JP2983353B2 - High-speed image signal processing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed image processing which encodes an image signal and converts it into an encoded signal and / or decodes the encoded signal and converts it into an original image signal at a high speed. The present invention relates to a signal processing system, and more particularly, to a high-speed image signal processing system suitable for encoding a bitmap image signal handled in a facsimile apparatus at a high speed and decoding the encoded image signal.

[0002]

2. Description of the Related Art Conventionally, a high-speed image signal processing system for encoding a video signal and converting it into a coded signal and / or decoding the coded signal and converting it into an original image signal at a high speed has been known. The following were known:

The first type is disclosed, for example, in Japanese Patent Application Laid-Open No. 58-10 / 1983.
FIG. 13 is a block diagram showing a schematic configuration of the entire system.

In FIG. 13, a reading means 10 is a means for scanning an original to generate an image signal.
A CD (Charge Coupled Device) is used. The reading and image quality improving means 20 is means for correcting a distortion in the image signal, generating a high quality binary image signal and outputting it to the image bus 1, for example, an LSIHD63084 manufactured by Hitachi. The encoding / decoding means 30 receives a binary image signal from the image bus 1, and receives a MH (M
modified Huffman), MR (Modif
ied READ) or MMR (Modify
ed MR) and outputs a coded signal to the system bus 2 or receives a coded signal from the system bus 2 and decodes it to convert it into a binary image signal. Means, for example, Hitachi LS
IHD63183 is used. The page memory 40
A storage unit capable of storing at least one page or more of binary image signals, for example, a semiconductor memory is used. For example, the recording image quality improving unit 50 may be configured to output 8 pixels / m from the image bus 1.
This is a means for receiving an image signal of m, converting it to a high-quality image signal of 16 pixels / mm, and outputting it to the recording means 60. The recording unit 60 is a unit that prints the high-quality image signal on a recording sheet. For example, a laser printer is used. The coded document storage means 70 is a means for storing a plurality of pages of a document composed of coded signals in page units. For example, a semiconductor memory is used. The document management information storage unit 80 is a unit that stores management information such as an encoding method and a storage area of a document stored in the encoded document storage unit 70.
A semiconductor memory is used. The communication means 90 transmits and receives the coded signal to and from a communication line. If the communication line is a telephone line, a modem is used. Control means 10
Numeral 0 denotes a means for inputting / outputting a control signal via the system bus 2 and executing a control operation of the entire system. For example, a microprocessor is used.

The operation of the above system is as follows.

At the time of signal transmission, the reading means 10
The image signal obtained by
After being converted into a value image signal, it is temporarily stored in the page memory 40 via the image bus 1. Next, the page memory 40
Are encoded by the encoding / decoding means 30, and the encoded signal obtained here is stored in the encoded document storage means 70 via the system bus 2. Next, the encoded signal stored in the encoded document storage unit 70 is transmitted through the communication unit 90 as appropriate.

When receiving a signal, the communication means 9
0, the coded signal received at coded document storage means 70
Is temporarily stored. Next, the encoded document storage means 70
Is decoded by the encoding / decoding means 30 to be converted into a binary image signal, and is stored in the page memory 40 via the image bus 1. Next, the binary image signal stored in the page memory 40 is converted into an image signal by the recording / high image quality improving unit 50, and is recorded by the recording unit 60.

Further, the second one is, for example, "Introduction of ASIC in ultra-high-speed facsimile", Electronics Technology 1988.
FIG. 14 is a block diagram showing a schematic configuration of the entire system.

The configuration shown in FIG. 14 is different from the configuration shown in FIG. 13 in that the encoding / decoding means 30 in FIG. 13 is separated according to function, and becomes an encoding means 31 and a decoding means 32. 13 and the point that the page memory 40 in FIG. 13 is removed, and the same components as those in FIG. 13 are denoted by the same reference numerals.

The operation of this system is described in that the binary image signal from the reading and image quality improving means 20 is directly supplied to the encoding means 31 and encoded there, and that the binary image signal is decoded by the decoding means 32. The operation is the same as that of the system shown in FIG. 13 except that the binary image signal is directly supplied to the recording and image quality improving means 50, and therefore the description is omitted.

In addition, the third type is, for example, a type disclosed in Japanese Patent Application Laid-Open No. 57-57084.
This content is obtained by decoding a received coded signal in a facsimile apparatus employing a recording unit (for example, a recording apparatus such as a laser printer) for performing recording at a constant speed. Is provided, and this memory requires a storage capacity of one or more pages.

[0012]

First, the first type transmits the same binary image signal twice to the image bus 1 during processing of one page during transmission and reception. Or the same coded signal must be transferred twice on the system bus 2. In the case of simultaneous processing of transmission and reception, the same signal needs to be transferred four times on each bus 1, 2. There is something. Accordingly, there is a problem that a bus capable of high-speed operation is required in order to increase the speed and function of this system. Further, the first type requires a large-capacity page memory 40 capable of storing pixels of one or more pages of a document.
Is configured with a semiconductor memory so that it can operate at a high speed, and there is also a problem that the cost of the entire system increases.

Next, in the second type, it is necessary to transfer the same encoded signal twice on the system bus 2 during the processing of one page during transmission and reception. Similar to the first type, there is a problem that a system bus capable of high-speed operation is required. The second type performs encoding and decoding directly without passing through the page memory 40. Therefore, the encoded signal is transmitted from the encoding unit 31 to the encoded document storage unit 70 following the reading speed in order to perform encoding and decoding directly. It is necessary to transfer the encoded signal from the encoded document storage means 70 to the decoding means 32 in accordance with the recording speed, so that the load on the system bus 2 due to the transfer of the encoded signal increases, In addition, it is difficult to increase the recording speed.

Next, the third type has a problem that a large capacity bit map page memory is required.

An object of the present invention is to eliminate the above-mentioned problem, and an object of the present invention is to encode an image signal obtained by reading a document at high speed without using a page memory and convert the image signal into an encoded signal. And / or to provide a high-speed image signal processing system for recording an image signal obtained by decoding an encoded signal.

[0016]

According to the present invention, an image signal obtained by scanning a document is supplied to an encoding means via an image bus, and the encoded signal obtained therefrom is supplied. In the image signal processing system for supplying the image signal to the system bus, a code bus is provided on the output side of the encoding means, and the encoded document storage means for temporarily storing the encoded signal output from the encoding means is connected to the code bus. And, between the code bus and the system bus, code transfer means for inputting and outputting the coded signal to and from the coded document storage means and for transferring the coded signal of the code bus to the system bus, A control means for controlling the entire system is connected to the system bus, and a document management information storage means for storing document management information for managing documents stored in the encoded document storage means. Comprising first means that.

Further, in order to achieve the above object, the present invention provides an image signal which supplies an encoded signal from a system bus to a decoding means and supplies the obtained image signal to a recording means via the image bus. In the processing system, a code bus is provided on the input side of the decoding means, and coded document storage means for temporarily storing a coded signal is coupled to the code bus, and between the system bus and the code bus, Control means for inputting / outputting the coded signal to / from the coded document storage means and for transferring the coded signal of the system bus to the code bus, and controlling the entire system to the system bus; A second means is provided which is combined with a document management information storage means for storing document management information for managing a document stored in the encoded document storage means.

