JP2002033791A - Mobile telephone set and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exactly operate a VOX function even while a portable telephone set is in any usage state. SOLUTION: A storage part 13 stores plural thresholds corresponding to respective handset using state, hands-free using state and earphone using state with values for optimizing the VOX function. Corresponding to the detected result of a usage state detecting part 6, a control part 12 detects which one of handset using state, hands-free using state and earphone using state a portable telephone set 1 is, reads a relevant threshold out of the storage part 13, corresponding to the detected result and outputs that read threshold to a VOX control part 10. Even while the portable telephone set 1 is in any usage state, the VOC function can be exactly operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stopping the supply of power to a part of a transmission system or reducing the supplied power based on a comparison result of comparing a physical quantity relating to a transmission voice with a threshold value. And a program executed by the mobile phone.

[0002]

2. Description of the Related Art Conventionally, mobile telephones such as mobile telephones and vehicle-mounted telephones have been widely used.
By the way, this type of mobile telephone is called VOX (Voice Operated).
Transmitter) is a common configuration. The VOX function is to compare, for example, the power of the transmitted voice input by the microphone with a threshold (voice power threshold). If the power of the transmitted voice is less than the threshold, it is determined that the voice is a silent section. The power supply to some circuits of the system is stopped or the supplied power is reduced to reduce the power consumption of the mobile phone in a silent period.

However, the conventional mobile telephone has the following problem because the threshold value for determining the presence or absence of sound is constant regardless of the usage state of the mobile telephone. That is, the use state of the mobile telephone includes a handset use state in which both the hands-free microphone and the earphone microphone are not connected, a hands-free use state in which the hands-free microphone is connected, and a state in which the earphone microphone is connected. , There is an earphone use state used, and the characteristics of the transmission voice input by each microphone are different from each other in each use state.

[0004] Therefore, if the threshold value is constant as described above, for example, even if the VOX function works properly in the handset use state, the VOX function may not work properly in the hands-free use state. There is a problem that the sound quality is deteriorated due to this.

In this case, the silent section is determined by comparing the power per unit time of the transmitted voice with a threshold (voice power difference threshold) in addition to the above-described method of comparing the power of the transmitted voice with a threshold. There is a method of comparing the power of a specific band of the transmitted voice with a threshold (band power threshold) and a method of comparing the frequency component (for example, reflection coefficient) of the transmitted voice with a threshold (frequency component threshold). In any of these methods, since the respective thresholds are constant irrespective of the usage state of the mobile telephone, the same problems as those described above occur in the same manner as in the above case. .

The present invention has been made in view of the above circumstances, and has as its object to enable the VOX function to work properly in any of a plurality of use states. Accordingly, it is an object of the present invention to provide a mobile telephone and a program capable of preventing sound quality from being deteriorated.

[0007]

According to the mobile telephone of the present invention, the storage means stores a plurality of thresholds corresponding to a plurality of use states of the mobile telephone, and the use state detection means comprises:
It detects which of the plurality of use states the mobile phone has transitioned to. Then, the control means selects a threshold value corresponding to the detection result of the use state detection means from the plurality of threshold values stored in the storage means, operates the VOX control means based on the selected threshold value, and executes the VOX control. The means compares the physical quantity related to the transmitted voice with a threshold value, and stops supplying power to a part of the transmitting system or reduces the supplied power based on the comparison result.

That is, according to this, the use state of the mobile telephone is detected, a threshold value corresponding to the use state of the mobile telephone is selected from a plurality of threshold values, and the physical quantity relating to the transmitted voice is determined by the selected threshold value. And the power supply to a part of the transmission system is stopped or the supplied power is reduced based on the comparison result, so that a plurality of threshold values suitable for a plurality of use states are provided. Is set so that the mobile phone can be in the VO
The X function can be made to work properly, thereby preventing the sound quality from being degraded.

According to the second aspect of the present invention, a plurality of use states include a handset use state in which a voice input by a handset microphone is processed as a transmission voice, and a voice input by a hands-free microphone is processed as a transmission voice. It is configured to be able to transit to any one of a hands-free use state and an earphone use state in which the voice input by the earphone microphone is processed as a transmission voice.

[0010] That is, according to this configuration, the mobile telephone can be transited to any one of the handset use state, the hands-free use state, and the earphone use state. In any of the free use state and the earphone use state, the VOX function can be properly operated.

According to the third aspect of the present invention, the use state detecting means automatically detects the connection state of the hands-free microphone and the earphone microphone, so that the handset use state, the hands-free use state, and the earphone use state are used. Which of the use states has been transited is detected.

That is, according to this, by automatically detecting the connection state of the hands-free microphone and the earphone microphone, the state transits to any of the handset use state, the hands-free use state and the earphone use state. Since it is configured to detect whether the handset is in use, by not connecting both the hands-free microphone and the earphone microphone, the VOX function optimal for the handset use state can be automatically operated properly in the handset use state. In addition, by connecting a hands-free microphone, the VOX that is optimal for the hands-free use state is automatically set in the hands-free use state.
The function can be operated accurately, and further, by connecting the earphone microphone, the VOX function optimal for the earphone use state can be automatically operated properly in the earphone use state.

