JP3229124B2 - Communication device ring volume adjustment circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring volume control circuit for a communication device suitable for use in, for example, a pager, a radio telephone device, and the like.

[0002]

2. Description of the Related Art In recent years, portable pagers, wireless telephone devices, and the like have become widespread as communication devices, and are often used outdoors. When using these pagers and wireless telephone devices outdoors, the wearer should adjust the ring volume so that the surrounding noise is loud and the ringing sounds of the pagers and wireless telephone devices are not overlooked, especially during busy traffic. In many cases, the user operates the volume for use and adjusts it so that a ringing tone with a volume higher than that of a normal case is output.

In a ringing volume control circuit of a conventional communication device such as a portable pager or a radio telephone device, the volume of a ringing tone is fixed or is reduced for a few seconds after the ringing starts and then increased. Is set. Alternatively, a telephone device disclosed in Japanese Patent Application Laid-Open No. Hei 5-236071 is provided with a ring volume adjusting circuit for setting a ringing tone to gradually increase with time after an incoming call.

[0004]

Since the conventional ringing volume control circuit of a communication device is constructed as described above, the ringing volume can be adjusted by a volume control volume or the like according to the level of ambient noise. It is necessary to make adjustments, and if the adjustments are not made, there is a problem that a ringing tone due to an incoming call may be missed in a place where the surrounding noise is loud.

In the case where the ringing tone gradually increases with the lapse of time after receiving a call, as in the telephone device disclosed in Japanese Patent Application Laid-Open No. Hei 5-236071, the ringing tone may be finally missed. On the other hand, there is a problem that it is difficult to notice a ringing sound due to an incoming call in a place where the surrounding noise is high. On the other hand, in a quiet place where the surrounding noise is small, there is a problem that if it is released, a loud sound will be emitted more than necessary.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a ring volume control circuit of a communication apparatus capable of automatically adjusting a ring tone according to the level of ambient noise. And

[0007]

A ringing volume control circuit for a communication device according to the present invention includes a microphone for detecting ambient noise.
A speaker for outputting a ringing tone is provided in the call volume adjustment circuit of a communication apparatus for adjusting the volume of the intermittently outputted by ringing tone from the speaker when it detects an incoming signal, the output signal from the microphone An average value of the output signal during a ringing interruption period of a ringing sound intermittently output from the speaker based on the calculated average value.
The surrounding sound volume level detecting means for detecting a surrounding volume level, the call volume adjustment information for adjusting the volume of the ringing tone in response to the volume level of the surrounding, the circumferential
The duty of the pulse signal whose wave number is equal to the ringing frequency
And call volume adjustment information setting means for indicating the I ratio, the
Before adjusting the volume according to the duty ratio of the pulse signal
And a drive circuit for driving the serial speaker, said peripheral volume
Detection operation of the surrounding volume level by level detection means
And the ring volume by the ring volume adjustment information setting means.
Setting operation of the adjustment information and the speed by the driving circuit.
When the driving operation of the power is a series of operations,
Is repeated until the output stop operation is performed.
And stop when the output stop operation is performed.
It is characterized by being performed .

[0008]

The ringing volume adjusting circuit of the communication device according to the present invention detects and detects the surrounding volume level during the ringing interruption period of the ringing sound intermittently output from the speaker or immediately before the ringing sound is output. Ringing volume adjustment information corresponding to the surrounding volume level is set, and the ringing volume is automatically adjusted according to the detected surrounding volume level based on the set ringing volume adjustment information. Even so, it is possible to make the ringer surely and instantly hear the ringing tone.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a pager provided with a ringing volume adjusting circuit of the communication apparatus of the present embodiment.
In the figure, reference numeral 1 denotes an antenna for receiving a radio wave transmitted from a radio base station, reference numeral 2 denotes a high-frequency receiving unit, and reference numeral 3 denotes a decoder for decoding code information from a signal received by the high-frequency receiving unit 2. Reference numeral 4 denotes an ID ROM storing ID code information to be collated to identify whether or not the transmitted code information is information transmitted to itself. Reference numeral 5 denotes a microcomputer which stores the received code information. This is a system control unit that performs processing. The microcomputer 5 has a ROM 5a and a RAM 5b as is well known.

Reference numeral 6 denotes a microcomputer 5 for storing code information.
, A liquid crystal display unit for displaying the received and decoded data obtained by the processing, 7 is a key operation unit having various operation keys, 8 is a vibrator for notifying that there is an incoming call by mechanical vibration, 9 is 2 is a driving circuit of the speaker 10.

The driving circuit 9 outputs a loud ringing tone from the speaker 10 when the duty ratio of the supplied pulse signal is large, and outputs a low ringing tone from the speaker 10 when the duty ratio is small. Then, a speaker driving current of 2 KHz corresponding to the duty ratio is intermittently output to the speaker 10 at 0.5 second intervals for 0.5 seconds. Reference numeral 11 denotes a light-emitting diode for displaying an incoming call with light and for notifying other status indications with light.

Reference numeral 12 denotes a microphone for detecting ambient noise, 13 a low-pass filter for averaging an electric signal indicating the ambient noise level detected by the microphone 12, and 14 an analog / digital conversion of the output of the low-pass filter 13. A / D converter.

