JPS60109366A - Communication terminal device - Google Patents

Abstract

PURPOSE:To increase extremely the transmission speed by storing the picture information to be transmitted to a picture memory after processing it and at the same time transmitting the stored information directly to a terminal device at the remote side. CONSTITUTION:The output of a keyboard 2 is applied directly to a communication control part 5. The part 5 refers to an address number to search a terminal function memory 4 and reads out the function of the corresponding terminal device at the remote side. Then the part 5 sets an action mode of a picture processing part 3 based on said read-out function. When a scanner 1 is actuated by the part 5, the output data of the scanner 1 are synthesized with the data of a character generator through a synthesizing part. This synthetic data undergoes variation of opicture element density at a picture element density conversion part and then the picture processing through a binary coded picture data compressing part such as the binary coding process and the data compressing process. Then the processed data is stored to the memory 4.

Description

[Detailed description of the invention] [Technical field] The present invention relates to a communication terminal device equipped with an image memory.

[Prior Art] Generally, image information has a very large amount of data and a high degree of redundancy, so communication terminal devices that transmit image information, such as facsimile machines, encode the image information and compress the data to shorten the transmission time. are doing. As the code compression method, a plurality of optimal methods that can compress image information most efficiently have been proposed.

Furthermore, in recent years, in addition to the resolution of 8 (dots/no), terminal devices with a high resolution of 16 (dots/l111) have been put into practical use.

By the way, when transmitting image information, if inter-memory communication is performed in which the image information is stored in the image memory and then transmitted to the image memory of the other party's terminal device, the transmission speed can be significantly improved. Furthermore, if the image information is encoded and compressed when stored in the image memory, the size of the image memory can be significantly reduced.

At this time, if the image processing function such as code compression of the own terminal device is the same as that of the other terminal device, the data read from the image memory can be directly output to the modem, so there is no need to perform code processing etc. during actual transmission. , it becomes possible to further increase the transmission speed of the modem.

However, as described above, since the image processing functions of communication terminal devices are diversifying, the image processing functions of the other party's terminal device and the own terminal device are not necessarily the same.

Therefore, when communicating with the other party's terminal device, the functions of the other party's terminal device are known, the encoded compressed data stored in the image memory is returned to the original image information, and image processing such as code compression is performed using a method suitable for the other party's terminal device. It is necessary to do
As a result, the advantages of inter-memory communication as described above cannot be obtained.

[Objective] The present invention has been made in order to eliminate the drawbacks of the prior art as described above, and an object of the present invention is to provide a communication terminal device that can effectively perform inter-memory communication.

[Configuration] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a facsimile machine according to an embodiment of the present invention. This facsimile machine is a group 4 class 3 machine equipped with a mixed mode that transmits both image information and character information, with the addition of functions for transmitting halftone images and color images.

In the same figure, 1 is an image of 16 x 16 (dots/lI
2 is a keyboard for inputting character information and inputting various command signals to this device, and the output of scanner 1 and keyboard 2 is is image processing section 3
added to.

The image processing section 3 performs various types of image processing on the multivalued signal applied from the scanner 1 and the character information applied from the keyboard 2, the details of which are shown in FIG.

That is, the image processing unit 3 processes character information from the keyboard 2 in order to cope with the case where the other terminal device (the path shown) is a terminal that cannot receive mixed mode information (for example, a class 1 machine in group 4). (code information) to 1
It is equipped with a character generator 301 for converting into a 6×16 (dot/+nn) image, and a synthesizing section 302 for synthesizing the output data of this character generator 301 and the output data of the scanner 1, so that the resolution of the partner terminal device is 8×8. (dot/nwu) (for example, one class machine with only standard functions),
A pixel density conversion unit 303 that converts the pixel density to 172 is provided.

Also, in order to match the type of document and the image transmission mode of the destination terminal device, a binary image data compression unit 304 converts image information, which is a multilevel signal, into binary image information and compresses the data using a predetermined method. , a halftone image data compression unit 305 that converts image information into halftone image information and compresses the data using a predetermined method; and a halftone image data compression unit 305 that converts image information into halftone image information and compresses the data using a predetermined method. The color image data compression unit 306 has a color image data compression unit 306, and the outputs of these units are exclusively selected by a switch 307. Note that the halftone image data compression section 305 includes the functions of the binary image data compression section 304, and the color image data compression section 30.
6 includes the functions of a binary image data compression section 304 and a halftone image data compression section 305.

308 is a switch for selecting the output of the character generator 301, 309 is a switch for selecting the output of the pixel density converter 303, and 310 is a switch for selecting whether or not to output the output of the keyboard 2 to the next stage. , this switch 310 is operated inversely to switch 308.

Note that the character generator 301, the synthesis section 302,
Pixel density conversion unit 303. Binarized image data compression unit 304
, halftone image data compression section 305 and color.

Since the image data compression unit 306 is an element based on a well-known technology, a detailed explanation thereof will be omitted.

Such output data from the image processing section 3 is stored in the image information memory 4, and the output from the keyboard 2 is also directly applied to the communication control section 5.

The communication control section 5 exchanges data with the other terminal device according to the protocols of each layer set for the group of four machines, selects each function of the image processing section 3 described above, and also performs the function selection for the image information memory 4. Controls reading and writing of image information and controls the scanner I.

Further, 6 is a terminal function memory storing image processing functions and transmission functions for a large number of partner terminal devices, and 7 is a well-known network control unit (NCU) capable of automatic transmission and reception.

With the above configuration, storage of image information to be transmitted to a partner terminal device is performed according to the flowchart shown in FIG.

