JPH0243853A - Terminal equipment - Google Patents

Abstract

PURPOSE:To generate an incoming tone offering ease of hearing at all times by varying tone volume and tone color of the incoming tone properly in response to the change in the magnitude of surrounding noise. CONSTITUTION:The equipment is provided with a microphone 5 detecting the surrounding tone of the terminal equipment, a processing circuit 8 outputting a signal representing the amplitude of an output signal of the microphone 5, and incoming tone generating circuits 2, 3, 10, 11 generating incoming tone signals with different frequency and amplitude in response to the level of the signal outputted from the processing circuit 8. When the surrounding noise of the terminal equipment is small, the incoming tone with low tone color and small sound volume is sounded from a speaker 4 and when the surrounding noise is large conversely, the incoming tone with high tone color and large sound volume is sounded from the speaker 4. Thus, the incoming tone offering ease of hearing is obtained at all times independently of the magnitude of the surrounding noise.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal device, such as a telephone, which emits a ringing tone when receiving a call.

[Conventional technology]

Conventionally, on terminal devices such as telephones, the volume and tone of the ringtone are semi-fixed by the volume and switch installed on the terminal device, and the ringtone remains at a constant volume and tone unless these settings are changed. It was drooping.

[Problem to be solved by the invention]

In other words, in conventional terminal devices, the volume and tone of the ringtone are kept constant regardless of the external environment such as ambient noise, so for example, when the ambient noise is loud, the ringtone is masked by the noise and becomes difficult to hear. On the other hand, when the surroundings are quiet, such as at night, the loudness is too loud and becomes a nuisance.

SUMMARY OF THE INVENTION An object of the present invention is to solve such problems and provide a terminal device in which the volume and tone of a ringtone appropriately change in response to changes in the level of ambient noise.

[Means to solve the problem]

The present invention provides a terminal device that generates a ringtone when receiving a call, which includes: a microphone that detects sounds surrounding the terminal device; a processing circuit that outputs a signal representing the magnitude of an output signal of the microphone; and an output signal of the processing circuit. and a ring tone generation circuit that generates a ring tone signal having a different frequency and amplitude depending on the magnitude of the signal.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a part of an embodiment of a terminal device according to the present invention.

The line interface 1 is connected to a higher-level device through a line, and outputs ringtone on/off control information that instructs to generate or stop a ringtone depending on whether there is an incoming call from the higher-level device. The audible sound generation circuit 2 generates an audible sound signal based on this control information, and also changes the frequency of the audible sound signal based on the control information from the timbre switching control information creation circuit IO. The variable gain amplifier 3 changes its amplification degree based on the control information from the volume switching control information creation circuit 11, amplifies the audible sound signal from the audible sound generation circuit 2, and outputs it to the speaker 4.

The microphone 5 detects ambient noise and outputs an electrical signal thereof. The auditory sensation correction filter 6 is for correcting the gap between the electrical signal from the microphone 5 and human auditory sensation. The rectifier circuit 7 rectifies the output signal of the filter 6, and the average value calculation circuit 8 calculates the average value of the rectified signal and outputs the signal. The determination circuit 9 operates only when the line interface 1 outputs a control signal instructing to stop the ringtone, determines the level of the output signal of the arithmetic circuit 8, and sends the result to the tone switching control information creation circuit 10 and It is given to the volume switching control information creation circuit 11. These control information creation circuits 1
0.11 outputs control information specifying the tone of the ringtone and control information specifying the volume of the ringtone, respectively, based on the results of the determination circuit 9.

In the above configuration, the hearing correction filter 6, the rectifier circuit 7
, and the average value calculation circuit 8 constitute a processing circuit that outputs a signal representing the magnitude of the output signal of the microphone 5, and the audible sound generation circuit 2, variable gain amplifier 3, determination circuit 9, and control information creation circuit 10 11 constitutes a ring tone generation circuit which generates a ring tone signal having a different frequency and amplitude depending on the magnitude of the signal outputted from the processing circuit.

Next, the operation will be explained. Ambient noise of the terminal device is detected by microphone 5.
The electrical signal is frequency-corrected by a filter 6 and then rectified by a rectifier circuit 7. The average value calculation circuit calculates the average value of the signals from the rectifier circuit 7 and outputs the resulting signal.

At this stage, the ambient noise has been converted into a quantitative value, and the output signal of the arithmetic circuit 8 represents the magnitude of the ambient noise.

Here, if there is no incoming call from the host device and the line interface 1 is outputting control information instructing to stop the ringtone, the determination circuit 9 determines the level of the output signal of the arithmetic circuit 8, and the result is is output to the control information creation circuit 10.11. The reason why the judgment circuit 9 is configured to operate only when there is no incoming call is to prevent the ring tone generated by the terminal device itself from reaching the microphone 5 and causing the judgment circuit 9 to incorrectly judge the level of ambient noise. This is to prevent this.

Based on the determination result of the determination circuit 9, the timbre switching control information creation circuit 10 generates control information that instructs a low frequency when the ambient noise is small, and conversely, generates control information that instructs a high frequency when the ambient noise is large. Output. Also, based on the determination result of the determination circuit 9, the volume switching control information creation circuit 11 outputs control information that instructs a low volume when the ambient noise is low, and conversely, outputs control information that instructs a high volume when the ambient noise is large. Outputs control information.

In this state, when there is an incoming call from the host device and the line interface 1 outputs control information instructing the generation of the incoming call, the judgment circuit 9 stops operating, and the audible sound generating circuit 2 starts operating and receives the incoming call. Generate a sound signal. At this time, the audible sound generation circuit 2 determines the frequency of the ring tone signal based on the control information from the control information creation circuit 10. The ringtone signal generated by the audible sound generation circuit 2 is input to the variable gain amplifier 3, and the amplifier 3 amplifies this signal with an amplification degree based on the control information from the control information generation circuit 11 and outputs it. Sound 4.

Due to this operation, when the ambient noise of the terminal device is low, a ringtone with a low tone and low volume is emitted from the speaker 4, and conversely, when the ambient noise is large, a ringtone with a high tone and high volume is emitted. is emitted from speaker 4. As a result, a ringtone that is always easy to hear is obtained regardless of the level of ambient noise.

〔Effect of the invention〕

As explained above, the present invention provides a terminal device that emits a ringtone when receiving a call, which includes a microphone that detects sounds surrounding the terminal device, a processing circuit that outputs a signal representing the magnitude of the output signal of the microphone, and a processing circuit that outputs a signal representing the magnitude of the output signal of the microphone. and a ring tone generating circuit that generates a ring tone signal having a different frequency and amplitude depending on the magnitude of the signal output by the processing circuit.

Therefore, according to the present invention, it is possible to realize a terminal device that changes the volume and tone of a ringtone depending on the level of ambient noise, and always emits a ringtone that is easily interrupted.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a terminal device of the present invention. 1... Line interface Audible sound generation circuit Variable gain amplifier Speaker microphone Hearing correction filter Rectifier circuit Average value calculation circuit Judgment circuit Tone switching control information creation circuit Volume switching control information creation circuit

Claims (1)

[Claims] (1) In a terminal device that generates a ringtone when receiving a call, there is a microphone that detects sounds around the terminal device, a processing circuit that outputs a signal representing the magnitude of the output signal of this microphone, and a signal that this processing circuit outputs. A terminal device comprising: a ringtone generation circuit that generates a ringtone signal having a different frequency and amplitude depending on the magnitude of the signal.