According to the fourth aspect of the present invention, the use state detecting means detects the state in which the hands-free microphone is connected and the handset is mounted on the cradle or the state equivalent thereto, so that the hands-free state is detected. Detects transition to the use state.

That is, according to this, it is determined that the hands-free microphone has been connected and the handset has been mounted on the cradle or a state equivalent thereto has been detected, thereby transiting to the hands-free use state. Because it is configured to detect, by connecting a hands-free microphone and attaching the handset to the cradle or making it equivalent to it, in the hands-free use state, it is automatically optimized for the hands-free use state. The VOX function can work properly.

According to the mobile telephone of the present invention, when the use state detecting means detects that the mobile phone has transitioned to one use state, the control means sets at least one threshold having one unit. Select and select at least one
Operating the VOX control means based on one of the thresholds, and when the use state detecting means detects that the state of use has transitioned to another use state different from the one use state, at least different from the one unit. Another threshold having one other unit is selected, and the VOX control means is operated based on the selected at least one other threshold.

That is, according to this, if the state has transitioned to one use state, the VOX function is operated based on at least one one threshold having one unit, while the one use state is mutually different. If a transition is made to another different use state, the VOX function is configured to operate based on at least one other threshold having another unit different from one unit. , By selecting optimal thresholds with different units
The OX function can work properly.

According to the sixth aspect of the present invention, when the use state detecting means detects that the mobile phone has transitioned to the handset use state or the earphone use state, the control means sets the threshold value relating to the power of the transmission voice and A threshold value relating to the frequency component of the transmitted voice is selected, and the VOX control means is operated based on the selected threshold value relating to the power of the transmitted voice and the threshold value relating to the frequency component of the transmitted voice, and transits to the hands-free use state. When the use state detecting means detects that the power of the transmitted voice is selected,
Based on the threshold value related to the power of the selected transmission voice, V
The OX control means is operated.

That is, according to this, if the state transitions to the handset use state or the earphone use state,
The VOX function is activated based on the threshold value related to the power of the transmitted voice and the threshold value related to the frequency component of the transmitted voice. Since the VOX function is configured to operate, in general, in the state of using the handset or the state of using the earphone, it is hardly affected by the ambient sound.
In the hands-free use state, in consideration of the susceptibility to ambient sound, in the handset use state or the earphone use state, in addition to comparing the power of the transmitted voice with the threshold value, the frequency component of the transmitted voice is By comparing the VOX function with the threshold value, the VOX function can be appropriately operated accordingly.

According to the mobile telephone of the present invention, the storage means stores a plurality of different thresholds having the same unit in the same use state.

That is, according to this configuration, since a plurality of different thresholds having the same unit are stored in the same use state, a plurality of different thresholds having the same unit in the same use state are stored. By setting a value at which the VOX function works easily, it is possible to make the VOX function work easily. Conversely, by setting a value at which the VOX function is difficult to work, the VOX function can be set. V can be made difficult to work
The extent to which the OX function works can be made variable.

According to the mobile telephone of the present invention, the storage means stores a plurality of band conditions corresponding to the plurality of use states, and the control means determines that the state has transitioned to one use state. When the detecting means detects, one band condition having one predetermined frequency band is selected, the VOX control means is operated based on the selected one band condition, and another use condition different from the one use condition is used. When the use state detecting means detects that the state has transitioned to another state, another band condition having another predetermined frequency band different from the one predetermined frequency band is selected, and based on the selected other band condition. To operate the VOX control means.

That is, according to this, if the state has transited to one use state, the VOX function is operated based on one band condition having one predetermined frequency band. If a transition to another different use state is made, the VOX function is operated based on another band condition having another predetermined frequency band different from the one predetermined frequency band. Depending on,
By selecting the optimal band conditions having different frequency bands, the VOX function can be operated properly.

According to the ninth aspect of the present invention, when the use state detecting means detects a transition to the handset use state or the earphone use state, one band condition having one predetermined frequency band is selected. Then, the VOX control means is operated based on the selected one band condition, and when the use state detection means detects a transition to the hands-free use state, another one different from the one predetermined frequency band is used. Another band condition having a predetermined frequency band is selected, and VO based on the selected other band condition is selected.
X control means is operated.

That is, according to this, if the state transitions to the handset use state or the earphone use state,
Based on one band condition having one predetermined frequency band, V
Activate the OX function and, on the other hand, if the state transitions to the hands-free use state, VOX is performed based on another band condition having another predetermined frequency band different from the one predetermined frequency band.
In general, in the hands-free use state, it is often used in a car, and in consideration of the low frequency band of the ambient sound during driving, it is considered that, for example, By setting a frequency band other than the low frequency band from the predetermined frequency band as another predetermined frequency band, the VOX function can be appropriately operated accordingly.

