JPH08251257A - Portable telephone set - Google Patents

Abstract

PURPOSE: To provide a portable telephone set capable of amplifying incoming call reporting sound appropriately corresponding to.311 environmental sound level. CONSTITUTION: A microphone 4 converts environmental sound into electric signals and a level measurement part 3 converts the level of the electric signals into a digital value and sends it to a control part 2. When incoming call signals are received from a radio part 1, the control part 2 continuously sets the singing frequency and reporting sound volume of the incoming call reporting sound corresponding to the size of the digital value. An incoming call reporting signal setting part 6 generates singing frequency control signals and reporting sound volume control signals respectively corresponding to the singing frequency and the reporting sound volume. A reporting sound generation part 7 generates the incoming call reporting sound signals of a frequency corresponding to the singing frequency control signals and a sound volume adjustment part 8 is controlled by the reporting sound volume control signals and adjusts the level of the incoming call reporting sound signals. A speaker 9 amplifies the level- adjusted incoming call reporting sound signals.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a car telephone system, etc.
The present invention relates to a mobile phone for a mobile communication system, and particularly to a mobile phone that changes an incoming call notification sound according to the loudness of an environmental sound.

[0002]

2. Description of the Related Art A conventional mobile phone of this type, when receiving an incoming signal from a radio base station of a mobile communication system, expands an incoming call notification sound by a speaker. Here, the mobile phone is
It is inevitably used not only in quiet places but also in places with high environmental noise (noise). It is desirable to set the volume of the above-mentioned incoming call notification sound in harmony with the environment, that is, it is small in a quiet place so as not to disturb other people, and in a place where the environmental sound is loud, the mobile phone operator is notified of the incoming call sound. It is good to set it large enough to hear the sound clearly. Japanese Patent Laid-Open No. 4-56536 discloses some telephones or mobile radios that can automatically set the volume of the incoming call notification sound in proportion to the ambient sound level.
JP-A-4-302204 and JP-A-4-271
619). The mobile wireless device disclosed in Japanese Unexamined Patent Publication No. 4-271619 analyzes the frequency of the environmental sound to facilitate the discrimination between the incoming call notification sound and the environmental sound, and determines the frequency of the incoming call notification sound as the environmental sound with the least energy. Set to frequency.

[0003]

In the above-mentioned conventional portable telephone, since the volume of the incoming call notification sound is made substantially proportional to the level of the environmental sound, the volume of the incoming call notification sound has an upper limit due to the limitation of power consumption and the like. In this case, in the case of a large environmental sound level, the level of the incoming call notification sound cannot be increased in proportion to this environmental sound level, and there is a drawback that the incoming call notification is easily missed.

Further, the mobile radio device disclosed in Japanese Patent Laid-Open No. 4-271619 requires not only an expensive circuit such as a filter for analyzing the frequency of the environmental sound, but also the frequency setting method of the incoming call notification sound is complicated. There was a drawback.

Therefore, an object of the present invention is to provide a portable telephone which can be sufficiently applied to a large environmental sound level and has a simple structure and which can amplify an incoming call notification sound corresponding to the environmental sound level. .

[0006]

The mobile phone of the present invention comprises:
A microphone for converting environmental sound into an electric signal, a level measuring unit for converting the level of the electric signal into a digital value, a ringing frequency of an incoming call notification sound when receiving a decoded incoming signal and the digital value within a predetermined range. And a notification volume are set continuously according to the magnitude of the digital value, and a ringing frequency control signal and a notification volume control signal respectively corresponding to the ringing frequency and the notification volume from the control section. An incoming call alert signal setting unit that generates an incoming call alert sound signal having a frequency corresponding to the ringing frequency control signal, and an incoming call alert signal that is controlled by the alert volume control signal. A volume control section for adjusting the level of the notification sound signal, and a speaker for generating the incoming call notification sound from the incoming notification sound signal level-adjusted by the volume control section. Provided.

In one of the mobile phones, the control unit is
It is possible to adopt a configuration in which the set values of the ringing frequency and the notification sound volume are increased as the digital value is increased.

[0008]

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

FIG. 1 is a block diagram of an embodiment of the present invention.

In this mobile phone, the radio unit 1 receives an incoming signal from a radio base station of a mobile communication system. The wireless unit 1 demodulates and decodes this incoming signal and supplies it to the control unit 2. On the other hand, the microphone 4 converts environmental sound (noise) around the mobile phone into an electric signal and sends the electric signal to the level measuring unit 3. The level measuring unit 3 A / D-converts this electric signal, and sends to the control unit 2 a digital value corresponding to the magnitude of the electric signal, that is, the level of the environmental sound.

Upon receiving the decoded incoming signal and the digital value, the control unit 2 continuously sets the ringing frequency of the incoming call alert sound and the alert volume according to the magnitude (level) of the digital value. . If the digital value is out of the predetermined range, the control unit 2 keeps the sound frequency and the notification sound volume at the limit values. The ringing frequency and the notification volume set by the control unit 2 are supplied to the incoming call notification signal setting unit 6. The incoming call notification signal setting unit 6 generates a ringing frequency control signal and a notification volume control signal respectively corresponding to the ringing frequency and the notification volume.

