JP2861850B2 - VOX type mobile phone - Google Patents

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 such as a car telephone device, and more particularly to a VOX (Voice Operated Transmitt) for detecting a transmission voice and controlling ON / OFF of a transmitter.
er) A mobile phone device having a function.

[0002]

2. Description of the Related Art An example of this type of portable telephone device is shown in FIG. The transmitted voice is input to the microphone 1 and converted into a voice signal.
Further, the data is converted into audio data by the transmission audio signal processing unit 2 and transmitted as a radio signal from the transmission antenna 4 by the transmission unit 3. The radio signals received by the receiving antenna 5 and the receiving unit 6 are converted into audio data.
, And is output from the speaker 8 as a received voice. The control section 9 controls each section based on a key input section 10 provided in the telephone device.

The transmission audio signal processing section 2 has a VOX function, detects the level of an audio signal input to the microphone 1, and sets the audio signal level to a preset level value serving as a preset reference. In the following cases, the VOX is in the operation (ON) state, and the predetermined power supply system of the transmission audio signal processing unit 2 and the transmission unit 3 is turned off. When the audio signal level is equal to or higher than the set level value, the VOX is turned off,
Connect the power supply system. Therefore, when a sound of a predetermined level or higher is not input to the microphone 1, the VOX is turned on and the operation of the transmission system is stopped, so that the power consumption during that period is reduced, and the power consumption of the entire telephone device is reduced. It becomes possible to reduce.

[0004]

SUMMARY OF THE INVENTION Such a conventional VO
In the X-type portable telephone device, since a set level value serving as a reference for determining ON / OFF of the VOX is fixedly set, even if there is no transmitted voice, the noise of the external environment is large. In some cases, this noise may enter the microphone and raise the audio signal level. Therefore, when the level of this noise exceeds a predetermined level, the VOX is turned off, and power is supplied to the transmission system.
Therefore, there is a problem that the transmission system is driven even when there is no transmitted voice, the power consumption during this period is wasted, and the power consumption of the telephone device is increased.

To solve such a problem, it is conceivable to increase the reference level value of the VOX so that the VOX is not turned off even by noise. In some cases, the level value is not exceeded, so that the transmission voice cannot be transmitted, and normal communication may be hindered.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a VOX portable telephone device which prevents a waste of power consumption due to noise or the like and enables a normal call even when the transmitted voice is low. It is in.

[0007]

SUMMARY OF THE INVENTION The present invention has a VOX function of comparing the audio signal level of a transmission voice input to a microphone with a reference level and stopping a part of the transmission system based on the comparison result. In a VOX type mobile phone device,
Means for detecting an audio signal level of the received received voice;
A means for comparing the detected voice signal level with a reference voice level, and means for changing one of the voice signal level and the reference level of the transmission voice based on the comparison result.

Here, as means for changing the voice signal level of the transmitted voice, an attenuator is provided on the output side of the microphone, and the attenuator is attenuated based on a comparison result between the voice signal level of the received voice and the reference voice level. The amount is changed.

As means for changing the reference level, the VOX reference level is configured to be variable, and the reference level is changed based on a comparison result between the voice signal level of the received voice and the reference voice level.

In the present invention, when the voice signal level of the received voice is higher than the reference voice level, the attenuation of the attenuator is increased or the level value of the reference level is increased.

[0011]

When the level of the received voice received is high, the attenuation of the attenuator is increased so that the voice signal of the voice transmitted from the microphone is hardly larger than the reference level, and the VOX is turned on. And When the received voice is not received, the voice signal of the voice transmitted from the microphone is likely to be larger than the reference level by reducing the amount of attenuation, and the VOX is turned off. As a result, it is possible to reduce power consumption at the time of reception, and to realize a normal call with a small transmitted voice at the time of transmission.

Further, when the level of the received voice received is high, the reference level is raised, so that the voice signal of the voice transmitted from the microphone is hardly larger than the reference level, and the VOX is turned on. When the received voice is not received, the voice signal of the transmitted voice input from the microphone is likely to be larger than the reference level by lowering the reference level, and the VOX can be turned off.

