JP2001156706A - Wireless communication system - Google Patents
Wireless communication systemInfo
- Publication number
- JP2001156706A JP2001156706A JP34052599A JP34052599A JP2001156706A JP 2001156706 A JP2001156706 A JP 2001156706A JP 34052599 A JP34052599 A JP 34052599A JP 34052599 A JP34052599 A JP 34052599A JP 2001156706 A JP2001156706 A JP 2001156706A
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- Japan
- Prior art keywords
- radio wave
- weak
- weak radio
- normal
- audio signal
- 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.)
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- Mobile Radio Communication Systems (AREA)
- Telephone Function (AREA)
- Radio Transmission System (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Transmitters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無線通話装置に係
わり、特に、音声信号を優先度別に分けて通常電波と微
弱電波の２系統で送受信する無線通話装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device, and more particularly to a radio communication device for transmitting and receiving voice signals in two systems, a normal radio wave and a weak radio wave, according to priority.
【０００２】[0002]
【従来の技術】従来から、離隔地間で音声信号の送受信
を行なう無線通話装置として、図２に示すようなものが
提案されている。2. Description of the Related Art Conventionally, a wireless communication apparatus for transmitting and receiving a voice signal between remote places has been proposed as shown in FIG.
【０００３】図２は、従来の無線通話装置のブロック図
を示している。FIG. 2 shows a block diagram of a conventional radio communication device.
【０００４】図２において、離隔地間に配置される無線
通話装置３、４は、それぞれ、音声信号の送受信を行
い、音声の入出力を行う通話回路３１、４１と、予め法
制で認可されている電波（以下、「通常電波」とい
う。）を送信する送信回路３２、４２と、通常電波を受
信する受信回路３３、４３とで構成されている。In FIG. 2, radio communication devices 3 and 4 arranged between remote places transmit and receive voice signals and perform voice input / output, respectively. It comprises transmission circuits 32 and 42 for transmitting a radio wave (hereinafter referred to as “normal radio wave”) and receiving circuits 33 and 43 for receiving the normal radio wave.
【０００５】このように構成された無線通話装置３、４
においては、一方の無線通話装置３の通話回路３１に音
声が入力されると、この通話回路３１において音声信号
に変えられ、送信回路３２へ出力される。ここで、無線
装置における音声の伝送は、電波法の規定により、伝送
できる音声帯域が制限されていることから、この送信回
路３２において、音声信号の周波数帯域を法制で認可さ
れている帯域まで制限され、通常電波の周波数にまで変
調されてから、電波が無線通話装置３の外部へ送信され
る。[0005] The wireless communication devices 3 and 4 configured as described above.
In, when a voice is input to the communication circuit 31 of one of the wireless communication devices 3, the voice signal is converted into a voice signal in the communication circuit 31 and output to the transmission circuit 32. Here, the transmission of voice in the wireless device is limited by the provisions of the Radio Law, so the transmission circuit 32 limits the frequency band of the voice signal to a band authorized by law. After being modulated to the frequency of a normal radio wave, the radio wave is transmitted to the outside of the wireless communication device 3.
【０００６】一方、他方の無線通話装置４から送信され
てくる通常電波は、一方の無線通話装置３の受信回路３
３で受信され、受信された通常電波は復調されて音声信
号に変えられてから通話回路３１へ出力される。そし
て、この通話回路３１において、音声信号が音声に変え
られ、出力される。On the other hand, the normal radio wave transmitted from the other wireless communication device 4 is transmitted to the receiving circuit 3 of the one wireless communication device 3.
The received normal radio wave is demodulated and converted into an audio signal, and then output to the communication circuit 31. Then, in the communication circuit 31, the voice signal is converted into voice and output.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、従来の
無線通話装置においては、電波法の規定により、伝送で
きる音声帯域が制限されることから、すなわち、送信回
路で音声信号の周波数帯域が制限されるため、有線式に
比べて、音質が悪くなるという難点があった。However, in the conventional wireless communication device, the transmittable voice band is limited by the provisions of the Radio Law, that is, the frequency band of the voice signal is limited by the transmission circuit. Therefore, there was a problem that the sound quality was deteriorated as compared with the wired type.
