JPH08125801A - Facsimile adaptor - Google Patents

Abstract

PURPOSE: To reduce an error rate and to decrease a communication time by eliminating excessive fill data added over a minimum scanning time declared by a wired system facsimile equipment at a transmitter side so as to obtain image data for the minimum scanning time declared by a receiver side facsimile equipment. CONSTITUTION: An EOL(end of line) detection section 5 detects a first '1' from the detected fills as detection of an EOL and informs it to a 1-line data counter section 6. The 1-line data counter section 6 counts the quantity of data between the EOLs attended with transfer of data by an image data transfer fill elimination section 2. The 1-line data counter section 6 counts a data quantity corresponding to a minimum scanning time and informs it to a transfer output control section 7. Then the transfer output control section 7 gives an instruction to the image data transfer fill elimination section 2 to allow the section 2 to eliminate excessive fills under the condition that the fill detection section 4 detects fills and transfer of the data quantity for a minimum scanning time by the 1-line data counter section 6 is counted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile adapter which is interposed between a wired facsimile device and a wireless device to perform protocol conversion.

[0002]

2. Description of the Related Art In a facsimile, mutual communication capabilities are presented in a communication protocol, the maximum capabilities of each other are determined, and communication is started. One of the capabilities that is determined is the minimum scan line time capability, which indicates the time required to process one line of facsimile image data.
This is important when the image processing time of the receiving side facsimile device is inferior to the image processing time of the transmitting side. At this time, the transmitting side facsimile device adjusts the transmission data within a range that the receiving side facsimile device can process. . As a general method, the sending facsimile sends image data 1 to be sent.
When the line portion is less than the minimum scanning line capacity obtained by the capacity exchange, dummy data (fill data) unnecessary for processing on the receiving side is added to the transmission data and transmitted.

[0003]

In the prior art, when the image processing capability of the transmitting facsimile is lower than the image processing capability of the receiving facsimile, the (n + 1) th line of the (n + 1) th line is being transmitted while the image data of the nth line is being transmitted. Since a state in which the image data cannot be prepared occurs, if the image data of the (n + 1) th line is transmitted, there is a risk that the image processing of the transmitting side facsimile will not be in time and an underflow may occur. Therefore, until the image data of the (n + 1) th line is prepared,
Lines before the (n + 1) th line (for example, the nth line)
This underflow was prevented by inserting and sending fill data to. However, since the transmitting facsimile inserts and transmits the fill data until the image data of the next line is prepared, there is a problem that the receiving facsimile waits.

Especially when the public line network is wireless,
Since it is easily affected by noise and the bit error rate is considerably higher than that of the wired public network, adding extra data such as fill data raises the line error rate and causes the receiving side facsimile to wait. Will have.

The present invention has been made in view of the above problems, and removes extra fill data from the communication data of the facsimile on the transmitting side and sends it to the facsimile on the receiving side. Smaller,
The purpose is to reduce the communication time.

[0006]

According to a first aspect of the present invention, there is provided a facsimile adapter which is interposed between a wired facsimile device and a wireless device and performs protocol conversion. When the image data cannot be transmitted with the minimum scanning line time capability declared by the side facsimile device, the excess fill data added over the minimum scanning line time declared by the wired facsimile device on the transmitting side is removed. , The image data of the minimum scanning line time declared by the receiving side facsimile apparatus.

A facsimile adapter according to a second aspect of the present invention is interposed between a wired type facsimile apparatus and a wireless apparatus,
In a facsimile adapter that performs protocol conversion,
A wired facsimile protocol processing unit that receives image data from the wired facsimile device, a wireless facsimile protocol processing unit that sends image data to the receiving-side facsimile device via the wireless device, and the wired facsimile protocol. A fill detection unit that detects fill data added to the transmission image data output from the processing unit, an EOL detection unit that detects the end of one line of the transmission image data, and a count of data of one line of the transmission image data. A 1-line data counter section, a transfer output control section for instructing transfer output of 1-line data via the wireless device, and the transmission image data from the wired facsimile protocol processing section to the wireless facsimile protocol processing section. At the same time as transferring, excess fill data is transferred and output Those comprising an image data transfer fill deleting unit for deleting according to the instructions of the control unit.

