JPH08336024A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To accurately detect CNG (call tone) signals by eliminating the signals of the same frequency component as a prescribed frequency component included in a voice response. CONSTITUTION: When a circuit is closed by the exchange of a telephone line 8 and signal tones for indicating a call are sent out, a detected value is transmitted to a main control part 5 by a call detector 7. The main control part 5 turns ON a line connection relay CML, connects a switch SW to the side of a point B and sends out a voice response message from a voice send-out part 4. The duration and the time from the reproduction start of the signals of the frequency component of 1100Hz included in the voice response message are stored beforehand in the storage part 2 of voice spectrums. Then, when the CNG signals and the voice signals of 1100Hz are detected coexistingly, by eliminating the same signals as the stored signals, only the CNG signals are detected. Thus, the signals of the prescribed frequency component sent out from a caller are surely detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine equipped with a voice response device.

[0002]

2. Description of the Related Art Conventionally, there has been known a facsimile apparatus which records a voice response, reproduces the voice response when an incoming call is received, and automatically switches between a telephone function and a facsimile function based on a signal from a transmission partner. There is. When the calling side is a facsimile device, the automatic switching between the telephone and the facsimile by such a voice response device sends C
NG signal (signal indicating that the calling side is a non-voice terminal)
This is done by specifying the calling terminal based on the arrival of the call.

[0003]

The voice response signal from the voice response device is sent to the calling side and is also received by the receiving device of the called side facsimile machine. When performing facsimile communication First, CNG (Calling Tone) indicating that the calling terminal is a non-voice terminal, that is, a facsimile
Send a signal. The called side monitors this CNG signal, and when it detects the CNG signal, it switches to facsimile reception and performs facsimile communication. When the CNG signal cannot be detected for a predetermined period, the call is switched to the telephone. By the way, the voice response signal includes a frequency component of 1100 Hz that constitutes a CNG signal. For this reason, it becomes confusing with the CNG signal sent from the calling side, the CNG signal cannot be correctly detected, or the voice signal is erroneously detected as the CNG signal, and automatic switching between the telephone and the facsimile is performed correctly. It happened even if it was not forgotten.

The present invention has been made in view of the above problems, and provides a facsimile apparatus capable of accurately detecting a CNG signal by removing a signal having the same frequency component as a signal having a predetermined frequency component included in a voice response. The purpose is to provide.

[0005]

In order to achieve the above object, in the invention of claim 1, a voice transmitting means for reproducing and transmitting a voice response message when an incoming call from a caller is detected,
Detecting means for detecting the signal of the predetermined frequency component transmitted from the sender and the signal of the predetermined frequency component contained in the response message, and the time from the start of reproduction of the signal of the predetermined frequency component contained in the voice response message And storage means for storing the duration, and control means for removing the signal of the predetermined frequency component stored in the storage means from the signal of the predetermined frequency component received by the receiving means.

According to a second aspect of the invention, the control means removes the coincident signal by comparing with the data stored in the storage means every time the receiving means receives the signal of the predetermined frequency.

According to a third aspect of the present invention, the control means compares the signal of the predetermined frequency component received by the receiving means in a predetermined period with the data stored in the storage means, and removes the coincident signal.

According to a fourth aspect of the present invention, the predetermined frequency component is a frequency component of a CNG signal representing a calling non-voice terminal.

[0009]

According to the first aspect of the invention, the time from the start of signal reproduction of the predetermined frequency component contained in the voice response message and its duration are stored in the storage means. The detection means detects the signal of the predetermined frequency component transmitted from the sender and the signal of the predetermined frequency component included in the voice response signal. When the signal of the predetermined frequency component detected by the detection unit matches the signal of the predetermined frequency component included in the voice response signal read from the storage unit, the control unit removes the matched signal. This makes it possible to reliably detect the signal of the predetermined frequency component transmitted from the sender.

According to the second aspect of the invention, the control means compares each time the detection means detects the signal of the predetermined frequency component with the signal of the predetermined frequency component included in the voice response signal read from the storage means, and compares the signals. If they match, the signal is removed. This makes it possible to reliably detect the signal of the predetermined frequency component transmitted from the sender.

In the invention of claim 3, the control means compares the signal of the predetermined frequency component received by the detection means in the predetermined period with the data of the voice response signal stored in the storage means, and removes the coincident signal. , It is possible to reliably detect the signal of the predetermined frequency component transmitted from the sender.

According to the invention of claim 4, since the predetermined frequency component is the frequency component of the CNG signal, it is possible to detect that the sender is a facsimile machine.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the embodiment. The facsimile apparatus 10 includes a modem 1, a storage unit 2, an operation unit 3, a voice transmission unit 4 and a main control unit 5, and the modem 1 modulates transmission data and demodulation of reception data. The storage unit 2 serves as a work area for the main control unit 4, and further stores a signal of a predetermined frequency component included in the voice response message transmitted from the voice transmitting unit 4. The operation unit 3 has a touch panel on which an operator inputs an instruction and a display panel which displays input data and an instruction to the operator.
The voice transmitting unit 4 transmits a voice response message when the telephone line 8 is closed. The response message is recorded in advance on a tape or the like, and the response message is transmitted by reproducing this. The main controller 5 has a facsimile function and controls the whole.