[0013]

Next, an embodiment of 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 which the same components as those of the conventional configuration are denoted by the same reference numerals. That is, the transmitted voice is input to the microphone 1 and converted into a voice signal,
Further, the data is converted into audio data by the transmission audio signal processing unit, and transmitted as a wireless signal from the transmission antenna 4 by the transmission unit 3. The radio signal received by the receiving antenna 5 and the receiving unit 6 is converted into audio data, further converted into an audio signal by the received audio signal processing unit 7, and output from the speaker 8 as a received voice. The control section 9 controls each section based on a key input section 10 provided in the telephone device.

The microphone 1 to which a transmission voice is inputted.
Is connected to an attenuator 11, which can attenuate the audio signal output from the microphone 1 by a predetermined level. This attenuation level is varied based on a control signal output from the control unit 9, thereby adjusting the level of the audio signal output from the attenuator 11 to the transmission audio processing unit 2.

Although not described in detail, the transmission audio signal processing unit 2 has a VOX function, compares an input audio signal level with a reference level, and determines that the audio signal level is higher than the reference level. Is low, the VOX is turned on, and its power supply system is turned off. In this case, the power supply system of the transmission unit may be turned off.

FIG. 2 is a diagram showing a configuration of a portion related to the present invention in the control section 9. The control unit 9 is provided with a reception audio level detector 12 for detecting the level of the received audio signal input to the reception audio signal processing unit 7, and outputs the detected reception audio level value. Further, the control section 9 is provided with a level comparator 14 for comparing the detected received audio level with the reference audio level 13, and outputs a result of the comparison to the level controller 15. The level controller 15 outputs a control signal for controlling the amount of attenuation of the attenuator 11 based on the comparison result.

According to this configuration, when the telephone device is in the receiving state, that is, when the receiving unit 6 receives the radio signal of the receiving voice and the voice data is output to the receiving voice signal processing unit 7, In the control unit 9, the received voice level detected by the received voice level detector 12 is a relatively high level, so that in the comparison by the level comparator 14, the received voice level is higher than the reference voice level 13. Therefore, a control signal for increasing the amount of attenuation of the attenuator 11 is output from the level controller 15 to increase the amount of attenuation of the audio signal output from the microphone 1 and reduce the level of the audio signal.

For this reason, the level of the audio signal input to the transmission audio signal processing unit 2 is VOX set to VOX.
It becomes difficult to be higher than the reference level, and the VOX is turned on. Thereby, the transmission audio signal processing unit 2 and the transmission unit 3
Are turned off, thereby reducing power consumption. Therefore, in this state, even if noise from the external environment is input to the microphone 1, the level of the audio signal input to the transmission audio signal processing unit 2 is reduced due to the large amount of attenuation in the attenuator 11, and the VOX is turned on. Is held.

On the other hand, when the receiving section 6 does not receive the radio signal of the received voice, the received voice level detected by the received voice level detector 12 is extremely low.
In the level comparator 14, the received audio level is lower than the reference audio level 13. Therefore, a control signal for reducing the amount of attenuation of the attenuator 11 is output from the level controller 15, and the amount of attenuation of the audio signal output from the microphone 1 is reduced, and the level of the audio signal is increased.

For this reason, the level of the audio signal input to the transmission audio signal processing unit 2 is VOX set to VOX.
The voltage becomes lower than the reference level, and the VOX is turned off.
Therefore, power is supplied to the transmission audio signal processing unit 2 and the transmission unit 3, and transmission of transmission voice is possible. At this time, since the amount of attenuation of the attenuator 11 is small, even a small transmitted voice can be reliably transmitted.

Note that, even when the VOX is in the ON state in the above-described reception state, if a sound having a level higher than the reference sound level 13 is input to the microphone 1, an audio signal having a level higher than the VOX reference level in the VOX is input. Since the VOX is turned off when the call is made, the transmitted voice can be transmitted, and the voices transmitted by both parties simultaneously can be transmitted to the other party.

Here, the present invention may be configured to change the level value of the reference level for setting ON / OFF of the VOX. FIG. 3 is a block diagram of a main part showing one example, and the same parts as those in FIG. 2 are denoted by the same reference numerals.
In this embodiment, an attenuator is not connected to the microphone 1, but a VOX reference level setting unit 16 is provided in the transmission audio signal processing unit 2 in place of the attenuator.
Is configured to be variable by a control signal from the level controller 15. That is, when the received audio level is higher than the reference audio level 13, the level comparator 15 outputs a control signal for increasing the set level value of the VOX reference level setter 16 from the level controller 15. Conversely, when the received audio level is lower than the reference audio level, a control signal for lowering the set level value is output.

