JPH0555940A - Radio telephone set - Google Patents

Radio telephone set

Info

Publication number
JPH0555940A
JPH0555940A JP3209176A JP20917691A JPH0555940A JP H0555940 A JPH0555940 A JP H0555940A JP 3209176 A JP3209176 A JP 3209176A JP 20917691 A JP20917691 A JP 20917691A JP H0555940 A JPH0555940 A JP H0555940A
Authority
JP
Japan
Prior art keywords
noise
microphone unit
unit
telephone device
wireless telephone
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
JP3209176A
Other languages
Japanese (ja)
Inventor
Hisanori Kanezashi
久則 金指
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3209176A priority Critical patent/JPH0555940A/en
Priority to GB9203382A priority patent/GB2255687B/en
Priority to US07/836,954 priority patent/US5313514A/en
Priority to SE9200699A priority patent/SE9200699L/en
Publication of JPH0555940A publication Critical patent/JPH0555940A/en
Pending legal-status Critical Current

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  • Transceivers (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To send a voice signal with high SIN to an opposite party by eliminating noise caused by noise inputted from a microphone unit. CONSTITUTION:In the radio telephone set in which the power supply for the radio telephone set main body is supplied from a ciger lighter plug plugged into a ciger lighter socket and a transmission voice input microphone unit is provided in the ciger lighter plug, a noise elimination circuit 10 used to eliminate noise caused by noise inputted from the microphone unit 1 is provided between the microphone unit 1 and a suppression circuit unit 3 suppressing a ring tone due to acoustic coupling to send the voice signal without deterioration in the S/N to the opposite party even under environment with a high noise level.

Description

【発明の詳細な説明】Detailed Description of the Invention

【産業上の利用分野】この発明は自動車電話等の無線電
話装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device such as a car telephone.

【従来の技術】従来自動車電話等の無線電話装置は、車
を運転しながら通話することが多いことから、ハンドセ
ットを持たないで通話ができるハンズフリー通話が可能
なことが望ましい。そこで、従来では図2に示すような
ハンズフリー無線電話装置が提供されている。この図に
おいて、1は送話音声入力用マイクユニット、2は受話
音声出力用スピーカユニット、3は上記マイクユニット
1及びスピーカユニット2間の音響結合(ハウリング)
により生じる鳴音を抑圧する回路ユニット、4は無線電
話装置本体、5はアンテナを示す。上記従来の無線電話
装置では、使用者が発した音声をマイクユニット1が電
気信号に変換して、抑圧回路ユニット3を介して無線電
話装置本体4へ送り、無線電話装置本体4はこの電気信
号を電磁波に変換してアンテナ5より相手側へと送出す
るようになっている。また、相手側から発せられた電磁
波はアンテナ5により受信された後無線電話装置本体4
により音声信号に変換され、抑圧回路ユニット3を介し
てスピーカユニット2へ出力されることにより、スピー
カユニット2から相手方の通話内容がスピーカユニット
2により使用者へ伝達されるようになっている。図3は
上記従来の無線電話装置を自動車に搭載した具体例を示
すもので、無線電話装置本体4の電源は自動車のシガー
ライタソケット6に挿入したシガーライタプラグ7より
ケーブル8を介して供給されており、シガーライタプラ
グ7内には音響的に指向特性を有する送話音声入力用マ
イクユニット1が内装されている。上記構成された従来
の無線電話装置では、自動車を運転している電話使用者
が通話をすべく音声を発すると、この音声は音響的に指
向性を有するマイクユニット1により集音されて音声信
号に変換される。そして無線電話装置本体4へ入力され
た音声信号は無線電話装置本体4により電磁波に変換さ
れてアンテナ5より相手方へ送出される。また相手方の
通話は無線電話装置本体4内で音声信号に変換された後
無線電話装置本体4に設けられたスピーカユニット2よ
り音声として使用者へ伝達されると共に、スピーカユニ
ット2とマイクユニット1間の音響結合により生じる鳴
音は無線電話装置本体4内に設けられた上記抑圧回路ユ
ニット3により抑圧される。
2. Description of the Related Art Conventionally, a wireless telephone device such as a car telephone often makes a call while driving a vehicle. Therefore, it is desirable that a hands-free call can be made without a handset. Therefore, conventionally, a hands-free wireless telephone device as shown in FIG. 2 has been provided. In this figure, reference numeral 1 is a microphone unit for transmitting voice input, 2 is a speaker unit for receiving voice output, and 3 is acoustic coupling between the microphone unit 1 and the speaker unit 2 (howling).
A circuit unit for suppressing the ringing sound caused by 4 is a main body of the wireless telephone device, and 5 is an antenna. In the above-described conventional wireless telephone device, the microphone unit 1 converts the voice uttered by the user into an electric signal and sends it to the wireless telephone device main body 4 via the suppression circuit unit 3, and the wireless telephone device main body 4 receives this electric signal. Is converted into an electromagnetic wave and transmitted from the antenna 5 to the other party. In addition, after the electromagnetic wave emitted from the other party is received by the antenna 5, the wireless telephone device body 4
Is converted into a voice signal and output to the speaker unit 2 via the suppression circuit unit 3, so that the speaker unit 2 transmits the content of the call of the other party to the user. FIG. 3 shows a specific example in which the above-mentioned conventional radio telephone device is mounted in an automobile. The power of the radio telephone device body 4 is supplied from a cigarette lighter plug 7 inserted in a cigarette lighter socket 6 of the automobile through a cable 8. In the cigarette lighter plug 7, a transmission voice input microphone unit 1 having acoustically directional characteristics is installed. In the conventional radiotelephone device configured as described above, when a telephone user driving an automobile emits a voice to make a call, the voice is collected by the microphone unit 1 having acoustic directivity to produce a voice signal. Is converted to. The voice signal input to the radio telephone main body 4 is converted into an electromagnetic wave by the radio telephone main body 4 and sent out to the other party from the antenna 5. In addition, the call of the other party is converted into a voice signal in the wireless telephone device body 4 and then transmitted as a voice from the speaker unit 2 provided in the wireless telephone device body 4 to the user, and between the speaker unit 2 and the microphone unit 1. The ringing sound generated by the acoustic coupling of is suppressed by the suppression circuit unit 3 provided in the main body 4 of the wireless telephone device.

