JPH0622112A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To attain excellent communication independently of a line state by allowing a receiver side to instruct a proper transmission level to a sender side based on the result of measurement of an input level from a sender side. CONSTITUTION:An incoming call signal measurement section 16 measures a procedure signal level from a sender side, signal transmission level command information is read from a table of a ROM in a control section 11 by using the level for address information and the information is sent to a sender side facsimile equipment via a MODEM 14 and an NCU 15. The sender side sends information with a proper signal level in response to the command information. Thus, excellent communication corresponding to the line state is implemented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine capable of maintaining a suitable signal level when receiving a document.

[0002]

2. Description of the Related Art In a facsimile apparatus, an image signal of an original is sent to a line on the transmitting side and the receiving side receives the image signal to record an image. Conventionally, the level of the image signal transmitted to the line has been fixedly set by the facsimile apparatus on the transmission side.

[0003]

As described above, the level of the image signal transmitted through the line is set on the transmitting side, and the sending level is fixed. That is, conventionally, it was not premised that the operator on the transmitting side adjusts the level according to the situation.

Therefore, in the case where the signal loss in the line connecting the transmitting side facsimile apparatus and the receiving side facsimile apparatus is larger than the average, the signal is often attenuated until reaching the receiving side. , There was a problem that the receiving side could not receive the image signal and the control signal normally. On the other hand, if the signal loss on the line is smaller than the average one, an excessive level of signal will arrive at the receiving side, which will distort the signal and allow normal communication. There was a problem of disappearing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile apparatus capable of performing good communication between a transmitting side and a receiving side regardless of loss of a line or a transmission line.

[0006]

According to a first aspect of the invention, there is provided a receiving means for receiving a signal sent from the transmitting side, a recording section for recording an image based on the received signal, and a transmitting side. The facsimile apparatus is provided with a level measuring section for measuring the level of the signal sent from the facsimile machine and an instructing means for instructing the transmitting side of an appropriate signal transmission level of the transmitting side based on the measured level.

That is, according to the first aspect of the present invention, the level of the signal sent from the transmitting side is measured at the receiving side of the facsimile machine, and if it is larger or smaller than the average level, the transmitting side The above-mentioned object is achieved by instructing the transmitting side of an appropriate signal transmission level.

According to the second aspect of the present invention, the level of the procedure signal sent from the transmitting side is measured prior to the transmission of the image, and the optimum signal sending level is sent to the sending side based on this by sending the procedure signal. I'm going to tell you.

[0009]

EXAMPLES The present invention will be described in detail below with reference to examples.

FIG. 1 shows the configuration of a facsimile apparatus according to an embodiment of the present invention. The facsimile apparatus according to the present embodiment includes a control unit 11 including a CPU (central processing unit), a ROM (read only memory) for controlling the CPU, a working memory, and the like. The control unit 11 is connected to the reading unit 12, the recording unit 13, the modem unit 14, the NCU 15 and the incoming signal measuring unit 16 via an I / O port (not shown).

Here, the reading section 12 is equipped with, for example, a one-dimensional image sensor, and is adapted to read an image on a document. The recording unit 13 prints the received image on, for example, thermosensitive coloring paper. The modem unit 14 has a role of performing modulation for transmitting the image signal to another facsimile device (not particularly shown because it has the same configuration) via a line not shown, and, on the contrary, has a role of receiving the image signal and demodulating it. . The NCU 15 controls the line. The incoming signal measuring unit 16 is for measuring the level value of the incoming signal sent from the transmitting side facsimile apparatus, and is unique to the present invention.

In the facsimile device having such a configuration, the incoming signal measuring section 16 measures the incoming level of the procedure signal sent from the transmitting side. Then, using the incoming call level as address information, the sending side signal sending level instruction information for instructing the increase or decrease of the sending side signal sending level is read from the table in the ROM. Then, this is sent to the facsimile machine on the sending side so that the level of the signal sent from now on becomes an appropriate value.

FIG. 2 shows a procedure performed by the facsimile apparatus on the receiving side for this purpose. In the facsimile machine on the receiving side, the CPU monitors the arrival of the procedure signal (step S101). When the procedure signal is received (Y), the incoming signal measuring unit 16 measures the signal level (step S102). ). And, as mentioned above, RO
The transmission level instruction information is read from the M table (step S103), incorporated in the procedure signal (NSF) of the reception side and transmitted to the transmission side (step S104).

Depending on the device, the incoming signal measuring unit 16
The sending level instruction information to be sent may be calculated from the result measured in step 1, or the measured result may be sent to the sending side as it is as a numerical value.

FIG. 3 shows the exchange of such procedure signals between the transmitting side and the receiving side. First, the transmitting side sends the procedure signal 21 to the receiving side before transmitting the image, and the receiving side disguises the procedure signal 22 described in step S104 to the transmitting side.

FIG. 4 shows the flow of control on the transmitting side that receives the procedure signal. When the procedure side signal 22 is received by the facsimile apparatus on the transmitting side (step S20)
1; Y), this is decoded (step S202), and the transmission level of the signal to the receiving side is adjusted (step S20).
3). As a result, the receiving side can receive the control signal and the image information at the optimum signal level.

[0017]

As described above, according to the present invention, the receiving side measures the signal level of the incoming signal and gives an instruction to change the level of the signal transmitted by the transmitting side to an appropriate level. The advantage is that good communication can be performed regardless of the line status. In addition, the receiving side can also send a signal at an appropriate signal level to the transmitting side in relation to the measured signal level, and communication between the transmitting side and the receiving side can be favorably performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a main part of a control flow of a facsimile apparatus on the receiving side in the present embodiment.

FIG. 3 is a procedure explanatory view showing how the transmitting and receiving procedure signals are transmitted and received in the present embodiment.

FIG. 4 is a flowchart showing a main part of a control flow of the facsimile apparatus on the transmission side in the present embodiment.

[Explanation of symbols]

 11 Control Section 13 Recording Section 14 Modem 15 NCU 16 Incoming Signal Measuring Section 21 (Transmission Side) Procedure Signal 22 (Reception Side) Procedure Signal

Claims (2)

[Claims] 1. A receiving means for receiving a signal sent from a transmitting side, a recording section for recording an image based on the received signal, and a level for measuring the level of the signal sent from the transmitting side. A facsimile apparatus comprising: a measuring section; and an instructing means for instructing the transmitting side an appropriate signal transmission level on the transmitting side based on the measured level. 2. The method is characterized in that the level of a procedure signal sent from the transmitting side is measured prior to the transmission of an image, and the optimum signal sending level is instructed to the sending side based on the measured level. The facsimile apparatus according to claim 1,