【０００８】本発明は上述の難点を解消するためになさ
れたもので、音質の悪化を軽減しうる無線通話装置を提
供することを目的とする。The present invention has been made in order to solve the above-mentioned difficulties, and an object of the present invention is to provide a radio communication device capable of reducing deterioration of sound quality.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
め、本発明による無線通話装置は、予め法制で認可され
ている通常電波を送信する通常電波送信部と、優先度の
高い音声信号を通常電波送信部へ通す通常電波用フィル
タと、微弱電波を送信する微弱電波送信部と、優先度の
低い音声信号を微弱電波送信部へ通す微弱電波用フィル
タと、通常電波を受信する通常電波受信部と、微弱電波
を受信する微弱電波受信部と、通常電波受信部から出力
される優先度の高い音声信号および微弱電波受信部から
出力される優先度の低い音声信号を合成する加算器とを
備えたことを特徴としている。In order to achieve the above object, a radio communication apparatus according to the present invention comprises: a normal radio wave transmitting section for transmitting a normal radio wave which is approved in advance by law; A normal radio wave filter that passes through the normal radio wave transmitter, a weak radio wave transmitter that transmits weak radio waves, a weak radio wave filter that passes low-priority audio signals through the weak radio wave transmitter, and a normal radio wave receiver that receives normal radio waves Unit, a weak radio wave receiving unit that receives a weak radio wave, and an adder that combines a high priority audio signal output from the normal radio wave receiving unit and a low priority audio signal output from the weak radio wave receiving unit. It is characterized by having.
【００１０】このような無線通話装置によれば、電波法
の規定により、伝送できる音声帯域に制限があるため送
信できなかった音声信号の周波数帯域分を、微弱電波送
信部で送信し、この微弱電波を受信部において元の音声
信号に合成していることから、音質の悪化を軽減でき
る。According to such a radio communication device, the frequency band of an audio signal that could not be transmitted due to the limitation of the audio band that can be transmitted according to the provisions of the Radio Law is transmitted by the feeble radio wave transmitting unit, Since the radio wave is combined with the original audio signal in the receiving unit, deterioration of sound quality can be reduced.
【００１１】[0011]
【発明の実施の形態】以下、本発明による無線通話装置
の好ましい一実施例を、図面を参照して詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a wireless communication device according to the present invention will be described in detail with reference to the drawings.
【００１２】図１は、本発明による無線通話装置を示す
ブロック図である。FIG. 1 is a block diagram showing a wireless communication apparatus according to the present invention.
【００１３】図１において、離隔地間に配置される本発
明の無線通話装置１、２は、それぞれ、音声信号の送受
信を行い、音声の入出力を行う通話回路１１、２１と、
この通話回路１１、２１に並列に接続された通常電波用
フィルタ１２、２２および微弱電波用フィルタ１３、２
３と、加算器１４、２４とを備えており、通常電波用フ
ィルタ１２、２２には、送信回路１５ａ、２５ａを有す
る通常電波送信部１５、２５がそれぞれ接続され、微弱
電波用フィルタ１３、２３には、送信回路１６ａ、２６
ａおよび出力調整回路１６ｂ、２６ｂを有する微弱電波
送信部１６、２６がそれぞれ接続され、加算器１４、２
４には、受信回路１７ａ、２７ａを有する通常電波受信
部１７、２７および受信回路１８ａ、２８ａを有する微
弱電波受信部１８、２８がそれぞれ並列に接続されてい
る。In FIG. 1, wireless communication devices 1 and 2 of the present invention arranged between remote places respectively transmit and receive voice signals and input and output voice signals.
Normal radio wave filters 12 and 22 and weak radio wave filters 13 and 2 connected in parallel to the communication circuits 11 and 21.
3 and adders 14 and 24. The normal radio wave filters 12 and 22 are connected to normal radio wave transmission units 15 and 25 having transmission circuits 15a and 25a, respectively. Have transmission circuits 16a and 26
a and the weak radio wave transmission units 16 and 26 having output adjustment circuits 16 b and 26 b are connected to each other.