According to the mobile telephone of the present invention, the control means selects a threshold value corresponding to a predetermined operation of the operation means from a plurality of threshold values stored in the storage means, and based on the selected threshold value. To operate the VOX control means.

That is, according to this, a threshold value corresponding to a predetermined operation by the operation means is selected from a plurality of threshold values, a physical quantity related to the transmitted voice is compared with the selected threshold value, and based on the comparison result, The power supply to a part of the transmission system is stopped or the supplied power is reduced, so that a predetermined operation is performed by the operation means so that the mobile telephone can be in any use state. The VOX function can be operated accurately by manual operation.

According to the program described in claim 11, when the program is installed on the mobile telephone and executed, the first step is to determine which of the plurality of usage states the mobile telephone has transitioned to. And the second
In the procedure, a threshold corresponding to the detection result in the first procedure is selected from a plurality of thresholds stored in the storage means, and in the third procedure, the physical quantity related to the transmitted voice is compared with the threshold. V that stops supplying power to a part of the transmission system or reduces the supplied power based on the comparison result
The OX control means is operated based on the threshold value selected in the second procedure. That is, according to this embodiment, the same operation and effect as those described in claim 1 can be obtained, and by setting values suitable for a plurality of use states as the plurality of thresholds, the mobile telephone In any of the use states, the VOX function can be properly operated, thereby preventing the sound quality from being degraded.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is applied to a mobile phone will be described below with reference to FIGS. FIG. 1 is a functional block diagram showing a configuration of a transmission system in a mobile phone.
The mobile phone 1 can process voice input by the handset microphone 2 as transmission voice, and connect the hands-free microphone 3 to a main body (not shown) so that the hands-free microphone 3 can input the voice. Can be processed as transmitted voice, and furthermore, by connecting the earphone microphone 4 to the main body, the voice input by the earphone microphone 4 can be processed as transmitted voice. I have.

The switching section 5 detects the connection state between the hands-free microphone 3 and the earphone microphone 4 and outputs the detection result to the use state detection section 6 (use state detection means in the present invention). The transmission voice path is switched according to the detection result.

That is, if neither the hands-free microphone 3 nor the earphone microphone 4 is connected, the switching unit 5 outputs the transmission voice so that the voice input by the handset microphone 2 is output to the analog amplifier 7 as the transmission voice. And if the hands-free microphone 3 is connected and the handset is attached to a cradle (not shown) or in a state equivalent thereto, the voice input by the hands-free microphone 3 is used as the transmission voice. Analog amplifier 7
The route of the transmitted voice is switched so that the voice is output to the analog amplifier 7, and if the earphone microphone 4 is connected, the voice input by the earphone microphone 4 is output to the analog amplifier 7 as the transmitted voice. Switch.

The analog amplifier 7 amplifies the input transmission voice when any one of the handset microphone 2, the hands-free microphone 3, and the earphone microphone 4 inputs the transmission voice through the switching unit 5, and amplifies the transmission voice. Is output to the filter 8, and when the transmission voice is input from the analog amplifier 7, the filter 8 removes unnecessary frequency components from the input transmission voice and outputs the transmission voice to the A / D converter 9.

When the transmitted voice is input from the filter 8, the A / D converter 9 converts the input transmitted voice from an analog signal to a digital signal, and converts the transmitted voice into a VOX signal.
(Voice Operated Transmitter) Control section 10 (VOX control means in the present invention) and outputs to voice encoding section 11.

When the detection result is input from the switching unit 5, the use state detection unit 6 detects the use state of the mobile phone 1 in accordance with the input detection result, and transmits the detection result to the control unit 12 (main unit). Control means in the invention).

The storage unit 13 (storage means in the present invention)
While storing the program, as shown in FIG.
It stores three threshold / band condition tables: a handset threshold / band condition table, a hands-free threshold / band condition table, and an earphone threshold / band condition table. In this case, the storage unit 13 stores, as the threshold / band condition tables for the handset use state, the hands-free use state, and the earphone use state, four tables of an audio power threshold, an audio power difference threshold, a band power threshold, and a frequency component threshold. The threshold value is stored as a value at which the VOX function is optimal, and a band condition indicating a frequency band is stored.

When the control unit 12 receives the detection result from the use state detection unit 6, the control unit 12 selects one of the three threshold / band condition tables stored in the storage unit 13 according to the input detection result. The threshold / band condition table is selected, at least one of the four threshold values stored in the selected threshold / band condition table is selected, the selected threshold is read, and in some cases, the selected threshold is read. , The band condition stored in the selected threshold / band condition table is also read.

Then, the control unit 12 outputs the threshold or the band condition read from the storage unit 13 to the VOX threshold / band condition setting unit 14, and the VOX threshold / band condition setting unit 14
When a threshold value or band condition is input from the control unit 12, the input threshold value or band condition is changed to the above-described VOX control unit 1.
Output to 0.

When only the threshold value is input from the VOX threshold / band condition setting unit 14, the VOX control unit 10
When the transmission voice is input from the conversion unit 9, the physical quantity related to the input transmission voice is compared with the threshold value input from the VOX threshold / band condition setting unit 14 to determine a sound section or a silent section. The result of the determination is output to the speech encoding unit 11 and the transmission control unit 15 described above.

