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JP2004129112A - Portable wireless communication device - Google Patents

Portable wireless communication device
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Publication number
JP2004129112A
JP2004129112AJP2002293385AJP2002293385AJP2004129112AJP 2004129112 AJP2004129112 AJP 2004129112AJP 2002293385 AJP2002293385 AJP 2002293385AJP 2002293385 AJP2002293385 AJP 2002293385AJP 2004129112 AJP2004129112 AJP 2004129112A
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JP
Japan
Prior art keywords
mode
audio output
receiver
frequency characteristic
output device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002293385A
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Japanese (ja)
Inventor
Noriyuki Sakamoto
坂本 憲之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kokusai Denki Electric Inc
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Hitachi Kokusai Electric Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Kokusai Electric IncfiledCriticalHitachi Kokusai Electric Inc
Priority to JP2002293385ApriorityCriticalpatent/JP2004129112A/en
Publication of JP2004129112ApublicationCriticalpatent/JP2004129112A/en
Pendinglegal-statusCriticalCurrent

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Abstract

Translated fromJapanese

【課題】携帯型無線通信機のスピーカモードとレシーバモードで音声出力装置を共用するとともに、各モードでの出力周波数特性を可変として聞きとり易くする。
【手段】周波数特性が可変制御可能な周波数特性切替手段14を音声出力装置15の前段に設け、通信モード判別信号Mがスピーカ/レシーバのいずれのモードを示しているかに応じて、各モードで聞きとり易い音声出力周波数特性が得られるように切替手段14を制御する。
【選択図】    図1
An audio output device is shared between a speaker mode and a receiver mode of a portable wireless communication device, and an output frequency characteristic in each mode is made variable to facilitate listening.
A frequency characteristic switching means capable of variably controlling the frequency characteristic is provided at a stage prior to the audio output device, and a listening mode is determined in each mode according to which mode of the speaker / receiver is indicated by the communication mode determination signal. The switching unit 14 is controlled so that an easy-to-take sound output frequency characteristic is obtained.
[Selection diagram] Fig. 1

