JPH09181846A - Signal detector for facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate the class of a facsimile control signal by detecting the number of consecutive '1s' from a signal of a fully duplex modem. SOLUTION: A command decode section 21 starts the operation of a clock gate section 22 in response to a signal from a communication control section, the clock gate section 22 provides an output to '1' count section 23 by using a sampling serial clock SDCLK (that is obtained by using a system clock SCLK to sample a serial clock DCLK of a modem section and inverting the sampled clock) as a count clock and provides an output to the '1' count section 23 by latching '0' of at a RXD of the modem section at a leading edge of the sampling serial clock SDCLK as a reset signal RS. The '1' count section 23 counts count clocks between the reset signals RS and provides an output of number of consecutive '1s' to a tri-state buffer section 24, which provides an output of the count outputted from the '1' count section 23 to a communication control section via a data bus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal detection device for a facsimile machine, and more particularly to a signal detection device for a facsimile machine that appropriately determines a facsimile control signal transmitted and received by a modem that performs full-duplex communication.

[0002]

2. Description of the Related Art With the spread of facsimile machines, higher performance and higher speed have been sought. For example, voice communication / speech call disclosed in Japanese Patent Laid-Open No. 62-146056.
In the data communication switching system, a voice call and data communication are switched using a modem, and the data modulator / demodulator with a facsimile identification function described in Japanese Patent Laid-Open No. 4-115647 and a call signal detection circuit. Thirty
By controlling the switching circuit with each output of the 0bit / s modem and 2100Hz detection circuit as input,
II The telephone line is switched depending on whether it is a facsimile or a modem.

In the conventional facsimile apparatus, generally, a half-duplex type modem capable of transmitting data from only one side at a time is used, and a half-duplex type modem is used. In this case, the facsimile control signal or the like from the other party can be properly discriminated, the facsimile control procedure can be executed, and the line switching processing described in the above publication can be appropriately performed.

[0004]

However, since the conventional facsimile apparatus generally uses a half-duplex mode modem, the facsimile control signal or the like transmitted from the other party is appropriately discriminated and the facsimile is transmitted. Although it was possible to execute control procedures and perform switching processing of various lines, there has recently been a demand for high-speed facsimile communication, and even modems can simultaneously transmit signals and data in both directions. It is desired to increase the communication speed by using a dual mode modem.

However, in facsimile communication,
It is known that the end of the facsimile control signal is indicated by adding a predetermined number of consecutive "1" s to the end of the signal. 34
Since the modem does not have a function of detecting the number of consecutive "1" s, when performing facsimile communication using a full-duplex modem, the "1" is controlled by the control unit of the facsimile apparatus. However, there is a problem that it takes a long processing time.

Therefore, according to the first aspect of the present invention, by counting the number of consecutive "1" s from the serial output data of the modem, the number of consecutive "1" s of the facsimile control signal is detected in real time, and all two digits are detected. An object of the present invention is to provide a signal detection device for a facsimile machine that enables high-speed facsimile communication using a heavy modem.

According to a second aspect of the present invention, the comparison reference value set as the continuous number of "1" suitable for determining the type of the facsimile control signal is "1" of the facsimile control signal.
It is an object of the present invention to provide a signal detection device for a facsimile device that can perform facsimile communication at a higher speed by detecting that the number of consecutive times has reached.

According to a third aspect of the present invention, a plurality of comparison reference values indicating a continuous number of "1" suitable for discriminating the type of the facsimile control signal are set by switching to set a plurality of facsimile control at high speed. It is an object of the present invention to provide a signal detection device for a facsimile machine capable of discriminating the type of signal.

According to a fourth aspect of the present invention, various facsimile control signals are detected at high speed by appropriately setting the number of consecutive "1" suitable for discriminating the type of the facsimile control signal as the comparison reference value. It is an object of the present invention to provide a signal detection device for a facsimile machine that can be used.

[0010]

According to a first aspect of the present invention, there is provided a signal detecting apparatus for a facsimile apparatus, which comprises a serial interface for transmitting / receiving a signal, and a modem for transmitting / receiving a signal in full duplex in at least a part thereof. A signal detecting device of a facsimile device for exchanging a predetermined facsimile control signal which is modulated and demodulated with a partner facsimile device to perform facsimile communication, which is connected to a serial interface of the modem and outputs serial data of the modem. Latching means for latching each of the timings, a resetting means for outputting a reset signal to the counting means when the serial data of the modem is "0", and a "1" based on the latching result of the latching means. While counting the number of consecutive, the reset signal output by the reset means Comprising a counting means for resetting Risono count value, and based on the count result of said counting means, by detecting the facsimile control signal, it has achieved the above objects.