Therefore, in this configuration, when the received voice is received and the received voice level is high, the VOX reference level is increased by the control signal in the transmitted voice signal processing unit 2, so that the voice input from the microphone 1 is transmitted. It becomes difficult for the voice signal of the talk to become larger than the reference level, and VO
X is turned on. Further, when the received voice is not received, the VOX reference level is lowered by the control signal, so that the voice signal of the transmission input from the microphone tends to be higher than the reference level, and the VOX is turned off. As a result, similarly to the above-described embodiment, it is possible to reduce the power consumption at the time of reception, and at the same time, at the time of transmission, to transmit a small transmitted voice without fail, thereby realizing a normal call.

In the above-described embodiment, an example is shown in which the control section is provided with the reception sound level detector, the level comparator, and the level controller. You may make it provide in a processing part or an attenuator.

[0025]

As described above, according to the present invention, in a VOX type portable telephone device, a voice signal level of a received voice received is detected, compared with a reference voice level, and based on the result of the comparison. Since the amount of attenuation of the attenuator provided on the output side of the microphone is changed, when the level of the received voice received is high, the attenuation of the attenuator is increased to increase the amount of transmission from the microphone. Becomes difficult to exceed the reference level, and V
OX is turned on. When the received voice is not received, the voice signal of the voice transmitted from the microphone is likely to be larger than the reference level by reducing the amount of attenuation, and the VOX is turned off. As a result, it is possible to reduce power consumption at the time of reception, and to realize a normal call with a small transmitted voice at the time of transmission.

As means for changing the reference level, the reference level of the VOX is configured to be variable, and the reference level is changed based on the comparison result between the voice signal level of the received voice and the reference voice level. When the level of the received voice is high, the reference level is raised to make it difficult for the voice signal of the transmitted voice input from the microphone to become larger than the reference level, the VOX is turned on, and the received voice is received. If not, by lowering the reference level, the transmitted voice signal input from the microphone tends to be larger than the reference level, and the VOX can be turned off.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a telephone device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration related to the present invention among the configurations of the control unit.

FIG. 3 is a block diagram of a main part of another embodiment of the present invention.

FIG. 4 is a block diagram showing an overall configuration of a conventional telephone device.

[Explanation of symbols]

 Reference Signs List 1 microphone 2 transmission audio signal processing unit 3 transmission unit 6 reception unit 7 reception audio signal processing unit 8 speaker 9 control unit 10 key input unit 11 attenuator 12 reception audio level detector 13 reference audio level 14 level comparator 15 level controller 16 VOX reference level setting device

Claims (2)

(57) [Claims] An audio signal level of a transmission voice input to a microphone is compared with a reference level, and based on a result of the comparison, a VOX mobile phone device having a VOX function of stopping a part of a transmission system is provided. means for comparing a detection means for detecting a voice signal level of the reception voice, a <br/> audio signal level of the detected the received voice with reference voice levels, pre
Attenuating means for attenuating the voice signal level of the transmitted voice;
The voice signal level of the received voice is lower than the reference voice level.
Is larger, the amount of attenuation of the attenuation means is increased.
While reducing the voice signal level of the transmission voice,
The voice signal level of the received voice is higher than the reference voice level.
If smaller, the amount of attenuation of the attenuation means is reduced and
Equipped with control means for increasing the voice signal level of the transmission voice
VOX system mobile phone device, characterized in that that. 2. A voice signal of a transmission voice input to a microphone.
Compare the level with the reference level, and based on the comparison result
VOX with VOX function to stop part of transmission system
Signal of the received voice received by the mobile phone
Detecting means for detecting a level,
Means for comparing the audio signal level with a reference audio level;
The voice signal level of the received voice is higher than the reference voice level.
Is larger, the level value of the reference level is increased.
On the other hand, the audio signal level of the received voice is
If the value is smaller than the level, the level value of the reference level
VOX characterized by comprising control means for reducing
Method mobile phone device.