JP2641883B2 - Image communication device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication device, and more particularly to an image communication device that performs image recording.

2. Description of the Related Art Conventionally, there has been known an image communication apparatus having a buffer memory for storing one-line image data, and processing transmission / reception image data via the buffer memory.

In particular, in a conventional facsimile apparatus having a memory capable of storing a continuous information amount smaller than the information amount allocated to one line, the number of bits of the information amount allocated to one line is determined by the received bit. It was always fixed regardless of the nature of the information.

[Problem to be Solved by the Invention] Here, consider a case where an A4 size document is transmitted in the G3 mode, for example. For A4 size, the length of the original in the main scanning direction is 21
0 mm. For this reason, in the reading system of the transmitter, for example, image data for, for example, 208 mm is determined as valid data.

When encoding is performed on the transmission side, the amount of information allocated to one line is 1728 bits. The effective data amount of 208mm is 208 x when read at a resolution of 8 lines per millimeter.
8 = 1664 bits.

In other words, the effective data of 1664 bits = 208 bytes is stored in the information amount of one line of 1728 bits = 216 bytes, but there is no rule as to from which bit in the data of one line the valid data is stored. Alternatively, the manufacturer of the device may decide freely. The encoded data is subjected to differential phase modulation or quadrature modulation and transmitted to the receiving side.

On the receiver side, on the other hand, the recording paper width is usually ISOA4
It is 210 mm corresponding to the size. Then, left and right 1
Many devices record in the range of 208mm excluding mm.

As described above, the information amount of one line transmitted from the transmission side is 216 bytes, and when recording is performed at a resolution of 8 lines per millimeter, the information amount corresponding to the effective recording width is 208 bytes. . At the time of recording, continuous 208 bytes of data are recorded out of the transmitted 216 bytes of information of one line.

However, in the conventional apparatus, the number of bytes from which recording is started is arbitrary. For example, a process of recording 208 bytes from the fifth byte of the information amount of one line is performed, and the recording start position in the reception line is always fixed irrespective of the property of the received information.

FIG. 3 shows an example of an effective reading position and an effective recording position when A4 size image information is transmitted between conventional facsimile apparatuses.

In FIG. 3, both the effective reading width and the effective recording width are 208 mm = 2.
Consider 08 bytes (8 mm). In the reading on the transmission side, it is assumed that the center 208 mm is read without reading the left and right 1 mm of the document. On the other hand, at the time of recording on the receiving side, recording is performed at 208 mm at the center excluding the left and right 1 mm of the recording paper.

When reading and recording are performed under the above conditions, when the encoding is performed, the read 208 mm, that is, 208 mm
The amount of information that byte data is allocated to one line
At which position in 216 bytes, or when decoding, the amount of information 216 allocated to one line
Which 208 bytes of data to record is important.

In FIG. 3, in the case of the reference character a, for a document m having a width of 210 mm, the center 208 mm of the document is read as valid data e1.

In addition, what is enclosed in a square in the symbol b is 216 mm,
That is, when encoded with 216 bytes per line, it represents the amount of information allocated to one line. in this case,
As shown by the arrow, from the first byte of the data allocated to one line, the effective read data e1 is 208 mm.
Stores minutes.

On the other hand, reference numerals c and d in FIG. 3 represent a recording process on the receiving side. In the case of code c, when decoding is performed, 208 bytes of the 9th to 216th bytes of the 216 bytes allocated to one line are recorded as valid recording data e2. In this case, 10 mm from the left side of the actual original m
The eye data is recorded from the 2 mm left of the recording paper p, and the 8 mm data is not recorded on the left end side.

In the case of the code d, the effective data of the 5th to 212th bytes of the 216 bytes allocated to one line when encoding is performed, that is, the encoded 208 bytes at the center are recorded as effective recording data. . Even when this 208 bytes, that is, 208 mm of data is recorded on the recording paper, the data of 6 mm from the left side of the actual original is recorded on the recording paper.
The data is recorded from the mmth position, and 4 mm data is not recorded on the left end side.

That is, in the related art, since the receiver does not know where valid data is stored in the 216-byte data allocated to one line, the data position of the original and the recording position when the data is recorded on the recording paper There are drawbacks such as misalignment and lack of original data.

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a receiving unit for receiving image information, and the image information received by the receiving unit are stored in an effective recording area corresponding to a recording sheet. Recording means for recording, position detecting means for detecting the position of valid image information in the image information received by the receiving means, position of the valid image information detected by the position detecting means, and By comparing the positions, a position determination unit that determines whether the effective image area is outside the effective recording area, and the position determination unit determines that the effective image area is outside the effective recording area. According to this configuration, an adjustment unit that adjusts the recording position of the effective image information so that the effective image information other than the effective image area enters the effective recording area is adopted.