Description

Translated fromJapanese

【0001】
【発明の属する技術分野】
本発明は、音声通信を行う携帯型無線通信機に係り、とくに受信音声をレシーバモードとスピーカモードのいずれかを選択して出力できるようにした携帯型無線通信機に関する。
【0002】
【従来の技術】
音声通信を行う携帯型無線通信機には携帯電話機やトランシーバがあり、携帯電話機においては、使用者が受話部を耳に当て音声を聞く電話モードと、受話部から大きな音声を出力し耳を離して聞くハンズフリーモードの2種類の音声出力モードを有するものがある。また、業務用などの携帯型無線通信機(トランシーバ)においても、プレストーク送受話方式(単信)と同時送受話方式(複信)の二つのモードを有するものが一般的となっており、複信では使用者が受話部を耳に当て音声を聞くレシーバモードであり、単信では受話部から大きな音声を出力し耳を離して聞くスピーカモードとして使用する。
【0003】
図4は、従来の携帯型無線通信機受話系の構成例で、スピーカモード時に音声を出力する音声出力装置(スピーカ)44とレシーバモード時に音声を出力する音声出力装置(レシーバ)45が設けられている。アンテナ41から入力された受信波は受信部42で受信、復調処理され、音声信号は音声処理部43に送られる。この音声信号はスピーカモードの時に音声出力装置44から出力され、またレシーバモード時には別に設けられた音声出力装置45から出力される。多くの携帯型無線通信機ではこのように各モード対応に音声出力装置が設けられているが、1つの音声出力装置を各モードで共用する構成の携帯型無線通信機もある。
【0004】
【発明が解決しようとする課題】
スピーカモードでは音声出力装置から出力された音声振動は空間に広く伝播して耳に達するが、レシーバモードでは音声出力装置から出力された音声振動は狭い耳口内に直接入ってくる。このため、音声振動のレベルをレシーバモードではスピーカモードに比べて充分小さくすると同時に、音声振動の伝播路特性の違いから、音声出力装置から出力される音声信号の出力周波数スペクトルもそれぞれのモードに適したものとすることで聞きとり易さがよくなる。この聞きとり易さという点を考えると、各モードごとに別の音声出力装置を設けた図4のような構成では、音声出力装置自体の周波数特性や音声処理部43の音声出力装置44、45への各出力増幅器の周波数特性を調整することで、各モードごとの好ましい出力周波数特性を実現できる。一方、音声出力装置を各モードで共用するようにした構成では、何らかの対策を講じないとモード対応の出力周波数特性が同じになってしまう。しかし、図4のような構成は2つの音声出力装置を設けることから、1つの音声出力装置を共用する構成と比べると小型化、省スペース化、低価格化という点では不利である。
【0005】
本発明の目的は、スピーカモードとレシーバモードで1つの音声出力装置を共用した構成において、各モードで望ましい音声出力周波数特性をもたせるようにした携帯型無線通信機を提供することにある。
【0006】
【課題を解決するための手段】
本発明は、音声通信が可能で、ユーザが音声を聞くためのスピーカモードとレシーバモードを備えた携帯型無線通信機であって、
スピーカモードとレシーバモードの双方で1つの音声出力装置を共用するとともに、その音声出力装置への入力音声信号の周波数特性をスピーカモードかレシーバモードかに応じて切替えるための周波数特性切替手段を設けた携帯型無線通信機を開示する。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。図1は、本発明の携帯型無線通信機の受信系構成例を示すブロック図で、周波数特性切替手段14が設けられているのが特徴である。アンテナ11から入力された受信波は受信部12で受信、復調処理され、音声信号は音声処理・制御部13に送られる。音声処理・制御部13では通信モードがレシーバモードかスピーカモードかによって、また使用者によって設定された音声出力レベル等によって、音声信号の増幅、レベル調整等を行う。最終的に音声信号はスピーカ等の音声出力装置15から無線機外部に出力されるが、本発明では音声出力装置15に入力される音声信号を音声出力装置15に入力する前に、音声処理・制御部13からのレシーバモード又はスピーカモードであるかの通信モード判別信号Mによって、周波数特性を切替えられるような周波数特性切替手段14に通すことにより、レシーバモードとスピーカモードで異なる周波数特性を持たせることを可能にするものである。
【0008】
図2は、周波数特性切替手段14の構成例を示すもので、多重帰還型ローパスフィルタにアナログスイッチ21、コンデンサ22、23を付加し、アナログスイッチ21を制御することで周波数特性を切替えられるように構成されている。図3は、この図2の回路の周波数特性(振巾特性)の例を示したもので、コンデンサ22、23の容量をC1、C2として、R1=10kΩ、R2=68kΩ、R3=4.7kΩ、C1=0.01μF、C2=1000pFとした場合で、縦軸は振巾利得(dB)、横軸は周波数を示している。曲線SPで示す振巾特性はアナログスイッチ21をオフとしたときに得られ、曲線REで示した振巾特性はアナログスイッチ21をオンとしたときに得られる。
【0009】
そこでいま、音声出力装置15の周波数特性がほぼ音声帯域でフラットな特性とすると、スピーカモードのときはフラットな特性が好ましいので、判別信号Mがスピーカモードを示しているときにはアナログスイッチ21をオフとし、またレシーバモードのときは音声帯域高域部が強調された曲線REのような特性が好ましいので、判別信号Mがレシーバモードを示しているときにはアナログスイッチ21をオンするように制御する。このようにすることで、1つの音声出力装置をスピーカ/レシーバの両モードで共用した小型省スペース化、低価格化が可能な構成でも、両モードのそれぞれで好ましい音声出力の周波数特性を実現することができる。
【0010】
なお、スピーカモード、レシーバモードのいずれについても、ユーザが聞きとり易い周波数特性は、使用環境や使用する音声出力装置、無線機の筐体の音響特性などによって異なってくるが、周波数特性切替手段をこれらの条件を考慮したものとすることで容易に対応可能である。
【0011】
【発明の効果】
ユーザが受話部を耳に当て音声を聞くレシーバモード及び受話部から大きな音声を出力し耳を離して聞くスピーカモードのどちらのモードにおいても共通の音声出力装置を使用することにより、無線機の小型化、省スペース化、低コスト化が可能でかつ、スピーカモード、レシーバモードのいずれか、あるいは両方で音声出力部の周波数特性を変えることにより、それぞれのモードに適した周波数特性を設定することができる。
【図面の簡単な説明】
【図1】本発明の携帯型無線通信機の受信系構成例を示すブロック図である。
【図2】周波数特性切替手段の構成例を示す回路図である。
【図3】図2の回路の振巾特性例である。
【図4】従来の携帯型無線通信機の受信系構成例を示すブロック図である。
【符号の説明】
13 音声処理・制御部
14 周波数特性切替手段
15 音声出力装置
21 アナログスイッチ
22、23 コンデンサ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable wireless communication device for performing voice communication, and more particularly to a portable wireless communication device capable of outputting received voice by selecting one of a receiver mode and a speaker mode.
[0002]
[Prior art]
Portable wireless communicators that perform voice communication include mobile phones and transceivers. In mobile phones, there is a telephone mode in which the user touches the earpiece and listens to the voice. Some have two types of audio output modes, a hands-free mode for listening. In addition, a portable wireless communication device (transceiver) for business use and the like generally has two modes of a press talk transmission / reception system (simplex) and a simultaneous transmission / reception system (duplex), The duplex mode is a receiver mode in which a user puts a receiver on an ear to listen to a sound, and the simpler mode is a speaker mode in which a loud voice is output from the receiver and listens away from the ear.
[0003]
FIG. 4 shows a configuration example of a conventional portable wireless communication apparatus receiving system, in which an audio output device (speaker) 44 for outputting audio in a speaker mode and an audio output device (receiver) 45 for outputting audio in a receiver mode are provided. ing. The reception wave input from the antenna 41 is received and demodulated by thereception unit 42, and the audio signal is sent to theaudio processing unit 43. This audio signal is output from theaudio output device 44 in the speaker mode, and is output from the separately providedaudio output device 45 in the receiver mode. In many portable wireless communication devices, an audio output device is provided for each mode as described above, but there is also a portable wireless communication device configured to share one audio output device in each mode.
[0004]
[Problems to be solved by the invention]
In the speaker mode, the sound vibration output from the sound output device propagates widely into the space and reaches the ear, whereas in the receiver mode, the sound vibration output from the sound output device directly enters the narrow ear opening. For this reason, the level of the sound vibration is made sufficiently smaller in the receiver mode than in the speaker mode, and the output frequency spectrum of the sound signal output from the sound output device is also suitable for each mode due to the difference in the propagation path characteristics of the sound vibration. It is easier to hear. Considering the ease of listening, in the configuration as shown in FIG. 4 in which another audio output device is provided for each mode, the frequency characteristics of the audio output device itself and theaudio output devices 44 and 45 of theaudio processing unit 43 are provided. By adjusting the frequency characteristics of each output amplifier to each other, preferable output frequency characteristics for each mode can be realized. On the other hand, in a configuration in which the audio output device is shared in each mode, the output frequency characteristics corresponding to the mode become the same unless some countermeasure is taken. However, the configuration shown in FIG. 4 is disadvantageous in terms of miniaturization, space saving, and cost reduction as compared with a configuration in which one audio output device is shared because two audio output devices are provided.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable wireless communication device that has a desired audio output frequency characteristic in each mode in a configuration in which one audio output device is shared between a speaker mode and a receiver mode.
[0006]
[Means for Solving the Problems]
The present invention is a portable wireless communication device capable of voice communication and having a speaker mode and a receiver mode for a user to hear voice,
One audio output device is shared in both the speaker mode and the receiver mode, and frequency characteristic switching means for switching the frequency characteristic of an audio signal input to the audio output device according to the speaker mode or the receiver mode is provided. A portable wireless communication device is disclosed.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described. FIG. 1 is a block diagram showing a configuration example of a receiving system of a portable wireless communication device according to the present invention, which is characterized in that a frequencycharacteristic switching unit 14 is provided. The reception wave input from the antenna 11 is received and demodulated by thereception unit 12, and the audio signal is sent to the audio processing /control unit 13. The audio processing /control unit 13 performs amplification and level adjustment of the audio signal depending on whether the communication mode is the receiver mode or the speaker mode, and the audio output level set by the user. Although the audio signal is finally output from theaudio output device 15 such as a speaker to the outside of the wireless device, in the present invention, before the audio signal input to theaudio output device 15 is input to theaudio output device 15, audio processing / processing is performed. By passing the signal through the frequency characteristic switching means 14 capable of switching the frequency characteristic in accordance with the communication mode determination signal M indicating whether the mode is the receiver mode or the speaker mode from thecontrol unit 13, the receiver mode and the speaker mode have different frequency characteristics. Is what makes it possible.
[0008]
FIG. 2 shows an example of the configuration of the frequency characteristic switching means 14. Ananalog switch 21 andcapacitors 22 and 23 are added to a multiple feedback type low-pass filter so that the frequency characteristic can be switched by controlling theanalog switch 21. It is configured. FIG. 3 shows an example of the frequency characteristic (amplitude characteristic) of the circuit of FIG. 2, where R1 = 10 kΩ, R2 = 68 kΩ, and R3 = 4.7 kΩ, where the capacitances of thecapacitors 22 and 23 are C1 and C2. , C1 = 0.01 μF and C2 = 1000 pF, the vertical axis represents amplitude gain (dB), and the horizontal axis represents frequency. The amplitude characteristic indicated by the curve SP is obtained when theanalog switch 21 is turned off, and the amplitude characteristic indicated by the curve RE is obtained when theanalog switch 21 is turned on.
[0009]
Now, assuming that the frequency characteristic of theaudio output device 15 is almost flat in the audio band, the flat characteristic is preferable in the speaker mode. Therefore, when the determination signal M indicates the speaker mode, theanalog switch 21 is turned off. Also, in the receiver mode, a characteristic such as a curve RE in which the high-frequency portion of the audio band is emphasized is preferable. Therefore, when the discrimination signal M indicates the receiver mode, theanalog switch 21 is controlled to be turned on. In this way, even in a configuration in which one audio output device is commonly used for both the speaker / receiver mode and space saving and cost reduction can be achieved, preferable audio output frequency characteristics are realized in both modes. be able to.
[0010]
In both the speaker mode and the receiver mode, the frequency characteristics that are easy for the user to hear vary depending on the use environment, the audio output device used, the acoustic characteristics of the wireless device housing, and the like. By taking these conditions into consideration, it is possible to easily cope with the situation.
[0011]
【The invention's effect】
By using a common audio output device in both the receiver mode in which the user puts the receiver on the ear and listens to the voice and the speaker mode in which the receiver outputs a loud voice and listens away from the ear, the size of the radio can be reduced. By changing the frequency characteristics of the audio output unit in either the speaker mode or the receiver mode or both, it is possible to set the frequency characteristics suitable for each mode. it can.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration example of a receiving system of a portable wireless communication device according to the present invention.
FIG. 2 is a circuit diagram illustrating a configuration example of a frequency characteristic switching unit.
FIG. 3 is an example of amplitude characteristics of the circuit of FIG. 2;
FIG. 4 is a block diagram illustrating a configuration example of a receiving system of a conventional portable wireless communication device.
[Explanation of symbols]
13 Audio processing /control unit 14 Frequency characteristic switching means 15Audio output device 21 Analog switches 22, 23 Capacitor