FIG. 2 shows a pulse signal having a repetition period of 1/2 × 10 ³ sec output from the microcomputer 5 to the drive circuit 9. FIG.
A speaker driving current of a frequency of 2 KHz which is intermittently output to the speaker 10 at 0.5 second intervals at 5 second intervals is shown. FIG. 4 is a table TB stored in the ROM 5a of the microcomputer 5, in which output pulse duty ratio data as ringing volume adjustment information for the surrounding volume level is stored. This output pulse duty ratio data is information for setting the duty ratio of the pulse signal shown in FIG.

Next, the operation will be described. FIG. 5 is a flowchart showing a pager ringing sound generation process when an incoming call is detected. The program shown in this flowchart is stored in the ROM 5a of the microcomputer 5. When there is an incoming call, the microcomputer 5 shifts to this ringing tone generation processing routine, and proceeds to step S1.
In step 2, the average of the surrounding volume level for 0.5 seconds is detected based on the ringing cutoff period of the ringing sound of the speaker 10 or the output of the microphone 12 immediately before the ringing sound is output. Then, in the subsequent step S2, the corresponding output pulse duty ratio data is read out with reference to the table TB shown in FIG. 4 based on the average value of the detected surrounding volume levels for 0.5 seconds. The average value of the surrounding volume level for 0.5 seconds and the corresponding output pulse duty ratio data are in a predetermined proportional relationship, and are set in advance so that the output pulse duty ratio increases as the average value of the surrounding volume level increases. Has been determined. The microcomputer 5 sets the duty ratio of the pulse signal to be output to the drive circuit 9 based on the read output pulse duty ratio data as shown in FIG.
In step S3, a pulse signal of 2 KHz with the set duty ratio is output to the drive circuit 9.

In the next step S4, a 2 KHz pulse signal having a duty ratio set according to the average value of the surrounding volume levels is output for 0.5 seconds. Further, step S
In step 5, it is determined whether or not a ringing tone output stop operation has been performed. If the ringing tone output stop operation has been performed, the process proceeds to step S6 to perform a ringing tone output stop process.
If the ringing tone output stop operation is not performed, the process returns to step S1, and the pulse signal output up to that time, ie, the ringing tone for 0.5 seconds shown in FIG. 3 of the ringing tone (ambient volume level detection period). The ambient volume level is detected again. As described above, the processes from step S1 to step S5 are repeated until the operation of stopping the output of the ringing tone is performed.

As described above, in this embodiment, the volume of the ringing tone output from the speaker 10 is automatically adjusted in accordance with the volume level of ambient noise and the like. Is output, and a low volume ringing tone is output when the noise is low, so that the wearer can reliably and immediately hear the ringing tone.

[0017]

As described above, according to the present invention, the ringing tone can be automatically adjusted according to the surrounding volume level.
There is an effect that the ringer can be reliably and immediately heard by the wearer even in a loud place. Also,
Even in a quiet place with no noise, the ringing sound is not unnecessarily loud and is effective.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a pager provided with a ring volume adjustment circuit of a communication device according to an embodiment of the present invention.

FIG. 2 is a waveform diagram showing a pulse signal output from a microcomputer of a pager having a ringing volume adjusting circuit of the communication device to a driving circuit according to an embodiment of the present invention.

FIG. 3 is a block diagram of a communication apparatus according to an embodiment of the present invention, in which a pager drive circuit including a ringer volume control circuit is intermittently output to a speaker at 0.5 second intervals for 0.5 seconds;
It is a waveform diagram which shows the speaker drive current of KHz.

FIG. 4 is an explanatory view showing a table stored in a ROM of a pager provided with a ringing volume control circuit of the communication device according to one embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of a ringing tone generation process in the ringing tone volume adjusting circuit of the communication device according to one embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 5 Microcomputer (ring volume adjustment information setting unit, ring volume adjusting unit) 10 Speaker 12 Microphone (ambient volume level detecting unit) 13 Low-pass filter 14 A / D converter

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B ⁷ /24-7/26 H04M 1/00 H04Q 7/00-7/38

Claims (1)

(57) [Claims] 1. A microphone for detecting ambient noise and a ringing sound
A speaker is provided for outputting, in call volume adjustment circuit of a communication apparatus for adjusting the volume of the intermittently outputted by ringing tone from the speaker when it detects an incoming signal, based on the output signal from the microphone, In the ringing interruption period of the ringing sound output intermittently from the speaker
Ambient volume level detecting means for determining an average value of the output signal and detecting the determined average value as a surrounding volume level; ringing volume adjustment for adjusting the volume of the ringing tone corresponding to the surrounding volume level Information that the frequency
The duty ratio of the pulse signal equal to the frequency of the sound
And call volume adjustment information setting means for indicating I, so that a sound volume in accordance with the duty ratio of the pulse signal
A driving circuit for driving the speaker, and the surrounding volume level detected by the surrounding volume level detecting means.
And the ringing volume adjustment information setting means.
Setting operation of the ringing volume adjustment information,
When the speaker driving operation is a series of operations,
The series of operations described above must be performed before the output stop operation is performed.
And the output stop operation is performed.
A ringing volume control circuit for a communication device, which is stopped when a call is made.