JPH0715489A - Telephone set - Google Patents

Abstract

PURPOSE:To hear a call tone more clearly by measuring surrounding noise from the arrival of a call to a concerned telephone set till an off-hook state and outputting a call tone for each prescribed period in a tone volume depending on the result of measurement thereby allowing a called party to hear the call tone more clearly. CONSTITUTION:A microcomputer 11 measures surrounding noise of a concerned telephone set at all times according to a program stored in a memory 10. That is, the surrounding noise inputted from a monitor microphone 8 is converted into a noise signal by a noise signal conversion circuit 9 and inputted to the microcomputer 11 as noise information. Then the noise information is confirmed not in a dialing state nor in a busy state, and a noise signal conversion table 15 of the memory 10 is referenced to correct the noise information. The noise information is averaged for each prescribed time and a gain variable adjustment circuit 5 adjusts a proper gain. Then a call tone is outputted for each prescribed period in a tone volume in response to the averaged output just before the arrival of a call in response to the arrival of the call to the concerned telephone set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone, and more particularly to adjusting the volume of its ringing tone.

[0002]

2. Description of the Related Art There is a technique disclosed in Japanese Unexamined Patent Publication No. 2-121446 as a technique for outputting a ringing tone according to the environment when the noise around the telephone changes significantly. This will be described with reference to FIG.

In the figure, a telephone connected to a subscriber circuit 12 includes a telephone circuit 1, a transmission / reception circuit 2, a hook switch 3, and a ringing tone generating circuit 4 for generating a ringing tone.
A gain variable adjustment circuit 5 for adjusting the volume gain of the generated ringing tone and a speaker 6 for outputting the adjusted ringing tone as voice are provided.

The features of this conventional telephone are:
A monitor microphone 8 that is driven by a call signal detection circuit 7 that detects a call signal that is input from the hook switch 3 when an incoming call is received, and a noise output from the monitor microphone 8 that measures the amount of noise around the telephone. A noise signal conversion circuit 9 for converting the volume of the noise into an electric signal corresponding to the volume of the gain variable adjustment circuit 5 according to the electric signal transmitted by the noise signal conversion circuit 9 when the volume of the surrounding noise is large. A microprocessor 11 for determining a control signal for controlling the gain by referring to the memory 10 and increasing the volume of the ringing tone transmitted from the speaker 6.

[0005]

In the above-mentioned conventional telephone, since the ambient noise is measured in response to an incoming call and the volume of the ringing tone is set to a fixed value, the ringing tone is output. If there is a change in the ambient noise while the user is in the middle, there is a drawback that the volume of the ringing tone cannot be changed according to the change. For example, if a loud noise happens to occur during noise measurement after an incoming call, or if it happens to be quiet, on the contrary, an abnormally loud ringing tone is output, or a ringing tone that is too small to be heard is output. was there.

The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a telephone in which a called party can hear a ringing tone more clearly.

[0007]

The telephone according to the present invention comprises:
It is characterized in that it has a measuring means for continuously measuring ambient noise from the time of the incoming call to the own telephone until it goes into an off-hook state, and a ringing tone outputting means for outputting a ringing tone at a predetermined cycle at a volume corresponding to the measurement result. And

Another telephone according to the present invention responds to an incoming call to the own telephone by a measuring means for constantly measuring the noise around the own telephone, an averaging means for averaging the measurement results every predetermined time. And a ringing tone output unit that outputs a ringing tone at a predetermined cycle at a volume corresponding to the output of the averaging unit immediately before the incoming call.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a telephone according to the present invention, and the same parts as those in FIG. 3 are designated by the same reference numerals. In the figure, a telephone according to an embodiment of the present invention includes a hook switch 3, a handset 2, a telephone circuit 1 connected to the hook switch 3 and the handset 2 to realize a call and output call information, and dial information. The dial unit 13 for outputting, the ringing signal detecting circuit 7 for detecting ringing signal input from the subscriber line 12 and outputting ringing signal information, and the ringing tone generating circuit 4 which is the source of ringing tone are A cycle detection circuit 14 that detects a cycle and outputs cycle information is configured.

In the telephone of this embodiment, the variable gain adjusting circuit 5 for adjusting the gain of the ringing tone and the variable gain adjusting circuit 5 are used.
A speaker 6 connected to the monitor microphone 8, a monitor microphone 8, a noise signal conversion circuit 9 that integrates and averages electric signals from the monitor microphone 8 and outputs a noise signal, and a noise signal conversion table 1
5 and a memory 10 having a built-in program, and the gain adjustment of the variable gain modulation circuit 5 is performed based on the program in which the call information, dial information, ringing signal information, cycle information, and noise information are input and stored in the memory 10. It is configured to include a microcomputer 11.

The operation of this embodiment having such a configuration will be described with reference to FIG. FIG. 2 is a flow chart showing a processing operation procedure by the program stored in the memory 10, and the microcomputer 11 constantly measures the noise around the own machine according to this flow chart.

First, the ambient noise input from the monitor microphone 8 is converted into a noise signal in the noise signal conversion circuit 9 and input to the microcomputer 11 as noise information (step 21).

Here, it is judged whether or not dial information is inputted from the dial section 13 (step 22 →
23). If dialing is not in progress, it is then determined whether or not the call information is input from the handset 2 (steps 24 → 25). If the call is not in progress, the noise information is confirmed (step 26).

On the other hand, when the device itself is dialing or in a call, a sound different from the ambient noise such as a push-button pressing sound or a voice caused by a call is included, so that the measurement accuracy is poor. Therefore, in that case, the noise information is corrected by referring to the noise signal conversion table 15 stored in advance in the memory 10.