Further, in order to achieve the above object, the present invention supplies an image signal obtained by scanning a document to an encoding means via an image bus, and transmits the encoded signal obtained therefrom to a system bus. In the image signal processing system for supplying the encoded signal from the system bus to the decoding means and supplying the obtained image signal to the recording means via the image bus, the output side of the encoding means and the A common code bus is provided on the input side of the decoding means,
An encoded document storage means for temporarily storing an encoded signal is coupled to the code bus, and the encoded signal is input to and output from the encoded document storage means between the code bus and the system bus. Control means for transferring a coded signal of a bus to a system bus or transferring a coded signal of the system bus to the code bus, and controlling the whole system to the system bus; A third means is provided which is combined with a document management information storage means for storing document management information for managing a document stored in the encoded document storage means.

[0019]

According to the first means, the encoding means performs real-time encoding of the image signal read in accordance with the scanning / reading speed of the original at a high speed, and encodes the encoded signal obtained thereby. Output to the bus. The code transfer means transfers the coded signal output from the coding means to the coded document storage means at high speed in real time and temporarily stores the coded signal therein. Further, the code transfer means reads out the coded signal temporarily stored in the coded document storage means, and transfers this from the code bus to the system bus. Then, the encoded signal supplied to the system bus is transmitted to a communication line via a communication unit coupled to the system bus, or is filed to a filing unit also coupled to the system bus. . These operations are controlled and executed by control means connected to the system bus.

According to the second means, the encoded signal received by the communication means or the encoded signal from the filing means is output to the system bus. The code transfer means is
The encoded signal output to the system bus is transferred from the system bus to the encoded document storage means via the encoded bus.
Further, the code transfer means reads the coded signal stored in the coded document storage means onto the code bus and transfers the coded signal to the decoding means, following the speed requested by the decoding means. The decoding unit decodes the coded signal into an image signal by following the speed requested by the recording unit and the display unit, and outputs the image signal to the recording unit. Is output. These operations are controlled and executed by control means connected to the system bus.

According to the third means, the actions of the first means and the second means are executed in parallel, and the actions are all controlled and executed by the control means coupled to the system bus. .

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a high-speed image signal processing system according to the present invention will be described with reference to the drawings.

In the following embodiments, the high-speed image signal processing system is a facsimile apparatus, the image signal to be handled is a bitmap binary image signal used in the facsimile apparatus, and the coding method is applied to the facsimile apparatus. T4. Of CCITT (International Telegraph and Telephone Advisory Committee) recommendation. And T. The description will be made assuming that the code is an MH code, MR code, or MMR code of the international standard code defined in No.

The constant speed recording means is a laser printer commonly used in facsimile machines. This laser printer has a constant recording time per line and performs recording in page units. The processing will be described on the assumption that processing is performed in units of lines, and that transfer and communication are performed in units of pages.

By the way, all of the above-mentioned points are specified for the sake of convenience of description of the embodiments, and the present invention is not limited to the above-mentioned points at all. For example, a high-speed image signal processing system As a matter of course, any device other than a facsimile device falls within the technical scope of the present invention as long as the device corresponds to any one of claims 1 to 16.

Prior to describing the following embodiment, an outline of the overall configuration of a facsimile apparatus to which the present invention is directed will be described. The configuration can be shown, for example, as shown in FIG.

Referring to FIG. 15, the facsimile apparatus roughly includes an image scanner section 500, a laser printer section 600, and a controller section 700.
The image scanner unit 500 includes a document table 501,
Automatic document feeder 502, fluorescent lamp 503, lens system 50
4, a charge-coupled device (CCD) 505, an image processor 506, etc.
00 is a photosensitive drum 601, a developing machine 602, a transfer unit 6
03, a paper transport body 604, a laser scanner 605, a paper feed cassette 606, a paper feed deck 607, and the like. The controller 700 further includes an image memory 701, a high-speed encoder 702, a high-speed decoder 703, and image processors 704 and 705. , A hard disk 706, a communication device 707, and the like.

The outline of the operation of this facsimile machine is as follows.

In the image scanner section 500, a document on a document table 501 is automatically conveyed to a scanning position by an automatic document feeder 502, where scanning is performed. The optical signal obtained by this scanning is transmitted through the lens system 504 to the CC.
D505 is supplied and converted into a corresponding electric signal. The electric signal is converted into an image signal in the image processor 506 and output from the image scanner unit 500. Next, in the laser printer unit 600, the photosensitive drum 601, the developing machine 602, the transfer unit 603, the paper transporting body 604, the laser scanner 605, the paper feeding cassette 606,
The paper feed deck 607 constitutes a well-known electrophotographic recording apparatus, and an image signal to be recorded is transmitted to the controller 70.
Since the image signal is supplied from 0 to the laser scanner 605, the image signal is recorded in the recording device. Further, in the controller unit 700, the image scanner unit 500
Is processed by an image processor 704 and then encoded by a high-speed encoder 702, and the encoded signal obtained thereby is stored in an image memory 701 or a hard disk 706, or is transmitted to a communication device 707 as appropriate. Transmitted to another facsimile machine via On the other hand, the coded signal received from another facsimile device in the communication device 707 is stored in the image memory 701 or the hard disk 7.
06, or after being decoded by the high-speed decoder 703 and converted into an image signal, the image signal is processed by the image processor 705, and this image signal is processed by the laser printer unit 6.
00 and recorded and output as a received image.

Here, each embodiment will be described sequentially.

FIG. 1 is a block diagram showing a first embodiment of a facsimile apparatus according to the present invention.

In FIG. 1, 1a is a first image bus, 1
b is a second image bus, 3 is a code bus, 70 is an encoded document storage means, 110 is a code transfer means, 120 filing means, 130 is a panel, 140 is a display control means, 150
Is a display memory, and 160 is a display means, and the same components as those shown in FIGS. 13 and 14 are denoted by the same reference numerals. Further, the code bus 3 in the present invention is a bus to which a signal obtained by encoding (encoded signal or encoded document) is exclusively transferred.
The image buses 1a and 1b to which image signals are exclusively transferred and the system bus 2 to which control signals from the control means 100 are also transferred.
Is different from