Further, the VOX control unit 10 sets the VOX threshold /
When the threshold and the band condition are input from the band condition setting unit 14, when the transmission voice is input from the A / D conversion unit 9,
By comparing the physical quantity related to the frequency band indicated by the band condition in the input transmitted voice with the threshold value input from the VOX threshold / band condition setting unit 14, a sound section or a silent section is determined, and the determination result is obtained. Is output to the speech encoding unit 11 and the transmission control unit 15 described above.

Upon receiving the transmission voice from the A / D converter 9, the voice coding unit 11 codes the input transmission voice according to a predetermined voice coding algorithm and inputs the voice from the VOX control unit 10. If the determination result indicates that the section is a voiced section, the transmission voice is output to the transmission path encoding section 16.

The transmission line encoding unit 16 is provided with the speech encoding unit 11
When the transmission voice is input from the, the input transmission voice is subjected to transmission path coding such as error correction and bit rearrangement, and is output to the modulation unit 17. Upon receiving the transmission voice from the transmission line encoding unit 16, the modulation unit 17 modulates the input transmission voice, outputs the transmission voice to the wireless transmission unit 18, and the wireless transmission unit 18 When the transmission voice is input from the unit 17,
The input transmission voice is transmitted as a transmission radio wave from the antenna 18a.

Here, in the above-described configuration, if the determination result input from VOX control section 10 indicates a voiced section, transmission control section 15 provides modulation section 17 and radio transmission section 18 with a predetermined level. Power, and conversely,
If the determination result input from the VOX control unit 10 indicates a silent section, the supply of power at a predetermined level to the modulation unit 17 and the radio transmission unit 18 is stopped or the power to be supplied is set to less than the predetermined level. In a silent section, power consumption of the mobile phone 1 can be reduced.

Next, the operation of the above configuration will be described with reference to FIG.
This will be described with reference to FIG. In this case, as shown in FIG.
Only the audio power threshold is read from the storage unit 13, that is,
It is assumed that the audio power difference threshold, the band power threshold, and the frequency component threshold, which are thresholds other than the audio power threshold, are not read from the storage unit 13 and that the band condition is not read from the storage unit 13.

The control unit 12 performs the following processing by executing a program stored in the storage unit 13. That is, the control unit 12 first determines whether or not a request (event) for detecting the use state of the mobile phone 1 has occurred (step S1). Here, when a request to detect the use state of the mobile phone 1 is issued, the control unit 12 determines “YES” in step S1, and determines the detection result input from the use state detection unit 6 (step S2).
The usage state at that time is detected (the first state in the present invention)
Procedure), it is determined whether the use state at that time is the same as the use state immediately before (step S3).

Here, if the use state at that time and the immediately preceding use state are different from each other,
In step S3, "NO" is determined, and the threshold / band condition table for handsets, the threshold / band condition table for hands-free, and the threshold / band condition for earphones are thereafter determined according to the detection result input from the use state detection unit 6. One of the three threshold / band condition tables is selected from the three threshold / band condition tables, and here, only the audio power threshold is read from the selected threshold / band condition table (the first threshold in the present invention). Step 2).

That is, if the detection result input from the use state detection unit 6 indicates the use state of the handset, the control unit 12 determines “YES” in step S4 and selects the handset threshold / band condition table. And
The voice power threshold (THS_P) is read from the selected handset threshold / bandwidth condition table (step S).
5).

Then, the control unit 12 outputs the audio power threshold value (THS_P) read from the storage unit 13 to the VOX threshold / band condition setting unit 14, and the VOX control unit 10 outputs the audio power threshold value (THS_P) read from the storage unit 13. (THS_P) (third procedure in the present invention). Thereby, the VOX control unit 10 compares the power of the transmitted voice input from the A / D conversion unit 9 with the voice power threshold (THS_P) which is a threshold for the handset, and determines the power of the transmitted voice as the voice power threshold (THS_P). If it is equal to or greater than (THS_P), it is determined to be a voiced section, while if the power of the transmitted voice is less than the voice power threshold (THS_P), it is determined to be a silent section.

If the detection result input from the use state detector 6 indicates a hands-free use state, the controller 12 determines “NO” in step S4 and determines “YES” in step S6. Then, a hands-free threshold / band condition table is selected, and the audio power threshold (THF_P) is read from the selected hands-free threshold / band condition table (step S7).

Then, the control unit 12 outputs the audio power threshold value (THF_P) read from the storage unit 13 to the VOX threshold / band condition setting unit 14, and the VOX control unit 10 outputs the audio power threshold value (THF_P) read from the storage unit 13. (THF_P) (third procedure in the present invention). As a result, the VOX control unit 10 compares the power of the transmitted voice input from the A / D converter 9 with the voice power threshold (THF_P), which is a hands-free threshold, and determines that the power of the transmitted voice is the voice power threshold. If it is equal to or greater than (THF_P), it is determined to be a voiced section, while if the power of the transmitted voice is less than the voice power threshold (THF_P), it is determined to be a silent section.