4 is connected in parallel to normal radio wave receiving units 17 and 27 having receiving circuits 17a and 27a and weak radio wave receiving units 18 and 28 having receiving circuits 18a and 28a, respectively.
【００１４】ここで、通常電波用フィルタ１２、２２
は、それぞれ、通話回路１１、２１から送信される音声
信号のうち、優先度の高い音声信号のみを通常電波送信
部１５、２５へ通す機能を有しており、通常電波送信部
１５、２５は、それぞれ、通常電波用フィルタ１２、２
２を通過する音声信号を通常電波に変調し、その通常電
波を送信回路１５ａ、２５ａを介して無線通話装置１、
２の外部へ送信する機能を有している。なお、通常電波
用フィルタ１２、２２は、通常、音声信号の低域が優先
度の高い信号となるので、それぞれローパスフィルタと
なる。Here, the normal radio wave filters 12, 22
Has a function of passing only high-priority audio signals of the audio signals transmitted from the communication circuits 11 and 21 to the normal radio wave transmitting units 15 and 25, respectively. , Respectively, the normal radio wave filters 12, 2
2 is modulated into a normal radio wave, and the normal radio wave is transmitted through the transmitting circuits 15a and 25a to the radio communication device 1,
2 has a function of transmitting to the outside. Note that the normal radio wave filters 12 and 22 are low-pass filters, respectively, because the low frequency band of the audio signal is a signal with a high priority.
【００１５】また、微弱電波用フィルタ１３、２３は、
それぞれ、通話回路１１、２１から送信される音声信号
のうち、優先度の低い音声信号のみを微弱電波送信部１
６、２６へ通す機能を有しており、微弱電波送信部１
６、２６は、それぞれ、微弱電波用フィルタ１３、２３
を通過する音声信号を微弱電波に変調し、その微弱電波
を送信回路１６ａ、２６ａに入力し、この送信回路１６
ａ、２６ａから出力する電波を出力調整回路１６ｂ、２
６ｂで微弱電波の出力レベルにまで調整した上で無線通
話装置１、２の外部へ送信している。なお、微弱電波用
フィルタ１３、２３は、通常、音声信号の高域が優先度
の低い信号となるので、それぞれ、ハイパスフィルタと
なる。The weak radio wave filters 13 and 23 are
Of the audio signals transmitted from the communication circuits 11 and 21, respectively, only the low priority audio signal is transmitted to the weak radio wave transmitting unit 1.
6 and 26, and a weak radio wave transmitting unit 1
Reference numerals 6 and 26 denote weak radio wave filters 13 and 23, respectively.
Is modulated into a weak radio wave, and the weak radio wave is input to the transmission circuits 16a and 26a.
a, 26a to output adjustment circuits 16b, 2
In step 6b, the output level of the weak radio wave is adjusted and then transmitted to the outside of the radio communication devices 1 and 2. Note that the weak radio wave filters 13 and 23 are usually high-pass filters because the high frequency range of the audio signal is a signal having a low priority.
【００１６】一方、通常電波受信部１７、２７は、無線
通話装置１、２より送信されてくる通常電波を受信回路
１７ａ、２７ａで受信し、これを音声信号に復調する機
能を有しており、また、微弱電波受信部１８、２８は、
無線通話装置１、２より送信されてくる微弱電波を受信
回路１８ａ、２８ａで受信し、これを音声信号に復調す
る機能を有している。On the other hand, the normal radio wave receiving units 17 and 27 have a function of receiving the normal radio waves transmitted from the wireless communication devices 1 and 2 by the receiving circuits 17a and 27a and demodulating them into audio signals. Also, the weak radio wave receiving units 18 and 28
The reception circuits 18a and 28a receive the weak radio waves transmitted from the wireless communication devices 1 and 2 and demodulate them into audio signals.