【発明が解決しようとする課題】しかし、上記従来の無
線電話装置では、ハンドセットを使用して通話を行う場
合に比べて、使用者からマイクユニット1までの距離が
離れているため、車内の騒音が使用者の音声とともにマ
イクユニット1へ入力されてしまう。その結果、騒音は
雑音となって音声信号へ混入された状態で相手方へ送出
されるため、音声信号のS/Nが劣化して、通話の内容
が相手方に伝達され難い欠点があった。この発明は上記
欠点を解消するためになされたもので、S/Nの高い音
声信号が相手方へ送出できるようにした無線電話装置を
提供することを目的とするものである。
However, in the above-described conventional wireless telephone device, the distance from the user to the microphone unit 1 is greater than that in the case of making a call using a handset, and therefore noise in the vehicle is increased. Is input to the microphone unit 1 together with the user's voice. As a result, the noise is sent to the other party in the state of being mixed with the voice signal as the noise, so that the S / N of the voice signal is deteriorated and the content of the call is difficult to be transmitted to the other party. The present invention has been made to solve the above drawbacks, and an object of the present invention is to provide a wireless telephone device capable of transmitting a voice signal having a high S / N to the other party.

【課題を解決するための手段】この発明は上記目的を達
成するために、自動車内の運転席前方付近に設けられた
シガーライタソケットにシガーライタプラグを挿入し
て、このシガーライタプラグよりケーブルを介して車内
に設置された無線電話装置本体へ電源を供給すると共
に、上記シガーライタプラグ内に送話音声入力用マイク
ユニットを、そして無線電話装置本体内に受話音声出力
用スピーカユニット及び上記マイクユニットとスピーカ
ユニットの音響結合を抑圧する回路ユニットを設けた無
線電話装置において、上記マイクユニットと音響結合を
抑圧する回路ユニットの間に、マイクユニットより入力
した騒音により音声信号に混入した雑音を除去する雑音
除去回路を設けたものである。
To achieve the above object, the present invention inserts a cigarette lighter plug into a cigarette lighter socket provided in the vicinity of the front of a driver's seat in a vehicle, and uses the cigarette lighter plug to insert the inside of the vehicle through a cable. The power supply to the main body of the wireless telephone device installed in, the microphone unit for transmitting voice input in the cigarette lighter plug, and the speaker unit for receiving voice output in the main body of the wireless telephone device and the microphone unit and speaker unit In a radiotelephone device provided with a circuit unit for suppressing acoustic coupling, a noise removing circuit for removing noise mixed in a voice signal due to noise input from the microphone unit is provided between the microphone unit and the circuit unit for suppressing acoustic coupling. It is provided.