In facsimile communication, the end of the facsimile control signal is indicated by adding a predetermined number of consecutive "1" signals to the end of the facsimile control signal. Heavy-duty modems, such as V.V. The 34 modem does not have a function of detecting the number of consecutive "1" s.

Therefore, the serial data output of the modem is latched at every predetermined timing to count the number of consecutive "1" s, and when the serial data is "0", the count value is reset to thereby cause the facsimile. The facsimile control signal is detected by detecting the number of consecutive "1" s in the control signal.

According to the above arrangement, the continuous number of "1" is counted from the serial output data of the modem without the intervention of the control means of the facsimile apparatus, so that the continuous number of "1" of the facsimile control signal is counted in real time. Therefore, the facsimile control signal can be detected appropriately and at high speed, and high-speed facsimile communication by the full-duplex modem can be performed.

According to a second aspect of the present invention, there is provided a signal detecting device for a facsimile machine, which is provided with a serial interface for transmitting and receiving signals, and at least a part of which is modulated and demodulated by a modem for transmitting and receiving signals in full duplex. A signal detecting device of a facsimile device for exchanging a facsimile control signal with a partner facsimile device to perform facsimile communication, which is connected to a serial interface of the modem and outputs serial data of the modem at a predetermined timing. Latch means for latching, reset means for outputting a reset signal to the counting means when the serial data of the modem is "0", and counting the continuous number of "1" based on the latch result of the latch means. , Its count by the reset signal output by the reset means And counting means for resetting,
Comparing the count value of the counting means with a predetermined comparison reference value, when the count value reaches the comparison reference value,
The comparison means for outputting a reaching signal is provided, and the above-mentioned object is achieved by detecting the facsimile control signal based on the reaching signal output by the comparing means.

Here, the comparison means has previously set the number of consecutive "1" suitable for discriminating the type of the facsimile control signal as the comparison reference value, and compares the comparison reference value with the count value. doing.

According to the above arrangement, the fact that the consecutive number of "1" of the facsimile control signal has reached the comparison reference value set as the consecutive number of "1" suitable for discriminating the type of the facsimile control signal. The facsimile control signal can be detected quickly, and the facsimile control signal can be detected at a higher speed. As a result, the facsimile communication can be performed more appropriately and at higher speed.

According to a third aspect of the present invention, there is provided a signal detecting device for a facsimile apparatus, which comprises a serial interface for transmitting and receiving signals, and at least a part of which is modulated and demodulated by a modem for transmitting and receiving signals in full duplex. A signal detecting device of a facsimile device for exchanging a facsimile control signal with a partner facsimile device to perform facsimile communication, which is connected to a serial interface of the modem and outputs serial data of the modem at a predetermined timing. Latch means for latching, reset means for outputting a reset signal to the counting means when the serial data of the modem is "0", and counting the continuous number of "1" based on the latch result of the latch means. , Its count by the reset signal output by the reset means And counting means for resetting,
A comparison that has a plurality of switchable comparison reference values, compares the count value of the counting means with one of the plurality of comparison reference values, and outputs an arrival signal when the count value reaches the comparison reference value. Means, and a designating means for designating one of a plurality of comparison reference values possessed by the comparing means, wherein the comparing means compares the comparison reference value designated by the designating means with the count value, and performs the comparison. The above object is achieved by detecting the facsimile control signal based on the arrival signal output by the means.

According to the above configuration, a plurality of comparison reference values indicating the continuous number of "1" suitable for discriminating the type of the facsimile control signal are set by switching, and the continuous "1" of the facsimile control signal is set. It is possible to quickly detect that the number has reached the comparison reference value, and it is possible to detect a plurality of facsimile control signals at a higher speed. As a result, the facsimile communication can be performed more appropriately and at higher speed.