When the player is dialing, such as when the push button is being pressed, it is necessary to subtract the sound generated by the pressing from the input from the monitor microphone 8 to obtain the ambient noise correctly, and therefore the memory 10 is used. The noise signal conversion table 15 is referred to (step 23 → 3).
1). Thereby, the noise information is confirmed (step 31).
→ 26).

Further, when the own device is in a call, it is necessary to subtract the call voice from the input from the monitor microphone 8 to obtain the ambient noise correctly, and therefore the memory 10 is used.
The noise signal conversion table 15 is referred to (step 25 → 32). As a result, the noise information is confirmed (step 32 → 26).

The noise signal conversion table 15 is created by measuring the output level of the monitor microphone 8 when the push button is pressed or a call is made in a state where there is no ambient noise.

When the noise information is determined, it is converted into gain information (step 27), and the gain information according to the noise information is output to the gain variable adjusting circuit 5 and adjusted to an appropriate gain (step 28). For example, when the noise information indicates that the ambient noise is large, the gain information that makes the volume of the ringing tone high is output, and when the ambient noise is small, the volume of the ringing tone is made low. The gain information to be output is output. That is, the magnitude of the ambient noise and the gain information have a substantially proportional relationship, but may be set to an appropriate value according to the installation location of the telephone, and a conversion table or the like may be created in advance.

In this case, the noise information is averaged every predetermined time (for example, every 5 minutes), and the gain information according to the value of this average output is output to the gain variable adjusting circuit 5. In addition,
The gain information is updated every predetermined time, and the average output immediately before the incoming call is output.

Next, it is judged whether or not the incoming call information is input (step 29 → 30), and if the incoming call is not received, the noise information input process is performed again (step 30 → 21).
If an incoming call is being received, it is determined whether or not the cycle information indicating the cycle of the ring back tone is input from the ring back tone cycle detection circuit 14 (steps 30 → 33).

If the ringing tone is in the output state,
Since the ringing tone is input from the monitor microphone 8, the input of noise information is suppressed (steps 33 → 34 →
33). When the ringing tone is silent, noise information is input (step 33 → 34 → 21). Note that, in general, the ringing tone has a cycle of being silent for 2 seconds after being sounded for 1 second, and the noise information is input only in the silent state.

As described above, when the ringing tone is in the silent state, the noise is measured and the gain is adjusted, and when the ringing tone is in the output state, the noise measurement is suppressed and the gain is not adjusted. To be seen.

In short, in the telephone of this embodiment, the noise around the device itself is constantly measured, the measurement results are averaged at every predetermined time, and the average output immediately before the call is received in response to the call to the phone. That is, the ringing tone is output at a predetermined volume for each predetermined period.

Further, when the own device is dialing or talking, the measurement result is corrected, and if there is a ringing tone, the input of noise information is suppressed, so the volume of the ringing tone is optimized. Therefore, the called party can clearly hear the ringing tone.

Since the ambient noise measurement results are averaged, it is not always necessary to perform correction processing according to the dial tone or the call tone during dialing or during a call.

Further, even if an incoming call to the own telephone is answered, ambient noise is continuously measured from the incoming call to the off-hook state, and a ring tone is output at a volume corresponding to the measurement result, the volume is fixed. It is obvious that, unlike the conventional telephone, the volume of the ringing tone can be changed according to the change of the ambient noise during the ringing tone output.

[0028]

As described above, according to the present invention, by continuously measuring the ambient noise from the time of the incoming call to the own machine to the off-hook state, and outputting the ringing tone at the volume according to the measurement result, If the ambient noise changes during the output of the ringing tone, the volume of the ringing tone can be changed according to the change.

Further, the noise around the device itself is continuously measured, the measurement results are averaged at predetermined time intervals, and in response to an incoming call to the device itself, a ringing tone is produced at a volume corresponding to the average value immediately before the incoming call. Is output, the called party can more clearly hear the ringing tone.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a telephone according to an embodiment of the present invention.

2 is a flowchart showing the operation of the telephone of FIG.

FIG. 3 is a block diagram showing a configuration of a conventional telephone.

[Explanation of symbols]

 1 Telephone Circuit 2 Handset 3 Hook Switch 4 Ringer Generation Circuit 5 Gain Adjusting Circuit 6 Speaker 7 Ringer Signal Detection Circuit 8 Monitor Microphone 9 Noise Signal Converter Circuit 10 Memory 11 Microcomputer 12 Subscriber Circuit 13 Dial Section 14 Ringer Cycle Detection circuit 15 Noise signal conversion table

Claims (4)

[Claims] 1. A measuring means for continuously measuring ambient noise from the time of an incoming call to the own telephone until an off-hook state, and a ringing tone outputting means for outputting a ringing tone at a predetermined period at a volume corresponding to the measurement result. A telephone having: 2. A measuring means for constantly measuring the noise around the own device, an averaging means for averaging the measurement results at predetermined time intervals, and in response to an incoming call to the own telephone set, immediately before the incoming call. A telephone having a ringing tone output unit that outputs a ringing tone at a predetermined cycle at a volume corresponding to the output of the averaging unit. 3. The telephone according to claim 1, further comprising a measurement inhibiting means for inhibiting the measurement by the measuring means during the period when the ringing tone is being output. 4. A correction means for correcting the measurement result according to a dial sound of the own telephone when dialing or a call sound during a call.
Or the telephone set forth in item 3.