Further, according to the present invention, the size of the effective image information is detected by comparing the size of the effective image area detected by the size detection means with the size of the effective recording area. Size determining means for determining whether the size of the area is smaller than the size of the effective recording area, wherein the adjusting means determines that the size of the effective image area is smaller than the size of the effective recording area by the size determining means. Is determined to be small, and in response to the position determination unit determining that the valid image area is outside the valid recording area, the valid image information other than the valid image area is stored in the valid recording area. To enter
A configuration for adjusting the recording position of the effective image information is employed.

[Operation] According to the configuration described above, in response to the determination that the effective image area in the received image information is outside the effective recording area corresponding to the recording paper, the effective image outside the effective image area is determined. Since the recording position of the effective image information is adjusted so that the information enters the effective recording area, it is possible to prevent the effective image in the received image from being lost.

EXAMPLES Hereinafter, the present invention will be described in detail based on examples shown in the drawings.

FIG. 1 is a block diagram showing an embodiment of a facsimile apparatus according to the present invention. In the figure, reference numeral 2 denotes an NCU which uses a telephone network for data communication or the like, and performs connection control of a telephone switching network by connecting to a terminal of the line, switching to a data communication path, and holding of a loop. It is. The signal line 2a is a telephone line. The NCU 2 receives the signal on the signal line 34a, and if the signal level is "0", connects the telephone line to the telephone side, that is, connects the line 2a to the signal line 2b.
If the signal level of the signal line 34a is "1", the telephone line is connected to the facsimile apparatus, that is, the line 2a is connected to the signal line 2c. Under normal conditions,
The line 2a is connected to the telephone.

Reference numeral 4 denotes a telephone (or handset) for line control and communication.

Reference numeral 6 denotes a hybrid circuit that separates a transmission system signal and a reception system signal. That is, the transmission signal on the signal line 16a passes through the signal line 2c and is transmitted to the telephone line via the NCU 2. The signal sent from the other party is output to the signal line 6a via the signal line 2c after passing through the NCU 2.

Reference numeral 8 denotes a reading circuit, which is located in the main scanning direction 1
The image signals for the lines are sequentially read to create a signal sequence representing the binary values of white and black. It is composed of an image sensor such as a CCD (Charge Coupled Device), an optical system, and a document transport system. The binary signal sequence of white and black is output to the signal line 8a.

Reference numeral 10 inputs the data output to the signal line 8a,
MH (Modified Huffman) or MR (Modified Read) encoded data is output to the signal line 10a.

Reference numeral 12 indicates a known CCITT recommendation V27ter (differential phase modulation)
Alternatively, it is a modulator that performs modulation based on V29 (quadrature modulation). The modulator 12 receives the signal on the signal line 10a, performs modulation, and outputs modulated data to the signal line 12a.

Reference numeral 14 denotes a modulator that performs modulation based on the known CCITT recommendation V21. The modulator 14 receives the procedural signal on the signal line 34b, modulates the signal, and outputs modulated data to the signal line 14a.

Reference numeral 16 denotes an adder that inputs the signals of the signal lines 12a and 14a and outputs a result of the addition to the signal line 16a.

Reference numeral 18 denotes a demodulator that performs demodulation based on the known CCITT recommendation V21. The demodulator 18 receives the signal on the signal line 6a and
One modulation is performed, and the demodulated data is output to the signal line 18a.

Reference numeral 20 denotes a demodulator that performs demodulation based on the known CCITT recommendation V27ter or V29. The demodulator 20 receives the signal on the signal line 6a, performs demodulation, and outputs demodulated data to the signal line 20a.

Reference numeral 22 denotes a memory circuit that stores the demodulated data output to the signal line 22a. When an output start pulse is generated on the signal line 34a, the memory circuit 22 outputs data stored in the memory to the signal line 22a.

Reference numeral 24 denotes the input of the demodulated data output to the signal line 20a when the signal of the signal level "0" is output to the signal line 34d, and the transmission of the MH or MR decoded data to the signal line 34d.
The decoding circuit outputs the signal to the signal line 24b every time the decoding of one line is completed. When the signal of signal level "1" is output to the signal line 34d, the decoding circuit 24 inputs the demodulated data output to the signal line 22a and outputs the MH or MR decoded data to the signal line 24a. Output.