The reading means 10 is a means for scanning an original to generate an image signal, and uses, for example, a CCD as a photoelectric conversion element and a pulse motor as a means for scanning and moving the original. The reading and image quality improving means 20 is means for correcting a distortion in the image signal, converting the image signal into a high-quality binary image signal, and outputting the same to the first image bus 1a. Is used. The encoding means 31 receives the high-quality binary image signal from the first image bus 1a, encodes it by the MH, MR, or MMR method, and outputs the encoded signal obtained thereby to the code bus 3. For example, an LSIHD63183 manufactured by Hitachi is used. Here, the image bus 1a is a data bus for transferring the high-quality binary image signal from the reading / high-quality image forming means 20 to the encoding means 31. The coded document storage means 70 is a means for storing a coded signal (document) in page units, and for example, a semiconductor memory is used. The transfer of the encoded signal from the encoding unit 31 to the encoded document storage unit 70 is performed via the code bus 3. The decoding means 32 includes the encoded document storage means 70
Receiving the coded signal via the code bus 3, decoding the converted signal into an original binary image signal, and converting the binary image signal via the second image bus 1b into a recording and high image quality improving means. 50
Means, for example, LSIHD6 manufactured by Hitachi
3183 is used. For example, the recording / high image quality improving means 50 receives an image signal of 8 pixels / mm from the second image bus 1b, converts this into a high quality image signal of 16 pixels / mm, and converts the high quality image signal. This is a means for supplying to the recording means 60. The recording means 60 is a means for printing an input image signal on recording paper, and for example, a laser printer is used as described above. The document management information storage unit 80 is a unit for storing management information such as a coding method and a storage area of a document stored in the coded document storage unit 70. For example, a semiconductor memory is used. The communication means 90 is means for transmitting and receiving the coded signal between the system bus 2 and the communication line. When the communication line is a telephone line, a modem is used. The filing means 120 is means for storing and storing a large amount of coded signals. For example, an optical disk or a hard disk is used. The document management information storage means 8
0, the communication means 90 and the filing means 120 are all connected to the system bus 2. Code transfer means 11
0 is a means for transferring an encoded signal between the encoding means 31 and the decoding means 32, the communication means 90, the filing means 120, and the encoded document storage means 70. , For example, DMA (Direc
t Memory Access) is used. The display control unit 140 is a unit that receives the binary image signal decoded by the decoding unit 32, converts the binary image signal into a resolution suitable for display, and generates a display image signal. At this time, the resolution is converted from, for example, 8 pixels / mm to 2 pixels / mm. The display memory 150 is a means for storing the display image signal displayed on the display means 160, and is usually a semiconductor memory. The display means 160 is a means for displaying the display image signal, for example, a CRT (cathode ray tube) or a liquid crystal panel. The control means 100
Means for inputting / outputting a control signal via the system bus 2 and executing various controls of the entire facsimile apparatus,
For example, a microprocessor is used. Further, the panel 130 is an interface means for a user to request a desired process from the facsimile machine.
Used for inputting a facsimile number.

The operation of the facsimile apparatus having the above configuration is as described below. The operation can be roughly classified into a basic operation and an applied operation.

1. basic action . Memory Read This operation is an operation unit until the image signal read by the reading unit 10 is temporarily stored in the encoded document storage unit 70. First, the control means 100 controls the system bus 2
A read command to the reading means 10, a high picture quality command to the reading high picture quality improving means 20, a coding command to the coding means 31, and a coded signal from the coding means 31 to the code transfer means 110 are stored in a coded document. The transfer command to be transferred to the means 70 and the transfer destination address of the encoded document storage means 70 are output. In response to these commands, the reading unit 10 scans the original to generate an image signal, and outputs this image signal to the image quality improving unit 20. Next, the reading image quality improving means 20 performs an image quality improving process on the input image signal in real time, and outputs a binary image signal to the first image bus 1a. Subsequently, the encoding means 31 outputs the first
The binary image signal from the image bus 1a is read by one of the three built-in line memories, and encoded using the remaining two line memories (corresponding to the reference line and the coding line in the MMR coding process). And outputs the coded signal obtained by the coding process to the code bus 3. In this case, if the encoding processing time per line is selected to be equal to or less than the reading time per line, the above processing can be performed with three line memories without overflowing information. Next, the code transfer means 110 causes the encoded signal output to the code bus 3 to be transferred in real time into the encoded document storage means 70. The encoded signal is encoded from the address designated by the control means 100. It is stored in the document storage means 70.

When the reading means 10 finishes reading the last line of the first page of the document, page end information is read from the reading means 10 and the image quality improving means 20 is read.
Then, this page end information is notified from the reading and high image quality improving means 20 to the encoding means 31. Upon completion of the encoding process for the last line of the page, the encoding unit 31 notifies the control unit 100 of page end information. When the page end information is notified from the encoding unit 31, the control unit 100 obtains the address storing the last encoded signal from the code transfer unit 110, and obtains the first page stored in the encoded document storage unit 70. Is stored in the document management information storage means 80 as document management information, and the entire processing of the first page is completed.

The subsequent second and subsequent pages are processed in the same manner as the first page. When the processing of all the pages is completed, the number of pages of the coded document including a plurality of pages, the document address such as the address where each page is stored, and the like are read. The management information is stored in the document management information storage unit 80, and the memory reading process ends.

[0038] Memory transmission This operation is an operation unit until the encoded signal (encoded document) stored in the encoded document storage unit 70 is transmitted. First, when detecting the end of the memory reading operation for one document, the control unit 100 supplies the destination information input from the panel 130 to the communication unit 90, and calls a destination facsimile machine (not shown). Next, when the destination facsimile machine is connected to the communication line, the control unit 100 reads out the address of the encoded document storage unit 70 in which the encoded document to be transmitted is stored from the document management information storage unit 80. The address and the encoded signal (document) storage amount of the encoded document to be transmitted are stored in the code transfer unit 110.
And outputs a transfer command from the encoded document storage means 70 to the communication means 90 to the code transfer means 110, and outputs a transmission command to the communication means 90. At this time, the communication unit 90 sends a request to transfer an encoded signal (document) to be transmitted corresponding to the transmission signal transmission speed to the code transfer unit 1.
Output to 10 The code transfer unit 110 is a communication unit 90
When the transfer request is received from the
A coded signal (document) to be transmitted is read out from the address 0 to the code bus 3 and transferred to the communication means 90 via the system bus 2. The communication means 90 converts the input encoded signal (document) to be transmitted into a medium suitable for the model of the transmission destination, transmits the converted encoded signal, and ends the memory transmission. Since the media conversion means that the receiving capability differs depending on the model, the media conversion is to convert the signal into a signal of a format suitable for the capability of the model of the transmission destination. Specifically, the conversion of the page size and the encoding method are performed. It consists of conversion, resolution conversion, and a combination of these.

[0039] Memory filing This operation is an operation means up to filing the encoded signal (document) stored in the encoded document storage means 70. First, when detecting the end of the memory reading operation for one document, the control unit 100 reads out the address where the encoded document to be filed is stored from the document management information storage unit 80, and performs the filing with this address. Code transfer means 11 for storing the encoded signal (document) storage amount
The value is set to 0, and a transfer command from the encoded document storage means 70 to the filing means 120 is output to the code transfer means 110, and a document identifier and a filing command are output to the filing means 120. At this time, when filing unit 120 receives the filing command, filing unit 120 outputs a request for transferring an encoded signal (document) to be filed to code transfer unit 110. Code transfer means 110
Receives the transfer request from the filing means 120, reads out the coded signal (document) to be filed from the address of the coded document storage means 70 onto the code bus 3, and sends this to the filing means via the system bus 2. Transfer to 120. The filing means 120 stores the input coded signal (document) in a large-capacity storage medium such as an optical disk, and ends the memory filing.