A facsimile adapter according to a third aspect of the present invention is interposed between a wired type facsimile apparatus and a wireless apparatus,
In a facsimile adapter that performs protocol conversion,
A wired facsimile protocol processing unit that receives image data from the wired facsimile device, a wireless facsimile protocol processing unit that sends image data to the receiving-side facsimile device via the wireless device, and the wired facsimile protocol. A fill detection unit that detects fill data added to the transmission image data output from the processing unit, an EOL detection unit that detects the end of one line of the transmission image data, and a carrying time of one line data of the transmission image data. 1-line data time measuring unit for measuring
A transfer output control unit for instructing transfer output of one line of data via the wireless device, and transfer of the transmission image data from the wired facsimile protocol processing unit to the wireless facsimile protocol processing unit, and at the same time excess fill data An image data transfer / fill deletion unit for deleting the image data according to an instruction from the transfer output control unit.

[0009]

According to the first aspect of the present invention, when the wired facsimile machine on the transmitting side cannot transmit the image data with the minimum scanning line time capability declared by the facsimile machine on the receiving side, the wired facsimile machine on the transmitting side operates as described above. Excessive fill data added beyond the declared minimum scanning line time is removed, and the image data is made compact by using the image data of the minimum scanning line time declared by the receiving facsimile machine.

According to a second aspect of the present invention, a wired facsimile protocol processing unit that receives image data from a wired facsimile device and a wireless facsimile protocol processing unit that sends image data to a receiver-side facsimile device via the wireless device. In between, the transmission image data is transferred from the wired facsimile protocol processing unit to the wireless facsimile protocol processing unit, and at the same time, the fill detection unit and E
Fill data and EOL are grasped by the OL detection unit, and 1
The line data counter unit counts the data of one line, and the transfer output control unit instructs the transfer output of the data of one line, whereby the wired facsimile device on the transmitting side declares the wired facsimile device on the receiving side. The excess fill data added for the minimum scanning line time or more is removed, and the image data of the minimum scanning line time declared by the facsimile apparatus on the receiving side is removed to make the image data compact.

According to a third aspect of the present invention, the one-line data counter section for counting the data of one line according to the second aspect is a one-line data time measuring section for measuring the carrying time of the one-line data. The measurement operation is measured as the time for one line to be transmitted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A facsimile adapter according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a facsimile adapter according to the first embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the overall configuration of a facsimile adapter according to the second embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a wired facsimile protocol processing section for communicating with a commercially available wired facsimile apparatus, whereby the wired facsimile apparatus operates as a modem connected to an ordinary telephone line. Reference numeral 2 denotes an image data transfer / fill deletion unit that transfers transmission image data to the wireless facsimile protocol processing unit and at the same time deletes excess fill data (hereinafter, simply referred to as “fill”). Reference numeral 3 denotes a wireless facsimile protocol processing unit for a wireless device including a wireless communication device such as a mobile phone or PHS. The wired facsimile protocol processing unit 1 and the image data transfer / fill deletion unit 2 provide wired and wireless facsimile protocols. To be converted. Reference numeral 4 is a fill detector for detecting a fill added to the image data, and 5 is EOL (End of End) for detecting the end of the image data for one line.
Line) detection unit, 6 is a 1-line data counter unit that counts 1-line data, 7 is a transfer output control unit that instructs transfer output of 1-line data, and 8 is a main control unit that manages overall control. is there. A line data processing unit 10 includes an image data transfer / fill deletion unit 2, a fill detection unit 4, an EOL detection unit 5, a line data counter unit 6, and a transfer output control unit 7.

In FIG. 2, the difference between the second embodiment and the first embodiment is that the one-line data counter section 6 for counting the data of one line in the first embodiment is set to the conveying speed of the one-line data. 1 line data time measuring unit 6 for measuring
It is set to 0. The line data processing unit 10 in this embodiment includes an image data transfer / fill deletion unit 2, a fill detection unit 4, an EOL detection unit 5, a line data time measurement unit 60, and a transfer output control unit 7.

FIG. 3 is an explanatory diagram showing the structure of image data for one line.

