JP2002185571A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable telephone set in which an incoming call tone speaker requiring a large volume and a calling speaker not requiring a large volume can be used in common in a single speaker. SOLUTION: The telephone set is provided with an incoming call tone output circuit 531 for outputting an audio signal, an incoming call tone volume limiting circuit (532, 533 and 534) for limiting the volume of the incoming call tone represented by an output signal of the circuit 531, and a single speaker 57 for emitting sound according to an audio signal of a speaking voice or an output signals of the circuits (532, 533 and 534). When the volume of the incoming call tone represented by the output signal of the circuit 531 exceeds a reference volume continuously, the circuits (532, 533 and 534) limit the increase speed of the volume exceeding the reference volume.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone device, and more particularly to a portable telephone device in which a single speaker is used for a speaker that emits a call sound or a ring tone. In this specification, the term "mobile phone device" includes a PHS (Personal Handyphone System) in addition to a so-called mobile phone.

[0002]

2. Description of the Related Art In a conventional portable telephone device, when a ring tone that requires a high volume and a call sound that does not generate a high volume are realized by the same speaker, the caller approaches the speaker. If a large volume ringtone sounds in this state, there is a risk of damaging the eardrum and the like. In order to avoid such a problem, 1) the speaker for the call sound and the speaker for the ring tone are separately attached to the main body of the portable telephone device. 2) Limit the maximum ringing volume to a volume that does not impair the eardrum or the like. 3) While ringing, gradually increase the ring volume. It has been proposed to implement such means alone or in combination of two or more.

[0003]

However, each of the above-mentioned prior arts has the following disadvantages. That is, 1) the method of separately mounting the speaker for the call sound and the speaker for the ringtone separately and independently on the main body of the portable telephone device is an effective measure for preventing the trouble such as the eardrum,
There is a problem in that the cost for the two speakers is required, and it is necessary to secure a space for two speakers in the main body of the mobile phone device.

[0004] In addition, when the means for limiting the maximum ringing volume to a volume that does not impair the eardrum or the like is used, there is a problem that a sufficient ringing volume cannot be obtained in many cases. Further, 3) the case of using a means of gradually increasing the incoming call volume during a call is used. In some cases, the designation of the gradually increasing incoming call volume is made by the end user or by the provider of the mobile phone system. In either case, there is no complete workaround for damage to the eardrum or the like.

[0005] Because, as seen in the ringtones used as ringtones, which have become popular in recent years, the end customer can freely select and create ringtones, and the provider of the portable telephone system can adjust the ringtone volume. Because you cannot control the change in As a specific example that cannot be avoided for obstacles to the eardrum, etc., "Minimum volume (silence) in the song itself
From the maximum to the maximum volume "," when the recorded sound is used as a ringtone, and when there is a change from silence to the maximum volume ", and the like. The present invention has been made in view of such circumstances, and a portable speaker in which a single speaker can share a ring tone speaker that requires a high volume and a call speaker that does not require a high volume. It is intended to provide a telephone device.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a single speaker is used for a call sound speaker and a ring tone speaker, and the volume of the ring tone is reduced. When the reference volume is continuously exceeded, the rate of increase of the volume exceeding the reference volume is limited.

Further, according to the present invention, there is provided a ring tone output circuit for outputting a ring tone signal, a ring tone volume limiting circuit for limiting the volume of the ring tone indicated by the output signal of the ring tone output circuit, and a call tone. And a single speaker that emits a sound based on the output signal of the ring tone limiting circuit, wherein the ring tone volume limiting circuit receives an incoming call indicated by the output signal of the ring tone output circuit. When the volume of the sound continuously exceeds the reference volume, the rate of increase of the volume exceeding the reference sound is limited.