[0040] Memory reception This operation is an operation means from receiving a request for receiving an encoded signal (document) to receiving the encoded signal (document) and temporarily storing the encoded signal (document) in the encoded document storage means 70. First, when the communication means 90 receives a facsimile signal reception request from any facsimile apparatus (not shown), the communication means 90 notifies the control means 100 of this request. At that time, the control means 100
The communication unit 90 outputs a code transfer instruction to the encoded document storage unit 70 and a transfer destination address of the encoded document storage unit 70, and outputs a reception instruction to the communication unit 90.
Next, the communication means 90 performs media conversion of the encoded signal (document) received from the facsimile apparatus into a format suitable for the apparatus itself, and outputs the media-converted encoded signal (document) to the system bus 2. , And outputs a transfer request for the received encoded signal (document) to the code transfer means 110. Upon receiving the transfer request from the communication unit 90, the code transfer unit 110 transfers the received encoded signal (document) from the system bus 2 to the code bus 3, and encodes the transferred encoded signal (document). Is written to the address of the encrypted document storage means 70. When the communication unit 90 finishes receiving the encoded signal (document) for one page, the control unit 1 determines that the reception of one page has been completed.
Notify 00. When receiving the end of the reception of one page, the control means 100 outputs a transfer end instruction of the received coded signal (document) to the code transfer means 110, and outputs the transferred coded signal (document) to the code transfer means 110. The number of words of the document) is output, and further, the
The document management information such as the storage address of the received encoded signal (document) for one page stored in the encoded document storage means 70 and the storage amount of the encoded signal (document) is written. Subsequently, the same processing as that for the first page is performed for the second and subsequent pages. When the control unit 100 inputs from the communication unit 90 that the reception of one encoded document has been completed, the control unit 100 The document management information such as the number of pages of the one encoded document is written, and the memory reception ends.

[0041] Memory recording This operation is an operation unit until an encoded signal (document) temporarily stored in the encoded document storage unit 70 is recorded.
First, the control unit 100 obtains document management information of an encoded signal (document) to be recorded from the document management information storage unit 80 and stores the encoded signal (document) of the encoded signal (document) to be recorded in the code transfer unit 110. A code transfer command from the means 70 to the decoding means 32, a storage destination address thereof, and the number of words to be transferred are output, and a decoding instruction is issued to the decoding means 32, a high image quality instruction is given to the recording / high image quality improving means 50, and a recording means 60 is provided. Output recording commands. Upon receiving the decoding instruction, the decoding unit 32 outputs a request to transfer a coded signal (document) to be recorded in the code transfer unit 110. When the transfer request is input from the decoding means 32, the code transfer means 110 reads out the coded signal (document) to be recorded from the address of the coded document storage means 70, and decodes the signal via the code bus 3. To the means 32. The decoding means 32 decodes the input encoded signal (document) to be recorded, and
The value image signal is stored in an internal decoding line memory. In this case, the line memory has at least three lines, which are used as a reference line, a decoding line, and a transfer line. When decoding of the encoded signal (document) for one line to be recorded is completed, the decoded line functions as a transfer line, the reference line functions as a decode line, and the transfer line functions as a reference line. Prepare. The decoding means 32 supplies the decoded binary image signal on the transfer line to the recording / quality improving means 50 via the second image bus 1b in real time in response to a request from the recording / quality improving means 50. I do. In response to a request from the recording unit 60, the recording / high-quality recording unit 50 converts the binary image signal input from the decoding unit 32 in real time into a high-quality recording image signal, and outputs the high-quality recording image signal to the recording unit 60. End the memory recording.

[0042] File reading This operation is an operation means for reading out the encoded signal (document) filed by the filing means 120 and temporarily storing it in the encoded document storage means 70. First, the control unit 100 outputs the identifier of the encoded signal (document) to be read to the filing unit 120 and a read command thereof, and at the same time, outputs the encoded signal (document) from the filing unit 120 to the code transfer unit 110 It outputs a transfer command to the encrypted document storage means 70 and its transfer destination address. At this time, the filing means 12
0, when receiving an identifier of an encoded signal (document) to be read and a read instruction thereof, reads the encoded signal (document) to be read in page units, and transmits a transfer request of the encoded signal (document) to be read to the code transfer means. Output to 110. Upon receiving the transfer request, the code transfer unit 110 transfers the coded signal (document) to be read output from the filing unit 120 from the system bus 2 to the code bus, and then writes the coded signal (document) in the coded document storage unit 70 at the address. Perform When the encoded signal (document) to be read reaches a break between the page unit and the document unit, the filing unit 120 notifies the control unit 100 of the page end and the document end. Upon receiving this notification, the control unit 100 writes the document management information such as the storage address of each page and document and the capacity of the coded signal (document) to be read into the document management information storage unit 80, and ends the file reading.

. Memory display This operation is operation means until the encoded signal (document) stored in the encoded document storage means 70 is displayed on the display means 160. First, the control unit 100 obtains the document management information of the encoded signal (document) to be displayed from the document management information storage unit 80, and stores the encoded document (document) of the encoded signal (document) to be displayed in the code transfer unit 110. The means 70 outputs a code transfer command to the decoding means 32, its storage address and the number of words to be transferred, and outputs a decoding command to the decoding means 32 and a display command to the display means 140. Upon input of the decoding instruction, the decoding means 32 outputs a request to transfer the encoded signal (document) to be displayed to the code transfer means 110. Upon receiving the transfer request from the decoding unit 32, the code transfer unit 110 reads out a coded signal (document) to be displayed from the address of the coded document storage unit 70, and then decodes the coded signal via the code bus 3. To the means 32. Decoding means 32
Decodes the input encoded signal (document) to be displayed,
The decoded binary image signal is stored in an internal decoding line memory. Subsequently, in response to a request from the display control means 140, the decoding means 32
The value image signal is supplied to the display control means 140 via the second image bus 1b. Next, the display control means 140 converts the resolution of the binary image signal input from the decoding means 32, generates a display image signal and writes the display image signal into the display memory 150, and converts the display image signal from the display memory 150. The readout is supplied to the display means 160 to display the encoded signal to be displayed, and the memory display is completed.

2. Application operation. Facsimile (FAX) transmission This operation is an operation means realized by combining the above-mentioned memory read operation and the above-mentioned memory transmission operation. In this case, since the memory reading operation and the memory transmitting operation are independent, the original can be read at high speed regardless of the transmission speed of the communication line. The system bus 2 usually has a fixed bus throughput because a large number of control targets are connected. However, at the time of memory reading, a coded signal (document) does not flow on the system bus 2, so that high-speed processing can be realized. Further, reading at a constant high speed can be realized without a page memory. For example, when scanning and reading an A4-size document at 8 pixels / mm per second (in this case,
Since 4 megapixels are processed per second), since there is no page memory, it is necessary to perform MH coding in real time according to the reading speed, and the code amount is at most 4.
Since the speed reaches five times, the speed of the encoded signal (document) output from the encoding means 31 reaches 18 Mbit / sec. When an encoded signal (document) flows on the system bus 2 at this speed, the load on the system bus 2 is large, and the system bus 2
However, in this embodiment, the encoded signal (document) flows only through the code bus 3 at the time of reading the memory. It can be realized without using it. Also, when the second document is read into the memory, the encoded signal (document) output from the encoding means 31 at high speed does not flow on the system bus 2, so that the first document is simultaneously transmitted to the memory. This has the effect of increasing the throughput of the entire apparatus.

[0045] Read filing This operation is an operation means that can be realized by combining the above-mentioned memory read operation and the above-mentioned memory filing operation. In the read filing according to the present embodiment, as in the case of facsimile (FAX) transmission, there are effects of reading at a constant speed at high speed without using a page memory, reducing the load on the system bus 2, and improving the system throughput.