【作用】上記構成により音声信号中の雑音は雑音除去回
路により除去されるため、騒音レベルの高い環境下でも
S/Nの劣化のない音声信号が相手方へ送出できるよう
になる。
With the above structure, the noise in the voice signal is removed by the noise removing circuit, so that the voice signal without deterioration of S / N can be transmitted to the other party even in an environment with a high noise level.

【実施例】この発明の一実施例を図1に示す図面を参照
して詳述する。なお、従来と同一部分は同一符号を付し
てその詳細な説明は省略する。図において、1は送話音
声入力用マイクユニットで、運転席の前方に設けられた
シガーライタソケット6に挿入されたシガーライタプラ
グ7内に設けられていて、使用者の音声を音声信号に変
換するようになっており、このとき車内の騒音も上記マ
イクユニット1に入力されるため、この騒音は雑音とし
て音声信号に混入される。雑音の混入された音声信号
は、雑音除去回路10へ入力されるようになっている。
上記雑音除去回路10は音声信号中の雑音を除去してS
/Nを高めるようになっており、この雑音除去回路10
によりS/Nの高められた音声信号は音響結合による鳴
音を抑圧する抑圧回路ユニット3を介して無線電話装置
本体4へ入力され、この無線電話装置本体4により電磁
波に変換されて、アンテナ5より相手方へ送出される。
一方、相手方より送出された電磁波はアンテナ5により
受信されて無線電話装置本体4へ入力され、ここで音声
信号に変換される。そしてこの音声信号は抑圧回路ユニ
ット3を介して無線電話装置本体4に設けられた受話音
声用スピーカユニット2より車内に音声として放出さ
れ、使用者へ伝達されるようになる。以上のように使用
者からマイクユニット1までの距離が離れているため、
車内の騒音をマイクユニット1が拾っても、雑音除去回
路10が騒音により生じた雑音を除去するため、S/N
の高い音声信号を無線電話装置本体4により電磁波に変
換して相手方へ送出することができるようになる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawing shown in FIG. The same parts as those of the related art are designated by the same reference numerals, and detailed description thereof will be omitted. In the figure, reference numeral 1 is a microphone unit for inputting a transmission voice, which is provided in a cigarette lighter plug 7 inserted in a cigarette lighter socket 6 provided in front of a driver's seat so as to convert a user's voice into an audio signal. Since the noise inside the vehicle is also input to the microphone unit 1 at this time, this noise is mixed into the voice signal as noise. The audio signal mixed with noise is input to the noise removing circuit 10.
The noise removing circuit 10 removes noise from the voice signal to remove S
/ N is increased, and the noise removing circuit 10
The voice signal with an increased S / N is input to the wireless telephone device body 4 via the suppression circuit unit 3 that suppresses the ringing due to acoustic coupling, is converted into an electromagnetic wave by the wireless telephone device body 4, and the antenna 5 Will be sent to the other party.
On the other hand, the electromagnetic wave transmitted from the other party is received by the antenna 5 and input to the wireless telephone device body 4, where it is converted into a voice signal. Then, the voice signal is emitted as voice into the vehicle through the suppression circuit unit 3 from the speaker unit 2 for received voice provided in the radio telephone main body 4, and is transmitted to the user. As described above, since the distance from the user to the microphone unit 1 is large,
Even if the microphone unit 1 picks up the noise in the vehicle, the noise elimination circuit 10 eliminates the noise caused by the noise.
It becomes possible to convert a high voice signal into an electromagnetic wave by the radio telephone main body 4 and send it to the other party.