In the figure, one line consists of image data and a fill and EOL added as necessary. EOL is 11 "0" + "1" for MH code, and 11 "0" + "1" + "tag" for MR code.

FIG. 4 is an explanatory diagram in which the structure of the image data of one line is expressed by the scanning line time, and FIG. 5 is an explanatory diagram in which the structure of the image data of one line is adjusted as the minimum scanning line time of one line. Is.

In FIG. 4, the minimum scanning line time for one line is defined as the time required to process this data. Therefore, if the communication speed of the image data and the minimum scanning line time for one line are determined, the data amount per one line is also determined. Whether or not one line satisfies the minimum scanning line time is determined by the 1-line data counter unit 6 of the first embodiment.
This is realized by counting the amount of data per line and measuring the sending time of the one-line data time measuring unit 60 of the second embodiment.

As in the image data shown in FIG. 4, the A line is smaller than the minimum scanning line time of one line, the B line is the same as the minimum scanning line time of one line, and the C line is the minimum scanning line time of one line. It is assumed that it is larger than the scan line time.

Normally, when the minimum scanning line time of one line is declared from the receiving side, the transmitting side adds a fill and EOL in the case of the A line which does not reach the minimum scanning line time as shown in FIG. It is adjusted as the minimum scan line time for one line.
In the case of the B line that matches the minimum scan line time, nothing is processed.

However, the minimum scanning line time of one line may be longer than the time declared by the receiving side, such as the C line, depending on the image reading and coding capabilities of the transmitting side. For example, if an image is read and encoded at the time of transmission by a facsimile machine that does not have a code memory on the transmission side, image reading generally takes several ms per line due to the restrictions of CCD reading performance and mechanical control of the recording system.
It usually takes some time. Further, in the case of a facsimile apparatus which performs encoding by software, it takes time depending on the read image data.

In such a case, when the receiving side declares the minimum scanning line time capability in the memory reception as a time smaller than the capability of the transmitting side, the transmitting side cannot cope with this, and therefore, due to the convenience of the transmitting side, Excessive fill will be inserted than the minimum scan line time capability of one line declared in the memory reception on the receiving side. This will be described with reference to FIGS. 6 and 7.

FIG. 6 shows the structure of the image data of one line as the minimum scan line time of the transmission side when the minimum scan line time of the one line of the reception side is shorter than the minimum scan line time of the one line of the transmission side. FIG. 7 is a combined explanatory view, and FIG. 7 shows the structure of image data of one line when the minimum scan line time of one line on the receiving side is shorter than the minimum scan line time of one line on the transmitting side. It is an explanatory view according to the minimum scanning line time.

As shown in FIG. 6, when the minimum scan line time of one line on the receiving side is more effective than the minimum scan line time of one line on the transmitting side, it is usually declared on the receiving side. Since it does not have the ability to output in the minimum scan line time of one line,
Fill and EOL are added so as to match the minimum scan line time of one line on the transmission side in accordance with its own capability. That is, the fill of the dotted line portions of the A line and the B line shown in FIG. 6 becomes excessive.

Therefore, in order to improve the reliability in wireless communication, it is necessary to delete the fill of the dotted line portions of the A line and the B line shown in FIG. 6 to reduce the line error rate and output.

Therefore, it is necessary to add fill and EOL for the process of adjusting the minimum scanning line time of one line on the transmitting side shown in FIG. 7 to the minimum scanning line time of one line on the receiving side. The line data processing unit 10 performs the above-described processing for adjusting the minimum scanning line time of one line on the receiving side,
This is to convert to an appropriate amount of fill.

Next, the operation of the facsimile adapter of the first embodiment shown in FIG. 1 will be described.

At the initial stage of communication, the main control unit 8 which manages the overall control includes a line from the facsimile apparatus on the transmission side and the facsimile apparatus on the reception side from the wired facsimile protocol processing unit 1 and the wireless facsimile protocol processing unit 3. Has received a minimum scanline time declaration.