[0046] Reception of facsimile This operation is an operation means that can be realized by combining the above-described memory reception operation and the above-described memory recording operation. Also in this case, since the memory recording operation and the memory receiving operation are independent, the document can be recorded at a high speed regardless of the transmission speed of the communication line. As described above, the system bus 2 usually includes
The bus throughput is fixed because many control targets are connected, but the encoded signal does not flow on the system bus 2 during memory recording, so that the received signal can be processed at a high speed. Such high-speed recording at a constant speed can be realized without using a page memory. For example, A4 size document is 8 pixels / mm
When a document read and MH-encoded is recorded in 1 second (in this case, 4 megapixels are recorded per second), there is no page memory, so it is necessary to follow the recording speed and perform MH decoding in real time. Since the code amount reaches 4.5 times the maximum of the image, the transfer rate of the coded signal input to the decoding means 32 reaches 18 Mbit / s. When an encoded signal (document) flows on the system bus 2 at this speed, the load on the system bus 2 is large, and the system bus 2
However, in this embodiment, the coded signal (document) flows only on the code bus 3 at the time of memory recording. It can be realized without using a page memory. Further, when the first document is recorded in the memory, the encoded signal (document) does not flow on the system bus 2, so that the second document can be simultaneously received in the memory and the throughput of the entire system can be increased. is there.

[0047] Filing document recording This operation is an operation means that can be realized by combining the above-described file reading operation and the above-described memory recording operation. In the filing document recording according to the present embodiment, as in the case of facsimile (FAX) reception, there are effects such as high-speed recording at a constant speed without using a page memory, reduction of a system bus load, and improvement of a system throughput.

[0048] Read display This operation is an operation means that can be realized by combining the memory read operation and the memory display operation.

[0049] Reception display This operation is an operation means that can be realized by combining the above-mentioned memory reception operation and the above-mentioned memory display operation.

[0050] Filing display This operation is an operation means that can be realized by combining the file read operation and the memory display operation.

The above-described series of display operations are for decoding and displaying the coded signal (document) stored in the coded document storage means 70 connected to the code bus 3, so that the system bus No. 2 reduces the load. Further, since the display is realized without using the page memory for storing the document, the decoded image signal is temporarily stored in the page memory, and then read out and transferred to the display control means 140. Since two transfers of the decoded image signal can be completed only once,
It can be displayed at that high speed. Further, the display image signal stored in the display memory 150 generally has a lower resolution and a smaller screen than the decoded image signal, so that the display memory 140 requires a smaller storage capacity than the page memory. This has the effect of enabling cost reduction.

[0052] Copy This operation is operation means that can be realized by combining the above-described memory reading operation and the above-described memory recording operation.

As described above, in this embodiment, since all the basic operations are performed with the coded document storage means 70 as the start or end in the signal transfer, for example, the memory read operation and the facsimile (FAX) Two or more separate operations, such as a reception operation, can be processed simultaneously, and there is an effect that the throughput of the entire system can be improved. Further, for example, even if two or more individual operations such as a memory reading operation and a facsimile (FAX) receiving operation are simultaneously processed, an encoded signal (document) flowing on the system bus 2 is transmitted from the communication unit 90 to the encoding device. Since only the encoded signal (document) at the time of facsimile reception transferred to the encrypted document storage means 70 is received, there is an effect that two or more independent operations can be sufficiently processed with a small load on the system bus 2.

FIG. 2 is a block diagram showing a detailed structure of the encoding means 31 of FIG.

In FIG. 2, 311 is a first switch,
312 to 314 are first to third line memories, 31
5 is a second switch, and 316 is an encoding circuit.

The operation of the encoding means 31 shown in FIG. 2 is as follows.

Each of the first line memory 312, the second line memory 313, and the third line memory 314 has a storage capacity capable of storing an image signal for one line of a document. , Respectively, from the image quality improving means 20 for reading to the first image bus 1a.
Are used as a transfer line for an image signal input through the, an encoding line for encoding the image signal, and a reference line in two-dimensional encoding (MMR and MR two-dimensional encoding). The first switch 311 is a switch that selects any one of the three line memories 312 to 314 as a transfer line.
2 is selected as a transfer line, and when the transfer of the image signal for one line is completed, the second line memory 313 is selected as the transfer line in the next one line.
The three line memories 312 to 314 are sequentially selected as transfer lines in line units and connected to the first image bus 1a. The second switch 315 selects a reference line and an encoding line from among the three line memories 312 to 314 and selectively connects to the encoding circuit 316. For example, the second switch 315 Memory 313
Is selected as a reference line and the third line memory 314 is selected as an encoding line, and when encoding for one line is completed, the third line memory 314 is used as a reference line and the first line memory 312 are selected as coding lines. Further, the encoding circuit 316 calculates M
A circuit for performing H, MR and MR coding,
The image signal of the reference line and the coding line (the reference line is unnecessary in the case of MH) is input, and the coding signal is output to the code bus 3. Since the operation in the encoding circuit 316 and the operation related to the encoding circuit 316 are the same as the operation of this type of conventional circuit, further detailed description will be omitted.

Further, FIG. 3 shows a case where the encoding means 31 of FIG. 2 is used as the encoding means 31 of FIG. 1 from the reading of the original to the transfer of the encoded signal (document) to the encoded document storage means 70. 5 is a time chart showing a temporal flow of data in processing (that is, the memory reading operation).

In FIG. 3, 1, 2,..., E-1, and E indicate each line in each page of the document. For example, 1 is a top line of a certain page, and encoding is one-dimensional. The code (that is, the reference line is unnecessary) MH system is adopted.

First, between the times t1 and t2, reading of the first line of the document is started, the read image signal is subjected to real-time high quality processing, and the processed image signal is stored in the encoding means 31. Transfer to the transfer line memory. Subsequently, between time t2 and t3, the second
The reading of the line and the transfer to the transfer line memory are performed, and at the same time, the coding of the first line is performed, and the coded signal (document) is transferred to the coded document storage means 70 in real time following this coding. Perform Hereinafter, at time t3-
The same operation is performed from the time t4 to the time te-tee, and the reading of the original and the transfer to the transfer line memory are completed for one page at the time te, and the encoding and the transfer to the encoded document storage means 70 are completed. At time tee, one page ends. In this case, if the encoding processing time per line including the transfer time of the encoded signal (document) is equal to or less than the reading time per line, the reading speed follows the reading speed as shown in the time chart of FIG. Thus, all lines can be encoded. That is, without providing a page memory between the reading high image quality improving means 20 and the encoding means 31,
Three line memories 312 to 31 in the encoding means 31
4, a high-speed reading at a constant speed can be realized.

FIG. 4 is a block diagram showing a detailed structure of the decoding means 32 of FIG.

In FIG. 4, reference numeral 321 denotes a first switch,
322 to 324 are first to third line memories;
5 is a second switch, and 326 is a decoding circuit.

The operation of the decoding means 32 shown in FIG. 4 is as follows.

Each of the first line memory 322, the second line memory 323, and the third line memory 324 has a storage capacity capable of storing an image signal for one line of a document, and these line memories 322 to 324 Is a transfer line for transferring an image signal to the recording and image quality improving means 50 via the second image bus 1b, a decoding line for storing the decoded image signal, and two-dimensional decoding (MMR and MR).
This is used as a reference line at the time of decoding of the two-dimensional code of the system). The first switch 321 selects one of the three line memories 322 to 324 as a transfer line, and the second switch 325
The reference line and the decoding line are selected from the line memories 322 to 324 and connected to the decoding circuit 326. The decoding circuit 326 is a circuit that performs decoding of the MH, MR, and MR systems, receives an encoded signal from the code bus 3, and writes a decoded image signal to a decoding line. Since the operation in the decoding circuit 326 and the operation related to the decoding circuit 326 are the same as the operation of this type of conventional circuit, further detailed description will be omitted.