The operator places the original on scanner 1 and presses keyboard 2.
When the telephone number (destination number) of the other party's terminal device is input (manual operations 11 and 12), the output from the keyboard 2 is directly applied to the communication control unit 5 since the switch 310 is on at this time.

The communication control unit 5 refers to the destination number and stores it in the terminal function memory 6.
and read out the functions of the corresponding terminal device (
Processing 13). If the partner terminal device at this time is registered in the terminal function memory 6, that is, if the function can be read out by process 13 and the search is successful,
The result of judgment 14 is YES, and communication control section 5 sets the operation mode of image processing section 3 based on this read function (process 15).

For example, if the function of the other party's terminal device is that the pixel density is 8 x 8 (dots/nxn), it can only record binary images, and
If you do not have mixed mode, switch 3
08 is turned on, switch 310 is turned off, and switch 30 is turned on.
9 selects the image density converter 303, and switch 307 selects the binarized image data compressor 304.

When the communication control section 5 operates the scanner 1, the output data is synthesized with the data of the character generator 301 in the synthesis section 302, the pixel density is changed in the pixel density conversion section 303, and then the output data is converted into binary image data. Compression section 30
In step 4, image processing including binarization processing and data compression processing is performed (processing 16), and the image-processed information is stored in the image information memory 4 (processing 17).

By the way, if the function of the other party's terminal device is not stored in the terminal function memory 6, the function cannot be read out by process 13, so the result of determination 14 is NO.

Therefore, the communication control unit 5 once calls and communicates with the other party's terminal device (process 21), detects the image processing function and transmission function of the other party's terminal device (process 22), and transfers the detected function to the destination number of the other party's terminal device. After storing it in the terminal function memory 6 in association with (process 23), the process proceeds to process 15, where the operation mode of the image processing section 3 is set.

In addition, the transmission signal for the group 4 machines uses a signal in the same format as the high-level data link procedure control, and the transport layer protocol TP is CCITT (International Telegraph and Telephone Consultative Committee) Recommendation 5.70, and the session layer protocol 1 is used.
- CCITT Recommendation 3.62 is to be used as the Col CP.

Therefore, transmission control with the partner terminal device is performed in accordance with the procedure shown in FIG.

First, a dial signal DT is output to the line network to call the other party's terminal device, and a transmission setting command SA13M is sent to the other party's terminal device.

In contrast, when the mode setting response UA is returned, the physical line has been established, so a transport connection request TCR is sent, and in response, a transport 1-connection acceptance TCA is sent back. Now that communication is possible, issue session start command C5.
Sends S.

In response to this session start command C5S, the partner terminal device returns a session start affirmative response R55P. Since this response It S S +) includes terminal function information as a parameter, the communication control unit 5 can separate this information and learn various functions of the other party's terminal device.

This communication has achieved its purpose so far.

A session end command C5E is sent. In response, when a session termination affirmative response RS Ig P is returned, a transmission termination response 1) Isc is sent.

In response, the mode setting response U from the other party's terminal device is
When A is returned, the line is physically disconnected, that is, put into an on-hook state, and the transmission operation ends.

In this way, since the image information is processed using the same image processing function as that of the other party's terminal device and then stored in the image information memory 6, inter-memory communication can be performed at high speed.

Note that if the partner terminal device is changed after data is stored in the image information memory 6, the functions of the partner terminal device are newly read out from the terminal function memory 6 and compared with the functions before the change. If they match, OK is displayed to the operator; if they do not match, NG is displayed and the operator is instructed to re-storage the IM document.

If the changed partner terminal device is not registered in the terminal function memory 6, the partner terminal device is contacted and its function is detected in the same manner as described above.

This is stored in the terminal function memory 6.

By the way, a pixel density conversion function for converting 16×16 (dots 8 l1l) into 12×12 (dots/screams) and 9°6×9.6 (dots 8 Iwn) may be added to the above-described embodiment. Also, the paper size is A4
．． Three types are available: B4 and A3.

Note that the present invention can also be applied to communication terminal devices other than Group 4 facsimile devices. Group 4 facsimile devices are being standardized by the CCITT, and are communication terminal devices capable of telematic services that include a mixture of graphical information and text information, and are classified into three classes.

[Effects] As explained above, according to the present invention, image information is stored in the image information memory after image processing is performed using the same function as that of the other party's terminal device, so the advantages of inter-memory communication can be effectively utilized. This has the advantage that the transmission speed can be significantly increased.

[Brief explanation of drawings]

FIG. 1 is a block diagram illustrating a facsimile apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram illustrating the image processing section in detail, and FIG. 3 is a flowchart illustrating the flow of control during image storage. FIG. 4 is a time chart illustrating the procedure at 4 o'clock. ■...Scanner, 2...Keyboard, 3...Image processing unit, 4...Image information memory, 5... communication control unit,
6... Terminal function memory, 7... Network control device, 301
...Character generator, 302...Composition section,
303... Pixel density conversion unit, 304... Binarized image data compression unit, 305... Halftone image data compression unit,
306...Color image data compression section, 307-310
···switch. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a communication terminal device equipped with an image memory for storing image information and an automatic transmission means for calling a designated destination terminal device, an image processing means having multiple image processing functions and the image processing function of the destination terminal device are detected. equipped with a detection means to
The image processing function of the other party's terminal device is set to the above-mentioned image processing means, and the image information to be transmitted is processed by this image processing means and then stored in the image memory, and this accumulated information is directly transmitted to the other party's terminal device. A communication terminal device characterized by: