JP2000013531A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a facsimile equipment for discriminating tone signals sent from an opposite party during voice transmission from voice signals, detecting them with high accuracy and providing various kinds of functions. SOLUTION: At recording of a voice message, this facsimile equipment 1 amplifies the voice signals of the voice message inputted from a microphone 8 in a microphone amplifier 9 and then, inputs them into a band-pass filter 10, a changeover part 11 and a band detection part 12. The band-pass filter 10 removes the frequency components of detection tone signals such as CNG signals from the voice signals, and the band detection part 12 detects whether or not the frequency components of the detection tone signals are included in the voice signals. A control part 15 makes the changeover part 11 output the voice signals from the microphone amplifier 9 to a voice synthesis part 13, while the frequency components of the detection tone signals are not included, and when the band detection part 12 detects that the frequency components of the detection tone signals are included, makes it output the voice signals from the band-pass filter 10 to the voice synthesis part 13 only for a prescribed time after the lapse of the prescribed time after the detection, encodes them in the voice synthesis part 13 and makes it stores them in a voice storage part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a facsimile apparatus, and more particularly, to a facsimile apparatus which detects a predetermined tone signal sent from a destination during voice transmission and provides various functions.

[0002]

2. Description of the Related Art In recent years, facsimile apparatuses have been reduced in size, cost, and built-in telephone functions, and can be used as both a facsimile apparatus and a telephone by connecting to one telephone line. Therefore, it has been used in ordinary households and small and medium-sized enterprises. In such ordinary households and small and medium-sized enterprises, a facsimile machine does not require a new telephone line, and a telephone is connected externally.
2. Description of the Related Art A facsimile machine with a telephone function having a built-in telephone is widely used.

In a facsimile apparatus having such a built-in or external telephone, voice guidance is transmitted,
When a CNG (Calling Tone) signal transmitted from the transmitting side is detected, a line automatic switching function for automatically connecting a telephone line to the facsimile apparatus is provided.

[0004] In a facsimile apparatus having an automatic switching function, the voice transmission unit transmits voice guidance such as "Please wait for a telephone, please press a send button for a fax". When the transmission button is pressed in response to the voice guidance in the case of a fax, detection of a CNG signal transmitted from the other party is started. When the facsimile apparatus detects that the CNG signal has been transmitted from the other party within a predetermined time, the facsimile apparatus switches to the facsimile mode and starts facsimile reception. When the telephone is ringed and the receiver goes off-hook, conversation by the telephone is enabled.

Conventionally, a facsimile apparatus detects a DTMF (Dual Tone Multifrequency) signal corresponding to an input operation of a destination in response to voice guidance from a voice transmission unit, and transmits information corresponding to the DTMF signal. Some of them have been provided with a facsimile information service, a remote function, etc., which are provided by transmission or activate various functions of the facsimile apparatus in accordance with the DTMF signal and provide the functions. In a facsimile apparatus having such a facsimile information service and a remote function, it is necessary to accurately detect a DTMF signal transmitted from a destination while transmitting voice guidance.

Therefore, conventionally, a plurality of narrow-band tone detectors whose detection frequency bands are different from each other and which are adjacent but partially shared by the detection frequency bands, and a desired narrow-band tone detector based on the detection outputs of the plurality of narrow-band tone detectors. There has been proposed a tone detector characterized by comprising a discriminating means for discriminating the tone signal of (1) (refer to Japanese Patent Application Laid-Open No. 7-221872).

Conventionally, a line is connected in response to an incoming call, a predetermined voice message signal is transmitted to the line by voice response means, and a predetermined frequency band is selected from signals transmitted through the line by tone detection means. A facsimile apparatus for detecting the tone signal of the above, further comprising an attenuating means for attenuating the component of the predetermined frequency band from the voice message signal output from the voice response means, and then transmitting the attenuated component to the line. A facsimile apparatus having a feature has been proposed (see Japanese Patent Application Laid-Open No. 8-97997).

Further, when a single-frequency signal in a voice domain and a wide-band signal having a frequency spectrum in a voice domain including the single-frequency signal are simultaneously input, the tone detection device detects the single-frequency signal. hand,
A first narrow-band filter for extracting the single-frequency signal, a second filter for extracting a partial frequency band in the wide-band signal excluding the frequency of the single-frequency signal, A converting means for converting each passband signal into a direct current from the second filter, a direct current obtained by converting the single frequency signal extracted by the first filter by the converting means, and extracting by a second filter When the wideband signal is not input, a detection result transmitting unit that transmits a detection signal indicating that the single frequency signal has been detected,
There has been proposed a tone detection device characterized by comprising (see JP-A-8-256221).

[0009]

However, in such a conventional tone detector or facsimile apparatus, a detected tone signal such as a CNG signal or a DTMF signal transmitted from a destination while voice guidance is being transmitted. There was still a problem in properly detecting.

That is, since the voice signal of the voice guidance transmitted from the signal transmitting side of the facsimile apparatus to the other party goes to the signal detector on the signal input side of the facsimile apparatus, the voice signal is appropriately distinguished from the CNG signal or the DTMF signal. Need to be detected.

However, in the tone detector described in Japanese Patent Application Laid-Open No. 7-221872, a narrow band tone detector attempts to detect and detect a tone signal from noise. If there is an audio signal whose frequency component is similar and the audio signal of such a frequency component is included in the audio signal of the audio guidance, the conventional tone detector detects the audio signal and the tone signal by appropriately distinguishing them. Can not do it.

Also, in the facsimile apparatus described in Japanese Patent Application Laid-Open No. 8-97997, a voice message in which all the frequency components of the CNG signal in the voice signal of the voice message are attenuated is transmitted. There has been a problem that the voice quality of the message is degraded, it becomes difficult for the other party to hear the message, and the function as the voice message cannot be sufficiently performed.

Further, in the tone detecting device described in Japanese Patent Application Laid-Open No. 8-256221, a first filter and a second
Is provided, and when the second filter is not detected,
When the first filter extracts a single frequency signal, it is determined that a tone signal has been detected, and therefore, the conventional tone detection device cannot properly distinguish and detect a voice signal and a detected tone signal. That is, the audio signal includes C
There is an audio signal whose frequency component approximates the NG signal,
If the voice signal of such a frequency component is included in the voice signal of the voice guidance, the above-described tone detection device has a problem that the voice signal and the CNG signal which is the detected tone signal cannot be appropriately distinguished and detected. there were.

Therefore, the invention according to claim 1 is characterized by
A voice message is sent to the other party, and a detection tone signal of a predetermined frequency sent from the other party is detected based on a predetermined detection condition. It detects whether the voice signal of the message contains the frequency component of the detected tone signal, and converts the voice signal output by the voice input unit and the voice signal output by the voice input unit according to the detection result. The audio signal output from the frequency component removing means for removing the frequency component of the detected tone signal from the audio signal to be detected, and storing the audio signal from which the frequency component of the detected tone signal has been removed in the audio storage means. By transmitting the voice signal stored in the voice storage means to the other party as a voice message, the frequency component of the detected tone signal is detected when the voice message is recorded. Only when the received tone signal has a frequency component removed is stored, the stored voice message is transmitted to the other party at the time of an incoming call, and the detection tone is accurately detected while suppressing the deterioration of the voice quality. It is an object of the present invention to provide a facsimile apparatus capable of detecting a signal and preventing erroneous detection of a detected tone signal.

According to a second aspect of the present invention, when an incoming call is received, a voice message is sent to the other party, and a detection tone signal of a predetermined frequency sent from the other party is detected based on a predetermined detection condition. When providing the function, the voice message stored in the voice storage means is reproduced by the voice output unit and output as a voice signal, and the voice signal output from the voice output unit includes the frequency component of the detected tone signal. An audio signal output from the audio output unit and a frequency component removal unit that removes a frequency component of the detected tone signal from the audio signal output from the audio output unit in accordance with the detection result of the band detection unit that detects whether or not the audio signal is output. And an audio signal to be output, which is selectively selected and output by the switching means, and an audio signal of the audio signal obtained by removing the frequency component of the detected tone signal from the audio signal is transmitted to the other party. Only when the frequency component of the detected tone is detected during playback of the voice message, the frequency component of the detected tone is removed from the voice signal of the voice message and transmitted to the other party to suppress the deterioration of voice quality. It is another object of the present invention to provide a facsimile apparatus capable of detecting a detected tone signal with high accuracy and preventing erroneous detection of the detected tone signal.

According to a third aspect of the present invention, in the switching means, after the band detecting means detects that the audio signal contains the frequency component of the detected tone signal, the switching means within a time satisfying the detection condition of the detected tone signal. After a lapse of a predetermined time, the audio signal output by the frequency component removing means is selected, so that only when the audio signal of the audio message satisfies the detection condition of the detected tone signal at the time of recording or reproducing the audio message, the detection is performed. Erroneous detection of the detected tone signal by removing the frequency component of the detected tone signal from the voice signal of the voice message within the range that does not satisfy the conditions and detecting the detected tone signal with high accuracy while further suppressing the deterioration of the voice quality It is an object of the present invention to provide a facsimile apparatus capable of preventing the facsimile.

[0017]

According to the first aspect of the present invention, a facsimile apparatus according to the present invention transmits a predetermined voice message to a destination when an incoming call is received, and generates a predetermined frequency detection tone signal transmitted from the destination. In the facsimile apparatus which provides various functions by detecting based on the detection condition of the above, a voice storage means for storing a voice message to be sent to the destination, and a voice message to be stored in the voice storage means is inputted. A voice input unit that converts a voice message into a voice signal and outputs the voice message; a frequency component removing unit that removes a frequency component of the detected tone signal from the voice signal output from the voice input unit; Band detecting means for detecting whether or not a frequency component of the detected tone signal is included in the audio signal to be output; and the audio input unit. Switching means for selectively selecting and outputting the audio signal to be output and the audio signal output from the frequency component removing means; and controlling a switching operation of the switching means in accordance with a detection result of the band detecting means. The above object is attained by providing control means for storing in the voice storage means a voice message of a voice signal obtained by removing a frequency component of the detected tone signal from the voice signal.

According to the above configuration, when an incoming call is received, a voice message is sent to the other party, and a detection tone signal of a predetermined frequency sent from the other party is detected based on a predetermined detection condition, and various functions are performed. When providing, the voice input unit detects whether the voice signal of the voice message input from the voice input unit includes the frequency component of the detected tone signal, and converts and outputs the voice input unit according to the detection result. An audio signal and an audio signal output by frequency component removing means for removing the frequency component of the detected tone signal from the audio signal converted and output by the audio input unit are selectively selected, and the frequency component of the detected tone signal is selected. Is stored in the voice storage means, and the voice signal stored in the voice storage means is transmitted to the other party as a voice message. Only when the frequency component of the outgoing tone signal is detected, the voice signal from which the frequency component of the detected tone signal has been removed can be stored, and the stored voice message can be transmitted to the other party at the time of an incoming call. Deterioration can be suppressed, and a detection tone signal can be detected with high accuracy to prevent erroneous detection of the detection tone signal.

The facsimile apparatus according to the second aspect of the present invention transmits a predetermined voice message to a destination when an incoming call is received, and detects a detection tone signal of a predetermined frequency transmitted from the destination based on predetermined detection conditions. In a facsimile apparatus that detects and provides various functions, a voice storage unit that stores a voice message to be sent to the destination, and reproduces the voice message stored in the voice storage unit and outputs the voice message as a voice signal. An audio output unit; frequency component removing means for removing a frequency component of the detected tone signal from the audio signal output from the audio output unit; and a frequency of the detected tone signal to the audio signal output from the audio output unit. Band detecting means for detecting whether or not a component is included; and the audio signal output from the audio output unit and the frequency component. Switching means for selectively selecting and outputting the audio signal output by the removing means; and controlling the switching operation of the switching means in accordance with a detection result of the band detecting means to control the detection tone from the audio signal. The above object is achieved by providing control means for transmitting a voice message of a voice signal from which a frequency component of a signal has been removed to the destination.

According to the above arrangement, when an incoming call is received, a voice message is transmitted to the other party, and a detection tone signal of a predetermined frequency sent from the other party is detected based on a predetermined detection condition, thereby performing various functions. In providing the voice message, the voice message stored in the voice storage unit is reproduced by a voice output unit and output as a voice signal, and the voice signal output from the voice output unit includes a frequency component of a detected tone signal. According to the detection result of the band detection means for detecting whether
An audio signal output from an audio output unit and an audio signal output from a frequency component removing unit for removing a frequency component of a detected tone signal from the audio signal output from the audio output unit are selectively selected by a switching unit. The voice message is sent to the other party with the frequency component of the detected tone signal removed from the voice signal, so when the voice message is played back, only when the frequency component of the detected tone is detected, It can remove the frequency component of the detected tone from the signal and transmit it to the other party, which can suppress the deterioration of the voice quality, and detect the detected tone signal with high accuracy to detect the false detection of the detected tone signal. Can be prevented.

In each of the above cases, for example, as set forth in claim 3, the control means may be configured to execute after the band detecting means detects that the audio signal contains the frequency component of the detected tone signal. The switching means may select the audio signal output by the frequency component removing means after a predetermined time has elapsed within a time satisfying the detection condition of the detected tone signal.

According to the above arrangement, after the switching means detects that the frequency signal of the detected tone signal is included in the audio signal by the band detecting means, it is within a time satisfying the detection condition of the detected tone signal. After a lapse of a predetermined time, the audio signal output by the frequency component removing means is selected, so only when the audio signal of the audio message satisfies the detection condition of the detected tone signal at the time of recording or reproducing the audio message,
The frequency component of the detected tone signal can be removed from the voice signal of the voice message within a range that does not satisfy the detection condition, and the deterioration of voice quality can be further suppressed, and the detected tone signal can be detected with high accuracy. As a result, erroneous detection of the detected tone signal can be prevented.

[0023]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIGS. 1 to 4 show a first embodiment of a facsimile apparatus of the present invention.
4. A voice message storing a voice message of a voice signal from which a frequency component of a tone signal to be detected is removed and transmitting the voice message when storing the voice message. It is.

FIG. 1 shows a first embodiment of a facsimile apparatus according to the present invention.
FIG. 2 is a main part circuit block diagram of the facsimile apparatus 1 to which the embodiment of FIG. 1 is applied.

In FIG. 1, a facsimile apparatus 1 includes a voice reproducing unit 2, a modem 3, a switching unit 4, a transmitting amplifier 5, a receiving amplifier 6, a tone detecting unit 7, a microphone 8, a microphone amplifier 9, a bandpass filter 10, a switching unit. 11, band detection unit 12,
A voice synthesizing unit 13, a voice storage unit 14, a control unit 15, and the like are provided, and the main components are connected by a bus 16.

The control unit 15 has a CPU (Central Process
ng Unit), ROM (Read Only Memory) and RAM
(Random Access Memory), etc., based on a program in the ROM, controls each part of the facsimile machine 1 while using the RAM as a work memory, and executes basic processing as the facsimile machine 1 and a voice described later. Execute the switching control process.

The voice storage unit 14 is composed of, for example, a RAM or the like, and stores a voice message input from the microphone 8 in a predetermined signal form. The signal form stored in the sound storage unit 14 is, for example, a signal form in which an analog sound signal input from the microphone 8 is encoded into a digital signal.

In the present embodiment, the microphone 8 is mainly used for inputting a voice message, and the microphone amplifier 9 amplifies an analog voice signal of the voice message input from the microphone 8 to form a band-pass filter 10. The signal is output to the switching unit 11 and the band detection unit 12.

The bandpass filter 10 is a tone signal (DTMF signal or CNG signal) transmitted from the destination while transmitting a voice message from the voice signal input from the microphone amplifier 9 to the destination. A band component of a tone signal (hereinafter, referred to as a detected tone signal) detected by the detection unit 7 is removed, and an audio signal from which the band component has been removed is output to the switching unit 11.

The band detecting section 12 detects whether or not the audio signal input from the microphone amplifier 9 contains a band component (frequency component) of the detected tone signal, and uses the detection result as a frequency detection signal as a control section. 15, and outputs a switching signal instructing the switching operation of the switching unit 11 under the control of the control unit 15. The control unit 15 performs output control of a switching signal that instructs a switching operation of the switching unit 11 that is output from the band detection unit 12 to the switching unit 11 based on the frequency detection signal from the band detection unit 12, as described later. .

The switching unit 11 includes the microphone 8 as described above.
And the voice signal of the voice message, which has been amplified by the microphone amplifier 9 and the voice signal from which the band component of the detected tone signal has been removed by the bandpass filter 10, is inputted. The switching operation is performed in response to the switching signal, and the audio signal from the microphone amplifier 9 and the audio signal from the bandpass filter 10 are selectively switched and output to the audio synthesis unit 13.

The voice synthesizing unit 13 encodes the voice signal input from the switching unit 11 and outputs it to the voice storage unit 14.
The control unit 15 causes the voice storage unit 14 to store the voice signal encoded by the voice synthesis unit 13.

The receiving amplifier 6 is connected to a predetermined line (not shown), for example, a public telephone line.
Amplifies the received signal input from the line and outputs the amplified signal to the modem 3 and the tone detector 7.

The modem 3 operates under the control of the control unit 15, demodulates a reception signal input via the reception amplifier 6, modulates a transmission signal, and outputs it to the switching unit 4.

The tone detecting section 7 receives various tone signals from the received signal input through the receiving amplifier 6, particularly a CNG signal indicating that the terminal is a non-voice terminal for instructing switching between a telephone function and a facsimile function, and the like. Detects various DTMF signals used to provide facsimile information services,
The detection result is output to the control unit 15. Based on the detection result of the tone detection unit 7, the control unit 15 sends out various messages, in particular, a switching operation between the telephone mode and the facsimile mode, and sends out a voice message stored in the voice storage unit 14 to send the voice message to the voice message. DTMF transmitted from the destination machine in response to a key input by the destination operator
A facsimile information service for selectively transmitting various facsimile information (image information) corresponding to a signal is provided.
The facsimile apparatus 1 stores facsimile information to be used for the facsimile information service in an image information storage unit such as a hard disk (not shown) in advance.
5 selects and transmits facsimile information to be transmitted according to the DTMF signal.

The audio reproduction unit 2 operates under the control of the control unit 15 to convert the encoded audio signal transferred from the audio storage unit 14 into an analog audio signal, and to switch the converted audio signal. Output to section 4.

As described above, the audio signal from the audio reproduction unit 2 and the transmission signal from the modem 3 are input to the switching unit 4, and the switching unit 4 operates under the control of the control unit 15, An audio signal from the audio reproduction unit 2 and a transmission signal from the modem 3 are selectively selected and output to the transmission amplifier 5 as a transmission signal.

The transmission amplifier 5 is connected to the line, amplifies the transmission signal input from the switching unit 4, and sends the amplified signal to the line. A transmission signal, particularly a voice signal, transmitted from the transmission amplifier 5 to the line is also partially input to the tone detector 7 on the receiving side via the reception amplifier 6.

Next, the operation of the present embodiment will be described. When the facsimile apparatus 1 stores the voice message to be transmitted, the facsimile apparatus 1 detects the voice signal of the frequency component of the detected tone signal from the voice signal of the voice message in advance and detects the detected tone signal while suppressing the deterioration of the voice quality of the voice message. The feature is that it is removed and stored in a range that improves the accuracy.

That is, when recording a voice message in the facsimile apparatus 1, the operator sets the mode of the facsimile apparatus 1 to the recording mode, and then inputs the voice message using the microphone 8.

When the facsimile apparatus 1 is set to the recording mode and a voice message is loudspeaked and input from the microphone 8, the voice message is converted into an analog voice signal by the microphone 8 and amplified by the microphone amplifier 9. The signals are input to the bandpass filter 10, the switching unit 11, and the band detection unit 12.

The bandpass filter 10 removes the frequency component of the detected tone signal from the input speech signal, and
1, the band detector 12 detects whether or not the input audio signal contains the frequency component of the detected tone signal, and outputs the detection result to the controller 15.

The control unit 15 controls the switching unit 11 to select an audio signal directly input from the microphone amplifier 9 while the band detecting unit 12 does not detect that the frequency component of the detected tone signal is included. The output is made to the synthesizing unit 13. When the band detecting unit 12 detects that the frequency component of the detected tone signal is included, the control unit 15 switches the switching unit 1.
1 to select the audio signal input from the microphone amplifier 9 for a predetermined time ta from the detection, and
3 and when a predetermined time ta elapses, a predetermined time tb
During this period, the audio signal from which the frequency component of the detected tone signal input from the bandpass filter 10 has been removed is selected and output to the audio synthesizer 13. The predetermined time ta and the predetermined time tb are suitable times for preventing the tone signal (detection tone signal) to be detected by the tone detection unit 7 from being erroneously detected and suppressing the deterioration of the voice quality of the voice message as much as possible. Is set, and the predetermined time ta is a time shorter than the standard time of the tone signal to be detected by the tone detector 7.

The voice synthesizing unit 13 encodes the voice signal input from the switching unit 11 and outputs it to the voice storage unit 14. The voice storage unit 14 operates under the control of the control unit 15, and The 13 encoded voice messages are stored.

Therefore, the voice message from which the frequency component of the detected tone signal is removed is stored in the voice storage unit 14 within a range where the tone detecting unit 7 does not erroneously detect the detected tone signal.

That is, as shown in FIG. 2, when the facsimile apparatus 1 is set to the recording mode and a voice message is input from the microphone 8, the band detecting section 12 causes the frequency component of the detected tone signal to change the frequency component of the voice message. It is checked whether it is included in the voice signal (step S1). If the frequency component of the detected tone signal is not included in the voice signal of the voice message, the control unit 15 controls the switching unit 11 via the band detection unit 12. Then, the audio signal from the microphone amplifier 9 is output to the audio synthesizer 13 as it is.

If the frequency component of the detected tone signal is included in the audio signal in step S1, the control unit 15 waits for a predetermined time ta to elapse (step S2).
The switching signal output from the band detection unit 12 to the switching unit 11 is switched to “H” which is a switching signal for selecting an audio signal from the band filter 10 and output (step S3). The input audio signal is switched to the audio signal input from the bandpass filter 10 and output to the audio synthesis unit 13.

When switching the switching signal to "H", the control unit 15 waits for a predetermined time tb to elapse (step S5).
4) The switching signal output from the band detecting unit 12 to the switching unit 11 is switched to “L” which is a switching signal for selecting an audio signal from the microphone amplifier 9 and output (step S5).
It is checked whether the voice transmission has been completed, that is, whether the voice message recording process has been completed (step S6).

If it is determined in step S6 that the recording of the voice message has not been completed, the process returns to step S1.
It is checked whether the frequency component of the detected tone signal is included in the voice signal of the voice message in the voice signal of the voice message.
6) When the voice message recording process ends in step S6, the voice switching control process ends.

Therefore, FIG.
As shown as an example in the case of the MF signal, the band detection unit 12 controls the control unit to output a “high (H)” frequency detection signal indicating that the frequency component of the detected tone signal is included in the voice signal of the voice message. 15 to the control unit 15
Transmits a “Low (L)” switching signal instructing selection of an audio signal from the microphone amplifier 9 to the band detecting unit 12 as a switching signal output from the band detecting unit 12 to the switching unit 11 for a predetermined time ta. After a predetermined time ta has elapsed, the switching signal is switched to a “high” switching signal instructing selection of an audio signal from the bandpass filter 10 and output.

When the switching signal of "low" is input from the band detecting unit 12, the switching unit 11 outputs the audio signal from the microphone amplifier 9 as it is to the audio synthesizing unit 13 as an output signal, and outputs the "high" signal. When the switching signal is input, the audio signal is switched from the audio signal from the microphone amplifier 9 to the audio signal from the bandpass filter 10 and output to the audio synthesis unit 13 as an output signal. Therefore, as the output signal of the switching unit 11, a "high" output signal indicating that the frequency component of the detected tone signal is included in FIG. 3 and a frequency component of the detected tone signal are not included. As shown by the "low" output signal, the frequency detection signal is "high" and the switching signal is "low" only while the "high" output signal, that is, the frequency of the detected tone signal is included. The audio signal that is present is output from the switching unit 11.

Further, as shown in FIG.
Outputs a “high” frequency detection signal indicating that the frequency component of the detected tone signal is included in the voice signal of the voice message to the control unit 15, but before the predetermined time ta elapses, the band detection unit When the control unit 15 outputs a “low” frequency detection signal indicating that the frequency component of the detected tone signal is not included to the control unit 15, the control unit 15 switches the switching signal to “high” to the band detection unit 12. Without giving an instruction, the switching signal to the switching unit 11 remains “low”.