Reference numerals 26 and 30 denote line buffers for one line, that is, 1728.
It has a bit capacity. A plurality of line data are sequentially input to the line buffer 26 from the decoding circuit 24 via the signal line 24a, and the OR circuit 28 including an OR gate or the like sets black information (signal level "1". White information. Is a signal level “0”.) The data in the line buffer 30 and each bit are logically ORed. The result of this OR operation is stored in the line buffer 30 again. This OR operation is performed when the decoding circuit 24 generates a pulse on the signal line 24b. By repeating this calculation, the head of valid data can be recognized by checking the position of the black information of the data in the line buffer 30.

The line buffer 30 can be cleared to all "0" (white information) by the pulse of the signal line 34e generated by the control circuit 34. The line buffer 30 includes a logic circuit for performing a programmable bit operation, and determines whether black (“1”) information exists at a byte position (counted from the left end of the line data) given to the signal line 34f. judge. The determination result is output to the signal line 30b.
The determination result is expressed by a signal level “1” when there is black information, and by a signal level “0” when there is no black information.

Reference numeral 32 denotes a recording circuit by a thermal printer or the like. The recording circuit 32 does not perform recording when the signal of the signal level “0” is output to the signal line 34h. Also, the recording circuit
32 outputs the signal of the signal line 34g when the signal of the signal level "1" is output to the signal line 34h, and starts from the left end of the recording paper from what byte of the information amount allocated to one line. The recording operation is performed by recognizing whether to record at a position of 2 mm. The effective recording width is 208 mm.

Reference numeral 34 denotes a control circuit including a microprocessor or the like, which controls the operation of the entire apparatus in accordance with a program described below stored in the ROM 34r. The RAM 34s connected to the control circuit 34 has a control counter K, which will be described later, and a memory area.
FB, LB, etc. are set.

FIGS. 2A and 2B show the flow of a control program of the control circuit 34 shown in FIG. FIG. 2 (A), (B)
Are consecutive at the same number position.

When the power of the apparatus is turned on, the control circuit 34 first outputs a signal of signal level "0" to the signal line 34h in step S42 to inhibit the operation of the recording circuit.

In step S44, a signal of the signal level “0” is output to the signal line 34a to turn off the CML relay of the NCU 2,
The line 2a is connected to the telephone 4.

In step S46, it is determined whether facsimile reception has been selected. When facsimile reception is selected, the process proceeds to step S50. If facsimile reception has not been selected, the process proceeds to step S48.

Step S48 shows processing other than reception, such as transmission and copying of an original.

In step S50, a signal of signal level "1" is output to the signal line 34a, and the CML relay of the NCU 2 is turned on.
Connect the line 2a to the facsimile machine.

In step S52, a buffer clear pulse is output to the signal line 34e to clear the line buffer 30.

 In step S54, a known pre-communication procedure is performed.

In step S56, the received image information is stored in the memory circuit 22. At this time, a signal of signal level "0" is output to the signal line 34d, and the receiving lines are sequentially ORed with respect to black information by the line buffer 30, and the result is stored in the line buffer 30.

 A step S58 performs a post-communication procedure.

In step S60, a signal having a signal level “0” is output to the signal line 34a, the CML relay of the NCU 2 is turned off,
The line 2a is connected to the telephone 4.

In steps S62 to S70 of FIG. 2 (B), it is checked at which byte the first appearing black information appears, and the number of bytes is stored in the memory indicated by the label FB.

In step S62, 1 is stored in a counter K for counting the number of bytes of processed data.

In step S64, the value of K is output to the signal line 24f.

In step S66, the signal line 3 of the line buffer 30
It is determined whether the signal level of 0b is "1", that is, whether the byte indicated by the counter K output in step S60 includes black information. When the signal level of the signal line 30b is “1”, the process proceeds to step S72, and when the signal level is “0”, the process proceeds to step S68.

In step S68, the counter K is incremented by one.

In step S70, it is determined whether the value of the counter K is 217, that is, whether an all white line has been detected.
When the value of the counter K is 217, the process proceeds to step S86. When the value of the counter K is not 217, the process proceeds to step S64.

In step S72, the value of the counter K is stored in the memory FB indicating the byte position of the black information that first appears.

In steps S74 to S82, the number of bytes of the last appearing black information is obtained and stored in the memory LB.

In step S74, 216 is stored in the counter K.

In step S76, the value of the counter K is output to the signal line 24f.

In step S78, the signal line 3 of the line buffer 30
It is determined whether 0b is the signal level "1", that is, whether black information is included in the byte position by the counter K output in step S76. When the signal level of the signal line 30b is "1", the process proceeds to step S82, and when it is "0", the process proceeds to step S80.

In step S80, the value of the counter K is reduced by one.