【発明の効果】この発明は以上詳述したように、車内の
騒音をマイクユニットが拾っても、雑音除去回路がこの
騒音による雑音を除去するため、S/Nの高い音声信号
を相手方へ送出できるようになる。これによって騒音レ
ベルの高い環境下にあっても、S/Nの劣化のない音声
信号を相手方へ送ることができることから、相手方で通
話の内容が判読できないなどの不具合を解消することが
できるようになる。
As described in detail above, even if the microphone unit picks up the noise in the vehicle, the noise eliminating circuit eliminates the noise due to this noise, so that a voice signal having a high S / N is sent to the other party. become able to. As a result, even in an environment with a high noise level, it is possible to send a voice signal without deterioration of S / N to the other party, so that the other party can solve the problem that the contents of the call cannot be read. Become.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例になる無線電話装置のブロ
ック図
FIG. 1 is a block diagram of a wireless telephone device according to an embodiment of the present invention.

【図2】従来の無線電話装置のブロック図FIG. 2 is a block diagram of a conventional wireless telephone device.

【図3】従来の無線電話装置を自動車に搭載した状態の
平面図
FIG. 3 is a plan view showing a state in which a conventional wireless telephone device is mounted on an automobile.

【符号の説明】[Explanation of symbols]

1 送話音声入力用マイクユニット 2 受話音声出力用スピーカユニット 3 抑圧回路ユニット 4 無線電話装置本体 6 シガーライタソケット 7 シガーライタプラグ 8 ケーブル 10 雑音除去回路 1 Microphone unit for transmitting voice input 2 Speaker unit for receiving voice output 3 Suppression circuit unit 4 Wireless telephone device body 6 Cigar lighter socket 7 Cigar lighter plug 8 Cable 10 Noise elimination circuit

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 自動車内の運転席前方付近に設けられた
シガーライタソケットにシガーライタプラグを挿入し
て、このシガーライタプラグよりケーブルを介して車内
に設置された無線電話装置本体へ電源を供給すると共
に、上記シガーライタプラグ内に送話音声入力用マイク
ユニットを、そして無線電話装置本体内に受話音声出力
用スピーカユニット及び上記マイクユニットとスピーカ
ユニットの音響結合を抑圧する回路ユニットを設けた無
線電話装置において、上記マイクユニットと音響結合を
抑圧する回路ユニットの間に、マイクユニットより入力
した騒音により音声信号に混入した雑音を除去する雑音
除去回路を設けてなる無線電話装置。
1. A cigarette lighter plug is inserted into a cigarette lighter socket provided near the front of a driver's seat in a vehicle, and the cigarette lighter plug supplies power to a wireless telephone device body installed in the vehicle through a cable, A microphone unit for transmitting voice input in the cigarette lighter plug, and a speaker unit for receiving voice output in the main body of the wireless telephone device and a wireless telephone device provided with a circuit unit for suppressing acoustic coupling between the microphone unit and the speaker unit, A radio telephone device comprising a noise removing circuit for removing noise mixed in a voice signal due to noise input from the microphone unit, between the microphone unit and a circuit unit for suppressing acoustic coupling.
JP3209176A 1991-05-07 1991-08-21 Radio telephone set Pending JPH0555940A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP3209176A JPH0555940A (en) 1991-08-21 1991-08-21 Radio telephone set
GB9203382A GB2255687B (en) 1991-05-07 1992-02-18 Radio telephone apparatus
US07/836,954 US5313514A (en) 1991-05-07 1992-02-19 Hands free apparatus for land mobile radio telephone
SE9200699A SE9200699L (en) 1991-05-07 1992-03-06 Radiotelephone apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3209176A JPH0555940A (en) 1991-08-21 1991-08-21 Radio telephone set

Publications (1)

Publication Number Publication Date
JPH0555940A true JPH0555940A (en) 1993-03-05

Family

ID=16568596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3209176A Pending JPH0555940A (en) 1991-05-07 1991-08-21 Radio telephone set

Country Status (1)

Country Link
JP (1) JPH0555940A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5444978A (en) * 1993-03-15 1995-08-29 Toyota Jidosha Kabushiki Kaisha Catalyst warming up device of an internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256257A (en) * 1984-06-01 1985-12-17 Nissan Motor Co Ltd Automobile telephone set

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256257A (en) * 1984-06-01 1985-12-17 Nissan Motor Co Ltd Automobile telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5444978A (en) * 1993-03-15 1995-08-29 Toyota Jidosha Kabushiki Kaisha Catalyst warming up device of an internal combustion engine

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