The notification sound generating section 7 generates an incoming notification sound signal of a frequency corresponding to the ringing frequency control signal in response to the ringing frequency control signal, and sends the incoming notification sound signal to the volume adjusting section 8. The volume control unit is controlled by the notification volume control signal to adjust the level of the incoming call notification sound signal. The incoming call notification sound signal whose level is adjusted by the volume adjusting unit 8 is amplified by the speaker 9 and becomes the incoming call notification sound to the operator of this mobile phone.

When the operator recognizes the incoming call notification sound, the control section 2 performs an incoming call answering operation. By this operation, the control unit 2 generates an incoming call response signal, and the incoming call response signal is transmitted to the wireless base station via the wireless unit 1. As a result,
This mobile phone can be put into a call state, after which the operator uses the handset 5 to make a call with the radio base station or another phone.

FIG. 2 is a diagram showing the relationship between the ringing frequency and the level of the incoming call notification sound with respect to the environmental sound level in this embodiment.

The operation of the control unit 2 of this embodiment will be described in more detail with reference to FIGS. 1 and 2. When the surroundings of this mobile phone are quiet and the environmental sound level (digital value) N input to the control unit 2 is the lower limit value Nth1 or less, the sounding frequency F and the notification sound level (report sound volume) V are set to the lowest frequency, Eg 800 Hz and the lowest level V
Set to th1. On the other hand, when the surroundings of the mobile phone are noisy and the environmental sound level N is equal to or higher than the upper limit Nth2, the ringing frequency F and the notification sound level V are set to the highest frequency, for example, 2.5 kHz and the maximum level Vth2.
When the environmental sound level N is the above intermediate level, the sounding frequency F
And the notification sound level V is set to an intermediate level.

Here, if the sounding frequency F is low, even if the notification sound level V is the same, a person feels the incoming notification sound from the speaker 9 as a small sound, and conversely, if the sounding frequency F is high, the person hears from the speaker 9. The incoming call alert sound tends to be loud.
Therefore, if the sound frequency F is increased as the environmental sound level N increases, it is not necessary to increase the alarm sound level V in proportion to the environmental sound level N. Therefore, it is possible to widen the dynamic range in which a person can distinguish the incoming call notification sound, and even when the volume of the incoming call notification sound V has an upper limit due to the limitation of power consumption and the like, when the environmental sound level N is larger than the conventional example. Also, the incoming call notification sound can be identified.

Further, this embodiment does not require an expensive circuit such as a filter for analyzing the frequency of the environmental sound, and the ringing frequency F of the incoming call notification sound is simply increased as the environmental sound level N increases. The method of setting the ringing frequency is also simple.

Further, the present embodiment is characterized in that the sounding frequency F suddenly jumps to another frequency in accordance with the minimum energy frequency of the environmental sound, so that the operator is less confused or troublesome.

[0019]

As described above, according to the present invention, the ringing frequency of the incoming call alert sound and the alert volume are set continuously according to the loudness of the environmental sound, and the voice is amplified. Even when the volume of the incoming call notification sound V has an upper limit, and even when the environmental sound level N is higher than the conventional example, there is an effect that the incoming call notification sound can be easily identified.

Further, according to the present invention, an expensive circuit such as a filter is not required for analyzing the frequency of the environmental sound, and the ringing frequency of the incoming call notification sound is simply increased as the environmental sound level increases. There is an effect that the frequency setting is easy.

Further, the present invention has an effect that the operator is less confused or annoyed by the sounding frequency suddenly jumping to another frequency according to the minimum energy frequency of the environmental sound.

[Brief description of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a ringing frequency and an incoming call notification sound level with respect to an environmental sound level in the present embodiment.

[Explanation of symbols]

 1 Wireless unit 2 Control unit 3 Level measuring unit 4 Microphone 5 Handset 6 Incoming call notification signal setting unit 7 Notification sound generating unit 8 Volume control unit 9 Speaker

Claims (2)

[Claims] 1. A microphone for converting an environmental sound into an electric signal, a level measuring unit for converting a level of the electric signal into a digital value, a decoded incoming signal and an incoming call notification when receiving the digital value within a predetermined range. A control unit that continuously sets the sound frequency of the sound and the notification volume according to the magnitude of the digital value, and the sound frequency control signals from the control unit that correspond to the sound frequency and the notification volume, respectively. And an incoming call alert signal setting unit that generates an alerting sound volume control signal, an alerting sound generating unit that responds to the ringing frequency control signal and generates an incoming alerting sound signal of a frequency corresponding to this signal, and the alerting sound volume control signal A volume control unit that controls the level of the incoming call notification sound signal is controlled, and the incoming call notification sound is generated from the incoming call notification sound signal whose level is adjusted by the volume control unit. A mobile phone comprising a speaker. 2. The mobile phone according to claim 1, wherein the control unit increases the set values of the ringing frequency and the notification volume as the digital value increases.