Therefore, even if the voice signal of the voice message includes the frequency component of the detected tone signal, the voice synthesizer 13 includes the frequency component of the detected tone signal during the first predetermined time ta. If the audio signal does not include the frequency component of the detected tone signal before the predetermined time ta elapses, the switch 11 is not switched, and the audio signal from the microphone amplifier 9 is directly input. Is input.

FIG. 4 shows that the detected tone signal is DTMF.
As shown as an example in the case of a signal, if the frequency component of the detected tone signal is included in the voice signal of the voice message for longer than the time (ta + tb) obtained by adding the predetermined time ta and the predetermined time tb, the control is performed. The unit 15 sets the switching signal to “high” after a predetermined time ta has elapsed from the time when the frequency component of the detected tone signal is included in the audio signal, and outputs the audio output from the switching unit 11 to the audio synthesizing unit 13. The signal is converted from the audio signal from the microphone amplifier 9 to the bandpass filter 10.
Is switched to an audio signal from which the frequency component of the detected tone signal has been removed, and when a predetermined time tb has elapsed,
Even if the voice signal of the voice message includes the frequency component of the detected tone signal, the switching signal is switched to “low” and the voice signal output from the switching unit 11 to the voice synthesizing unit 13 is output from the microphone amplifier 9. Switch to audio signal. Therefore, the voice signal including the frequency component of the detected tone signal is input to the voice synthesizing unit 13. However, when the predetermined time ta elapses, the switching signal is set to “high” again to switch. From section 11 to speech synthesis section 13
Is switched from the bandpass filter 10 to an audio signal. It should be noted that once the switching signal is set to “high”, the signal is switched to “low”, and the audio signal input from the microphone 8 is output while the audio signal from the microphone amplifier 9 is being output from the switching unit 11 to the audio synthesizing unit 13. When the frequency component of the detected tone signal is no longer included in the audio signal, the audio signal output from the switching unit 11 to the audio synthesizing unit 13 naturally includes the audio signal input from the microphone 8 as shown in FIG. No longer include the frequency component of the detected tone signal from the point in time when the frequency component of the detected tone signal is no longer included in.

As described above, when the voice signal of the voice message input from the microphone 8 includes the frequency component of the detected tone signal, the detected signal is within a predetermined time range within which the tone detection unit 7 does not erroneously detect the detected signal. At time ta, the audio signal containing the frequency component of the detected tone signal is output to the audio synthesizer 13, and if the frequency component of the detected tone signal is included in the audio signal continuously for a predetermined time ta or more, An audio signal from which the frequency component of the detected tone signal has been removed is output to the audio synthesizer 13.

Therefore, the voice signal of the voice message which is not erroneously detected as the detected tone signal by the tone detecting section 7 can be stored in the voice storage section 14 while suppressing the deterioration of the voice quality of the voice message.

The control unit 15 reads out the voice signal of the voice message stored in the voice storage unit 14 from the voice storage unit 14 when a call is received from a predetermined destination, and outputs the voice signal to the voice playback unit. 2 and converted into an analog audio signal by the audio reproduction unit 2, and then the switching unit 4 and the transmission amplifier 5
Sent to the other party via

The voice signal of this voice message is partly input to the tone detecting section 7 via the receiving amplifier 6, but the voice signal of the voice message is erroneously detected as a detected tone signal as described above. Since the frequency component of the detected tone signal is included in a time range in which the tone message does not occur, the tone detecting unit 7 does not erroneously detect the voice signal of the voice message as the detected tone signal.

As a result, it is possible to appropriately and accurately detect only the detected tone signal transmitted from the destination via the line while suppressing the deterioration of the voice quality of the voice message.

Further, the facsimile apparatus 1 of the present embodiment
After the band detecting unit 12 detects that the frequency component of the detected tone signal is included in the audio signal, within a time that satisfies the detection condition of the detected tone signal and after a predetermined time has elapsed, Since the audio signal output from the bandpass filter 10 has been selected after the elapse of the time ta, only when the audio signal of the audio message satisfies the detection condition of the detected tone signal at the time of recording the audio message, the range that does not satisfy the detection condition is detected. With this, the frequency component of the detected tone signal can be removed from the voice signal of the voice message, so that the deterioration of voice quality can be further suppressed. Detection can be prevented.

FIG. 5 shows a second embodiment of the facsimile apparatus of the present invention.
FIG. 4 is a diagram showing an embodiment of the present invention. In the present embodiment, when a voice message is transmitted, a tone component to be detected is removed after the frequency component is transmitted. Is what you do.

FIG. 5 shows a second embodiment of the facsimile apparatus of the present invention.
FIG. 3 is a main part circuit block diagram of a facsimile apparatus 20 to which the embodiment of FIG. 1 is applied.

In FIG. 5, the facsimile machine 20
Transmission amplifier 21, reception amplifier 22, switching unit 23, switching unit 24, band detection unit 25, band filter 26, audio reproduction unit 27, modem 28, tone detection unit 29, audio storage unit 30
And a control unit 31 and the like. The above-mentioned main units are connected by a bus 32.

The control unit 31 includes a CPU, a ROM, and a RAM.
Based on the program in the ROM, the respective parts of the facsimile apparatus 20 are controlled while using the RAM as a work memory, and the basic processing as the facsimile apparatus 20 is executed, and the voice switching control processing described later is executed. I do.

The voice storage unit 30 is composed of, for example, a RAM or the like, and stores various voice messages in the form of signals that are previously encoded into digital signals.

The tone detecting section 29 detects various tone signals, particularly detected tone signals, from the received signal input via the receiving amplifier 22 and outputs the detection result to the control section 31. The control unit 31 selectively transmits various facsimile information based on the detection result of the tone detection unit 29, in particular, according to a switching operation between a telephone mode and a facsimile mode or a DTMF signal transmitted from a partner machine. To provide a facsimile information service.

The modem 28 operates under the control of the control section 31 to demodulate the received signal input via the receiving amplifier 22 and modulate the transmission signal to output to the switching section 23.

The audio reproduction unit 27 operates under the control of the control unit 31 to convert the encoded audio signal transferred from the audio storage unit 30 into an analog audio signal, and to convert the converted audio signal into a band. Output to the filter 26, the switching unit 24, and the band detection unit 25.