[0008] Further, the invention described in claim 3 is based on claim 2.
In the mobile phone device according to the above, the ringtone limiting circuit, when the volume of the ringtone indicated by the output signal of the ringtone output circuit changes from a state below the reference volume to a state above the reference volume, the maximum volume It is characterized in that it is forcibly attenuated to a reference volume or less.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an electrical configuration of a mobile phone device according to an embodiment of the present invention. In FIG. 1, a mobile phone device 1 has a CPU (Central Processing Unit) 40 that controls each unit of the mobile phone device 1 by executing a telephone function program and other programs.
A ROM 42 storing fixed data such as various programs and music data, a RAM 44 serving as a readable and writable storage element, and a communication unit 46 for transmitting and receiving data to and from an external communication device via the antenna 2. , An input unit 48 having various keys such as numeric keys, a key buffer 50 for temporarily storing key setting data input from the input unit 48, and a display unit 52 for displaying various data.

The ROM 42 stores various telephone function programs and control programs executed by the CPU 40 at the time of transmission and reception, as well as preset music data for notifying the reception by a melody and other various fixed data. I have.

An arbitrary user setting data storage area, a work area of the CPU 40, and the like are set in the RAM 44. The communication unit 46 has a function of demodulating a signal received by the antenna 2, modulating a signal to be transmitted, and transmitting the modulated signal from the antenna 2. The input unit 48 provided on the main body of the mobile phone device includes a start key (corresponding to a call key) used for receiving a call, an end key used for ending the call, a numerical key (also used as a character key), and , # Key (also serves as a cursor key), * key (also serves as a cursor key), etc.
F (function) key used when setting various functions,
A power key for instructing power on / off, a clear key for releasing various settings, and the like are provided.

The display section 52 displays character information of a sentence created at the time of sending an e-mail, various data including the contents of various menus, etc., as well as detailed contents thereof. Further, the mobile phone device 1 includes a voice processing unit (CODER / DECODER) 53 and a microphone 56.
, A speaker 57 that is used for both a ring tone and a call, and a vibrator 60.

The voice processing unit 53 includes a coding unit (CODER) as a coding unit, a decoding unit (DECODER) as a decoding unit, and an output stage for outputting a call sound signal or a ringtone signal to the speaker 57. Circuit 53A, decodes the audio signal demodulated by the communication unit 46, outputs the signal to the speaker 57 through the output stage circuit 53A, and compresses the audio signal for transmission input from the microphone 56. The data is encoded and output to the communication unit 46. Also, when receiving a call,
The tone data is read from the ROM 42, and the output stage circuit 5
The music that is output to the speaker 57 via 3A and notifies the incoming call is emitted from the speaker 57.

CPU 40, ROM 42, RAM 44
, A communication unit 46, and an input unit 4 via a key buffer 50.
8, the display unit 52, the audio processing unit 53, and the vibrator 60 are mutually connected via a bus 70.

Next, a specific configuration of the output stage circuit 53A is shown in FIG.
Shown in In the figure, an output stage circuit 53A takes in a decoded audio signal output from a decoding unit (DECODER) and reads out from a ROM 42 a speech sound output circuit 530 that outputs the audio signal to a mixer and amplifier circuit 535. A ring tone output circuit 531 for outputting a music signal reproduced based on musical tone data as a ring tone signal, and a delay circuit 53 for delaying the output signal of the ring tone output circuit 531 for a predetermined time.
2, a volume limiting circuit 533 that specifies the amount of attenuation of the output signal of the ringtone output circuit 531, an attenuation circuit 534 that attenuates the output signal of the delay circuit 532 by the amount of attenuation specified by the volume limiting circuit 533, Mixer and amplifier circuit 5 for amplifying the output signal of sound output circuit 530 to a predetermined level
35. Here, the delay circuit 532, the volume limit circuit 533, and the attenuation circuit 534 constitute a ring volume limit circuit of the present invention. In addition, the volume limiting circuit 533
Comprises a CPU, a ROM, a RAM, an input / output interface, and the like.

The delay circuit 532 determines the time required for the volume limit circuit 533 to determine the limit value (attenuation) of the volume.
In other words, this circuit delays the output of the ringtone output to the mixer and amplifier circuit 535 by the time interval Int at which the volume restriction process is performed. The decay circuit 534 is used for the period I
Attenuation amount C updated by the volume limiting circuit 533 every nt
The volume of the ringtone output from the delay circuit 532 is attenuated by omp. Here, the level of the input signal of the attenuation circuit 534 is Sin, and the level of the output signal of the attenuation circuit 534 is Sou.
Assuming that t, the attenuation amount Comp becomes Comp = −20 log (Sout / Sin) [dB].

