JPH10210134A - Portable telephone and its transmitting level controlling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer an agreeable voice and to perform conversation on a more natural voice level on which a speaking way has intonation in a portable telephone which decides the level of an inputted voice signal and automatically adjusts the amplitude ratio of a transmitting amplifier. SOLUTION: When a transmitting level measurement request signal is received, a mean level calculating part 63 of a voice processing part 6 calculates a mean input level in a prescribedly fixed time in an inputted voice. A comparing part 84 of a controlling part 8 compares the mean input level that is received with a reference input level that is preliminarily stored. As a result of the comparison, an amplitude ratio deciding part 85 calculates an amplitude ratio that is applied to a transmitting amplifier 5 and controls an electronic variable resistor 52 of the amplifier 5 based on the calculated amplitude ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone and a transmission level control method therefor, and more particularly to a portable telephone capable of automatically adjusting a transmission amplification factor according to a transmission input level and a transmission level control method therefor.

[0002]

2. Description of the Related Art Conventionally, this kind of portable telephone has been used for the purpose of enabling smooth and comfortable voice transmission. For example, Japanese Patent Application Laid-Open No. H5-244031 discloses that the levels of voice and ambient noise are determined, and the sensitivity of a transmitter of a wireless communication device or the amplification of a voice amplifier for transmission is automatically changed to an optimum value. The technology is described.

FIG. 4 is a block diagram showing an example of a conventional portable telephone. The mobile phone 10 includes at least a receiver amplifier 2, a receiver 3, a transmitter 4, a transmitter amplifier 5, a voice processing unit 60, a transmission / reception unit 7, and a control unit 80. The audio signal input to the transmitter 4 is amplified by the transmission amplifier 5, modulated by the transmission / reception unit 7, and transmitted to the other party.

[0004] In the mobile phone shown in FIG.
Determines the level of the audio signal input to the transmitter 4,
By automatically varying the amplification factor of the transmission amplifier 5 and controlling the output level of the transmission voice signal to be always constant, even if the transmission input level of the mobile phone fluctuates, the reception level of the other party will change. Is set to a certain level.

[0005]

The problem with both the wireless communication device and the portable telephone described above is that when the receiving level of the other party becomes constant, the transmission of the words themselves is improved, but the inflection of the speaking style is reduced. Less conversations and unnatural conversations.

The reason for this is that the amplification factor of the transmission amplifier is constantly varied in conjunction with the input level so that the transmission voice level is kept constant.

An object of the present invention is to determine an amplification factor to be applied to a transmission amplifier from an input voice level measured at a predetermined fixed time at the start of a call or when a specific operation is input, and to use the amplification factor to control the transmission amplifier. It is an object of the present invention to provide a mobile phone capable of performing comfortable voice transmission by controlling the voice and having a more natural voice level conversation with inflection in speaking style, and a transmission level control method thereof.

[0008]

A portable telephone according to the present invention comprises:
Processing means for calculating an average transmission level of an input audio signal in a predetermined period of time based on a transmission level measurement request signal in a mobile phone which determines a level of an input audio signal and automatically adjusts an amplification factor of a transmission amplifier. And control means for comparing the calculated average transmission level with a pre-registered reference input level to determine an amplification factor to be applied to the transmission amplifier, and amplifying the audio signal by the determined amplification factor. And means for generating the transmission level measurement request signal at the start of a call or at any time by a predetermined operation input during a call. The transmission amplifier includes an operational amplifier and an electronic volume in a stage preceding the operational amplifier, and the control unit controls the electronic volume based on the amplification factor.

The present invention also provides a method for controlling a transmission level in a portable telephone, comprising: determining a level of an input audio signal and automatically adjusting an amplification factor of a transmission amplifier; When a level measurement request signal is received, an average input level for a predetermined period of time of the input voice is calculated, and the calculated average input level is compared with a pre-registered reference input level. The transmission amplifier is controlled based on the obtained amplification factor, and the transmission level measurement request signal is generated at the start of a call or at any time by a predetermined operation input during a call.

According to the present invention, the automatic adjustment of the transmission level is not performed over the entirety of the call, but is performed based on the amplification factor obtained during a predetermined period of time. Since the reception level on the side is not fixed, the inflection of the conversation can be transmitted, so that a more natural conversation can be performed.

[0011]

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

Referring to FIG. 1, a portable telephone 1 includes at least a receiving amplifier 2 for amplifying an electric signal from the other party.
A receiver 3 for converting an electric signal amplified by the receiving amplifier 2 into a voice, a transmitter 4 for converting an externally input voice into an electric signal, and a transmitter for amplifying the electric signal from the transmitter 4 An amplifier 5, an audio processing unit 6 for performing A / D or D / A conversion of an audio electric signal and measuring a transmission level;
A transmission / reception unit 7 for transmitting / receiving and modulating / demodulating data for performing wireless communication; a control unit 8 for determining an amplification factor of the transmission amplifier 5 based on a transmission level measurement result and controlling various operations of the mobile phone; And an operation unit 9 for inputting information and the like.