According to a fourth aspect of the present invention, there is provided a signal detecting device for a facsimile apparatus, which comprises a serial interface for transmitting and receiving signals, and at least a part of which is modulated and demodulated by a modem which transmits and receives signals in full duplex. A signal detection device for a facsimile device that performs facsimile communication by exchanging a facsimile control signal with a partner facsimile device, which is connected to the serial interface of the modem and latches the serial data output of the modem at a predetermined timing. And a reset means for outputting a reset signal to the counting means when the serial data of the modem is "0", and counting the number of consecutive "1" s based on the latch result of the latch means, The count value by the reset signal output from the reset means Counting means for resetting, comparing the count value of the counting means with an input comparison reference value, and when the count value reaches the comparison reference value, a comparing means for outputting a reaching signal and a predetermined value for the comparing means. And a reference value setting means for outputting the comparison reference value of
The comparison means compares the count value with the comparison reference value input from the reference value setting means, and detects the facsimile control signal based on the arrival signal output from the comparison means. Has been achieved.

According to the above configuration, the continuous number of "1" suitable for determining the type of the facsimile control signal is set as the comparison reference value in accordance with the detected facsimile control signal, and the facsimile control signal is set. It is possible to quickly detect that the number of consecutive "1" s has reached the comparison reference value, and it is possible to detect various facsimile control signals at a higher speed. As a result, even faster
In addition, the facsimile communication can be appropriately performed.

[0021]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Since the embodiment described below is a preferred embodiment of the present invention, various technically preferable limitations are given, but the scope of the present invention is particularly limited in the following description. Unless specifically stated to limit the present invention, the present invention is not limited to these embodiments.

FIGS. 1 to 3 are diagrams showing a facsimile apparatus to which the first embodiment of the signal detecting apparatus of the facsimile apparatus of the present invention is applied.

FIG. 1 is a block diagram of a facsimile machine 1 to which a first embodiment of a signal detecting device for a facsimile machine of the present invention is applied, and this embodiment corresponds to claim 1. .

In FIG. 1, the facsimile apparatus 1 includes an image memory 2, a reading unit 3, a recording unit 4, a "1" detection unit 5, a modem unit 6, an NCU (network control) unit 7, an operation display unit 8 and a system. A memory 9, a system control unit 10, an encoding / decoding unit 11, a communication control unit 12, and the like are provided.
It is connected by a bus 13.

The image memory 2 is, for example, a large capacity RAM.
(Random Access Memory) or a hard disk device, etc., and mainly stores image data. The image data of the transmitted original document and the received image data are stored in the image memory 2, and the image data stored in the image memory 2 are read out at a predetermined time under the control of the system control unit 10 and transmitted. And used for recording processing.

The reading unit 3 is, for example, a CCD (Charge Cou
An image scanner or the like using a pled device) is used, and generally includes an ADF (automatic document feeder). Multiple documents are set in the ADF, and the AD
F feeds the set originals one by one to the original reading position of the reading unit 3.

The reading unit 3 scans the document conveyed from the ADF, reads the image information of the document at a predetermined resolution, and outputs the image information to the encoding / decoding unit 11 or the recording unit 4.

As the recording unit 4, for example, an electrophotographic recording device or the like is used, and the recording unit 4 is the system control unit 10.
Under the control of, the received image data and the image data read by the reading unit 3 are recorded on the recording paper.

The "1" detecting section 5 is connected to the serial interface of the modem section 6 and, as will be described later, counts the number of consecutive "1" s in the serial output of the modem section 6,
The count result is output to the communication control unit 12.

The modem unit 6 is a V. 34 modems are used and communicate at least in part full duplex. Modem section 6
Operates based on the system clock from the system control unit 10, modulates the transmission signal into a form suitable for transmission on the line L, and demodulates the modulation signal sent from the line L.

A line L (for example, a telephone line) is connected to the NCU unit 7, and the NCU unit 7 automatically receives a call from the line L and automatically calls the line L. I do.

The communication control section 7 includes a modem 6 and an NCU section 7.
Is connected to the system control unit 10 to control the modem unit 6 and the NCU unit 7, thereby exchanging a facsimile control signal with the partner facsimile apparatus and performing a facsimile communication procedure. Run.

The operation display section 8 is provided with various operation keys such as a numeric keypad, a start key, a stop key, and a function key, and a display (for example, a liquid crystal display), and various operation commands such as a transmission operation are provided by each operation key. Is input, and the contents of the command input from the operation keys and various information notified from the facsimile apparatus 1 to the operator are displayed on the display.

The system memory 9 is a ROM (Read Only).
Memory), RAM (Random Access Memory), etc., and stores the system program of the facsimile apparatus 1 and various data and system data necessary for executing the system program.