The band filter 26 removes the band component of the detected tone signal from the sound signal input from the sound reproducing unit 27, and outputs the sound signal from which the band component has been removed to the switching unit 24.

The band detecting section 25 detects whether or not the sound signal input from the sound reproducing section 27 contains a band component of the detected tone signal, and outputs the detection result to the control section 31 as a frequency detection signal. Under the control of the control unit 31, a switching signal for instructing the switching operation of the switching unit 24 is output. The control unit 31 includes, as described later, the band detection unit 2
Based on the frequency detection signal from the control unit 5, output control of a switching signal instructing a switching operation of the switching unit 24 output from the band detecting unit 25 to the switching unit 24 is performed.

The switching section 24 receives the audio signal from the band filter 26 and the audio signal from the audio reproducing section 27 as described above, and the switching section 24 responds to the switching signal input from the band detecting section 25. To selectively select the audio signal from the bandpass filter 26 and the audio signal from the audio reproducing unit 27 and output the selected signal to the switching unit 23.

The switching unit 23 receives the transmission signal from the switching unit 24 and the transmission signal from the modem 28, and
, The transmission signal from the switching unit 24 and the transmission signal from the modem 28 are selected and output to the transmission amplifier 21 as a transmission signal.

The transmission amplifier 21 and the reception amplifier 22 are connected to a predetermined line (not shown), for example, a public telephone line, and the transmission amplifier 21 amplifies the transmission signal input from the switching unit 23 and sends out the signal to the line. . The receiving amplifier 22
The received signal input from the line is amplified and output to the modem 28 and the tone detector 29.

Next, the operation of the present embodiment will be described. The facsimile apparatus 20 according to the present embodiment
When sending out a voice message stored in a voice message, the voice signal of the frequency component of the detected tone signal is converted from the voice signal of the voice message to improve the detection accuracy of the detected tone signal while suppressing the deterioration of the voice quality of the voice message. The feature is that it is removed and transmitted in the range.

That is, the facsimile machine 20 converts a voice message stored in the voice storage unit 30 into an analog voice signal by the voice reproduction unit 27 and then transmits the voice message when sending a voice message when receiving a call. At this time, the voice signal of the voice message is partially input to the tone detector 29 via the receiving amplifier 22 via the receiving amplifier 22. Therefore, if the voice signal of the voice message includes a voice signal having the same frequency as the frequency of the detection tone signal sent from the other party in a state satisfying the detection conditions, the tone detection unit 29 detects the voice signal as a detection tone. This results in a false detection of a signal.

Therefore, when transmitting a voice message, if the voice signal of the voice message contains the same frequency as the detected tone signal, the facsimile apparatus 20 suppresses the deterioration of the voice quality of the voice signal of the frequency. In addition, it is removed to the extent that erroneous detection can be appropriately prevented.

That is, the facsimile apparatus 20 outputs the audio signal converted by the audio reproducing section 27 to the band filter 26, the switching section 24, and the band detecting section 25, and the band filter 26 is inputted from the audio reproducing section 27. The frequency component of the detected tone signal is removed from the audio signal to be output to the switching unit 24.

Band detection section 25 detects whether or not the audio signal reproduced by audio reproduction section 27 contains the frequency component of the detected tone signal, and outputs the detection result to switching section 31 as a frequency detection signal. .

The control unit 31 controls the switching operation of the switching unit 24 via the band detecting unit 25 to control the sound while the band detecting unit 25 does not detect that the frequency component of the detected tone signal is included. An audio signal directly input from the reproduction unit 27 is selected and transmitted to the other party via the switching unit 23 and the transmission amplifier 21. When the band detecting unit 25 detects that the frequency component of the detected tone signal is included, the control unit 31 switches the switching unit 24 via the band detecting unit 25 for a predetermined time ta from the detection. Select the audio signal input from the audio reproduction unit 27, transmit it to the other party via the switching unit 23 and the transmission amplifier 21, and output a switching signal to the switching unit 24 to the band detection unit 25 when a predetermined time ta has elapsed. Then, the audio signal from which the frequency component of the detection tone signal input from the band-pass filter 26 has been removed is selected for a predetermined time tb and transmitted to the other party via the switching unit 23 and the transmission amplifier 21. The predetermined time ta and the predetermined time tb
Is the same as in the first embodiment.

Then, the control section 31 controls the switching operation of the switching section 24 by the control section 31, as shown in FIG. 2, as in the case of the first embodiment.

Therefore, the facsimile apparatus 20 sends a voice message from the transmission amplifier 21 using a voice signal from which the frequency component of the detected tone signal has been removed within a range where the tone detecting section 29 does not erroneously detect the detected tone signal. Even if the audio signal is input to the tone detector 29 via the receiving amplifier 22, the tone detector 29 does not erroneously detect this audio signal as the detected tone signal.

As a result, it is possible to appropriately and accurately detect only the detected tone signal transmitted from the destination via the line while suppressing the deterioration of the voice quality of the voice message.

Further, the facsimile apparatus 2 of the present embodiment
0 is within a time that satisfies the detection condition of the detected tone signal after the band detection unit 25 detects that the frequency component of the detected tone signal is included in the audio signal and a predetermined time has elapsed, Since the audio signal output from the bandpass filter 26 is selected after the elapse of the time ta, the detection condition is not satisfied only when the audio signal of the audio message satisfies the detection condition of the detected tone signal during reproduction of the audio message. The frequency component of the detected tone signal can be removed from the voice signal of the voice message in the range, the deterioration of the voice quality can be further suppressed, and the detected tone signal can be detected with high accuracy to detect the detected tone signal. False detection can be prevented.

FIG. 6 shows a third embodiment of the facsimile apparatus of the present invention.
FIG. 14 is a diagram showing the embodiment of the present invention, in which the tone detector has the function of the bandpass filter of the second embodiment.

This embodiment is applied to a facsimile machine similar to that of the second embodiment.
The same components as those of the facsimile machine 20 according to the second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 6 shows a third embodiment of the facsimile apparatus of the present invention.
FIG. 3 is a main part circuit block diagram of a facsimile apparatus 40 to which the embodiment is applied.