In step S82, the value of the counter K is stored in the memory LB at the byte position of the black information that appears last.

In step S84, the number of byte positions of the first black information is subtracted from the number of byte positions of the black information that appeared last,
It is determined whether the number obtained by subtracting 1 exceeds 208. If it exceeds 208, proceed to step S86,
In the following cases, the process proceeds to step S88.

In step S86, “5” is output to the signal line 34g. That is, the data of the 5th to 212th bytes is recorded at a position of 2 to 209 mm from the left end of the recording paper.

In step S88, it is determined whether the first black information appears in the first to fourth bytes. When the first black information appears in the first to fourth bytes, the process proceeds to step S94. When the first black information does not appear, the process proceeds to step S90.

In step S90, it is determined whether the last black information appears in the 21st to 216th bytes. Last black information is 21
When it appears at the 3rd to 216th bytes, the process proceeds to step S92, and when it does not appear, the process proceeds to step S86.

In step S92, 207 is subtracted from the contents of the memory LB, and the value is output to the signal line 34g. That is, the memory L
207-byte data before the position indicated by B is recorded at a position of 2 to 209 mm from the left end of the recording paper.

In step S94, the value of the memory FB is output to the signal line 34g. That is, 207-byte data from the position indicated by the memory FB is recorded at a position 2 to 209 mm from the left end of the recording paper.

In step S96, a signal of signal level "1" is output to the signal line 34d, and recording of data from the memory circuit is selected.

In step S98, a signal of the signal level "1" is output to the signal line 34h, and the recording circuit 32 is activated.

In step S100, the recording operation is performed by the recording circuit 32.

As described above, according to the present embodiment, the line buffer 30
Then, the logical sum information relating to the black information of a plurality of lines is formed one after another, and the position of the effective black information in the reception line information can be determined by detecting the leading black information. Then, by starting recording from the position of the detected valid information, valid image information can be completely recorded without causing a loss of image information at both ends of the recording width as in the related art.

In the above embodiment, the case where the A4 size information is transmitted in the G3 mode is considered, but the information size, coding method, and transmission method to be transmitted may be other methods.

Further, in the above embodiment, the position where the effective information is stored can be recognized by calculating the logical sum of the plurality of line information and the black information. However, among the 216 bytes of line information allocated to one line, the first and the last appearing black information are checked to see which byte each is, and valid data from the transmitter side is checked. The stored position may be recognized.

[Effects of the Invention] According to the present invention, when it is determined that the effective image area in the received image information is outside the effective recording area corresponding to the recording paper, the effective image area other than the effective image area is determined. Since the recording position of the effective image information is adjusted so that the image information enters the effective recording area, that is, the recording position of the effective image information is adaptively adjusted according to the received image information. There is an excellent effect that the effective image in the image can be prevented from being lost.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a facsimile apparatus according to the present invention, FIGS. 2 (A) and 2 (B) are flowcharts showing control procedures of a control circuit of FIG. 1, and FIG. FIG. 5 is an explanatory diagram showing an example of an effective reading position and an effective recording position when information is transmitted in A4 size. 2 NCU, 4 Telephone 6 Hybrid circuit, 8 Reading circuit 10 Encoding circuit 12 V27ter or V29 modulator 14 V21 modulator, 16 Addition circuit 18 V21 Demodulator 20 ... V27ter or V29 demodulator 22 ... Memory circuit, 24 ... Decoding circuit 26 ... Line buffer, 28 ... OR circuit 30 ... Line buffer, 32 ... Recording circuit 34 ... Control circuit

Claims (2)

(57) [Claims] A receiving unit for receiving the image information; a recording unit for recording the image information received by the receiving unit in an effective recording area corresponding to a recording sheet; Position detection means for detecting the position of the effective image information; comparing the position of the effective image information detected by the position detection means with the position of the effective recording area, wherein the effective image area is other than the effective recording area Position determining means for determining whether or not the valid image information is located outside the valid image area in response to the position determining means determining that the valid image area is outside the valid recording area. An image communication device comprising: an adjustment unit configured to adjust a recording position of the effective image information so as to enter the effective recording area. 2. A size detecting means for detecting a size of the effective image information, and a size of the effective image area detected by the size detecting means is compared with a size of the effective recording area. Size determining means for determining whether or not the size of the effective recording area is smaller than the size of the effective recording area; and the adjusting means determines that the size of the effective image area is smaller than the size of the effective recording area by the size determining means. Is determined, and the valid image information other than the valid image area enters the valid recording area in response to the position determining unit determining that the valid image area is outside the valid recording area. 2. The image communication device according to claim 1, wherein the recording position of the effective image information is adjusted as described above.