The system control unit 10 has a system memory 9
RA of the system memory 10 based on the program in the
Facsimile device 1 using M as work memory
And controls the respective units to execute the processing as the facsimile apparatus 1 and the recording color control processing described later.

The encoding / decoding unit 11 is intended to shorten the transmission time of image data, improve efficiency, and improve the efficiency of storage in the image memory 2, and encode image data according to a predetermined encoding method. Also, the encoded image data is decoded.

The "1" detecting section 5 is constructed as shown in FIG. 2, and comprises a command decoding section 21, a clock gate section 22, a "1" counting section 23, a 3-state buffer section 24 and the like. .

An address bus is connected to the command decoding unit 21, and a chip select signal, a write signal, and a read signal are input from the communication control unit 12, and the command decoding unit 21 controls communication via the address bus. The address input from the unit 12 is decoded and a start / stop signal for detecting "1" is output to the clock gate unit 22 and a read signal is output to the 3-state buffer unit 24.

In addition to the start / stop signal from the command decoding unit 21, the system clock SCLK as shown in FIG. 3 is input to the clock gate unit (latch means, reset means) 22 and the modem. The serial clock DCLK shown in FIG.
And the data RXD of the modem unit 6 is input.

As shown in FIG. 3, the clock gate unit 22 inverts a signal obtained by inverting the sampling serial clock SDCLK obtained by sampling the serial clock DCLK of the modem unit 6 with the system clock SCLK, and outputs the signal to the count clock CC of the "1" counting unit 23. The data RXD of "0" of the modem section 6 is latched at the rising edge of the sampling serial clock SDCLK and is output to the "1" counting section 23 as the reset signal RS.

"1" counting section (counting means) 23
Counts the count clock CC between the reset signals RS input from the clock gate unit 22 as a continuous number of “1” and outputs the count value CV to the 3-state buffer unit 24.

The 3-state buffer unit 24 is normally in a high impedance state, and when a read signal is input from the command decoding unit 21, it becomes a data output state,
The count value input from the “1” counting unit 23 is output to the data bus of the communication control unit 12.

Next, the operation of this embodiment will be described.

In the facsimile apparatus 1 of the present embodiment, the continuous control of "1" is detected at high speed from the facsimile control signal transmitted / received by the full-duplex modem section 6 without the intervention of the system control section 10. Has its characteristics.

The operation of detecting the number of consecutive "1" s will be described below.

As shown in FIG. 3, when the communication control unit 12 issues a detection start command, the command decoding unit 21 decodes the address and outputs the start / stop signal to the clock gate unit 22. Is activated and the operation of the clock gate unit 22 is started.

When the start / stop signal is input, the clock gate unit 22 first outputs the reset signal RS to the "1" counting unit 23 and resets it, and then resets the serial clock DCLK of the modem unit 6 to the system clock. The sampling serial clock SDCLK sampled by SCLK is inverted and output to the “1” counting unit 23 as the count clock CC. Further, as shown in FIG. 3, the clock gate unit 22 samples the data RXD of the modem unit 6 with the sampling serial clock SDCLK.
When the data RXD is “0”, the reset signal RS is output to the “1” counting unit 23.

The "1" counting section 23 sequentially counts the count clock CC inputted from the clock gate section 22, and when the reset signal RS is inputted from the clock gate section 22, as shown in FIG. Reset the value. That is, the “1” counting unit 23 counts the count clock CC while the reset signal RS is input from the clock gate unit 22, and sets the count value CV as the continuous number of “1” in the 3-state buffer unit 24.
Output to

When the read signal is input from the command decoding unit 21, the 3-state buffer unit 24 receives the count value C input from the "1" counting unit 23 at that time.
V is output to the data bus of the communication control unit 12.

As a result, the communication control unit 12 outputs the detection start command to the "1" detection unit 5 to count the number of consecutive "1" s, and issues the read command at the necessary timing. By outputting to 5, the continuous number of "1" can be acquired, and the continuous number of "1" can be detected at high speed without the intervention of the system control unit 10.

Therefore, the communication control unit 12 can quickly determine the end of the facsimile control signal, especially the facsimile control signal, and high-speed facsimile communication using the full-duplex mode modem unit 6 can be performed.

FIG. 4 is a diagram showing a second embodiment of the signal detecting device of the facsimile apparatus of the present invention. This embodiment is for detecting ten consecutive "1" s. It corresponds to 2.

The present embodiment is applied to the same facsimile machine and "1" counting section as in the first embodiment, and the same components as those in the first embodiment are not provided. , The same reference numerals are given, and the detailed description thereof is omitted.