In FIG. 6, the facsimile machine 40
The transmission amplifier 21, the reception amplifier 22, the switching unit 23, the switching unit 24, the band detection unit 25,
It includes a bandpass filter 26, a sound reproducing unit 27, a modem 28, a sound storage unit 30, a control unit 31, and the like, and also includes a tone detection unit 41. The above main units are connected by a bus 32.

The tone detecting section 41 is connected to the receiving amplifier 22 and detects various tone signals, particularly detected tone signals, from the received signal input via the receiving amplifier 22, and outputs the detected result to the frequency detecting signal. Is output to the control unit 31. The control unit 31 performs various operations based on the detection result of the tone detection unit 41, in particular, a switching operation between a telephone mode and a facsimile mode and a voice message stored in the voice storage unit 30 in response to a voice message stored in the voice storage unit 30. DTMF sent from partner machine in response to key input
A facsimile information service for selectively transmitting various types of facsimile information (image information) according to a signal is provided.

The tone detector 41 also has a function as the band detector 25 of the second embodiment.
That is, the voice message sent from the transmission amplifier 21 to the destination is input to the tone detection unit 41 via the reception amplifier 22, and the detected tone signal ( DTMF signal or CNG signal) to detect whether or not a band component is included, and use the detection result as a frequency detection signal as a control unit 3
1 under the control of the control unit 31.
The switching signal for instructing the switching operation is output. Control unit 3
1 controls output of a switching signal that instructs a switching operation of the switching unit 24 that is output from the tone detecting unit 41 to the switching unit 24, based on the frequency detection signal from the tone detecting unit 41.

Next, the operation of the present embodiment will be described. The facsimile apparatus 40 according to the present embodiment
(1) detection of a detection tone signal sent from the other party;
It detects whether or not the detected tone signal is included in the voice signal of the voice message to be transmitted to the destination, and when transmitting the voice message stored in the voice storage unit 30, the detection is performed from the voice signal of the voice message. The feature is that the frequency components of the tone signal are removed and transmitted within a range that improves the detection accuracy of the detected tone signal while suppressing the deterioration of the voice quality of the voice message.

That is, the facsimile machine 40 converts the voice message stored in the voice storage unit 30 into an analog voice signal by the voice reproduction unit 27 and then transmits the voice message when sending a voice message when receiving a call. At this time, the voice signal of the voice message is partially input to the tone detector 41 via the receiving amplifier 22. Therefore, if the voice signal of the voice message includes a voice signal having the same frequency as the frequency of the detection tone signal sent from the other party in a state satisfying the detection conditions, the tone detection unit 29 detects the voice signal as a detection tone. This results in a false detection of a signal.

Therefore, when transmitting the voice message, if the voice signal of the voice message includes the same frequency as the detected tone signal, the facsimile apparatus 40 converts the frequency component of the detected tone signal from the voice signal to the voice quality. While suppressing the deterioration of the filter, it is removed to the extent that erroneous detection can be appropriately prevented.

That is, the facsimile apparatus 40 outputs the audio signal converted by the audio reproducing section 27 to the bandpass filter 26 and the switching section 24,
Removes the frequency component of the detected tone signal from the audio signal input from the audio reproduction unit 27 and outputs the signal to the switching unit 24.

Switching section 24 selects an audio signal directly input from audio reproduction section 27 and selects a switching section while tone switching section 24 does not input a switching signal to output an audio signal from bandpass filter 26. The data is transmitted to the destination via the transmission amplifier 23 and the transmission amplifier 21.

The voice signal of the voice message transmitted to the destination via the transmission amplifier 21 is also input to the tone detection unit 41 via the reception amplifier 22 and the tone detection unit 4
1 detects whether or not the frequency component of the detected tone signal is included in the input audio signal, and outputs the detection result to the control unit 31 as a frequency detection signal.

When the tone detecting section 41 detects that the frequency component of the detected tone signal is included, the control section 31 sends it to the switching section 24 via the tone detecting section 41 for a predetermined time ta after the detection. During this time, an audio signal input from the audio reproduction unit 27 is selected and transmitted to the other party via the switching unit 23 and the transmission amplifier 21. When a predetermined time ta elapses, the input from the bandpass filter 26 is performed only during the predetermined time tb. The audio signal from which the frequency component of the detected tone signal is removed is selected and transmitted to the other party via the switching unit 23 and the transmission amplifier 21. The predetermined time ta and the predetermined time t
b is the same as in the first embodiment.

Then, the switching section 24 is switched by the control section 31 as shown in FIG. 2, as in the first and second embodiments.

In this switching operation, when the switching unit 24 switches the audio signal transmitted through the switching unit 23 and the transmission amplifier 21 from the audio signal output from the audio reproduction unit 27 to the audio signal output from the bandpass filter 26, Even if the audio signal output from the audio reproduction unit 27 includes the frequency component of the detected tone signal, the audio signal of the audio message input to the tone detection unit 41 via the reception amplifier 22 includes the frequency of the detected tone signal. No components are included. However, when the detected tone signal is transmitted from the other party via the line, the switching unit 24 outputs the audio signal transmitted via the switching unit 23 and the transmission amplifier 21 to the audio reproduction unit 2.
Even when the audio signal output from the audio signal 7 is switched to the audio signal output from the bandpass filter 26, the tone detection unit 41 detects the frequency component of the detected tone signal.

Therefore, tone detecting section 41 can appropriately detect the detected tone signal sent from the destination, and the voice signal of the voice message transmitted to the destination includes the frequency component of the detected tone signal. It is possible to appropriately detect whether or not it has been performed.

As a result, the facsimile apparatus 40 sends a voice message based on the voice signal from which the frequency component of the detected tone signal has been removed from the transmission amplifier 21 within a range where the tone detecting section 29 does not erroneously detect the detected tone signal. Even if this audio signal is input to the tone detector 41 via the receiving amplifier 22, the tone detector 41 does not erroneously detect this audio signal as a detected tone signal.

Therefore, it is possible to detect only the detected tone signal transmitted from the other party via the line appropriately and accurately while suppressing the deterioration of the voice quality of the voice message, and to simplify the circuit configuration. And the facsimile machine 40 can be inexpensive.