【００１７】また、加算器１４、２４は、それぞれ、通
常電波受信部１７、２７から出力される優先度の高い音
声信号と、微弱電波受信部１８、２８から出力される優
先度の低い音声信号とを合成する機能を有している。The adders 14 and 24 respectively provide a high-priority audio signal output from the normal radio wave receiving units 17 and 27 and a low-priority audio signal output from the weak radio wave receiving units 18 and 28, respectively. And a function of synthesizing
【００１８】次に、このように構成された無線通話装置
１、２の動作について説明する。Next, the operation of the radio communication devices 1 and 2 configured as described above will be described.
【００１９】先ず、一方の無線通話装置１の通話回路１
１に音声が入力されると、その音声は電気信号である音
声信号に変換され、通常電波用フィルタ１２と微弱電波
用フィルタ１３へ出力され、ここで優先度の高い音声信
号と優先度の低い音声信号とに分離される。そして、通
常電波用フィルタ１２に音声信号が入力されると、優先
度の高い音声信号が通常電波送信部１５へ出力される。
そして、通常電波送信部１５では、優先度の高い音声信
号が送信回路１５ａによって通常電波に変調された後、
無線通話装置１の外部へ送信される。First, the communication circuit 1 of one radio communication device 1
When an audio signal is input to the audio signal 1, the audio signal is converted into an audio signal, which is an electric signal, and is output to the normal radio wave filter 12 and the weak radio wave filter 13, where the high priority audio signal and the low priority audio signal are output. Separated into audio signals. Then, when an audio signal is input to the normal radio wave filter 12, a high priority audio signal is output to the normal radio wave transmission unit 15.
Then, in the normal radio wave transmitting unit 15, after the high priority audio signal is modulated into the normal radio wave by the transmission circuit 15a,
It is transmitted to the outside of the wireless communication device 1.
【００２０】また、微弱電波用フィルタ１３では、音声
信号が入力されると優先度の低い音声信号が微弱電波送
信部１６へ出力される。そして、微弱電波送信部１６で
は、優先度の低い音声信号が送信回路１６ａによって微
弱電波に変調され、その微弱電波は微弱電波送信部１６
を構成する出力調整回路１６ｂにおいて、出力レベルが
電波法に規定のない微弱電波のレベルにまで調整されて
から無線通話装置１の外部へ送信される。In the weak radio wave filter 13, when an audio signal is input, a low priority audio signal is output to the weak radio wave transmitting unit 16. Then, in the weak radio wave transmitting unit 16, the audio signal of low priority is modulated into a weak radio wave by the transmission circuit 16 a, and the weak radio wave is transmitted to the weak radio wave transmitting unit 16.
In the output adjusting circuit 16b, the output level is adjusted to a level of a weak radio wave not specified in the Radio Law and then transmitted to the outside of the wireless communication device 1.
【００２１】一方、他方の無線通話装置２より送信され
てくる通常電波は、一方の無線通話装置１の通常電波受
信部１７で受信され、受信回路１７ａにおいて優先度の
高い音声信号に変調された後、加算器１４へ出力され
る。また、他方の無線通話装置２より送信されてくる微
弱電波は、一方の無線通話装置１の微弱電波受信部１８
で受信され、受信回路１８ａにおいて優先度の低い音声
信号に変調された後、加算器１４へ出力される。On the other hand, the normal radio wave transmitted from the other radio communication device 2 is received by the normal radio wave receiving section 17 of the one radio communication device 1, and is modulated by the receiving circuit 17a into a high priority audio signal. Thereafter, it is output to the adder 14. The weak radio wave transmitted from the other wireless communication device 2 is transmitted to the weak radio wave receiving unit 18 of the one wireless communication device 1.
, And after being modulated by the receiving circuit 18a into a low-priority audio signal, is output to the adder 14.
【００２２】しかして、加算器１４において、優先度の
高い音声信号と優先度の低い音声信号とが合成され、こ
れにより、周波数帯域制限のない音声信号が通話回路１
１へ送信される。従って、通話回路１１からは、音質の
良好な音声が出力することになる。Thus, the adder 14 synthesizes the high-priority audio signal and the low-priority audio signal.