The image data output from the wired facsimile device is received by the image data transfer / fill deletion unit 2 via the wired facsimile protocol processing unit 1. Then, the image data processed by the image data transfer / fill deletion unit 2 is transferred to the wireless facsimile protocol processing unit 3
Transfer to

At this time, the fill detecting section 4 for detecting the fill added to the image data examines the image data transferred from the wired facsimile protocol processing section 1 and detects the fill existing therein. The image data for one line is shown in Fig. 3.
Because of the configuration shown in, the number of consecutive "0" is counted and 1
When one "0" is detected, the EOL detection unit 5 also detects the EOL at the end of the one line together with the subsequent "1".

In the fill detector 4, the "0" between the 11 "0" s and the subsequent "1" s are regarded as fills. The fill detector 4 indicates that the fill is being detected by EOL.
This is notified to the detection unit 5 and the transfer output control unit 7.

The EOL detection section 5 detects "1" for the first time during the fill detection and sets it as EOL detection, and notifies the 1-line data counter section 6 of this. The 1-line data counter unit 6 counts the amount of data between EOLs as the image data transfer / fill deletion unit 2 transfers. 1
When the line data counter unit 6 counts the data amount corresponding to the minimum scanning line time, it notifies the transfer output control unit 7 of this. The transfer output control unit 7 fills the image data transfer / fill deletion unit 2 under the condition that the fill detection unit 4 is detecting the fill and the transfer amount of the data amount for the minimum scanning line time of the 1-line data counter unit 6 has been counted. Delete instructions are given to remove excess fill.

Therefore, as shown in FIG. 6, when the minimum scan line time of one line on the receiving side is shorter than the minimum scan line time of one line on the transmitting side, the structure of the image data of one line is transmitted. The image data matched to the minimum scanning line time on the receiving side is changed to the image data matched to the minimum scanning line time on the receiving side shown in FIG. 7, and the line error rate becomes low even in a region susceptible to noise by radio. .

In the second embodiment, a one-line data counter section 6 for counting the data of one line in the first embodiment is used.
Since the 1-line data time measuring unit 60 that measures the conveying speed of 1-line data is used, the time-measuring operation of 1-line data can be regarded as the time of 1 line to be sent. EO detected in 5
The time between L and EOL may be measured.

As described above, the facsimile adapter of the embodiment shown in FIG. 1 is arranged between the wired facsimile device and the wireless device to perform protocol conversion. In the facsimile adapter, image data is transmitted from the wired facsimile device. A wired facsimile protocol processing unit 1 for receiving, a wireless facsimile protocol processing unit 3 for transmitting image data to a facsimile apparatus on the receiver side via the wireless device, and an output from the wired facsimile protocol processing unit 1 A fill detection unit 4 that detects fill data added to the transmission image data, an EOL detection unit 5 that detects the end of one line of the transmission image data, and one line that counts one line of the transmission image data. Data of one line is transferred via the data counter unit 6 and the wireless device. Transmission output control unit 7 for instructing the output
And the transmission image data from the wired facsimile protocol processing unit 1 to the wireless facsimile protocol processing unit 3
And an image data transfer / fill deletion unit (2) that deletes excess fill data in accordance with an instruction from the transfer output control unit (7) at the same time when the image data is transferred to the image data transfer / fill deletion unit.
Can be used as an example.

Therefore, in the facsimile adapter which is interposed between the wired facsimile device and the wireless device and performs the protocol conversion, the wired facsimile device on the transmitting side can display an image with the minimum scanning line time capability declared by the facsimile device on the receiving side. When you cannot send data,
Excessive fill data added over the minimum scanning line time declared by the sending side wired facsimile device can be removed to obtain image data of the minimum scanning line time declared by the receiving facsimile device, which is redundant. By removing the excess fill data that has been added over the minimum scanning line time declared by the wired facsimile machine on the transmitting side, and by making it the image data of the minimum scanning line time declared by the receiving facsimile machine, Unnecessary data is deleted, the amount of image data actually transmitted is reduced, and the error rate is reduced. As a result, it is possible to improve the received image quality, shorten the communication time, and reduce the communication cost.