Further, FIG. 5 shows that when the decoding means 32 of FIG. 4 is used as the decoding means 32 of FIG. 1, the coded signal (document) from the coded document storage means 70 to the decoding means 32
4 is a time chart showing a temporal flow of a process from transfer of the data to its recording (that is, a memory recording process).

In FIG. 5, 1, 2,..., E-1, and E indicate lines in each page of the document, for example, 1 is the top line of a page, and decoding is one-dimensional. The code (that is, the reference line is unnecessary) MH system is adopted.

First, between time t1 and t2, the encoded document storage means 70 for the encoded signal (document) on the first line
, Transfer to the decoding means 32 is started, and at the same time, the decoding means 32 decodes the input coded signal (document) in real time and writes the decoded image signal in the decoding line memory. Following, time t2-t3
In the meantime, the transfer to the decoding means 32 on the second line and the real-time decoding by the decoding means 32 are performed at the same time. After the transfer to the recording means 60 and the transfer of the transferred image signal to the recording / image quality improving means 50 to improve the image quality in real time, the recording transferred to the recording means 60 is performed. Hereinafter, from the time t3 to the time t4, the time te−
The same operation is performed until te, and the transfer of the encoded signal to the decoding means 32 and the decoding by the decoding means 32 are completed for one page at time te.
The transfer of the image signal to 0 and the recording by the recording means 60 are completed for one page at time tee. In this case, if the decoding processing time including the transfer time of the encoded signal (document) per line is equal to or less than the recording time per line, the recording speed follows the recording speed as shown in the time chart of FIG. Thus, decoding processing of all lines can be performed. That is,
Without providing a page memory between the recording / image quality improving means 50 and the decoding means 32, it is possible to realize high-speed constant-speed recording using the three line memories 322 to 324 in the decoding means 32. .

The time charts of the encoding process and the decoding process of the present embodiment shown in FIGS. 3 and 5 are common to the following embodiments.

FIG. 6 is a block diagram showing a second embodiment of the facsimile apparatus according to the present invention.

In this embodiment, there is one image bus 1 and
The output of the reading high quality means 20 and the recording high quality means 5
Although the input of 0, the input of the encoding means 31 and the output of the decoding means 32 are all different from the configuration of the first embodiment only in that they are connected to the image bus 1,
Other configurations are the same as those of the first embodiment.

The operation of this embodiment is based on the image bus 1
From the reading high image quality improving means 20 to the encoding means 3
1 and the image signal is transferred from the decoding means 32 to the recording and high quality improving means 50, and the other operations are the same as those of the first embodiment. The above description is omitted.

In the present embodiment, the operation for performing the encoding process and the decoding process, for example, when the memory reading operation and the memory recording operation are performed simultaneously, the image bus 1 is one, so that two Image bus 1
Will occur on the above. For this reason, although there is a disadvantage that a high-speed image bus is required as compared with the first embodiment, the reading and image quality improving means 20 and the recording and image quality improving means 50 are required.
In the case of a large-scale integrated circuit configuration (made into an LSI) as the image quality improving means 21 shown by the dotted line in the figure, and / or the encoding / decoding of the encoding means 31 and the decoding means 32 by the dotted line in the figure. When an LSI is used as the means 30, there is an effect that the number of pins can be reduced.

FIG. 7 is a block diagram showing a third embodiment of the facsimile apparatus according to the present invention.

In this embodiment, the first code bus 3a and the second code bus 3b are provided, and the first coded document storage means 71, the second coded document storage means 72 and the first code transfer are provided. A means 111 and a second code transfer means 112 are provided. The output of the coding means 31 is connected to the first code bus 3a, and the input of the decoding means 32 is connected to the second code bus 3b. Also, the first encoded document storage means 71 and the first code transfer means 111 are connected to the first code bus 3a,
The configuration differs from that of the first embodiment only in that the second encoded document storage means 72 and the second code transfer means 112 are connected to the second code bus 3b. The configuration is the same as that of the first embodiment.

The operation of the present embodiment is similar to that of the first code transfer means 111, wherein the first code transfer means 111 transmits the coded signal (document) from the coding means 31 to the first coded document storage means 71 via the first code bus 3a. ) And the first encoded document storage means 71 via the first code bus 3a and the system bus 2.
To transfer the encoded signal (document) to the communication means 90 and the filing means 120. In addition, the second code transfer means 112 is connected to the system bus 2 and the second code bus 3
b, a coded signal (document) is transferred from the communication means 90 or the filing means 120 to the second coded document storage means 72, and the second coded document storage means is transferred via the second code bus 3b. Although the operation of the first embodiment differs from that of the first embodiment in that an encoded signal (document) is transferred from 72 to the decoding means 32, the other operations are not different from those of the first embodiment. Further description is omitted.

In this embodiment, since the code bus is divided into two, a first code bus 3a for coding and a second code bus 3b for decoding, the coding process and the decoding process are performed. For example, when the memory read operation and the memory recording operation are performed at the same time, the code bus 3 is compared with that of the first embodiment in which the code bus 3 is not divided into two. There is an effect that the load on 3a and 3b is reduced, and high-speed processing becomes possible.

FIG. 8 is a block diagram showing a fourth embodiment of the facsimile apparatus according to the present invention.

In this embodiment, a dual port RAM is used as the encoded document storage means 70. One port is connected to the code bus 3 and the other port is connected to the system bus 2, respectively. Although it differs from that of the first embodiment only in the configuration that can be accessed from both the buses 2, the other configuration is the same as that of the first embodiment.

The operation of this embodiment is similar to the operation of the code transfer means 1.
10 transfers the encoded signal (document) between the communication unit 90 or the filing unit 120 and the encoded document storage unit 70 directly from the system bus 2 without passing through the code transfer unit 110. For this reason, in the memory transmission operation, the memory filing operation, the memory reception operation, and the file read operation, an encoded signal (document) does not flow through the code bus 3, so that any one of the above operations and the code bus 3 , For example, when the memory read operation is performed at the same time, the load on the code bus 3 is considerably reduced, and there is an effect that high-speed processing can be performed accordingly.

FIG. 9 is a block diagram showing a fifth embodiment of the facsimile apparatus according to the present invention.

In this embodiment, a dual port RAM is used as the document management information storage means 80. One port is connected to the code bus 3 and the other port is connected to the system bus 2, respectively. It differs from that of the first embodiment only in the configuration that can be accessed from both the buses 2, but the other configuration is the same as that of the first embodiment.