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

[0104]

According to the facsimile apparatus of the first aspect of the present invention, when a call is received, a voice message is sent to the other party, and a detection tone signal of a predetermined frequency sent from the other party is set to a predetermined detection condition. Based on the detection, when providing various functions, the voice signal of the voice message input from the voice input unit detects whether the frequency component of the detected tone signal is included, according to the detection result,
The audio signal converted and output by the audio input unit and the audio signal output by the frequency component removing means for removing the frequency component of the detected tone signal from the audio signal converted and output by the audio input unit are selectively selected. Then, the voice signal from which the frequency component of the detected tone signal has been removed is stored in the voice storage means, and the voice signal stored in the voice storage means is transmitted to the other party as a voice message. Only when the frequency component of the detected tone signal is detected, the audio signal from which the frequency component of the detected tone signal is removed is stored,
It is possible to transmit the stored voice message to the other party at the time of an incoming call, suppress deterioration of voice quality, and detect a detection tone signal with high accuracy to prevent erroneous detection of the detection tone signal. Can be.

According to the facsimile apparatus of the second aspect of the present invention, when a call is received, a voice message is sent to the other party, and a detection tone signal of a predetermined frequency sent from the other party is determined based on a predetermined detection condition. When detecting and providing various functions, the voice message stored in the voice storage means is reproduced by the voice output unit and output as a voice signal, and the frequency of the detected tone signal is output to the voice signal output from the voice output unit. The frequency component of the detected tone signal is removed from the audio signal output from the audio output unit and the audio signal output from the audio output unit according to the detection result of the band detection unit that detects whether or not the component is included. And an audio signal output from the frequency component removing means, and selectively outputting the selected audio signal by the switching means, and removing the frequency component of the detected tone signal from the audio signal. Since the voice message is sent to the destination, the frequency component of the detected tone can be removed from the voice signal of the voice message and sent to the destination only when the frequency component of the detected tone is detected during playback of the voice message. In addition, it is possible to suppress the deterioration of the voice quality and detect the detected tone signal with high accuracy, thereby preventing the erroneous detection of the detected tone signal.

According to the facsimile apparatus of the present invention, after the switching means detects that the frequency component of the detected tone signal is included in the audio signal, the detection condition of the detected tone signal is detected. If the audio signal of the voice message satisfies the detection condition of the detected tone signal at the time of recording or playback of the voice message, the voice signal output by the frequency component removing means is selected within a time that satisfies Only the frequency component of the detected tone signal can be removed from the voice signal of the voice message within a range that does not satisfy the detection condition, and the deterioration of the voice quality can be further suppressed, and the detected tone signal can be accurately detected. To prevent erroneous detection of the detected tone signal.

[Brief description of the drawings]

FIG. 1 is a main part circuit block diagram of a facsimile apparatus to which a first embodiment of a facsimile apparatus of the present invention is applied.

FIG. 2 is a flowchart showing a voice switching control process performed by the facsimile apparatus of FIG. 1;

FIG. 3 is a diagram illustrating a control state of a switching signal and an output signal of a switching unit when a frequency component included in a voice message is shorter than times ta + tb and ta.

FIG. 4 is a diagram showing a control state of a switching signal and an output signal of a switching unit when a frequency component included in a voice message is longer than a time ta + tb.

FIG. 5 is a main part circuit block diagram of a facsimile apparatus to which a second embodiment of the facsimile apparatus of the present invention is applied.

FIG. 6 is a main part circuit block diagram of a facsimile apparatus to which a third embodiment of the facsimile apparatus of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 Voice reproduction part 3 Modem 4 Switching part 5 Transmission amplifier 6 Reception amplifier 7 Tone detection part 8 Microphone 9 Microphone amplifier 10 Band filter 11 Switching part 12 Band detection part 13 Voice synthesis part 14 Voice storage part 15 Control part 16 Bus REFERENCE SIGNS LIST 20 facsimile apparatus 21 transmission amplifier 22 reception amplifier 23 switching section 24 switching section 25 band detection section 26 band filter 27 voice reproduction section 28 modem 29 tone detection section 30 voice storage section 31 control section 32 bus 40 facsimile apparatus 41 tone detection section

Claims (3)

[Claims] When an incoming call is received, a predetermined voice message is transmitted to the other party, and a detection tone signal of a predetermined frequency sent from the other party is detected based on a predetermined detection condition to provide various functions. In a facsimile apparatus, a voice storage unit that stores a voice message to be sent to the destination, and a voice input unit that converts the voice message into a voice signal and outputs the voice message when a voice message to be stored in the voice storage unit is input. A frequency component removing unit configured to remove a frequency component of the detected tone signal from the audio signal output from the audio input unit; and a frequency component of the detected tone signal included in the audio signal output from the audio input unit. Band detecting means for detecting whether or not the sound signal is output, and outputting the sound signal output from the sound input unit and the frequency component removing means. Switching means for selectively selecting and outputting the audio signal, and controlling a switching operation of the switching means in accordance with a detection result of the band detecting means to convert a frequency component of the detected tone signal from the audio signal. A facsimile apparatus comprising: a control unit that stores the voice message of the removed voice signal in the voice storage unit. 2. When an incoming call is received, a predetermined voice message is sent to the other party, and a detection tone signal of a predetermined frequency sent from the other party is detected based on a predetermined detection condition to provide various functions. In a facsimile apparatus, a voice storage unit for storing a voice message to be sent to the destination, a voice output unit for reproducing the voice message stored in the voice storage unit and outputting the voice message as a voice signal, and the voice output unit Frequency component removing means for removing the frequency component of the detected tone signal from the audio signal output from the CPU, and determining whether the audio signal output from the audio output unit includes the frequency component of the detected tone signal. Band detecting means for detecting, and selecting between the audio signal output from the audio output unit and the audio signal output from the frequency component removing means. And switching means for selecting and outputting a,
Control means for controlling the switching operation of the switching means in accordance with the detection result of the band detection means to transmit a voice message of a voice signal obtained by removing a frequency component of the detection tone signal from the voice signal to the destination; A facsimile machine comprising: 3. The control unit according to claim 2, wherein said band detecting unit detects that said audio signal includes a frequency component of said detected tone signal, and thereafter, within a time satisfying said detection condition of said detected tone signal. 3. The facsimile apparatus according to claim 1, wherein after a lapse of a predetermined time, the switching means selects the audio signal output from the frequency component removing means.