JPS5916467A - Facsimile communication system - Google Patents

Abstract

PURPOSE:To improve transmission efficiency, by degenerating facsimile picture element information in the direction of main scanning and subscanning, and compressing the pattern storage information of a dot matrix image by band compressing coding. CONSTITUTION:A central control section CC103 of a CPU100 sets character information and requests the generation of picture information to a picture information generator PGEN110. Thus, a picture information generating control section PGCONT114 outputs virtual screen information, which is transmitted to a cocer COD120 one by one line's share, where band compressing coding is performed. The partial information of the coded virtual screen is transferred to the CPU100, degenerated with the incorporated program processing and assembled as the one virtual screen information and transmitted to a communication line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a facsimile communication method, and more particularly to a method for transmitting facsimile drawing information generated within a facsimile storage device.

Conventionally, in facsimile communication via a facsimile storage device, image information and communication certification information (character information such as transmission/reception time, terminal number, etc.) generated in this storage device are generally known as image creation information within the storage device. Modify Huffman (MH) method and Modify Lead (M
General facsimile image information (image information from a facsimile transmitting terminal) that has been band-compressed using encoding technology such as
The communication certificate information may be sent to the facsimile receiving terminal in the same manner as above, or the communication certificate information may be sent as character information to the facsimile receiving terminal and then created by a character generator installed on the receiving terminal side.However,
In the former case, the amount of information to be transmitted is large and transmission efficiency inevitably decreases. Furthermore, in the latter case, the types of information generated are limited and the cost of the terminal inevitably increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile communication system that enables efficient transmission of facsimile information generated in a facsimile storage device without significantly adding functionality to each facsimile receiving terminal device.

The facsimile communication system according to the present invention (c) facsimile data generated in the facsimile storage device +) pixel information in the main scanning and sub-scanning directions respectively] /n degenerates each pixel m
The pattern memory information of a dot matrix image that represents x*m as one dot is converted into one by band compression encoding.
It is characterized in that it is transmitted to the facsimile receiving terminal device as image information compressed in the amount of information of /rrIX-nIy·α.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are diagrams showing the configuration of a facsimile storage device and a facsimile+) receiving terminal device in an embodiment of the facsimile communication system according to the present invention.

First, referring to FIG. 1, the facsimile storage device includes a central processing unit (CPU) 100c, a data channel (DCH) 101, a main memory (MM) to2, a mote setting port ft7. (MS) 1031 and a central control unit (CO) 103.

In addition, the image information assembly section f that constitutes the facsimile storage equipment
l(PGEN) 110 includes a pattern selection unit (SEL) 111 that determines which pattern storage information of each ff(mxxm,) dot matrix structure is selected, and 5BLI 1.
a pattern information storage unit (PTNMEM) 112 that stores a group of pattern information selected by 1; a picture information assembly unit (PASS) 113 that creates screen line information for assembling a virtual screen by combining pattern storage information; Picture information generation control section (PGCONT) 11 that controls each section
4. PQEN 110 is a coding device (CO
D) 120Ki continuous rail. CPU10o and PGEN1
10 are interconnected via buses (BUs) 13o. A communication control unit (CCU) 140 is connected to the BUS 130, and CCU1, 40 is a tl' demodulator (MODEM).
) 150 to interface with a facsimile receiving terminal device to be described later.

Next, referring to FIG. 2, the facsimile receiving terminal device that interfaces with the facsimile storage device described above includes a modem and modulator (MODEM) 201, a transmission control section (T
C) 202, a decoder (DEC) that decodes encoded information
204, general facsimile (MDS) 203, decoded information is sent 1 in the main scanning direction according to the contents of the MDS 203.
Expander (EXP) 205.1 that replaces dots with rudo and dots
Buffer memory (BUF) 2 that stores information for lines
061, a facsimile IJ mechanism unit (MCH) 207 having a configuration similar to that of a general facsimile receiving terminal device, and a reception control unit (RCNT) including a step control circuit (SCNT) 2081 in the sub-scanning direction. )2
08.

Next, the operation will be explained with reference to FIGS. 1 and 2. In the case of facsimile information generated internally in the facsimile storage device as image information such as characters and symbols, the CPU
CClO3 of OO is the character type as character information,
Set the character size, paper (picture) size, etc. in the mode register (REG) of the MS 1031, and then set the PGCON of the PGEN 110 via the DCHIOI and BUS130.
An image information generation request is made to Tl 14. Thereby, PGCONT 114 identifies the storage address of PTNMEM 112 through built-in program processing and transmits this address to 5ELIII. S'EL'l 11
Here, the X corresponding to each character symbol of the pattern information stored in the PTNMEM 112 as a dot matrix image.