A telephone 6 and a line connection relay CML are connected in parallel to the telephone line 8, and the CML and the communication transformer TR are connected.
The telephone line 8 is connected to the facsimile apparatus 10 via the. The signal transmission route changeover switch SW is a switch for switching between a voice response message and transmission data, and is connected to the A point side when transmitting a facsimile and to the B point side when transmitting a voice response message. The call detector 7 detects a 16 Hz signal indicating a call from an exchange (not shown) on the telephone line 8 and transmits it to the main controller 5.

Next, the operation will be described. The circuit is closed by the exchange of the telephone line 8 and indicates a call 16Hz
When the signal sound is transmitted, the call detector 7 transmits the detected value to the main controller 5. The main control unit 5 turns on the line connection relay CML, connects the switch SW to the point B side, and sends a voice response message from the voice transmitting unit 4.
This voice response message is sent to the calling side by the telephone line 8 and is also transmitted to the main control section 5 through the modem 1. When the calling side is a facsimile machine, a CNG signal indicating a facsimile is sent to the telephone line 8.

FIG. 2 shows the signal being sent to the telephone line 8. A CNG signal having an interval of 3 seconds is transmitted from the calling side for 1 second at 0.5 seconds, and a voice response signal is transmitted from the called side. Both of these signals are also transmitted to the main control unit 5. FIG. 2 shows the 1100 Hz component included in the voice response signal and the CNG signal. Since the voice response signal is a voice, it includes many frequency components and also includes a 1100 Hz component. This 1100H
Since the z signal has the same frequency as the CNG signal, the CNG signal cannot be detected without removing it. Therefore, the 1100 Hz component included in the voice response signal is stored in advance,
When a signal of 1100 Hz is detected, it is discriminated whether it is a CNG signal or a voice response signal, and if it is a voice response signal, this is removed.

FIG. 2 shows the data stored in the storage unit 2 of the voice spectrum included in the voice response signal. The component having a frequency of 1100 Hz in the voice response signal is the time Tn1 from the start of the voice response and 110
The time of the duration Tn2 of 0 Hz is stored. FIG.
Shows a state in which the voice response signal having 1100 Hz shown in is removed from the mixed state of the CNG signal and the voice response signal shown in FIG. This makes CN
It is possible to reliably detect the G signal.

FIG. 3 is a diagram showing a format in which a signal having a 1100 Hz component of the voice response signal is stored in the storage unit 2. 2 shows the method of storing Tn1 and Tn2 shown in FIG. 2, in which the time of T11 is stored at address +0,
The time of T12 is stored in the address +2. T11 indicates the time from the sending of the voice response signal to the detection of the first 1100 Hz, and T21 indicates the time when this 1100 Hz continues. The unit of time is msec. Similarly, up to Tn1 and Tn2 are stored.

FIG. 4 is a flow chart for storing the spectrum of the voice response signal in the recording unit 2. Start the audio playback device (S1) and simultaneously start the timer (S1).
2). When the signal of 1100 Hz is monitored and detected (S
3) The time from the start of voice response is stored (S4). In the example of FIG. 2, the detection of 1100 Hz is the position of a,
The time from the start of the voice response is T11. 1100Hz
Is continued (S5), if the voice response is not completed (S7), wait until the continuation of 1100 Hz is completed, and when it is completed and comes to the position of b in FIG. 2 (S5),
The time from a to b, that is, the duration of 1100 Hz, T12 in FIG. 2 is stored (S6). In this way, the process returns to step S3 again, and the detection of the next 1100 Hz is started. By repeating steps S3 to S7 in this manner, T21, T22, T31, and T3 shown in FIG.
The time of 2 is memorized, and when the voice response ends (S
1, S8), and ends.

FIG. 5 is a flow chart showing the operation of removing the CNG signal every time the signal of the 1100 Hz component of the voice response signal is detected in order to detect the CNG signal. The CNG signal is shown in FIG.
As shown in (1), 1100 Hz continues for 0.5 seconds, and the pattern that appears again at intervals of 3 seconds is repeated. This pattern is called a CNG pattern. The CNG detection guard timer is a timer that operates for a certain period while detecting a CNG signal. The voice spectrum timer is a timer that operates during the time of voice response, and is the same as the timer described in S2 of FIG.

The CNG detection guard timer is started (S11) and the sending of the voice response message is started (S11).
12). At the same time, the voice spectrum timer is started (S13). When the 1100 Hz signal is detected before the CNG detection guard timer expires (S14) (S15), the detected voice spectrum timer values Tn1 and Tn2 of the 1100 Hz signal match the stored values shown in FIG. Find out what to do. If they match (S16), the signal is a voice response message, so this signal is ignored and ignored. If they do not match (S
16) Assume that a CNG signal of 1100 Hz is detected (S17). If the number of this CNG signal is one again, it cannot be confirmed that it is the CNG pattern shown in FIG. 2 (S18), so the process returns to step 14 again, and if the guard timer has not ended, the detection of the next 1100 Hz After waiting and detecting (S15), it is checked whether or not it matches the spectrum storage value, and if it matches, it is ignored (S16), and if it does not match, a CNG signal of 1100 Hz is detected (S17). If this CNG signal and the previously detected CNG signal can be detected to have the CNG pattern of FIG. 2 (S18), it can be confirmed that the CNG signal is from the calling side, and the facsimile reception starts. When 1100 Hz is not detected in step 15 and the voice response ends (S19), the voice response device is stopped (S20).