In FIG. 4, the "1" detecting section 30 is applied to the facsimile apparatus 1 similar to the facsimile apparatus 1 of the first embodiment, and the command decoding similar to the "1" detecting section 5 is performed. Unit 21, clock gate unit 2
2, "1" counting unit 23 and 3-state buffer unit 2
4 and a count value comparison unit 31.

The count value comparison section (comparison means) 31 includes
The count value CV of the "1" count unit 23 is input, and "10" is preset as a comparison reference value for comparison with the count value CV.

The count value comparison unit 31 compares the count value CV input from the "1" count unit 23 with the comparison reference value "1".
When the count value CV is compared with the comparison reference value “10”, the interrupt signal INT is output to the communication control unit 12.

Therefore, in this embodiment, when the data (signal) of the modem unit 6 is continuously "1""10", the count value comparison unit 31 causes the interrupt signal I to that effect.
Since NT is output to the communication control unit 12, the communication control unit 12
This interrupt signal INT can promptly know that "10" consecutive facsimile control signals of "1" have been received, and the facsimile control signal can be detected at a higher speed and the facsimile can be sent at a higher speed. Can communicate.

The comparison reference value of the count value comparison section 31 is not limited to "10", but another comparison reference value suitable for discriminating the type of the facsimile control signal, for example, "40". And so on.

FIG. 5 is a diagram showing a third embodiment of the signal detecting apparatus of the facsimile apparatus of the present invention. In the present embodiment, the number of consecutive "1" s to be detected is switched from the communication control unit. And corresponds to claim 3.

The present embodiment is applied to the same facsimile machine and "1" counting section as in the first embodiment, and the same components as those in the first embodiment are not provided. , The same reference numerals are given, and the detailed description thereof is omitted.

In FIG. 5, the "1" detection unit 40 is applied to the same facsimile machine 1 as the facsimile machine 1 of the first embodiment, and the "1" detection unit of the first embodiment is used. 5, the command decoding unit 21, the clock gate unit 22, the “1” counting unit 23, and the 3-state buffer unit 24 are provided, and the count value comparing unit 41 and the comparison value switching unit 42 are provided.

The count value comparison section (comparison means) 41 includes
The count value CV of the "1" counting unit 23 is input, and at least two types of comparison reference values, for example, "1" are used as comparison reference values for comparison with the count value CV.
"0" and "40" are preset.

A switching signal is input from the comparison value switching unit 42 to the count value comparison unit 41, and the count value comparison unit 41
When the switching signal is input from the comparison value switching unit 42, the comparison reference value designated by the comparison signal is set as the comparison reference value.

The count value comparison unit 41 compares the count value CV input from the "1" count unit 23 with the comparison value switching unit 4
When the count value CV is compared with the comparison reference value specified by 2, the interrupt signal INT is output to the communication control unit 12.

The comparison value switching unit (designating means) 42 is connected to the data bus of the communication control unit 12 and the command decoding unit 21, and the comparison value switching unit 42 includes the communication control unit 12.
The comparison value switching signal is input from the device via the data bus, and the data is input from the command decoding unit 21.

When the comparison value switching signal is input from the communication control unit 12, the comparison value switching unit 42 receives the command decoding unit 2.
The count value comparison unit 4 based on the data input from 1
A switching signal designating the comparison reference value indicated by the data is output to 1, and the count value comparison unit 41 sets the comparison reference value designated by the switching signal as the comparison reference value.

Therefore, in the present embodiment, the communication control unit 12 outputs the comparison value switching signal to the comparison value switching unit 42 according to the facsimile control procedure, and switches the comparison reference value of the count value comparison unit 41. If the data (signal) of the modem section 6 is continuously set to "1" by the set comparison reference value, the count value comparison section 4
1 outputs an interrupt signal INT to that effect to the communication control unit 12.

As a result, the communication control unit 12 can quickly know that the continuous facsimile control signal of "1" has been received by the comparison reference value by the interrupt signal INT, and the plurality of facsimile control signals can be further detected. It is possible to detect at a higher speed and perform facsimile communication at a higher speed.

The comparison reference value set in the count value comparison section 41 is not limited to two types,
Two or more types of comparison reference values may be set.