Further, the control unit 12 controls the use state detection unit 6
If the detection result input from indicates that the earphone is in use, “NO” is determined in step S4, “NO” is determined in step S6, and the earphone threshold /
A band condition table is selected, and an audio power threshold (TEM__) is selected from the selected earphone threshold / band condition table.
P) is read (step S8).

Then, the control section 12 outputs the audio power threshold (TEM_P) read from the storage section 13 to the VOX threshold / band condition setting section 14, and the VOX control section 10 reads the audio power threshold (TEM_P) read from the storage section 13 The operation is performed based on (TEM_P) (third procedure in the present invention). Thereby, the VOX control unit 10 compares the power of the transmitted voice input from the A / D converter 9 with the voice power threshold (TEM_P) which is a threshold for the earphone, and determines that the power of the transmitted voice is the voice power threshold (TEM_P). If it is equal to or more than (TEM_P), it is determined to be a voiced section. On the other hand, if the power of the transmitted voice is less than the voice power threshold (TEM_P), it is determined to be a silent section.

Although the above description has been given of the configuration in which only the audio power threshold value is read from each threshold / band condition table, the present invention is not limited to reading only the audio power threshold value. A configuration may be employed in which any one of the power threshold and the frequency component threshold is read out, or a configuration in which a plurality of thresholds among these four thresholds are read out in combination.

In this case, if the voice power difference threshold is read, the control unit 12 compares the power per unit time of the transmitted voice with the voice power difference threshold, and Is greater than or equal to the audio power difference threshold, it is determined to be a voiced section, while if the power of the transmitted voice per unit time is less than the voice power difference threshold, it is determined to be a silent section.

If the band power threshold is read, the control unit 12 compares the power of the specific band of the transmitted voice with the band power threshold, and determines whether the power of the specific band of the transmitted voice is the band power threshold. If the power is greater than or equal to the threshold, it is determined to be a voiced section, while if the power of the specific band of the transmitted voice is less than the band power threshold, it is determined to be a silent section.

Further, if the frequency component threshold is read, the control unit 12 compares the frequency component (for example, reflection coefficient) of the transmitted voice with the frequency component threshold, and determines that the frequency component of the transmitted voice is the frequency component threshold. If it exceeds, it is determined to be a silent section.

As described above, according to the first embodiment, at least one of the four thresholds of the audio power threshold, the audio power difference threshold, the band power threshold, and the frequency component threshold is used by the mobile phone 1. Read according to the state, the power of the transmitted voice, the power per unit time of the transmitted voice, the power of the specific band of the transmitted voice, and at least one of the four physical quantities related to the transmitted voice of the frequency component of the transmitted voice. One physical quantity is compared with the read threshold value, and based on the comparison result, the supply of power to the modulation unit 17 and the radio transmission unit 18 which are a part of the transmission system is stopped or the supplied power is reduced. As described above, 4
By setting a value suitable for each of the use state of the handset use state, the hands-free use state and the earphone use state as one threshold value, the VOX function can be accurately performed even when the mobile phone 1 is in any use state. It can be operated, and thereby, it is possible to prevent sound quality from being deteriorated.

In this case, the hands-free microphone 3
And the connection state of the earphone microphone 4 is automatically detected to detect which of the use states has transited. Therefore, by not connecting both the handsfree microphone 3 and the earphone microphone 4, In the use state of the handset, the VOX function optimal for the use state of the handset can be automatically operated properly. Also, the hands-free microphone 3 is connected, and the handset is mounted on a cradle (not shown) or mounted thereon. By setting them in the same state, in the hands-free use state, the VOX function most suitable for the hands-free use state can be automatically and accurately operated. Further, by connecting the earphone microphone 4, in the earphone use state, , Automatically, the best VO for earphone usage
The X function can work properly.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
An embodiment will be described with reference to FIG. The description of the same parts as in the first embodiment is omitted, and different parts will be described below. In the above-described first embodiment, the threshold value having the same unit is read from the threshold / band condition table in each of the handset use state, the hands-free use state, and the earphone use state. In the second embodiment, thresholds having different units are read out.

That is, as shown in FIG. 5, when the handset is in use, the control unit 12 determines two thresholds, for example, a voice power threshold (THS_P) and a frequency component threshold (THS_r) from the handset threshold / band condition table. And the VOX control unit 10 compares the power of the transmitted voice with the voice power threshold (THS_P) and the frequency component of the transmitted voice with the frequency component threshold (THS_r), that is, By comparing two physical quantities related to the speech sound with a threshold value, a sound section or a silent section is determined.

When the control unit 12 is in the hands-free use state, the control unit 12 obtains, for example, one of only the audio power threshold (THF_P) from the hands-free threshold / band condition table.
The VOX control unit 10 reads out the three thresholds, and compares the power of the transmission voice with the voice power threshold (THF_P), that is, by comparing one physical quantity related to the transmission voice with the threshold. A sound section or a silent section is determined.