The operation of this embodiment is similar to the operation of the code transfer means 1.
10 inputs the transfer destination address of the coded signal (document) of the coded document storage means 70 from the document management information storage means 80 via the code bus 3 and executes the transfer of the coded signal (document). For example, when transferring an encoded signal (document) from the encoding means 31 to the encoded document storage means 70, the code transfer means 110
The transfer destination address of the encoded signal (document) set in the document management information storage means 80 via the code bus 3 is obtained via the code bus 3, and the encoded signal (document) is transferred to the address. In this case, when transferring a code amount of 64 Kbytes as an encoded signal (document) for one page to a plurality of memory blocks having a storage capacity of 8 Kbytes per memory block, it is necessary to transfer the code amount to eight memory blocks. However, the start address of each memory block is
Is set in advance in the document management information storage unit 80 before the reading starts, the code transfer unit 110 sequentially stores the transfer destination addresses of the transfer destination memory blocks from the document management information storage unit 80 via the code bus 3. Obtain and execute encoded signal (document) transfer. For this reason, the control means 100
Since there is no need to set the transfer destination address to the code transfer unit 110 during the memory read operation, the load on the control unit 100 during the memory read operation is reduced, and the memory read operation can be realized at high speed. The same effect is obtained in the memory recording operation.

FIG. 10 is a block diagram showing a sixth embodiment of the facsimile apparatus according to the present invention.

In this embodiment, a scanner 11 and a scanner interface (I / I /
F) 22 is the recording / image quality improving means 5 in the first embodiment.
0, printer I / F5 instead of recording means 60
1. The printer 61 is provided with the document management information storage unit 80, the communication unit 90, and the filing unit 12 in the first embodiment.
0, a personal computer I / F 170 and a personal computer 300 are used in place of the panel 130.
This is the same as that of the embodiment.

The scanner 11 scans the original and outputs an image signal, and the scanner I / F 22 inputs and outputs an image signal and a control signal. The printer 61 records image signals, and the printer I / F 51 inputs and outputs image signals and control signals. Further, the personal computer 300 executes communication and filing with the outside, and executes the personal computer I / F 17.
0 is the method by DPRAM, the method by LAN, RS2
32C or the like. In the case of the method using the DPRAM, the communication path 4 is a bus inside the personal computer.

This embodiment is basically similar to the second embodiment described below.
Perform two operations.

[0087] Scanner Input First, when a scanner input command is supplied from the personal computer 300 via the personal computer I / F 170, the control unit 100
Receives this command and outputs a processing command to the scanner 11 via the scanner I / F 22. Next, when this processing command is input, the scanner 11 scans the document and outputs an image signal. The image signal obtained by the scanner 11 is input to an encoding unit 31 via a scanner I / F 22, and the encoding unit 31 encodes the image signal, and encodes the encoded signal (document) via a code bus 3. The document is stored in the encrypted document storage means 70. This stored encoded signal (document) is
It is read out under the control of the code transfer means 110 and output to the personal computer I / F 170, and the personal computer I / F 170 transfers this encoded signal (document) to the personal computer 300.

[0088] Printer Recording First, when a printer recording command is supplied from the personal computer 300 via the personal computer I / F 170, the control unit 100
Issues a transfer command to the code transfer means 110 in response to this command, and in response to this command, the code transfer means 110 transmits a coded signal (document) input from the personal computer 300 via the personal computer I / F 170 to the code bus 3. And stores it in the encoded document storage means 70. When the accumulation of the encoded signal for one page or one document in the encoded document storage means 70 is completed, the control means 100 outputs a recording command to the printer 61 via the printer I / F 51. Further, the decoding means 32 inputs an encoded signal (document) to be recorded from the encoded document storage means 70 and decodes it, and an image signal obtained thereby is output to the printer 61 via the printer I / F 51. It is output from the decoding means 32 following the speed.

According to the present embodiment, the coded document storage means 70 capable of storing coded signals of one or more pages is connected to the personal computer 30.
Since it is connected to the code bus 3 separate from the bus of 0, the reading operation and the recording operation at a constant high speed can be executed without applying a load to the personal computer 300 without using a page memory. is there.

FIG. 11 is a block diagram showing a seventh embodiment of the facsimile apparatus according to the present invention.

In this embodiment, the communication means 9 is connected to the system bus 2.
Although it differs from that of the sixth embodiment only in that 0 is connected, the other configuration is the same as that of the sixth embodiment.

The operation of this embodiment is the same as that of the sixth embodiment with respect to the scanner input operation and the printer recording operation. In addition, the present embodiment can perform the following transmission and reception operations.

[0093] Scanner Transmission This operation is an operation unit that encodes an image signal obtained by the scanner 11 and then transmits the encoded image signal using the communication unit 90. This operation is performed by transmitting the scanner transmission command to the personal computer 30.
Except that the above operation is started by inputting from 0, the first
The facsimile (F
AX) Since it is almost the same as the transmission, further detailed description is omitted.

[0094] PC transmission This operation is an operation means for transmitting an encoded signal (document) supplied from a filing means (not shown) in the personal computer 300 via the personal computer I / F 170 by the communication means 90. This operation includes the following two operations.

One of them is to directly transfer the encoded signal (document) supplied via the personal computer I / F 170 to the communication means 90 and transmit it. This is effective when the transmission speed of the communication line is lower than the transfer speed of the personal computer I / F 170.

The other is that the coded signal (document) supplied via the personal computer I / F 170 is transferred to the coded document storage means 70 and temporarily stored in the coded document storage means 70. The aforementioned memory transmission is performed. The adoption of this type requires that the transmission speed of the communication line be a PC I / F17.
This is effective when the transfer speed is higher than 0.

[0097] Personal Computer Reception This operation is an operation means for transferring and storing the encoded signal (document) received by the communication means 90 to the filing means in the personal computer 300. This operation also has the following two operations.

One of the methods is to transfer the encoded signal (document) received by the communication means 90 directly to the personal computer 300 via the personal computer I / F 170, and to file it there. This is effective when the transmission speed of the communication line is lower than the transfer speed of the personal computer I / F 170.

The other is that the coded signal (document) received by the communication means 90 is transferred to the coded document storage means 70 and temporarily stored (this operation is performed in the first embodiment. The encoded signal (document) stored in the encoded document storage means 70 is transmitted to the personal computer I as described above.
The file is transferred to the personal computer 300 via the / F 170, and filing is performed there. This is effective when the transmission speed of the communication line is faster than the transfer speed of the personal computer I / F 170.

According to the present embodiment, the personal computer I / F 170
Even if the transfer rate of the encoded signal (document) is lower than the transfer rate of the communication line, there is an effect that transmission communication using the communication path 100% effectively can be realized.

FIG. 12 is a block diagram showing an eighth embodiment of the facsimile apparatus according to the present invention.

This embodiment is different from the seventh embodiment in that the control means 100 is eliminated, the system bus 2 is changed to a personal computer bus, and the personal computer I / F 170 is changed to a bus I / F 171. Only the seventh embodiment is different from that of the seventh embodiment, but other configurations are the same as those of the seventh embodiment.

The operation of this embodiment is similar to the operation of the personal computer 300.
Performs the same operation as that of the seventh embodiment except that it directly controls the personal computer bus via the bus I / F 171, and further detailed description will be omitted.

According to the present embodiment, since the control means 100 is omitted, there is an effect that the system can be configured inexpensively and compactly.

[0105]

According to the present invention, at least one code bus 3 separate from the system bus (personal computer bus) 2;
At least one coded document storage means 70 capable of storing one or more pages of coded signals (documents) connected to the code bus 3 is provided, and the coding means 31 and the decoding means 32 and the coded document storage means 70 are provided. Is configured so that encoded signals (documents) for one page or more can be input / output at high speed via the code bus 3, so that a system for encoding read image signals and / or encoding In a system for decoding a signal (document) into an image signal and recording the image signal, a document is read and encoded at a constant high speed without using a page memory, and / or the encoded signal is decoded. Thus, recording can be performed at a constant high speed.