FIG. 6 is a diagram showing a fourth embodiment of the signal detecting apparatus of the facsimile apparatus of the present invention. In this embodiment, a comparison reference value which is the number of consecutive "1" s to be detected is used. It is arbitrarily set by the communication control unit and corresponds to claim 4.

The present embodiment is applied to the same facsimile machine and "1" counting section as in the first embodiment, and the same components as those in the first embodiment are not provided. , The same reference numerals are given, and the detailed description thereof is omitted.

In FIG. 6, the "1" detection unit 50 is applied to the same facsimile device 1 as the facsimile device 1 of the first embodiment, and the "1" detection unit of the first embodiment is used. 5, a command decoding unit 21, a clock gate unit 22, a “1” counting unit 23, and a 3-state buffer unit 24 are provided, and a count value comparing unit 51 and a comparison value setting unit 52 are provided.

The count value comparison section (comparison means) 51 includes
The count value CV of the “1” counting unit 23 is input, and the set comparison reference value is input from the comparison value setting unit 52.

The count value comparison unit 51 compares the count value CV input from the "1" count unit 23 with the comparison value setting unit 5
When the count value CV is compared with the setting comparison reference value input from 2, and the count comparison value CV matches the setting comparison reference value, the interrupt signal IN
T is output to the communication control unit 12.

The comparison value setting section (reference value setting means) 52 is
Data bus of communication control unit 12 and command decoding unit 2
The comparison value setting unit 52 receives the comparison value setting signal from the communication control unit 12 via the data bus and the command decoding unit 21 receives data.

When the comparison value setting signal is input from the communication control unit 12, the comparison value setting unit 52 receives the command decoding unit 2
The count value comparison unit 4 based on the data input from 1
The comparison reference value indicated by the data is output to 1 as the set comparison reference value.

Therefore, in the present embodiment, the communication control unit 12 outputs the comparison value setting signal to the comparison value setting unit 52 in accordance with the facsimile control procedure, and the count value comparison unit 51 appropriately outputs the comparison reference. By setting the value, if "1" continues in the data (signal) of the modem unit 6 by the set comparison reference value, the count value comparison unit 51
Outputs an interrupt signal INT to that effect to the communication control unit 12.

As a result, the communication control unit 12 can quickly know that the continuous facsimile control signal of "1" by the comparison reference value has been received by the interrupt signal INT, and various facsimile control signals can be further detected. It is possible to detect at a higher speed and perform facsimile communication at a higher speed.

As described above, the invention made by the inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible.

For example, in the above embodiment, the V. I am using a V.34 modem. It is not limited to 34.

[0082]

According to the signal detecting device of the facsimile apparatus of the first aspect of the present invention, the continuous number of "1" is counted from the serial output data of the modem without the intervention of the control means of the facsimile apparatus. The continuous number of "1" of the facsimile control signal can be detected in real time, and the facsimile control signal can be detected appropriately and at high speed to perform high-speed facsimile communication by the full-duplex modem.

According to the signal detecting device of the facsimile apparatus of the present invention, the comparison reference value set as the continuous number of "1" suitable for discriminating the type of the facsimile control signal is set to the comparison reference value of the facsimile control signal. The arrival of the continuous number of "1" can be detected promptly, and the facsimile control signal can be detected even faster. As a result, the facsimile communication can be performed more appropriately and at higher speed.

According to the signal detecting device of the facsimile apparatus of the present invention, the plurality of comparison reference values indicating the continuous number of "1" suitable for discriminating the type of the facsimile control signal are set by switching. Thus, it is possible to quickly detect that the number of consecutive "1" s in the facsimile control signal has reached the comparison reference value, and it is possible to detect a plurality of facsimile control signals at a higher speed. As a result, the facsimile communication can be performed more appropriately and at higher speed.

According to the signal detecting device of the facsimile apparatus of the fourth aspect of the present invention, the number of consecutive "1" suitable for discriminating the type of the facsimile control signal is compared with the detected facsimile control signal. By appropriately setting the reference value, it is possible to quickly detect that the number of consecutive "1" s in the facsimile control signal has reached the comparison reference value, and it is possible to detect various facsimile control signals at a higher speed. it can. As a result, much faster and
Facsimile communication can be appropriately performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a facsimile device to which a first embodiment of a signal detection device of a facsimile device of the present invention is applied.

FIG. 2 is a detailed circuit block diagram of a “1” detection unit in FIG.

FIG. 3 is a timing chart of signals of respective parts of the “1” detection unit in FIG.

