JPS6066571A - Facsimile communication system - Google Patents

Abstract

PURPOSE:To shorten time for recording in receiving side when transmitting an original for which faithful reproduction is not required by scanning in a standard picture quality mode in transmitting side when on the transmitting side a prescribed switch is turned on, and at the same time, transmitting information that indicate a high picture quality mode to the receiving side. CONSTITUTION:When a special sending button in an operating section 15 is turned on in a transmitting station 10, this is detected by a controlling section 1 and a flag for special sending is made ''1'' and stored in a memory. In transmitting, the controlling section 14, on detecting ''1'' of above-mentioned flag, transmits information indicating that the transmitting station 10 is high picture quality mode to receiving side 20. On the other hand, the controlling section 14 designates standard picture quality mode to an original reading section 11, and transmits standard picture quality mode picture information. Consequently, recorded picture is reduced to a half in the direction of subscanning. However, the number of scanning lines at the time of recording becomes a half and time for recording in the receiving side is cut by half.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile communication system, and particularly to a system suitable for use in facsimile communication for originals that do not require faithful reproduction of original images.

[Prior art]

In general, facsimile machines have a standard-quality mode and a high-quality mode in which the sub-scanning line density is dense in order to transmit fine images, and the operator can arbitrarily select either of the two modes according to his/her wishes. I can do it.

The sub-scanning line density is, for example, 7.7 lines/line in high image quality mode, and 3.85 lines/line in standard image quality mode. When communicating in the high image quality mode, reading and recording scans of the original are performed at the sub-scanning line density of 7.7 lines/ayu. On the other hand, when communicating in standard-definition mode, scanning of the original is performed at a sub-scanning line density of 7.7 lines/line, as in the high-definition mode, but when transmitting this, the sending side The image information of the document read at the sub-scanning line density of the original is divided into groups of 2 main scanning lines, and the image information of these 2 main scanning lines is logically summed for each dot, resulting in 3.85 lines/tomo. It is transmitted to the receiving side as image information. As a result, the number of scans is reduced to 1/2 that of the high image quality mode, and the transmission time can be halved. On the receiving side, which has received the image information of 3.85 lines/fin, the image information for each main scanning line is divided into 2 main scanning lines at a sub-scanning line density of 7.7 lines/fin as in the high image quality mode. The image information is recorded by recording the image information. That is, the number of scanning lines is the same during recording on the receiving side in both the high-quality mode and the standard-quality mode. Therefore, there is no difference in recording time between the two modes.

By the way, conventionally, when transmitting a document with large strokes or a document that does not require faithful reproducibility, communication was usually carried out using the standard definition mode, but in this standard definition mode, Compared to the high-quality mode, the transmission time was halved, but no change was observed in the recording time.

[Purpose of the invention]

This invention has been made in view of the above-mentioned circumstances, and provides a facsimile communication system that can halve the recording time on the receiving side when transmitting a document that does not require faithful reproduction of the document image by facsimile. The purpose is to

[Structure of the invention]

In this invention, for example, when a predetermined switch is turned on on the transmitting side, the transmitting side reads and scans the document in standard image quality mode, and also sends information to the receiving side indicating that the transmitting side is in high image quality mode. The transmission causes the receiving side to perform recording scanning in the high image quality mode.

' As a result, although the sending side scans the document in standard quality mode, the recording operation on the receiving side uses the sub-scanning line density of high quality mode and the same scanning line is recorded only once. Although the recorded image is reduced by half in the sub-scanning direction, the number of recording scanning lines is half that of recording in standard image quality mode, and the recording time can be halved.

[Embodiments] Hereinafter, a facsimile communication system according to the present invention will be described in detail according to embodiments shown in the accompanying drawings.

FIG. 1 shows a schematic example of implementing the present invention.

In FIG. 1, a transmitting station 10 and a receiving station 20 are connected via a communication line 1. In FIG.