The code bus 3 and the encoded document storage means 7
By adopting 0, the encoded signal (document) does not always flow on the system bus (PC bus) 2, so that the load on the system bus 2 can be considerably reduced and the throughput of the entire system can be increased. effective.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a facsimile apparatus according to the present invention.

FIG. 2 is a block diagram showing details of an encoding unit according to the present invention.

FIG. 3 is a time chart showing processing performed by each unit from reading to encoding.

FIG. 4 is a block diagram showing details of a decoding unit of the present invention.

FIG. 5 is a time chart showing processing performed by each unit from decoding to recording.

FIG. 6 is a block diagram showing a second embodiment of the facsimile apparatus according to the present invention.

FIG. 7 is a block diagram showing a third embodiment of the facsimile apparatus according to the present invention.

FIG. 8 is a block diagram showing a fourth embodiment of the facsimile apparatus according to the present invention.

FIG. 9 is a block diagram showing a fifth embodiment of the facsimile apparatus according to the present invention.

FIG. 10 is a block diagram showing a sixth embodiment of the facsimile apparatus according to the present invention.

FIG. 11 is a block diagram showing a seventh embodiment of the facsimile apparatus according to the present invention.

FIG. 12 is a block diagram showing an eighth embodiment of the facsimile apparatus according to the present invention.

FIG. 13 is a block diagram showing an example of a conventional image processing system.

FIG. 14 is a block diagram showing another example of the conventional image processing system.

FIG. 15 is a configuration diagram schematically showing the overall structure of the facsimile apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b Image bus 2 System bus 3, 3a, 3b Code bus 10 Reading means 11 Scanner 20 Reading quality improvement means 22 Scanner interface (I / F) 31 Encoding means 32 Decoding means 50 Recording quality improvement means Reference Signs List 51 Printer interface (I / F) 60 Recording means 61 Printer 70, 71, 72 Encoded document storage means 80 Document management information storage means 90 Communication means 100 Control means 110, 111, 112 Code transfer means 120 Filing means 130 Panel 140 Display Control means 150 Display memory 160 Display means 170 Personal computer interface (I / F) 171 Bus interface (I / F) 300 Personal computer

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Takaoka 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Totsuka Plant, Hitachi, Ltd. (56) References JP-A-1-134575 (JP, A) JP-A-61-109372 (JP, A) JP-A-61-109363 (JP, A) JP-A-1-1522871 (JP, a) JP Akira 63-10875 (JP, a) JP Akira 63-180268 (JP, a) JP Akira 60-47548 (JP, a) (58 ) investigated the field (Int.Cl. ⁶ , DB name) H04N 1/00

Claims (10)

(57) [Claims] 1. An image signal processing system for supplying an image signal obtained by scanning a document to an encoding unit via an image bus, and supplying the encoded signal obtained therefrom to a system bus. A code bus is provided on the output side of the device, and coded document storage means for temporarily storing an output coded signal of the coding means is coupled to the code bus, and the code bus is provided between the code bus and the system bus. Code transfer means for inputting / outputting a coded signal to / from the coded document storage means and transferring a coded signal on the code bus to a system bus, and control means for controlling the entire system on the system bus; A high-speed image signal processing system characterized by combining document management information storage means for storing document management information for managing stored documents in a document storage means. 2. The image processing apparatus according to claim 1, wherein the encoding unit converts the image signal for one scanning line into an encoded signal and outputs the encoded signal within a time required to generate an image signal for at least one scanning line. 2. The high-speed image according to claim 1, wherein the code transfer unit transfers an encoded signal for one scanning line from the output of the encoding unit to the encoded document storage unit within the required time. Signal processing system. 3. The time required to generate an image signal for one scanning line is constant.
The high-speed image signal processing system according to claim 1. 4. An image signal processing system for supplying an encoded signal from a system bus to a decoding unit and supplying the obtained image signal to a recording unit via the image bus.
A code bus is provided on the input side of the decoding means,
An encoded document storage means for temporarily storing an encoded signal is coupled to the code bus, and the encoded signal is input to and output from the encoded document storage means between the system bus and the code bus. Code transfer means for transferring a coded signal of a bus to the code bus is arranged, and control means for controlling the entire system on the system bus and document management information for managing stored documents in the coded document storage means are stored. A high-speed image signal processing system, which is combined with a document management information storage means. 5. The decoding means decodes an encoded signal for one scanning line within a time required to record an image signal for at least one scanning line. 5. The high-speed image signal processing system according to claim 4, wherein an encoded signal for one scanning line is transferred from an encoded document storage unit to said decoding unit within a required time. 6. The time required to record an image signal for one scanning line is constant.
The high-speed image signal processing system according to claim 1. 7. An image signal obtained by scanning a document is supplied to an encoding means via an image bus, and the obtained encoded signal is supplied to a system bus, and the encoded signal is decoded from the system bus. In an image signal processing system for supplying the image signal obtained to the encoding means to the recording means via an image bus, a common code bus is provided to the output side of the encoding means and the input side of the decoding means. In addition to the above, a coded document storage means for temporarily storing a coded signal is coupled to the code bus, and the coded signal is input to and output from the coded document storage means between the code bus and the system bus. Code transfer means for transferring the coded signal of the code bus to the system bus and transferring the coded signal of the system bus to the code bus; A high-speed image signal processing system wherein a control means for controlling the entire system and a document management information storage means for storing document management information for managing stored documents in said encoded document storage means are connected to a stem bus. 8. The high-speed image signal processing system according to claim 7, wherein a common image bus is provided on an input side of said encoding means and an output side of said decoding means. 9. A first code bus is provided on an output side of said encoding means, and first encoded document storage means for temporarily storing an encoded signal is connected to said first code bus, and said first code bus is connected to said first code bus. A first code transfer means for inputting / outputting the coded signal to / from the first coded document storage means and transferring the coded signal of the code bus to the system bus between the code bus and the system bus. A second coded bus on the input side of the decoding means, and a second coded document storage means for temporarily storing a coded signal on the second code bus; Between the code bus and the system bus, the input / output of the encoded signal to / from the second encoded document storage means and the transfer of the encoded signal of the system bus to the second code bus. That the code transfer means was The high-speed image signal processing system according to claim 7, wherein: 10. An image signal obtained by scanning a document is
Is supplied to the encoding means, and the encoded signal obtained therefrom is output to the system.
To the communication line via the system bus, and
Decodes coded signal received on line via system bus
Means for recording the decoded image signal there.
In the facsimile apparatus, the output side of the encoding means
And providing a common code bus on the input side of the decoding means.
And a code for temporarily storing an encoded signal on this code bus.
Coupled to the code bus and the system.
And the encoded document is stored in the encoded document.
Means for inputting / outputting the encoded signal on the code bus.
To the system bus, or
Code transfer means for transferring an encoded signal to the code bus
Arrange the stages and control the entire system on the system bus.
Control means for performing the control of the document stored in the encoded document storage means.
Document management information storage for storing document management information for management
A facsimile machine characterized by combining means .