1 is transmitted. Therefore, a voice with good sound quality is output from the communication circuit 11.
【００２３】なお、前述の実施例においては、主とし
て、一方の無線通話装置１の送受信について述べている
が、本発明はこれに限定されず、他方の無線通話装置２
において送受信しても前述と同様の効果を奏する。In the above embodiment, transmission and reception of one radio communication device 1 is mainly described. However, the present invention is not limited to this, and the other radio communication device 2 may be used.
The same effect as described above can be obtained by transmitting and receiving data.
【００２４】[0024]
【発明の効果】以上の説明から明らかなように、本発明
の無線通話装置によれば、電波法の規定により、音声帯
域の制限によって伝送できない音声の高域部分を電波法
で規定されていない微弱電波を使用して、無線の送受信
をいわゆる２系統にして伝送しているので、音質の悪化
を軽減できる。As is apparent from the above description, according to the radio communication apparatus of the present invention, the radio law does not specify the high-frequency portion of the voice that cannot be transmitted due to the limitation of the voice band, according to the radio law. Since weak radio waves are used to transmit and receive wireless signals in a so-called two system, deterioration in sound quality can be reduced.
【図１】本発明による無線通話装置の一実施例を示すブ
ロック図。FIG. 1 is a block diagram showing an embodiment of a wireless communication device according to the present invention.
【図２】従来の無線通話装置を示すブロック図。FIG. 2 is a block diagram showing a conventional wireless communication device.
１２・・・通常電波用フィルタ １３・・・微弱電波用フィルタ １４・・・加算器 １５・・・通常電波送信部 １６・・・微弱電波送信部 １７・・・通常電波受信部 １８・・・微弱電波受信部 12 ... Normal radio wave filter 13 ... Weak radio wave filter 14 ... Adder 15 ... Normal radio wave transmission unit 16 ... Weak radio wave transmission unit 17 ... Normal radio wave reception unit 18 ... Weak radio wave receiver
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｈ０４Ｍ 9/00 Ｈ０４Ｂ 7/26 Ｑ Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (Reference) // H04M 9/00 H04B 7/26 Q
Claims (1)
する通常電波送信部（１５）と、優先度の高い音声信号
を前記通常電波送信部へ通す通常電波用フィルタ（１
２）と、微弱電波を送信する微弱電波送信部（１６）
と、優先度の低い音声信号を前記微弱電波送信部へ通す
微弱電波用フィルタ（１３）と、前記通常電波を受信す
る通常電波受信部（１７）と、前記微弱電波を受信する
微弱電波受信部（１８）と、前記通常電波受信部から出
力される優先度の高い音声信号および前記微弱電波受信
部から出力される優先度の低い音声信号を合成する加算
器（１４）とを備えたことを特徴とする無線通話装置。An ordinary radio wave transmitting unit (15) for transmitting an ordinary radio wave which is approved in advance by law, and a normal radio wave filter (1) for passing a high priority audio signal to the normal radio wave transmitting unit.
2) and a weak radio wave transmitting unit (16) for transmitting a weak radio wave
A weak radio wave filter (13) for passing a low-priority audio signal to the weak radio wave transmitting unit; a normal radio wave receiving unit (17) for receiving the normal radio wave; and a weak radio wave receiving unit for receiving the weak radio wave (18) and an adder (14) for synthesizing a high-priority audio signal output from the normal radio wave receiving unit and a low-priority audio signal output from the weak radio wave receiving unit. A wireless communication device characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34052599A JP2001156706A (en) | 1999-11-30 | 1999-11-30 | Wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34052599A JP2001156706A (en) | 1999-11-30 | 1999-11-30 | Wireless communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001156706A true JP2001156706A (en) | 2001-06-08 |
Family
ID=18337828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34052599A Withdrawn JP2001156706A (en) | 1999-11-30 | 1999-11-30 | Wireless communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001156706A (en) |
-
1999
- 1999-11-30 JP JP34052599A patent/JP2001156706A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070206 |