FIG. 2 is a block diagram showing details of the transmission amplifier 5, the voice processing unit 6, the control unit 8 and the operation unit 9 in FIG. 1. The transmission amplifier 5 includes an operational amplifier 51 and an electronic volume 52. Prepare. The audio processing unit 6 includes a level measurement request receiving unit 61 that receives the transmission level measurement request signal a.
An A / D converter 62 (the D / A converter is not shown);
An average level calculator 63 for calculating an average transmission level of the input audio signal for a predetermined period of time based on the transmission level measurement request signal a. The control unit 8 includes a level measurement request transfer unit 81 for transmitting the transmission level measurement request signal a, a level information reception unit 82 for receiving the average transmission level calculated by the average level calculation unit 63, and a reference registered in advance. A reference value storage unit 83 in which the input level and the reference amplification factor are stored, a comparison unit 84 that compares the received level information with the reference input level, and determines an amplification factor to be applied to the transmission amplifier 5 based on the comparison result. And an amplification factor determining unit 85 for amplifying the audio signal according to the determined amplification factor. The operation unit 9 includes a level measurement request signal generation unit 91 that generates a transmission level measurement request signal a at the start of a call or at an arbitrary time according to a predetermined operation input during a call.

Next, referring to FIGS. 1, 2 and 3,
The operation of the embodiment of the present invention will be described.

Normally, during a call, a call voice is input from the transmitter 4 and converted into an electric signal. This electric signal is amplified by the transmission amplifier 5 and input to the voice processing unit 6. Control unit 8
Determines whether or not a call has been started or whether or not a specific operation input for measuring the transmission level has been made on the operation unit 9 (step 1; referred to as S1). Is detected, the received transmission level measurement request signal is transferred to the voice processing unit 6 (S2), and the transmission level measurement is started (S3). Here, "specific operation input" means that any key on the keyboard which is an operation unit has the function, such as "press a key for one second", and the function is started by long pressing. ,
Normal short pressing means performing the operation of a numeric key.

When the transmission level measurement request signal is received, the voice processing unit 6 performs a predetermined period of time from the value of the A / D-converted input signal, for example, after the voice path of the telephone has passed, and then the voice processing unit 6 The transmission level is measured for only two to three seconds, which is the time required to complete one sentence of the conversation from the point of input, the average level is calculated, and the calculated value is reported to the control unit 8 (S4).

Next, the control section 8 receives the calculated average level information (S5), compares the received average level information with the reference input level (S6), and determines the result based on the reference amplification factor. The amplification factor of the transmission amplifier 5 is determined so that the reception level of the other party becomes appropriate (S7). The reference amplification factor is an amplification factor set such that the output level becomes a specified value with respect to a specified input level at the time of factory shipment or the like, and is adjusted and set for each telephone. And
The obtained amplification factor is notified to the transmission amplifier 52 (S
8). The transmission amplifier 5 controls the total gain of the transmission amplifier 5 by controlling the value of the electronic volume based on the amplification factor.

As described above, the automatic adjustment of the transmission level is not performed over the entirety of the call, but is performed using the amplification rate obtained during a predetermined period of time, so that the transmission amplification rate during the call changes. No. That is, a person who speaks small on average has a large amplification factor, and a person who speaks large has a small amplification factor. Therefore, the other party's reception level during a call is an appropriate level, and the level is not fixed, so that a natural conversation with an inflection in the way of speaking can be performed.

[0019]

As described above, according to the present invention, when a transmission level measurement request signal is received in a portable telephone which determines the level of an input voice signal and automatically adjusts the amplification factor of a transmission amplifier. Calculate the average input level of the input voice for a predetermined period of time, compare the calculated average input level with a pre-registered reference input level to obtain an amplification factor to be applied to the transmission amplifier. By controlling the transmission amplifier based on the obtained amplification factor, comfortable voice transmission is possible, and conversation at a more natural voice level with inflection in speaking style can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of a mobile phone according to the present invention.

FIG. 2 is a block diagram showing details of a transmission amplifier, a voice processing unit, a control unit, and an operation unit in FIG. 1;

FIG. 3 is a flowchart showing a procedure of a transmission level control method in the mobile phone of the present invention.

FIG. 4 is a block diagram illustrating an example of a conventional mobile phone.

[Explanation of symbols]

 Reference Signs List 1 mobile phone 2 receiver amplifier 3 receiver 4 transmitter 5 transmitter amplifier 6 voice processor 7 transmitter / receiver 8 controller 9 operation unit 51 operational amplifier 52 electronic volume 61 level measurement request receiver 62 A / D converter 63 average level calculation Unit 81 level measurement request transfer unit 82 level information reception unit 83 reference value storage unit 84 comparison unit 85 amplification factor determination unit 91 level measurement request signal generation unit

Claims (5)

[Claims] 1. A portable telephone which judges a level of an input audio signal and automatically adjusts an amplification factor of a transmission amplifier.
Processing means for calculating an average transmission level of the input voice signal for a predetermined period of time based on the transmission level measurement request signal; and comparing the calculated average transmission level with a pre-registered reference input level for the transmission. And a control means for determining an amplification factor to be applied to the talk amplifier and amplifying the audio signal by the determined amplification factor. 2. The mobile phone according to claim 1, further comprising means for generating the transmission level measurement request signal at the start of a call or at an arbitrary time by a predetermined operation input during the call. 3. The transmission amplifier according to claim 1, wherein the transmission amplifier includes an operational amplifier and an electronic volume at a stage preceding the operational amplifier, and the control unit controls the electronic volume based on the amplification factor. Mobile phone. 4. A transmission level control method for a mobile phone, which determines the level of an input audio signal and automatically adjusts the amplification factor of a transmission amplifier. Average input level during a predetermined period of time is calculated, and the calculated average input level is compared with a previously registered reference input level to determine an amplification factor to be applied to the transmission amplifier. A transmission level control method for a mobile phone, comprising: 5. The transmission level control method for a mobile phone according to claim 4, wherein said transmission level measurement request signal is generated at the start of a telephone call or at an arbitrary time by a predetermined operation input during a telephone call.