In the transmitting station 10, the document reading section 11 is composed of, for example, an image sensor and a sensor driver that drives and controls the image sensor, and reads an image of a transmitted document. Here, the document reading section 11 operates in a high image quality mode (7.7 lines/gate in the sub-scanning direction) and a standard image quality mode (3.7 lines/gate in the sub-scanning direction).
Images of originals can be read at two scanning line densities: 85 lines/πn), and normally, in the above standard mode, the image information read in the above high image quality mode is the logical sum of each dot for the 2 main scanning lines. The captured information constitutes image information for one main scanning line. The image information of the original read by the original reading section 11 is input to the encoding section 12, and the encoding section 12 transmits it to the communication line 5 via the modified Huffman type adjustment section 13. The control unit 14 controls the above-mentioned components based on operator commands input from the operation unit 15 and manages the operation sequence. ) has a memory that stores the input information.

Next, the receiving station 20 is a general facsimile machine 1a.

Similarly, it is equipped with a network control/modulation/demodulation section 21, a decoding section 22, a recording section 23, and a control section 24 that controls the operation of each of these components, but! The recording section 23 records high image quality based on the information transmitted from the transmitting side.Next, the special transmission operation according to the present invention will be explained according to the flowchart shown in FIG.

The steps will be explained in the order of step numbers shown in FIG.

For example, when transmitting an original (1, 1) by facsimile, which does not require faithful reproduction of the original image as shown in FIG. 21 (see figure 71") fPN user 8 <Steps 100, 110.> The control unit 14 of the sending side 10 searches for the activation of the special transmission button, and when it detects activation of the special transmission button, sets the special transmission flag. Stored in memory as logical value "1".

<Steps 120 and 130> After that, the control unit 14 searches for the input of a send button (not shown) to instruct the start of facsimile transmission, and when it detects the input of the send button, the control unit 14 stores the information in the memory. A search is made to see if the special transmission flag set is "1pa".

<Step 140> If the special transmission flag is not 1'', that is, it is 0'', based on pressing another button, for example, the partners of the transmitting station 10 and the receiving station 20 perform normal reading and recording in high-quality mode, etc. Execute facsimile communication in transmission mode.

<Steps 150, 160> If the special transmission flag is 1'', the control unit 14 controls the line with the receiving side and then informs the receiving side 20 through the protocol that the transmitting station 10 is in high-quality mode. Information indicating this will be transmitted in the winter.

<Steps 170, 180, 190> On the other hand, the control unit 14 performs control to perform MC capture of the original in the standard definition mode, so that the image information read in the standard definition mode is transferred to the control unit 14. is transmitted to the receiving side.

By performing such control, image information of 3.85 lines/mm is transmitted from the sending side 10 to the receiving side 1+g2o, but the receiving side 20 transmits the image ↑-IY information to the high quality mode Recording is performed at a sub-scanning density of 7.7 lines/.

In other words, when recording in conventional standard quality mode, the same
The scanning line was recorded twice each time, but according to the method of the present invention, the same scanning line is recorded only once each time, so the recorded image is recorded in the sub-scanning direction as shown in Fig. 3 (1)). Although the size is reduced by half in terms of direction, the number of scanning lines during recording is half that of the conventional method.

As a result, the recording time on the receiving side is changed.1 The above-described functions of the present invention can be realized by simply changing the control program in the control section 14. In addition to the high-definition and standard-definition modes, the present invention also has a high-speed mode that can further reduce transmission time.
Of course, it can also be applied to facsimile systems.

〔Effect of the invention〕

As explained above, according to the facsimile communication system according to the present invention, even when faithful reproduction of the original image is not required, the operator can significantly reduce the recording time on the receiving side by simply turning on a switch as appropriate. This makes it possible to realize highly efficient facsimile communication.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the configuration of a facsimile system to which the present invention is applied, FIG. 2 is a flowchart showing an example of the operation of the present invention, and FIG. 3 is an example of correspondence between a document image and a recorded image according to the present invention. It is a diagram. 10 Transmitting station, 11... Original reading unit, 12... Encoding unit, 13.21... Network control/modulation/demodulation unit, 14.24...
- Control unit, 15... Operating unit, 20-Receiving station, 22-Decoding unit, 23... Recording unit. Figure 2 Figure 3 (G) (b)

Claims (1)

[Claims] In a facsimile communication system that has two different scanning line densities, coarse and fine, in the sub-scanning direction and reads or records a document in either a first or second mode corresponding to the scanning line density, The side reads and scans the original in the first mode, and transmits information indicating that the second mode is in the receiving side to the receiving side,
A facsimile communication system characterized in that recording scanning is performed in the second mode on the receiving side.