Claims (1)

Translated fromJapanese
音声通信が可能で、ユーザが音声を聞くためのスピーカモードとレシーバモードを備えた携帯型無線通信機であって、
スピーカモードとレシーバモードの双方で1つの音声出力装置を共用するとともに、その音声出力装置への入力音声信号の周波数特性をスピーカモードかレシーバモードかに応じて切替えるための周波数特性切替手段を設けた携帯型無線通信機。
A portable wireless communication device capable of voice communication and having a speaker mode and a receiver mode for a user to hear voice,
One audio output device is shared in both the speaker mode and the receiver mode, and frequency characteristic switching means for switching the frequency characteristic of an audio signal input to the audio output device according to the speaker mode or the receiver mode is provided. Portable wireless communicator.
JP2002293385A2002-10-072002-10-07 Portable wireless communication devicePendingJP2004129112A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP2002293385AJP2004129112A (en)2002-10-072002-10-07 Portable wireless communication device

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP2002293385AJP2004129112A (en)2002-10-072002-10-07 Portable wireless communication device

Publications (1)

Publication NumberPublication Date
JP2004129112Atrue JP2004129112A (en)2004-04-22

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Country Status (1)

CountryLink
JP (1)JP2004129112A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
WO2020152907A1 (en)*2019-01-252020-07-30株式会社ディーアンドエムホールディングスEarphone device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
WO2020152907A1 (en)*2019-01-252020-07-30株式会社ディーアンドエムホールディングスEarphone device
JP2020120332A (en)*2019-01-252020-08-06株式会社ディーアンドエムホールディングス Earphone device
JP7396796B2 (en)2019-01-252023-12-12株式会社ディーアンドエムホールディングス earphone device
US12212913B2 (en)2019-01-252025-01-28D&M Holdings, Inc.Earphone device

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