FIG. 4 is a detailed circuit block diagram of a “1” detection unit of a facsimile apparatus to which the second embodiment of the signal detection apparatus of the facsimile apparatus of the present invention is applied.

FIG. 5 is a detailed circuit block diagram of a “1” detection unit of a facsimile apparatus to which the third embodiment of the signal detection apparatus of the facsimile apparatus of the present invention is applied.

FIG. 6 is a detailed circuit block diagram of a “1” detection unit of a facsimile apparatus to which the fourth embodiment of the signal detection apparatus of the facsimile apparatus of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 Image memory 3 Reading section 4 Recording section 5, 30, 40, 50 "1" detection section 6 Modem section 7 NCU section 8 Operation display section 9 System memory 10 System control section 11 Encoding / decoding section 12 Communication control unit 13 Bus 21 Command decoding unit 22 Clock gate unit 23 "1" counting unit 24 3-state buffer unit 31, 41, 51 Count value comparing unit 42 Comparison value switching unit 52 Comparison value setting unit

Claims (4)

[Claims] 1. A predetermined facsimile control signal modulated and demodulated by a modem having a serial interface for transmitting and receiving signals, at least a part of which transmits and receives signals in full duplex, is exchanged with a partner facsimile machine. Is a signal detection device of a facsimile device for performing facsimile communication, and is connected to the serial interface of the modem and latches the serial data output of the modem at predetermined timing, and the serial data of the modem is When the value is "0", the reset means outputs a reset signal to the counting means, and the continuous number of "1" is counted based on the latch result of the latch means, and the count value is output by the reset signal output from the reset means. Counting means for resetting the Based on the counting result of the means,
A signal detecting apparatus for a facsimile apparatus, which detects the facsimile control signal. 2. A predetermined facsimile control signal modulated and demodulated by a modem having a serial interface for transmitting and receiving a signal, and at least a part of which transmits and receives a signal in full duplex, is exchanged with a partner facsimile machine. And a latching unit that is connected to the serial interface of the modem and latches the serial data output of the modem at a predetermined timing, and a serial data of the modem is When the value is "0", the reset means outputs a reset signal to the counting means, and the continuous number of "1" is counted based on the latch result of the latch means, and the count value is output by the reset signal output from the reset means. Counting means for resetting the Comparing the count value with a predetermined comparison reference value, and when the count value reaches the comparison reference value,
A signal detecting device for a facsimile machine, comprising: a comparing means for outputting a reaching signal; and detecting the facsimile control signal based on the reaching signal output by the comparing means. 3. A predetermined facsimile control signal modulated and demodulated by a modem having a serial interface for transmitting and receiving a signal, and at least a part of which transmits and receives a signal in full duplex, is exchanged with a partner facsimile machine. And a latching unit that is connected to the serial interface of the modem and latches the serial data output of the modem at a predetermined timing, and a serial data of the modem is When the value is "0", the reset means outputs a reset signal to the counting means, and the continuous number of "1" is counted based on the latch result of the latch means, and the count value is output by the reset signal output from the reset means. Counting means for resetting and multiple comparisons that can be switched A comparison unit that has a reference value, compares the count value of the counting unit with one of the plurality of comparison reference values, and outputs a reaching signal when the count value reaches the comparison reference value; A designation means for designating one of a plurality of comparison reference values possessed by the comparison means, the comparison means compares the count value with the comparison reference value designated by the designation means, and the reaching means outputs the comparison result. A signal detecting apparatus for a facsimile apparatus, which detects the facsimile control signal based on a signal. 4. A predetermined facsimile control signal, which is modulated and demodulated by a modem having a serial interface for transmitting and receiving signals, at least a part of which transmits and receives signals in full duplex, is exchanged with a partner facsimile machine. And a latching unit that is connected to the serial interface of the modem and latches the serial data output of the modem at a predetermined timing, and a serial data of the modem is When the value is "0", the reset means outputs a reset signal to the counting means, and the number of consecutive "1" is counted based on the latch result of the latch means, and the count value is output by the reset signal output from the reset means. Counting means for resetting the Comparing the count value with the input comparison reference value, and when the count value reaches the comparison reference value, a comparing unit that outputs a reaching signal, and a reference value setting that outputs a predetermined comparison reference value to the comparing unit. The comparison means compares the count value with the comparison reference value input from the reference value setting means, and detects the facsimile control signal based on the arrival signal output from the comparison means. A signal detecting device for a facsimile machine, characterized by: