JP3034550U - Telephone - Google Patents

Abstract

(57) [Abstract] [Problem] Conventionally, it is difficult to make a call with a small voice in a noisy environment. SOLUTION: The transmission volume of the transmission is increased as compared with that in the normal call mode and the ambient noise is reduced, and at the same time, the reception volume of the reception is increased as compared with that in the normal communication mode.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a technology for making a call without disturbing other people, and relates to a volume control technology for a telephone for making a whisper-quiet voice call, and is particularly suitable for a mobile phone and a PHS mobile terminal. Volume adjustment technology.

[0002]

[Prior art]

 When a call is made in a loud voice to a person around the cell phone, when the cell phone is set to a certain operation mode by automatic detection of the ambient noise level or manual operation of the call mode switch button, etc. The volume rises and at the same time the noise canceller operates and you can talk in a small voice.

In addition, the mobile phone has a common external interface using a standard connector such as a 16-pin terminal, and can connect an external terminal device. Therefore, a facsimile or a personal computer can be connected to this external interface for use, or a hands-free device can be connected to make a voice call using a mobile phone.

[0004]

[Problems to be solved by the device]

 As a situation where the function described in the first of the conventional techniques is used, there is a place where there is a lot of ambient noise, such as when getting on a train, but making a call with a loud voice disturbs the people around. In such a case, it is generally difficult to hear the voice received from the other party in a noisy environment, which causes an illusion that the other party cannot hear his / her own voice. In such a situation, trying to make a call in a small voice makes me uneasy, and in reality, making a call in a small voice becomes very difficult.

The second situation, in which the external terminal device is connected and used, is the first situation due to automatic detection of ambient noise and erroneous operation of the call mode switching button, even though no call is made using the mobile phone. The telephone having the function described in the second has a disadvantage that the operation mode is switched.

An object of the present invention is to solve the problems of the prior art and to improve a telephone that facilitates making a voice call in a noisy environment.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems of the prior art, the telephone of the present invention comprises a transmission volume adjusting section for adjusting the volume input to a microphone, a noise canceller function section for reducing ambient noise input from the microphone, and a speaker. The listening volume adjusting section for adjusting the volume output from the telephone, the call mode switching operation means, and the transmission volume adjusting section and reception when the switching operation means is operated during a call in the normal call mode. A control unit for increasing the volume adjustment level of the volume adjustment unit and switching the operation state to a specific call mode for operating the noise canceller function unit is provided.

In addition, the telephone of the present invention outputs from a speaker, a transmission volume adjusting unit that adjusts the volume input to the microphone, a noise canceller function unit that reduces ambient noise input from the microphone, and a speaker. A listening volume adjusting section for adjusting the volume, a storage means for storing the set value of each volume adjusting level of the transmitting volume adjusting section and the receiving volume adjusting section, a call mode switching operation means, and a normal operating state. When the switching operation means is operated during a call in the call mode, the volume adjustment levels of the transmission volume adjustment section and the reception volume adjustment section are both increased by a predetermined level from the set value of the storage means, and the noise canceller function is also provided. When the switching operation means is operated during a call in the specific call mode, the operation state is switched to a specific call mode for operating the unit. And a control unit that returns the operation state to the normal call mode, returns both the volume adjustment levels of the transmission volume adjustment unit and the reception volume adjustment unit to the set values of the storage unit, and stops the operation of the noise canceller function unit. It was equipped with.

Further, the telephone of the present invention outputs from a speaker, a transmission volume adjusting unit that adjusts the volume input to the microphone, a noise canceller function unit that reduces ambient noise input from the microphone, and a speaker. A reception volume adjusting section for adjusting the volume, a call mode switching operation means, and a transmission volume adjusting section and a reception volume adjustment when the switching operation means is operated during a call in a normal call mode. Control unit that increases the volume control level of both units and operates the noise canceller function unit to switch the operating state to a specific call mode, and a common interface that connects an external terminal device such as a hands-free device or a fax machine device. A detecting unit that detects that an external terminal device is connected to the interface; When the external terminal device is detected to be connected to the interface, an audio line switching means for connecting and switching the audio signal line communicating with the telephone line from the microphone and the speaker to the interface is provided, and the control unit is normally The operation of the switching operation means is invalidated in the call mode and the state in which the detection unit detects that the external terminal device is connected to the interface.