Specify Y address. Under the control of the PGCON'I' 114, this pattern information is read out to the PASs 113 and sequentially developed one pattern at a time in the memory of the PASSl 13. As a result, one line of the virtual screen is formed within the PASS 113. For example, if the image size is A4 and the degree of degeneracy is specified as 1/6, three machines (GI,
GII, GW), A4 size with 8 dots in the main scanning direction)
In the case of 7mm, the main scanning direction information amount in PASS113 is 287 (a page break is made when the child is reached.The information of the virtual screen created in this way by PASS113 is sent line by line to C0D120 and band compression code The C6D120 is compatible with the commonly used MH method and M
Since it has the same configuration as the R system encoding device, I will not mention the detailed configuration (9).The partial information of the virtual screen encoded one dot line at a time by C0D120 is sent to BUS130.
The data is transferred to the CPU OOK via the CPU and assembled into the MM 102 as virtual screen information through built-in program processing. This virtual image information incorporates the contents of the mode register (REG) of the MS 130i into the facsimile transmission control procedure.
It is sent out to the communication line via DEMI 50. Generally speaking, when specifying a dense screen with a general-purpose facsimile terminal such as the three CCITT Group machines, as shown in Figure 3, 8 dots/-9 in the main scanning direction of an A4 size image/8 dots/-9 in the sub-scanning direction. The picture is expressed as a collection of minute dots, and each character and symbol is composed of 60 x 42 dots. When a general transmission manuscript image is sampled by a facsimile transmission terminal device, quantum loss occurs during sampling, and in order to make it possible to sufficiently distinguish character symbols of the size of a 4 mark, fine sampling is required. However, if it is image information generated within a storage device, it is possible to create patterns that minimize quantum loss depending on the size of characters and symbols.

For example, in the case of Figure 4, a character with a degeneracy level of 1/6 that fits within a size of 5.25 mm wide x 7.5 mm high is expressed, and 6 dots and 6 lines are expressed as the same pixel information. (・In other words, each pixel of a 6×6 dot matrix is expressed as one dot. In this example, the minimum unit of one line segment is expressed with a thickness of 6/8 wm, but it is The thickness of the letters in the calligraphy is HWn, which is slightly thicker than this (・It is expressed as a line segment. Note that the diagonal lines are processed with smooth ink (・, so they appear jagged. This strange feeling is caused by
×3 dots matrix (1 dot) Kfif! You can get rid of it by using backward expressions. The above-mentioned PTNMEM112 has the fourth
The pattern information of the dot matrix image shown in the figure is
, Y addresses are stored. Also, PTNME
As shown in FIG. 5, the pattern information read from M112 to PASS113 is information for one line of a virtual screen consisting of a 7x10 dot matrix for each character symbol.
113. Here, since each line is composed of 41 characters, the amount of information in the line direction is 287 bits.

The line information of this virtual screen is in Ill@NextC0D120 (
・After band compression encoding is performed for each IV cut line, the CP
This is stored in the MM 102 of the U 100 as image information constituting one virtual screen. Here is PGENllo's PASS11
An example of creating virtual picture information by band compression encoding the row information of the virtual picture accumulated in 3 using the MH method will be explained in comparison with the conventional technology. For example, the line information of PASS113 is 4
In the case of one continuous number "1°", the first dot line encoded in C0D 120 (the position corresponding to the top dot line in FIG. 6) is 1720 as shown in the diagram in the prior art. 11° of bit, ’0
' It can be expressed as an information string, and when this is band compression encoded and becomes temporary furnace image information, it becomes 51 as shown in Fig. 7.
This will be stored in the MM 102 as a 7-bit information string. In the embodiment of the present invention, since the similar first dot line is an IA degenerate information string of 287 bits (7 pits for each number) as shown in FIG.
The virtual image information can be stored in the MM 102 as virtual image information in a 308-pit information array as shown in the figure.

As mentioned above, the information created with PGENIIO generally has a correlation in the main scanning direction and the sub-scanning direction. When IK is applied to an image in which each pixel is degenerated by one in the direction and the sub-scanning direction and each pixel m .

In the example of Figure 6, 4. ×, H = information amount is compressed. In the figure, the .mark indicates a black sampling point, and the 0 mark indicates a white sampling point.