FIG. 6 is an operation flow chart showing another method for detecting the CNG signal by separating it from the voice response signal. This method stores all 1100 Hz signals received during a certain period, and removes the already stored 1100 Hz voice response signal from the stored signals. The method shown in FIG. 5 removes the 1100 Hz component of the voice response signal every time it is detected, whereas the method shown in FIG. 6 removes the 1100 Hz component of the voice response signal after recording all the 1100 Hz component. As the timer, a CNG detection timer is further provided in addition to the timer used in FIG. The CNG detection timer starts when it detects a signal of 1100 Hz, operates for a certain period of time, and ends. The fixed period is, for example, about 5 seconds, and during this period, as shown in FIG.
It is assumed that the CNG pattern shown in is detected.

The CNG detection guard timer is started (S31), and the voice response message is started (S3).
2). At the same time, the voice spectrum timer is started (S33). If the 1100 Hz signal is detected before the CNG detection guard timer expires (S34) (S35), the CNG detection timer is started (S36). The reception signal during the operation of the CNG detection timer is stored in the storage unit 2 (S38), and the reception signal is stored until the voice timer ends (S39). CNG
When the detection timer ends, the received 1100 Hz signal is compared with the stored voice response signal shown in FIG. 3 and the matched signal is removed as a voice response signal (S4).
0). It is investigated whether the CNG signal remaining after the removal constitutes the CNG pattern shown in FIG. 2 (S41).
If the pattern is configured, the facsimile reception starts. If not configured, steps S34 to S41 are repeated.
As a result, the CNG pattern can be reliably detected.

When the CNG signal is detected as described above, facsimile reception starts. Therefore, the switch SW is connected to the point A side so that the facsimile apparatus can transmit and receive, and after the connection procedure is performed, the reception of the image data is started. When the CNG signal is not detected, the line connection relay CML is turned off and the telephone call is performed.

[0026]

As is apparent from the above description, according to the present invention, a signal having a frequency of 1100 Hz included in a voice response is stored in advance, and a CNG signal and a voice response signal of 1100 Hz are detected in a mixed manner. In that case, only the CNG signal can be detected by removing the same signal as the stored signal. Each time the same signal as the stored signal is input, a method for removing this signal and all 1100 Hz data received during a certain period are stored, and this is stored as a voice response signal. There is a method of removing the matched signal as a voice response signal in comparison with the above method, and any method can be implemented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment.

FIG. 2 is a diagram illustrating a method of removing a voice response signal having a component of 1100 Hz from a CNG signal, shows a voice response and a state in which CNG is transmitted to a line, and shows a signal having 1100 Hz of the voice response. Shows a voice response signal having 1100 Hz. Shows a state in which the voice response signal is removed and only the CNG signal is shown.

FIG. 3 is a diagram showing a format for storing a voice response signal having a component of 1100 Hz.

FIG. 4 is an operation flow chart of storing a voice response signal having a component of 1100 Hz in a storage unit.

FIG. 5: Each time a 1100 Hz voice response signal is detected,
Operation flow chart to remove this and receive only CNG signal

FIG. 6 is an operation flow chart in which a signal having a 1100 Hz component including a CNG signal is stored for a certain period of time, and a matched signal is removed by comparison with a previously stored 1100 Hz voice response signal to obtain only a CNG signal.

[Explanation of symbols]

 1 modem 2 storage unit 3 operation unit 4 voice transmission unit 5 main control unit 6 telephone 7 call detector 8 telephone line

Claims (4)

[Claims] 1. A voice transmitting means for reproducing and transmitting a voice response message when an incoming call from a caller is detected, and a signal of a predetermined frequency component transmitted from the caller and a predetermined frequency component included in the response message. From detection means for detecting a signal, storage means for storing the time and duration from the start of reproduction of the signal of the predetermined frequency component included in the voice response message, and from the signal of the predetermined frequency component received by the receiving means A facsimile apparatus comprising: control means for removing the signal of the predetermined frequency component stored in the storage means. 2. The control means, every time the receiving means receives the signal of the predetermined frequency, compares it with the data stored in the storage means and removes the coincident signal. The described facsimile machine. 3. The control means compares the signal of the predetermined frequency component received by the receiving means in a predetermined period with the data stored in the storage means, and removes a coincident signal. The facsimile apparatus according to Item 1. 4. The facsimile apparatus according to claim 1, wherein the predetermined frequency component is a frequency component of a CNG signal representing a calling side non-voice terminal.