[0010]

[Embodiment of the invention]

 FIG. 1 is a block diagram of a mobile phone showing an embodiment of the present invention. A speaker SP, a microphone MC, a control unit 1, a reception volume adjusting function unit 2, a transmission volume adjusting function unit 3, a noise canceller function unit 4, and a man-machine. It is composed of an interface 5 and an operation unit 6. TX is a transmission (transmission) unit, and RX is a reception (reception) unit. The line indicated by c indicates the control signal line of the control unit 1. The line indicated by d indicates an audio signal line. In the present embodiment, each unit from the control unit 1 to the noise canceller function unit 4 and the like is integrated into a DSP (digital signal processor).

A voice signal from the reception (reception) unit RX is amplified by the reception volume adjusting function unit 2 and output as a voice from the speaker SP. The voice signal input from the microphone MC is amplified by the transmission volume adjusting function unit 3, passes through the noise canceller function unit 4, and is transmitted to the transmission (transmission) unit TX. In the normal call mode, the control unit 1 turns off the operation of the noise canceller function unit 4.

When a specific button (call mode switching button) (not shown) of the operation unit 6 is pressed, the control unit 1 detects it by the detection unit a through the man-machine interface 5, and switches to the specific call mode. The set values of the volume adjustment levels of the reception volume adjusting function unit 2 and the transmission volume adjusting function unit 3 in the normal call mode are set and stored in the rewritable memory b 1 of the control unit 1.

In the specific call mode, the control unit 1 determines the volume adjustment level (eg, amplification factor) of the transmission volume adjusting function unit 3 from the above-mentioned set value in the memory b more than before switching (in the normal call mode). The level is increased (microphone sensitivity is increased), the noise canceller function unit 4 is operated, and the volume adjustment level (eg, amplification factor) of the reception volume adjustment function unit 2 is similarly stored in the memory b before switching (in normal call mode). Control is performed to increase a predetermined level from the above set value. 3 is a graph in which the horizontal axis represents time (t) and the vertical axis represents volume (Vol). (A) shows an output example of the transmission volume adjusting function unit 3 in the normal call mode, (b) Shows an output example of the transmission volume adjusting function section 3 in a state where the microphone sensitivity is increased, and (c) shows an output example in which the noise of the output example of (b) is reduced by the noise canceller function section 4. As shown in (b), when the microphone sensitivity is increased, ambient noise is more likely to be picked up, and an unpleasant sound is heard by the other party. Therefore, in the specific call mode, as shown in (C), the microphone sensitivity of the transmission volume adjusting function unit 2 is increased and the noise canceller function unit 4 is operated to reduce ambient noise.

As can be seen from the above, the increase in the transmission volume is set so that it can be sufficiently heard by the receiver of the other party even when the call is made with whispering voice. Increasing the transmission volume also makes it easier to pick up ambient noise, which may cause an uncomfortable sound to the other party. Therefore, the transmission volume is increased and at the same time the noise canceller function unit 4 is activated to reduce ambient noise. To reduce. In addition, if the place where you are talking is a place with a lot of noise around you, it may be anxious if you try to make a quiet call when the other party's voice is hard to hear. Increase the listening volume.

When the user does not need to talk in a low voice, the user presses the call mode switching button on the operation unit 6 again. When the control unit 1 detects the operation of the call mode switching button by the detection unit a, the control unit 1 switches the operation state from the specific call mode to the normal call mode to change the volume adjustment levels of the reception volume adjusting function unit 2 and the transmission volume adjusting function unit 3. The setting is returned to the volume adjustment level in the normal call mode stored in the memory b, the operation of the noise canceller function unit 4 is stopped, and the power consumption is reduced as described above to allow normal communication.