Further, the facsimile adapter of the embodiment shown in FIG. 2 is interposed between a wired facsimile device and a wireless device, and is a facsimile adapter which performs protocol conversion and receives image data from the wired facsimile device. A wired facsimile protocol processing unit 1,
A wireless facsimile protocol processing section 3 for transmitting image data to a facsimile apparatus on the receiver side via the wireless apparatus, and a fill data added to the transmission image data output from the wired facsimile protocol processing section 1 are detected. A fill detection unit 4, an EOL detection unit 5 that detects the end of one line of the transmission image data, a 1-line data time measurement unit 60 that measures the transport time of the 1-line data of the transmission image data, and the wireless device. A transfer output control unit 7 for instructing transfer output of one line of data via
The transmission image data is transferred from the wired facsimile protocol processing unit 1 to the wireless facsimile protocol processing unit 3 and, at the same time, an excessive fill is transferred to the transfer output control unit 7.
The image data transfer / fill deletion unit 2 for deleting the image data according to the instruction of 1. is provided, and this can be an embodiment of claim 3.

Therefore, as in the first embodiment, in the facsimile adapter which is interposed between the wired facsimile apparatus and the wireless apparatus to perform protocol conversion, the wired facsimile apparatus on the transmitting side declares the facsimile apparatus on the receiving side. When the image data cannot be transmitted with the minimum scanning line time capability, the excess facsimile data added for the minimum scanning line time declared by the wired facsimile machine on the transmitting side is removed, and the facsimile machine on the receiving side is removed. Image data of the minimum scanning line time that is declared by, and redundant fill data that has been added over the minimum scanning line time declared by the wired facsimile machine on the transmitting side with redundancy is removed, and the receiving side By using the image data of the minimum scanning line time declared by the facsimile machine, unnecessary data is deleted, Image data amount is reduced to be sent in, the error rate is reduced. As a result, it is possible to improve the received image quality, shorten the communication time, and reduce the communication cost.

As a result, the facsimile adapter of each of the above-mentioned embodiments is interposed between the wired facsimile device and the wireless device to perform protocol conversion. In the facsimile adapter, the wired facsimile device on the transmitting side is the facsimile device on the receiving side. When image data cannot be transmitted with the minimum scan line time capability declared by the device, the excess fill data added for more than the minimum scan line time declared by the sending wired facsimile device is removed and received. Any image data of the minimum scanning line time declared by the facsimile machine on the side may be used.

At this time, excess fill data added for more than the minimum scanning line time declared by the redundant wired facsimile machine on the transmitting side is removed, and the minimum scanning line time declared by the receiving facsimile machine is removed. By using image data, unnecessary data is deleted, the amount of image data actually transmitted is reduced, and the error rate is reduced. As a result, it is possible to improve the received image quality, shorten the communication time, and reduce the communication cost.

[0041]

As described above, in the facsimile adapter according to the first aspect of the present invention, in the facsimile adapter which is interposed between the wired facsimile apparatus and the wireless apparatus and performs protocol conversion, the wired facsimile apparatus on the transmitting side receives the data. When the image data cannot be transmitted with the minimum scanning line time capability declared by the side facsimile device, the excess fill data added over the minimum scanning line time declared by the wired facsimile device on the transmitting side is removed. Since the image data is the image data of the minimum scanning line time declared by the receiving side facsimile machine, the redundant wired side facsimile machine is added more than the minimum scanning line time declared by the receiving side facsimile machine. Image of the minimum scan line time declared by the receiving facsimile machine after removing the excess fill data With over data, unnecessary data is deleted, actually the image data amount is reduced to be transmitted, the error rate is reduced. As a result, it is possible to improve the received image quality, shorten the communication time, and reduce the communication cost.

A facsimile adapter according to a second aspect of the present invention is a wireless facsimile protocol for transmitting image data to a facsimile apparatus on the receiver side via a wired facsimile protocol processing section for receiving image data from a wired facsimile apparatus and the wireless apparatus. The transmission image data is transferred from the wired facsimile protocol processing unit to the wireless facsimile protocol processing unit with the processing unit, and at the same time, the fill data and the EO are detected by the fill detection unit and the EOL detection unit.
When L is grasped, the 1-line data counter section counts 1-line data, and the transfer output control section instructs the transfer output of 1-line data. Since the excess fill data added over the minimum scanning line time declared by the wired facsimile machine is removed to make it the image data of the minimum scanning line time declared by the receiving facsimile machine, the image data is made compact. Unnecessary data is deleted, the amount of image data actually transmitted is reduced, and the error rate is reduced. As a result, it is possible to improve the received image quality, shorten the communication time, and reduce the communication cost.

