JPH1168646A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a portable telephone set to make a speech in a public place without giving nuisance to surrounding persons. SOLUTION: A telephone set is provided with a digital signal processing circuit 5 that applies amplification processing to a transmission voice signal, and when an automatic sound volume adjustment key 22A is operated at a speech start or during a speech, a control section 20 detects it to provide an output of an amplification instruction signal of the transmission voice to the digital signal processing circuit 15. Then the digital signal processing circuit 15 increases the range of voice data picked up by a microphone 19 and outputted from a voice CODEC 14 up to a prescribed voice range and amplifies the data so that the level of the voice signal increased up to a prescribed sound frequency band reaches a prescribed level, and the result is outputted to a channel CODEC 16. As a result, even when a talker speaks in a low voice during the speech, the voice signal is increased up to a prescribed voice range and amplified, and the amplified signal is sent to a base station via the channel CODEC 16, a MODEM modulator 17, a ratio transmission reception section 11 and an antenna AT, thus the signal is sent to a speech opposite party as a proper voice.

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 PHS telephone for making a wireless communication.

[0002]

2. Description of the Related Art This type of portable telephone device capable of making a call by a radio signal through a radio base station can call the other party at any place as long as the radio base station is installed. It can be performed. In addition, this mobile phone device has been rapidly spreading in recent years because it can receive an incoming call from another party and make an incoming call at any place. During a call, a voice signal from the other party is heard as a reception signal via a receiver, and a voice signal uttered by the holder of the portable telephone device is transmitted to the other party as a transmission signal via a microphone.

[0003]

However, since a caller who sends a call to such a portable telephone device cannot know where the bearer of the portable telephone device is located, the holder of the portable telephone device may be in a train or the like. Calls are sent to the owner even when in a public place. In this case, the mobile phone device rings, and the holder responds to the incoming call and makes a call with the caller. However, such a mobile phone call in a public place may cause trouble to the surroundings. Has become apparent in recent years. Therefore, an object of the present invention is to make a call without disturbing the surroundings when making a call with a mobile phone device.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a portable telephone device for performing wireless communication of a voice signal. A conversion means is provided. Therefore, even when the holder of the mobile phone speaks low during a call, the signal from the transmitter is converted to, for example, a large voice signal by the signal conversion means and transmitted to the other party. As a result, when making a call with a mobile phone, particularly in a public place, the call can be made without disturbing the surroundings. Further, the signal conversion means includes:
It amplifies only the signal in the audio frequency band. Further, the signal conversion means raises the sound range of the audio signal to a sound range of a predetermined frequency.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the mobile phone device according to the present invention. This portable telephone device is a PHS telephone, and the PHS telephone has a wireless transmitting / receiving unit 11 for performing wireless communication with a base station (not shown) via an antenna AT.
A modem demodulator 12 for demodulating the received radio signal;
A channel codec 13 for extracting data of a predetermined slot (time slot) in the demodulated signal; a voice codec 14 for performing digital / analog conversion and analog / digital conversion of voice; and outputting voice data as data of a predetermined slot. A channel codec 16 is provided.

The PHS telephone further includes a digital signal processing circuit 15 for digitally processing so that the level of the voice band is amplified when voice data from the voice codec 14 is input, and modulates control data and voice data. A modem modulator 17 for outputting to the wireless transmission / reception unit 11, a receiver (receiver) 18 for taking out a voice signal converted by the voice codec 14 as a reception signal, and a digital voice data for outputting the voice signal to the voice codec 14 as a transmission signal A microphone (transmitter) 19 for converting the data into a digital signal and a control unit 20 for controlling the entire apparatus are provided. The control unit 20 includes a memory 20, a keyboard 22 including an automatic volume adjustment key 22A, a dial key, and the like.
A display 23 and a buzzer 24 for ringing an incoming call are connected.

[0007] Further, the radio transmitting / receiving unit 11 includes an antenna AT
Antenna switch 111 for switching the signal to and from the antenna AT, a receiving amplifier 112 for amplifying the received wireless signal, a first mixer 113 for sequentially removing high-frequency signals from the received wireless signal, A second mixer 114, an intermediate frequency generator 115, a quadrature modulator 116 and a third mixer 117 for superimposing a signal from the modem modulator 17 on a radio frequency high frequency signal, and a transmission amplifier 118 for amplifying a radio signal to be transmitted. A VCO 119A and a PLL unit 119C for providing a signal of a predetermined frequency to the first mixer 113 and the third mixer 117;
VCO 119 for providing a signal having a frequency different from the above-described frequency to second mixer 114 and quadrature modulator 116
B and a PLL unit 119D.

In the PHS telephone configured as described above, when the keyboard 22 is operated to perform a calling operation, the control unit 20 detects this and detects a modem modulator 17.
, And controls the wireless transmission / reception unit 11, so that transmission data via the wireless channel control channel is transmitted from the wireless transmission / reception unit 11 and the antenna AT to the base station side. As a result, when the call of the other party is made and the other party answers, the call is switched to the communication channel and communication with the other party is started via the communication channel.

An incoming signal from a base station via a control channel of a radio channel is transmitted to an antenna AT and a radio transmitting / receiving unit 11.
And receiving the signal via the modem demodulator 12, the control unit 20
Causes the buzzer 24 to ring. Then keyboard 2
When the operation of a call key (not shown) in 2 is detected, it is determined that an incoming call has been answered and a response signal is given to the modem modulator 17 to be transmitted to the base station. After that, the communication channel is switched to the communication channel, and the incoming call is started through the communication channel.

[0010] During such an outgoing call or incoming answering call,
The voice of the other party via the base station enters the voice codec 14 via the route of the antenna AT → the radio transmitting / receiving section 11 → the modem demodulator 12 → the channel codec 13 and is converted from the digital voice data into an analog voice signal by the voice codec 14. The signal is output to the receiver 18 as a reception signal. On the other hand, the audio signal from this device is
The voice codec 14 enters the voice codec 14 as a transmission signal, and is converted into digital voice data by the voice codec 14 and output to the digital signal processing circuit 15.

When no special setting is made in the digital signal processing circuit 15, the input audio data is output to the channel codec 16 as it is. Then, the transmitted voice data is transmitted as a radio signal to the base station through the channel codec 16 → the modem modulator 17 → the radio transmitting / receiving section 11 → the antenna AT. Here, when the user speaks into the microphone 19 with a low voice, the voice input level is naturally low, and the voice frequency at that time is lower than usual. At this time, when the automatic volume control key 22A provided on the keyboard 22 is operated, the control unit 2
0 detects this and outputs a signal for amplifying the transmitted voice to the digital signal processing circuit 15. Then, the digital signal processing circuit 15 increases the frequency of the audio data output from the audio codec 14 to a predetermined audio frequency band,
Further, the signal is amplified so that the level becomes a predetermined value, and is output to the channel codec 16 side. As a result, the transmission voice data raised to a predetermined voice frequency band and raised in level is transmitted as a radio signal to the base station via the modem modulator 17, the radio transmission / reception unit 11, and the antenna AT.

As described above, when the automatic volume control key 22A is pressed at the start of a call or during a call, the microphone 19
The digital signal processing circuit 15 increases the sound range (sound frequency) of the transmitted voice input from the side to a predetermined sound range and amplifies the level so that the level becomes a predetermined level. Even if the voice is a low-frequency and low-level transmission signal of a low volume, it is transmitted to the other party as a transmission sound of a predetermined range and a predetermined level,
Can be heard on the other side. Therefore, this PH
When making a call in a public place using the S telephone, the user can operate the automatic volume control key 22A to speak in a low volume,
As a result, it is possible to avoid annoying surroundings when making a call in a public place.

FIG. 2 is a flowchart showing the operation of the main part of the PHS telephone. The operation of the main part of the present invention will be described in more detail according to this flowchart. FIG.
In step S1 of (a), when an incoming call arrives, the control unit 20 makes the buzzer 24 sound. Then keyboard 2
When the call key in step 2 is operated, the control unit 20 proceeds to step S
It is determined that the "incoming call response" of No. 2 is "Y". In this case, it is determined in step S3 whether or not the automatic volume adjustment key 22A has been pressed.

When the automatic volume control key 22A is pressed, the control section 20 outputs a signal for instructing the digital signal processing circuit 15 to amplify the transmitted voice. Then, the digital signal processing circuit 15 detects the audio frequency band data output from the audio codec 14 in step S4, raises the frequency of the detected audio data to a predetermined frequency, and raises the frequency of the detected audio data to the predetermined frequency. An amplification process is performed in step S5 so that the data level becomes a predetermined level. Then, the transmission voice data which has been raised and amplified to a predetermined range is transferred to the channel codec 16 in step S6. As a result, the transmission voice data whose level has been increased is transmitted to the modem modulator 17, the radio transmission / reception unit 11, and the antenna A.
The signal is transmitted as a radio signal to the base station via T. The voice processing of the digital signal processing circuit 15 is continued until the incoming response call ends.

Here, when the call key on the keyboard 22 is pressed again, the control section 20 regards the end of the call as "end" in step S7 as "Y", and executes a call end process. Together with the digital signal processing circuit 15,
A signal for canceling the amplification instruction signal is transmitted to end the amplification process. On the other hand, when the automatic volume control key 22A is not operated at the start of the call, the amplification instruction signal of the transmission signal is not sent to the digital signal processing circuit 15, so that the digital signal processing circuit 15 The process of transferring the data as it is to the channel codec 16 is performed in step S8. And step S
The process of transferring at the normal sound range and voice level of No. 8 is continued until the end of the call at step S9 becomes “Y”.

Next, in step S11 of FIG. 2 (b), a calling operation is performed. As a result, when a response from the other party is detected and the determination in step S21 becomes "Y", the control unit 2
0 indicates whether or not the automatic volume adjustment key 22A has been pressed in step S
Determine at 23.

When the automatic volume adjustment key 22A is pressed,
The control unit 20 similarly outputs a transmission voice amplification instruction signal to the digital signal processing circuit 15. Then, the digital signal processing circuit 15 detects the voice data output from the voice codec 14 in step S24, raises the frequency of the detected voice data to a predetermined range, and raises the level of the voice data raised to the predetermined range. An amplification process is performed in step S25 so as to have a predetermined size. Then, the transmission voice data which has been raised and amplified to a predetermined range is transferred to the channel codec 16 in step S26. These processes in steps S24 to S26 are continued until the outgoing call ends. Then, when the call key is pressed, the control unit 20 regards the end of the call as "Y" in step S27, executes the call end process, and sends the digital signal processing circuit 15 The amplification process ends.

On the other hand, if the automatic volume adjustment key 22A is not operated at the start of the outgoing call, the transmission signal amplification instruction signal is not sent to the digital signal processing circuit 15, so that
The digital signal processing circuit 15 performs processing of transferring the data of the audio frequency band from the audio codec 14 to the channel codec 16 as it is in step S28. The process of transferring in the normal sound range and voice level in step S28 is continued until the call termination in step S29 becomes "Y".

In each of the above-described operation examples, it is determined whether or not the automatic volume adjustment key 22A has been pressed at the start of a call, and thereafter, each process according to whether or not the automatic volume adjustment key 22A has been pressed continues until the end of the call. However, even if the automatic volume adjustment key 22A is operated during a call, the digital signal processing circuit 1
If the amplification instruction signal is transmitted to 5, the range of the transmission signal can be similarly increased to a predetermined range, and the level can be amplified to a predetermined level. Conversely, by pressing the automatic volume adjustment key 22A during the amplification processing of the transmission voice, the transmission can be performed in the normal sound range and the audio level without performing the amplification processing. Further, in the present embodiment, an example has been described in which the PHS telephone is used as the mobile telephone device, but similar effects can be obtained with other mobile telephones.

[0020]

As described above, according to the present invention, in a portable telephone device for performing wireless communication of voice signals, a signal conversion means for converting a signal from a transmitter and transmitting the converted signal to a communication partner is provided. Therefore, even if the mobile phone holder speaks low during a call, the signal from the transmitter is converted to, for example, a loud voice signal by the signal conversion means and transmitted to the other party. In particular, when a call is made in a public place such as a train, the call can be made without disturbing the surroundings. Further, since the signal conversion means amplifies only the signal in the audio frequency band, amplification of noise outside the audio band is prevented, and as a result, the other party can accurately hear only the audio signal. Also, since the signal conversion means raises the audio signal to a predetermined sound range, the other party can listen to an appropriate audio signal.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation of a main part of the apparatus.

[Explanation of symbols]

11: wireless transmission / reception unit, 12: modem demodulator, 13, 16
... channel codec, 14 ... voice codec, 1
5 ... Digital signal processing circuit, 17 ... Modem modulator, 18
... Receiver (receiver), 19 ... Microphone (transmitter), 20
... Control part, 22 ... Keyboard, 22A ... Automatic volume control key.

Claims (3)

[Claims] 1. A portable telephone device for performing wireless communication of an audio signal, comprising a signal converting means for converting a signal from a transmitter and transmitting the signal to a communication partner. 2. The mobile phone device according to claim 1, wherein the signal conversion unit amplifies only a signal in an audio frequency band. 3. The mobile phone device according to claim 1, wherein the signal conversion unit increases a sound range of the audio signal to a sound range of a predetermined frequency.