FIG. 2 is a block diagram of a mobile phone showing a second embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals. This embodiment shows an example of a mobile phone having a common external interface 7 having a standard connector such as a 16-pin terminal. An external terminal device such as a facsimile machine or a hands-free device is connected to the external interface 7, and the external terminal device is connected to a wireless telephone line through a reception (reception) unit RX and a transmission (transmission) unit TX. When an external terminal device is connected to the external interface 7, a signal line is provided so that the connection can be detected by the detection unit a. When the detection unit a detects the connection of the external terminal device in the normal call mode, the control unit 1 switches the changeover switches 8-1 and 8-2 of the voice signal line d to the external interface 7 side to adjust the reception volume. The part 2, the speaker SP, the noise canceller function part 4, the transmission volume adjusting function part 3 and the microphone MC are separated from the audio signal line d. Further, in this state, even if the detection unit a detects that the call mode switching button (not shown) of the operation unit 6 is pressed due to an erroneous operation, the control unit 1 ignores the detection result and remains in the normal call mode and remains in the specific call mode. Since the mode is not switched to the mode and the operation of the noise canceller function unit 4 remains OFF, it is possible to avoid a situation in which power consumption increases without noticing.

[0017]

[Effect of the invention]

 INDUSTRIAL APPLICABILITY According to the present invention, a call can be comfortably made with a small voice in a noisy condition in a noise.

Further, according to the present invention, it is possible to prevent an operation mode change due to an erroneous operation or the like by connecting an external terminal device to a telephone which can comfortably make a call with a small voice in a noisy state under noisy conditions.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a mobile phone showing a second embodiment of the present invention.

FIG. 3 is a graph for explaining an embodiment of the present invention, in which (a) to (c) are graphs in which the horizontal axis represents time (t) and the vertical axis represents volume (Vol); ) Indicates an output example of the transmission volume adjusting function unit 3 in the normal call mode,
(B) shows an output example of the transmission volume adjusting function unit 3 in a state where the microphone sensitivity is increased, and (c) is a graph showing an output example in which noise of the output example of (b) is reduced by the noise canceller function unit 4. .

[Explanation of symbols]

 SP: Speaker MC: Microphone 1: Control part 2: Received sound volume adjustment function part 3: Transmission sound volume adjustment function part 4: Noise canceller function part 5: Man-machine interface 6: Operation part 7: External interface 8-1, 8-2 : Changeover switch a: Detection part b: Memory c: Control signal line d: Audio signal line

Claims (3)

[Utility model registration claims] 1. A transmission volume adjusting section for adjusting a volume input to a microphone, a noise canceller function section for reducing ambient noise input from the microphone, and a reception volume adjusting section for adjusting a volume output from a speaker. And a call mode switching operation means, and when the switching operation means is operated during a call in a normal call mode, the volume adjustment levels of the transmission volume adjusting section and the reception volume adjusting section are both increased. A telephone including: a control unit that switches an operation state to a specific call mode for operating the noise canceller function unit. 2. A transmission volume adjusting section for adjusting volume input to a microphone, a noise canceller function section for reducing ambient noise input from the microphone, and a reception volume adjustment for adjusting volume output from a speaker. Section, storage means for storing the set value of each volume adjustment level of the transmission volume adjusting section and the reception volume adjusting section, call mode switching operation means, and the switching during a call in the normal call mode. When the operation means is operated, the volume adjustment levels of the transmission volume adjustment section and the reception volume adjustment section are both increased by a predetermined level from the set value of the storage section and the noise canceller function section is operated in a specific call mode. And when the switching operation means is operated during a call in the specific call mode, the operating state is changed to the normal call mode. And a control unit for returning the volume adjustment levels of the transmission volume adjusting unit and the reception volume adjusting unit to the set values of the storage unit and stopping the operation of the noise canceller function unit. Telephone. 3. A transmission volume adjusting section for adjusting volume input to a microphone, a noise canceller function section for reducing ambient noise input from the microphone, and a reception volume adjusting section for adjusting volume output from a speaker. And a call mode switching operation means, and when the switching operation means is operated during a call in a normal call mode, the volume adjustment levels of the transmission volume adjusting section and the reception volume adjusting section are both increased. A control unit for switching the operating state to a specific call mode for operating the noise canceller function unit, and a common interface for connecting an external terminal device such as a hands-free device or a facsimile device,
A detection unit that detects that an external terminal device is connected to the interface, and, when the detection unit detects that the external terminal device is connected to the interface, an audio signal line that communicates with a telephone line from the microphone and the speaker. Audio signal line switching means for switching connection to the interface is provided, and the control unit is in a normal call mode, and the detection unit detects that the external terminal device is connected to the interface. A telephone characterized in that the operation of the switching operation means is invalidated.