Further, when the earphone is in use, the control unit 12 reads two thresholds, for example, a voice power threshold (TEM_P) and a frequency component threshold (TEM_r) from the earphone threshold / band condition table, and
The VOX control unit 10 compares the power of the transmitted voice with the voice power threshold (TEM_P) and compares the frequency component of the transmitted voice with the frequency component threshold (TEM_r). By comparing the two physical quantities with a threshold, a sound section or a silent section is determined.

As described above, according to the second embodiment, the same functions and effects as those of the first embodiment can be obtained. In particular, in this case, if the mobile phone 1 has transitioned to the handset use state or the earphone use state,
The VOX function is activated based on the two thresholds of the audio power threshold and the frequency component threshold. On the other hand, if the mobile phone 1 has transitioned to the hands-free use state, the VOX function is activated based on only one of the audio power thresholds. In general, it is hardly affected by ambient sounds when using the handset or earphones, while it is easily affected by ambient sounds when using the handsfree. In the state or the earphone use state, in addition to comparing the power of the transmitted voice with the voice power threshold value, the frequency component of the transmitted voice is compared with the frequency component threshold value.
The function can work properly.

(Third Embodiment) Next, a third embodiment of the present invention will be described.
An embodiment will be described with reference to FIGS.
The description of the same parts as in the first embodiment is omitted,
Hereinafter, different parts will be described. In the first embodiment described above, one threshold / band condition table is stored for each of the handset use state, the hands-free use state, and the earphone use state, that is, one handset threshold / The band condition table is stored, one hands-free threshold / band condition table is stored for the hands-free use state, and one earphone threshold / band condition table is stored for the earphone use state. On the other hand, in the third embodiment, a plurality of threshold / band condition tables are stored for each use state.

That is, the storage unit 13 stores the information shown in FIGS.
As shown in FIG. 6, three threshold / band condition tables of threshold / band condition tables A to C are stored for each of the handset use state, the hands-free use state, and the earphone use state. , As a whole, nine threshold / band condition tables are stored.

The storage unit 13 stores, as the threshold / band condition table A (see FIG. 6), an audio power threshold, an audio power difference threshold, and a band in each of the handset use state, the hands-free use state, and the earphone use state. The power threshold value is stored as a value larger than the value at which the VOX function is optimal, and the frequency component threshold value is stored at a value smaller than the value at which the VOX function is optimal, that is, a threshold / band condition table described later. Compared to B,
Each threshold is set to a value at which the VOX function works easily.

The storage unit 13 stores the threshold / band condition table B (see FIG. 7) as
In each of the hands-free use state and the earphone use state, the audio power threshold, the audio power difference threshold, the band power threshold, and the frequency component threshold are stored as values that make the VOX function optimal.

Further, the storage unit 13 stores, as the threshold / band condition table C (see FIG. 8), an audio power threshold, an audio power difference threshold, and a band in each of the handset use state, the hands-free use state, and the earphone use state. The power threshold is stored at a value smaller than the value at which the VOX function is optimal, and the frequency component threshold is stored at a value larger than the value at which the VOX function is optimal, that is, the threshold / band condition table described above. Compared to B,
Each threshold is set to a value at which the VOX function is unlikely to work.

As described above, according to the third embodiment, the same functions and effects as those of the first embodiment can be obtained. In particular, in this case, the threshold / band condition table A
By reading each threshold from the threshold / band condition table A of the threshold / band condition table C, the VOX function can be easily operated, while the threshold / band condition table A to the threshold By reading each threshold value from the threshold value / band condition table C of the / band condition table C, it is possible to make it difficult to operate the VOX function, thereby making the degree of operating the VOX function variable. be able to.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described.
An embodiment will be described with reference to FIG. The description of the same parts as in the first embodiment is omitted, and different parts will be described below. In the above-described first embodiment, in each of the handset use state, the hands-free use state, and the earphone use state, only the threshold value is read out, and the band condition is not read out. In contrast to this, in the fourth embodiment, the physical quantity in the same frequency band is compared with a threshold value. Thus, in each use state, the physical quantity of the transmitted voice in different frequency bands is compared with a threshold value.

That is, the storage unit 13 stores the handset band condition (fHS_B) and the earphone band condition (fHS_B).
EM_B) is, for example, 0.3 kHz to 3.4 kHz.
(One predetermined frequency band in the present invention),
On the other hand, as the hands-free band condition (fHF_B), for example, 0.5 kHz to 3.4 kHz (other predetermined frequency band in the present invention) excluding the low frequency band from the above 0.3 kHz to 3.4 kHz is stored. I have.

As shown in FIG. 9, when the handset is in use, the control unit 12 reads, for example, the audio power threshold (THS_THR) from the handset threshold / bandwidth condition table.
P) and the band condition (fHS_B), and the VOX control unit 10 compares the power in the frequency band indicated by the band condition in the transmitted voice with the voice power threshold (THF_P). A sound section or a silent section is determined.

