverse conversion, and a rewritable PLD (122) for starting a data reverse conversion operation of a predetermined method. Based on the information indicating the type of the configuration data designated by the means (120) and the designating means (108) before starting the data reverse conversion, the configuration data of the type designated by the information is stored in the configuration data. Rewritable PLD read from the means (124)
In a data inverse conversion device having a data writing means (128) for writing in (122), a registration means (1 for registering information indicating the type of configuration data written in the rewritable PLD (122).
30) and a judging means (132) for judging whether or not the type of the configuration data designated by the designating means (108) and the type registered in the registering means (130) are matched, the data writing means ( 128) is the determination means (13
The data is written only when it is determined that they do not match in 2), and the activation means (120) is a rewritable PLD by the data writing means (128) when the determination means (132) determines that they do not match. After the writing of the configuration data to the (122) is completed, the rewritable PLD (122) is activated to perform the data reverse conversion, and when the determination means (132) determines that they match, the rewritable PLD (1
22) The data reverse conversion device is characterized in that it activates 22) to perform reverse data conversion. 5. The configuration data storage means (124) prepares configuration data for each data reverse conversion method and for each version within the same method. The data inverse conversion device according to claim 4, wherein a specific data inverse conversion method and a specific version of the data are pointed out. 6. The conversion data should include in advance information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion, and Before starting the data reverse conversion, information indicating the type of configuration data used in the conversion or information indicating the type of configuration data to be used in the reverse conversion is extracted from the converted data and output to the designating means (108). A type information extracting means (108) for performing the setting is provided, and the designating means (108) is configured to specify the type of the configuration data based on an input from the type information extracting means (108). 4. The inverse conversion device according to 4. 7. The rewritable PLD (122) includes data capable of forming a holding portion for holding information indicating the type of configuration data in a readable manner in a part of the rewritable PLD (122), and the holding portion stores the registration means ( The data inversion device according to claim 4, wherein the data inversion device is replaced with 130). 8. A rewritable PLD (122) capable of performing a predetermined operation in any one of a data conversion operation and a data inverse conversion operation according to the type of the configuration data by writing the configuration data, and a data conversion. One or more types of configuration data for
A configuration data storage means (124) storing one or a plurality of types of configuration data for data inverse conversion and a rewritable PLD (122) are activated to start a predetermined data conversion operation or data inverse conversion operation. Based on the means (132) and the information indicating the type of the configuration data designated by the predetermined designation means (108) before starting the data conversion or the data reverse conversion, the configuration data of the type designated by the information Configuration data storage means (12
4) Data conversion / reading having a data writing means (128) for reading from the PLD (122)
In the reverse device, a registration unit (1 that registers information indicating the type of configuration data written in the rewritable PLD (122).
30) and a judging means (132) for judging whether or not the type of the configuration data designated by the designating means (108) and the type registered in the registering means (130) are matched, the data writing means ( 128) is the determination means (13
The data is written only when it is determined that they do not match in 2), and the activating means (120) is rewritable by the data writing means when the determination means (132) determines that they do not match.
After the writing of the configuration data to the LD (122) is completed, the rewritable PLD (122) is activated to perform data conversion or data reverse conversion, and the determination means (13
If it is determined in 2) that they match, rewriting is possible as is.
A data conversion / inverse conversion device, characterized in that the LD (122) is activated to perform data conversion or inverse conversion. 9. The configuration data storage means (124) prepares configuration data for each data conversion method and for each version within the same method, and for each data reverse conversion method, and ,
Prepared for each version within the same method, and the specific type of configuration data is a specific data conversion method or a data reverse conversion method, and refers to a specific version of the data. Item 8. The data conversion / inversion device according to item 8. 10. A rewritable PLD when a plurality of types of configuration data for reverse data conversion are prepared in a configuration data storage means (124).
In the conversion data converted in (122), information indicating the type of configuration data used in conversion or information indicating the type of configuration data to be used in reverse conversion should be included, and the data reverse conversion may be performed. Before starting, type information for extracting from the conversion data information indicating the type of configuration data used in the conversion or information indicating the type of configuration data to be used in the reverse conversion and outputting it to the designating means (108) The extraction means (108) is provided, and the designating means (108) is configured to designate the type of the configuration data based on an input from the type information extracting means (108). Data conversion / inverse conversion device. 11. A rewritable PLD (122) including a data capable of forming a holding unit for holding information indicating a type of configuration data in a part of the rewritable PLD (122), and the holding unit includes the registration unit ( The data conversion / inverse conversion device according to claim 8, wherein the device is replaced with 130).