On the other hand, information transmitted from the facsimile storage device is demodulated by a modem (MODEM) 201, processed by a transmission control unit (TC) 202 based on a transmission control procedure, and is processed as general facsimile image information or generated within the storage device. Image information is identified, and each mode is selected in the mode selection section (M
DS) 203. The MDS 203 has a degeneracy degree display register (REQ) having the same structure as the mode register (BEG) of the MS 1031 in FIG. General facsimile image information and virtual image information are T0
202 is transferred to the DEC 204 and decoded.

Here, if the image information is general facsimile image information, MD
RE gated by MS bit output of S203
The data is written and transferred to the BUF 2061 via the selector game (SELI) 2062 of the C 206, thereby receiving normal facsimile image information. Further, in the case of virtual image information generated within the storage device, this information is transferred to a buffer (BUF) of EXP 205. MD8 for EXP 205
The image information degenerate value from 203 is set in the counter (CNT), and the value in the adder (INC) is set in the comparator (CM
P), the information of BUF of EXP205 is transferred from the driver (DR) to the selector gate (5E of REC206).
L2) 2063 to the BUF 2061. Therefore, each dot of the degenerated virtual image information is enlarged and transferred by n dots. Here, REC206
The BUF2061 inside has a storage capacity for at least one line of image information to be finally output, and the MS of MD8203
Bits are used to selectively store general facsimile image information from the DEC 204 or virtual image information from the BXP 205. On the other hand, in the sub-scanning direction, Similarly to the main scanning direction described above, the degenerate value from the MDS 203 is set in the counter (CNT) in the step motor step control unit (SCNT) 2081 of the RCNT 208, and the value is added to the adder (INC).
The step motor of MCH2O7 is controlled step by step every time one line image information recording is completed until the values become equal in the comparator (CMP), and the degenerated l line image information is enlarged and recorded into n line image information. Thereby, virtual image information generated in the facsimile storage device can be transferred at high speed to the facsimile receiving terminal device.

As described above, according to the present invention, pixel information of facsimile information generated in a facsimile storage device is degenerated by l/n in the main scanning direction and the sub-scanning direction, and each pixel mx@m, dot is By compressing the pattern storage information of a dot matrix image expressed by one dot using an encoding technique such as the MH method or the MR method, and transmitting it as virtual image information to a facsimile receiving terminal,
By transmitting image information such as a transmitted image, the facsimile receiving terminal device only needs to perform expansion processing on each pixel information and record it. Therefore, a wide variety of virtual image information can be stored without major functional changes. can be received.

[Brief explanation of the drawing]

1 and 2 are diagrams showing a configuration example of a facsimile storage device and a facsimile receiving terminal device in an embodiment of the facsimile communication system according to the present invention, FIG. 3 is a diagram showing a general facsimile image configuration, and FIG. is 5.25m□
X 7.5. ? □A diagram showing an example of pattern storage information in which a 6×6 dot matrix pixel of a character is represented by one dot pixel. FIG. 5 is a diagram showing an example of the configuration of one line of virtual screen information stored in the image information assembly section. The figures are diagrams showing examples of image information sampling, Fig. 7 (5), Fig. 7 0, Fig. 7 0, and Fig. 7 0.
1 is a diagram showing a conventional example and an embodiment of the present invention in which virtual screen row information is band-compressed encoded to create virtual image information. FIG. In Figure 1; 100 (CPU)...Central processing unit, 10
1 (DCH)...Data channel, 10210
2 (...main memory section, 103 (CC) central control section, 1031031 (...mode setting circuit, 11
0 (PGEN)...Picture information generation device, 111
(SEL)...Bang selection section, 112 (PTN
MEM)...Pattern information storage section, 113
(P As5)... Image information assembly department, 114 (
PG C0NT)... Image information generation control section, 12
0(CC)D)... Encoding device, 130 (B
202 (TC)... Transmission control section, 203 (MD
S)...=mode selection section, 2'04 (DEC)
...Decoder. 205 (EXP)...Extender, 206 (REC
)...Recording section, 2061 (BUF)...
・Nokura Hua Memory, 207 (MCH)...mechanism section, 208 (RCNT)...reception control section,
2081 (S C0NT)...Step motor step control section. 7-'-・Representative Patent Attorney Uchihara Hashi) = 1
(7 F, end of F, 3 Figure pF) 6 Figure Yz y/Y! Figure 4

Claims (1)

[Claims] The facsimile pixel information generated in the facsimile storage device is degenerated by 1/n in the main scanning page direction and the sub-scanning direction for each pixel. The pattern storage information of a dot matrix image representing one dot for mx '' my dots is transmitted to the facsimile receiving terminal device as image information compressed by the amount of information of 1/mx-m,.alpha. by band compression encoding. facsimile communication method.