When the control unit 12 is in the hands-free use state, the control unit 12 reads, for example, the audio power threshold (THF_P) from the hands-free threshold / band condition table, and also reads the band condition (fHF_B).
The OX control unit 10 sets the power in the frequency band indicated by the band condition in the transmitted voice to a voice power threshold (THF_
By comparing with P), a sound section or a silent section is determined.

Further, when the earphone is in use, the control section 12 reads, for example, the audio power threshold (TEM_P) from the earphone threshold / band condition table, and also reads the band condition (fEM_B), and then the VOX.
The control unit 10 determines a sound section or a silent section by comparing the power in the frequency band indicated by the band condition in the transmitted voice with the voice power threshold (TEM_P).

As described above, according to the fourth embodiment, the same functions and effects as those of the first embodiment can be obtained. In particular, in this case, if the mobile phone 1 has transitioned to the handset use state or the earphone use state,
The VOX function is activated based on the band condition of the frequency band of 0.3 kHz to 3.4 kHz. On the other hand, if the mobile phone 1 has transitioned to the hands-free use state, the VOX function is 0.3 kHz to 3.4 kHz.
Since the VOX function is operated based on the band condition of the frequency band of 0.5 kHz to 3.4 kHz, for example, excluding the low frequency band from the 3.4 kHz frequency band, in general, in the hands-free use state, In view of the fact that it is often used in a car and is easily affected by the low frequency band of the ambient sound during driving, the VOX function can be properly operated by excluding the low frequency band.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described.
An embodiment will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different parts will be described. In the above-described first embodiment, the threshold / band condition table is selected according to the detection result of detecting the connection state of the handsfree microphone 3 and the earphone microphone 4. In the fifth embodiment, the threshold / band condition table is selected in accordance with the detection result of detecting a key operation.

That is, in the portable telephone 21, the operation section 22 (operation means in the present invention) is used to input a call start key for starting a call, a call end key for ending a call, and a telephone number. A number of keys such as numeric keys “0” to “9” and function keys (function keys) for setting and releasing various functions are arranged. When a key operation is performed, the key operation is performed. The key operation notification is output to the control unit 23 (control means in the present invention).

When a key operation notification is input from the operation unit 22, the control unit 23 detects a key operation according to the input key operation notification, selects a threshold / band condition table according to the detection result, At least one of the four thresholds stored in the selected threshold / bandwidth condition table
Select one threshold, read the selected threshold,
In some cases, the band condition stored in the selected threshold / band condition table is also read.

The control unit 23 outputs a switching command to the switching unit 24 according to the detection result. When the switching unit 24 receives the switching command from the control unit 23, the switching unit 24 sends the switching command according to the input switching command. Switch the route of the spoken voice.

As described above, according to the fifth embodiment, the same functions and effects as those of the first embodiment can be obtained. In particular, in this case, the threshold or the band condition is read in accordance with the operation on the operation unit 22 and the VOX function is operated based on the read threshold or the band condition. Regardless of the use state of the mobile phone 1, the VOX function can be properly operated manually.

(Other Embodiments) The present invention is not limited to the above embodiment, but can be modified or expanded as follows. The mobile phone is not limited to a mobile phone, and may be a vehicle-mounted phone.
C (Personal Digital Cellular) telephone, CD
A telephone of an MA (Code Division Multiple Access) system or a telephone employing another communication system may be used.

In the third embodiment, the threshold value /
The number of band condition tables is not limited to “9” and may be any other number. Further, any threshold / band condition table may be selected according to key operation. good. In the fourth embodiment, the frequency band of the band condition in each use state is not limited to 0.3 kHz to 3.4 kHz or 0.5 kHz to 3.4 kHz, and may be another frequency band. A plurality of thresholds may be used for one physical quantity. For example, two thresholds are prepared as audio power thresholds, and a state in which the power of the transmission audio is less than one audio power threshold is continued for a certain period of time. If the power of the transmitted voice is equal to or higher than the other voice power threshold, the configuration may be such that it is determined to be a voiced section.

In each embodiment, the program for performing the above-described processing is not limited to the program stored in the storage unit from the beginning (for example, at the stage of commercialization), and may be, for example, downloaded from a specific server to a mobile telephone through a network. Alternatively, transfer from a storage medium such as a card to the mobile phone,
It may be installed.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an electrical configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a threshold / band condition table;

FIG. 3 is a diagram illustrating a relationship between a use state and a threshold / band condition.

FIG. 4 is a flowchart showing control contents.

FIG. 5 is a view corresponding to FIG. 3, showing a second embodiment of the present invention;

FIG. 6 is a view corresponding to FIG. 2, showing a third embodiment of the present invention.

FIG. 7 is a diagram corresponding to FIG. 6;

FIG. 8 is a diagram corresponding to FIG. 6;

FIG. 9 is a view corresponding to FIG. 3, showing a fourth embodiment of the present invention;

FIG. 10 is a functional block diagram showing an electrical configuration of a fifth embodiment of the present invention.