Next, the operation of the volume control circuit in the portable telephone device according to the present invention will be described with reference to the flowchart of FIG. In the figure, first, in step 100, it is determined whether or not the sound volume limiting operation is being performed by setting the attenuation amount Comp to the maximum value (max), resetting the timer T for measuring the time for executing the sound volume limiting process to the reset state. To set a reset limit to a reset state, a reference volume LL serving as a criterion for determining whether or not the volume is to be subject to volume restriction, a time interval Int for performing the volume restriction process, and a volume of the ringtone gradually increased. Volume step width Step
Initialize. The flag Limit is set to “1”.
Indicates a state in which the volume limiting operation is being performed, and a reset state “0” indicates a state in which the volume limiting operation is not performed.

Here, as the reference volume LL, for example, the maximum value of the call volume output is set as a guide. In addition, the time interval Int at which the volume limiting process is performed and the volume step width Step when gradually increasing the volume of the ringtone are determined by the caller taking appropriate measures to increase the volume, for example, by moving the ear away from the speaker 57 or the like. To satisfy the conflicting requirements between the requirement to secure enough time to perform the above procedure and the requirement to shorten the volume limit time and increase the volume of the ringtone early so that the ringtone can be recognized quickly. I do.

Next, in step 101, the timer T is updated and the peak value Peak of the volume is scanned, and in the next step 102, whether the measured time of the timer T has reached the time interval Int for performing the volume restriction process. It is determined whether or not. By repeating the processing of steps 101 and 102, the volume limiting circuit 533 allows the ring tone output circuit 531
The peak value Peak of the ringtone output signal output from the device is recorded for a predetermined time Int. When the time measured by the timer T reaches the predetermined time Int, the timer T is reset (step 103), and in step 104, the magnitude of the peak value Peak of the volume of the ring tone within the predetermined time Int is compared with the reference volume LL. It is determined whether Peak> LL.

If the determination in step 104 is negative,
That is, if it is determined that Peak ≦ LL,
The process proceeds to step 108, where the flag Li
mit is reset, the attenuation amount Comp set in the attenuation circuit 534 is set to Comp = 0, and the process returns to step 101. If the determination in step 104 is affirmative, that is, if it is determined that Peak> LL, it is determined in step 105 whether the flag Limit is in a reset state.

If it is determined in step 105 that the flag Limit is in the reset state, step 109
To set the flag Limit and the attenuation amount Co
mp is set to (Peak-LL), and the process returns to step 101. That is, when the peak value Peak of the volume indicated by the ring tone signal input to the volume limiting circuit 533 in a state where the volume limiting operation is not performed exceeds the reference volume LL, the volume of the ring tone is forcibly set as the reference. The attenuation amount Comp is set so as to attenuate the sound volume LL or lower.

On the other hand, at step 105, the flag Limit
Is not in the reset state, it is determined in step 106 whether Comp-Step> 0, in other words, the attenuation amount Comp is larger than the volume step width Step when the volume of the ring tone is gradually increased. Is determined. If it is determined in step 106 that Comp−Step> 0, then in step 107 the attenuation amount Comp is determined.
Is Comp-Step, and the volume step width St
By decreasing the amount of attenuation by ep, the volume of the ringtone is increased, and the process returns to step 101. If it is determined in step 106 that Comp-Step ≦ 0, the attenuation amount Comp is set to Comp = 0 in step 110, and the process returns to step 101. As described above, when the volume of the ringtone continuously exceeds the reference volume, the processing of steps 101 to 107 is repeated to limit the increasing speed of the volume exceeding the reference volume.

According to the portable telephone device according to the embodiment of the present invention, a single speaker shares a speaker that emits a call sound or a ring tone based on an audio signal of a call sound or a ring tone signal, In addition, when the volume of the ringtone continuously exceeds the reference volume, the rate of increase of the volume exceeding the reference volume is limited, so that a large volume is required without disturbing the user's eardrum and the like. A single speaker can be used for both a ring tone speaker and a call tone speaker that does not require a large volume.