According to a third aspect of the present invention, the one-line data counter section that counts one line of data according to the second aspect is a one-line data time measuring section that measures the carrying time of one-line data. Since the time measuring operation of is measured as the time of one line to be transmitted, the minimum scanning line declared by the wired facsimile machine on the receiving side is the same as the effect of claim 2. Excessive fill data added for more than the time is removed, and it is made the image data of the minimum scanning line time declared by the receiving side facsimile machine to make the image data compact, so unnecessary data is deleted and actually sent The amount of image data to be recorded is reduced and the error rate is reduced. As a result, it is possible to improve the received image quality, shorten the communication time, and reduce the communication cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a facsimile adapter according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an overall configuration of a facsimile adapter according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a configuration of image data for one line.

FIG. 4 is an explanatory diagram in which a configuration of image data of one line is represented by a scanning line time.

FIG. 5 is an explanatory diagram in which the configuration of image data for one line is adjusted as the minimum scanning line time for one line.

FIG. 6 shows the minimum scan line time of the transmission side when the minimum scan line time of the reception side is shorter than the minimum scan line time of the transmission side of one line. FIG.

FIG. 7 shows the minimum scan line time on the receiving side when the minimum scan line time on the receiving side is shorter than the minimum scan line time on the transmitting side. FIG.

[Explanation of symbols]

 1 Wired Facsimile Protocol Processing Unit 2 Image Data Transfer / Fill Deletion Unit 3 Wireless Facsimile Protocol Processing Unit 4 Fill Detection Unit 5 EOL (End of Line) Detection Unit 6 1 Line Data Counter Unit 7 Transfer Output Control Unit 8 Main Control Unit 10 line data processing unit 60 1 line data time measuring unit

Claims (3)

[Claims] 1. A facsimile adapter, which is interposed between a wired facsimile device and a wireless device and performs protocol conversion, in which the wired facsimile device on the transmitting side is capable of displaying an image with the minimum scanning line time capability declared by the facsimile device on the receiving side. When the data cannot be transmitted, the wired facsimile machine on the transmitting side removes the excess fill data added to the declared minimum scanning line time or more, and the receiving side facsimile machine determines the minimum scanning line time. A facsimile adapter characterized by being image data. 2. A facsimile adapter, which is interposed between a wired facsimile device and a wireless device and performs protocol conversion, comprises a wired facsimile protocol processing unit for receiving image data from the wired facsimile device, and a wireless device via the wireless device. Wireless facsimile protocol processing unit that transmits image data to a facsimile device on the receiver side, a fill detection unit that detects fill data added to the transmission image data output from the wired facsimile protocol processing unit, and the transmission EOL that detects the end of one line of image data
(End of Line) detection section, 1-line data counter section for counting 1-line data of the transmission image data, and transfer output control section for instructing transfer output of 1-line data via the wireless device An image data transfer / fill deletion unit that transfers the transmission image data from the wired facsimile protocol processing unit to the wireless facsimile protocol processing unit and at the same time deletes excess fill data according to an instruction from the transfer output control unit. Facsimile adapter characterized by the above. 3. A facsimile adapter, which is interposed between a wired facsimile device and a wireless device and performs protocol conversion, comprises a wired facsimile protocol processing section for receiving image data from the wired facsimile device, and a wireless device via the wireless device. Wireless facsimile protocol processing unit for transmitting image data to a facsimile apparatus on the receiver side, a fill detection unit for detecting fill data added to the transmission image data output from the wired facsimile protocol processing unit, and the transmission EOL that detects the end of one line of image data
(End of Line) detecting section, 1-line data time measuring section for measuring the carrying time of 1-line data of the transmission image data, and transfer output control for instructing transfer output of 1-line data via the wireless device And an image data transfer / fill deletion unit that transfers the transmission image data from the wired facsimile protocol processing unit to the wireless facsimile protocol processing unit and at the same time deletes excess fill data according to an instruction from the transfer output control unit. A facsimile adapter characterized by being provided.