[Explanation of symbols]

In the drawings, 1 is a mobile phone (mobile phone), 2 is a handset microphone, 3 is a hands-free microphone, 4 is an earphone microphone, 6 is a use state detection unit (use state detection means), 10
Denotes a VOX control unit (VOX control unit), 12 denotes a control unit (control unit), 13 denotes a storage unit (storage unit), 21 denotes a mobile phone (mobile telephone), 22 denotes an operation unit (operation unit), and 23 denotes a control unit. (Control means).

Claims (11)

[Claims] 1. A VOX control means for stopping supply of power to a part of a transmission system or reducing supply power based on a comparison result of comparing a physical quantity relating to a transmission voice with a threshold value, A mobile telephone comprising control means for controlling the operation of the control means, wherein the mobile telephone is configured to be capable of transitioning to a plurality of use states; a storage means for storing a plurality of threshold values corresponding to the plurality of use states; And a use state detecting means for detecting which use state of the plurality of use states the telephone has transitioned to, and wherein the control means comprises a plurality of threshold values stored in the storage means. A threshold value is selected according to the detection result of the use state detecting means, and based on the selected threshold value, the VOX
A mobile telephone characterized by operating control means. 2. A handset use state in which a voice input by a handset microphone is processed as a transmission voice, a hands-free use state in which a voice input by a hands-free microphone is processed as a transmission voice, and an earphone microphone. 2. The mobile telephone according to claim 1, wherein the mobile phone is configured to be able to transit to any one of the earphone use states for processing the input voice as the transmission voice. 3. The use state detecting means automatically detects a connection state of the hands-free microphone and the earphone microphone, thereby detecting the use state of the handset.
The mobile telephone according to claim 2, wherein the mobile phone detects which of the hands-free use state and the earphone use state has transited. 4. The use state detection means transitions to the hands-free use state by detecting a state in which the hands-free microphone is connected and the handset is attached to a cradle or equivalent thereto. The mobile phone according to claim 3, wherein the mobile phone detects that the mobile phone is present. 5. The VOX control means is configured to compare at least one physical quantity of a plurality of physical quantities having different units as a physical quantity related to a transmission voice with a threshold value, and the control means includes: When the use state detection means detects that the state has transitioned to the use state, at least one threshold having one unit is selected, and the VOX control means is selected based on the selected at least one threshold. Is operated, and when the use state detecting means detects that the state of use has transitioned to another use state different from the one use state, at least one of the at least one unit having another unit different from the one unit Selecting another threshold and based on the selected at least one other threshold, the VO
5. The mobile telephone according to claim 1, wherein said mobile telephone operates X control means. 6. The VOX control means is configured to compare the power of the transmitted voice or the frequency component of the transmitted voice with a threshold value as a physical quantity related to the transmitted voice, When the use state detection unit detects that the earphone use state has been changed, a threshold value related to the power of the transmission voice and a threshold value related to the frequency component of the transmission voice are selected, and the selected transmission voice The VOX control means is operated based on a threshold value related to power and a threshold value related to a frequency component of the transmission voice, and when the usage state detection means detects that the state is changed to the hands-free usage state, the transmission voice is transmitted. Selecting a threshold value related to the power of the transmitted voice, and operating the VOX control means based on the selected threshold value related to the power of the transmission voice. 5 mobile telephone described. 7. The mobile telephone according to claim 1, wherein said storage means stores a plurality of different thresholds having the same unit in the same use state. 8. The storage means is configured to store a plurality of band conditions corresponding to the plurality of use states, and the control means detects that the use state has transitioned to one use state. When the means detects, one band condition having one predetermined frequency band is selected, and the VOX control means is operated based on the selected one band condition,
When the use state detection unit detects that the one use state is transited to another use state different from the one use state, another band having another predetermined frequency band different from the one predetermined frequency band is used. 8. The mobile telephone according to claim 1, wherein a condition is selected, and the VOX control means is operated based on the selected other band condition. 9. The control means selects one band condition having one predetermined frequency band when the use state detection means detects a transition to the handset use state or the earphone use state. Operating the VOX control means based on the selected one band condition, and when the use state detection means detects that the state has transitioned to the hands-free use state, the one predetermined frequency band and 9. The mobile telephone according to claim 8, wherein another band condition having another different predetermined frequency band is selected, and the VOX control means is operated based on the selected other band condition. 10. The control unit selects a threshold value corresponding to a predetermined operation by an operation unit from a plurality of threshold values stored in the storage unit, and operates the VOX control unit based on the selected threshold value. The mobile telephone according to any one of claims 1 to 9, wherein the mobile telephone is operated. 11. A first procedure for detecting which of a plurality of use states the mobile phone has transitioned to in a control means of the mobile phone, and a plurality of threshold values stored in the storage means. The first of which
And stopping the supply of power to a part of the transmission system based on a comparison result of comparing the physical quantity related to the transmission voice with the threshold value, or A program for causing a VOX control unit that reduces supplied power to operate based on a threshold value selected in the second procedure.