Further, according to the portable telephone device according to the embodiment of the present invention, when the volume of the ring tone changes from a state below the reference volume to a state above the reference volume, the maximum volume is forced to be below the reference volume. In order to limit the maximum volume to the reference value forcibly from the ring tone output circuit, even if the ring tone output circuit suddenly outputs a ring tone signal that exceeds the reference volume , The sound volume higher than the reference value is not output from the speaker.

[0025]

According to the first aspect of the present invention, when a single speaker is used for both the call sound speaker and the ringtone speaker, and the volume of the ringtone continuously exceeds the reference volume. In this case, the rate of increase of the volume exceeding the reference volume is limited, so that a ring tone speaker that requires a high volume and a call tone that does not require a high volume are provided without impairing the user's eardrum, etc. Speaker can be shared with a single speaker.

According to the second aspect of the present invention, a ring tone output circuit for outputting a ring tone signal, a ring tone volume limiting circuit for limiting the volume of the ring tone indicated by the output signal of the ring tone output circuit, And a single speaker that emits a sound based on the output signal of the ring tone limiting circuit, wherein the ring tone volume limiting circuit receives an incoming call indicated by the output signal of the ring tone output circuit. If the volume of the sound continuously exceeds the reference volume, the rate of increase of the volume exceeding the reference sound is limited, so if a ring tone signal of a large volume exceeding the reference volume is continuously output from the ring tone output circuit. Thus, the amount of attenuation of the ring tone signal gradually decreases, and a loud sound is emitted from the speaker. Therefore, since the user can take an appropriate action such as taking his / her ear away from the speaker from the point in time when the ringtone starts to be emitted, a large volume can be secured without disturbing the user's eardrum and the like. A single speaker can be used as both a ring tone speaker that requires a speaker and a call tone speaker that does not need a large volume.

According to the third aspect of the present invention, the ringing tone limiting circuit is provided when the volume of the ringing tone indicated by the output signal of the ringing tone output circuit changes from a state below the reference volume to a state above the reference volume. Since the maximum volume is forcibly attenuated to the reference volume or less, even if a ringtone signal that suddenly exceeds the reference volume is output from the ringtone output circuit, the maximum volume is reduced from the volume limit circuit to the reference value. Since the sound is forcibly attenuated, the sound volume higher than the reference value is not output from the speaker.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a mobile phone device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an output stage circuit included in an audio processing unit of the mobile phone device shown in FIG.

FIG. 3 is a flowchart showing an operation of the audio limiting circuit of the output stage circuit shown in FIG. 2;

[Explanation of symbols]

 Reference Signs List 1 mobile phone device 40 CPU 42 ROM 44 RAM 46 communication unit 48 input unit 50 key buffer 52 display unit 53 audio processing unit 53A output stage circuit 530 call sound output circuit 531 ringtone output circuit 532 delay circuit 533 volume limit circuit 534 attenuation circuit 535 mixer and amplifier circuit 56 microphone 57 speaker 60 vibrator

Claims (3)

[Claims] When a call speaker and a ring tone speaker are shared by a single speaker, and the volume of the ring tone continuously exceeds the reference volume, an increase rate of the volume exceeding the reference volume. Mobile phone device, characterized in that: 2. A ring tone output circuit for outputting a ring tone signal, a ring tone volume limiting circuit for limiting the volume of a ring tone indicated by the output signal of the ring tone output circuit, and a voice signal of a call tone or a ring tone limiting circuit. A single speaker that emits a sound based on the output signal of the ring tone volume control circuit, wherein the ring tone volume limiting circuit continuously changes the reference tone volume by the ring tone volume indicated by the output signal of the ring tone output circuit. A mobile phone device for limiting the rate of increase of the volume exceeding the reference sound when the number exceeds the threshold. 3. The ring tone limiting circuit, when the volume of the ring tone indicated by the output signal of the ring tone output circuit changes from a state below the reference volume to a state above the reference volume, sets the maximum volume below the reference volume. The mobile phone device according to claim 2, wherein the mobile phone device is forcibly attenuated.